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1
CALDER, Philip C. "n–3 Fatty acids and cardiovascular disease: evidence explained and mechanisms explored." Clinical Science 107, no. 1 (June 23, 2004): 1–11. http://dx.doi.org/10.1042/cs20040119.
Повний текст джерелаАнотація:
Long chain n–3 PUFAs (polyunsaturated fatty acids) are found in fatty fish and in fish oils. Substantial evidence from epidemiological and case-control studies indicates that consumption of fish, fatty fish and long-chain n–3 PUFAs reduces the risk of cardiovascular mortality. Secondary prevention studies using long-chain n–3 PUFAs in patients post-myocardial infarction have shown a reduction in total and cardiovascular mortality, with an especially potent effect on sudden death. Long-chain n–3 PUFAs have been shown to decrease blood triacylglycerol (triglyceride) concentrations, to decrease production of chemoattractants, growth factors, adhesion molecules, inflammatory eicosanoids and inflammatory cytokines, to lower blood pressure, to increase nitric oxide production, endothelial relaxation and vascular compliance, to decrease thrombosis and cardiac arrhythmias and to increase heart rate variability. These mechanisms most likely explain the primary and secondary cardiovascular protection afforded by long-chain n–3 PUFA consumption. A recent study suggests that long-chain n–3 PUFAs might also act to stabilize advanced atherosclerotic plaques, perhaps through their anti-inflammatory effects. As a result of the robust evidence in their favour, a number of recommendations to increase intake of long-chain n–3 PUFAs have been made.
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Kirkup, S. E., Z. Cheng, M. Elmes, D. C. Wathes, and D. R. E. Abayasekara. "Polyunsaturated fatty acids modulate prostaglandin synthesis by ovine amnion cells in vitro." REPRODUCTION 140, no. 6 (December 2010): 943–51. http://dx.doi.org/10.1530/rep-09-0575.
Повний текст джерелаАнотація:
Diets or supplements high in n-3 and n-6 polyunsaturated fatty acids (PUFAs) have been shown to influence the timing of parturition. PUFAs are substrates for prostaglandin (PG) synthesis, and PGs play central roles in parturition. Hence, the effects of altering PUFA composition may be mediated through alterations in the type and relative quantities of PGs synthesised. Therefore, we have investigated the effects of a range of n-3 and n-6 PUFAsin vitroon PG synthesis by amnion cells of late gestation ewes. The n-6 PUFA, arachidonic acid (20:4, n-6), increased synthesis of two-series PGs. Degree of stimulation induced by the n-6 PUFAs was dependent on the position of the PUFA in the PG synthetic pathway, i.e. PG production of the two-series (principally prostaglandin E2:PGE2) increased progressively with longer chain PUFAs. Effects of n-3 PUFAs on output of PGE2were more modest and variable. The two shorter chain n-3 PUFAs, α-linolenic acid (18:3, n-3) and stearidonic acid (18:4, n-3), induced a small but significant increase in PGE2output, while the longest chain n-3 PUFA docosahexaenoic acid (22:6, n-3) inhibited PGE2synthesis. Dihomo-γ-linolenic acid (20:3, n-6), the PUFA substrate for synthesis of one-series PGs, induced an increase in PGE1generation and a decrease in PGE2and PGE3outputs. Hence, we have demonstrated that PUFA supplementation of ovine amnion cellsin vitroaffects the type and quantity of PGs synthesised.
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Chen, Yuhui, He Cao, Dawei Sun, Changxin Lin, Liang Wang, Minjun Huang, Huaji Jiang, et al. "Endogenous Production of n-3 Polyunsaturated Fatty Acids Promotes Fracture Healing in Mice." Journal of Healthcare Engineering 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/3571267.
Повний текст джерелаАнотація:
Bone fracture is a global healthcare issue for high rates of delayed healing and nonunions. Although n-3 polyunsaturated fatty acid (PUFA) is considered as a beneficial factor for bone metabolism, only few studies till date focused on the effects of n-3 PUFAs on fracture healing. In this study, we investigated the effect of endogenous n-3 PUFAs on fracture healing by measuring femur fracture repair in bothfat-1transgenic mice and WT mice. Proximal femoral fracture model was established infat-1transgenic mice and WT mice, respectively, and then the fracture was analyzed by using X-ray, micro-computed tomography (micro-CT), and histological assessment at 7, 14, 21, 28, and 35 days after fixation. The results showed that compared with WT mice,fat-1mice exhibited acceleration in fracture healing through radiographic and histological analysis (18–21 days versus 21–28 days postfracture). Meanwhile, X-ray and micro-CT analysis that showed better remodeling callus formation were in thefat-1group compared to WT group. Furthermore, histological analysis revealed that endogenous n-3 PUFAs promoted local endochondral ossification and accelerated the remodeling of calcified calluses after fracture. In conclusion, the present study indicated that endogenously produced n-3 PUFAs promote fracture healing process and accelerate bone remodeling in mice, and supplementation of n-3 PUFAs was positively associated with fracture healing.
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Remize, Marine, Yves Brunel, Joana L. Silva, Jean-Yves Berthon, and Edith Filaire. "Microalgae n-3 PUFAs Production and Use in Food and Feed Industries." Marine Drugs 19, no. 2 (February 18, 2021): 113. http://dx.doi.org/10.3390/md19020113.
Повний текст джерелаАнотація:
N-3 polyunsaturated fatty acids (n-3 PUFAs), and especially eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), are essential compounds for human health. They have been proven to act positively on a panel of diseases and have interesting anti-oxidative, anti-inflammatory or anti-cancer properties. For these reasons, they are receiving more and more attention in recent years, especially future food or feed development. EPA and DHA come mainly from marine sources like fish or seaweed. Unfortunately, due to global warming, these compounds are becoming scarce for humans because of overfishing and stock reduction. Although increasing in recent years, aquaculture appears insufficient to meet the increasing requirements of these healthy molecules for humans. One alternative resides in the cultivation of microalgae, the initial producers of EPA and DHA. They are also rich in biochemicals with interesting properties. After defining macro and microalgae, this review synthesizes the current knowledge on n-3 PUFAs regarding health benefits and the challenges surrounding their supply within the environmental context. Microalgae n-3 PUFA production is examined and its synthesis pathways are discussed. Finally, the use of EPA and DHA in food and feed is investigated. This work aims to define better the issues surrounding n-3 PUFA production and supply and the potential of microalgae as a sustainable source of compounds to enhance the food and feed of the future.
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Remize, Marine, Frédéric Planchon, Ai Ning Loh, Fabienne Le Grand, Christophe Lambert, Antoine Bideau, Adeline Bidault, Rudolph Corvaisier, Aswani Volety, and Philippe Soudant. "Identification of Polyunsaturated Fatty Acids Synthesis Pathways in the Toxic Dinophyte Alexandrium minutum Using 13C-Labelling." Biomolecules 10, no. 10 (October 8, 2020): 1428. http://dx.doi.org/10.3390/biom10101428.
Повний текст джерелаАнотація:
The synthetic pathways responsible for the production of the polyunsaturated fatty acids 22:6n-3 and 20:5n-3 were studied in the Dinophyte Alexandrium minutum. The purpose of this work was to follow the progressive incorporation of an isotopic label (13CO2) into 11 fatty acids to better understand the fatty acid synthesis pathways in A. minutum. The Dinophyte growth was monitored for 54 h using high-frequency sampling. A. minutum presented a growth in two phases. A lag phase was observed during the first 30 h of development and had been associated with the probable temporary encystment of Dinophyte cells. An exponential growth phase was then observed after t30. A. minutum rapidly incorporated 13C into 22:6n-3, which ended up being the most 13C-enriched polyunsaturated fatty acid (PUFA) in this experiment, with a higher 13C atomic enrichment than 18:4n-3, 18:5n-3, 20:5n-3, and 22:5n-3. Overall, the 13C atomic enrichment (AE) was inversely proportional to number of carbons in n-3 PUFA. C18 PUFAs, 18:4n-3, and 18:5n-3, were indeed among the least 13C-enriched FAs during this experiment. They were assumed to be produced by the n-3 PUFA pathway. However, they could not be further elongated or desaturated to produce n-3 C20-C22 PUFA, because the AEs of the n-3 C18 PUFAs were lower than those of the n-3 C20-C22 PUFAs. Thus, the especially high atomic enrichment of 22:6n-3 (55.8% and 54.9% in neutral lipids (NLs) and polar lipids (PLs), respectively) led us to hypothesize that this major PUFA was synthesized by an O2-independent Polyketide Synthase (PKS) pathway. Another parallel PKS, independent of the one leading to 22:6n-3, was also supposed to produce 20:5n-3. The inverse order of the 13C atomic enrichment for n-3 PUFAs was also suspected to be related to the possible β-oxidation of long-chain n-3 PUFAs occurring during A. minutum encystment.
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Wonnacott, K. E., W. Y. Kwong, J. Hughes, A. M. Salter, R. G. Lea, P. C. Garnsworthy, and K. D. Sinclair. "Dietary omega-3 and -6 polyunsaturated fatty acids affect the composition and development of sheep granulosa cells, oocytes and embryos." REPRODUCTION 139, no. 1 (January 2010): 57–69. http://dx.doi.org/10.1530/rep-09-0219.
Повний текст джерелаАнотація:
The evidence that omega-3 (n-3) and -6 (n-6) polyunsaturated fatty acids (PUFAs) have differential effects on ovarian function, oocytes and embryo quality is inconsistent. We report on the effects of n-3 versus n-6 PUFA-enriched diets fed to 36 ewes over a 6-week period, prior to ovarian stimulation and follicular aspiration, on ovarian steroidogenic parameters and embryo quality. Follicle number and size were unaltered by diet, but follicular-fluid progesterone concentrations were greater in n-3 PUFA-fed ewes than in n-6 PUFA-fed ewes. The percentage of saturated FAs (mostly stearic acid) was greater in oocytes than in either granulosa cells or plasma, indicating selective uptake and/or de novo synthesis of saturated FAs at the expense of PUFAs by oocytes. High-density lipoproteins (HDLs) fractionated from sera of these ewes increased granulosa cell proliferation and steroidogenesis relative to the FA-free BSA control during culture, but there was no differential effect of n-3 and n-6 PUFAs on either oestradiol or progesterone production. HDL was ineffective in delivering FAs to embryos during culture, although n-6 PUFA HDL reduced embryo development. All blastocysts, irrespective of the treatment, contained high levels of unsaturated FAs, in particular linoleic acid. Transcripts for HDL and low-density lipoprotein (LDL) receptors (SCARB1 and LDLR) and stearoyl-CoA desaturase (SCD) are reported in sheep embryos. HDL reduced the expression of transcripts for LDLR and SCD relative to the BSA control. The data support a differential effect of n-3 and n-6 PUFAs on ovarian steroidogenesis and pre-implantation development, the latter in the absence of a net uptake of FAs.
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Koppelmann, Tal, Yulia Pollak, Yoav Ben-Shahar, Gregory Gorelik, and Igor Sukhotnik. "The Mechanisms of the Anti-Inflammatory and Anti-Apoptotic Effects of Omega-3 Polyunsaturated Fatty Acids during Methotrexate-Induced Intestinal Damage in Cell Line and in a Rat Model." Nutrients 13, no. 3 (March 10, 2021): 888. http://dx.doi.org/10.3390/nu13030888.
Повний текст джерелаАнотація:
Background: The aim of this study was to examine the anti-inflammatory and anti-apoptotic patterns of omega-3 polyunsaturated fatty acids (n-3 PUFAs) during methotrexate (MTX) induced intestinal damage in cell culture and in a rat model. Methods: Non-treated and treated with MTX HT 29 and HCT116cells were exposed to increasing doses of n-3 PUFAs and cell viability was evaluated using PrestoBlue® assay. Male Sprague-Dawley rats were divided into 4 experimental groups: Control rats, CONTR+n-3 PUFA rats that were treated with oral n-3 PUFA, MTX rats were treated with MTX given IP, and MTX+n-3 PUFA rats were treated with oral n-3 PUFA before and following injection of MTX. Intestinal mucosal parameters and mucosal inflammation, enterocyte proliferation and apoptosis, TNF-α in mucosal tissue and plasma (ELISA), NF-κB, COX-2, TNF-α, Fas, FasL, Fadd, Bid, Bax and Bcl-2gene and protein levels were determined 72 h following MTX injection. Results: Exposure of HT 29 and HCT116cells to n-3 PUFA attenuated inhibiting effects of MTX on cell viability. MTX-n-3 PUFA rats demonstrated a lower intestinal injury score and enhanced intestinal repair. A significant decrease in enterocyte apoptosis in MTX+n-3 PUFA rats was accompanied by decreased TNF-α, FAS, FasL, FADD and BID mRNA levels. Decreased NF-κB, COX-2 and TNF-α levels in mucosa was accompanied by a decreased number of IELs and macrophages. Conclusions: n-3 PUFAs inhibit NF-κB/COX-2 induced production of pro-inflammatory cytokines and inhibit cell apoptosis mainly by extrinsic pathway in rats with MTX-induced intestinal damage.
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Kim, Sun Hee, Kyung Hee Roh, Jong-Sug Park, Kwang-Soo Kim, Hyun Uk Kim, Kyeong-Ryeol Lee, Han-Chul Kang, and Jong-Bum Kim. "Heterologous Reconstitution of Omega-3 Polyunsaturated Fatty Acids inArabidopsis." BioMed Research International 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/768478.
Повний текст джерелаАнотація:
Reconstitution of nonnative, very-long-chain polyunsaturated fatty acid (VLC-PUFA) biosynthetic pathways inArabidopsis thalianawas undertaken. The introduction of three primary biosynthetic activities to cells requires the stable coexpression of multiple proteins within the same cell. Herein, we report that C22VLC-PUFAs were synthesized from C18precursors by reactions catalyzed byΔ6-desaturase, an ELOVL5-like enzyme involved in VLC-PUFA elongation, andΔ5-desaturase. Coexpression of the corresponding genes (McD6DES, AsELOVL5, andPtD5DES) under the control of the seed-specific vicilin promoter resulted in production of docosapentaenoic acid (22:5 n-3) and docosatetraenoic acid (22:4 n-6) as well as eicosapentaenoic acid (20:5 n-3) and arachidonic acid (20:4 n-6) inArabidopsisseeds. The contributions of the transgenic enzymes and endogenous fatty acid metabolism were determined. Specifically, the reasonable synthesis of omega-3 stearidonic acid (18:4 n-3) could be a useful tool to obtain a sustainable system for the production of omega-3 fatty acids in seeds of a transgenic T3 line 63-1. The results indicated that coexpression of the three proteins was stable. Therefore, this study suggests that metabolic engineering of oilseed crops to produce VLC-PUFAs is feasible.
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Prescott, Susan L., Anne E. Barden, Trevor A. Mori, and Janet A. Dunstan. "Maternal fish oil supplementation in pregnancy modifies neonatal leukotriene production by cord-blood-derived neutrophils." Clinical Science 113, no. 10 (October 12, 2007): 409–16. http://dx.doi.org/10.1042/cs20070111.
Повний текст джерелаАнотація:
Fish oil supplementation has been shown to reduce neutrophil production of inflammatory LTB4 (leukotriene B4) in adults. The present study is the first to examine the effects on neonatal neutrophil function following supplementation in pregnancy. Pregnant women with allergic disease (n=98) were randomized to receive either fish oil [3.7 g of n−3 long-chain PUFAs (polyunsaturated fatty acids)/day] or a placebo supplement for the final 20 weeks of pregnancy. Leukotriene production by neonatal neutrophils was measured after stimulation with the calcium ionophore A23187. This was examined in relation to supplementation, cell membrane fatty acid levels and mononuclear cytokine production. Neutrophil LTB4 production was significantly reduced in neonates whose mothers had received fish oil in pregnancy. This was most evident for isomer 2 of LTB4 (P=0.031), although this was also observed for total LTB4 (P=0.051) and isomer 1 (P=0.088). There was also a trend for lower production of other PUFA metabolites, namely 5-HETE (5-hydroxyeicosatetraenoic acid; P=0.054) in the fish oil group. Accordingly, LTB4 levels were inversely related to membrane n−3 PUFA levels. Less inflammatory products (LTB5) were only produced at very low levels, although there was a trend for higher levels of this metabolite in the fish oil group. Consistent with this, LTB5 levels were positively correlated with n−3 PUFA membrane levels, particularly EPA (eicosapentanoic acid) and negatively correlated with n−6 PUFAs. Neonates with lower neutrophil LTB4 production also had lower production of pro-inflammatory IL (interleukin)-6 responses (r=0.35, P=0.005) and regulatory IL-10 responses (r=0.37, P=0.003) by LPS (lipopolysaccharide)-stimulated neonatal mononuclear cells. In conclusion, maternal dietary changes can modify neonatal neutrophil function. This has implications for the early immune programming, which can be influenced by the inflammatory milieu of local tissues during initial antigen encounter. It also provides evidence of another pathway through which long-chain PUFAs status can influence early immune development.
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Ferchaud-Roucher, Véronique, Yassine Zair, Audrey Aguesse, Michel Krempf, and Khadija Ouguerram. "Omega 3 Improves Both apoB100-containing Lipoprotein Turnover and their Sphingolipid Profile in Hypertriglyceridemia." Journal of Clinical Endocrinology & Metabolism 105, no. 10 (August 17, 2020): 3152–64. http://dx.doi.org/10.1210/clinem/dgaa459.
Повний текст джерелаАнотація:
Abstract Context Evidence for an association between sphingolipids and metabolic disorders is increasingly reported. Omega-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFAs) improve apolipoprotein B100 (apoB100)-containing lipoprotein metabolism, but their effects on the sphingolipid content in lipoproteins remain unknown. Objectives In subjects with hypertriglyceridemia, we analyzed the effect of n-3 LC-PUFAs on the turnover apoB100-containing lipoproteins and on their sphingolipid content and looked for the possible association between these lipid levels and apoB100-containing lipoprotein turnover parameters. Methods Six subjects underwent a kinetic study before and after n-3 supplementation for 2 months with 1 g of fish oil 3 times day containing 360 mg of eicosapentaenoic acid (EPA) and 240 mg of docosahexaenoic acid (DHA) in the form of triglycerides. We examined apoB100-containing lipoprotein turnover by primed perfusion labeled [5,5,5-2H3]-leucine and determined kinetic parameters using a multicompartmental model. We quantified sphingolipid species content in lipoproteins using mass spectrometry. Results Supplementation decreased very low-density lipoprotein (VLDL), triglyceride, and apoB100 concentrations. The VLDL neutral and polar lipids showed increased n-3 LC-PUFA and decreased n-6 LC-PUFA content. The conversion rate of VLDL1 to VLDL2 and of VLDL2 to LDL was increased. We measured a decrease in total apoB100 production and VLDL1 production. Supplementation reduced the total ceramide concentration in VLDL while the sphingomyelin content in LDL was increased. We found positive correlations between plasma palmitic acid and VLDL ceramide and between VLDL triglyceride and VLDL ceramide, and inverse correlations between VLDL n-3 LC-PUFA and VLDL production. Conclusion Based on these results, we hypothesize that the improvement in apoB100 metabolism during n-3 LC-PUFA supplementation is contributed to by changes in sphingolipids
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Fjære, Even, Lene Secher Myrmel, Karianne Dybing, Ondrej Kuda, Benjamin Anderschou Holbech Jensen, Martin Rossmeisl, Livar Frøyland, Karsten Kristiansen, and Lise Madsen. "The Anti-Obesogenic Effect of Lean Fish Species Is Influenced by the Fatty Acid Composition in Fish Fillets." Nutrients 12, no. 10 (October 3, 2020): 3038. http://dx.doi.org/10.3390/nu12103038.
Повний текст джерелаАнотація:
Fillets from marine fish species contain n-3 polyunsaturated fatty acids (PUFAs) in the form of phospholipids (PLs). To investigate the importance of PL-bound n-3 PUFAs in mediating the anti-obesogenic effect of lean seafood, we compared the anti-obesogenic properties of fillets from cod with fillets from pangasius, a fresh water fish with a very low content of PL-bound n-3 PUFAs. We prepared high-fat/high-protein diets using chicken, cod and pangasius as the protein sources, and fed male C57BL/6J mice these diets for 12 weeks. Mice fed the diet containing cod gained less adipose tissue mass and had smaller white adipocytes than mice fed the chicken-containing diet, whereas mice fed the pangasius-containing diet were in between mice fed the chicken-containing diet and mice fed the cod-containing diet. Of note, mice fed the pangasius-containing diet exhibited reduced glucose tolerance compared to mice fed the cod-containing diet. Although the sum of marine n-3 PUFAs comprised less than 2% of the total fatty acids in the cod-containing diet, this was sufficient to significantly increase the levels of eicosapentaenoic acid (EPA) and docosahexaenoic acids (DHA) in mouse tissues and enhance production of n-3 PUFA-derived lipid mediators as compared with mice fed pangasius or chicken.
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Wakefield, Sarah L., Michelle Lane, Samantha J. Schulz, Michelle L. Hebart, Jeremy G. Thompson, and Megan Mitchell. "Maternal supply of omega-3 polyunsaturated fatty acids alter mechanisms involved in oocyte and early embryo development in the mouse." American Journal of Physiology-Endocrinology and Metabolism 294, no. 2 (February 2008): E425—E434. http://dx.doi.org/10.1152/ajpendo.00409.2007.
Повний текст джерелаАнотація:
Despite the well-known benefits of omega-3 ( n-3) polyunsaturated fatty acid (PUFA) supplementation on human health, relatively little is known about the effect of n-3 PUFA intake on fertility. More specifically, the aim of this study was to determine how oocyte and preimplantation embryo development might be influenced by n-3 PUFA supply and to understand the possible mechanisms underlying these effects. Adult female mice were fed a control diet or a diet relatively high in the long-chain n-3 PUFAs for 4 wk, and ovulated oocytes or zygotes were collected after gonadotropin stimulation. Oocytes were examined for mitochondrial parameters (active mitochondrial distribution, mitochondrial calcium and membrane potential) and oxidative stress, and embryo developmental ability was assessed at the blastocyst stage following 1) in vitro fertilization (IVF) or 2) culture of in vivo-derived zygotes. This study demonstrated that exposure of the oocyte during maturation in the ovary to an environment high in n-3 PUFA resulted in altered mitochondrial distribution and calcium levels and increased production of reactive oxygen species. Despite normal fertilization and development in vitro following IVF, the exposure of oocytes to an environment high in n-3 PUFA during in vivo fertilization adversely affected the morphological appearance of the embryo and decreased developmental ability to the blastocyst stage. This study suggests that high maternal dietary n-3 PUFA exposure periconception reduces normal embryo development in the mouse and is associated with perturbed mitochondrial metabolism, raising questions regarding supplementation with n-3 PUFAs during this period of time.
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Tremblay, André J., Benoît Lamarche, Jean-Charles Hogue, and Patrick Couture. "n-3 Polyunsaturated Fatty Acid Supplementation Has No Effect on Postprandial Triglyceride-Rich Lipoprotein Kinetics in Men with Type 2 Diabetes." Journal of Diabetes Research 2016 (2016): 1–5. http://dx.doi.org/10.1155/2016/2909210.
Повний текст джерелаАнотація:
Dietary n-3 polyunsaturated fatty acids (PUFAs) have been proposed to modulate plasma lipids, lipoprotein metabolism, and inflammatory state and to reduce triglyceride (TG) concentrations. The present double-blind, randomized, placebo-controlled, crossover study investigated the effects of n-3 PUFA supplementation at 3 g/d for 8 weeks on the intravascular kinetics of intestinally derived apolipoprotein (apo) B-48-containing lipoproteins in 10 men with type 2 diabetes.In vivokinetics of the TG-rich lipoprotein (TRL) apoB-48 and VLDL apoB-100 were assessed using a primed-constant infusion of L-[5,5,5-D3] leucine for 12 hours in a fed state. Compared with the placebo, n-3 PUFA supplementation significantly reduced fasting TG concentrations by −9.7% (P=0.05) but also significantly increased plasma levels of cholesterol (C) (+6.0%,P=0.05), LDL-C (+12.2%,P=0.04), and HDL-C (+8.4,P=0.007). n-3 PUFA supplementation had no significant impact on postprandial TRL apoB-48 and VLDL apoB-100 levels or on the production or catabolic rates of these lipoproteins. These data indicate that 8-week supplementation with n-3 PUFAs in men with type 2 diabetes has no beneficial effect on TRL apoB-48 and VLDL apoB-100 levels or kinetics.
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Lozano-Muñoz, Ivonne, Susana Muñoz, Nelson F. Díaz, Alberto Medina, Jazmín Bazaes, and Carlos Riquelme. "Nutritional Enhancement of Farmed Salmon Meat via Non-GMO Nannochloropsis Gaditana: Eicosapentaenoic Acid (EPA, 20:5 n-3), Docosapentaenoic Acid (DPA, 22:5 n-3) and Vitamin D3 for Human Health." Molecules 25, no. 20 (October 10, 2020): 4615. http://dx.doi.org/10.3390/molecules25204615.
Повний текст джерелаАнотація:
Omega-3 long-chain polyunsaturated fatty acids (n-3 LC PUFAs) and vitamin D3 are essential components of human nutrition. A regular human diet is highly deficient in n-3 LC PUFAs. Fish like salmon are highly recommended in the human diet as they are a major source of high-value n-3 LC PUFAs and vitamin D3. The levels of these nutrients have been decreasing over the last few years in farmed salmon, whose production urgently needs sustainable sources of these nutrients. The microalga Nannochloropsis gaditana (NG) is known for its naturally high potential for the production of eicosapentaenoic (EPA, 20:5 n-3) fatty acid. A commercial diet for Atlantic salmon was supplemented with 1% and 10% of spray-dried NG grown under controlled conditions for a high EPA content. Salmon were harvested on day 49, following which, boneless and skinless salmon meat was recovered from fish and analyzed for the fatty acid profile, total fat, and vitamin D3. Vitamin D3, EPA, and docosapentaenoic fatty acid (DPA, 22:5 n-3) levels were significantly increased (p < 0.05) by supplementing the basal diet with 10% NG, thus, NG represents a novel, functional, natural ingredient and a sustainable source of n-3 LC-PUFAs that can raise the levels of healthy fats and vitamin D3 in farmed salmon meat.
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Roszkos, Róbert, Tamás Tóth, and Miklós Mézes. "Review: Practical Use of n-3 Fatty Acids to Improve Reproduction Parameters in the Context of Modern Sow Nutrition." Animals 10, no. 7 (July 6, 2020): 1141. http://dx.doi.org/10.3390/ani10071141.
Повний текст джерелаАнотація:
The effects of long-chain polyunsaturated fatty acids (LC PUFAs) have been frequently investigated in sows because the profitability of pig production depends mainly on reproduction performance. In feeding trials, different sources and doses of n-3 PUFAs-rich feeds were used with various breeds and stages of production; however, a discrepancy in the response of n-3 PUFAs on sow reproduction has been observed. According to the results of the previous studies, n-3 fatty acids can postpone the time of parturition, decreasing the synthesis of prostaglandins, which are necessary for uterus contraction during labour. These effects could also be useful during the post-weaning period when low prostaglandin levels are indispensable for embryo survival. The n-3 fatty acids fed during the lactation period secreted in milk, may improve piglet performance. In this review, we will focus on the contradictory results of previous studies concerning practical swine nutrition. The main purpose of the review is to highlight those periods of swine breeding when the use of n-3 fatty acids may be advantageous in case of the deficiency of these essential nutrients. In finding the appropriate dose of n-3 PUFAs in terms of sow nutrition, the n-6 PUFAs levels in the given feeds must be taken into account to ensure that there are no significant reductions in the final n-6/n-3 ratio. Despite the numerous previous field trials, there are no current feeding recommendations available for PUFAs in swine nutrition. Hence, more research is required in different practical feeding situations to certify the assumptions and conclusions of this review.
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Cheng, Z., M. Elmes, SE Kirkup, DR Abayasekara, and DC Wathes. "Alteration of prostaglandin production and agonist responsiveness by n-6 polyunsaturated fatty acids in endometrial cells from late-gestation ewes." Journal of Endocrinology 182, no. 2 (August 1, 2004): 249–56. http://dx.doi.org/10.1677/joe.0.1820249.
Повний текст джерелаАнотація:
We investigated the effect of n-6 polyunsaturated fatty acids (PUFAs) on prostaglandin (PG) production by the uterus. A mixed population of endometrial cells (epthelium and stroma) from late-gestation ewes were cultured in defined medium containing linoleic acid (LA, 18:2, n-6), gamma-linolenic acid (GLA, 18:3, n-6) or arachidonic acid (AA, 20:4, n-6) in concentrations of 0 (control), 20 or 100 microM. After 45 h in test medium with or without added PUFAs, cells were challenged with control medium (CM), oxytocin (OT, 250 nM), lipopolysaccharide (LPS, 0.1 micro g/ml) or dexamethasone (DEX, 5 microM) for 22 h in the continued presence of the same concentration of PUFA and the medium was collected for measurement of PGF(2alpha) and PGE(2). Supplementation with LA inhibited the production of PGF(2alpha) but did not alter PGE(2), whereas GLA and AA increased production of both PGs. All PUFA supplements thus increased the ratio of PGE(2) to PGF(2alpha) (E:F ratio) two- to threefold. In control cells, OT and LPS challenges stimulated the production of PGF(2alpha) and PGE(2). In all challenge groups, the concentrations of PGF(2alpha) in response to PUFAs followed the same pattern - LA<control<;GLA<AA - but there were significant alterations in responsiveness as a result of PUFA treatment. In the cells supplemented with 100 microM AA, there was no further increase in PGF(2alpha) output in the presence of OT or LPS and when 100 microM GLA was present neither LPS nor OT stimulated PGE(2) significantly. When LPS was given to AA-supplemented cells, the E:F ratio was increased. DEX did not change PGE(2) production in control or LA-treated cells, but the cells produced significantly less PGF(2alpha), so the E:F ratio was increased. In contrast, in GLA- and AA-treated cells, DEX reduced the production of both PGF(2alpha) and PGE(2), so the E:F ratio was unaltered. In summary, the study showed altered production of PGs in the presence of different PUFAs according to their position in the n-6 metabolic pathway. The type of PUFA present affected responsiveness to OT, LPS and DEX and also changed the ratio of PGE(2) to PGF(2alpha) produced. The possible implications of this work are discussed in relation to the effect of diet on term and pre-term labour, which both require upregulation of the endometrial PG synthetic pathway.
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Oppedisano, Francesca, Roberta Macrì, Micaela Gliozzi, Vincenzo Musolino, Cristina Carresi, Jessica Maiuolo, Francesca Bosco, et al. "The Anti-Inflammatory and Antioxidant Properties of n-3 PUFAs: Their Role in Cardiovascular Protection." Biomedicines 8, no. 9 (August 25, 2020): 306. http://dx.doi.org/10.3390/biomedicines8090306.
Повний текст джерелаАнотація:
Polyunsaturated fatty acids (n-3 PUFAs) are long-chain polyunsaturated fatty acids with 18, 20 or 22 carbon atoms, which have been found able to counteract cardiovascular diseases. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), in particular, have been found to produce both vaso- and cardio-protective response via modulation of membrane phospholipids thereby improving cardiac mitochondrial functions and energy production. However, antioxidant properties of n-3 PUFAs, along with their anti-inflammatory effect in both blood vessels and cardiac cells, seem to exert beneficial effects in cardiovascular impairment. In fact, dietary supplementation with n-3 PUFAs has been demonstrated to reduce oxidative stress-related mitochondrial dysfunction and endothelial cell apoptosis, an effect occurring via an increased activity of endogenous antioxidant enzymes. On the other hand, n-3 PUFAs have been shown to counteract the release of pro-inflammatory cytokines in both vascular tissues and in the myocardium, thereby restoring vascular reactivity and myocardial performance. Here we summarize the molecular mechanisms underlying the anti-oxidant and anti-inflammatory effect of n-3 PUFAs in vascular and cardiac tissues and their implication in the prevention and treatment of cardiovascular disease.
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Hokynková, Alica, Marie Nováková, Petr Babula, Miroslava Sedláčková, Hana Paulová, Miroslava Hlaváčová, Daniela Charwátová, and Tibor Stračina. "Fatty Acid Supplementation Affects Skin Wound Healing in a Rat Model." Nutrients 14, no. 11 (May 27, 2022): 2245. http://dx.doi.org/10.3390/nu14112245.
Повний текст джерелаАнотація:
Polyunsaturated fatty acids (PUFA) play an important role in reparative processes. The ratio of PUFAs n-3 to n-6 may affect wound healing. The study aimed to evaluate the effect of dietary supplementation with n-3 and n-6 PUFA in two proportions on skin wounds in laboratory rats. Adult male Wistar rats received 20% fat emulsion with a ratio of 1.4:1 (group A) or 4.3:1 (group B) for n-3:n-6 PUFAs at a daily dose of 1 mL/kg. The control group received water under the same conditions. The animals were supplemented a week before and a week after the skin excision performed on the back. The level of wound closure, various parameters of oxidative stress, and plasma fatty acids composition were evaluated. Wound tissue samples were examined by electron microscopy. The administration of fat emulsions led to significant changes in plasma polyunsaturated fatty acid composition. The increased production of reactive nitrogen species, as well as more numerous newly formed blood vessels and a greater amount of highly organized collagen fibrils in both groups A and B may indicate more intensive healing of the skin wound in rats supplemented with polyunsaturated fatty acids in high n-3:n-6 ratio.
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Bellenger, Jérôme, Sandrine Bellenger, Amina Bourragat, Quentin Escoula, Pierre Weill, and Michel Narce. "Intestinal microbiota mediates the beneficial effects of n-3 polyunsaturated fatty acids during dietary obesity,." OCL 28 (2021): 21. http://dx.doi.org/10.1051/ocl/2021006.
Повний текст джерелаАнотація:
Obesity, now considered as a real worldwide epidemic affecting more than 650 million people, is complex and mainly associated with excessive energy intake and changes in eating habits favoring the consumption of diets rich in saturated fat and sugar. This multifactorial pathology is linked to chronic low grade systemic inflammation. Indeed, a high fat diet (HFD) leads to intestinal microbiota dysbiosis increasing gut permeability (partly attributed to a downregulation of genes encoding tight junction proteins) leading to an increase in bacterial lipopolysaccharides (LPS) levels so-called metabolic endotoxemia. Studies have shown that n-3 polyunsaturated fatty acids (PUFAs) are involved in the prevention of obesity and insulin resistance partly through synthesis of lipid mediators. While studies suggest that n-3 PUFAs are able to modulate the gut microbiota, others show no effect of n-3 treatments on intestinal homeostasis. In the present work, we showed that when fed a hypercaloric and obsogenic diet, compared with wild-type (WT) mice, fat-1 mice (with constitutive production of n-3 PUFAs) resist to dietary obesity and associated metabolic disorders, maintain an effective gut barrier function and exhibit greater phylogenic diversity. Moreover, fecal microbiota transplantation from fat-1 to WT mice reversed body weight gain, normalized glucose tolerance and intestinal permeability in association with prevention of alteration of the colon mucus layer. We can conclude that the n-3 PUFA-mediated alterations of gut microbiota contribute to the prevention of metabolic syndrome in fat-1 mice and may represent a promising strategy to prevent metabolic disease and preserve a lean phenotype.
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Saini, Ramesh Kumar, Parchuri Prasad, Reddampalli Venkataramareddy Sreedhar, Kamatham Akhilender Naidu, Xiaomin Shang, and Young-Soo Keum. "Omega−3 Polyunsaturated Fatty Acids (PUFAs): Emerging Plant and Microbial Sources, Oxidative Stability, Bioavailability, and Health Benefits—A Review." Antioxidants 10, no. 10 (October 15, 2021): 1627. http://dx.doi.org/10.3390/antiox10101627.
Повний текст джерелаАнотація:
The omega−3 (n−3) polyunsaturated fatty acids (PUFAs) eicosapentaenoic acid (EPA) and docosahexaenoic (DHA) acid are well known to protect against numerous metabolic disorders. In view of the alarming increase in the incidence of chronic diseases, consumer interest and demand are rapidly increasing for natural dietary sources of n−3 PUFAs. Among the plant sources, seed oils from chia (Salvia hispanica), flax (Linum usitatissimum), and garden cress (Lepidium sativum) are now widely considered to increase α-linolenic acid (ALA) in the diet. Moreover, seed oil of Echium plantagineum, Buglossoides arvensis, and Ribes sp. are widely explored as a source of stearidonic acid (SDA), a more effective source than is ALA for increasing the EPA and DHA status in the body. Further, the oil from microalgae and thraustochytrids can also directly supply EPA and DHA. Thus, these microbial sources are currently used for the commercial production of vegan EPA and DHA. Considering the nutritional and commercial importance of n−3 PUFAs, this review critically discusses the nutritional aspects of commercially exploited sources of n−3 PUFAs from plants, microalgae, macroalgae, and thraustochytrids. Moreover, we discuss issues related to oxidative stability and bioavailability of n−3 PUFAs and future prospects in these areas.
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Izquierdo, Dolors, Montserrat Roura, Míriam Pérez-Trujillo, Sandra Soto-Heras, and María-Teresa Paramio. "Fatty Acids and Metabolomic Composition of Follicular Fluid Collected from Environments Associated with Good and Poor Oocyte Competence in Goats." International Journal of Molecular Sciences 23, no. 8 (April 8, 2022): 4141. http://dx.doi.org/10.3390/ijms23084141.
Повний текст джерелаАнотація:
In goats, embryo oocyte competence is affected by follicle size regardless the age of the females. In previous studies we have found differences in blastocyst development between oocytes coming of small (<3 mm) and large follicles (>3 mm) in prepubertal (1–2 months-old) goats. Oocyte competence and Follicular Fluid (FF) composition changes throughout follicle growth. The aim of this study was to analyze Fatty Acids (FAs) composition and metabolomic profiles of FF recovered from small and large follicles of prepubertal goats and follicles of adult goats. FAs were analyzed by chromatography and metabolites by 1H-Nuclear Magnetic Resonance (1H-NMR) Spectrometry. The results showed important differences between adult and prepubertal follicles: (a) the presence of α,β-glucose in adult and no detection in prepubertal; (b) lactate, -N-(CH3)3 groups and inositol were higher in prepubertal (c) the percentage of Linolenic Acid, Total Saturated Fatty Acids and n-3 PUFAs were higher in adults; and (d) the percentage of Linoleic Acid, total MUFAs, PUFAs, n-6 PUFAs and n-6 PUFAs: n-3 PUFAs ratio were higher in prepubertal goats. Not significant differences were found in follicle size of prepubertal goats, despite the differences in oocyte competence for in vitro embryo production.
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Radoman, Kristina, Vesna Vucic, Aleksandra Arsic, Dejan Cubrilo, Nevena Jeremic, Jovana Jeremic, and Vladimir Jakovljevic. "Effects Of Different PUFA Supplementation On Inflammatory Response Markers In Young Soccer Players." Serbian Journal of Experimental and Clinical Research 16, no. 4 (December 1, 2015): 305–11. http://dx.doi.org/10.1515/sjecr-2015-0055.
Повний текст джерелаАнотація:
AbstractConsidering the limited knowledge regarding the effects of n-3 and n-6 PUFAs on the inflammatory response during physical activity, we aimed to evaluate the level of pro- and anti-inflammatory cytokines in young soccer players before and after a maximal physical load test at the beginning and end of a two-month training process. The study included 75 young footballers from Football School “Kragujevac,” who were followed during the two-month training programme. The subjects were divided into the following groups: 1) control group (consumed a standard diet); 2) group that consumed fish oil (2500 mg of n-3 PUFAs per day); 3) group that consumed nutritional sunflower oil (2500 mg of n-6 PUFAs daily). The maximal progressive exercise test was performed using a treadmill belt. Venous blood samples were drawn 4 times for the determination of cytokine levels (IL-6 and TNF-α): before and after the exercise load test before the two-month training programme (initial measurement) and immediately before and after the exercise load test after the two-month training programme (control measurement). Supplementation with fish oil (n-3) has been associated with reduced levels of IL-6 compared with the initial values. After an acute bout of exercise, n-3 PUFAs did not show a significant effect on inflammatory marker dynamics, whereas n-6 PUFAs slightly stimulated the production of TNF-α.
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Lanza, Ian R., Agnieszka Blachnio-Zabielska, Matthew L. Johnson, Jill M. Schimke, Daniel R. Jakaitis, Nathan K. Lebrasseur, Michael D. Jensen, K. Sreekumaran Nair, and Piotr Zabielski. "Influence of fish oil on skeletal muscle mitochondrial energetics and lipid metabolites during high-fat diet." American Journal of Physiology-Endocrinology and Metabolism 304, no. 12 (June 15, 2013): E1391—E1403. http://dx.doi.org/10.1152/ajpendo.00584.2012.
Повний текст джерелаАнотація:
Omega-3 polyunsaturated fatty acids (n-3 PUFAs) enhance insulin sensitivity and glucose homeostasis in rodent models of insulin resistance. These beneficial effects have been linked with anti-inflammatory properties, but emerging data suggest that the mechanisms may also converge on mitochondria. We evaluated the influence of dietary n-3 PUFAs on mitochondrial physiology and muscle lipid metabolites in the context of high-fat diet (HFD) in mice. Mice were fed control diets (10% fat), HFD (60% fat), or HFD with fish oil (HFD+FO, 3.4% kcal from n-3 PUFAs) for 10 wk. Body mass and fat mass increased similarly in HFD and HFD+FO, but n-3 PUFAs attenuated the glucose intolerance that developed with HFD and increased expression of genes that regulate glucose metabolism in skeletal muscle. Despite similar muscle triglyceride levels in HFD and HFD+FO, long-chain acyl-CoAs and ceramides were lower in the presence of fish oil. Mitochondrial abundance and oxidative capacity were similarly increased in HFD and HFD+FO compared with controls. Hydrogen peroxide production was similarly elevated in HFD and HFD+FO in isolated mitochondria but not in permeabilized muscle fibers, likely due to increased activity and expression of catalase. These results support a hypothesis that n-3 PUFAs protect glucose tolerance, in part by preventing the accumulation of bioactive lipid mediators that interfere with insulin action. Furthermore, the respiratory function of skeletal muscle mitochondria does not appear to be a major factor in sphingolipid accumulation, glucose intolerance, or the protective effects of n-3 PUFAs.
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Li, Siting, Zhangli Hu, Xuewei Yang, and Yan Li. "Effect of Nitrogen Sources on Omega-3 Polyunsaturated Fatty Acid Biosynthesis and Gene Expression in Thraustochytriidae sp." Marine Drugs 18, no. 12 (December 1, 2020): 612. http://dx.doi.org/10.3390/md18120612.
Повний текст джерелаАнотація:
The molecular mechanism that contributes to nitrogen source dependent omega-3 polyunsaturated fatty acid (n-3 PUFA) synthesis in marine oleaginous protists Thraustochytriidae sp., was explored in this study. The fatty acid (FA) synthesis was significantly influenced by the supplement of various levels of sodium nitrate (SN) (1–50 mM) or urea (1–50 mM). Compared with SN (50 mM) cultivation, cells from urea (50 mM) cultivation accumulated 1.16-fold more n-3 PUFAs (49.49% docosahexaenoic acid (DHA) (w/w, of total FAs) and 5.28% docosapentaenoic acid (DPA) (w/w, of total FAs)). Strikingly higher quantities of short chain FAs (<18 carbons) (52.22-fold of that in urea cultivation) were produced from SN cultivation. Ten candidate reference genes (RGs) were screened by using four statistical methods (geNorm, NormFinder, Bestkeeper and RefFinder). MFT (Mitochondrial folate transporter) and NUC (Nucleolin) were determined as the stable RGs to normalize the RT-qPCR (real-time quantitative polymerase chain reaction) data of essential genes related to n-3 PUFAs-synthesis. Our results elucidated that the gene transcripts of delta(3,5)-delta(2,4)-dienoyl-CoA isomerase, enoyl-CoA hydratase, fatty acid elongase 3, long-chain fatty acid acyl-CoA ligase, and acetyl-CoA carboxylase were up-regulated under urea cultivation, contributing to the extension and unsaturated bond formation. These findings indicated that regulation of the specific genes through nitrogen source could greatly stimulate n-3 PUFA production in Thraustochytriidae sp.
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Sehl, Anthony, Emma Caderby, Sammy Bouhouda, Fabrice Rébeillé, Hywel Griffiths, and Sonia Da Rocha Gomes. "How do algae oils change the omega-3 polyunsaturated fatty acids market?" OCL 29 (2022): 20. http://dx.doi.org/10.1051/ocl/2022018.
Повний текст джерелаАнотація:
The health benefits of a diet rich in omega-3 long chain polyunsaturated fatty acids (n-3 LC-PUFA) no longer need to be proven. However, while health authorities attempt to increase the consumption of the n-3 LC-PUFAs eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), data from the latest intake surveys demonstrate that EPA and DHA consumption is still too low. A push towards greater sustainability, and a rise in vegetarianism are pushing manufacturers to move from traditional fish oils towards alternative sources. Microalgae oils provide a source of n-3 LC-PUFA with a lower environmental impact and are produced using processes that limit damage to the oils. This review aims to report on oleaginous microalgae strains available for n-3 LC-PUFA production, the processes used for their growth and the extraction and refining processes for their oils. It also addresses the challenges inherent in these products and their fabrication, and some of the novel characteristics of microalgal oils, including their very high n-3 LC-PUFA content and the chemical structure of their triglycerides, that lead to exciting opportunities in their use as functional food ingredients.
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Harwood, John. "Algae: Critical Sources of Very Long-Chain Polyunsaturated Fatty Acids." Biomolecules 9, no. 11 (November 6, 2019): 708. http://dx.doi.org/10.3390/biom9110708.
Повний текст джерелаАнотація:
Polyunsaturated fatty acids (PUFAs), which are divided into n-3 and n-6 classes, are essential for good health in humans and many animals. They are metabolised to lipid mediators, such as eicosanoids, resolvins and protectins. Increasing interest has been paid to the 20 or 22 carbon very long chain PUFAs, since these compounds can be used to form lipid mediators and, thus, avoid inefficient formation of dietary plant PUFAs. The ultimate sources of very long chain PUFAs are algae, which are consumed by fish and then by humans. In this review, I describe the biosynthesis of very long chain PUFAs by algae and how this synthesis can be manipulated for commercial purposes. Ultimately, the production of algal oils is critical for ecosystems worldwide, as well as for human dietary lipids.
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Gammone, Maria, Graziano Riccioni, Gaspare Parrinello, and Nicolantonio D’Orazio. "Omega-3 Polyunsaturated Fatty Acids: Benefits and Endpoints in Sport." Nutrients 11, no. 1 (December 27, 2018): 46. http://dx.doi.org/10.3390/nu11010046.
Повний текст джерелаАнотація:
The influence of nutrition has the potential to substantially affect physical function and body metabolism. Particular attention has been focused on omega-3 polyunsaturated fatty acids (n-3 PUFAs), which can be found both in terrestrial features and in the marine world. They are responsible for numerous cellular functions, such as signaling, cell membrane fluidity, and structural maintenance. They also regulate the nervous system, blood pressure, hematic clotting, glucose tolerance, and inflammatory processes, which may be useful in all inflammatory conditions. Animal models and cell-based models show that n-3 PUFAs can influence skeletal muscle metabolism. Furthermore, recent human studies demonstrate that they can influence not only the exercise and the metabolic response of skeletal muscle, but also the functional response for a period of exercise training. In addition, their potential anti-inflammatory and antioxidant activity may provide health benefits and performance improvement especially in those who practice physical activity, due to their increased reactive oxygen production. This review highlights the importance of n-3 PUFAs in our diet, which focuses on their potential healthy effects in sport.
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Akbar, Samina, Muhammad Zeeshan Bhatti, Rida Fatima Saeed, and Asma Saleem Qazi. "Polyunsaturated Fatty Acids: Impact on Health and Disease Status." Life and Science 2, no. 2 (April 2, 2021): 12. http://dx.doi.org/10.37185/lns.1.1.85.
Повний текст джерелаАнотація:
Over the last decades, the polyunsaturated fatty acids (PUFAs) have been largely explored not only for their nutritional value but also for the numerous biological functions and therapeutic effects. The serum and erythrocyte levels of PUFAs depend on the genetic control of metabolism as well as the dietary intake and are considered to reflect the health and disease status of an individual. Two families of PUFAs, omega-3 (n-3) and omega-6 (n-6), have gained much attention because of their involvement in the production of bioactive lipid mediators and therefore, a balanced omega-6/omega-3 ratio is crucial in maintaining the overall health of an individual. Omega-3 PUFAs, notably eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoic acid (DHA, 22:6n-3) have been shown to exert beneficial effects, possibly due to their lipid-lowering, anti-inflammatory, anti-hypertensive and cardioprotective effects, whereas omega-6 fatty acids such as arachidonic acid (ARA, 20:4n-6) exhibit the opposite properties. Even though, numerous epidemiological studies and clinical interventions have clearly established the effectiveness of omega-3 PUFAs in various pathological conditions including dyslipidemia, obesity, diabetes, cancer, cardiovascular and neurodegenerative diseases, some controversies do exist about the beneficial effects of omega-3 PUFAs and need to be clarified. Larger clinical trials with extended follow-up periods are required along with a careful dose selection, in order to confirm the clinical significance and efficacy of omega-3 PUFAs as therapeutic agents.
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Cheng, Gong, Changzhen Fu, Hong Wang, C. Adoligbe, Shengjuan Wei, Shijun Li, Bijie Jiang, Hongbao Wang, and Linsen Zan. "Production of transgenic beef cattle rich in n-3 PUFAs by somatic cell nuclear transfer." Biotechnology Letters 37, no. 8 (May 10, 2015): 1565–71. http://dx.doi.org/10.1007/s10529-015-1827-z.
Повний текст джерела
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PEREIRA, Suzette L., Yung-Sheng HUANG, Emil G. BOBIK, Anthony J. KINNEY, Kevin L. STECCA, Jeremy C. L. PACKER, and Pradip MUKERJI. "A novel omega3-fatty acid desaturase involved in the biosynthesis of eicosapentaenoic acid." Biochemical Journal 378, no. 2 (March 1, 2004): 665–71. http://dx.doi.org/10.1042/bj20031319.
Повний текст джерелаАнотація:
Long-chain n−3 PUFAs (polyunsaturated fatty acids) such as EPA (eicosapentaenoic acid; 20:5n−3) have important therapeutic and nutritional benefits in humans. In plants, cyanobacteria and nematodes, ω3-desaturases catalyse the formation of these n−3 fatty acids from n−6 fatty acid precursors. Here we describe the isolation and characterization of a gene (sdd17) derived from an EPA-rich fungus, Saprolegnia diclina, that encodes a novel ω3-desaturase. This gene was isolated by PCR amplification of an S. diclina cDNA library using oligonucleotide primers corresponding to conserved regions of known ω3-desaturases. Expression of this gene in Saccharomyces cerevisiae, in the presence of various fatty acid substrates, revealed that the recombinant protein could exclusively desaturate 20-carbon n−6 fatty acid substrates with a distinct preference for ARA (arachidonic acid; 20:4n−6), converting it into EPA. This activity differs from that of the known ω3-desaturases from any organism. Plant and cyanobacterial ω3-desaturases exclusively desaturate 18-carbon n−6 PUFAs, and a Caenorhabditis elegans ω3-desaturase preferentially desaturated 18-carbon PUFAs over 20-carbon substrates, and could not convert ARA into EPA when expressed in yeast. The sdd17-encoded desaturase was also functional in transgenic somatic soya bean embryos, resulting in the production of EPA from exogenously supplied ARA, thus demonstrating its potential for use in the production of EPA in transgenic oilseed crops.
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Sobczuk-Szul, Monika, Magdalena Mochol, Zenon Nogalski, Paulina Pogorzelska-Przybyłek, and Martyna Momot. "Fattening of Polish Holstein-Friesian × Limousin Bulls under Two Production Systems and Its Effect on the Fatty Acid Profiles of Different Fat Depots." Animals 11, no. 11 (October 28, 2021): 3078. http://dx.doi.org/10.3390/ani11113078.
Повний текст джерелаАнотація:
This study was designed to compare the fatty acid (FA) profiles of four types of fat depots from crossbred bulls (Polish Holstein-Friesian × Limousin, PHF × LM) fattened semi-intensively (SI) and intensively (I). Intramuscular fat was most abundant in total polyunsaturated fatty acids (PUFAs), n-3 and n-6 PUFAs, and functional fatty acids C 18:2, C 18:3, C 20:4 and C 20:5 in comparison with the remaining fat types. Furthermore, note that external fat was more abundant in conjugated linoleic acid (CLA) than other fat types. Grass silage fed to cattle during fattening had a beneficial influence on the FA profile of beef, and an increase in the amount of concentrate in the ration did not decrease beef quality.
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Manaig, Yron Joseph Yabut, Silvia Sandrini, Sara Panseri, Gabriella Tedeschi, Josep M. Folch, Armand Sánchez, Giovanni Savoini, and Alessandro Agazzi. "Low n-6/n-3 Gestation and Lactation Diets Influence Early Performance, Muscle and Adipose Polyunsaturated Fatty Acid Content and Deposition, and Relative Abundance of Proteins in Suckling Piglets." Molecules 27, no. 9 (May 4, 2022): 2925. http://dx.doi.org/10.3390/molecules27092925.
Повний текст джерелаАнотація:
Elevated omega-6 (n-6) and omega-3 (n-3) polyunsaturated fatty acids (PUFAs) ratios in swine diets can potentially impose a higher risk of inflammatory and metabolic diseases in swine. A low ratio between the two omega PUFAs has beneficial effects on sows’ and piglets’ production performance and immunity status. At present, there are few studies on how sow nutrition directly affects the protein and fat deposition in suckling piglets. Two groups of sows were fed diets with high or low n-6/n-3 polyunsaturated ratios of 13:1 (SOY) and 4:1 (LIN), respectively, during gestation and lactation. Longissimus dorsi muscle and adipose tissue from newborn piglets, nourished only with sow’s milk, were subjected to fatty acid profiling by gas chromatography–mass spectrometry (GC-MS) and to proteomics assays based on nano-liquid chromatography coupled to high-resolution tandem mass spectrometry (nLC-HRMS). Fatty acid profiles on both muscle and adipose tissues resembled the magnitude of the differences between fatty acid across diets. Proteomic analysis revealed overabundance of 4 muscle and 11 adipose tissue proteins in SOY compared to LIN in both piglet tissues. The detected overabundance of haptoglobin, an acute-phase protein, and the stimulation of protein-coding genes and proteins related to the innate immune response and acute inflammatory response could be associated with the pro-inflammatory role of n-6 PUFAs.
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Collodel, Giulia, Elena Moretti, Daria Noto, Francesca Iacoponi, and Cinzia Signorini. "Fatty Acid Profile and Metabolism Are Related to Human Sperm Parameters and Are Relevant in Idiopathic Infertility and Varicocele." Mediators of Inflammation 2020 (August 31, 2020): 1–13. http://dx.doi.org/10.1155/2020/3640450.
Повний текст джерелаАнотація:
Objectives. Fatty acids (FA) modulate oxidative stress, reactive oxygen species (ROS) production, and inflammatory processes in spermatogenesis. Methods. The amount of 17 different FAs and the level of F2-isoprostanes (F2-IsoPs) and cytoplasmic phospholipase A2 (cPLA2) were compared and correlated to sperm characteristics; these last ones were evaluated by light and electronic microscopy in varicocele and idiopathic infertile patients. Results. Total n-3 polyunsaturated acids (PUFAs) and docosahexaenoic acid (DHA), one of the n-3 PUFAs, were significantly reduced in idiopathic infertile men compared to controls (P<0.05). In the whole studied population, oleic acid and total monounsaturated acids (MUFAs) correlated negatively with sperm concentration, progressive motility, normal morphology, vitality, and fertility index and positively with sperm necrosis. Eicosapentaenoic acid (EPA) amount was positively correlated with the percentage of sperm necrosis and cPLA2 level and negatively with sperm concentration. Sperm vitality was negatively correlated with the saturated fatty acids (SFAs). In infertile groups, cPLA2 was negatively correlated with DHA and n-3 PUFAs (both P<0.05) and positively with EPA (P<0.05). In the varicocele group, sperm vitality was negatively correlated with palmitoleic acid and total n-6 PUFAs (P<0.05); sperm apoptosis was positively correlated with the total SFA percentage (P<0.05). Conclusions. FA composition in sperm membrane and the metabolism of sperm FAs are interrelated parameters, both relevant in sperm maturation processes and fertility.
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Jones, Megan L., Peter J. Mark, and Brendan J. Waddell. "Maternal omega-3 fatty acid intake increases placental labyrinthine antioxidant capacity but does not protect against fetal growth restriction induced by placental ischaemia–reperfusion injury." REPRODUCTION 146, no. 6 (December 2013): 539–47. http://dx.doi.org/10.1530/rep-13-0282.
Повний текст джерелаАнотація:
Placental oxidative stress plays a key role in the pathophysiology of several placenta-related disorders. Oxidative stress occurs when excess reactive oxygen species (ROS) damages cellular components, an outcome limited by antioxidant enzymes; mitochondrial uncoupling protein 2 (UCP2) also limits ROS production. We recently reported that maternal dietary omega-3 polyunsaturated fatty acid (n-3 PUFA) supplementation reduced placental oxidative damage and enhanced fetal and placental growth in the rats. Here, we examined the effect of n-3 PUFAs on placental antioxidant defences and whether n-3 PUFA supplementation could prevent growth restriction induced by placental ischaemia–reperfusion (IR), a known inducer of oxidative stress. Rats were fed either standard or high-n-3 PUFA diets from day 1 of pregnancy. Placentas were collected on days 17 and 22 in untreated pregnancies (term=day 23) and at day 22 following IR treatment on day 17. Expression of several antioxidant enzyme genes (Sod1,Sod2,Sod3,Cat,Txn1andGpx3) andUcp2was measured by quantitative RT-PCR in the placental labyrinth zone (LZ) and junctional zone (JZ). Cytosolic superoxide dismutase (SOD), mitochondrial SOD and catalase (CAT) activities were also analyzed. Maternal n-3 PUFA supplementation increased LZ mRNA expression ofCatat both gestational days (2- and 1.5-fold respectively;P<0.01) and femaleSod2at day 22 (1.4-fold,P<0.01). Cytosolic SOD activity increased with n-3 PUFA supplementation at day 22 (1.3-fold,P<0.05).Sod1andTxn1expression decreased marginally (30 and 22%,P<0.05). JZ antioxidant defences were largely unaffected by diet. Despite increased LZ antioxidant defences, maternal n-3 PUFA supplementation did not protect against placental IR-induced growth restriction of the fetus and placental LZ.
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Mierliță, D. "Fatty acid profile and oxidative stability of egg yolks from hens under different production systems." South African Journal of Animal Science 50, no. 2 (June 30, 2020): 196–206. http://dx.doi.org/10.4314/sajas.v50i2.3.
Повний текст джерелаАнотація:
AbstractThis study was carried out to compare the egg quality, fatty acid (FA) profiles, and oxidative stability of yolks from hens maintained in cages and fed a conventional diet (CON), those fed a conventional diet with free access to outdoor grassy area (5 m2/hens) under free-range conditions (FR), and those fed an organic diet and free access to outdoor grassy area (10 m2/hens) under in organic system (ORG). Heavier eggs were produced by CON, while percentages of yolk and eggshell were greater in eggs of FR and ORG hens. The FR and ORG hens produced eggs that contained significantly more monounsaturated fatty acids (MUFAs) but less polyunsaturated fatty acids (PUFAs) than CON hens. Eggs from FR and ORG hens had a lower concentration of PUFA n-6 because of less C18:2 n-6 (linoleic acid) and a higher percentage of PUFA n-3 (eicosapentaenoic acid). Consequently, the ratio of PUFA n-6 to n-3 for eggs from FR and ORG hens was healthier for consumers compared with CON. However, eggs from the ORG hens had a similar FA profile to those from the FR hens. No significant differences were noted in hypocholesterolaemic (HI), atherogenic (AI) and thrombogenic indexes. Antioxidant concentration was greatest in eggs from ORG hens (retinol-14.32 μg/g and α-tocopherol-98.7 μg/g/yolk). Thus, the oxidative stability of eggs measured after storage at 4°Cfor 15 or 30 days was improved. The best eggs in terms of nutritional value were from the ORG system in which hens lived in their natural environment.
Keywords: antioxidants, conventional production, egg quality, free range production, malonaldehyde, organic production
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Duan, Suhu, Zaiqiang Li, Zhenzhen Fan, Mengran Qin, Xiaoxue Yu, and Liuan Li. "Effects of Dietary Addition of Linseed Oil on the Content of Polyunsaturated Fatty Acids in Egg Yolk of Gallus domestiaus." Journal of Biobased Materials and Bioenergy 15, no. 4 (August 1, 2021): 565–70. http://dx.doi.org/10.1166/jbmb.2021.2089.
Повний текст джерелаАнотація:
In order to study the effect of dietary supplement of linseed oil on polyunsaturated fatty acids (PUFAs) in egg yolk of Gallus domestiaus, total 160 healthy Gallus domestiaus of 26-week old were randomly selected and divided into 4 groups, each of which included 40 chickens fed outdoors with an area of 63 m2 and free food and drinking water. The control group (CK) was fed the basic diet, and the experimental group was added 1, 3 and 5% of linseed oil in the fundamentals of diet (experimental group 1, 2 and 3, abbreviated as P1, P2, P3), respectively. The content of PUFA and the value of n-6 PUFA and n-3 PUFA in egg yolk were determined by gas chromatography with 24 eggs randomly selected in each group after 10th, 25th and 40th days of the commence of the experiment. We found that the levels of α-linolenic acid (C18:3n3, ALA) and docosahexaenoic acid (C22:6n3, DHA) in egg yolk were clearly higher than the CK when 3% linseed oil or 5% linseed oil were added in the diet during the three experiment periods, in which the contents of linoleic Acid (18:2n6c, LA) and arachidonic acid (C20:4n6, ARA) in egg yolk differ little between P1, P2 and P3 and the CK while the value of n-6 PUFA and n-3 PUFA in egg yolk of the P2 and P3 groups decreased significantly. The comprehensive comparisons suggested that the content of C18:3n3 and C22:6n3 in egg yolk could be clearly increased in the P2 while the value of n-6 PUFA and n-3 PUFA decreased. This study provides theoretical basis for the production of functional eggs enriched with C22:6n3 and C18:3n3.
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Cheng, Z., RS Robinson, PG Pushpakumara, RJ Mansbridge, and DC Wathes. "Effect of dietary polyunsaturated fatty acids on uterine prostaglandin synthesis in the cow." Journal of Endocrinology 171, no. 3 (December 1, 2001): 463–73. http://dx.doi.org/10.1677/joe.0.1710463.
Повний текст джерелаАнотація:
Dietary polyunsaturated fatty acid (PUFA) intake in humans can affect the incidence of a variety of diseases including coronary heart disease. Feeding high PUFA diets to cows can alter the PUFA content of milk for human consumption. PUFAs supply the precursors for prostaglandin (PG) synthesis and PGs in turn influence many aspects of reproduction. This study examined the effects of a control (CONT), a high n-6 PUFA diet (derived from protected soya) and a high n-3 diet (derived from protected linseed) on uterine PG synthesis in the lactating dairy cow. Endometrial explants obtained on days 15-17 of the oestrous cycle were cultured for an initial 42 h in vitro in fully defined medium (basal production) and then challenged with control medium, oxytocin (OT; 20 or 200 nM) or calcium ionophore A23187 (CaI; 10 microM). PGF(2 alpha), PGE(2) and 6-keto-PGF(1 alpha) were measured in the spent medium. The experiments were repeated using tissue from two groups of cows, nine in Experiment 1 (three cows per diet) and seven in Experiment 2 (four CONT and three n-6). Results of the two experiments were consistent. The basal concentrations of all three PGs were significantly lower (>50% reduction) in the n-6-fed group in comparison with CONT and n-3 groups. The n-3 diet did not alter basal PGF(2 alpha) and PGE(2) but increased 6-keto-PGF(1 alpha). The n-6 diet also inhibited the ability of the tissue to respond to both OT and CaI, with significant reductions in the stimulated levels of all three PGs. In contrast, the n-3 diet only had minor effects; it did not alter the response to OT but did reduce the long-term response to CaI at 24 h post treatment. In conclusion, dietary PUFA intake can inhibit PG production in bovine endometrial explants, with a more pronounced effect following n-6 rather than n-3 supplementation. These data suggest that a high n-6 diet reduces the endometrial capacity to produce PGs and may therefore have implications for the control of luteolysis and other PG-mediated events such as ovulation.
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Symington, Elizabeth A., and Gerda J. Gericke. "The role of long-chain polyunsaturated fatty acids in the treatment of cancer Cachexia and tumour growth in patients with malignant diseases: A review." Health SA Gesondheid 13, no. 2 (November 18, 2008): 49–60. http://dx.doi.org/10.4102/hsag.v13i2.279.
Повний текст джерелаАнотація:
Recent studies show that ω-3 polyunsaturated fatty acids (PUFAs) have the capacity to modulate cancer outcomes. The body responds to cancer in the same way that it responds to inflammation and wound healing. Nutrients with anti-inflammatory effects could therefore be expected to play a role in cancer treatment. This review focuses on the role of ω-3 PUFAs in tumourigenesis and cancer cachexia. Studies indicate that eicosapentaenoic acid (EPA) supplementation may promote arrest of tumour growth and reduce cell proliferation. Patients need to consume at least 2 g of EPA per day for it to have a therapeutic effect. Positive outcomes related to cachexia include diminished weight loss, increased appetite, improved quality of life and prolonged survival, although there is controversy regarding these clinical outcomes. The effects of ω-3 PUFAs on tumourigenesis and cachexia are viewed in the context of altered lipid and protein metabolism. This altered metabolism usually experienced by cancer patients results in increased formation of proinflammatory eicosanoids and cytokines. Cytokines play an indirect role by stimulating the production of arachidonic acid-derived eicosanoids, which support inflammation, cell proliferation and angiogenesis, and inhibit apoptosis. It can be concluded that ω-3 PUFA supplementation offers a means of augmenting cancer therapy, inhibiting tumourigenesis and possibly contributing to cachexia alleviation.
Opsomming
Onlangse studies toon dat ω-3-poli-onversadigde vetsure (POVSe) oor die vermoë beskik om kankeruitkomste te moduleer. Die liggaam reageer op kanker op dieselfde wyse as wat dit op inflammasie en wondgenesing reageer. Daar kan dus verwag word dat voedingstowwe met ‘n anti-inflammatoriese uitwerking ‘n rol in die behandeling van kanker kan speel. In hierdie oorsig word daar op die rol van ω-3-POVSe in tumorigenese en kankerkageksie gefokus. Studies dui daarop dat eikosapentanoënsuur- (EPS-)aanvulling tumorgroei moontlik kan stuit en selproliferasie verlaag. Pasiënte moet minstens 2 g EPS per dag inneem om ‘n terapeutiese uitwerking te verseker. Positiewe uitkomste verbonde aan kageksie sluit minder gewigsverlies, beter eetlus, beter lewensgehalte en langer oorlewing in, hoewel daar ‘n geskil bestaan oor hierdie kliniese uitkomste. Die uitwerking van ω-3-POVSe op tumorigenese en kageksie word in die konteks van gewysigde lipied- en proteïenmetabolisme beskou. Die metabolisme wat dikwels in kankerpasiënte voorkom, lei tot ‘n verhoogde vorming van pro-inflammatoriese eikosanoïede en sitokiene. Sitokiene speel ook ‘n indirekte rol deur die produksie van aragidoonsuur-afkomstige eikosanoïede te stimuleer. Laasgenoemde ondersteun inflammasie, selproliferasie en angiogenese, en inhibeer apoptose. Die gevolgtrekking kan gemaak word dat ω-3-POVS-aanvulling ‘n manier is om kankerterapie uit te brei, tumorigenese te inhibeer en moontlik tot die verligting van kageksie by te dra.
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Rossary, Adrien, Khelifa Arab, and Jean-Paul Steghens. "Polyunsaturated fatty acids modulate NOX 4 anion superoxide production in human fibroblasts." Biochemical Journal 406, no. 1 (July 26, 2007): 77–83. http://dx.doi.org/10.1042/bj20061009.
Повний текст джерелаАнотація:
The strong ROS (reactive oxygen species) production, part of an antioxidant response of human fibroblasts triggered by DHA (docosahexaenoic acid; C22:6,n−3), served as a model for deciphering the relative contribution of NOX (NADPH oxidase) to ROS production, as the role of this enzymatic system remains controversial. Using hydroxyethidium fluorescence for fibroblast ROS production, RT (reverse transcriptase)–PCR for NOX 4 mRNA quantification and mRNA silencing, we show that ROS production evolves in parallel with the catalytic activity of NOX and is suppressed by siNOX 4 (small interference oligonucleotide RNA directed against NOX 4) silencing. Apocynin and plumbagin, specific inhibitors of NOX, prevent ROS production in this cellular model and confirm the role of NOX 4 for this production. Furthermore, we show that, in cell lysates, NOX 4 activity can be modulated by PUFAs (polyunsaturated fatty acids) at the micromolar level in the presence of calcium: NOX 4 activity is increased by arachidonic acid (C20:4,n−6) (∼175% of the control), and conjugated linoleic acid (C18:2 [9Z,11E]) is a potent inhibitor (50% of the control). Unexpectedly, intracellular superoxide dismutase does not participate in the modulation of this ROS production and the opposite effects of some PUFAs, described in our experiments, could suggest another way of regulating NOX activity.
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Araki, Yoshiro, Miho Matsumiya, Takashi Matsuura, Masaharu Oishi, Masaki Kaibori, Tadayoshi Okumura, Mikio Nishizawa, Hideho Takada, and A.-Hon Kwon. "Peroxidation of n-3 Polyunsaturated Fatty Acids Inhibits the Induction of iNOS Gene Expression in Proinflammatory Cytokine-Stimulated Hepatocytes." Journal of Nutrition and Metabolism 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/374542.
Повний текст джерелаАнотація:
Eicosapentaenoic acid and docosahexaenoic acid (EPA/DHA), n-3 polyunsaturated fatty acids (PUFAs), have a variety of biological activities including anti-inflammatory and anticancer effects. We hypothesized that their peroxidized products contributed in part to anti-inflammatory effects. In the liver, the production of nitric oxide (NO) by inducible nitric oxide synthase (iNOS) has been implicated as one of the factors in hepatic inflammation and injury. We examined whether the peroxidation of EPA/DHA influences the induction of iNOS and NO production in proinflammatory cytokine-stimulated cultured hepatocytes, which isin vitroliver inflammation model. Peroxidized EPA/DHA inhibited the induction of iNOS and NO production in parallel with the increased levels of their peroxidation, whereas unoxidized EPA/DHA had no effects at all. Peroxidized EPA/DHA reduced the activation of transcription factor, NF-κB, and the expression of the iNOS antisense transcript, which are involved in iNOS promoter transactivation (mRNA synthesis) and its mRNA stabilization, respectively. These findings demonstrated that peroxidized products of EPA/DHA suppressed the induction of iNOS gene expression through both of the transcriptional and posttranscriptional steps, leading to the prevention of hepatic inflammation.
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Rodrigo, Ramón, Juan C. Prieto, and Rodrigo Castillo. "Cardioprotection against ischaemia/reperfusion by vitamins C and E plus n−3 fatty acids: molecular mechanisms and potential clinical applications." Clinical Science 124, no. 1 (September 7, 2012): 1–15. http://dx.doi.org/10.1042/cs20110663.
Повний текст джерелаАнотація:
The role of oxidative stress in ischaemic heart disease has been thoroughly investigated in humans. Increased levels of ROS (reactive oxygen species) and RNS (reactive nitrogen species) have been demonstrated during ischaemia and post-ischaemic reperfusion in humans. Depending on their concentrations, these reactive species can act either as benevolent molecules that promote cell survival (at low-to-moderate concentrations) or can induce irreversible cellular damage and death (at high concentrations). Although high ROS levels can induce NF-κB (nuclear factor κB) activation, inflammation, apoptosis or necrosis, low-to-moderate levels can enhance the antioxidant response, via Nrf2 (nuclear factor-erythroid 2-related factor 2) activation. However, a clear definition of these concentration thresholds remains to be established. Although a number of experimental studies have demonstrated that oxidative stress plays a major role in heart ischaemia/reperfusion pathophysiology, controlled clinical trials have failed to prove the efficacy of antioxidants in acute or long-term treatments of ischaemic heart disease. Oral doses of vitamin C are not sufficient to promote ROS scavenging and only down-regulate their production via NADPH oxidase, a biological effect shared by vitamin E to abrogate oxidative stress. However, infusion of vitamin C at doses high enough to achieve plasma levels of 10 mmol/l should prevent superoxide production and the pathophysiological cascade of deleterious heart effects. In turn, n−3 PUFA (polyunsaturated fatty acid) exposure leads to enhanced activity of antioxidant enzymes. In the present review, we present evidence to support the molecular basis for a novel pharmacological strategy using these antioxidant vitamins plus n−3 PUFAs for cardioprotection in clinical settings, such as post-operative atrial fibrillation, percutaneous coronary intervention following acute myocardial infarction and other events that are associated with ischaemia/reperfusion.
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Pogorzelska-Przybyłek, Paulina, Zenon Nogalski, Monika Sobczuk-Szul, Cezary Purwin, and Dorota Kubiak. "Carcass characteristics and meat quality of Holstein-Friesian × Hereford cattle of different sex categories and slaughter ages." Archives Animal Breeding 61, no. 2 (June 28, 2018): 253–61. http://dx.doi.org/10.5194/aab-61-253-2018.
Повний текст джерелаАнотація:
Abstract. When dairy cattle production predominates, the quantity and quality of beef can be increased through commercial crossing of beef bulls with dairy cows and creating herds for the purpose of beef production. This experiment was conducted to compare carcass traits in young bulls and steers, produced by crossing Holstein-Friesian (HF) cows with Hereford (HH) bulls and slaughtered at 15 and 18 months of age. One half of 32 young bulls were castrated at 2 or 3 weeks of age. Starting at 7 months of age, they received grass silage supplemented with concentrates. At the end of the fattening period, the animals were slaughtered, carcass quality and the quality of meat from m. longissimus thoracis were evaluated. It was found that unlike steers, bulls can be slaughtered at a later age because their carcass traits improved over time and carcass fat content increased only insignificantly. Meat from steers had higher intramuscular fat content (1.20 and 2.35 % in bulls and steers slaughtered at 15 months of age, respectively; 1.89 and 3.79 % in bulls and steers slaughtered at 18 months of age, respectively), it was tenderer and juicier than meat from bulls, and its sensory quality improved with age. The intramuscular fat (IMF) of steers was characterized by a more desirable n-6 ∕ n-3 polyunsaturated fatty acid (PUFA) ratio, whereas the IMF of bulls had higher concentrations of conjugated linoleic acid and n-3 PUFAs. Beef from steers is a good choice for consumers who appreciate high-quality meat. The results of this study may encourage producers to raise steers for beef.
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Saenz de Viteri, Manuel, María Hernandez, Valentina Bilbao-Malavé, Patricia Fernandez-Robredo, Jorge González-Zamora, Laura Garcia-Garcia, Nahia Ispizua, Sergio Recalde, and Alfredo Garcia-Layana. "A Higher Proportion of Eicosapentaenoic Acid (EPA) When Combined with Docosahexaenoic Acid (DHA) in Omega-3 Dietary Supplements Provides Higher Antioxidant Effects in Human Retinal Cells." Antioxidants 9, no. 9 (September 4, 2020): 828. http://dx.doi.org/10.3390/antiox9090828.
Повний текст джерелаАнотація:
Retinal pigment epithelium (RPE) is a key regulator of retinal function and is directly related to the transport, delivery, and metabolism of long-chain n-3 polyunsaturated fatty acids (n3-PUFA), in the retina. Due to their functions and location, RPE cells are constantly exposed to oxidative stress. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) have shown to have antioxidant effects by different mechanisms. For this reason, we designed an in vitro study to compare 10 formulations of DHA and EPA supplements from different origins and combined in different proportions, evaluating their effect on cell viability, cell proliferation, reactive oxygen species production, and cell migration using ARPE-19 cells. Furthermore, we assessed their ability to rescue RPE cells from the oxidative conditions seen in diabetic retinopathy. Our results showed that the different formulations of n3-PUFAs have a beneficial effect on cell viability and proliferation and are able to restore oxidative induced RPE damage. We observed that the n3-PUFA provided different results alone or combined in the same supplement. When combined, the best results were obtained in formulations that included a higher proportion of EPA than DHA. Moreover, n3-PUFA in the form of ethyl-esters had a worse performance when compared with triglycerides or phospholipid based formulations.
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Ghnaimawi, Saeed, Jamie Baum, Rohana Liyanage, and Yan Huang. "PSII-23 Concurrent supplementation of n-3 polyunsaturated fatty acids impairs C2C12 from the acquisition of functional brown adipocyte phenotype by negatively affecting the mitochondrial thermogenesis." Journal of Animal Science 97, Supplement_3 (December 2019): 242. http://dx.doi.org/10.1093/jas/skz258.492.
Повний текст джерелаАнотація:
Abstract Regarding the beneficial roles in fetal neurodevelopment, n-3 polyunsaturated fatty acids (PUFAs) are wildly used as dietary supplements during pregnancy. However, it may affect fetal and offspring muscle development and energy balance by changing the levels of key proteins controlling lipid metabolism and energy utilization. Regulation of energy balance in vivo is a topic of great interest and prominent goal for many studies. In this study, we focus on the effect of EPA and DHA on C2C12 brown adipogenic capacity. We demonstrated that the differentiation route of C2C12 into brown adipocytes was compromised by PUFA treatment through reducing their thermogenesis independent of UCP1 gene. This effect might be in part due to down-regulation of the expression of some brown adipocytes specific genes such as CP-3, DIO2, and PGC1α. Moreover, members of complex ІV (COX7a1 and COX8b) and complex V (ATP5j2) regulating ECT function were reduced in PUFA treated group. Also, mitochondrial biogenesis related genes including PGC1α, PGC1β, TFAM, and ERR-a were significantly suppressed by PUFA treatment. The mass spectrometric evaluation exhibited a strong correlation between PUFA treatment and the decreasing of levels of the proteins regulate Krebs cycle and ETC, such as ATP synthase α and β (F1F0 complex), citrate synthase, succinate CO-A, aconitate hydratase, and cytochrome c. Genomic and proteomic changes were accompanied by mitochondrial dysfunction represented by reducing oxygen consumption rate, ATP production, and proton leak (All statistically different at P < 0.05). In line with that, our results demonstrated an increase in lipid droplets size and number. EPA and DHA associated inhibition of the acquisition of functional brown adipocytes might negatively affect factor in the neonatal thermoregulation but potentially increase the intramuscular adipogenesis.
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Asimakopoulou, Georgia, Anthi Karnaouri, Savvas Staikos, Stylianos D. Stefanidis, Konstantinos G. Kalogiannis, Angelos A. Lappas, and Evangelos Topakas. "Production of Omega-3 Fatty Acids from the Microalga Crypthecodinium cohnii by Utilizing Both Pentose and Hexose Sugars from Agricultural Residues." Fermentation 7, no. 4 (October 8, 2021): 219. http://dx.doi.org/10.3390/fermentation7040219.
Повний текст джерелаАнотація:
The core objective of this work was to take advantage of the unexploited wheat straw biomass, currently considered as a broadly available waste stream from the Greek agricultural sector, towards the integrated valorization of sugar streams for the microbial production of polyunsaturated omega-3 fatty acids (PUFAs). The OxiOrganosolv pretreatment process was applied using acetone and ethanol as organic solvents without any additional catalyst. The results proved that both cellulose-rich solid pulp and hemicellulosic oligosaccharides-rich aqueous liquid fraction after pretreatment can be efficiently hydrolyzed enzymatically, thus resulting in high yields of fermentable monosaccharides. The latter were supplied as carbon sources to the heterotrophic microalga Crypthecodinium cohnii for the production of PUFAs, more specifically docosahexaenoic acid (DHA). The solid fractions consisted mainly of hexose sugars and led to higher DHA productivity than their pentose-rich liquid counterparts, which can be attributed to the different carbon source and C/N ratio in the two streams. The best performance was obtained with the solid pulp pretreated with ethanol at 160 °C for 120 min and an O2 pressure of 16 bar. The total fatty acids content reached 70.3 wt% of dried cell biomass, of which 32.2% was DHA. The total DHA produced was 7.1 mg per g of untreated wheat straw biomass.
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Wei, D., J. Li, M. Shen, W. Jia, N. Chen, T. Chen, D. Su, et al. "Cellular Production of n-3 PUFAs and Reduction of n-6-to-n-3 Ratios in the Pancreatic -Cells and Islets Enhance Insulin Secretion and Confer Protection Against Cytokine-Induced Cell Death." Diabetes 59, no. 2 (November 23, 2009): 471–78. http://dx.doi.org/10.2337/db09-0284.
Повний текст джерела
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Angriani, Nisfi, Suradi Suradi, and Yusup Subagio. "Effects of Omega-3 Polyunsaturated Fatty Acids to The Serum Level of Interleukin-8, Percentage of Forced Expiratory Volume in 1 Second (%FEV1), and COPD Assesment Test Scores in Stable COPD Patients." Jurnal Respirologi Indonesia 37, no. 4 (October 17, 2017): 265–77. http://dx.doi.org/10.36497/jri.v37i4.80.
Повний текст джерелаАнотація:
Backgorund: Cigarette smoke inhalation and the other exposure can cause of airway inflammatory and it was the most cause of chronic obstruction pulmonary desease (COPD) pathogenesis. The airway inflammatory will release cytokines proinflammation, one of them was interleukin (IL)-8. Omega-3 polyunsaturated fatty acids (PUFA) have anti-inflammatory effect and its can decrease cytokines production in COPD pathogenesis.
Methods: This study aimed to analyze effects of omega 3 PUFAs on serum IL-8, %FEV1, and CAT score in stable COPD patients. Clinical trials of experimental with pretest and posttest designs were conducted of 32 stable COPD patients came to clinic in Dr. Moewardi Hospital Surakarta from December 2016 until February 2017. Samples were taken by consecutive sampling. Subjects were divided into two groups include the treatment group (n=16) received standard COPD therapy omega 3 PUFA 600mg/day and the control group (n=16) received only standard COPD therapy for 28 days.
Results: There were significant difference (P=0.0001) towards decreased of serum IL-8 between treatment group (-3.56+5.32pg/ml) and control group (8.90+9.98pg/ml), increase difference were no significantly of %VEP1 value (P=0.473) between treatment group (7.02+7.17pg/ml) and control group (5.32+5.97pg/ml), decrease difference of CAT scores significantly (P=0.0001) between treatment group (-16.13+3.03pg/ml) and control group (-4.75+4.17pg/ml).
Conclusions: Omega-3 PUFA may decrease airway inflammation with decrease serum IL-8 level significantly, increase of %FEV1 no significantly and improve the clinical symptoms of stable COPD by decreased CAT scores significantly in stable COPD patients. (J Respir Indo. 2017; 37(4): 265-77)
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Zhang, Huijun, Hui Zhao, Youwei Zhang, Yingbin Shen, Hang Su, Jun Jin, Qingzhe Jin, and Xingguo Wang. "Characterization of Positional Distribution of Fatty Acids and Triacylglycerol Molecular Compositions of Marine Fish Oils Rich in Omega-3 Polyunsaturated Fatty Acids." BioMed Research International 2018 (July 10, 2018): 1–10. http://dx.doi.org/10.1155/2018/3529682.
Повний текст джерелаАнотація:
The regiospecific characteristics of n-3 polyunsaturated fatty acids (PUFAs) in triacylglycerol (TAG) significantly affect the physicochemical and physiological properties of marine fish oils. In this study, the TAG molecular species composition and positional distributions of fatty acids were investigated in three marine fish species rich in omega-3 PUFAs (anchovy, tuna, and salmon). The regiospecific distribution of the fatty acids was measured with the allylmagnesium bromide (AMB) degradation method. The TAG compositions were analyzed with HPLC and the TAG molecular species were identified with APCI/MS. DHA was preferentially distributed at the sn-2 position of TAG, whereas EPA was evenly distributed along the glycerol backbone. The combinations of FAs, DDO, EOP, EPS, DSS, OOS, and PPS were the predominant TAG molecular species, and OOP, DOS, and DPoPo were the characteristic TAG molecules in the anchovy, salmon, and tuna, respectively. These data can be used to distinguish other marine fish species. The TAG composition categorized by TCN and ECN showed well-structured distributions, with double or triple peaks. These findings should greatly extend the use of marine fish oils in food production and may significantly affect the future development of the fish oil industry.
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Gravaghi, Claudia, Krista M. D. La Perle, Paul Ogrodwski, Jing X. Kang, Fred Quimby, Martin Lipkin, and Sergio A. Lamprecht. "Cox-2 expression, PGE2 and cytokines production are inhibited by endogenously synthesized n-3 PUFAs in inflamed colon of fat-1 mice." Journal of Nutritional Biochemistry 22, no. 4 (April 2011): 360–65. http://dx.doi.org/10.1016/j.jnutbio.2010.03.003.
Повний текст джерела
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Majdoubi, Fatima-Zahra, Redouane Benhima, Anouar Ouizgane, Sana Farid, Mohammed Droussi, Giulia Guerriero, and Mustapha Hasnaoui. "Ova Fatty Acids Composition and Spawning Performances of Silver Carp, Hypophthalmichthys molitrix (Morocco)." Turkish Journal of Fisheries and Aquatic Sciences 20, no. 12 (November 6, 2020): 879–88. http://dx.doi.org/10.4194/1303-2712-v20_12_04.
Повний текст джерелаАнотація:
The present study is performed in order to determine the relationship between fatty acid (FA) profile of silver carp (Hypophthalmichthys molitrix) eggs and fertilization success, embryos viability and larval production. Mature unfertilized ova were collected during the reproductive season from 23 mature and healthy females, reared in Deroua fish farm (Morocco). Total lipids were extracted from ova sample and subjected to trans-esterification then the resulting fatty acids methyl esters were analyzed by gas chromatography tandem mass spectrometry (GC/MS/MS). The results showed that silver carp ova are dominated on total FA by docosahexaenoic acid (DHA) (21.21%) followed by oleic acid (21.07%), palmitic acid (17.71%) and eicosapentaenoic acid (EPA) (10.25%). During the breeding season, polyunsaturateds (PUFAs), monounsaturateds (MUFAs) and saturated fatty acids (SFA) didn’t show any significant difference. Moreover, within the PUFAs, the n-3 series were more abundant than the n-6 series, the total mean was 31.57 ± 1.01% and 5.33 ± 0.32%, respectively. No correlation was between fatty acids and the fertilization success. Maternal weight has effect on the levels of oleic acid (C18:1), arachidonic acid (C20:4) and docosahexaenoic acid (C22:6) in the egg whereas levels of palmetoleic acid (C16:1), eicosapentaenoic acid (C20:5) and docosahexaenoic acid (C22:6) are related to female age.