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1
Han, Sunkyu, Sangbin Jeon y Joonoh Park. "Syntheses of Dimeric Securinega Alkaloids". Synlett 28, n.º 18 (22 de agosto de 2017): 2353–59. http://dx.doi.org/10.1055/s-0036-1590864.
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The isolation of flueggenines A and B by Yue and co-workers in 2006 has triggered a burst of isolation reports of dimeric and oligomeric securinega alkaloid natural products. The compelling molecular structures of these compounds with various modes of connection between monomeric securinega units have posed intriguing challenges to the synthetic organic community. Herein, we have categorized high-order securinega alkaloids based on their biosynthetic mode of dimerization or oligomerization. We then have compiled all reported syntheses of dimeric securinega alkaloids based on our classification.1 Introduction2 Categorization of High-Order Securinega Alkaloid Natural Products3 Syntheses of Type I Dimeric Securinega Alkaloids4 Syntheses of Type II Dimeric Securinega Alkaloids5 Synthesis of Type III Dimeric Securinega Alkaloid6 Conclusion
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Věžník, František, Eva Táborská, Hana Bochořáková, František Tureček, Vladimír Hanuš y Jiří Slavík. "Alkaloids of Papaver nudicaule SUBSP. xanthopetalum (TRAUTV.) FEDDE and P. nudicaule SUBSP. album (REGEL) FEDDE from the section Scapiflora REICHB." Collection of Czechoslovak Chemical Communications 52, n.º 6 (1987): 1634–40. http://dx.doi.org/10.1135/cccc19871634.
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The alkaloidal composition in the two title taxa differs only quantitatively. Both contain amurine as the main alkaloid. P. nudicaule ssp. xanthopetalum contains muramine, protopine and alkaloid PN1 (probably identical with (±)-nudaurine (Ia)) as dominant alkaloids; further were isolated amurensine, epialpinine, cryptopine, mecambridine and alpinigenine. Allocryptopine, papaverrubines A, B, D and G, palmatine and coptisine were detected chromatographically. The quaternary alkaloid fraction afforded cis-N-methylstylopinium hydroxide (as the iodide II) which was isolated for the first time from P. nudicaule. In P. nudicaule ssp. album the alkaloid PN1, epialpinine, amurensine and muramine represented the dominant alkaloids, accompanied with mecambridine, protopine, cryptopine, allocryptopine and alpinigenine. Among the quaternary alkaloids N-methylstylopinium hydroxide was found.
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El-Shazly, Assem. "Pyrrolizidine Alkaloid Profiles of Some Senecio Species from Egypt". Zeitschrift für Naturforschung C 57, n.º 5-6 (1 de junio de 2002): 429–33. http://dx.doi.org/10.1515/znc-2002-5-604.
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Alkaloid profiles of two Egyptian Senecio species (Senecio aegyptius var. discoideus and S. desfontainei) in addition to a cultivated species (S. cineraria) were studied using capillary GLC and GLC-mass spectrometry with respect to pyrrolizidine alkaloids (PAs). Four alkaloids were identified in S. aegyptius var. discoideus, 8 in S. desfontainei and 13 in S. cineraria. Some of these alkaloids have not been reported from these plants. The alkaloidal pattern of different plant organs (flowers, leaves, stem, root) were also investigated. Senecionine has been found to be a one of the major alkaloid in all studied species, it was isolated and its structure was elucidated by 1H- and 13C-NMR.
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El-Shazly, A., A. M. Ateya, L. Witte y M. Wink. "Quinolizidine Alkaloid Profiles of Retama raetam, R. sphaerocarpa and R. monosperma". Zeitschrift für Naturforschung C 51, n.º 5-6 (1 de junio de 1996): 301–8. http://dx.doi.org/10.1515/znc-1996-5-607.
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Abstract About 28 quinolizidine alkaloids and the dipiperidine alkaloids am modendrine, dehydroammodendrine and N -formylammodendrine were identified in the alkaloidal extracts of Retama raetam, Retama sphaerocarpa and Retama monosperma by capillary GLC and GLCMS. Alkaloid profiles of the three Retama species with a Mediterranean distribution are more similar than alkaloid patterns of different organs of the same plant. Whereas sparteine and retamine are the major components of stems, lupanine, retam ine, N-methylcytisine and cytisine dominate in flowers and pods, and cytisine in seeds indicating a high degree of organ specificity of alkaloid storage.
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Slavík, Jiří y Leonora Slavíková. "Alkaloids of Meconopsis cambrica (L.) VIG. and M. robusta HOOK. f. et THOMS." Collection of Czechoslovak Chemical Communications 61, n.º 12 (1996): 1815–22. http://dx.doi.org/10.1135/cccc19961815.
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Additional alkaloids (+)-roemerine (3b), (+)-corytuberine (3d), (-)-N-methylmecambridinium and alkaloid MC 2 (the last two as iodides) were isolated as minor alkaloidal components from Meconopsis cambrica (L.) VIG. (Papaveraceae) besides of the dominant known alkaloids (-)-mecambrine (1), (-)-mecambridine (2), (-)-flavinantine (4) and (+)-magnoflorine (5), and a small amount of (+)-mecambroline (3a). Minute quantities of protopine, allocryptopine, roemeroline, papaverrubine D and C, berberine, coptisine, corysamine and palmatine were identified by thin layer chromatography (TLC). From M. robusta HOOK. f. et THOMS., protopine, (-)-amurensinine (6) and two incompletely characterized alkaloids MRO 1 and MRO 2 were isolated, and allocryptopine, cryptopine, rhoeadine, 6-methoxy-2-methyl-1,2,3,4-tetrahydro-β-carboline, alkaloid MR 1, coptisine, corysamine, magnoflorine, corytuberine and N-methylamurensininium salt were detected on TLC.
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Sreevidya, Narasimhan y Shanta Mehrotra. "Spectrophotometric Method for Estimation of Alkaloids Precipitable with Dragendorff's Reagent in Plant Materials". Journal of AOAC INTERNATIONAL 86, n.º 6 (1 de noviembre de 2003): 1124–27. http://dx.doi.org/10.1093/jaoac/86.6.1124.
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Abstract A rapid, easy, and simple spectrophotometric method was developed for the estimation of total alkaloids precipitated by Dragendorff's reagent (DR) in plant materials. It is based on the formation of yellow bismuth complex in nitric acid medium with thiourea. The yellow-colored complex formed obeys Lambert-Beer's law in the concentration range of 0.06–50 μg/mL with λmax at 435 nm. Using this method, the alkaloidal percentage of certain alkaloids (ajamalicine, papaverine, cinchonine, piperine, berberine) and some plant materials containing alkaloids (Berberis aristata, Solanum nigrum, and Piper longum) were determined. The method was compared with other methods. It can be used for routine analysis of commercial samples by industries dealing with herbal drugs for standardization of plant materials containing alkaloids and for alkaloid-containing pharmaceutical products.
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Lim, Hyeonggeun, Sikwang Seong y Sunkyu Han. "Syntheses of Post-Iboga Alkaloids". Synthesis 51, n.º 14 (19 de febrero de 2019): 2737–58. http://dx.doi.org/10.1055/s-0037-1612061.
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Post-iboga alkaloids are secondary metabolites that are biosynthetically derived from iboga-type alkaloids via rearrangements of the indole and/or isoquinuclidine moieties. Herein, we categorize post-iboga alkaloids into five types based on the biosynthetic mode of transformation of the iboga scaffold. We then describe reported syntheses of post-iboga alkaloids, including our laboratory’s recent contributions, based on our own categorization.1 Introduction1.1 Iboga and Post-Iboga Alkaloids1.2 Classification of Post-Iboga Alkaloids1.2.1 Introduction to Type I Post-Iboga Alkaloids1.2.2 Introduction to Type II Post-Iboga Alkaloids1.2.3 Introduction to Type III Post-Iboga Alkaloids1.2.4 Introduction to Type IV Post-Iboga Alkaloids1.2.5 Introduction to Type V Post-Iboga Alkaloids2 Syntheses of Post-Iboga Alkaloids2.1 Syntheses of Type I Post-Iboga Alkaloids2.1.1 Syntheses of Monomeric Type I Post-Iboga Alkaloids2.1.2 Syntheses of Dimeric Type I Post-Iboga Alkaloids2.2 Syntheses of Type II Post-Iboga Alkaloids2.3 Synthetic Studies Toward Type III Post-Iboga Alkaloids2.4 Syntheses of Type IV Post-Iboga Alkaloids2.5 Synthesis of Type V Post-Iboga Alkaloids3 Conclusion and Outlook
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Wink, M. y L. Witte. "Quinolizidine Alkaloids as Nitrogen Source for Lupin Seedlings and Cell Cultures". Zeitschrift für Naturforschung C 40, n.º 11-12 (1 de octubre de 1985): 767–75. http://dx.doi.org/10.1515/znc-1985-11-1204.
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Abstract The alkaloid patterns during germination and seedling development of Lupinus polyphyllus, L. angustifolius, L. albus, L. pubescens, Cytisus scoparius, Baptisia australis, Spartium junceum and Laburnum anagyroides were studied by capillary glc and EI-MS and CI-MS. The alkaloid contents were relatively high in the seeds and decreased by 20-100% during germination and the early developmental stages. The plants with fully developed leaves were able to synthesize new alkaloids. The decrease of alkaloid concentrations during germination was interpreted in terms of alkaloid turnover and use of the alkaloidal nitrogen for seedling development. The ability of plants to rely on the alkaloidal nitrogen as a nitrogen source could also be shown in lupin cell cultures which could survive and even grow on media which contained sparteine as the sole nitrogen source.
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El-Shazly, Assem, Abdel-Monem M. Ateya y Michael Wink. "Quinolizidine Alkaloid Profiles of Lupinus varius orientalis, L. albus albus, L. hartwegii, and L. densiflorus". Zeitschrift für Naturforschung C 56, n.º 1-2 (1 de febrero de 2001): 21–30. http://dx.doi.org/10.1515/znc-2001-1-204.
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Abstract Alkaloid profiles of two Lupinus species growing naturally in Egypt (L. albus albus [synonym L. term is], L. varius orientalis) in addition to two New World species (L. hartwegii, L. densiflorus) which were cultivated in Egypt were studied by capillary GLC and GLC-mass spectrometry with respect to quinolizidine alkaloids. Altogether 44 quinolizidine, bipiperidyl and proto-indole alkaloids were identified; 29 in L. albus, 13 in L. varius orientalis, 15 in L. hartwegii, 6 in L. densiflorus. Some of these alkaloids were identified for the first time in these plants. The alkaloidal patterns of various plant organs (leaves, flowers, stems, roots, pods and seeds) are documented. Screening for antimicrobial activity of these plant extracts demonstrated substantial activity against Candida albicans, A spergillus flavus and Bacillus subtilis.
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Marsi Mbayo Kitambala, Emery Kalonda Mutombo, Blandine Nkiko Niyibizi, Grégoire Sangwa Kamulete, Glauber Mbayo Kalubandika, Jean Mulamba Muidikija, Evodie Numbi wa Ilunga et al. "The in vitro antisickling effect of purified alkaloids of Cremaspora triflora (Thonn.) K. Schum. (Rubiaceae) and Macaranga schweinfurthii Pax. (Euphorbiaceae)". World Journal of Advanced Research and Reviews 9, n.º 3 (30 de marzo de 2021): 129–37. http://dx.doi.org/10.30574/wjarr.2021.9.3.0074.
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Introduction and objective: Sickle cell disease is an inherited pathology to an abnormality of hemoglobin precisely hemoglobin S for which there is no curative therapy. It mainly affects sub-Saharan African and Caribbean populations. Thus, this study aims to make the phytochemical screening of Cremaspora triflora and Macaranga schweinfurthii as well as to evaluate the antisickling activity of their purified alkaloids. Methodology: Chemical screening was performed using color and precipitation tests as well as the foam index method. The extraction of the alkaloids was carried out with organic solvents in a basic medium while the purification by open column chromatography. The evaluation of the antisickling activity was carried out by Emmel’s test. Results: The chemical screening highlighted alkaloids, steroids, saponins, tannins, and terpenoids in the species studied. Flavonoids and anthocyanins were present in organs of Macaranga schweinfurthii, but absent in Cremaspora triflora. The extraction showed that Macaranga schweinfurthii leaves contained 0.59% alkaloids and 0.73% alkaloids in Cremaspora triflora leaves. The alkaloids purification allowed to obtain an alkaloidal fraction MS1 (1.24 g, 70.05%) from Macaranga schweinfurthii and two fractions [CT2 (0.934 g, 63.97%) and CT3 (0.006 g, 0.41 %)] from Cremaspora triflora which tested positive with Dragendorff and Wagner reagents. The antisickling activity evaluation showed that the SIR varied between 36.00% (0.25 mg/ml) and 90.66% (1 mg/ml) for the alkaloid solutions of Cremaspora triflora (IC50 of 0.51 mg/ml) as well as between 4.00% (0.25 mg/ml) and 33.33% (1 mg/ml) for the alkaloid solutions of Macaranga schweinfurthii (IC50 of 1.40 mg/ml). Conclusion: This study showed that the purified alkaloids of the studied plant species have an inhibitory power on sickling.
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Doncheva, Tsvetelina, Gabriela Yordanova, Vassil Vutov, Nadezhda Kostova y Stefan Philipov. "Comparative Study of Alkaloid Pattern of Four Bulgarian Fumaria Species". Natural Product Communications 11, n.º 2 (febrero de 2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100220.
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The alkaloid pattern of four Fumaria species ( Fumaria kralikii, Fumaria rostellata, Fumaria schleicherii, Fumaria thuretii) growing in Bulgaria was investigated by GC-MS and twenty isoquinoline alkaloids were determined. Phytochemical investigation of the alkaloid composition on Fumaria thuretii Boiss was made for the first time. The alkaloid profile of the species was compared at two levels, between different species and within two species from different habitats. Two chemotypical groups, based on the types of isoquinoline alkaloids were suggested. To group A belong species F. kralikii, F. rostellata (F. r. 1) and F. thuretii containing more than 50% spirobenzylisoquinoline alkaloids of the crude alkaloid mixtures. To group B belong species F. rostellata (F. r. 2) and F. schleicherii containing more than 40% protopine alkaloids and relatively high percentage phthaldeisoquinoline alkaloids (11–19%). In group A phthaldeisoquinoline alkaloids were not detected.
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Dank, Christian, Randy Sanichar, Ken-Loon Choo, Madeline Olsen y Mark Lautens. "Recent Advances Towards Syntheses of Diterpenoid Alkaloids". Synthesis 51, n.º 21 (5 de agosto de 2019): 3915–46. http://dx.doi.org/10.1055/s-0037-1611897.
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The diterpenoid alkaloids serve as a rich source of synthetic targets for organic chemists, due to the intriguing structure of the overlapping ring systems, along with biological activities commonly associated with compounds of this group. Fifteen total syntheses and numerous synthetic studies towards construction of ring fragments have been reported since 2010. This review article gives a brief overview of diterpenoid alkaloids and summarizes the recent synthetic efforts.1 Introduction1.1 Structural Classification and Biosynthetic Origin1.2 Structure Elucidation of the Aconitum Alkaloids2 Total Syntheses2.1 C18-Diterpenoid Alkaloids2.2 C19-Diterpenoid Alkaloids2.3 C20-Diterpenoid Alkaloids3 Strategies To Synthesize Ring Systems3.1 Radical-Based Cyclizations3.2 Ruthenium-Mediated Enyne Cycloisomerization3.3 Reductive Coupling3.4 Diels–Alder Reactions3.5 Oxidative Dearomatization/Diels–Alder Sequence3.6 Transannular Aziridation3.7 Intramolecular [5+2] Cycloaddition3.8 Miscellaneous4 Conclusion
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Namdar, Dvory, Patrick P. J. Mulder, Eyal Ben-Simchon, Yael Hacham, Loai Basheer, Ofer Cohen, Marcelo Sternberg y Oren Shelef. "New Analytical Approach to Quinolizidine Alkaloids and Their Assumed Biosynthesis Pathways in Lupin Seeds". Toxins 16, n.º 3 (21 de marzo de 2024): 163. http://dx.doi.org/10.3390/toxins16030163.
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Alkaloids play an essential role in protecting plants against herbivores. Humans can also benefit from the pharmacological effects of these compounds. Plants produce an immense variety of structurally different alkaloids, including quinolizidine alkaloids, a group of bi-, tri-, and tetracyclic compounds produced by Lupinus species. Various lupin species produce different alkaloid profiles. To study the composition of quinolizidine alkaloids in lupin seeds, we collected 31 populations of two wild species native to Israel, L. pilosus and L. palaestinus, and analyzed their quinolizidine alkaloid contents. Our goal was to study the alkaloid profiles of these two wild species to better understand the challenges and prospective uses of wild lupins. We compared their profiles with those of other commercial and wild lupin species. To this end, a straightforward method for extracting alkaloids from seeds and determining the quinolizidine alkaloid profile by LC–MS/MS was developed and validated in-house. For the quantification of quinolizidine alkaloids, 15 analytical reference standards were used. We used GC–MS to verify and cross-reference the identity of certain alkaloids for which no analytical standards were available. The results enabled further exploration of quinolizidine alkaloid biosynthesis. We reviewed and re-analyzed the suggested quinolizidine alkaloid biosynthesis pathway, including the relationship between the amino acid precursor l-lysine and the different quinolizidine alkaloids occurring in seeds of lupin species. Revealing alkaloid compositions and highlighting some aspects of their formation pathway are important steps in evaluating the use of wild lupins as a novel legume crop.
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O, Archana y Praveen Kumar Nagadesi. "Endophytic, Non-endophytic Fungal Alkaloids and its Applications". Saudi Journal of Pathology and Microbiology 7, n.º 1 (10 de enero de 2022): 4–19. http://dx.doi.org/10.36348/sjpm.2022.v07i01.002.
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Alkaloids are a secondary metabolite, which are extracted from a wide – array of organisms include Bacteria, Fungi, Plants and Animals. Here in present review mainly focused on the alkaloids derived from endophytic fungi and non – endophytic fungi. Fungi have provided a great source of spirit for novel drug compounds as fungi derived alkaloids have done major boon to human health and well - being. In the present review listed 35 different group of alkaloids from endophytes. In which 12 different alkaloids are kept under derivatives of Indole group, 4 different alkaloids are kept under Quinoline group, 4 different alkaloids kept under amines and amide group, from non-endophytic alkaloid 27 different group of alkaloids are reported. In which 9 different type of alkaloid are mentioned under indole group of alkaloids, 4 alkaloids are reported under diketopiperazine alkaloids, 4 different alkaloids are mentioned under ergot group of alkaloids, 3 alkaloids under prenylated indole alkaloids, 3 alkaloids are mentioned under pyridine classes. The main applications of these alkaloids are antimicrobial, Antibacterial, Antifungal, Antiviral Activity Antihelmenthic, Anticancerous, Nutrient Pedaling, Photo stimulation, Endophytes in Tissue Culture Antidiabetic Activity, and Immunosuppressive Activity; hence all the alkaloids should be used as medicines in Ayurvedam. The alkaloids derived from different fungi were reviewed and their uses in medical fields were also report.
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Berkova, Strahil y Rawia Zayed. "Comparison of Tropane Alkaloid Spectra Between Datura innoxia Grown in Egypt and Bulgaria". Zeitschrift für Naturforschung C 59, n.º 3-4 (1 de abril de 2004): 184–86. http://dx.doi.org/10.1515/znc-2004-3-409.
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The alkaloid spectra of Datura innoxia plants grown in Egypt and Bulgaria were investigated by GC-MS. Thirty-eight alkaloids were detected in the roots, leaves and fruits of the plants. Five new alkaloids for D. innoxia are reported. Alkaloid spectra of Egyptian and Bulgarian plants differ significantly in respect to their alkaloid composition and main alkaloids accumulated in the plant organs.
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Ayer, William A., Lois M. Browne, A. Warren Elgersma y Peter P. Singer. "Identification of some L-numbered Lycopodium alkaloids". Canadian Journal of Chemistry 68, n.º 8 (1 de agosto de 1990): 1300–1304. http://dx.doi.org/10.1139/v90-200.
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The pioneering research on Lycopodium alkaloids carried out by R. H. F. Manske and L. Marion led to the characterization of a large number of alkaloids. Many of these alkaloids were designated by numbers preceded by an L (e.g., L1, which has since been shown to be dihydrolycopodine). While the identity of many of these alkaloids has now been established, several remain unreported. We have examined samples of alkaloids L15, L16, L17, L18, L22, L24, L25, L26, L28, L29, L31, and L35, obtained from Marion's collection, by GC–MS and GC–IR, and report herein the identity of these alkaloids and alkaloid mixtures. Most of the samples proved to be mixtures of known alkaloids. Acetylannofoline (5), a component of alkaloid L17, and 5,15-oxidolycopodane (9), a component of alkaloids L28 and L31, are identified for the first time as natural products. A complete listing of the L-numbered alkaloids is provided. Keywords: Lycopodium alkaloids, alkaloids, acetylannofoline, oxidolycopodane.
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Panaccione, Daniel, James Kotcon, Christopher Schardl, Richard Johnson y Joseph Morton. "Ergot alkaloids are not essential for endophytic fungus-associated population suppression of the lesion nematode, Pratylenchus scribneri, on perennial ryegrass". Nematology 8, n.º 4 (2006): 583–90. http://dx.doi.org/10.1163/156854106778614074.
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AbstractSeveral endophytic fungi of the genus Neotyphodium form symbiotic associations with Lolium spp. grasses and are renowned for production of bioactive alkaloids such as ergot alkaloids. Some of these endophytes make their grass partners less suitable as hosts for endoparasitic nematodes, including Pratylenchus spp. The potential for ergot alkaloids to affect nematode motility was investigated in vitro. Ergovaline, the ergot alkaloid pathway end product of several Neotyphodium spp., was the only ergot alkaloid tested that inhibited motility of Pratylenchus scribneri. The association of ergot alkaloids with nematode population suppression was examined in glasshouse experiments with strains of the perennial ryegrass endophyte Neotyphodium sp. isolate Lp1 (syn. Neotyphodium lolii × Epichloë typhina) that have been genetically modified to lack ergot alkaloids or to have an altered ergot alkaloid profile. Populations of P. scribneri were significantly smaller in pots of perennial ryegrass containing the wild-type, ergot alkaloid-producing endophyte than in pots of endophyte-free perennial ryegrass. Elimination of certain complex ergot alkaloids (ergovaline and lysergic acid amides) in one gene knockout strain, or complete elimination of ergot alkaloids in another, did not affect the ability of the endophyte to suppress populations of nematode. Presence and concentrations of ergot alkaloids in pseudostems were as expected based on presence and genotype of endophyte in each plant, but frequently were undetectable or in low concentration in roots. The data indicate that ergot alkaloids do not contribute significantly to the endophyte-associated suppression of Pratylenchus spp.
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Scott, Peter M., Gary A. Lombaert, Peter Pellaers, Stanley Bacler y Judy Lappi. "Ergot Alkaloids in Grain Foods Sold in Canada". Journal of AOAC INTERNATIONAL 75, n.º 5 (1 de septiembre de 1992): 773–79. http://dx.doi.org/10.1093/jaoac/75.5.773.
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Abstract Six pharmacologically active ergot alkaloids (ergonovine [ergometrine], ergosine, ergotamine, ergocornine, α-ergokryptine, and ergocristine) were determined by liquid chromatography with fluorescence detection in over 400 samples of grain foods. The survey was conducted over a 6-year period for rye flour, wheat flour, and bran/bran cereal, and a 5-year period for rye bread/crispbread; triticale flour was analyzed over a total of 3 years. The predominant alkaloids found were ergocristine and ergotamine. Rye flour was the most contaminated food; the incidence of alkaloid-positive samples was 118/128, annual mean concentrations of total alkaloids in positive samples ranged from 70 to 414 ng/g, and 1 sample contained as high as 3972 ng total alkaloids/g. In wheat flour, total alkaloid concentrations were much lower than in rye flour, with annual means in positive samples (68/93) of 15-68 ng/g. Bran/bran cereal had alkaloid concentrations similar to those in wheat flour, with annual means of 12-69 ng total alkaloids/g positive samples (incidence 29/35). Triticale flour was also an important source of ergot alkaloids; incidence was 24/26, and annual mean total alkaloid concentrations in positive samples were 46-283 ng/g. Ergot alkaloids were found in rye bread (46/100) and other heat-processed rye flour products (6/14). Annual mean total alkaloids in positive rye bread/crispbread samples ranged from 4.8 to 100 ng/g; the latter included a sample with 1248 ng total alkaloids/g.
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Aljeboory, Ali A. H., Rafid M. Hashim, Reem G. Hussein y Yahya Y. Z. Farid. "Capparis Spinosa as an Alternative Nanoscience Medicine in Treatment of Cancer (A New Aspect of Cancer Treatment)". Journal Port Science Research 7, n.º 1 (9 de abril de 2024): 77–86. http://dx.doi.org/10.36371/port.2024.1.10.
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Because of its high number of bioactive constituents in Capparis Spinosa especially polyphenolic compounds. We have studied the extraction and identification of active constituents of bioorganic solvents polar and non-polar we have managed to identify new qualities and quantities of alkaloids from residue of chloroformic extract and separate three groups of alkaloid including tertiary - quaternary strong base alkaloid and classify the obtained individual alkaloids three groups weakly bases alkaloids, alkaloids of medium basicity, strongly bases alkaloid we found promising quantity of alkaloids in Capparis Spinosa and we tried experimental pharmacological and Biological studies of these alkaloids on cancer infected animals we got promising result as we are going to mention in our manuscript. This promising result support that the natural product evidence will continue to be important in the following areas of discovery of new drugs and to find a solution for the problem of cancer and viral incurable diseases.
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Nikolic, Milan y Sinisa Djordjevic. "Alkaloids in the pharmaceutical industry: Structure, isolation and application". Chemical Industry 57, n.º 10 (2003): 471–78. http://dx.doi.org/10.2298/hemind0310471n.
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By the end of the 18th and the beginning of the 19th century a new era began in medicine, pharmaceutics and chemistry that was strongly connected with alkaloids and alkaloid drugs. Even before that it was known that certain drugs administered in limited doses were medicines, and toxic if taken in larger doses (opium, coke leaves, belladonna roots, monkshood tubers crocus or hemlock seeds). However, the identification, isolation and structural characterization of the active ingredients of the alkaloid drugs was only possible in the mid 20th century by the use of modern extraction equipment and instrumental methods (NMR, X-ray diffraction and others).In spite of continuing use over a long time, there is still great interest in investigating new drugs, potential raw materials for the pharmaceutical industry, as well as the more detailed investigation and definition of bio-active components and the indication of their activity range, and the partial synthesis of new alkaloid molecules based on natural alkaloids. The scope of these investigations, especially in the field of semi-synthesis is to make better use of the bio-active ingredients of alkaloid drugs, i.e. to improve the pharmacological effect (stronger and prolonged effect of the medicine, decreased toxicity and side effects), or to extend or change the applications. A combined classification of alkaloids was used, based on the chemical structure and origin, i.e. the source of their isolation to study alkaloid structure. For practical reasons, the following classification of alkaloids was used: ergot alkaloids, poppy alkaloids, tropanic alkaloids purine derivative alkaloids, carbon-cyclic alkaloids, and other alkaloids. The second part of this report presents a table of general procedures for alkaloid isolation from plant drugs (extraction by water non-miscible solvents, extraction by water-miscible solvents and extraction by diluted acid solutions). Also, methods for obtaining chelidonine and glaucine as hydrochloride bases and salts were presented in more details. Data from leading world pharmacopoeias (Ph. Eur. Ill/s 2000, DAB 1996, USP 23, JP XIII, BP 1993, Ph. Jug. IV) were used in the study of application of the pure alkaloids in pharmaceutical forms with predetermined doses. A comparative study of these data shows that a great number of preparations are produced worldwide based on alkaloids and alkaloids with modified structure. These medicines have found use in modern therapeutic practice in many countries. Most products are produced on the basis of caffeine, theophylline, ephedrine, atropine, scopolamine, reserpine and pilocarpine.
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Slavík, Jiří, Ladislav Dolejš y Leonora Slavíková. "Alkaloids from Corydalis solida (L.) SW. mass spectrometry of quaternary benzylisoquinoline alkaloids". Collection of Czechoslovak Chemical Communications 50, n.º 10 (1985): 2299–309. http://dx.doi.org/10.1135/cccc19852299.
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From the strongly polar fraction from the tubers of Corydalis solida (L.) SW., a new quaternary alkaloid, (+)-N-methyllaudanidinium iodide, was isolated after conversion to iodides. Mass spectrometric behaviour of this type of quaternary alkaloids is described. In the tubers (0.37% of alkaloids) the main alkaloid component is (+)- and (±)-tetrahydropalmatine; other dominant alkaloids include protopine, (+)-corydaline, allocryptopine, dehydrocorydaline and jatrorrhizine. (±)-Corybulbine, (+)-corypalmine, (-)-isocorypalmine, (-)-scoulerine, (-)-stylopine, corysamine, palmatine, (+)-N-methyllaudanidinium hydroxide, (-)-cis-N-methylcanadinium hydroxide and cis-N-methylstylopinium hydroxide represent minor alkaloids. The last three mentioned were isolated in the form of iodides. Bulbocapnine, coptisine, berberine and columbamine were detected in trace amounts. The main alkaloid of the aerial parts of the plant (0.35% of alkaloids) is berberine, accompanied by coptisine, (-)- and (±)-canadine, (-)-stylopine, isoboldine, protopine, columbamine and (-)-cis-N-methylcanadinium hydroxide (isolated in the form of iodide) as significant components. Among minor alkaloids allocryptopine, (-)-isocorypalmine, (+)-corypalmine, (±)- and (-)-tetrahydropalmatine, corysamine, dehydrothalictricavine, palmatine and cis-N-methylstylopinium hydroxide (as iodide) were isolated and trace amounts of jatrorrhizine and bulbocapnine were detected.
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Breiterová, Kateřina, Miroslav Ločárek, Eliška Kohelová, Markéta Talácková, Daniela Hulcová, Lubomír Opletal y Lucie Cahlíková. "Daffodils as Potential Crops of Biologically-active Compounds: Assessment of 40 Ornamental Taxa for their Alkaloid Profile and Cholinesterases Inhibition Activity". Natural Product Communications 13, n.º 4 (abril de 2018): 1934578X1801300. http://dx.doi.org/10.1177/1934578x1801300410.
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Many varieties of Narcissus (Amaryllidaceae) are planted on a large scale for ornamental purposes and at the same time they represent a rich reservoir of potential small chemical molecules that display several medicinal properties. Of the Amaryllidaceae alkaloids, considerable attention has been given to galanthamine, which possesses acetylcholinesterase inhibitory activity. Recent investigation has shown the pharmaceutical potential of other Amaryllidaceae alkaloids, such as lycorine, haemanthamine, and pancratistatine, primarily as anticancer drugs. In the current study, 40 Narcissus taxa were evaluated for their alkaloid profile by GC-MS. The aim of this work was to find the most suitable Narcissus varieties for a reliable source of galanthamine, lycorine, and haemanthamine for commercial production. Based on their mass spectra, 97 typical Amaryllidaceae alkaloids were detected of which 49 were identified. The highest concentrations of pharmaceutically-interesting Amaryllidaceae alkaloids were identified in the ornamental taxa N. cv Sundisc (galanthamine), N. cv. Jenny (lycorine), and N. cv. Sealing (haemanthamine). All alkaloidal extracts were also screened for their acetylcholinesterase and butyrylcholinesterase inhibitory activities.
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Berkov, Strahil, Luba Evstatieva y Simeon Popov. "Alkaloids in Bulgarian Pancratium maritimum L." Zeitschrift für Naturforschung C 59, n.º 1-2 (1 de febrero de 2004): 65–69. http://dx.doi.org/10.1515/znc-2004-1-214.
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A GC/MS analysis of alkaloids from leaves, bulbs and roots of Pancratium maritimum was performed. From the identified 16 alkaloids, 5 alkaloids were reported for the first time for this plant. Several compounds with pharmacological activity were found. Haemanthamine was main alkaloid in the leaves and bulbs whereas galanthane was found to be main alkaloid in roots.
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Sun, Bo, Yu-Xiao Tian, Fen Zhang, Qing Chen, Yong Zhang, Ya Luo, Xiao-Rong Wang, Fu-Cheng Lin, Jun Yang y Hao-Ru Tang. "Variations of Alkaloid Accumulation and Gene Transcription in Nicotiana tabacum". Biomolecules 8, n.º 4 (15 de octubre de 2018): 114. http://dx.doi.org/10.3390/biom8040114.
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To increase the understanding of alkaloid biosynthesis in Nicotiana tabacum during whole plant growth periods, variations of the contents of alkaloids and the transcription of key biosynthetic genes in fresh leaves were investigated in three varieties at five developmental stages. Six alkaloids were analyzed by gas chromatograph–mass spectrometry (GC–MS) and the most abundant alkaloid was observed during the upper leaves maturing stage in the varieties, among which the alkaloid content of K326 was the highest. Considering the genetic effect, variance analysis indicated that the developmental stage played a predominant role in alkaloid accumulation. Moreover, the levels of biosynthetic gene transcripts in the leaves at the vigorous growing stage might contribute to the contents of alkaloids in the leaves during the maturing stages. To further illuminate the metabolism of alkaloid biosynthesis, a correlation among alkaloids was also documented.
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Bhambhani, Sweta, Kirtikumar R. Kondhare y Ashok P. Giri. "Diversity in Chemical Structures and Biological Properties of Plant Alkaloids". Molecules 26, n.º 11 (3 de junio de 2021): 3374. http://dx.doi.org/10.3390/molecules26113374.
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Phytochemicals belonging to the group of alkaloids are signature specialized metabolites endowed with countless biological activities. Plants are armored with these naturally produced nitrogenous compounds to combat numerous challenging environmental stress conditions. Traditional and modern healthcare systems have harnessed the potential of these organic compounds for the treatment of many ailments. Various chemical entities (functional groups) attached to the central moiety are responsible for their diverse range of biological properties. The development of the characterization of these plant metabolites and the enzymes involved in their biosynthesis is of an utmost priority to deliver enhanced advantages in terms of biological properties and productivity. Further, the incorporation of whole/partial metabolic pathways in the heterologous system and/or the overexpression of biosynthetic steps in homologous systems have both become alternative and lucrative methods over chemical synthesis in recent times. Moreover, in-depth research on alkaloid biosynthetic pathways has revealed numerous chemical modifications that occur during alkaloidal conversions. These chemical reactions involve glycosylation, acylation, reduction, oxidation, and methylation steps, and they are usually responsible for conferring the biological activities possessed by alkaloids. In this review, we aim to discuss the alkaloidal group of plant specialized metabolites and their brief classification covering major categories. We also emphasize the diversity in the basic structures of plant alkaloids arising through enzymatically catalyzed structural modifications in certain plant species, as well as their emerging diverse biological activities. The role of alkaloids in plant defense and their mechanisms of action are also briefly discussed. Moreover, the commercial utilization of plant alkaloids in the marketplace displaying various applications has been enumerated.
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Vieira, Ivo J. C., Walter L. B. Medeiros, Cecilia S. Monnerat, Jucimar J. Souza, Leda Mathias, Raimundo Braz-Filho, Angelo C. Pinto, Priscila M. Sousa, Claudia M. Rezende y Rosângela De A. Epifanio. "Two fast screening methods (GC-MS and TLC-ChEI assay) for rapid evaluation of potential anticholinesterasic indole alkaloids in complex mixtures". Anais da Academia Brasileira de Ciências 80, n.º 3 (septiembre de 2008): 419–26. http://dx.doi.org/10.1590/s0001-37652008000300003.
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The pharmacotherapyfor Alzheimer's disease (AD) includes the use of acetylcholinesterase inhibitors (AChEI). Recent investigations for novel AD therapeutic agents from plants suggested that Tabernaemontana genus is a promising source of novel anticholinesterasic indole alkaloids. In this work two fast screening techniques were combined in order to easily identify novel cholinesterase inhibitors (ChEI). Gas chromatography-mass spectrometry (GC-MS) of the less polar alkaloidic fractions obtained from the acid-base extraction of the stalk of T. laeta revealed thirteen monoindole alkaloids, four of them confirmed by co-injection with previously isolated alkaloids. The others were tentatively identified by mass fragmentation analysis. By gas chromatography with flame ionization detection (GC-FID) and using isatin as internal standard, affinisine and voachalotine were determined as major compounds. These fractions and fourteen previously isolated alkaloids, obtained from root bark of T. laeta and T. hystrix were investigated for acetyl (AChE) and butyrylcholinesterase (BuChE) inhibitory activities by the modified Ellman's method in thin layer chromatography(TLC-ChEI). Results showed selective inhibition of the alkaloids heyneanine and Nb-methylvoachalotine for BuChE, and 19-epi-isovoacristine for AChE, whereas olivacine, affinisine, ibogamine, affinine, conodurine and hystrixnineinhibited both enzymes. In addition to confirming that monoterpenoid indole alkaloids can be novel therapeutic agents for AD, this is the first report of the ChEI activity of olivacine, a pyridocarbazole alkaloid.
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Setyaningrum, Lindawati y Dhina Ayu Susanti. "PENETAPAN KADAR ALKALOID TOTAL PADA EKSTRAK N-HEKSAN DAN ETANOL BIJI KETUMBAR (Coriandrum sativum) MENGGUNAKAN SPEKTROFOTOMETER UV-Vis". Jurnal Riset Kefarmasian Indonesia 4, n.º 3 (30 de septiembre de 2022): 353–65. http://dx.doi.org/10.33759/jrki.v4i3.268.
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Coriander (Coriandrum sativum) is one of the medicinal plants which is known to contain secondary metabolites such as flavonoids, tannins, terpenoids, saponins, steroids, and alkaloids. Alkaloids have therapeutic effects as antimalarials and cancer. Research in determining the alkaloids in coriander was carried out by separating the alkaloids from other substances using the soxhlet method extraction with two solvents ethanol and n-hexane. The total alkaloid content is determined using a UV-VIS spectrophotometer at wavelength 351,5 nm. The reaction of alkaloids with Bromocresol green (BCG) is obtained to form a yellow product. The use of berberine standard was obtained the total alkaloid content of ethanol and n-hexane extract in coriander seed (Coriandrum sativum) were 0.524% and 0.583% respectively, and the ratio of total alkaloid content of ethanol extract was smaller than that of n-hexane extract.
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Slavík, Jiří y Leonora Slavíková. "Alkaloids from Corydalis nobilis (L.) PERS. and C. intermedia (L.) MÉRAT". Collection of Czechoslovak Chemical Communications 54, n.º 7 (1989): 2009–20. http://dx.doi.org/10.1135/cccc19892009.
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Rhizomes of Corydalis nobilis (L.) PERS. (3% of alkaloids) contain (+)-tetrahydropalmatine, (+)-bicuculline and (+)-corytuberine as the main constituents of the tertiary alkaloid fraction. Protopine, (+)-corypalmine and (+)-stylopine, which also belong to the dominant alkaloids, were isolated in lesser amounts. As minor alkaloids were isolated (±)-tetrahydropalmatine, (+)-corydaline, allocryptopine, cryptopine, (-)-scoulerine, (+)-adlumidine, (+)-sinactine, (±)-corlumine, isoboldine, (+)-corybulbine, (±)-stylopine and (-)-isocorypalmine. The fraction of quaternary protoberberine alkaloids afforded coptisine dehydrocorydaline, palmatine, corysamine jatrorrhizine and cis-N-methylstylopinium hydroxide. Aobamidine (Z-adlumidiceine enol lactone), isolated as the principal alkaloid of aerial parts (0.3% of alkaloids), is obviously an artifact arising from bicuculline N-metho salt during the isolation process. Further dominant alkaloids of the tertiary fraction were adlumidine, bicuculline, protopine, (±)-tetrahydropalmatine and (±)-corlumine; as minor alkaloids were isolated corytuberine, scoulerine, corypalmine, cryptopine, isocorypalmine, corybulbine, (+)-corydalizine, and unidentified alkaloids CN 1 (C23H25NO5, m.p. 211 °C) and CN 2 (m.p. 261 °C). Quaternary protoberberine fraction afforded coptisine and palmatine. Nineteen of the mentioned alkaloids were isolated from this species for the first time. Tubers of C. intermedia (L.) MÉRAT (0.70% of alkaloids) afforded protopine, tetrahydropalmatine and corydaline as the main alkaloids and allocryptopine, canadine stylopine, palmatine, dehydrocorydaline, berberine, coptisine as minor alkaloids, together with traces of bicuculline and magnoflorine. Dominant alkaloids of the aerial part (0.73% of alkaloids) were bicuculline, bulbocapnine, protopine, stylopine and an unidentified phenolic base, m.p. 258 °C. Isoboldine, scoulerine, allocryptopine, corydaline, canadine, coptisine, palmatine and berberine were identified as the minor alkaloids.
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Jones, Nadiá M., M. Gabriela Bernardo-Gil y M. Graço Lourenco. "Comparison of Methods for Extraction of Tobacco Alkaloids". Journal of AOAC INTERNATIONAL 84, n.º 2 (1 de marzo de 2001): 309–16. http://dx.doi.org/10.1093/jaoac/84.2.309.
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Abstract Ultrasound and microwave techniques were used to extract tobacco alkaloids, and response surface methodology was used to optimize extraction conditions. Ultrasonic technique factors were temperature, 30–85°C; time, 3–45 min; solvent volume, 8–80 mL. Microwave extraction factors were pressure, 15–75 psi; time, 3–40 min; power, 30–90% of the maximum magnetron power of 650 W. Soxhlet and solvent AOAC-modified extraction methods were also applied after some improvements. Nicotine, nornicotine, anabasine, and anatabine were quantified by gas chromatography. A steam distillation International Standards Organization method for total alkaloid evaluation was used as reference. The results obtained by the different methods were compared using a least squares deviation test. The ultrasonic and the proposed modified-AOAC extraction method were the more convenient with regard to practicability and precision. The relative deviations (n = 5) were as follows: For the ultrasonic method in low-level alkaloid tobaccos, 0.7% nicotine and 1.4–14% minor alkaloids; in high-level alkaloid tobaccos, 2.4% nicotine and 4.5–5.1% minor alkaloids. For the modified AOAC method in low-level alkaloid tobaccos, 0.9% nicotine and 2.4–11.6% minor alkaloids; and in high-level alkaloid tobaccos, 1.7% nicotine and 2.0–2.4% minor alkaloids.
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Táborská, Eva, Milena Mikešová, František Věžník y Jiří Slavík. "Alkaloids of the two Hypecoum L. species". Collection of Czechoslovak Chemical Communications 52, n.º 2 (1987): 508–13. http://dx.doi.org/10.1135/cccc19870508.
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Alkaloids from Hypecoum procumbens L. and H. leptocarpum HOOK. F. et THOMS. were investigated. Protopine was the dominant alkaloid in both species. From H. procumbens chelerythrine and corydine were newly isolated in addition to the earlier detected alkaloids allocryptopine, sanguinarine, coptisine, and isocorydine. From H. leptocarpum allocryptopine, isocorydine and corydine were isolated for the first time, in addition to the earlier described alkaloids protopine, sanguinarine, chelerythrine and coptisine. Cryptopine was detected chromatographically. From the fraction of strongly polar alkaloids of both species magnoflorine, (-)-trans-N-methyl-stylopinium hydroxide, and in small amounts a new secoberbine alkaloid of oxohypecorinine structure, procumbine (I), and two further alkaloids of unsolved structure were isolated in the form of iodides.
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Shukla, S., H. K. Yadav, A. Rastogi, B. K. Mishra y S. P. Singh. "Alkaloid diversity in relation to breeding for specifi c alkaloids in opium poppy (Papaver somniferum L.)". Czech Journal of Genetics and Plant Breeding 46, No. 4 (14 de diciembre de 2010): 164–69. http://dx.doi.org/10.17221/96/2009-cjgpb.
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Papaver somniferum is a chief source of diverse physiologically active alkaloids, required by the pharmaceutical industry. The present study describes the diversity of the alkaloid spectrum of 122 opium poppy accessions of Indian origin by means of a cluster analysis based on Mahalanobis generalised distances. The accessions could be grouped into 11 clusters according to their relationship between the contents of morphine, codeine, thebaine, narcotine and papaverine in raw opium. The diversity of the alkaloid spectrum of 11 clusters reflected the very low correlations between the contents of the individual alkaloids across the 122 entries, found earlier. The clusters represented almost all possible combinations of the high content of an alkaloid with high or low content of another alkaloid. Although on average the morphine content exceeds the sum of the other four alkaloids, in one cluster the narcotine content (15.3%) was even higher than that of morphine (14.6%) and the content of the remaining alkaloids was also extremely high. The variation range among the clusters was for papaverine between 0.14% to 5.3%, while for morphine between 12.4% to 18.0%. The results indicate a large space for the breeding of opium poppy for individual alkaloids or particular combinations of alkaloids, as required by pharmaceutical industries.
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Cahlíková, Lucie, Radim Kučera, Anna Hošt’álková, Jiří Klimeš y Lubomír Opletal. "Identification of Pavinane Alkaloids in the Genera Argemone and Eschscholzia by GC-MS". Natural Product Communications 7, n.º 10 (octubre de 2012): 1934578X1200701. http://dx.doi.org/10.1177/1934578x1200701008.
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The genera Eschscholtzia and Argemone(Papaveraceae) represent a rich source of pavinane alkaloids, the identification of which in alkaloid extracts is generally problematic without standards. The alkaloid extracts of three Argemone and four Eschscholtzia species were analyzed using GC-MS. The alkaloids were identified based on comparison of their mass spectra with commercial libraries, with reported data in the literature and with spectra of reference compounds. A total of 23 alkaloids of six structural types (pavinane, protopine, benzylisoquinoline, benzophenanthridine, aporphine and protoberberine) were identified. The fragmentation pathway of pavinane alkaloids was used for their identification. O-Methylneocaryachine has been reported for the first time from a natural sources and the alkaloid pattern of Eschscholzia pulchella has been analyzed and described for the first time.
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Turner, Matthew, Roberto Cruz, Jordan Elwell, John French, Jared Mattos y Owen McDougal. "Native V. californicum Alkaloid Combinations Induce Differential Inhibition of Sonic Hedgehog Signaling". Molecules 23, n.º 9 (1 de septiembre de 2018): 2222. http://dx.doi.org/10.3390/molecules23092222.
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Veratrum californicum is a rich source of steroidal alkaloids such as cyclopamine, a known inhibitor of the Hedgehog (Hh) signaling pathway. Here we provide a detailed analysis of the alkaloid composition of V. californicum by plant part through quantitative analysis of cyclopamine, veratramine, muldamine and isorubijervine in the leaf, stem and root/rhizome of the plant. To determine whether additional alkaloids in the extracts contribute to Hh signaling inhibition, the concentrations of these four alkaloids present in extracts were replicated using commercially available standards, followed by comparison of extracts to alkaloid standard mixtures for inhibition of Hh signaling using Shh-Light II cells. Alkaloid combinations enhanced Hh signaling pathway antagonism compared to cyclopamine alone, and significant differences were observed in the Hh pathway inhibition between the stem and root/rhizome extracts and their corresponding alkaloid standard mixtures, indicating that additional alkaloids present in these extracts are capable of inhibiting Hh signaling.
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Pawelka, Karl-Heinz y Joachim Stöckigt. "Indole Alkaloids from Ochrosia elliptica Plant Cell Suspension Cultures". Zeitschrift für Naturforschung C 41, n.º 4 (1 de abril de 1986): 381–84. http://dx.doi.org/10.1515/znc-1986-0402.
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From cell suspension cultures of Ochrosia elliptica Labill. eight different monoterpenoid indole alkaloids were isolated and comprised three alkaloid classes viz. Corynanthe/Heteroyohimbine (tetrahydroalstonine, cathenamine, pleiocarpamine and two methoxylated heteroyohimbines), Strychnos (norfluorocurarine), Apparicine (apparicine and epchrosine). A ll these compounds except the Strychnos alkaloid are biogenetically closely related to the known alkaloids occurring in Ochrosia plants, although such alkaloids have not previously been detected in O. elliptica. Epchrosine has not before been described as a natural product.
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Tittlemier, S. A., D. Drul, M. Roscoe y J. G. Menzies. "The effects of selected factors on measured ergot alkaloid content in Claviceps purpurea-infected hexaploid and durum wheat". World Mycotoxin Journal 9, n.º 4 (24 de octubre de 2016): 555–64. http://dx.doi.org/10.3920/wmj2015.2019.
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Four wheat genotypes, including the ergot-susceptible durum ‘AC Avonlea’ and hard red spring wheat ‘AC Cadillac’, as well as the resistant durum wheat line 9260B-173A and the hard red spring wheat line ‘Kenya Farmer’ wereinoculated with different Claviceps purpurea isolates. Honeydew and sclerotia were collected and analysed for 10 ergot alkaloids. Total concentrations of the 10 ergot alkaloids ranged from 16 µg/kg in honeydew to 1,798 mg/kg insclerotia. Ergonovine and ergosine were the predominant alkaloids in honeydew obtained from plants inoculated with various isolates, whereas ergocristine and ergocryptine were the main alkaloids observed in sclerotia. Bothhost plant and C. purpurea isolate were significant factors affecting total ergot alkaloid concentrations in sclerotia. Irrespective of host plant line, all mean total ergot alkaloid concentrations were higher in sclerotia produced from the EI-2 isolate (695-1,010 mg/kg), as compared to EI-4 (255-594 mg/kg). The mass of total ergot alkaloids was alsopositively correlated with the mass of individual sclerotia produced from these two C. purpurea isolates, with the slope of the regression higher for the EI-2 isolate. The total ergot alkaloid concentrations in sclerotia from various plants inoculated with the same C. purpurea isolate differed; however, the resistance of host plant line did notappear to be consistent with ergot alkaloid content in sclerotia. Concentrations of total ergot alkaloids were highestand lowest in sclerotia from the two lines that are both classified as ‘resistant’, suggesting that the mechanism ofresistance for these lines is not restriction on the production of ergot alkaloids in sclerotia.
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Chaplin, JF. "Die Züchtung von TabakimHinblick auf verschieden hohe Alkaloidgehalte - Tobacco Breeding in View of Different Levels of Alcaloid Contents". Beiträge zur Tabakforschung International/Contributions to Tobacco Research 14, n.º 1 (1 de diciembre de 1987): 1–9. http://dx.doi.org/10.2478/cttr-2013-0578.
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AbstractTwo systems of genetic control are involved in the quality and level of total alkaloids in tobacco (Nicotianatabacum L.). A single locus controls the conversion of nicotine to nornicotine and two loci control total alkaloid levels. These levels may be further modified by minor genes or quantitative factors. Breeding lines and cultivars of flue-cured tobacco have been developed with varying levels of total alkaloids (nicotine). Levels of nicotine in tobacco range from near zero in cigar strains up to 4.5 % in Burley varieties. Within the collection of N. tabacumgermplasm and Nicotiana species maintained by the Agricultural Research Service of the U.S. Department of Agriculture, total alkaloid levels range from 0.20 % to 7.87 %. Flue-cured lines of tobacco with varying levels of total alkaloids have been developed and characterized. In general the high alkaloid lines had the highest grade indexes. All of the extremely low alkaloid lines were also lower in grade index indicating that total alkaloids do have some relationship with the grade index. The high total alkaloid lines were lower in yield. However, it is believed that the levels of total alkaloids reported do not result from yield variation. N. rustica generally has considerably higher total alkaloid levels, based on percent dry weight, than N. tabacum. With the stabilizing of a low total alkaloid line of N. tabacum (0.20 %) it was feasible to introgress the gene(s) for alkaloid production from N. rustica into N. tabacum. Indications are that more than one gene is responsible for total alkaloid production in this material. Also preliminary indications are that the genes for total alkaloid production in N. rustica may be the same as those in N. tabacum.
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Meles, Dewa Ketut, Wurlina Wurlina y Dewa Putu Anom Adnyana. "Measurement of Alkaloids Achyranthes Aspera Linn Level Using Thin Layer Chromatography Method and High-Performance Liquid Chromatography". KnE Life Sciences 3, n.º 6 (3 de diciembre de 2017): 378. http://dx.doi.org/10.18502/kls.v3i6.1146.
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One of the plants with the potential to be developed into a raw material for anti-breast cancer drugs is jarong (Achyranthes aspera linn). Allegedly alkaloid of Achryranthes aspera linn leaves showed anticancer activity in vitro in mice myeloma cells is extremely potent. In vivo study showed that the alkaloid Achyranthes aspera linn causes apoptosis and healing in breast cancer cells in mice induced by benzopyrene. Alkaloids of Achyranthes aspera linn leaves as anticancer been listed on Incestual Property Rights (IPR) since October 12, 2012, with number P00201299839. This study aims to prove the existence of alkaloids in the leaves of Achyranthes aspera linn using thin layer chromatography (TLC), determine the level of alkaloids in the leaves alkaloid fraction of Achyranthes aspera using High-Performance Liquid Chromatography (HPLC) and alkaloid fraction dose as an anticancer and dosing for the study. Alkaloid qualitative measurement results with thin layer chromatography showed alkaloid in orange. Alkaloid levels using HPLC has a retention time of 3.482 minutes, a wavelength of 254 nm, there are 13 kinds of chemical substances with the major components amounted to 52.36% alkaloids, the other component is the green substance with a peak area of 13.0624%, while other chemical substances in a very small peak area of between 0.428% until 8.3598%. Alkaloid fraction dose of Achyranthes aspera used in the study as anticancer is controlled the dose of 0 mg/kg, 1 treatment dose of 60 mg/kg, 2 treatment dose of 75 mg/kg and 3 treatment dose of 90 mg/kg. Keywords: Alkaloids, Achyranthes aspera linn, TLC, HPLC.
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Galek, R., E. Sawicka-Sienkiewicz, D. Zalewski, S. Stawiński y K. Spychała. "Searching for low alkaloid forms in the Andean lupin (Lupinus mutabilis) collection". Czech Journal of Genetics and Plant Breeding 53, No. 2 (16 de mayo de 2017): 55–62. http://dx.doi.org/10.17221/71/2016-cjgpb.
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The Andean lupin (Lupinus mutabilis Sweet) is the only cultivated species of the genus Lupinus originating from South America. Attempts were made to introduce this species to European soil and climatic conditions. The main disadvantages of the Andean lupin include too long and non-uniform maturation of pods in a plant, dropping flowers and pod buds, and a high alkaloid content (up to 5%). The aim of this study was to identify in post-mutagen treated material genotypes with low alkaloid content in seeds, which would be useful for improving L. mutabilis by breeding. The iodine test was annually performed to test the presence of alkaloids in seeds, using Lugol’s solution (I in KI). Based on the turbidity of the test samples, the investigated plants were divided into four groups, labelled as follows: G – individuals with a high content of alkaloids (very bitter), P – individuals with an intermediate content of alkaloids (bitter), PS – individuals with a low alkaloid content (fairly sweet) and S – individuals with a very low alkaloid level (sweet). For further propagation, mainly individuals from the S and PS groups were selected, and by part from the group P, while all bitter forms (G group) were rejected. Thirty chosen lines were examined for the content and composition of alkaloids by gas chromatography. The alkaloid content did not exceed 0.1% in 13 favourable lines, and even two lines had less than 0.05%. The seeds of the studied material contained 7 to 9 different alkaloids. The prevailing alkaloids in the seeds of the Andean lupin were 4-hydroxylupanine and lupanine. Significant progress has been achieved in reducing the content of alkaloids in subsequent generations of the investigated representatives of Lupinus mutabilis from South America.
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Wink, Michael y Ludger Witte. "Cell-Free Synthesis of the Alkaloids Ammodendrine and Smipine". Zeitschrift für Naturforschung C 42, n.º 3 (1 de marzo de 1987): 197–204. http://dx.doi.org/10.1515/znc-1987-0304.
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The bipiperidyl alkaloid ammodendrine was detected in 28 plant species as a minor alkaloid besides quinolizidine alkaloids. Cadaverine serves as a precursor for both quinolizidine alkaloids and for ammodendrine, since labelled cadaverine is incorporated into both rings of ammodendrine. Cell-free extracts of Lupinus arboreus and of Pisum sativum, which contain an active diamine oxidase form ammodendrine from cadaverine and pyruvate. In addition to ammodendrine other alkaloids such as smipine, tetrahydroanabasine and tripiperideine could be detected. Possible reaction schemes are discussed.
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Huybrechts, Bart, Svetlana V. Malysheva y Julien Masquelier. "A Targeted UHPLC-MS/MS Method Validated for the Quantification of Ergot Alkaloids in Cereal-Based Baby Food from the Belgian Market". Toxins 13, n.º 8 (29 de julio de 2021): 531. http://dx.doi.org/10.3390/toxins13080531.
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Following pending new legislation in the European Union setting a maximum of 20 ng g−1 for the total sum of ergot alkaloids in dry cereal-based baby food, a new UHPLC-MS/MS method was developed. It is suitable for the quantification of six ergot alkaloids: Ergocornine, ergocristine, ergometrine, ergosine, ergotamine, α-ergocryptine, and their corresponding epimers. The method is able to reliably detect individual ergot alkaloids at a level as low as 0.5 ng g−1. The method uses a modified QuEChERS extraction approach before UHPLC-MS/MS analysis. The method showed good sensitivity, accuracy, and precision. It has been applied to 49 samples from the Belgian market. In 26 samples, not a single ergot alkaloid was detected while in 23 out of 49 samples at least one ergot alkaloid was detected with 2 samples containing 12 ergot alkaloids. Ergometrine was the alkaloid most frequently detected i.e., 16 out of 49 samples. Only one sample, testing positive for all 12 ergot alkaloids, would be non-conforming to the newly proposed Maximum Residue Level (MRL).
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Eliza, Eliza y Dasril Basir. "Some of South Sumatran Plants Containing Alkaloids". Indonesian Journal of Fundamental and Applied Chemistry 7, n.º 1 (20 de febrero de 2022): 32–36. http://dx.doi.org/10.24845/ijfac.v7.i1.32.
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A phytochemical survey for alkaloid-containing plants has been conducted in South Sumatra including traditional medicinal plants. During the survey 180 satisfactory herbarium sample were obtained and all of them were tested for alkaloids. The results showed that 33 species gave a positive test for alkaloids, and high alkaloid contents were shown by: Alstonia scholaris, Alstonia angustiloba, Ervatamia coronariaa, Voacanga foetida Bl. K. Schum, Litseaacceden toides K & V, Litsea angualata, Litsea tomentosa, Fibraurea chloroleuca Miers (root), and Uncaria cordata (Lour.) Merr. The aboved survey was also continued to be an intensively phytochemical work focusing on alkaloid of Fibraurea chloroleuca Miers root. A quaternary isoquinoline alkaloid as a yellowish crystal, m.p. 214-215 oC; MS (FAB) m/z 352 has been successfully isolated and tested for antibacterial activity. This isolated alkaloid significantly inhibited Bacilus substilis, Shigela dysentriae, Staphylococus aireus, and Pseudomonas sp growth at 1 mg/mL. As a result, all of these alkaloid-containing plants are potential to explore their alkaloids and utilitarian for traditional medicines.
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Đukić, Miloš, Jelena Jovanović, Gordana Stojanović y Snežana Jovanović. "Chemical composition of the alkaloid extract isolated from Hylotelephium spectabile (Boreau) H. Ohba x telephium (L.) H. Ohba aerial parts". Advanced Technologies 10, n.º 2 (2021): 5–8. http://dx.doi.org/10.5937/savteh2102005d.
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There are many motives to study alkaloids within Crassulaceae family, such as chemotaxonomic consideration of alkaloid distribution and evaluation of their biological potential. Data on alkaloids from Sedum telephium (syn. H. telephium) aroused interest for further alkaloid investigation within the genus Hylotelephium H. Ohba. Thus, the aim of this study was to investigate and characterize other plant sources of alkaloids from the same genus. An alkaloid extract (AE-HS) was isolated from fresh aerial parts of a cultivated hybrid H. spectabile x telephium. The chemical composition of AE-HS was determined by GC-MS (gas chromatography - mass spectrometry) method. Eight components were identified, which made up 91.8% of the sample. The most present component of AE-HS was g-crotonolactone (78.6%) followed by 3-methyl-2-butenal (8.6%) and (E)-coniferyl alcohol (2.8%). Nicotine was identified as the only alkaloid in the AE-HS (0.4%). Along with many non-alkaloid compounds, a previous study found six alkaloids in AE of S. telephium (~7%), suggesting differences from our results. Additionally, alkaloid distribution is limited within other genera of the family and belonging to the same genus does not mean a uniform qualitative composition. Further analyzes of AEs of Hylotelephium taxa would certainly shed light on the pattern of alkaloid distribution.
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Doncheva, Tsvetelina, Nadezhda Kostova, Radostina Toshkovska, Stefan Philipov, Nam Vu, Dat Nguyen, Trung Nguyen, Giang Do y Hau Dang. "Alkaloids from Pandanus amaryllifolius and Pandanus tectorius from Vietnam and Their Anti-inflammatory Properties". Proceedings of the Bulgarian Academy of Sciences 75, n.º 6 (30 de junio de 2022): 812–20. http://dx.doi.org/10.7546/crabs.2022.06.04.
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Phytochemical investigation of the alkaloid composition in Pandanus amaryllifolius Roxb. and Pandanus tectorius Parkinson was carried out. Nine pandane alkaloids were isolated and determined. The alkaloids pandamarilactonine B, N-acetylnorpandamarilactonine A and pandamarilactonine G were found for the first time in P. tectorius. The total alkaloid mixtures and alkaloid fractions of the species were evaluated for their anti-inflammatory activity using in vitro experimental models.
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Sidibe, Mamadou Sadialiou, Olimjon Panjiyev, Rikhsivoy ZIYAEV, Sory Fofana y Golib Shodiyev. "Alcaloides Des Annonacees : Xyloethiopine, Un Nouvel Alcaloide De Xylopia Aethiopica A.Rich". International Journal for Research in Applied Science and Engineering Technology 10, n.º 3 (31 de marzo de 2022): 1635–40. http://dx.doi.org/10.22214/ijraset.2022.41036.
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Abstract: We studied the alkaloid composition of Xylopia aethiopica A. Rich ( Annona-ceae) leaves collected in republic of Guinea and isolated for the first time and identified the 3 benzyltetrahydroisoquinolines alkaloids: armépavine; coclaurine ; Nméthylcoclaurine, and a new alkaloid - xyloethiopine Keywords: Annonaceae; Xylopia aethiopica A. Rich., Alkaloids: benzyltetrahydroisoquinolines: armépavine ; coclaurine ; Nméthylcoclaurine ; xyloethiopine.
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Jitsuno, Maki, Akihito Yokosuka, Ken Hashimoto, Osamu Amano, Hiroshi Sakagami y Yoshihiro Mimaki. "Chemical Constituents of Lycoris albiflora and their Cytotoxic Activities". Natural Product Communications 6, n.º 2 (febrero de 2011): 1934578X1100600. http://dx.doi.org/10.1177/1934578x1100600208.
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An alcoholic extract of Lycoris albiflora (Amaryllidaceae) showed potent cytotoxic activity against HL-60 cells with an IC50 value of 1.7 μg/mL. Phytochemical examination of the extract resulted in the isolation of 15 alkaloids, including two phenanthridine-type alkaloids (1, 2), one benzylphenethylamine-type alkaloid (3), two crinane-type alkaloids (4, 5), one pyrrolophenanthridine-type alkaloid (6), six lycorenan-type alkaloids (7–12), and three galanthamine-type alkaloids (13–15), together with three neolignans (16–18), two flavans (19, 20), and two acetophenone derivatives (21, 22). Compound 3 (hostasinine A) has not been isolated from Amaryllidaceae plants, and 1, 2, 4, 5, 7–9, 11, 12 and 14–22 are the first isolation and identification from L. albiflora. The phenanthridine-type alkaloids (1, 2), as well as the alkaloids (3–5), exhibited potent cytotoxic activities against not only HL-60 cells but also HSC-2 cells, thus leading to the conclusion that these alkaloids are mainly responsible for the cytotoxicity of the L. albiflora extract. Compound 1 (lycoricidinol), with the most potent cytotoxic activities, induced apoptosis in both HL-60 cells and HSC-2 cells. It is notable that 1 induced transient autophagy and morphological changes in mitochondria in the early stages of the apoptotic cell death process in HSC-2 cells.
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Saha, Mrinmoy y Rich Carter. "Lycopodium Alkaloids: An Intramolecular Michael Reaction Approach". Synlett 28, n.º 17 (6 de junio de 2017): 2212–29. http://dx.doi.org/10.1055/s-0036-1588851.
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The Lycopodium alkaloids possess a rich history that has captured the attention of synthetic chemists across the globe. This large family consists of over 250 known natural products with diverse structural features and noteworthy biological activity. Herein, we interweave the synthetic accomplishments by others in the field with our own unified strategy to accessing multiple subfamilies of the Lycopodium alkaloids. This discussion includes lycopodine, the C10-hydroxy Lycopodium alkaloids (10-hydroxylycopodine, deacetylpaniculine and paniculine), pelletierine, cermizine D, fastigiatine, himeradine A, clavolonine and 7-hydroxylycopodine. A unifying feature of much of the work discussed within this account is the use of intramolecular Michael additions to construct key ring systems within the Lycopodium alkaloids. Examples include the use of an intramolecular keto-sulfone Michael reaction and an intramolecular heteroatom Michael reaction.1 General Background on Lycopodium Alkaloids2 Development of a Strategy for Lycopodium Alkaloids2.1 Generalized Strategy2.2 Known Syntheses of C10-Functionalized Lycopodium Alkaloids3 Quinolizidine-Type Alkaloids3.1 Background3.2 Development of the Heteroatom Michael Reaction3.3 Synthesis of the Core Lycopodine Building Block: Pelletierine3.4 Total Synthesis of Cermizine D3.5 Synthesis of the Eastern Half of Himeradine A4 Lycopodine-Type Alkaloids4.1 Total Syntheses of Lycopodine4.1.1 Earlier Racemic Syntheses4.1.2 Approach Toward the Tricyclic Skeleton of Lycopodine: Intramolecular Mannich4.1.3 Enantioselective Total Syntheses of Lycopodine4.2 Total Syntheses of Clavolonine (8-Hydroxylycopodine)4.3 Total Synthesis of 7-Hydroxylycopodine4.4 Synthetic Route for 10-Hydroxy Lycopodium Alkaloids4.4.1 Background4.4.2 Total Syntheses4.4.3 Impact of the C10-Stereochemistry5 Conclusion
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Grusie, T., V. Cowan, J. Singh, J. McKinnon y B. Blakley. "Proportions of predominant Ergot alkaloids (Claviceps purpurea) detected in Western Canadian grains from 2014 to 2016". World Mycotoxin Journal 11, n.º 2 (25 de abril de 2018): 259–64. http://dx.doi.org/10.3920/wmj2017.2241.
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Ergot alkaloids, produced by the fungus Claviceps purpurea, are contaminants of cereal crops. Depending on various factors, the relative composition of individual ergot alkaloids can differ among samples. The objective was to determine if the percentage of individual ergot alkaloids were similar across different cereal grains (barley n=39, rye n=7, triticale n=9, wheat n=94) collected in Western Canada over different years. Ergocristine was the predominant alkaloid accounting for half of the total alkaloids in all grain types. This study documented that barley, rye, triticale and wheat collected across Western Canada had similar percentages of ergocornine (6±1%, P=0.201), ergocristine (48±2%, P=0.939), ergocryptine (17±2%, P=0.302) and ergosine (5±0.5%, P=0.239). There were differences between grain types for ergometrine (P=0.027) and ergotamine (P=0.011), which ranged between 6 to 13% and 11 to 24%, respectively, of the total alkaloid content in different cereals. Both barley and wheat alkaloid percentages were similar between 2015 and 2016; ergocornine (7±1%, P=0.969), ergocristine (47±2%, P=0.680), ergocryptine (18±2%, P=0.572), ergometrine (8±1%, P=0.080), ergosine (15±1%, P=0.119) and ergotamine (P=0.189). The ergocornine percentage was higher in wheat (P=0.017) as compared to barley for 2015/2016 samples. Ergometrine was higher in barley (P=0.002) as compared to wheat for 2015/2016 samples. While two of the alkaloid proportions varied statistically, overall proportions of the six ergot alkaloids were comparable among the four grain types collected across Western Canada. If proportions of ergot alkaloids are similar across a region, then it may be deemed acceptable to recommend a maximum total ergot alkaloid concentration for that region. However, areas that exhibit variation among the ergot alkaloid proportions, individual ergot alkaloid guidelines based on a toxic equivalence factor, may be more appropriate. In contrast, since major differences were not seen between years or grain type, from a producer perspective there may be limited biological/toxicological significance for individual alkaloid guidelines.
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Wang, Hanqing, Changbo Xia, Li Chen, Jianjun Zhao, Weiwei Tao, Xia Zhang, Jianhuan Wang, Xiaojuan Gao, Jingjiao Yong y Jin-ao Duan. "Phytochemical Information and Biological Activities of Quinolizidine Alkaloids in Sophora: A Comprehensive Review". Current Drug Targets 20, n.º 15 (12 de noviembre de 2019): 1572–86. http://dx.doi.org/10.2174/1389450120666190618125816.
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Quinolizidine alkaloids, a main form of alkaloids found in the genus Sophora, have been shown to have many pharmacological effects. This review aims to summarize the photochemical reports and biological activities of quinolizidine alkaloids in Sophora. The collected information suggested that a total of 99 quinolizidine alkaloids were isolated and detected from different parts of Sophora plants, represented by lupinine-type, cytisine-type, sparteine-type, and matrine-type. However, quality control needs to be monitored because it could provide basic information for the reasonable and efficient use of quinolizidine alkaloids as medicines and raw materials. The nonmedicinal parts may be promising to be used as a source of quinolizidine alkaloid raw materials and to reduce the waste of resources and environmental pollution. In addition, the diversity of chemical compounds based on the alkaloid scaffold to make a biological compound library needs to be extended, which may reduce toxicity and find new bioactivities of quinolizidine alkaloids. The bioactivities most reported are in the fields of antitumor activity along with the effects on the cardiovascular system. However, those studies rely on theoretical research, and novel drugs based on quinolizidine alkaloids are expected.
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Święcicki, Wiktor y Konrad Jach. "Variation and evolution of alkaloid complex in yellow lupine (Lupinus luteus L.) during domestication". Acta Agrobotanica 33, n.º 2 (2013): 177–95. http://dx.doi.org/10.5586/aa.1980.015.
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A colection of 178 primitive and cultivated forms of <em>Lupinus luteus</em> was analysed with respect to composition and level of alkaloids in seeds. A considerable quantitative and qualitative variation in alkaloids was found in the analysed forms. All analysed primitive forms, not cultivated in Central Europe, contained gramine and lupinine; the majority had sparteine as well. Contrary to the common opinion, yellow lupine has three basic alkaloids, i.e. gramine, lupinine and sparteine. Moreover, a large number of primitive forms showed traces of unidentified alkaline compounds with alkaloid characteristics. It appears that in the course of introduction of yellow lupine to central Europe, the composition and level of its alkaloids have been gradually changing. Their reproduction and natural selection remarkably decreased the number of forms containing gramine as well as the total level of alkaloids in seeds. Cross breeding and screening for low alkaloid bearing forms significantly decreased the total level of gramine as well as the number of forms containing gramine and almost entirely eliminated traces of unidentified alkaloids. One new form was found to have sparteine and only a little of lupinine (total level of alkaloids 0,04%).
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Niño, Jaime, Gina M. Hincapié, Yaned M. Correa y Oscar M. Mosquera. "Alkaloids of Crinum x powellii “Album” (Amaryllidaceae) and their Topoisomerase Inhibitory Activity". Zeitschrift für Naturforschung C 62, n.º 3-4 (1 de abril de 2007): 223–26. http://dx.doi.org/10.1515/znc-2007-3-411.
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Abstract The alkaloids lycorine, 1-O-acetyllycorine and ismine were isolated from the basic dichloromethane- soluble fraction of Crinum x powellii “Album” bulbs. The alkaloid structures were established by physical and spectroscopic analyses, including 1D NMR techniques and GCMS analysis. The three alkaloids are reported for the first time for this hybrid. Additionally, the three alkaloids isolated were tested against a mechanism-based bioassay utilizing genetically engineered mutants of the yeast Saccharomyces cerevisiae strains RAD+, RAD52Y and RS321 where lycorine was the only alkaloid that displayed moderate topoisomerase I inhibitory activity.