Дисертації з теми "Psychoneuroimmunology; stress; the oxidative model"
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Vallis, Katherine Anne. "Menadione resistance : a model for cellular defences against oxidative stress." Thesis, University of Edinburgh, 1995. http://hdl.handle.net/1842/20853.
Повний текст джерелаHälldin, Jonas. "Oxidative stress and alterations in the mammalian iron metabolism : a study on iron, inflammation, oxidative stress and neurodegeneration in cellular model systems /." Stockholm : Department of Neurochemistry, Stockholm University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7037.
Повний текст джерелаCrisóstomo, Luís Daniel Machado. "Pilot-model for oxidative post-competition recovery in swimmers." Master's thesis, Universidade da Beira Interior, 2013. http://hdl.handle.net/10400.6/1340.
Повний текст джерелаO treino desportivo com o objetivo de performance competitiva coloca os atletas sob um forte risco de desequilíbrio oxidativo, conhecido por stress oxidativo. A produção de radicais livres e espécies electrofílicas, como as Espécies Reativas de Oxigénio (ROS), são uma constante no metabolismo normal do organismo, no entanto, a maior taxa metabólica exigida pela demanda energética do exercício físico intenso, provocam uma produção de tais espécies a um nível superior às defesas antioxidantes disponíveis. Nesta situação de stress oxidativo, os radicais livres e ROS provocam danos a fulcrais estruturas e macromoléculas celulares, reagindo forte e rapidamente com estas, ameaçando a homeostasia celular. Para controlar a ação nefasta dessas agressões oxidativas, os organismos possuem mecanismos de defesas antioxidantes, podendo estas ser de origem endógena ou exógena. Entre as defesas antioxidantes endógenas encontram-se proteínas expressas pelas células, e cuja expressão pode ser influenciada pelo ambiente oxidativo celular, como é o caso das Glutationa S-Transferases (GST). Desta forma, situações que criem stress oxidativo, como no treino desportivo, ativam a expressão das defesas antioxidantes. Assim sendo, o treino desportivo regular e bem planeado, de forma a evitar danos constantes ao organismo, deve ativar uma resposta deste de forma a protege-lo dessa agressão, preparando-o previamente para essa agressão. Essa preparação pode ser verificada através da expressão génica de fatores antioxidantes endógenos. Além disso, certos genótipos podem revelar-se vantajosos nesta proteção, nomeadamente os genótipos associados às várias isoformas das GSTs. Nestes, constam vários e frequentes genótipos Null (ausência do gene), o que permite uma grande variabilidade entre indivíduos para a disponibilidade de isoformas de GSTs. O objetivo deste trabalho foi precisamente verificar a distribuição de genótipos Null/Present para duas isoformas de GSTs, a GSTM1 e a GSTT1, numa amostra de 20 nadadores portugueses de nível nacional. Para comparação de genótipos, foi recolhida semelhante informação a partir de um grupo de controlo constituído por 52 indivíduos aleatórios. Além disso, observou-se a expressão relativa de GSTT1 ao longo de 5 momentos distintos ao longo da época de Inverno (preparação geral, preparação específica, fase taper e dois momentos pós-competição) em 3 desses atletas, e a expressão relativa, também de GSTT1, 48h e 72h após uma competição, para 8 desses atletas. Para conseguir alcançar isto, foi necessário montar uma técnica totalmente nova para recolher as amostras de forma rápida, fiável e praticável nas condições de treino, e otimizar todos os procedimentos laboratoriais para conseguir processar essas amostras de forma eficiente e rigorosa. As amostras foram recolhidas em papel de filtro de análises clínica, através de uma picada no dedo dos nadadores, antes do início do treino do dia definido previamente para recolha de amostras. As amostras foram ainda conservadas em invólucros individuais para cada recolha a cada momento e de cada atleta, numa câmara-fria 4°C, no Centro de Investigação em Ciências da Saúde (CICS) da Faculdade de Ciências da Saúde (FCS) da Universidade da Beira Interior (UBI). Para genotipagem dos nadadores em amostra, DNA foi extraído da amostra de sangue em papel utilizando o método do Chelex 100. Após extração, o DNA foi usado para amplificação enzimática da sequência específica dos genes da GSTM1 e GSTT1, pela técnica de PCR. Por fim, os resultados foram corridos por electroforese em gel de agarose, usando Green-safe como fator de marcação de DNA, e os resultados foram visualizados à luz ultravioleta num transiluminador. A presença de GSTM1 foi identificada pela presença de uma banda com cerca de 215bp, enquanto a presença de GSTT1 foi identificada pela presença de banda aos 473bp. Para análise da expressão génica, RNA foi isolado a partir das amostras de sangue em papel, pelo método do Trizol. O RNA era correspondente a cada um dos momentos de recolha. De seguida o RNA foi convertido a cDNA através da técnica de transcriptase reversa, utilizando a enzima M-MLV. Por fim, o cDNA foi amplificado pela técnica de RT-PCR, para o gene GSTT1, tendo ainda como controlo a amplificação da β-Actin, também para cada um dos momentos de recolha e fazendo duplicados por uma questão de rigor. A expressão foi calculada através das curvas de amplificação de RT-PCR e utilizando o método ΔΔCT. Não foram encontradas distribuições de genótipos GSTM1 e GSTT1 Null/Present estatisticamente significativas entre a nossa amostra de teste e o grupo de controlo. No contexto da expressão relativa de GSTT1, verificou-se que variações muito acentuadas ao longo da época desportiva ou após um exercício foram prejudiciais à performance física dos nadadores. Encontramos também algumas diferenças na recuperação das nadadoras, mantendo uma expressão mais alta e por um maior período de tempo após o exercício físico intenso que os homens. Além disso, verificou-se uma tendência para os indivíduos GSTM1 Null manterem os níveis de expressão relativa de GSTT1, ao longo da época e após um exercício intenso, mais estáveis, o que parece favorecer o seu rendimento. Conclui-se ainda que a análise da evolução da expressão relativa de GSTT1 em vários treinos, após uma competição ou outro exercício de elevada intensidade, pode ajudar a perceber qual a forma atual de um nadador.
Hung, T. H. "In vitro hypoxia-reoxygenation as a model for placental oxidative stress in preeclampsia." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604788.
Повний текст джерелаMillican, Stephanie A. "Human vascular endothelial cells in culture : a model system for studying oxidative stress." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU554288.
Повний текст джерелаZhong, Wenwen. "Protection against oxidative stress in human endothelial cells in an in vitro diabetes model." Thesis, University of Hull, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431079.
Повний текст джерелаDuggan, Simon. "The role of mitochondria and oxidative stress in a model of coronary artery disease." Thesis, University of Bristol, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.761669.
Повний текст джерелаAlinde, Olatogni Berenice Lidwine. "Effects of red palm oil-supplementation on oxidative stress biomarkers in an experimental rat model." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/2257.
Повний текст джерелаOxidative stress, in recent times appears to be a major underlying risk factor in the occurrence of various diseases such as cardiovascular disease (CVD) and ischemic heart disease (IHD). During oxidative stress, there is an imbalance between the production of reactive oxygen species (ROS) and antioxidant defence mechanisms in favour of ROS. This results in severe cellular damages in the heart, vascular membranes and other organs. Potential benefits of dietary supplements as one of the major quenching elements against oxidative stress have been highlighted. Thus, a growing interest has been stimulated in finding natural alternatives for the treatment and! or prevention of oxidative stress-mediated diseases. Red palm oil (RPO), refined from the tropical plant Elaeis guineensis was used in this study since it has captivated much attention in the health sector lately. The effects of RPO-supplementation on oxidative stress biomarkers as well as homocysteine, a cardiovascular disease risk factor in an oxidative stress-induced rat model were investigated in this in vivo study. All experiments were conducted for a period of six weeks. Male Wistar rats (120-150g) were randomly divided into six groups (n=5) where all the rats received a standard diet. Two groups (groups C, D) were supplemented with 0.175g RPO (7g RPO/kg chow) for four weeks whereas groups (groups E, F) were given 0.175g RPO (7g RPO/kg chow) supplementation for six weeks. Rats in control groups (groups A, B) were not given any RPO-supplementation. Groups B, 0, F were induced with oxidative stress by injection of 0.5ml (20IlM/100g of body weight) organic tertiary-butyl hydroperoxide. All parameters were determined using appropriate methods in plasma, serum and erythrocytes. Data were expressed as mean ± SEM. No significant differences were obtained between groups for total antioxidant capacity and glutathione peroxidase activity. Red palm oil supplementation significantly increased superoxide dismutase activity after 6 weeks consumption, total glutathione levels after 4 weeks consumption and homocysteine levels after four and six weeks consumption in rats not subjected to oxidative stress. Under oxidative stress conditions, malondialdehyde (MOA) level, a marker of oxidative stress related damage, significantly increased in rats receiving a standard diet. However, when RPO diet was supplemented for 4 and 6 weeks, MOA levels significantly decreased towards the value of normal controls. In conclusion, our findings suggest that RPO-supplementation could ameliorate antioxidant status in the body through its potential ability to increase some antioxidant enzymes activity. Similarly, it is suggested that RPO-supplementation could protect the rat against oxidative stress induced damage in diseased state.
Miller, Rebecca Louise. "The mechanism for paraquat toxicity involves oxidative stress and inflammation a model for Parkinson's disease /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4764.
Повний текст джерелаThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Vita. "May 2007" Includes bibliographical references.
Du, Plessis Michelle. "The role of carnitine in eukaryotic cells : Using yeast as a model." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97946.
Повний текст джерелаENGLISH ABSTRACT: Previous studies in yeast in this laboratory have found carnitine to be both protective against oxidative stress induced by hydrogen peroxide and to increase the detrimental effect of dithiothreitol. These phenotypes were found to be independent of the role of carnitine within the carnitine shuttle. A screen for suppressor mutations for these carnitine-dependent phenotypes identified, among others, Δcho2 and Δopi3. Cho2p and Opi3p catalyse the sequential methylation reactions in the formation of phosphatidylcholine from phosphatidylethanolamine. Therefore, this study aimed to investigate the relationship between choline, phosphatidylcholine and the carnitine phenotypes. Liquid growth assays of Δcho2 and Δopi3 cultures revealed that addition of choline can restore the protective effects of carnitine against hydrogen peroxide. The connection between the cellular phospholipid composition and the carnitine-dependent shuttleindependent phenotypes was also investigated. Analysis of the lipid composition of cells by LCMS showed that Δcho2 and Δopi3 had a largely different lipid composition compared with the wild type, most notably, a reduction in phosphatidylcholine and an increase in triacylglycerol content were observed for both mutants. These changes were reversed by supplementation with choline. However, no effects on the lipid composition of cells in response to carnitine treatment were observed, either when supplemented alone or in combination with DTT and hydrogen peroxide. Carnitine has also been investigated in mammalian systems for its potential to protect cells from oxidative stress, an effect which would be of benefit in various neurodegenerative disorders. Several studies have documented the positive effects of carnitine against oxidative stress in mammalian cells however the mechanism behind this action remains unknown. It is therefore thought that, provided similar effects for carnitine can be shown in mammalian cells as was observed in yeast, it would be beneficial to use yeast as a model system for the study of the molecular changes induced by carnitine. In view of this, the effects of carnitine on toxicity induced by oxidative stress in mammalian neural cells were compared to that which has been observed in yeast. For this purpose the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) assay, a measure of reductive capacity of cells, was used. However, no effects for carnitine were observed in the MTT assay in combination with either dithiothreitol or paraquat.
AFRIKAANSE OPSOMMING: Vorige studies op gis in hierdie laboratorium het bevind dat karnitien beskermend is teenoor oksidatiewe stres wat deur waterstofperoksied geïnduseer word en ook die nadelige effek van ditiotreitol verhoog. Hierdie fenotipes is gevind om onafhanklik te wees van die rol van karnitien binne die karnitien-pendel. Die sifting vir onderdrukker-mutasies van hierdie karnitienafhanklike fenotipes het onder andere Δcho2 en Δopi3 geïdentifiseer. Cho2p en Opi3p kataliseer die opvolgende metileringsreaksies tydens die vorming van fosfatidielcholien vanaf fosfatidieletanolamien. Hierdie studie het dus gepoog om die verhouding tussen cholien, fosfatidielcholien en die karnitienfenotipes te ondersoek. Vloeistofanalises van Δcho2- en Δopi3-kulture het aangedui dat die byvoeging van cholien die beskermende effekte van karnitien teenoor waterstofperoksied kan herstel. Die verband tussen die sellulêre fosfolipiedsamestelling en die karnitienafhanklike pendel-onafhanklike fenotipes is ook ondersoek. Die analise van die lipiedsamestelling van selle deur middel van LCMS het getoon dat Δcho2 en Δopi3 ‘n grootliks verskillende samestelling het in vergelyking met die wilde tipe, en daar is veral ‘n afname in fosfatidielcholien en ‘n verhoging in triasielgliserol-inhoud vir beide mutante waargeneem. Hierdie veranderinge is omgekeer deur aanvulling met cholien. Geen effekte op die lipiedsamestelling van die selle is egter in reaksie op die karnitienbehandelings waargeneem nie, hetsy toe dit alleen aangevul is of in kombinasie met ditiotreitol en waterstofperoksied. Karnitien is ook in soogdierstelsels ondersoek vir sy potensiaal om selle teen oksidatiewe stres te beskerm, ‘n effek wat groot voordeel sal inhou vir verskeie neurodegeneratiewe steurings. Verskeie studies het reeds die positiewe effekte van karnitien teen oksidatiewe stres in soogdierselle opgeteken, hoewel die meganisme agter hierdie werking nog onbekend is. Daar word dus vermoed dat, gegewe dat soortgelyke effekte vir karnitien in soogdierselle getoon kan word as wat in gis waargeneem is, dit voordelig sou wees om gis as ‘n modelsisteem vir die studie van die molekulêre veranderinge wat deur karnitien geïnduseer word, te gebruik. In die lig hiervan is die effekte van karnitien op giftigheid wat deur oksidatiewe stres in soogdiersenuselle geïnduseer is, vergelyk met dít wat in gis waargeneem is. Om hierdie rede is die 3-[4,5-dimetieltiasool-2-iel]-2,5-difeniel tetrasoliumbromied (MTT) essaiëring, ‘n meting van die verminderende kapasiteit van selle, gebruik. Geen effekte vir karnitien is egter met die MTT essaiëring in kombinasie met óf ditiotreitol óf parakwat waargeneem nie.
Alonis, Melenie Lee. "Selenotrisulfide Derivative of Alpha-Lipoic acid: Evaluation in a Cell Culture Model for Potential Use as a Topical Antioxidant." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3451.
Повний текст джерелаM.S.
Department of Molecular Biology and Microbiology
Burnett College of Biomedical Sciences
Molecular Biology and Microbiology
Maskiny, Charbel Farid. "Inflammatory Response and Oxidative Stress in Rats Selected for Intrinsic Aerobic Endurance Capacity." University of Toledo Health Science Campus / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=mco1180467082.
Повний текст джерелаKamalvand, Golnar. "Evidence of oxidative stress response in a mouse model of AA amyloidosis : immunolocalization of specific markers." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80297.
Повний текст джерелаThe objective of this research was to identify oxidative stress (OS) markers (heme-oxygenase-1, HO-1; 4-hydroxy-2-nonenal, HNE; Nepsilon -(Carboxymethyl)lysine, CML) in peritoneal mphi and splenic/hepatic RE cells obtained from AHC-infected mice prior to and during AA amyloidosis. Histochemical and peroxidase-immunoperoxidase methods were used to detect the OS markers. High levels of HO-1, an antioxidant enzyme; HNE, a product of lipid peroxidation; and CML, an advanced glycation end product, were found in peritoneal mphi and splenic/hepatic RE cells proximal to AA fibril deposition. HNE and CML deposits were found in both the tissue interstitium and bound to AA amyloid deposits, indicating their possible role in the oxidative alteration of intracellular SAA. OS mediated changes in mphi/RE cells loaded with SAA may prove to be a prelude to nascent intracellular AA fibril formation.
Liu, Beinan. "Iron mediated amyloid beta toxicity and oxidative stress in a Drosophila melanogaster model of Alzheimer's disease." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608978.
Повний текст джерелаFu, Zhongjie, and 傅中捷. "Effect of aldose reductase in an animal model of oxygen-induced retinopathy." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B47869392.
Повний текст джерелаpublished_or_final_version
Anatomy
Doctoral
Doctor of Philosophy
Wilson, Malinda. "Drosophila melanogaster as a model organism for understanding the interrelationship of micronutrient antioxidants and atmospheric oxidative stress /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.
Повний текст джерелаWilliams, Alison Suzanne. "Mechanisms of Oxidative stress induced airways hyperresponsiveness and lung neutrophillia in a murine model of ozone exposure." Thesis, Imperial College London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498241.
Повний текст джерелаLockman, Khalida Ann. "The relationship between oxidative stress, triglyceride accumulation and mitochondrial function in in vitro model of hepatocellular steatosis." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/24849.
Повний текст джерелаTerpstra, Brian T. "Purine Nucleoside Mediated Neuroprotection in the 6-Hydroxydopamine Rodent Model of Parkinson's Disease." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1298395215.
Повний текст джерелаColbert, Kathryn Eileen. "Influence of dietary starches differing in glycemic index on pro-oxidant and anti-oxidant gene expression and insulin sensitivity in a mouse model." Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/COLBERT_KATHRYN_13.pdf.
Повний текст джерелаWanjiku, Samuel Mburu. "Impact of inflammation-induced oxidative stress on the integrity of immuno-haematopoietic cells and potential ameliorating interventions in an in vitro HIV model." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/95467.
Повний текст джерелаENGLISH ABSTRACT: Chronic inflammation and immune activation are hallmarks of HIV infection, resulting in chronic oxidative stress with over-utilization of antioxidant defences, which may contribute to the loss of immune cells and faster disease progression. Low levels of antioxidants in HIV- infected individuals have been associated with frequent opportunistic infections and an increased risk of mortality. HIV infection is also associated with on-going and aberrant activation of both the innate and adaptive immune systems. An important aspect of innate immune stimulation is derived from the leakage of lipopolysaccharide (LPS) across the damaged mucosal lining of the gut in early HIV infection. The impact of this innate immune stimulation on the adaptive arm of the immune system, as represented in this study by levels of CD4+ T-cell activation and death, have not been explored previously in untreated HIV infection. Using an integrated approach of immune activation, inflammation, oxidative stress and ameliorating antioxidant intervention for the first time, this thesis reports the impact of inflammatory induced-oxidative stress on CD4+ T-cells in an in vitro HIV model. In a preliminary study, baseline levels of neutrophil respiratory burst as an in vitro indication of immune stimulation were investigated. The relationships between baseline total antioxidant status (TAS), Red blood cell (RBC) antioxidant enzyme activities (catalase, superoxide dismutase & glutathione peroxidase), lipid peroxidation and glutathione redox ratio and other markers of disease in asymptomatic, untreated HIV infection were also explored. The design and optimization of an assay that could determine the effects of LPS-induced oxidative stress on CD4+ T-cells, was a critical part of this study. The development of this assay enabled the measurement of the effects of selected antioxidant interventions N-acetyl cysteine (NAC) and vitamin C, on LPS-induced CD4+ T-cell activation and death. The results were also correlated with CD4 count, viral load and markers of inflammation (fibrinogen & D-dimers) in HIV-infected and uninfected groups. Neutrophils from HIV-infected persons at rest showed a ―primed‖ response to low stimulating agent, bacterial N-formyl peptides (fMLP), which was significantly (P = 0.04) higher than uninfected individuals. There was increased oxidative stress as evidenced by increased catalase activity, malondialdehyde (MDA) and conjugated dienes (CDs) with a corresponding decrease in antioxidant capacity in HIV-infected individuals with lower CD4 count. NAC in combination with vitamin C, significantly (P = 0.0018) reduced activation of CD4+ T-cells to a greater degree than with either antioxidant alone. NAC and vitamin C individually and in combination significantly (P = 0.05, P = 0.012 and P<0.0001) decreased the expression of the markers of apoptosis, Annexin V and 7-amino-actinomycin (7-AAD). Importantly, the antioxidant combination decreased MDA values and significantly (P = 0.01) increased the glutathione redox ratio in the HIV-infected group. Based on these results, the respiratory burst and LPS-induced activation may be important contributing factors in inflammatory-associated oxidative stress in HIV infection and contribute to the depletion of CD4+ T-cells in the asymptomatic stage of HIV infection. These results also indicate the potential inhibitory effects of NAC and vitamin C in combination as agents that may limit immune activation and inflammation-induced oxidative stress. Importantly, the study showed that at this asymptomatic stage, CD4+ T-cells of the HIV-infected group responded similarly to stimulation as the HIV negative group, indicating that antioxidant defences were still functional and that appropriate early intervention at this stage may be protective against oxidative damage to the immune cells. To the best of our knowledge, this study is the first to use an integrated approach involving not only plasma levels of antioxidant status, but also RBC antioxidant enzyme activities, oxidative damage (lipid peroxidation), inflammation, cellular levels of immune activation and potential ameliorating interventions in evaluating the problem of inflammation-induced oxidative stress in HIV infection. Based on the results of this study, it is envisaged that an insight into the immune activation, inflammatory and oxidative stress status of patients will enable long-term profiling of each patient with a view to individualized therapy. This approach may have a direct impact on patient care in resource-limited settings such as sub-Saharan Africa.
AFRIKAANSE OPSOMMING: Chroniese inflammasie en immuunaktivering is kenmerke van MIV-infeksie. Dié twee prosesse lei tot chroniese oksidatiewe stres en oorbenutting van antioksidant verdedigingstelsels, wat lei tot die verlies van die immuun selle en vinniger siektevordering. Lae vlakke van antioksidante in MIV-positiewe individue stem ooreen met gereelde opportunistiese infeksies en 'n verhoogde risiko van mortaliteit. MIV-infeksie word ook geassosieer met langdurige en abnormale aktivering van beide die ingebore en aanpasbare immuunstelsels. 'n Belangrike aspek van ingebore immuun stimulasie in die raamwerk van vroeë MIV-infeksie, is die lekkasie van LPS oor die beskadigde slymvlies voering van die dunderm. Die impak van die ingebore immuun stimulasie op die aanpasbare arm van die immuunstelsel, soos aangetoon in hierdie studie deur die vlakke van CD4 T-sel aktivering en apoptose, is nog nie voorheen ondersoek in onbehandelde MIV-infeksie nie. Met behulp van 'n oorspronklike, geïntegreerde benadering van immuun aktivering, inflammasie, oksidatiewe stres en 'n lae vlak van antioksidant intervensie, lewer hierdie tesis verslag oor 'n in vitro model van inflammasie-geïnduseerde oksidatiewe stres op CD4 T-selle. In 'n voorlopige studie, is basislyn vlakke van die neutrofiel respiratoriese uitbarsting as 'n in vitro aanduiding van immuunstimulasie ondersoek. Die verhoudinge tussen basislyn totale antioksidant status (TAS), rooi bloed sel (RBC) antioksidant ensiemaktiwiteit (katalase, superoksied dismutase, en glutatioon peroksidase), lipied peroksidasie en glutatioon redoks-verhouding, asook ander merkers van siektevordering in asimptomatiese, onbehandelde MIV-infeksie is ook ondersoek. Die ontwerp en optimisering van 'n toets wat die effek van LPS-geïnduseerde oksidatiewe stres op CD4 T-selle kan bepaal, was 'n kritieke deel van hierdie studie. Die ontwikkeling van hierdie toets het ook die meting van die effek van toevoeging van twee geselekteerde anti-oksidante, N-asetiel sisteïen (NAC) en vitamien C, op LPS-geïnduseerde CD4 T-sel aktivering en apoptose ondersoek. Die resultate is ook gekorreleer met CD4-telling, virale lading en merkers van inflammasie (fibrinogeen en D-dimere) in groepe met en sonder MIV-infeksie. Neutrofiele van asimptomatiese persone met MIV infeksie, het 'n 'voorbereide' reaksie gehad teen ‗n lae stimulerende agent, bakteriële N-formiel peptied (fMLP), wat beduidend (P = 0,04) hoër was as in individue sonder MIV infeksie. Daar was verhoogde oksidatiewe stres soos bewys deur verhoogde katalase aktiwiteit, malondialdehied (MDA) en gekonjugeerde diëne (CDs), saam met 'n ooreenstemmende afname in anti-oksidant kapasiteit in MIV-positiewe individue met laer CD4-tellings. NAC in kombinasie met vitamien C, het die aktivering van CD4 T-selle beduidend verminder (P = 0,0018), 'n effek wat groter was in vergelyking met elke antioksidant alleen. NAC en vitamien C alleen, en in kombinasie het beduidend die uitdrukking van die merkers van apoptose, Annexin V en 7-AAD verminder (P = 0,05, P = 0.012 en P<0,0001). Wat belangrik is, is dat die afname in MDA waardes as gevolg van antioksidante in kombinasie, 'n beduidende styging in die glutatioon redoks verhouding in die MIV-positiewe groep tot gevolg gehad het. Hierdie resultate het aangetoon dat die respiratoriese uitbarsting en LPS-geïnduseerde aktivering belangrike bydraende faktore mag wees in inflammasie-verwante oksidatiewe stres in MIV-infeksie, wat kan bydra tot die uitputting van CD4 T-selle in die asimptomatiese stadium van MIV-infeksie. Hierdie resultate dui ook aan dat die moontlike inhiberende effekte van NAC en vitamien C in kombinasie, immuun aktivering en geïnduseerde oksidatiewe stres kan beperk. Van belang is die feit dat hierdie studie bewys het dat in die asimptomatiese stadium van MIV-infeksie, CD4 T-selle weens stimulasie dieselfde gereageer het as dié van mense sonder MIV infeksie. Dit het aangedui dat antioksidant verdediging in hierdie stadium nog funksioneel was, en dat 'n toepaslike vroeë intervensie op hierdie stadium beskermend teen immuun-sel oksidatiewe skade kan wees. Tot die beste van ons kennis, is hierdie studie die eerste om 'n geïntegreerde benadering te gebruik, waar plasma vlakke van antioksidant status saam met RBC antioksidant ensiemaktiwiteit, oksidatiewe skade (lipied peroksiidasie), inflammasie, sellulêre vlakke van immuunaktivering, en potensiële beskermende ingrypings ondersoek is in die evaluering van die probleem van oksidatiewe stres in MIV-infeksie wat tot inflammasie lei. Gebaseer op dié resultate, word dit in die vooruitsig gestel dat 'n insig in die status van immuunaktivering, inflammasie, en oksidatiewe stress van pasiënte, dit moontlik sal maak vir langtermyn- beplanning om vir elke pasiënt individuele terapie voor te skryf. Hierdie benadering kan 'n direkte impak op die sorg van pasiënte in hulpbron-beperkte gebiede soos sub-Sahara Afrika hê.
Wiedenheft, Blake Alan. "Sulfolobus as a model organism for the study of diverse biological interests forays into thermal virology and oxidative stress /." Diss., Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/wiedenheft/WiedenheftB1206.pdf.
Повний текст джерелаBi, Chongshan. "The role of caveolin-1 phosphorylation in AQP4 membrane expression in a model of oxidative stress in primary astrocyte cultures." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37065.
Повний текст джерелаSklavounou, Evangelia. "Development and characterisation of an in vitro model of oxidative stress-induced cellular senescence and the evaluation of novel antioxidants." Thesis, University of Glasgow, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402011.
Повний текст джерелаLima, Lorena PicanÃo de. "Effects of manual acupuncture and electroacupuncture on oxidative stress and inflammation in experimental model of cutaneous flaps randomised in rats." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13467.
Повний текст джерелаIschemia of the skin flaps increases the morbidity in surgical reconstruction procedures. Injuries resulting from the interruption or reduction of blood flow (ischemia) and are exacerbated by the reintroduction of oxygen-rich blood (reperfusion). Acupuncture (AC) promotes the stimulation of specific body points (acupoints) in order to achieve a therapeutic or homeostatic effect. Electroacupuncture (EA) is the application of electric current of low intensity and variable frequency through the needle inserted into specific acupoints previously. The choice of waveform, frequency and discharge intensity define the type of effect that will be reached. Whereas some published studies have demonstrated the protective effects of AC/EA in the preservation of skin flaps, this study aimed to investigate the effects of AC/EA in inflammation and oxidative stress in randomized skin flaps in rats. Forty rats were used in the study. Thirty-two animals underwent dorsal flap construction (8 x 2.5cm) and then were distributed randomly into 4 groups (n = 8): G-2 (surgical trauma), G-3 (Acupuncture), G -4 (2 Hz EA), G-5 (EA 100 Hz). The remaining 8 rats served as baseline control (G-1). All rats were anesthetized intraperitoneally with ketamine (90mg/kg) + xylazine (10mg/kg) on days 1, 3 and 7. In day 1 stainless steel needles were introduced in DM-14 [Dazhui], DM-2 [Yaoshu] and F-13 [Zhangmen] acupoints bilaterally in G3 rats.The acupoints are located, respectively, on the cranial, caudal edges and near the lateral edge of the skin flap. In G4, after insertion of needles, EA was applied (3Hz, 10 mA) for 30 minutes. The procedures were repeated on days 3 and 7. In G5 a frequency of 100Hz was used. Blood and skin samples were collected at the end of procedures (AC/AE) in groups G3, G4, G5, and after 30 minutes of anesthesia in G1/G2 rats for myeloperoxidase (MPO), malonaldehyde (MDA) and glutathione ( GSH) assays. The results were compared using the t test for unpaired samples. Skin MPO activity decreased significantly in G3 rats (6.41Â1.39 vs. 3.11Â2.80, p<0.001). There was also a significant decrease (6.41Â1.39 vs. 1.19Â0.39) of MPO activity with EA (3 Hz) and 100 Hz (6.41Âvs 1.39Â0.19) compared with G2. Plasma (6.56Â1.32 vs.21.48Â4.40) and tissue (54.15Â3.10 vs. 180.50Â10.35) GSH levels increased significantly in G3 rats. A significant increase in plasma and tissue GSH concentrations ocurred in G4/G5 rats. MDA levels increased significantly in groups G4/G5. Considering these results it is concluded that both AC/EA, applied to healthy rats, attenuate skin inflammatory response and reduce systemic and local oxidative stress, promoting an increase in plasma and tissue concentrations of GSH. On the other hand, EA has pro-peroxidative effect in plasma and skin of healthy rats subjected to surgical stress.
A isquemia dos retalhos cutÃneos aumenta a morbidade dos procedimentos em reconstruÃÃo cirÃrgica. As lesÃes decorrem da parada/reduÃÃo do fluxo sanguÃneo (isquemia) e sÃo agravadas pela reintroduÃÃo de sangue rico em oxigÃnio (reperfusÃo). Acupuntura (AC) promove a estimulaÃÃo de pontos especÃficos do corpo (acupontos) com objetivo de atingir um efeito terapÃutico ou homeostÃtico. Eletroacupuntura (EA) consiste na aplicaÃÃo de corrente elÃtrica de baixa intensidade e frequÃncia variÃvel atravÃs da agulha previamente inserida em determinado acupontos. A escolha do formato da onda, frequÃncia e intensidade da descarga definem o tipo de efeito que serà atingido. Considerando que alguns estudos publicados tÃm demonstrado os efeitos protetores da AC/EA na preservaÃÃo de retalhos cutÃneos, este estudo teve como objetivo investigar os efeitos da AC/EA no processo inflamatÃrio e no estresse oxidativo em retalhos cutÃneos randomizados, em ratos. Quarenta ratos foram utilizados no estudo. Trinta-e-dois animais foram submetidos à construÃÃo do retalho dorsal (8 x 2,5cm) e posteriormente distribuÃdos aleatoriamente em 4 grupos (n = 8): G-2 (trauma cirÃrgico); G-3 (Acupuntura); G-4 (EA 3Hz); G- 5 (EA 100Hz). Os 8 ratos restantes (G-1) serviram como controle basal. Todos os ratos foram anestesiados intraperitonealmente com cetamina (90mg/kg) + xilazina (10mg/kg) nos dias 1, 3 e 7. No dia 1, agulhas de aÃo inoxidÃvel foram introduzidas nos acupontos DM-14[Dazhui], DM-2[Yaoshu] e F-13[Zhangmen] bilateralmente, nos ratos do grupo G3. Esses acupontos se localizam, respectivamente, na borda cranial, caudal e prÃximo ao bordo lateral do retalho. No G4, apÃs a inserÃÃo das agulhas, foi aplicada uma estimulaÃÃo elÃtrica (3 Hz, 10 mA) durante 30 minutos. Os procedimentos foram repetidos nos dias 3 e 7. No G5 utilizou-se uma frequÃncia de 100Hz. Amostras de sangue e de pele foram coletadas ao termino dos procedimentos (AC/EA) nos grupos G3, G4, G5 e apÃs 30 minutos de anestesia nos grupos G1/G2, para dosagens de mieloperoxidase (MPO), Malonaldeido (MDA) e glutationa (GSH). Os resultados foram comparados utilizando-se o teste t para amostras nÃo pareadas. A AC diminuiu a atividade da MPO na pele dos ratos G3 (6,41 1,39 vs. 3,11 2,80, p<0,001). Houve tambÃm diminuiÃÃo significante (p<0,01) com a EA (3 Hz) (6,41Â1,39 vs. 1,19Â0,39, p<0,0001) e 100 Hz (6,41Â1,39 vs. 1,38Â0,19) comparados com o G2. A AC induziu aumento significante das concentraÃÃes de GSH no plasma (6,56Â1,32 vs. 21,48Â4,40) e na pele (54,15Â3,10 vs. 180,50Â10,35). Houve aumento significante as concentraÃÃes plasmÃticas e teciduais nos ratos do G4/G5. A concentraÃÃo de MDA aumentou significantemente nos grupos G4/G5. Considerando os resultados encontrados, conclui-se que a AC/EA atenuam a resposta inflamatÃria na pele e reduzem o estresse oxidativo sistÃmico e local, promovendo o aumento das concentraÃÃes plasmÃticas e teciduais de GSH. Por outro lado, a EA exerce efeito prÃ-peroxidativo no plasma e na pele de ratos sadios, submetidos ao estresse cirÃrgico.
Posgai, Ryan T. "Development of a Drosophila melanogaster model system for nanoparticle toxicity assessment." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1354252918.
Повний текст джерелаMarshall, Craig A., Ivan A. Borbon, and Robert P. Erickson. "Relative efficacy of nicotinamide treatment of a mouse model of infantile Niemann-Pick C1 disease." SPRINGER HEIDELBERG, 2016. http://hdl.handle.net/10150/622828.
Повний текст джерелаOpii, Wycliffe Omondi. "OXIDATIVE STRESS AND REDOX PROTEOMICS STUDIES IN MODELS OF NEURODEGENERATIVE DISORDERS: I. THE CANINE MODEL OF HUMAN AGING; II. INSIGHTS INTO SUCCESSFUL AGING; AND III. TRAUMATIC BRAIN INJURY." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_diss/299.
Повний текст джерелаKunsevi-Kilola, Carine. "The effect of Rooibos on trace elements absorption and biochemical parameters : a murine model." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/2248.
Повний текст джерелаOver the past few decades, it has been shown that various critical diseases including heart disease, cancer, and diabetes associated with free radical generation and low endogenous antioxidant capacity, lead to oxidative stress and cell injury. In recent years, numerous studies have also reported that antioxidants, present in various beverages, vegetables and some foods have attracted a significant research interest due to their potential benefits to human health. However, epidemiological evidence shows a correlation between the intake of food rich in antioxidants and the reduced incidence of some mortality of chronic diseases, certain cancers and coronary heart disease. The aims of this study were to determine the effects of rooibos teas (fermented and unfermented) and green tea as a comparison on the biochemical parameters and the trace element absorption in a rat model. In this study 4 groups of experimental animals were used. All groups had ad libitum access to standard rat chow. Group A, the controls (11 animals), were fed with tap water; group B (11 animals) were fed with the liquid extract of fermented rooibos tea; group C (9 animals) were fed with the liquid extracts of unfermented rooibos and group 0 (9 animals) were fed with the liquid extract of green tea. All groups were fed for a period of 10 weeks. After the feeding period, the animals were sacrificed by euthanization with intraperitoneal injections of pentobarbital. Blood was sampled by cardiac puncture and centrifuged to obtain the serum. Some elemental analyses were performed with X-ray emission and backscattering. ICP-OES was used to determine the magnesium content. For X-ray emission, backscattering and ICP-OES analyses, 100 µL of each serum sample in a group were added to 2 ml freeze-drying tube. Of the combined specimen, 100 µL was used for the magnesium determination by ICP-OES. The remainder of the combined serum specimens for each group were freeze-dried at -80°C and then pressed into a pellet. The pellet was coated with carbon and analyzed using X-ray emission and backscattering. The elemental X-rays of P, S, Ca, Mn, Fe, Cu, Co, Zn, Mo, Ca and Se emitted were quantified to obtain the respective concentrations. Biochemical chemistry analyses were performed on each serum sample of each animal. The biochemical parameters tested for were total protein, albumin, globulin, total bilirubin, lactate dehydrogenase, blood urea nitrogen, uric acid, total cholesterol, aspartate aminotransferase, alanine aminotransferase, creatine phosphokinase and creatinine.
Murphy, Kyle Robert. "Nanosilver and CNT-Nanocomposite Toxicology in an In Vivo Model, D. Melanogaster." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1429977804.
Повний текст джерелаCho, Hyung Joon. "Pro-oxidative and Pro-inflammatory Mechanisms of Brain Injury in Experimental Animal and 3D Cell Culture Model Systems." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73476.
Повний текст джерелаPh. D.
NAGATA, KOHZO, TOYOAKI MUROHARA, SHOGO WATANABE, YUURI TAKESHITA, SAE OHURA, TAMAYO MURASE, TAKUYA HATTORI, MIWA TAKATSU, and KEIJI TAKAHASHI. "Premature Cardiac Senescence in DahlS.Z-Lepr fa/Lepr fa Rats as a New Animal Model of Metabolic Syndrome." Nagoya University School of Medicine, 2014. http://hdl.handle.net/2237/19482.
Повний текст джерелаMizuta, Masanobu. "Effect of the Regulation of Oxidative Stress on Vocal Fold Wound Healing/ Expression of reactive oxygen species during wound healing of vocal folds in a rat model." Doctoral thesis, Kyoto University, 2015. http://hdl.handle.net/2433/199160.
Повний текст джерела0048
新制・課程博士
博士(医学)
甲第18851号
医博第3962号
新制||医||1007(附属図書館)
31802
京都大学大学院医学研究科医学専攻
(主査)教授 別所 和久, 教授 鈴木 茂彦, 教授 瀬原 淳子
学位規則第4条第1項該当
Doctor of Medical Science
Kyoto University
DFAM
Mizuta, Masanobu. "Effect of the Regulation of Oxidative Stress on Vocal Fold Wound Healing / Expression of reactive oxygen species during wound healing of vocal folds in a rat model." Kyoto University, 2003. http://hdl.handle.net/2433/199160.
Повний текст джерелаMaas, Dorothea Adriana. "Myelin Matters in Schizophrenia : Neurobiological Insights from Rat Model and Human Studies." Thesis, Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=http://theses-intra.upmc.fr/modules/resources/download/theses/2019SORUS530.pdf.
Повний текст джерелаSchizophrenia (SZ) is a severe psychiatric disorder and its cognitive symptoms arise from prefrontal cortex (PFC) dysfunctioning and involve altered myelination and interneuron abnormalities. In Chapters 1 and 2 of this thesis, I have introduced the hypothesis that the myelination of parvalbumin interneurons is affected in SZ and that that high levels of oxidative stress interfere with the differentiation of oligodendrocytes (OLs) and as such hinder proper myelination. Using the APO-SUS rat model, in Chapter 3, I showed that PFC-dependent cognitive behaviour is impaired, there is an OL differentiation defect and parvalbumin interneuron hypomyelination in the APO-SUS PFC, and that environmental enrichment (EE) can restore OL differentiation, myelination and cognitive behaviour in APO-SUS rats. In Chapter 4, I show that there is oxidative stress in APO-SUS mPFC, and that this partially underlies the APO-SUS OL differentiation defect. Notably, antioxidant treatment rescued oxidative stress, interneuron myelination as well as cognitive defects in APO-SUS rats. Myelin membranes consist mainly of lipids, accordingly in Chapter 5 I show altered expression of lipid-related genes in SZ PFC, I identified shared genetic etiology between SZ and lipids, and showed that reduced cognitive performance of SZ patients was correlated with a decreased lipid content in the PFC
Ozolins, Terence Robert Stanislavs. "Regulation of the transcription factor activator protein-1 (AP-1) in the whole rat embryo culture model in response to oxidative stress." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0015/NQ44545.pdf.
Повний текст джерелаMaglara, Antonia. "An investigation of the role of oxidative stress and the potential protective effect glutamine supplementation in an animal model of systematic inflammation." Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269718.
Повний текст джерелаCanda, Bartolomeu David. "Modulation of oxidative stress by rooibos (aspalathus linearis) herbal tea, chinese green (camellia sinensis) tea and commercial tea supplements using a rodent model." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/1506.
Повний текст джерелаHuman and experimental animal studies have shown that biomarkers of oxidative damage are elevated in subjects with certain diseases or risk factors. Consequently, it is hypothesized that oxidative stress plays an important role in the pathogenesis of these diseases and that dietary intake of, or supplementation with antioxidants may be protective or be useful therapeutic targets. This study was designed to investigate the modulatory effect of Camellia sinensis (Chinese green tea), Aspalathus linearis (rooibos herbal tea) and the two commercial supplements on the antioxidant status of the liver and kidney of tert-butyl hydroperoxide (t-BHP)-induced oxidative stress male Wistar rats. Rooibos and green tea are beverages well-known for their antioxidant content. Based on the specific beverage consumed, sixty male Wistar rats were randomly assigned into six groups, i.e. fermented rooibos (FRT), unfermented rooibos (URT), Chinese green tea (CGT), rooibos supplement (RTS), Chinese green tea supplement (GTS) and control (CTL). The animals had free access to the respective beverages and standard diet for 10 weeks, while oxidative stress was induced during the last 2 weeks via intraperitoneal injection of 30 μM of t-BHP per 100 g body weight. Among all the beverage and/or supplement preparations, the commercial rooibos supplement had the highest total polyphenol content and antioxidant activity while fermented rooibos, as previously shown, had a lower antioxidant content and potency when compared to its unfermented counterpart. The ability of these beverages and/or supplements to modulate the antioxidant status in tissues was organ specific and varied according to the assessment method. When considering the liver, the intake of unfermented rooibos, Chinese green tea and the commercial rooibos supplement significantly (P<0.05) restored the t-BHP-induced reduction and increased the antioxidant status with regards to oxygen radical absorbance capacity and trolox equivalent antioxidant capacity (TEAC) levels. All the beverages and/or supplements also significantly (P<0.05) enhanced the renal antioxidant capacity as assessed by the TEAC assay. In what may be an indication of decreased oxidative stress, all the beverages were associated with a general decline in activities of the antioxidant enzymes which reached significant levels in renal superoxidase dismutase activity. Generally, the beverages did not impact significantly on lipid peroxidation (LPO) although there were differing trends in the two LPO markers assessed. While thiobarbituric acid reactive substances levels showed a declining trend in both tissues, the conjugated dienes were generally elevated. In conclusion, this study confirms Camellia sinensis and Aspalathus linearis as well as their two supplements as good sources of dietary antioxidants and results demonstrated that rooibos and green tea improved the liver and kidney antioxidant capacity of oxidative stress-induced rats. Their impact on antioxidant status in rats was shown to vary between organs and according to the method of assessment. Hence multi-method, multi-organ assessment may be a more informative approach in in vivo antioxidant studies.
Paliobeis, Andrew S. "Effects of Pramlintide on Mitochondrial Dynamics and Health in the Alzheimer's Disease APP/PS1 Mouse Model." Kent State University Honors College / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1494262713896063.
Повний текст джерелаSteed, Kevin Sage. "Alzheimer's Disease and Diabetes: A Transgenic Mouse Model in Behavior, MRI, and Cells." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7460.
Повний текст джерелаSanjuán, Vázquez Myriam. "Study of proteins implicated in centronuclear myopathies by using the model of yeast Saccharomyces cerevisiae." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ021.
Повний текст джерелаCentronuclear myopathy (CNM) is a group of genetic disorders characterized at the histological level by nuclei at the center of the myofibers instead of the periphery. Mutations in three genes (MTM1, DNM2 and BIN1) are associated with this pathology. Recently the implication of a new gene has been revealed in a congenital myopathy, the PYROXD1 gene.However, the molecular basis responsible for the imbalance inside the cell remains unclear and the relation between the histological level and the symptoms in patients is not understood. Moreover, there is no treatment available for these diseases.During my thesis I have focused my work on using yeast S. cerevisiae model to understand three proteins associated to CNM: the myotubularin Mtm1, the oxidoreductase Pyroxd1 and the dynamin Dnm2. These data reveal that it is possible to use a single eukaryote cell to elucidate some molecular aspects of these proteins implicated in human disorders
González, Alberth Jonnathan Carreño. "Avaliação da atividade neuroprotetora do ácido clorogênico no hipocampo de ratos wistar, submetidos a status epilepticus por lítio-pilocarpina." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/59/59134/tde-10052017-144511/.
Повний текст джерелаEpilepsy is a disorder characterized by paroxysmal self-sustained and recurrent brain events, featuring electro-clinical and neuropathological phenomena unique, which may change the structure and functioning of the brain, whose manifestations are different. It affects about 50 million people worldwide. Animal models and are important biological tools for understanding neuronal injury. It is known that soon after the administration of Li-Pilo in rats - status epilepticus (SE), starts a chain of neurochemical events such as the production of free radicals, among others, that may worsen or perpetuate the subsequent seizures. The use of antioxidant agents acting on the central nervous system can alternatively mean a co-adjuvant in secondary preven-tion of epilepsy, laboratory animals and possibly humans. In our study we evaluated the antioxi-dative action and chlorogenic acid (CA) neuroprotective using Litio-Pilocarpine in vivo, in rats. It compared the effects of CA in addition to the effect of an antioxidant, ascorbic acid. By treating the animals with CA (30 mg / kg), a significant decrease in [F (7, 40) = 14.42; P <0.0001], the production of MDA, important product of lipid peroxidation; as well as a significant decrease in [F (7,40) = 11.26; P <0.0001] (50%), the activity of SOD, an enzyme that acts as an endogenous antioxidant. The action of CA, decreasing the concentration of MDA (49%), which is one of the SOD substrates, would lead to a lower rate of SOD (72%). Thinking about what happens to a drug that inhibits this peroxidation cascade, these results are consistent with the literature, in which it points out that the action of SOD can be directly related to the presence of MDA. Furthermore, it was found that the CA (30 mg / kg) protected the hippocampus cells, or significantly decreased cell loss in CA3 [F (4,25) = 15.55; P <0.0001] (59%), and hilus regions of the hippocampus [F (4,25) = 6.276, P <0.0001] (48%). Likewise, a significant reduction in neu-ronal degeneration (Fluoro Jade C +) in the CA3 [F (2,15) = 40.90; P <0.0001] (75%). We con-clude that the CA is an effective inhibitor of the proliferation of oxidizing agents, leading to cell death when compared to the ascorbic acid in the hippocampus of Wistar rats when induced SE with Li-Pilo. However, CA was neuroprotector in this model.
Khan, J. "Investigation into the effects of specific muscarinic acetylcholine receptor antagonists on the myocardium in pre-clinical conditions of ischaemia reperfusion injury and oxidative stress model." Thesis, Coventry University, 2015. http://curve.coventry.ac.uk/open/items/3508a32c-8427-4ffe-9134-704a3e8c304b/1.
Повний текст джерелаRatti, James A. "INVESTIGATING SMOKE EXPOSURE AND CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) WITH A CALIBRATED AGENT BASED MODEL (ABM) OF IN VITRO FIBROBLAST WOUND HEALING." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5441.
Повний текст джерелаHelou, Doumet. "Rôle du facteur de transcription Nrf2 dans la régulation des fonctions du neutrophile in vitro et dans l’allergie cutanée." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS305/document.
Повний текст джерелаNeutrophils form the first line of defense against infectious agents. However, their uncontrolled activation may exacerbate certain inflammatory conditions such as cutaneous allergies. Our team has previously shown that Nrf2 transcription factor known for its antioxidant role, regulates skin inflammation in contact hypersensitivity (CHS). Thus, our work was carried out to evaluate in vitro the involvement of Nrf2 pathway in neutrophil functions and to identify Nrf2 role in neutrophil recruitment and activation in CHS.In vitro, we showed that the protein Nrf2 was highly expressed in bone marrow neutrophils. Nrf2 is functional in stimulated neutrophils: it activates the transcription of cytoprotective genes and downregulates that of inflammatory genes. Thus, pretreatment of neutrophils with an Nrf2 activator such as sulforaphane reduces the production of reactive oxygen species (ROS) in response to stimulation. In parallel, Nrf2 does not affect two key functions of neutrophil, phagocytosis and netosis.Finally, Nrf2 is essential for optimal migration of neutrophils toward chemokines. In CHS induced by the dinitrochlorobenzene (DNCB), Nrf2 indirectly regulates the recruitment of neutrophils, through regulation of skin oxidant stress and inflammatory pathways that are involved in chemokines production, including CCL2, CCL4 and CCL11. In addition, Nrf2 induces the up-regulation of scavenger CD36 in macrophages and thus increases their ability to eliminate apoptotic neutrophils leading to the resolution of inflammation.In conclusion, Nrf2 activation in neutrophils participates in the control of ROS production and migration. In addition, Nrf2 emerges as an important effector in the control of neutrophil recruitment and clearance during the skin inflammatory response to allergenic molecules. The demonstration of Nrf2 protective mechanisms leads us to suggest this protein as a new therapeutic target in the control of chronic skin inflammations
Adhikari, Rajan Deep. "MRI T2 Signal Changes Indicate Tau Pathophysiology in a Murine Alzheimer's Disease Model." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6944.
Повний текст джерелаQueiroz, Ana Isabelle de Gois. "Efeitos do dimesilato de lisdexanfetamina em ratos: relevÃncia como modelo animal do episÃdio de mania." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10261.
Повний текст джерелаO Transtorno Afetivo Bipolar à um transtorno mental severo que acomete cerca de 1,5% da populaÃÃo mundial e se caracteriza pela oscilaÃÃo de humor entre a depressÃo e a mania, interferindo no desempenho do indivÃduo em termos pessoais e profissionais, bem como sendo responsÃvel por alto nÃmero de suicÃdios. Todos esses fatores o caracterizam como um problema de saÃde pÃblica. Seu mecanismo fisiopatolÃgico ainda nÃo à totalmente conhecido e o arsenal terapÃutico atual ainda à escasso, necessitando de contÃnuas pesquisas nesse Ãmbito. Observando a necessidade de maior disponibilidade de modelos animais de mania para maiores pesquisas à que o estudo objetivou investigar um novo modelo animal de mania. O desenho experimental da pesquisa seguiu os critÃrios para determinar um modelo animal que sÃo: a validade de face (onde busca-se mimetizar no animal comportamento caracterÃstico na doenÃa), validade de constructo (a fisiopatologia da doenÃa) e a validade preditiva ( se os medicamentos jà estabelecidos para determinada doenÃa sÃo capazes de reverter e prevenir os efeitos do fÃrmaco que induz a patologia). Logo, o presente trabalho se propÃs a investigar a atividade do Dimesilado de Lisdexanfetamina (LDX), prÃ-fÃrmaco que ao ser metabolizado a d-anfetamina passa a exercer sua atividade psicoestimulante como possÃvel agente em um modelo animal de mania. O tratamento com D-ANF induz hiperlocomoÃÃo e à considerado como um modelo animal de mania bipolar jà estabelecido. Por isso, procurou-se determinar as alteraÃÃes comportamentais e de estresse oxidativo induzidas pela administraÃÃo via oral sub-crÃnica de LDX, bem como a reversÃo e prevenÃÃo deste efeito ao tratar os ratos com lÃtio, medicamento protÃtipo como estabilizante do humor. Um aumento significativo no comportamento locomotor foi induzido por LDX (10 e 30 mg/Kg). Para determinar os efeitos de LÃtio (Li) nas alteraÃÃes induzidas por LDX nos ratos do grupo reversÃo, o protocolo seguiu a administraÃÃo de LDX (10 ou 30 mg / Kg) ou soluÃÃo salina durante 14 dias. Entre os dias 8o e 14o os animais receberam Li (47,5 mg / kg, ip) ou soluÃÃo salina. No protocolo de prevenÃÃo, os ratos foram prÃ-tratados com soluÃÃo salina ou Li antes da administraÃÃo de LDX. Os nÃveis de Glutationa Reduzida (GSH) e de peroxidaÃÃo lipÃdica foram determinados no cÃrtex prÃ-frontal (PFC), hipocampo (HC) e estriado (ST) de ratos. Constatou-se que o LÃtio preveniu a hiperlocomoÃÃo induzida por LDX, nas doses de 10 e 30 mg/kg, mas somente reverteu a hiperlocomoÃÃo quando utilizada a dose de 10 mg/ kg de LDX. AlÃm disso, ambas as doses de LDX diminuÃram o conteÃdo de GSH (em ST e PFC), enquanto que Li foi capaz de reverter e prevenir estas alteraÃÃes, principalmente no PFC. LDX (10 e 30 mg / kg) aumentou a peroxidaÃÃo lipÃdica, que foi revertida e prevenida por Li. Diante dos resultados em termos de hiperlocomoÃÃo e estresse oxidativo demonstrou-se que o LDX conseguiu induzir tais parÃmetros, se mostrando como uma promessa de modelo animal alternativo de mania.
Wu, Wing Man. "An investigation into the neuroprotective effects of estrogen and progesterone in a model of homocysteine-induced neurodegeration." Thesis, Rhodes University, 2006. http://hdl.handle.net/10962/d1003284.
Повний текст джерелаBader, Lange Miranda Lu. "IN VIVO OXIDATIVE STRESS IN ALZHEIMER DISEASE BRAIN AND A MOUSE MODEL THEREOF: EFFECTS OF LIPID ASYMMETRY AND THE SINGLE METHIONINE RESIDUE OF AMYLOID-β PEPTIDE". UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/117.
Повний текст джерелаSanders, Lisa Merle. "Effects of dietary fat and fiber on the oxidative status of the small intestine and colon of rats." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/3764.
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