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Liver X receptors and epididymal epithelium physiology

Asian Journal of Andrology 2007年第4期9卷 574-582页

作者： Fabrice Saez Eléore Chabory Rémi Cadet Patrick Vernet Silvère Baron2 Jean-Marc A. Lobaccaro Joeol R. Drevet laboratoire Epididyme et Maturation des Gamètes and Centre de Recherche en Nutrition Humaine d＇Auvergne Université Blaise Pascal CNRS UMR 6547 Aubiere Cedex 63177 France laboratoire de Physiologie Cellulaire et d＇Endocrinologie Moléculaire and Centre de Recherche en Nutrition Humaine d＇Auvergne Université Blaise Pascal CNRS UMR 6547 Aubiere Cedex 63177 France

Aim： To investigate the roles of liver X receptors （LXR） in the lipid composition and gene expression regulation in the murine caput epididymidis. LXR are nuclear receptors for oxysterols, molecules derived from cholesterol metabolism that are present in mammals as two isoforms： LXRα, which is more specifically expressed in lipid-metabolising tissues, such as liver, adipose and steroidogenic tissues, and macrophages, whereas LXRβ is ubiquitous. Their importance in reproductive physiology has been sustained by the fact that male mice in which the function of both LXR has been disrupted have fertility disturbances starting at the age of 5 months, leading to complete sterility by the age of 9 months. These defects are associated with epididymal epithelial degeneration in caput segments one and two, and with a sperm midpiece fragility, leading to the presence of isolated sperm heads and flagella when luminal contents are recovered from the cauda epididymidis. Methods： The lipid composition of the caput epididymidis of wild-type and LXR-deficient mice was assessed using oil red O staining on tissue cryosections and lipid extraction followed by high performance liquid chromatography or gas chromatography. Gene expression was checked by quantitative real time polymerase chain reaction. Results： Using LXR-deficient mice, we showed an alteration of the lipid composition of the caput epididymidis as well as a significantly decreased expression of the genes encoding SREBPlc, SCD1 and SCD2, involved in fatty acid metabolism. Conclusion： Altogether, these results show that LXR are important regulators of epididymal function, and play a critical role in the lipid maturation processes occurring during sperm epididymal maturation. （Asian J Androl 2007 July; 9： 574-582）

关键词： epididymis liver X receptors nuclear receptors lipids cholesterol gene expression

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Psychological Distress in Moroccan Patients with Hematological Malignancies and Its Impact on Their Quality of Life

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Psycho-Oncologie 2023年第4期17卷 235-244页

作者： Maha Ouazzani Zineb El Khammar Nawal Oubelkacem Youssef Aboussaleh Hajar Masrour Moncef Maiouak Rhizlane Berrady laboratoire de nutrition Santéet EnvironnementDépartement de BiologieFacultédes SciencesUniversitéIbn TofailKenitra14000Maroc Service de Médecine Interne et D’oncohématologie CHU Hassan IIFès30050Maroc laboratoire D’épidémiologie Facultéde Médecine et de Médecine DentaireFès30050Maroc

Introduction:la qualitéde vie des patients suivis pour une hémopathie maligne dépend non seulement du type de la maladie,de ses caractéristiques cliniques,biologiques et thérapeutiques,mais aussi de la santémentale du patient.L’objectif de notreétude est d’évaluer l’état psychologique des patients au diagnostic,de rechercher les facteurs associésàson altération et de préciser son impact sur la qualitéde vie des patients.Méthode:nous avons menéuneétude monocentrique transversale quiévalue la dépression,l’anxiétéet la qualitéde vie d’une population de patients atteints de syndromes lymphoprolifératifs sur une période de *** questionnaires ontétéutilisés au moment du diagnostic:le HADS pour rechercher la dépression et l’anxiétéet le SF12échelle pourévaluer la qualitéde vie liéeàla santé.Résultat:Les cent patients ont acceptéde répondre aux *** patients sont suivis pour un lymphome malin non hodgkinien,une maladie de Hodgkin,et une leucémie lymphoïde *** sex-ratio(H/F)est de 1,*** prévalence des symptômes anxieux est de 70%avec 95%CI(61,01%;78,99%)et des symptômes dépressifs de 76%avec 95%CI(49,4%;82,6%)des *** analyse univariée,le caractère féminin est associéaux symptômes anxieux(p=0,008),etàl’altération de qualitéde vie mentale(p=0,02).Alors qu’en analyse multivariée,Les symptômes anxio-dépressifs sont significativement associésàun score de qualitéde vie faible aussi bien mentale que *** plus les symptômes anxieux sont corrélés au sexe féminin(ORA=20,50;95%CI[1,58–264,48]);et la douleur(ORA=12,33;95%CI[1,07–141,77]).Conclusion:la recherche de comorbidités psychologiques doit faire partie du diagnostic initial de cette population vulnérable pour une meilleure qualitéde vie.

关键词： Dépression anxiété qualitéde vie liéàla santé lymphome

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Antioxidant and antibacterial activities and identification of bioactive compounds of various extracts of Caulerpa racemosa from Algerian coast

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Asian Pacific Journal of Tropical Biomedicine 2020年第2期10卷 87-94页

作者： Louiza Belkacemi Mahmoud Belalia Ali C.Djendara Youcef Bouhadda laboratoire de Technologie Alimentaire et de nutrition Site II EX-INES de ChimieChemin des CrêtesBP 188Abdelhamid IbnBadis UniversityMostaganemAlgeria laboratoire de Structure Elaboration et Application des Matériaux MoléculairesSite II EX-INES de ChimieChemin des CrêtesBP 188Abdelhamid IbnBadis UniversityMostaganemAlgeria laboratoire de Chimie Physique des Biomolécules et Interfaces Biologiques B.P.305Route de MamouniaMustapha Stambouli University MascaraAlgeria

Objective:To evaluate the antibacterial and antioxidant activities and to identify the volatile bioactive compounds present in different crude extracts of the seaweed Caulerpa racemosa ***:Caulerpa racemosa harvested from the intertidal zone of Mostaganem coast(N 35?54’37.94",E 0?3’17.37")was subjected to Soxhlet extraction using methanol,chloroform,and hexane *** properties were assessed by using 2,2’-diphenyl-1-picrylhydrazyl(DPPH),2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS)andβ-carotene bleaching *** antibacterial activity was evaluated on six standard bacterial strains using the agar disc diffusion *** GC-MS analysis was performed using non-polar and polar capillary ***:The chloroform extract of Caulerpa racemosa exhibited higher contents of polyphenols[(123.91±1.46)mg gallic acid equivalent/g dry extract]and tannins[(59.28±5.43)mg catechin equivalent/g dry extract](Pdecanoate and 4-hydroxy-2 methylproline were among the most abundant volatile *** conventional fatty acids,cis-10-heptadecenoic acid,nonahexacontanoic acid,and dodecanoic acid,3-hydroxy-were *** phytosterols were identified:stigmast-5-en-3-ol-(12.9%)and ***.-ol,(24 S)-(4.57%).Conclusions:The preliminary identification of the volatile compounds reveals the presence of some new bioactive components not reported previously in Caulerpa racemosa from other geographical *** of these compounds possess an interesting potential for pharmaceutical/nutraceutical applications.

关键词： Caulerpa racemosa var.cylindracea West Algerian coast Biological activities Clionasterol 4-Hydroxy-2methylproline

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Identification of biomarkers of human pancreatic adenocarcinomas by expression profiling and validation with gene expression analysis in endoscopic ultrasound-guided fine needle aspiration samples

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World Journal of Gastroenterology 2006年第21期12卷 3344-3351页

作者： Henrik Laurell Michèle Bouisson Philippe Berthelémy Philippe Rochaix Sébastien Déjean Philippe Besse Christiana Susini Lucien Pradayrol Nicole Vaysse Louis Buscail INSERM U531 IFR31 Institut Louis BugnardBP 8422531432 Toulouse Cedex 4France Service de Gastroentérologie Centre Hospitaller de Pau PauFrance laboratoire d'Anatomo-Pathologie Institut Claudius Regaud ToulouseFrance laboratoire de Statistique et Probabilités Université Paul Sabatier ToulouseFrance INSERM U531 IFR31 Institut Louis BugnardBP 8422531432 Toulouse Cedex 4France Service de Gastroenterologie et de la NutritionCHU RangueilToulouseFrance

AIM： To compare gene expression profiles of pancreatic adenocarcinoma tissue specimens, human pancreatic and colon adenocarcinoma and leukemia cell lines and normal pancreas samples in order to distinguish differentially expressed genes and to validate the differential expression of a subset of genes by quantitative real-time RT-PCR （RT-QPCR） in endoscopic ultrasound-guided fine needle aspiration （EUS-guided FNA） ***： Commercially dedicated cancer cDNA macroarrays （Atlas Human Cancer 1.2） containing 1176 genes were used. Different statistical approaches （hierarchical clustering, principal component analysis （PCA） and SAM） were used to analyze the expression data. RT-QPCR and immunohistochemical studies were used for validation of ***： RT-QPCR validated the increased expression of LCN2 （lipocalin 2） and for the first time PLAT （tissue-type plasminogen activator or tPA） in malignant pancreas as compared with normal pancreas. Immunohistochemical analysis confirmed the increased expression of LCN2 protein localized in epithelial cells of ducts invaded by carcinoma. The analysis of PLAT and LCN2 transcripts in 12 samples obtained through EUS-guided FNA from patients with pancreatic adenocarcinoma showed significantly increased expression levels in comparison with those found in normal tissues, indicating that a sufficient amount of high quality RNA can be obtained with this ***： Expression profiling is a useful method to identify biomarkers and potential target genes. Molecular analysis of EUS-guided FNA samples in pancreatic cancer appears as a valuable strategy for the diagnosis of pancreatic adenocarcinomas.

关键词： Pancreas Colon Adenocarcinoma Gene expression profiling Endoscopic ultrasonography Ultrasound Fine needle aspiration

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Effects of extracts from Hibiscus macranthus and Basella alba mixture on testosterone production in vitro in adult rat testes slices

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Asian Journal of Andrology 2006年第1期8卷 111-114页

作者： Paul E Moundipa Silvère Ngouela Pierre Kamtchouing Etienne Tsamo Félicité M.Tchouanguep Serge Carreau Laboratory of nutrition and Biochemical Toxicology Laboratory of Organic Chemistry department of Animal Biology and Physiology University of Yaoundé IP.O.Box 812YaoundéCameroon Faculty of Science University of DschangP.O.Box 67DschangCameroon USC INRA-EA 2608.laboratoire de Biochimie Esplanade de la paixUniversité de Caen14032 Caen-cedexFrance

Aim： To find an in vitro system for the measurement of the androgenic effects of different extracts of Hibiscus macranthus （Malvaceae） and Basella alba （Basellaceae）. Methods： The production of testosterone from testes slices incubated in two media, either Krebs-Henseleit buffer containing 0.5% Bovine serum albumin （BSA） or Dubecco＇s Modified Eagle＇s medium-F12 Ham nutrient mixture （DME/Ham F12）, under a mixture of 5% CO2 in 95% air was determined either in the presence or absence of cofactors and Hibiscus macranthus plus Basella alba （HMBA） extracts. Results： The testosterone production was increased in testes slices incubated in DME/Ham F12 medium in response to the cofactors （49%） and aqueous extracts （34%-60% according to dilutions）. Under the same atmospheric conditions, there was no positive response of the testes slices to either cofactor or HMBA extract stimulation in Krebs-Henseleit buffer containing 0.5% BSA, In further investigations related to the effect of HMBA, the DME/ Ham F12 medium was used. The results obtained from the in vitro test showed that the activity was present mainly in methylene chloride and methanol, since these extracts induced an increase in testosterone production by testes slices. Conclusion： The testes slice system is suitable to be used for further in vitro investigations of the isolation of androgenic bioactive components of plants. （Asian J Androl 2006 Jan; 8： 111-114）

关键词： testis testosterone plant extracts Hibiscus macranthus Basella alba

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Chemical constituents, cytotoxic, antifungal and antimicrobial properties of Centaurea diluta Ait. subsp. algeriensis(Coss. & Dur.) Maire

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Asian Pacific Journal of Tropical Medicine 2016年第6期9卷 537-543页

作者： Hanene Zater Joelle Huet Veronique Fontaine Samir Benayache Caroline Stevigny Pierre Duez Fadila Benayache Unite de recherche : Valorisation des Ressources Naturelles Molecules Bioactives et Analyses Physicochimiques et Biologiques (VARENBIOMOL) Faculte des Sciences Exactes Universite Freres Mentouri Constantine 125000 ConstantineAlgerie Universite Ziane Achour Cite du 5 JuilletRoute Moudjbara BP:311717000 DjelfaAlgerie laboratoire de Pharmacognosie de Bromatologie et de Nutrition Humaine Universite Libre de Bruxelles (ULB)1050 BruxellesBelgique laboratoire de Biopolymere et nanomateriaux supramoleculaire Universite Libre de Bruxelles (ULB)1050 BruxellesBelgique Unite de Microbiologie Pharmaceutique et Hygiene Faculte de Pharmacie Universite Libre de Bruxelles (ULB)1050 BrxellesBelgique Service de Chimie Therapeutique et de Pharmacognosie Universite de Mons (UMONS)7000MonsBelgique

Objective:To investigate the chemical composition of a moderately polar extract(CHC1_3 soluble part of the MeOH-H_2O extract) obtained from the aerial parts(leaves and flowers) of Centaurea diluta ***(Coss.& Dur.) Maire,a species endemic to Algeria and Morocco on which no reports are available to *** evaluate in vitro the cytotoxic,antifungal and antimicrobial activities of this extract and the cytotoxic and antimicrobial activities of its isolated secondary ***:The cytotoxic effects of the extract were investigated on 3 human cancer cell lines *** A549 non-small-cell lung carcinoma(NSCLC),the MCF7 breast adenocarcinoma and the U373 glioblastoma using a MTT colorimetric *** data allowed to guide the fractionation of the extract by separation and purification on silica gel 60(CC and TLC).The isolated compounds which were characterized by spectral analysis,mainly HR-ESIMS,HR-EIMS,UV and NMR experiments(~1H,^(13)C,COSY,ROESY,HSQC and HMBC) and comparison of their spectroscopic data with those reported in the literature,were evaluated for cytotoxic activities on six cancer cell lines(A549,MCF7,U373,Hs683 human glioma,PC3 human prostate and B16-F10 murine melanoma).The direct and indirect antibacterial and antifungal activities were determined using microdilution methods for the raw extract and TLC-bioautography and microdilution methods against standard and clinical strains for the isolated ***:The raw extract reduced cell viability with IC_(50)s of 27,25 and 21 μg/mL on A549,MCF7 and U373,*** secondary metabolites:two phenolic compounds(vanillin 1,paridol 3),a lignan[(-)-arctigenin 2]and two flavonoid aglycones(eupatilin 4 and jaceosidin 5),were then isolated from this *** cytotoxic effects were observed for(-)-arctigenin 2(IC_(50)s:28 and 33μM on Hs683 and B16-F10,respectively),eupatilin 4(IC_(50)s:33 and 47 μM on B16-F10 and PC3,respectively) and jaceosidin 5(IC_(50)s:32 a

关键词： Flavonoids Lignans Centaurea diluta Asteraceae Cytotoxic activity Direct and indirect antimicrobial activity MRSA

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Intracellular behaviour of samarium and europium in lactating mammary gland

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Journal of Rare Earths 2012年第3期30卷 274-277页

作者： Ayadi Ahlem Maghraoui Samira El Hili Ali Galle Pierre Tekaya Leila laboratoire de physiologie Faculté de Médecine de Tunis. 15 rue Djebel lakhdhar. 1007 La Rabta. Tunis. Université Tunis El Manar Tunisie laboratoire de microscopie électronique Faculté des Sciences de Tunis Campus universitaire 2092 El Manar II Tunis Université Tunis El Manar Tunisie. Université Tunis El Manar Tunisie Universidade Estdual de Santa Cruz CNPq rod. Ilheus-Itabuna Km. 16 Ilheus Ba. Brasil

The subcellular localization of samarium and europium, two rare-earths, increasingly used in both medical and industrial fields, has been studied in several organs such as liver and kidney but never in the mammary gland despite of its importance in the biology of lactation and nutrition domains. The intracellular behaviour of samarium and europium after their intra-peritoneal administration in the lactating mammary gland cells was investigated. The results showed the presence of very electron dense deposits in the glandular epithelial cell lysosomes. These particular lysosomes were never observed in the mammary cell lysosomes of control rats. These intralysosomal deposits were probably composed of insoluble samarium or europium phosphates by analogy with previous studies, the transmission electron microscopy, the ion mass microscopy and the electron probe microanalysis, and other techniques allowing the identification of the chemical structure of the intralysosomal deposits.

关键词： samarium europium transmission electron microscopy (TEM) lysosome mammary gland lactation rare earths

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Functional properties of peptides obtained from whey proteins by ficin extract hydrolysis

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Food Bioscience 2022年第3期47卷 918-927页

作者： Afaf Kheroufi María E.Brassesco Débora A.Campos Halima Boughellout Manuela E.Pintado laboratoire de Génie Agro-alimentaire équipe Génie des Procédés AlimentairesBiodiversité et Agro environnementInstitut de la Nutritionde l’Alimentation et des Technologies Agroalimentaires INATAAUniversité Frères Mentouri Constantine 1BP 325 Route de Ain El BeyConstantineAlgeria CBQF – Centro de Biotecnologia e Química Fina – Laboratório Associado Escola Superior de BiotecnologiaUniversidade Católica Portuguesa/PortoRua de Diogo Botelho 13274169-005PortoPortugal

Enzymatic whey proteins concentrates (WPC) hydrolysis under optimal conditions of ficin crude extract (FCE) in two ratios E/S (0.5 and 1%) was studied,assessing the impact of hydrolysis on WPC by determination degree of hydrolysis (DH),Fast proteins liquid chromatography (FPLC),Tricine SDS-PAGE,antioxidant activity at sampling time beside,and technological properties (solubility,emulsifying activity index (EAI) and foaming activity (FA)) at the best condition (maximum DH and antioxidant activity) other *** showed,in the first 30 min,DH reached 22.76% at E/S (1%) with a total degradation of α-lactalbumin (α-La) and almost of β-lactoglobulin (β-Lg).A significant increase in antioxidant activity and solubility was observed,while not for EAI,and *** results indicate for the first time that β-Lg is susceptible to hydrolyse by FCE that rarely found for other *** hydrolysates showed very relevant performance,and suggest that could be appropriate production of functional ingredients.

关键词： Whey proteins Ficin Hydrolysis Antioxidant Solubility

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Removing harvest residues from hardwood stands affects tree growth, wood density and stem wood nutrient concentration in European beech (Fagus sylvatica) and oak (Quercus spp.)

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Forest Ecosystems 2022年第2期9卷 147-159页

作者： Sanjoy Roy Jean-Michel Leban Bernhard Zeller Gregory van der Heijden Arnaud Reichard Marie-Christine Gehin Philippe Santenoise Laurent Saint-Andre INRAE BEFF-54000 NancyFrance IGN Laboratoire de l’Inventaire ForestierNancyF-54000France Universite de Lorraine AgroParisTechINRAESILVAF-54000 NancyFrance

Background:Higher exportation of harvest residues from forests due to increased demand for woody biomass,has reportedly diminished soil mineral resources and may lead to degraded tree nutrition as well as ***,as nutrients become less available in the soil,the remobilization of nutrients in biomass tissues(plant internal cycling)helps sustain tree *** study aims to quantify the impact of Removing Harvest Residues and Litter(RHRL)during five years on tree growth,wood density,and stem wood nutrient concentrations in young beech and oak forest ***:Our study found that,RHRL significantly decreased tree growth ring width by 14%,and wood density by 3%,in beech trees,in near bark *** also significantly reduced nutrient concentration in near bark and near pith areas of both studied ***,Na and S were found lower by 44%,76%,and 56%,respectively,in near bark area of beech *** near bark area of oak trees,K,Ca,Mg,Na,S,and Fe were lower by 20%,25%,41%,48%,41%,and 16%,respectively.K and Mg concentrations decreased more strongly in near pith area compared to near bark area suggesting internal translocation of these two ***:In beech trees,wood density proved to be an important factor while quantifying the effect of removing harvest residuals on tree growth and *** nutrient loss intensified the remobilization of nutrients con-tained in older tree rings(close to the pith)towards newly formed rings(close to bark).In our study,in beech trees,K was found to be the most recycled major *** results demonstrate the potential of such analysis for providing valuable insight into the effect of RHRL in premature stands on the physiological adaptive strategies of trees and an indication of soil fertility status.

关键词： Harvest residues Fagus sylvatica Quercus petraea dendroecology dendrochemistry Radial growth Wood density Tree growth Ring width Translocation

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Portulaca oleracea Leaf Aqueous Lyophilized Extract Reduces Hyperglycemia and Improves Antioxidant Status of Red Blood Cells and Liver in Streptozotocin-lnduced Diabetic Wistar Rats

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Journal of Pharmacy and Pharmacology 2017年第3期5卷 139-148页

作者： Guenzet Akila Krouf Djamil Berzou Sadia laboratoire de nutrition Clinique et Metabolique Departement de Biologie Faculte des Sciences de la Nature et de la VieUniversitd d'Oran Oran 31000 Alg~rie

The aim of this study was to investigate the antihyperglycemic and antioxidant effects of Po （Portulaca oleracea） lyophilised aqueous extract in diabetic male Wistar rats. Diabetes was induced intraperitonially by a single injection of STZ （streptozotocin）（60 mg/kg bw （body weight））. Twenty diabetic rats, weighing 263 ± 5 g, were divided into two groups fed a casein diet supplemented or not with Po extract （1 g/kg bw）, for four weeks. Control group （n = 6） received 0.23-0.25 mL of citrate buffer and was fed a standard diet during the experiment. The study was carried out at Oran University, Algeria and the entire experiments lasted from September 2011 to July 2012. Blood was obtained from the abdominal aorta of rats after fasting overnight and standard methods were used for the extraction of spices, determination of glycemia, insulinemia, lipid peroxidation and antioxidant enzymes activities. Portulaca oleracea treated compared to untreated rats, glycemia and HbAIc values were respectively 2.8- and 1.7-fold lower. TBARS （thiobarbituric acid reactive substances） concentrations were reduced in RBC （red blood cells）（-54%） and plasma （-65%）. Moreover, in liver and kidney, TBARS values were respectively 1.8- and 2-fold lower. SOD （superoxide dismutase） and GSH-Px （glutathione peroxidase） activities were increased respectively by ＋38% and ＋85%, in liver. GSSG-Red （glutathione reductase） activity was 1.9-fold higher in kidney, while CAT （catalase） was improved in kidney （＋48%）. In RBCs, SOD, GSH-Px, GSSH-Red and CAT activities were increased by 31%, 42%, 56% and ＋50%, respectively. These data have cast a new light on the actions of Portulaca oleracea and its antioxidant potential benefits in preventing diabetes and its complications.

关键词： Portulaca oleracea rats diabetes streptozotocin antioxidative enzymes TBARS.

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