Journal Title
Title of Journal: Biometals
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Publisher
Springer Netherlands
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Authors: Ziwei Zhang Jiuli Zhang Yuhong Zhang Qiaohong Wang Shu Li Xiaolong Wang Shiwen Xu
Publish Date: 2013/02/26
Volume: 26, Issue: 2, Pages: 355-365
Abstract
Selenium is an essential element with antioxidant roles in immune regulation but there is little understanding of how Se acts in apoptosis in the immune organs of birds The aim of study was to evaluate the influence of Se deficiency on oxygen free radicals NO and apoptosis in immune organ of chickens 160 1dayold chickens were randomly assigned to two groups of 80 each and were fed on a lowSe diet 0032 mg/kg Se or a control diet 0282 mg/kg Se respectively OFR production in blood was determined on days 30 45 60 and 75 respectively The iNOS–NO system activity in immune organ thymus spleen bursa of fabricius was identified by NO content and NOS activity assay on days 30 45 60 and 75 respectively Apoptosis was measured by DNA ladder analysis ultrastructural observations TdTmediated dUTP nick end labeling TUNEL assay and flow cytometric analysis of apoptotic DNA The transcription of factorassociated suicide caspase3 mRNA was tested by fluorescence quantitative PCR The results showed that OFR production NO and inducible NO synthases iNOS activity in the lowSe group were significantly increased p 005 than in the control group In addition apoptosis was observed in chicken immune organ in the lowSe group The degree and the number of apoptotic cells rose in a timedependent manner The expression of Fas and caspase3 mRNA increased p 005 than in the control group It indicated that the oxidative stress and NO played a causative role in the apoptosis of immune tissues induced by selenium deficiencyThis study was supported by the National Natural Science Foundation of China 30871902 the Science Foundation of the Education Department of Heilongjiang Province 11551030 The authors thank the members of the veterinary internal medicine laboratory in college of veterinary medicine northeast agricultural university for help in feeding the chicks and analyzing the data
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