Genetic effect of an A/G polymorphism in the HSP70 gene on thermotolerance in chicken

文献类型： 外文期刊

第一作者： Chen, Z. Y.

作者： Chen, Z. Y.;Zhang, W. W.;Gan, J. K.;Kong, L. N.;Zhang, X. Q.;Zhang, D. X.;Luo, Q. B.;Chen, Z. Y.;Zhang, W. W.;Gan, J. K.;Kong, L. N.;Zhang, X. Q.;Zhang, D. X.;Luo, Q. B.

作者机构：

关键词： Chicken HSP70 gene;Thermotolerance traits;mRNA expression;Western blotting;Dual-luciferase reporter assay

期刊名称：GENETICS AND MOLECULAR RESEARCH （ 影响因子：0.764； 五年影响因子：0.912 ）

ISSN： 1676-5680

年卷期： 2016 年 15 卷 2 期

页码：

收录情况： SCI

摘要： Studying thermotolerance is important for the prevention of thermostress in chickens. This study aimed to analyze the effect of mutations in the heat shock protein 70 (HSP70) gene on chicken thermotolerance. The C.-69A> G SNP in the 5'-flanking region of the HSP70 gene was genotyped in Lingshan and White Recessive Rock (WRR) chickens. Association of this SNP with thermotolerance traits revealed it to be significantly associated with CD4+/CD8+, and potentially associated with heterophil-to-lymphocyte ratio in WRR chickens exposed to thermoneutral temperature (15 degrees C). Online prediction detected a putative myeloid zinc finger protein 1 binding factor in the C.-69A> G mutation. Under acute thermostress, mRNA levels of HSP70 in individuals with different C.-69A> G genotypes varied in the heart, leg muscle, and liver tissues. The HSP70 protein was expressed at higher levels in individuals with the GG genotype than in those with the AA genotype. In heart and liver, protein expression of HSP70 in individuals with the GG genotype was significantly higher than in those with the AA genotype. In leg muscle, protein expression was higher in birds with the GG genotype than in those with the AA and AG genotypes. Luciferase activity of the GG genotype was significantly higher than that of the AA genotype, suggesting that the C.-69A>G SNP regulates HSP70 gene expression. These results indicate that the C.-69A>G SNP in the 5'-flanking region of the HSP70 gene might affect chicken thermotolerance and that the GG genotype might be advantageous for the prevention of thermostress.

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