畜牧兽医学报 ›› 2023, Vol. 54 ›› Issue (11): 4766-4776.doi: 10.11843/j.issn.0366-6964.2023.11.030

• 基础兽医 • 上一篇    下一篇

AA肉鸡和如皋黄鸡海马和下丘脑GR和FKBP5的表达及其与应激敏感性的关系

刘杰1,2, 丛玮1,2, 赵敏蝶1,2, 赵茹茜1,2*   

  1. 1. 南京农业大学动物医学院, 南京 210095;
    2. 农业农村部动物生理生化重点实验室, 南京 210095
  • 收稿日期:2023-04-23 出版日期:2023-11-23 发布日期:2023-11-26
  • 通讯作者: 赵茹茜,主要从事动物生理调控研究,E-mail:zhaoruqian@njau.edu.cn
  • 作者简介:刘杰(1994-),女,山东青岛人,博士生,主要从事动物生理调控研究,Email:525058278@qq.com
  • 基金资助:
    国家自然科学基金 (31972638;32272962);"十四五"国家重点研发计划 (2022YFD1300401)

Expression of GR and FKBP5 in Hippocampus and Hypothalamus of Arbor Acres and Rugao Yellow Broiler Chickens and Its Relationship with Stress Sensitivity

LIU Jie1,2, CONG Wei1,2, ZHAO Mindie1,2, ZHAO Ruqian1,2*   

  1. 1. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China;
    2. Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture and Rural Affairs, Nanjing 210095, China
  • Received:2023-04-23 Online:2023-11-23 Published:2023-11-26

摘要: 旨在探究肉鸡海马和下丘脑糖皮质激素受体(glucocorticoid receptor,GR)及其负反馈因子FK-506结合蛋白5(FK-506 binding protein,FKBP5)的表达是否与应激敏感性有关。选用35日龄的AA肉鸡和如皋黄鸡,连续10 d皮下注射皮质酮(corticosterone,CORT),建立慢性应激模型。对应激后AA肉鸡和如皋黄鸡的体重、采食量、行为、血浆生化指标等进行检测,比较应激敏感性的差异。通过qPCR和Western blot检测海马和下丘脑GR和FKBP5的表达,并与血浆CORT水平进行相关分析。结果表明:1)AA肉鸡在CORT处理后体重显著降低,紧张性不动持续时间和血浆CORT水平均显著增加,但如皋黄鸡变化均不显著;AA肉鸡和如皋黄鸡血液异嗜性粒细胞/淋巴细胞比率在CORT处理后均显著上调,但AA肉鸡显著高于如皋黄鸡。2)基础状态下,如皋黄鸡海马和下丘脑GR蛋白表达量显著高于AA肉鸡;CORT处理导致AA肉鸡和如皋黄鸡海马和下丘脑GR蛋白表达显著下调,但应激后如皋黄鸡GR蛋白表达量仍显著高于AA肉鸡。3)CORT诱导AA肉鸡海马和下丘脑FKBP5 mRNA 和蛋白表达均显著上调,而如皋黄鸡海马和下丘脑FKBP5的上调只发生在蛋白水平,mRNA的表达量没有变化;应激后AA肉鸡FKBP5的蛋白表达量显著高于如皋黄鸡。4)血浆CORT水平与海马和下丘脑中GR蛋白表达量呈负相关,与FKBP5蛋白表达量呈正相关;海马和下丘脑中GR与FKBP5的蛋白表达量呈负相关。以上结果表明,AA肉鸡和如皋黄鸡应激敏感性的差异与海马和下丘脑GR和FKBP5的表达及其调控有关。

关键词: 肉鸡, 应激, 海马, 下丘脑, 糖皮质激素受体, FK-506结合蛋白5

Abstract: This study was conducted to investigate whether the expression of glucocorticoid receptor (GR) and FK-506 binding protein 5 (FKBP5) in hippocampus and hypothalamus of broiler chickens is related to stress sensitivity. Arbor Acres (AA) and Rugao yellow (Rugao) broiler chickens at 35 days of age were injected subcutaneously with corticosterone (CORT) for 10 consecutive days to establish a chronic stress model. The body weight, feed intake, behavior and plasma biochemical indexes of the two lines of chickens were detected, and the differences in stress sensitivity were compared. The expression of GR and FKBP5 in hippocampus and hypothalamus were detected by qPCR and Western blot, and their correlation with plasma CORT levels was analyzed. The results showed as follows: 1) After CORT treatment, the body weight of AA decreased significantly, the tonic immobility (TI) duration and plasma CORT level increased significantly, but there was no significant change in Rugao. CORT treatment resulted in increased heterophil/lymphocyte (H/L) ratio in blood of both AA and Rugao, yet H/L ratio was significantly higher in AA than in Rugao. 2) The basal level of GR protein expression in hippocampus and hypothalamus was significantly higher in Rugao than that in AA; The protein expression of GR was significantly down-regulated after CORT treatment, but Rugao still showed significantly higher GR protein than AA after stress. 3) CORT significantly up-regulated FKBP5 expression at both mRNA and protein levels in hippocampus and hypothalamus of AA, while the FKBP5 up-regulation in hippocampus and hypothalamus of Rugao only occurred at the protein level. FKBP5 protein expression was significantly in AA than in Rugao after stress. 4) Plasma CORT level was negatively correlated with GR protein expression in hippocampus and hypothalamus, and positively correlated with FKBP5 protein expression. GR was negatively correlated with FKBP5 protein expression in hippocampus and hypothalamus. These results indicate that AA and Rugao have different stress sensitivity, and the expression levels of GR and FKBP5 in hippocampus and hypothalamus are related to stress sensitivity.

Key words: broiler chicken, stress, hippocampus, hypothalamus, glucocorticoid receptor, FK-506 binding protein 5

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