畜牧兽医学报 ›› 2018, Vol. 49 ›› Issue (5): 1037-1046.doi: 10.11843/j.issn.0366-6964.2018.05.019

• 临床兽医 • 上一篇    下一篇

槲皮素通过影响Nrf2-Keap1信号通路减缓镉中毒大鼠的生殖机能损伤

何刘1, 李慧1, 周厚继2, 佟翠1, 王佳美1, 李美琦1, 杨淑华1*, 何剑斌1*   

  1. 1. 沈阳农业大学畜牧兽医学院, 沈阳 110866;
    2. 四川省凉山州盐源县职业技术中学校, 凉山 615700
  • 收稿日期:2017-08-16 出版日期:2018-05-23 发布日期:2018-05-23
  • 通讯作者: 杨淑华(1973-),博士,硕士生导师,主要从事畜禽营养代谢病与中毒病的研究,E-mail:yangshuhua0001@syau.edu.com;何剑斌(1969-),教授,硕士生导师,主要从事临床兽医学研究,E-mail:hejianbin69@163.com
  • 作者简介:何刘(1992-),女,辽宁海城人,硕士,主要从事家畜产科疾病的诊断和治疗的研究,E-mail:513122096@qq.com;李慧(1991-),女,辽宁辽阳人,硕士,主要从事家畜产科疾病的诊断和治疗的研究,E-mail:370750010@qq.com
  • 基金资助:

    沈阳农业大学博士后基金(2014.6)

Protective Effects of Quercetin on the Reproductive Injury Induced by Cadmium through the Nrf2-Keap1 Signaling Pathway in Rats

HE Liu1, LI Hui1, ZHOU Hou-ji2, TONG Cui1, WANG Jia-mei1, LI Mei-qi1, YANG Shu-hua1*, HE Jian-bin1*   

  1. 1. College of Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China;
    2. Yanyuan Vocational and Technical School of Liangshanzhou in Sichuan Province, Liangshan 615700, China
  • Received:2017-08-16 Online:2018-05-23 Published:2018-05-23

摘要:

本试验旨在探索联合使用槲皮素(QE)可以减轻镉(Cd)致雄性大鼠生殖系统损伤及在此过程Nrf2-Keap1信号通路发挥的作用。试验选取32只3月龄、体重相近的SPF级Wistar雄性大鼠,随机分为4组,每组8只,分别为对照组[0.5 mL·(kg·d)-1生理盐水]、Cd组[5 mg·(kg·d)-1 CdCl2]、QE组[15 mg·(kg·d)-1QE]、Cd+QE组[5 mg·(kg·d)-1 CdCl2+15 mg·(kg·d)-1 QE],连续灌胃1个月。试验结束后,计算各组大鼠睾丸及附睾脏器系数,检测精子质量及睾丸组织抗氧化水平等变化,利用RT-qPCR及Western blot法检测Nrf2及其相关基因mRNA和蛋白的表达。结果表明:与对照组相比,Cd组大鼠生殖机能受损严重。与Cd组相比,Cd+QE组大鼠睾丸附睾脏器系数(P<0.01)和睾酮分泌量(P<0.05)增加明显;精子质量提高;睾丸组织中MDA、H2O2含量极显著降低(P<0.01),GSH含量(P<0.05)和CAT、T-SOD、GSH-Px酶活性(P<0.01)明显提高;Nrf2及其相关基因NQO1、γ-GCS、HO-1、GSH-Px的mRNA和蛋白的表达呈现明显上升趋势(P<0.01或P<0.05),而Keap1基因和蛋白质的表达显著降低(P<0.05)。综上,QE可能通过激活Nrf2-Keap1信号通路有效减轻Cd引起的大鼠生殖系统损伤。

Abstract:

The aim of this study was to investigate the effect of Quercetin (QE) on the reproductive system damage induced by cadmium (Cd) in male rats and the role of Nrf2-Keap1 signaling pathway in this process. A total 32 3-month-old SPF Wistar male rats were randomly divided into four groups with eight rats in each group:control group[0.5 mL·(kg·d)-1 physiological saline], Cd group[5 mg·(kg·d)-1 CdCl2], QE group[15 mg·(kg·d)-1 QE], Cd+ QE group[5 mg·(kg·d)-1 CdCl2+15 mg·(kg·d)-1 QE], the study lasted for 30 days. At the end of the trial, the testis and epididymis organs coefficients were calculated, then the sperm quality and the levels of anti-oxidation of testis were measured. RT-qPCR and Western blot were used to detect the changes of mRNA and protein expressions of Nrf2 and its related genes, respectively. The results showed that the reproductive function of rats in Cd group was seriously damaged compared with the control group. Compared with Cd group, the coefficients of testis and epididymis (P<0.01) and the secretion testosterone of rats in Cd+QE group were significantly increased (P<0.05). The semen quality was improved, furthermore, the levels of MDA, H2O2 were significantly decreased (P<0.01) and the levels of GSH (P<0.05), CAT, T-SOD, GSH-Px (P<0.01) were significantly increased in Cd+QE group. The analysis showed that the mRNA and protein expression levels of Nrf2, HO-1, NQO1, GSH-Px, γ-GCS in testis were significantly increased (P<0.05 or P <0.01) and Keap1 mRNA and protein expression levels were significantly decreased (P <0.05) in Cd+QE group. In conclusion, QE can effectively alleviate the reproductive system damage of male rats induced by Cd through activating Nrf2-Keap1 signaling pathway.

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