成年稀有鮈鲫接触双酚 A 会降低精子质量,并破坏睾丸水通道蛋白。

Adult exposure to bisphenol A in rare minnow Gobiocypris rarus reduces sperm quality with disruption of testicular aquaporins.

机构信息

College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China; College of Animal Science and Technology, Yangzhou University, Yangzhou, 225009, China.

College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China.

出版信息

Chemosphere. 2018 Feb;193:365-375. doi: 10.1016/j.chemosphere.2017.11.034. Epub 2017 Nov 8.

Abstract

Bisphenol A (BPA) is an endocrine disrupter which has adverse effects on male reproduction. Aquaporins (AQPs), well known water-selective channels, play important roles in spermatogenesis and sperm functions. However, whether AQPs participate in the process that BPA induces abnormal sperms has not been investigated to date. In the present study, adult male rare minnows Gobiocypris rarus were exposed to environmentally relevant concentrations BPA (15 and 225 μg/L) for 1, 2 and 3 weeks. Results showed that BPA exposure disrupted sperm motility, increased the percentage of abnormal sperm cells, and decreased sperm tolerance to hypotonic solution and sperm fertilization capacity. Meanwhile, protein levels of AQPs were up-regulated, and their distribution in the testis was abnormal following BPA exposure. The following chromatin immune coprecipitation showed that BPA could regulate aqp3 and 8 expression through the ERE in their 5'-flanking region. The present study demonstrated that BPA could decrease the sperm quality in rare minnow, and AQP3 and 8 might play significant roles in this process.

摘要

双酚 A (BPA) 是一种内分泌干扰物,对男性生殖系统有不良影响。水通道蛋白 (AQPs) 是众所周知的水选择性通道,在精子发生和精子功能中发挥重要作用。然而,AQPs 是否参与 BPA 诱导异常精子的过程尚未得到研究。在本研究中,成年雄性稀有鮈鲫(Gobiocypris rarus)暴露于环境相关浓度的 BPA(15 和 225μg/L)1、2 和 3 周。结果表明,BPA 暴露会破坏精子的运动能力,增加异常精子细胞的百分比,并降低精子对低渗溶液的耐受性和受精能力。同时,AQPs 的蛋白水平上调,并且它们在睾丸中的分布在 BPA 暴露后异常。随后的染色质免疫共沉淀表明,BPA 可以通过其 5'侧翼区域的 ERE 调节 aqp3 和 8 的表达。本研究表明,BPA 可以降低稀有鮈鲫的精子质量,AQP3 和 8 可能在这一过程中发挥重要作用。

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