集成的奥米克和机器学习揭示了环境毒素6PPD-Q诱导的非阻塞性亚子精的分子基础
Xiya Jiang1, Hedong Lu1, Ge Ou1
1Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230001,China; NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract (Anhui Medical University), No. 81 Meishan Road, Hefei, Anhui 230032, China; Anhui Provincial Engineering Research Center of Biopreservation and Artificial Organs, Ministry of Education, No. 81 Meishan Road, Hefei, Anhui 230032, China.
一种轮胎污染物N-(1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine-quinone (6PPD-Q) 与男性不孕症有关. 这项研究确定了6PPD-Q作为单细胞塞尔托利综合征 (SCOS) 的潜在原因,它通过向像雄激素受体 (AR) 和caspase-8 (CASP8) 等关键基因.
科学领域:
- 环境毒理学环境毒理学
- 生殖生物学 生殖生物学
- 计算毒理学计算毒理学
背景情况:
- N-(1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine-quinone (6PPD-Q) 是来自轮胎的新兴环境污染物,可疑具有生殖毒性.
- 虽然6PPD-Q与男性不孕症有关,但其在非阻塞性精子缺血症 (NOA) 中仅在塞尔托利细胞综合征 (SCOS) 中的特定作用尚不清楚.
研究的目的:
- 在SCOS的背景下调查6PPD-Q的潜在毒理目标.
- 阐明6PPD-Q诱导的丸功能障碍背后的分子机制.
主要方法:
- 整合公共数据库和与SCOS相关的差异表达基因 (DEGs) 来识别候选毒性基因.
- 利用机器学习进行枢纽基因识别和分子对接/动力学模拟,以评估6PPD-Q结合相互作用.
- 进行了体内小鼠暴露和体内TM4细胞测试以验证计算预测.
主要成果:
- 鉴定了6PPD-Q目标和SCOS DEG之间的316个重叠基因,突出了雌激素信号传递,生殖细胞亡和染色体分离中的作用.
- 机器学习确定了五个枢纽基因,其中雄激素受体 (AR) 和酶-8 (CASP8) 始终被认为是6PPD-Q诱导的SCOS的核心标.
- 分子对接和模拟表明6PPD-Q对AR和MCM4具有强烈的结合亲和力;体内和体内测试证实了6PPD-Q诱导的丸损伤和细胞活力降低.
结论:
- 这项研究提出了6PPD-Q诱导的丸功能障碍和SCOS的机制性假设.
- 确定了AR和CASP8作为6PPD-Q毒性的关键分子标.
- 提供了未来环境生殖毒理学实验验证的候选目标.
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