Response of Sex Steroid Hormone Synthesis Substrates in Serum and Testes of Male Tilapia (Oreochromis niloticus) Exposed to Methomyl and Its Recovery Pattern
文献类型： 外文期刊
作者： Meng, Shunlong 1 ; Chen, Xi 1 ; Song, Chao 1 ; Fan, Limin 1 ; Qiu, Liping 1 ; Hu, Gengdong 1 ; Chen, Jiazhang 1 ; Xu, Pao 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Sci Observing & Expt Stn Fishery Resources & Envi, Wuxi 214081, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Wuxi Fishery Coll, Wuxi 214081, Jiangsu, Peoples R China
关键词： pesticide; freshwater fish; cholesterol; pregnenolone; progesterone; depuration period
期刊名称：APPLIED SCIENCES-BASEL （ 影响因子：2.679； 五年影响因子：2.736 ）
ISSN：
年卷期： 2021 年 11 卷 22 期
页码：
收录情况： SCI
摘要： The response of synthetic substrates of sex steroid hormones-cholesterol (CHO), pregnenolone (PREG), and progesterone (PROG)-in the serum and testes of male tilapia (Oreochromis niloticus) to the environmental estrogen pesticide methomyl (0.2, 2, 20, and 200 mu g & BULL;L-1) was evaluated using static-water contact toxicity tests. The results showed that low methomyl concentrations (0.2 and 2 mu g & BULL;L-1) had no significant effects on the contents of CHO, PREG, and PROG in the serum and testes of male tilapia (p > 0.05). Consequently, the concentration of 2 mu g & BULL;L-1 could be used as a preliminary reference threshold for the non-effective dose of methomyl in male tilapia. Exposure to high methomyl concentrations (20 and 200 mu g & BULL;L-1) significantly inhibited the levels of CHO, PREG, and PROG in the serum and testes of male tilapia (p < 0.05) and showed a dose-response relationship. Sex steroid hormone synthesis substrate damage to male tilapia caused by less than 20 mu g & BULL;L-1 methomyl was reversible, while the damage caused by equal to or greater than 200 mu g & BULL;L-1 methomyl was irreversible when tilapia were transferred to methomyl-free water for 18 days. Thus, a concentration of 200 mu g & BULL;L-1 could be used as a reference threshold for irreversible damage caused by methomyl in male tilapia.
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