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- W2080294105 abstract "Both male and female freshwater catfish, Heteropneustes fossilis , were exposed to safe (SC; 0.1 and 1.0 mg/L) and sublethal (SL; 10 mg/L) concentrations of an agricultural pesticide, γ -hexachlorocyclohexane ( γ -HCH) for 4 weeks during the active pre-spawning (vitellogenic) phase of their annual reproductive cycle. On the last day of exposure, 18 h before killing, fish were treated intramuscularly (i.m.) with [I- 14 C]acetic acid (74 kBq per fish). After 4 weeks of exposure, we monitored the effects of γ -HCH on gonadosomatic index (GSI); on plasma concentrations of gonadotropin (GtH), testostosterone (T), 11-ketotestosterone (11-KT), 17 β -estradiol (E 2 ); and on hepatic incorporation of [I- 14 C]acetic acid into total phospholipids (TP) and the fractions thereof: phosphatidylcholine (PC), phosphatidylserine (PS), phosphatidylinositol (PI), and phosphatidylethanolamine (PE). In both the sexes, GSI and plasma GtH were decreased significantly in response to γ -HCH exposure. Plasma T and 11-KT in males, and plasma T and E 2 in females declined significantly in response to γ -HCH exposure. In both the sexes, hepatic incorporation of [I- 14 C]acetic acid into PS and PI increased significantly, whereas incorporation into TP, PC, and PE was significantly reduced after γ -HCH exposure. Our findings demonstrated that γ -HCH exposure depressed GSI, plasma GtH, sex steroids, and [I- 14 C]acetic acid incorporation into hepatic TP, and had very selective and specific effects on various classes of TP, resulting either from the hypothalamo-hypophyseal-gonadal axis or from direct action on hepatic and steroidogenic enzymes during the pre-spawning phase, causing reproductive endocrine disruptions." @default.
- W2080294105 created "2016-06-24" @default.
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- W2080294105 date "2004-05-01" @default.
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- W2080294105 title "Reproductive endocrine disruption in the freshwater catfish, Heteropneustes fossilis, in response to the pesticide γ-hexachlorocyclohexane" @default.
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- W2080294105 doi "https://doi.org/10.1016/j.ecoenv.2003.07.014" @default.
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