Effects and mechanisms of waterborne copper exposure influencing ovary development and related hormones secretion in yellow catfish Pelteobagrus fulvidraco.

作者: Li-Han Zhang , Zhi Luo , Yu-Feng Song , Xi Shi , Ya-Xiong Pan

DOI: 10.1016/J.AQUATOX.2016.07.014

关键词: Sexual differentiationSteroidogenic acute regulatory proteinAromataseHormoneCholesterol side-chain cleavage enzymeCatfishBiologyOvarySteroidogenic factor 1EndocrinologyInternal medicine

摘要: The present study was conducted to determine the effects and mechanism of waterborne copper (Cu) exposure influencing ovary development related hormones secretion in yellow catfish Pelteobagrus fulvidraco. To this end, two experiments were conducted. In Exp. 1, partial cDNA sequences three steroidogenesis-related genes (androgen receptor (ar), steroidogenic factor 1 (sf-1) acute regulatory protein (star)) firstly characterized from P. predicted amino acid for fulvidraco ar, sf-1 star contained main structural features characteristic other species. 2, exposed Cu concentrations (control, 30μg/l 60μg/l, respectively) 56days. Sampling occurred on day 28 56, respectively. On 28, levels serum sex-steroid (FSH LH) mRNA (3β-hsd, cyp11a1, cyp17, cyp19a, star) significantly increased 30μg Cu/l. immunohistochemical analysis showed positive reaction ER, VTG aromatase low dose group. These indicated that relative short-term exposure, beneficial. contrast, 60μg Cu/l reduced FSH, LH, E2 P, ovarian 20β-hsd, cyp19a erα concentration gonadotropins sex hormones, down-regulated genes, indicating long-term had toxic effect hormone For first time, our cloned fulvidraco, demonstrated synthesis dose- time-dependent manner which will help understand Cu-induced reproductive toxicity at both transcriptional fish.

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