生物
女性化(社会学)
雌激素受体α
雌激素受体
雌激素
内分泌学
内科学
性反转
性别分化
遗传学
基因
医学
社会科学
癌症
社会学
乳腺癌
作者
Pan Li,Yinbiao Guo,Lin Jin,Xiao Liang,Gaoan Chen,Wei Sun,Ling Xiao,Guo-Ying Qian,Chutian Ge
标识
DOI:10.1093/biolre/ioac088
摘要
Exogenous estrogen have shown their feminization abilities during the specific sex differentiation period in several reptiles. However, the specific regulatory mechanism and downstream regulatory genes of estrogen remain elusive. In the present study, 17β-estradiol (E2), as well as drugs of specific antagonists and/or agonists of estrogen receptors, were employed to figure out the molecular pathway involved in the E2-induced feminization in Chinese soft-shelled turtles, an important aquaculture species in China. E2 treatment led to typical female characteristics in the gonads of ZZ individuals, including thickened outer cortex containing a number of germ cells and degenerated medullary cords, as well as the disappearance of male marker SOX9, and the ectopic expression of ovarian regulator FOXL2 at the embryonic developmental stage 27 and 1 month after hatching. The specific ESR1 antagonist or a combination of three estrogen receptor antagonists could block the sex reversal of ZZ individuals induced by estrogen. In addition, specific activation of ESR1 by agonist also led to the feminization of ZZ gonads, which was similar to the effect of estrogen treatment. Furthermore, transcriptome data showed that the expression level of FOXL2 was significantly upregulated, whereas mRNA levels of DMRT1, SOX9, and AMH were downregulated after estrogen treatment. Taken together, our results indicated that E2 induced the feminization of ZZ Chinese soft-shelled turtles via ESR1, and decrease of male genes DMRT1, SOX9, and AMH and increase of ovarian development regulator FOXL2 might be responsible for the initiation of E2-induced feminization.
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