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首页> 外文期刊>Zoological Science >Effects of estradiol-17 beta on germ cell proliferation and DMY expression during early sexual differentiation of the medaka Oryzias latipes.
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Effects of estradiol-17 beta on germ cell proliferation and DMY expression during early sexual differentiation of the medaka Oryzias latipes.

机译:雌性马齿tip早期性分化过程中雌二醇-17β对生殖细胞增殖和DMY表达的影响。

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摘要

Sex reversal of XY male to functional females was induced by estrogen treatment during the embryonic period in the medaka Oryzias latipes. The present study aimed to examine whether exogenous estrogen (estradiol-17 beta ; E2) affects early sex differentiation, paying particular attention to DMY expression and proliferation activity of germ cells in estrogen treated XY individuals. Our results showed that germ cell number was not affected by E2 treatment at hatching, and that DMY expression was not suppressed under conditions of sex reversal. Therefore, male differentiation of germ cells, which is triggered by the expression of DMY in the supporting cell lineage, proceeds even in E2 treated XY individuals until hatching, and early sex differentiation is not altered by estrogen. However, sex reversal occurred after hatching probably because of estrogen remaining in the yolk. Interestingly, DMY expression was also detected in the large follicle layer of E2 treated XY ovary. These results suggested that DMY regulates male determination in early embryonic stage but does not suppress female follicle development..
机译:在Medaka Oryzias latipes的胚胎期,通过雌激素处理诱导了XY雄性向功能雌性的逆转。本研究旨在检查外源性雌激素(雌二醇-17 beta; E2)是否影响早期性别分化,特别注意经雌激素处理的XY个体中DMY的表达和生殖细胞的增殖活性。我们的结果表明,在孵化过程中,E2处理不会影响生殖细胞的数量,并且在性逆转的条件下,DMY的表达也不会受到抑制。因此,由DMY在支持细胞谱系中表达触发的生殖细胞的雄性分化甚至在经过E2处理的XY个体中也一直持续到孵化为止,并且雌激素不会改变早期的性别分化。但是,孵化后发生了性逆转,可能是由于卵黄中残留了雌激素。有趣的是,在经E2处理的XY卵巢的大卵泡层中也检测到DMY表达。这些结果表明DMY调节胚胎早期的雄性测定,但不抑制雌性卵泡的发育。

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