Germ cell sex prior to meiosis in the rainbow trout

文献类型: 外文期刊

第一作者: Li, Mingyou

作者: Li, Mingyou;Shen, Qian;Wong, Foong Mei;Xu, Hongyan;Hong, Ni;Hong, Yunhan;Zeng, Lingbing;Liu, Lin;Wei, Qiwei;Hong, Yunhan

作者机构:

关键词: boule;dazl;germ cell sex;gonia;meiosis;trout

期刊名称:PROTEIN & CELL ( 影响因子:14.87; 五年影响因子:11.279 )

ISSN: 1674-800X

年卷期: 2011 年 2 卷 1 期

页码:

收录情况: SCI

摘要: Germ cells make two major decisions when they move from an indeterminate state to their final stage of gamete production. One decision is sexual commitment for sperm or egg production, and the other is to maintain mitotic division or entry into meiosis. It is unclear whether the two decisions are made as a single event or separate events, because there has been no evidence for the presence of germ cell sex prior to meiosis. Here we report direct evidence in the fish rainbow trout that gonia have distinct sexuality. We show that dazl expression occurs in both male and female gonia but exhibits differential intracellular distribution. More strikingly, we show that boule is highly expressed in male gonia but absent in female gonia. Therefore, mitotic gonia possess sex, sperm/egg decision and mitosis/meiosis decision are two independent events, and sperm/egg decision precedes mitosis/meiosis decision in rainbow trout, making this organism a unique vertebrate model for mechanistic understanding of germ cell sex differentiation and relationship between the two decisions.

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