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取决于温度的性别确定由pSTAT3抑制Kdm6b的介导
Ceri Weber1, Yingjie Zhou2, Jong Gwan Lee1
1Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.
在海中,温度依赖性性别确定受Kdm6b.b.规范. 更高的温度激活STAT3,抑制Kdm6b,阻断男性发育,促进女性发育.
科学领域:
- 发展生物学 发展生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 爬行动物内分泌学 爬行动物内分泌学
背景情况:
- 温度依赖性性别决定 (TSD) 是爬行动物的生殖策略的一个关键因素.
- 表观遗传调节器Kdm6b对于激活TSD物种中男性发育途径至关重要.
- 之前的研究表明,Kdm6b在产生男性的温度下表达的增加.
研究的目的:
- 为了确定化温度和Kdm6b转录调节之间的直接因果关系.
- 阐明温度影响性别决定途径的分子机制.
- 确定参与温度感应和基因调节的关键信号分子.
主要方法:
- 研究了信号转换器和转录3激活器 (STAT3) 在Kdm6b调控中的作用.
- 利用分子技术来评估Kdm6b位点的STAT3酸化和DNA结合.
- 在不同的温度条件下,量化离子 (Ca2+) 流入.
主要成果:
- 在更温暖的温度下观察到STAT3酸化,产生雌性.
- 发现化STAT3结合Kdm6b基因位点,抑制其转录.
- 在雌性生产温度下,Ca2+的增加流入会调解STAT3的激活,从而阻断雄性通路.
结论:
- 通过STAT3.3,一个直接的分子机制将环境温度与Kdm6b调节联系起来.
- 通过抑制Kdm6b,STAT3作为男性通路的温度敏感抑制剂.
- 信号传递在胚胎发生过程中,在调解温度诱导的STAT3激活方面发挥着至关重要的作用.
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