在Xenopus和小鼠胚胎前肢发育中的家庭主体蛋白质的梯度
G Oliver1, C V Wright, J Hardwicke
1Department of Biological Chemistry, University of California, Los Angeles 90024-1737.
Cell
|December 23, 1988
概括
在Xenopus的四肢中,Homeobox基因XIHbox 1的表达显示了前肢的前后梯度和后肢的缺失. 这表明早期的分子差异和四足动物四肢发育中的作用.
科学领域:
- 发育生物学是发展生物学.
- 分子遗传学分子遗传学
- 进化发育生物学 进化发育生物学
背景情况:
- 家庭盒基因是胚胎发育的关键调节者.
- XIHbox 1 是一种参与发育过程的家庭主体蛋白质.
- 了解肢体发育需要识别关键的分子参与者及其表达模式.
研究的目的:
- 分析Homeobox基因XIHbox1在发育中的Xenopus肢体中的表达模式.
- 为了研究前肢和后肢发育之间的潜在分子差异.
- 探索XIHbox 1在四足肢发育中的作用.
主要方法:
- 使用特定抗体检测XIHbox 1蛋白表达.
- 在Xenopus前肢和后肢中检查的表达式.
- 在肢体芽形成之前的幼早期阶段分析表达.
- 结果与正在发育的小鼠四肢进行了比较.
主要成果:
- XIHbox 1在前肢芽中皮表现出一个前后梯度,最强的是前部和近部.
- 后肢芽中体缺乏XIHbox 1的表达,这表明早期的肢体身份差异.
- 前肢和后肢的内层外皮层表达XIHbox 1.
- 侧板介质体中的XIHbox 1表达与前肢发育场相关,但不与后肢发育场相关.
- 在正在发育的小鼠四肢中观察到类似的表达模式.
结论:
- XIHbox 1 在各种四足动物前肢发育中起作用.
- 表达模式表明,XIHbox 1参与确定前肢和后肢之间的早期分子差异.
- 研究结果支持 homeobox 基因,形态遗传学场和发育梯度之间的分子联系.
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