纤维细胞生长因子诱导额外的四肢发育从胚胎的侧翼
M J Cohn1, J C Izpisúa-Belmonte, H Abud
1Department of Anatomy and Developmental Biology, University College and Middlesex School of Medicine, London, England.
Cell
|March 10, 1995
概括
纤维细胞生长因子 (FGFs) 可以触发胚胎的额外四肢的发展. 这项研究表明,FGFs通过激活关键的发育基因和结构来启动四肢形成.
科学领域:
- 发展生物学 发展生物学
- 胚胎学 胚胎学
- 分子生物学分子生物学
背景情况:
- 纤维细胞生长因子 (FGFs) 是胚胎肢体发育中的关键信号分子.
- FGFs调节肢体介质细胞的增殖,这对肢体形成至关重要.
研究的目的:
- 调查FGFs在胚胎中启动子宫外肢发育中的作用.
- 确定FGFs诱导肢体形成的分子机制.
主要方法:
- 将FGF-1,FGF-2和FGF-4浸泡的珠子应用于小胚胎的侧翼.
- 对基因表达模式的分析,包括Sonic hedgehog和Hoxd-13.
- 诱导子宫外肢的形态发展的观察.
主要成果:
- 对胚胎侧翼的FGF应用诱导了完整的宫外四肢芽的形成.
- 诱导的四肢芽形成了像角外皮脊和极化区域这样的结构.
- FGF信号激活了Sonic hedgehog和Hoxd-13的表达,这些表达对肢体模式至关重要.
- 额外的四肢呈现逆极性,这表明侧翼细胞分布影响了模式.
结论:
- 当地的FGF生产可以启动四肢发育.
- FGF在建立肢体形成所需的信号中心方面发挥着关键作用.
- 该研究提供了对肢体模式和再生的分子基础的见解.
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