Gli3和Plzf在四肢发育早期的近端四肢模式中进行合作
Maria Barna1, Pier Paolo Pandolfi, Lee Niswander
1Weill Graduate School of Medical Sciences, Cornell University, New York, New York 10021, USA.
Nature
|July 15, 2005
概括
Gli3和Plzf之间的遗传相互作用对于后肢骨早期发育至关重要. 这种伙伴关系确保了适当的近端软骨形成,与远端四肢模式不同.
科学领域:
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
- 骨生物学 骨生物学
背景情况:
- 脊椎动物的四肢发育涉及中细胞聚合在近端到远端的序列.
- 对近端-远端四肢轴的模式机制不太了解.
- 早期的四肢发育通过软骨凝结建立了骨部件.
研究的目的:
- 调查控制早期四肢骨发育的遗传相互作用.
- 为了确定参与近端软骨凝结的关键基因.
- 阐明 Gli3 和 Plzf 在四肢模式中的作用.
主要方法:
- 在Gli3(-/-);Plzf(-/-) 小鼠胚胎中的遗传分析.
- 对软骨凝结模式的观察.
- 评估冠状细胞前代的分布.
- 对介质细胞存活率和基因表达的分析 (Bmpr1b).
主要成果:
- Gli3和Plzf在靠近后肢的软骨凝结 (大腿骨,骨,骨) 中进行合作.
- 远端四肢骨元素 (脚) 在Gli3(-/-);Plzf(-/-) 胚胎中影响较小.
- Gli3/Plzf 活性调节了祖先分布,而不依赖于已知的模式标记物和四肢大小.
- 肢体缺陷与表达Bmpr1b的近端介质细胞的短暂死亡相关.
结论:
- 合作的Gli3和Plzf活动对于近端四肢骨发育至关重要.
- 靠近和远距离的骨元素的发育在四肢形成的早期被明确调节.
- 这种遗传相互作用为肢体模式的基本机制提供了洞察力.
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