底层膜通过分泌调节蛋白酶的空间部署而形成模式
1Department of Molecular and Cell Biology, University of California-Berkeley, Berkeley, CA 94720.
概括
虫卵腔的延长依赖于精确的原IV (Col4) 分布,由后转录作用的金属蛋白酶调节. 这项研究揭示了ADAMTS-A和Stall如何控制Col4沉积和周转,塑造器官形态.
科学领域:
- 发展生物学 发展生物学
- 细胞外矩阵 (ECM) 生物学
- 形态发生 形态发生 形态发生
背景情况:
- 细胞在发育过程中的命运模式已被理解,但形态发生模式,特别是受ECM影响的器官形状,仍然不清楚.
- 德罗斯菲拉卵室的形态发生和延长取决于前后底层膜 (BM) 组件梯度,如原IV (Col4).
研究的目的:
- 为了研究调节Drosophila卵室中的原IV (Col4) 梯度的转录后机制.
- 阐明金属蛋白酶ADAMTS-A和Stall在控制Col4沉积和循环中的作用,以确定器官形状.
主要方法:
- 在Drosophila卵室中分析了原IV (Col4) 的分布及其由金属蛋白酶的调节.
- 操纵金属蛋白酶水平 (ADAMTS-A和Stall) 来观察对Col4沉积,周转和卵室延长的影响.
- 在分泌途径内对ADAMTS-A活动的调查与细胞外.
主要成果:
- 原IV (Col4) 梯度是由转录后机制调节的,而不是Col4转录.
- ADAMTS-A,表达与Col4相反,限制了毛囊中心的Col4沉积,影响了延长.
- 在分泌途径内,ADAMTS-A在细胞内作用,以控制Col4在底层膜 (BM) 中的结合.
- 停滞促进了卵室后部的Col4循环.
结论:
- 器官形状是由ECM蛋白酶的模式表达控制的,具有双重细胞内和细胞外活动.
- ADAMTS-A和Stall协调以确定底层膜 (BM) 属性,这些属性决定了Drosophila卵室的延长.
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