整合素在瘤细胞架构形成中的作用
T Volk1, L I Fessler, J H Fessler
1Molecular Biology Institute, University of California, Los Angeles 90024-1606.
Cell
|November 2, 1990
概括
集成蛋白对肌肉发育至关重要,它与环境协调内部结构. 在Drosophila中,整合素的突变破坏了瘤细胞的形成和肌肉的整合.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 生物化学 生物化学
背景情况:
- 整合素是细胞表面受体,调解细胞-细胞外基质相互作用.
- 肌肉分化涉及复杂的细胞架构组织和组织集成.
- 整合素在协调肌肉细胞架构和组织整合中的作用需要进一步阐明.
研究的目的:
- 调查整合素在肌肉分化和肉瘤形成中的作用.
- 确定整合素对于肌肉细胞正确集成到组织中的必要性.
- 为了检查Drosophila的肌体发生过程中整合素的局部化和功能.
主要方法:
- 在拉米林基质上培养Drosophila胚胎细胞.
- 使用免疫光学分析整合素局部化.
- 野生类型和整合蛋白βPS无突变 (肌球体) 胚胎/幼虫的比较.
- 肌肉发育和瘤形成的评估.
主要成果:
- 集成蛋白αPS2βPS局部化到培养细胞中的接触区域以及体内Z波段和肌肉插入.
- 肌管形成发生了,但癌症的发展需要血清或纤维素.
- 在肌球突变体中,因特林缺乏导致肌体发生缺陷和Z带形成.
- 细胞附着,扩散和在拉米因上生长是独立于整合蛋白的.
结论:
- 在肌肉分化过程中,整合素对于协调sarcomere细胞架构与细胞环境至关重要.
- 整合素在肌肉细胞正确整合到发育中的组织中起着至关重要的作用.
- 虽然整合蛋白对瘤组织至关重要,但其他蛋白质则调解了初始肌细胞细胞和神经元与拉米宁的附着.
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