铁氨酸激酶受体与c-met蛋白无法区分
S Giordano1, C Ponzetto, M F Di Renzo
1Department of Biomedical Sciences and Oncology, University of Torino, Italy.
Nature
|May 11, 1989
概括
研究人员在胃瘤细胞中发现了一种新型的氨酸激酶受体,p190. 这种蛋白质是c-MET原基因产物,其在瘤细胞中的放大和过度表达为癌症发展提供了新的见解.
科学领域:
- 分子生物学分子生物学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 具有蛋白氨酸激酶活性的生长因子受体调节细胞增殖.
- 异常的氨酸激酶活性与癌症的发展有关.
- 以前在胃瘤细胞系 (GTL-16) 中发现了一种具有高激素激酶活性的跨膜糖蛋白 (p190).
研究的目的:
- 描述新型的氨酸激酶受体p190.0.
- 确定p190与已知的原型瘤基因之间的关系.
- 研究c-MET在胃瘤细胞系GTL-16中的作用.
主要方法:
- 免疫沉和电泳被用来分析p190.0的结构.
- 西方涂抹和南方杂交被用来比较p190与c-MET.
- 在GTL-16细胞中对c-MET基因放大和蛋白质表达的分析.
主要成果:
- 结果显示,p190与c-MET原瘤基因编码的蛋白质无法区分.
- 在其他人类细胞系中,p190的αβ子单元结构被保留.
- GTL-16细胞表现出c-MET的放大和过度表达,与高p190水平相关.
结论:
- p190代表了人类瘤细胞系中c-MET原瘤基因的功能性改变.
- 这些发现提供了人类癌症中c-MET功能改变的第一个例子.
- 这项研究强调了c-MET在胃瘤发生中的潜在作用.
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