通过调节c-myc转录能力,GCIP和SIRT6协同抑制ITGAV基因表达
Yi-Ching Huang1, Tien-Ming Yuan2, Bang-Hung Liu1
1Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan.
The Journal of biological chemistry
|February 15, 2025
概括
葡萄2和CyclinD1相互作用蛋白 (GCIP) 通过与c-Myc和SIRT6.6相互作用来抑制癌细胞的入侵. 这种复合物抑制ITGAV转录,揭示了GCIP的新机制.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 基因规则 基因规则
背景情况:
- 葡萄2和CyclinD1相互作用蛋白 (GCIP) 是一种被提议的瘤抑制剂,参与调节癌细胞生长,入侵和迁移.
- 之前的研究表明,GCIP的淘汰可以增强癌细胞的迁移和入侵,但潜在的机制尚不清楚.
研究的目的:
- 阐明GCIP抑制癌细胞迁移和入侵的分子机制.
- 确定GCIP在癌细胞中的相互作用伙伴和监管目标.
主要方法:
- 基于cDNA微阵列的A549细胞的表达概况,有或没有GCIP敲击.
- 在体外共免疫沉降和体内近距离结合试验中检测蛋白质相互作用.
- 路西法酶记者测定和ChIP测定用于分析转录调节.
- 对c-Myc监管动机 (E-box) 的ITGAV促进者的序列分析.
主要成果:
- GCIP对ITGAV和ICAM-1的表达进行负调节.
- GCIP与c-Myc和SIRT6.6直接相互作用.
- GCIP通过通过c-Myc.通过它的促进器绑定到电子盒抑制ITGAV转录.
- GCIP-SIRT6复合体调节了c-Myc在E盒中的转录活动.
结论:
- GCIP作为ITGAV的转录抑制剂,涉及与c-Myc和SIRT6.6的相互作用.
- 确定了一个新的监管网络,涉及GCIP,SIRT6,c-Myc和ITGAV.
- SIRT6-GCIP复合体负面调节c-Myc的致癌功能,包括细胞增殖和迁移.
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