癌细胞间隙连接通过cGAMP转移促进大脑转移
Qing Chen1, Adrienne Boire1,2, Xin Jin1
1Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
Nature
|May 27, 2016
概括
星球细胞通过与癌细胞形成间隙结促进大脑转移,从而促进瘤生长和化学抵抗. 间隙结抑制剂为大脑转移提供了潜在的治疗策略.
科学领域:
- 神经瘤学
- 癌症生物学
- 蜂通信
背景情况:
- 大脑转移是癌症相关死亡的主要原因,
- 在大脑转移中起着至关重要的作用.
- 癌细胞利用特定的分子相互作用在大脑微环境中壮成长.
研究的目的:
- 阐明星细胞在促进大脑转移中的作用.
- 确定大脑中癌细胞与星球细胞相互作用的分子机制.
- 探索针对这些相互作用的治疗策略.
主要方法:
- 在人类和小鼠的乳腺和肺癌细胞中研究了protocadherin 7 (PCDH7) 的表达.
- 分析了涉及连接素43 (Cx43) 的癌细胞间隙结的形成.
- 研究了星球细胞中cGAMP的转移和STING通路的激活.
- 研究了天体细胞衍生细胞因子对癌细胞信号通路 (STAT1,NF-κB) 的影响.
- 在临床前模型中评估间隙连接调节剂 (美克洛芬胺,tonabersat) 的疗效.
主要成果:
- 在癌细胞上,PCDH7调解了与星球细胞的间隙结合的形成.
- 癌细胞将cGAMP转移到星球细胞,激活STING通路和细胞因子 (IFNα,TNF) 的产生.
- 星细胞衍生细胞因子促进癌细胞中的STAT1和NF- kB信号传递,增强生长和化学抵抗.
- 甲基胺和tonabersat破坏了这种沟通循环,减少了大脑转移.
结论:
- 星球细胞通过差距连接通信启动的副质信号循环积极促进大脑转移.
- 用小分子抑制剂向癌细胞间隙结合为大脑转移提供了有前途的治疗途径.
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