人类的刺是一个质子通道
Bingxu Liu1,2,3, Rebecca J Carlson1,4, Ivan S Pires3
1Broad Institute, Cambridge, MA, USA.
概括
干扰素基因刺激剂 (STING) 作为质子通道,调节细胞过程. 这种通道活性对于炎症酶激活和LC3B脂化至关重要,但不能诱导干扰素,提供治疗点.
科学领域:
- 免疫学
- 细胞生物学
- 分子生物学
背景情况:
- 细胞器中的质子泄漏表明非正规的轻链3B (LC3B) 脂化和炎症酶激活.
- 这些过程通常是在干扰素基因刺激器 (STING) 激活时引起的.
研究的目的:
- 为了研究人类的STING作为质子通道的假设.
- 确定STING潜在通道活动在下游细胞事件中的作用,如LC3B脂化和炎症酶激活.
主要方法:
- 结构分析以确定STING的假设通道接口.
- 在激活STING时测量Golgi的pH值变化.
- 在脂质体中重建STING以评估质子传输.
- 使用一种STING激动剂的化合物53 (C53),以抑制STING活动和质子流.
- 评估C53对STING诱导的LC3B脂化和炎症酶激活的影响.
主要成果:
- 导致高尔基的pH值增加,
- 复制的STING在脂质体中表现出了超膜质子运输能力.
- 在细胞模型和脂质体中,化合物53 (C53) 有效地阻断了STING诱导的质子流.
- C53还抑制了STING诱导的LC3B脂化和炎症酶激活,强调了STING对这些通路的通道功能的必要性.
结论:
- 人类的刺作为一个质子通道.
- STING的质子通道活性对于诱导LC3B脂化和炎症酶激活至关重要.
- 可以将STING的干扰素诱导功能与其在LC3B脂化和炎症酶激活中的作用分开,这表明它有不同的功能机制.
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