蛋白质激酶RIPK3的活性决定了细胞是否死于亡或亡
Kim Newton1, Debra L Dugger, Katherine E Wickliffe
1Department of Physiological Chemistry, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.
概括
受体相互作用蛋白激酶3 (RIPK3) 激酶活性对于亡至关重要. 不活跃的RIPK3意外触发了亡,而不活跃的RIPK1则阻止了亡,但允许其他细胞信号通路发挥作用.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞死亡途径 细胞死亡途径
背景情况:
- 受体相互作用蛋白激酶1 (RIPK1) 和RIPK3介导死亡,一种促炎性编程细胞死亡.
- 之前使用RIPK3缺乏的小鼠或RIPK1抑制剂的研究表明,亡有助于疾病病理.
研究的目的:
- 在体内调查活跃RIPK1和RIPK3激酶功能的必要性.
- 阐明 RIPK1 和 RIPK3 激酶活性在细胞死亡和信号传递中的不同作用.
主要方法:
- 工程小鼠表达催化不活的RIPK3 (D161N) 和RIPK1 (D138N).
- 评估小鼠的生存能力,对TNF诱导的低温的反应,以及细胞死亡途径 (细胞亡和亡).
主要成果:
- 表达非活性RIPK3 (D161N) 的小鼠表现出依赖RIPK1和酶-8的致命性亡.
- 表达非活性RIPK1 (D138N) 的小鼠是可活的,并且对TNF诱导的低温和亡有抵抗力.
- 具有非活性RIPK1 (D138N) 的细胞仍然能够进行TNF诱导的基因转录.
结论:
- RIPK3激酶活性对于死细胞的死亡是不可或缺的.
- RIPK3激酶活性还调节了死和卡斯帕-8依赖性亡之间的切换.
- RIPK1激酶活性对生命力不至关重要,但对于TNF诱导的亡是必要的.
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