人类IL-17A蛋白质的产生通过PIP5K1α-依赖的翻译检查点来控制
Shankar K Revu1, Wenjuan Yang2, Dhivyaa Rajasundaram3
1Division of Rheumatology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA.
Science signaling
|October 24, 2023
概括
研究人员发现了一种新方法来控制T助手17 (TH17) 细胞中介素-17 (IL-17) 蛋白质的产生. 这种机制涉及调节翻译,而不是转录,为自身免疫性疾病提供潜在的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 介质蛋白-17 (IL-17) 对于微生物防御至关重要,但也会导致自身免疫性疾病的炎症和组织损伤.
- 调节T助手17 (TH17) 细胞分化和IL-17的产生至关重要,先前的理解仅集中在转录控制上.
- 酸丁酸和酸丁酸4,5-双酸 (PIP2) 一样,是T细胞激活中的关键信号分子.
研究的目的:
- 调查酸氨醇,特别是PIP在T17细胞的核功能中的作用.
- 阐明了超出转录控制的调节IL-17A蛋白质生产的机制.
- 探索针对这种途径在多发性硬化症等疾病中的治疗潜力.
主要方法:
- 对人类T17,T1和T2细胞中核PIP2丰富的分析.
- 抑制PIP5K1α激酶以评估其对IL-17A产生的影响.
- 调查PIP5K1α与包括ARS2在内的mRNA结合蛋白的相互作用,以及它们对IL-17AmRNA翻译的影响.
主要成果:
- 发现PIP2在人类TH17细胞的细胞核中富含,这取决于PIP5K1α活性.
- 抑制PIP5K1α损害了IL-17A蛋白质的产生,但没有影响IL17AmRNA水平或稳定性.
- 表明PIP5K1α与ARS2相互作用,促进IL17AmRNA的结合,并促进IL-17A蛋白质合成.
结论:
- 已经确定了一种通过翻译调节IL-17A蛋白质生产的新型,转录独立的机制.
- 由PIP5K1α和ARS2介导的核PIP2丰富,对于TH17细胞中的IL-17A蛋白质合成至关重要.
- 这一途径代表了IL-17介导的自身免疫性疾病的潜在治疗标.
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