在T细胞中,PTPN22通过14-3-3τ激活PI3K通路
Bin Bai1, Tao Wang1, Xiaonan Zhang1
1Key Laboratory of Bioresource Research and Development of Liaoning Province, College of Life and Health Sciences, Northeastern University, Shenyang, China.
The FEBS journal
|May 31, 2023
概括
蛋白氨酸酸酶PTPN22通过调节14-3-3τ和PI3K信号来调节T细胞激活. 这种机制抑制了促炎因素,为自身免疫性疾病预防提供了洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 蛋白氨酸酸酶PTPN22负面调节T细胞激活,防止自身免疫性疾病.
- 14-3-3τ是一种适应蛋白,通过细胞内定位控制标蛋白的功能.
研究的目的:
- 为了阐明PTPN22和14-3-3τ之间的相互作用.
- 了解这种相互作用如何影响T细胞信号通路.
- 探索PTPN22在调节免疫反应和自身免疫性疾病中的作用.
主要方法:
- 使用PTPN22-Ser640酸化研究PTPN22与14-3-3τ的结合.
- 评估了PTPN22-14-3-3τ相互作用对14-3-3τ脱化及其与Shc.相关性的影响.
- 分析了氨基酸3-激酶 (PI3K) 和其下游信号通路的激活.
主要成果:
- 在PTPN22-Ser640处,PTPN22与14-3-3τ结合,导致14-3-3τ-Tyr179脱化.
- 这种相互作用减少了14-3-3τ-Shc的关联,促进了14-3-3ζ-Shc的结合和PI3K的激活.
- PTPN22还降低了p110氨酸酸化,进一步激活PI3K并抑制促炎因素.
结论:
- PTPN22通过PI3K/Akt/mTOR通路调节T细胞激活和免疫反应.
- 这项研究为PTPN22在T细胞信号传递中的功能提供了一个新的机制.
- 这些发现为PTPN22在自身免疫性疾病中的作用提供了新的视角.
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