在瘤细胞中,HMGN2通过调节STT3B/PD‐L1/caspase‐1/GSDMD轴来诱导灭
Wenwen Han1, Hongli Chen1, Bomiao Cui1
1State Key Laboratory of Oral Diseases and National Clinical Research Centre for Oral Diseases and West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, P.R. China.
细胞外高流动性组核细胞结合域2 (HMGN2) 蛋白质通过结合STT3B受体诱导瘤细胞死亡. 这种相互作用激活了STT3B/PD-L1/caspase-1/GSDMD通路,导致癌细胞中的烧灭.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 癌症研究 癌症研究
背景情况:
- 高流动性组核体结合域2 (HMGN2) 是一种由免疫细胞释放的核DNA结合蛋白.
- 已经证明HMGN2具有诱导瘤细胞亡的能力.
研究的目的:
- 在瘤细胞膜上识别HMGN2受体.
- 阐明HMGN2诱导瘤细胞亡和亡的机制.
主要方法:
- 流细胞测量用于对细胞亡的评估.
- 免疫沉和质谱 (IP/MS) 来识别HMGN2受体.
- 西方涂抹和免疫光以确认蛋白质相互作用.
- ZDOCK和AlphaFold3用于HMGN2-STT3B结合的结构分析.
主要成果:
- HMGN2与CAL-27瘤细胞膜结合,并诱导细胞亡.
- 寡糖糖转移酶亚单元STT3B (STT3B) 被确定为HMGN2.2的关键膜受体.
- 与STT3B结合的HMGN2增加了PD-L1/caspase-1/GSDMD轴的表达和PD-L1.1的核转移.
- 在瘤细胞中,HMGN2与STT3B结合诱导了灭.
结论:
- 细胞外HMGN2通过STT3B受体诱导瘤细胞灭.
- STT3B/PD-L1/caspase-1/GSDMD轴是一个由HMGN2调节的临界通路,用于诱导细胞死亡.
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