瘤蛋白SND1丰富的外体通过调节CD47-SIRPα介导的巨细胞重编程来促进黑色素瘤肺转移
Yuankun Chen1, Xinting Wang2, Hongshuai Li1
1State Key Laboratory of Experimental Hematology, Key Laboratory of Cellular and Molecular Immunology in Tianjin, and Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Tianjin Medical University, Tianjin, China; Department of Biochemistry and Molecular Biology, Department of Immunology, School of Basic Medical Science, Tianjin Medical University, Tianjin, China.
Cancer letters
|September 27, 2025
概括
在瘤外体中含有1 (SND1) 的葡萄球菌核酶和图多尔域通过抑制抗瘤免疫力促进转移. 削弱SND1增强了巨细胞的抗瘤活性,并减少了黑色素瘤的传播.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 葡萄球菌核酶和Tudor域含有1 (SND1) 是一种在各种瘤中发现的瘤蛋白.
- SND1富含瘤衍生的外体细胞 (TEX),这表明它在瘤微环境 (TME) 中发挥作用.
研究的目的:
- 研究SND1在TEX中的作用及其对巨细胞两极分化和黑色素瘤转移的影响.
- 阐明SND1影响免疫反应和转移的机制.
主要方法:
- 在TEXs中对SND1丰富的数据库分析.
- 在体内研究中,使用具有野生类型和SND1缺陷外体的黑色素瘤小鼠模型.
- 分析巨细胞极化,细胞和免疫信号通路 (例如cGAS-STING).
主要成果:
- SND1充当TEX标记物,通过丰富外体CD47来促进肺转移,从而抑制巨细胞灭菌.
- 缺少SND1的外体 (ExoSND1-KO) 促进M1巨细胞的两极分化和抗瘤免疫力.
- 异位SND1-KO被细胞化,激活cGAS-STING通路并增加炎症性细胞因子分泌.
结论:
- 在TEXs中的SND1促进免疫逃避和转移.
- 向瘤细胞中的SND1丰富提供了一个潜在的策略,通过重编程免疫微环境来抑制瘤转移.
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