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TRIM63/IRF-8轴促进瘤进展和黑色素瘤的免疫抑制,具有BRAF突变

Fei Yi^1,2, Shuotong Liu³, Yan Ma⁴

¹Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, Guangdong, China. yifeifigo@foxmail.com.

Cell death & disease

|November 28, 2025

概括

在黑色素瘤中,E3结合酶TRIM63过度表达,通过BRAF突变促进瘤生长. 化TRIM63 (pS69) 导致IRF-8降解,与黑色素瘤患者的不良预后和免疫抑制相关.

科学领域:

在瘤学瘤学.
分子生物学分子生物学
生物化学生物化学

背景情况:

E3结合酶TRIM63与黑色素瘤恶性瘤有关,特别是在BRAF突变病例中.
像V600E这样的BRAF突变在黑色素瘤中很常见,但瘤发生机制尚不清楚.

研究的目的:

阐明TRIM63促进黑色素瘤进展的机制,特别是在BRAF突变的背景下.
研究TRIM63酸化及其下游点在黑色素瘤发病过程中的作用.

主要方法:

在黑色素瘤细胞中评估TRIM63表达.
研究了MAPK通路激活对TRIM63.3的影响.
通过生物化学分析分析了TRIM63在S69的酸化及其与IRF-8的相互作用.
通过TRIM63.3调解确定了IRF-8的无处不在和降解.
与患者预后和免疫状况相关的临床数据,包括pS69 TRIM63水平.

主要成果:

在黑色素瘤中,TRIM63过度表达,其致癌活性取决于MAPK通路的激活.
在S69.63,BRAF突变触发了TRIM63的ERK1/2-介导酸化.
化TRIM63 (pS69) 与IRF-8结合,导致其在K250.0处无处不在和降解.
通过TRIM63降解IRF-8,增强了瘤的进展.
升高的pS69 TRIM63水平与瘤免疫抑制和患者预后不佳相关.

结论:

在黑色素瘤中,TRIM63通过BRAF-MAPK-ERK1 / 2依赖的途径促进IRF-8降解,从而起到显著的致癌作用.
酸化TRIM63 (pS69) 是瘤进展和黑色素瘤免疫逃避的关键调解剂.
TRIM63,特别是其酸化形式,是黑色素瘤治疗的潜在治疗点.

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