USP1-WDR48二基因酶复合体作为调节瘤相关巨细胞激活和抗瘤反应的分子开关起作用
Dianwen Han1, Lijuan Wang2, Shan Jiang1
1Department of Breast Surgery, General Surgery, Qilu Hospital of Shandong University, Jinan, China.
Cell death and differentiation
|July 24, 2025
概括
USP1-WDR48复合体控制着M2型瘤相关巨细胞 (TAMs) 的激活,这对癌症进展至关重要. 抑制这种复合体和CD47/SIRPα显示出协同的抗瘤效应,提供了新的乳腺癌治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 类似M2的瘤相关巨细胞 (TAMs) 是瘤微环境 (TME) 中的关键免疫抑制细胞.
- 它们的激活驱动癌症的进展和免疫疗法耐药性.
- 对于TAM激活的监管机制尚不清楚.
研究的目的:
- 阐明M2-TAM激活的调节机制.
- 研究USP1-WDR48复合体在TAM激活和癌症进展中的作用.
- 探索乳腺癌治疗的新型治疗点.
主要方法:
- 基于CRISPR-Cas9的基因工程小鼠模型 (USP1fl/flLyz2cre/+和WDR48fl/flLyz2cre/+).
- 分析USP1-WDR48与DDX3X的复合相互作用及其对DDX3X无处不在和稳定性的影响.
- 评估DDX3X在促进Jak1和Rac1转化和激活下游信号通路中的作用 (Jak1-Stat3/6,Rac1-Akt).
- 在体内对USP1/WDR48和CD47/SIRPα信号通路的联合抑制的评估.
- 对USP1蛋白表达与乳腺癌患者预后的相关性分析.
主要成果:
- 在USP1fl/flLyz2cre/+和WDR48fl/flLyz2cre/+小鼠中,瘤形成和肺转移的减少.
- 该USP1-WDR48复合体对DDX3X进行双化和稳定,促进M2-TAM激活.
- DDX3X增强了Jak1和Rac1的翻译,激活了Jak1-Stat3/6和Rac1-Akt通路.
- 联合USP1/WDR48和CD47/SIRPα抑制产生了协同作用的抗瘤效应.
- 瘤筋膜中的USP1表达是乳腺癌预后的独立预测因子.
结论:
- USP1-WDR48复合体作为M2-TAM激活和透的关键调节器.
- 准USP1-WDR48复合体是乳腺癌治疗的有希望的策略.
- 联合的抑制策略可能会提高乳腺癌治疗的疗效.
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