向VCP通过STING稳定增强结直肠癌治疗
Hongdao Zhu1, Fujing Ge1, Jingyu Dai1
1Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, China.
Journal for immunotherapy of cancer
|November 19, 2025
概括
向含瓦洛辛蛋白 (VCP) 稳定了STING蛋白,增强了干扰素基因 (cGAS-STING) 循环GMP-AMP合成酶刺激通路. 这种方法可以增强抗瘤免疫力,并克服结直肠癌 (CRC) 中的免疫疗法耐药性.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 微卫星稳定的结直肠癌 (CRC) 对免疫疗法表现出耐药性,这构成了重大的临床挑战.
- 重新激活干扰素基因 (cGAS-STING) 循环GMP-AMP合成酶刺激器通路是克服免疫抑制瘤微环境的关键策略.
- 目前的STING激动剂由于药物稳定性差以及潜在的细胞因子风暴而面临限制.
研究的目的:
- 为了确定可用药物的标,可以增强CRC中的cGAS-STING驱动的抗瘤免疫力.
- 确定含有瓦洛的蛋白质 (VCP/p97) 作为增强免疫治疗疗效的新疗法标.
- 调查VCP在调节STING蛋白质稳定中的作用及其对结直肠癌治疗的影响.
主要方法:
- 生物信息学分析,化合物查和全基因组CRISPR查确定了VCP作为cGAS-STING通路的调节者.
- 西方涂抹,共免疫沉和免疫光证实了VCP与STING蛋白稳定性的相互作用和调节.
- 在体内研究中使用小鼠CRC模型 (MC38和CT26) 来评估单独和与STING激动剂,化疗和免疫疗法结合的VCP抑制 (CB-5083) 的治疗效果.
主要成果:
- 确定VCP是STING的关键负调节器,直接与其蛋白质稳定性相互作用和调节.
- 使用CB-5083抑制VCP稳定了STING,增加了内分泌网膜 (ER) 定居的STING,并放大了STING激动剂诱导的信号传递.
- 涉及VCP抑制的组合疗法协同抑制了瘤生长,增强了化疗和免疫疗法的抗瘤疗效,并通过增加CD86+巨细胞和CD8+T细胞透来重塑瘤微环境.
结论:
- 含有瓦洛辛的蛋白质 (VCP) 被确定为STING蛋白质定位的新型调节剂.
- 药理上抑制VCP可以通过增加ER居住性STING来增强抗瘤免疫力.
- 这种VCP抑制策略提供了一种临床可行的方法,以改善结直肠癌的免疫治疗结果.
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