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异位CD11c驱动SMAD3介导的异常抗原呈现和上皮-半神经过渡在食道状细胞癌中
Han Liao1, Xuan Zhao1, Liping Chen1
1Department of Etiology and Carcinogenesis, National Cancer Center/National Clinical Research Center/Cancer Hospital, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, P. R. China.
在食道状细胞癌 (ESCC) 中异位CD11c表达通过激活SMAD3通路来驱动免疫逃避和恶性瘤. 针对这种CD11c-SMAD3轴可能会改善ESCC患者的免疫治疗疗效.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 食道状细胞癌 (ESCC) 是具有侵略性的,免疫逃避对进展和治疗耐药性至关重要.
- 瘤-肌瘤相互作用和表皮-介质细胞过渡 (EMT) 在免疫反应中的作用尚未完全理解.
- 研究ESCC细胞表型变化对免疫调节的影响至关重要.
研究的目的:
- 阐明ESCC细胞的表型变化如何影响瘤免疫微环境.
- 确定将EMT,免疫逃避和ESCC进展联系在一起的分子机制.
- 探索ESCC瘤微环境中的潜在治疗点.
主要方法:
- 在4 - 尼托基诺林-1-氧化物 (4-NQO) 诱导的小鼠ESCC模型中利用多重免疫光.
- 集成的多组数据:空间转录组,单细胞RNA测序和来自人类食道样本的蛋白组.
- 在体外细胞系和体内人性化小鼠模型中验证的发现.
主要成果:
- 在小鼠和人类中鉴定出一种ESCC细胞集群,具有异位CD11c (整合素αX) 表达,与TP53无活化有关.
- CD11c损害了抗原呈现,并通过SMAD3酸化促进了EMT.
- 在人性化的模型中,CD11c-SMAD3轴的激活导致了免疫逃避,转移和抗PD-L1治疗抵抗.
结论:
- 在ESCC中宫外CD11c表达会诱导免疫抑制和恶性表型.
- CD11c-SMAD3轴是驱动ESCC免疫逃避和进展的关键机制.
- 针对CD11c-SMAD3通路提供了一种潜在的策略,以提高ESCC免疫疗法的疗效.
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