来自MFAP2的癌症相关纤维细胞 (CAFs) 促进CRC增殖和转移,同时抑制CD8+ T细胞介导的抗瘤免疫力
Xu Zhang1, Yuxiang Fei2, Chunqi Xie3
1Department of Pharmacy, Chengdu Integrated TCM & Western Medicine Hospital, Chengdu University of TCM, 18# Wanxiang East Road, Chengdu, 610041, P.R. China.
与癌症相关的纤维细胞 (CAFs) 通过分泌MFAP5来驱动结直肠癌 (CRC) 的进展,MFAP5激活了抑制抗瘤免疫力的信号通路. 针对这种途径可能会改善CRC治疗结果.
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:
- 结肠直肠癌 (CRC) 的预后受到其瘤免疫微环境 (TIME) 的显著影响.
- 癌症相关纤维细胞 (CAFs) 在时间内促进瘤进展和免疫抑制.
- 在CAF-免疫系统相互作用中确定新的治疗点对于改善CRC患者的治疗结果至关重要.
研究的目的:
- 研究CAFs在CRC进展和免疫调节中的作用.
- 通过分析CAF-免疫相互作用来确定CRC治疗的新分子标.
- 阐明CAFs影响瘤微环境的信号机制.
主要方法:
- 对临床CRC样本和公共数据库的分析.
- 在体外和体内实验CRC的实验模型.
- 分子分析包括基因表达,蛋白相互作用和信号通路激活.
主要成果:
- 在CRC组织和CAF中发现了MFAP5表达的升高.
- 来自CAFs的MFAP5通过ITGB8在癌细胞上激活整体蛋白-FAK-ERK1/2信号级联.
- 这一途径导致ETS2激活,CYP27A1上调和通过LXRβ信号抑制CD8+T细胞功能,促进免疫衰竭和瘤进展.
结论:
- 由CAFs驱动的新型信号轴 (MFAP5-ITGB8-FAK-ERK1/2-ETS2-CYP27A1-LXRβ) 有助于CRC的进展和免疫抑制.
- 这个轴代表了CRC治疗的潜在治疗目标.
- 了解CAF介导的免疫调节为CRC的向免疫治疗策略提供了新的途径.
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