myCAF衍生的外体PWAR6通过改变胺可用性和NK细胞功能在瘤微环境中加速CRC肝转移
Hongsheng Fang1,2, Weixing Dai1,2, Ruiqi Gu1,2
1Department of Colorectal Surgery, Fudan University Shanghai Cancer Center, Shanghai, China.
Journal of hematology & oncology
|December 19, 2024
概括
肌纤维细胞癌相关纤维细胞 (myCAFs) 通过外体细胞促进结直肠癌 (CRC) 通过肝脏转移. 在转移中升高的lncRNA PWAR6驱动CRC进展和免疫逃避,提供治疗点.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 结直肠癌 (CRC) 的肝转移是一个重大的临床挑战,影响患者的存活率.
- 肌纤维细胞癌相关纤维细胞 (myCAFs) 是CRC瘤微环境的关键组成部分,通过外体驱动进展和转移.
研究的目的:
- 研究myCAF衍生的外体和特定分子在结直肠癌肝转移 (CRLM) 的作用.
- 阐明PWAR6对CRC进展和免疫规避的贡献背后的分子机制.
- 评估PWAR6作为CRLM的预后标志物和治疗标.
主要方法:
- 单细胞分析以确定CRLM中的myCAF种群.
- 外基因组测序以发现关键分子参与者,如PWAR6.
- 在体外和体内测试以评估PWAR6在CRC干部,迁移和谷氨酸吸收中的功能.
- 分子测试 (RNA拉向,RIP,Co-IP) 来确定PWAR6/NRF2/SLC38A2信号轴.
- 流式细胞计量用于评估自然杀手 (NK) 细胞活性和细胞毒性.
主要成果:
- 在CRLM组织的myCAF衍生的外体中,PWAR6显著升高,并与增加的Ga FAPI-PET/CT SUVmax相关.
- PWAR6表达与患者的治疗结果更差相关,将其确定为负的预后标志物.
- 从机制上讲,PWAR6抑制NRF2降解,上调SLC38A2,增强CRC细胞的谷氨酸吸收,并损害NK细胞的功能,促进免疫逃避.
结论:
- 来自myCAFs的外体PWAR6是CRC肝转移的关键标志物和驱动因素.
- 在临床前模型中,针对PWAR6使用反感性寡核酸 (ASO-PWAR6),可能与FAPI治疗相结合,显示出对临床前模型中CRLM管理的治疗承诺.
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