单细胞转录学揭示了细胞异质性和状通路驱动的结肠直肠癌进展的驱动因素
Jiahui Wang1, Yu Zhang1, Xinyi Chen1
1School of Science, China Pharmaceutical University, Nanjing 211198, China.
International journal of molecular sciences
|October 26, 2024
概括
这项研究揭示了如何使用单细胞RNA测序将状病变 (SLs) 进展为结直肠癌 (CRC). 它确定了关键的细胞亚型和分子驱动因素,为早期CRC诊断和治疗提供了洞察力.
科学领域:
- 胃肠病学 胃肠病学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 状病变 (SLs) 是在结直肠癌 (CRC) 发展中被公认为癌前的前体.
- 精确的分子机制驱动SLs向恶性瘤的进展尚未完全理解.
研究的目的:
- 通过单细胞RNA测序,阐明细胞和分子进展途径,从状病变到结直肠癌.
- 识别与CRC发育不同阶段相关的明显的上皮细胞和树皮细胞亚型.
主要方法:
- 单细胞RNA测序在正常的结肠组织和各种状病变 (高可塑性息肉 [HPs],状状病变 [SSLs],带有发育不良的状腺瘤 [SSLD]和传统的状腺瘤 [TSAs]) 上进行.
- 数据与现有的瘤数据集集集成,以分析转录景观.
- 进行了轨迹分析和分子驱动器验证.
主要成果:
- 确定了三种侵入性恶性上皮细胞亚型 (SLC1,SLC2,瘤细胞),其中SLC1与SSL和SLC2与TSA相关,表现出扩散和入侵的特征 (例如,EMT).
- 发现高可塑性息肉 (HPs) 不会发展为癌症,而不同的SL类型与高级CRCs的微卫星不稳定性 (MSI) 状态相关.
- 癌症相关纤维细胞 (CAF) 亚型在瘤微环境中被确定,通过FN1-CD44等途径促进侵袭和转移,并影响治疗反应.
结论:
- 状病变表现出明显的转录形状和细胞亚型,标志着朝着结直肠癌的进展.
- 特定的细胞亚型 (SLC1,SLC2) 和瘤微环境组件 (CAF) 在驱动入侵,转移和影响治疗结果方面发挥着关键作用.
- 了解这些跨状通路阶段的转录变化对于开发早期CRC诊断和向治疗的策略至关重要.
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