IBD:肠肌成纤维细胞促进结肠炎相关的癌症发生

2019-03-16 不详 MedSci原创

结肠炎相关癌症(CAC)是炎性肠病(IBD)远期并发症之一,并且预防CAC是IBD患者的关键问题。目前已知微环境中的肌成纤维细胞会影响肿瘤发展,但肠内肌成纤维细胞(IMF)在CAC中的作用尚未阐明,因此,本项研究旨在探究IMF在CAC中的作用。

背景
结肠炎相关癌症(CAC)是炎性肠病(IBD)远期并发症之一,并且预防CAC是IBD患者的关键问题。目前已知微环境中的肌成纤维细胞会影响肿瘤发展,但肠内肌成纤维细胞(IMF)在CAC中的作用尚未阐明,因此,本项研究旨在探究IMF在CAC中的作用。

方法
研究人员使用葡聚糖硫酸钠(DSS)构建发育异常和CAC小鼠模型。通过进行流式细胞术和RNA测序(RNA-seq)以获得IMF的无偏基因表达谱。通过RNA-seq,定量逆转录酶聚合酶链反应和免疫组织化学分析显着差异表达基因的转录组情况。

结果
研究结果显示正常肠成纤维细胞和IMF有1045个具有显着差异表达的基因。其中,生腱蛋白-C是本项研究关注的重点,发育异常模型中的生腱蛋白-C基因表达显着增加(P <0.05)。生腱蛋白-C蛋白在正常和非发育不良的粘膜中几乎不表达,但在发育不良病变周围的基质中强烈表达。此外,TNC包围并包裹整合素αvβ3阳性微血管。施用αvβ3整联蛋白拮抗剂ATN-161通过抑制血管生成显着抑制CAC的肿瘤发生(P <0.05)。

结论
本项研究结果表明在CAC的早期阶段,由IMF产生的TNC通过整合素αvβ3介导的血管生成影响肿瘤发展。肠肌成纤维细胞可能是预防CAC的新型治疗靶点。

原始出处:

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    2019-03-18 bnurmamat
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