CELL:适应性免疫抗性从肿瘤起始干细胞中出现

2019-05-02 海北 MedSci原创

我们的身体配备了强大的免疫监视功能,可以清除癌细胞。至今为止,我们对于形成和传播癌症的肿瘤起始干细胞(tSCs)如何装备自己,克服这一障碍仍然知之甚少。

我们的身体配备了强大的免疫监视功能,可以清除癌细胞。至今为止,我们对于形成和传播癌症的肿瘤起始干细胞tSCs)如何装备自己,克服这一障碍仍然知之甚少。

为了解决这个问题,研究人员设计了一种鳞状细胞癌(SCC)的皮肤癌模型,可以通过基于过继细胞毒性T细胞转移(ACT)的免疫疗法进行有效的挑战。

利用单细胞RNA测序(RNA-seq)和谱系示踪,研究人员发现转化生长因子βTGF-β)响应的tSCs在抗ACT方面具有优势,是肿瘤复发的根源。

进一步探测机制的时候,研究人员发现,在恶性肿瘤期间,tSCs选择性地获得CD80,这是一种先前在免疫细胞上发现的表面配体。此外,在接触细胞毒性T淋巴细胞抗原-4CTLA4)后,表达CD80tSC直接抑制细胞毒性T细胞活性。

相反,在CTLA4-TGF-β阻断免疫疗法或Cd80消融后,tSC变得脆弱,在ACT治疗后肿瘤复发减少。

该研究结果将tSCs置于如何激活免疫检查点通路的关键时刻。


原始出处:

Miao Y et al. Adaptive Immune Resistance Emerges from Tumor-Initiating Stem Cells. CELL, 2019; doi: 10.1016/j.cell.2019.03.025.


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    2020-02-01 yige2012
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    2019-09-29 维他命
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    2019-05-06 清风拂面

    谢谢分享学习

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