JCI:骨髓性白血病IFN-γ调节的差异要求决定了移植物抗白血病的抗性和敏感性

2017-06-13 Yara MedSci原创

该研究确定了IFN-γ刺激作为BC-CML和AML GVL耐药机制的先决条件,而与IFN-γ的独立性使得CP-CML更具有GVL敏感性,即使具有较低水平的同种异体反应。

同种异体造血干细胞移植(alloSCT)中的移植物抗白血病(GVL)效应对慢性期慢性髓细胞性白血病(CP-CML)是有效的,但是爆发危机CML(BC-CML)和急性骨髓性白血病(AML)是对GVL有抗性。为了了解GVL耐药性,研究人员研究了GVL对小鼠模型的影响,该模型通过用人白血病融合cDNA转导小鼠BM产生的CP-CML,BC-CML和AML。先前的工作表明,CD4 + T细胞介导的GVL对CP-CML和BC-CML需要完整的白血病MHCII;然而,来自两个白血病的干细胞均为MHCII阴性。在这里,研究人员发现CP-CML,BC-CML和AML干细胞在同种异体受体中上调MHCII。使用基因缺陷型白血病,他们确定了BC-CML和AML MHC上调需要IFN-γ刺激,而CP-CML MHC上调与IFN-γ受体(IFN-γR)和IFN-γ/γ受体无关IFNAR1。重要的是,IFN-γR缺陷型BC-CML和AML对CD4 +和CD8介导的GVL是完全耐药的,而IFN-γR/ IFNAR1双缺陷型CP-CML完全具有GVL敏感性。小鼠AML和BC-CML干细胞是没有IFN-γ刺激的MHCI +,表明IFN-γ通过MHC上调以外的机制使这些白血病对T细胞杀伤敏感。该研究确定了IFN-γ刺激作为BC-CML和AML GVL耐药机制的先决条件,而与IFN-γ的独立性使得CP-CML更具有GVL敏感性,即使具有较低水平的同种异体反应。

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    2018-04-26 yige2012
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    2017-07-28 xuyong535
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    2017-06-15 bugit
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