CLIN CANCER RES:单核细胞和粒细胞降低接受Daratumumab治疗患者骨髓瘤细胞CD38表达

2017-12-22 MedSci MedSci原创

Daratumumab治疗会导致骨髓瘤CD38表达显着降低。CLIN CANCER RES近期发表了一篇文章,研究Daratumumab导致的CD38降低机制及临床意义。

Daratumumab治疗会导致骨髓瘤CD38表达显着降低。CLIN CANCER RES近期发表了一篇文章,研究Daratumumab导致的CD38降低机制及临床意义。

作者研究了Daratumumab单药或联合来那度胺-地塞米松对骨髓瘤细胞和非肿瘤免疫细胞CD38表达的影响。Daratumumab单药数据来源于GEN501研究,Daratumumab联合那度胺-地塞米松数据来源于GEN503研究。作者还进行了体外实验。研究结果表明,在开始注射几小时内Daratumumab便降低骨髓瘤CD38表达,与反应深度和持续时间无关。此外,非肿瘤免疫细胞CD38表达,包括NK细胞,T细胞,B细胞和单核细胞在治疗期间也下降。深入分析表明骨髓瘤细胞CD38水平只有在补体或效应细胞存在时才会降低,说明CD38高表达骨髓瘤细胞的快速清除与CD38降低有关。此外,研究还发现Daratumumab-CD38复合物和其附着的细胞膜从骨髓瘤细胞中转移到单核和粒细胞中,这一过程称为trogocytosis。trogocytosis也与其他膜蛋白降低有关,包括CD49d,CD56和CD138。

文章最后认为,Daratumumab快速降低CD38表达水平,部分原因是trogocytosis过程。重要的是,这些效应也在深度和持续反应中存在,因此可以排除CD38降低单独作为Daratumumab的耐药机制。

原始出处:
Jakub Krejcik,Kris A. Frerichs,et al.Monocytes and Granulocytes Reduces CD38 Expression Levels on Myeloma Cells in Patients Treated with Daratumumab.CLIN CANCER RES.December 2017 doi:10.1158/1078-0432.CCR-17-2027

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    2018-10-27 snf701207
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    2017-12-24 大爰

    学习了谢谢分享!!

    0

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    2017-12-24 yese
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    2017-12-23 大爰

    学习并分享!!

    0

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