Blood:CD49d促进慢性淋巴细胞白血病进展

2020-02-06 QQY MedSci原创

中心点:CD49d双峰表达的CLL患者占CLL的20%,表现出截然不同的临床生物学特征。CD49d对预后的影响随着将CD49d双峰表达的纳入而增强。摘要:CD49d是慢性淋巴细胞白血病(CLL)一个显著的预后生物标志物。经过广泛验证的30%的CLL阳性细胞阈值可以将CLL患者分为两个预后不同的亚组,但未考虑到CD49d的表达模式。在本研究中,研究人分析了1630例CLL样本,发现约20%的CLL病

中心点:

CD49d双峰表达的CLL患者占CLL的20%,表现出截然不同的临床生物学特征。

CD49d对预后的影响随着将CD49d双峰表达的纳入而增强。

摘要:

CD49d是慢性淋巴细胞白血病(CLL)一个显著的预后生物标志物。经过广泛验证的30%的CLL阳性细胞阈值可以将CLL患者分为两个预后不同的亚组,但未考虑到CD49d的表达模式。

在本研究中,研究人分析了1630例CLL样本,发现约20%的CLL病例(313例)具有CD49d双峰表达,即同时存在CD49dpos亚群和CD49dneg亚群。与CD49d表达均匀的CLL患者中所观察到的高度稳定的CD49d表达不同,CD49d双峰表达的CLL样本显示出更高的变异性,并且CD49dpos亚群随治疗时间的推移而增加。

来源CD49d双峰表达的CLL患者的CD49dpos亚群比CD49dneg细胞具有更高的增殖水平,在骨髓中比在外周血(PB)和表达CXCR4dim/CD5bright表型的PB CLL亚群中有更多见,已知在增殖细胞中富集。

临床角度来看,CD49d双峰表达的CLL患者,无论其CD49dpos亚群是否超过30%的临界值,在化疗免疫治疗(1522例)和依鲁替尼(158人)治疗背景下的临床行为均与CD49dpos CLL患者的相似。

总之,本研究结果提示CD49d可驱动CLL的疾病进展,CD49d的表达模式也应该被纳入考虑,以改善这种生物标志物在CLL中的预后影响。

原始出处:

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