Blood:应以微小残留病灶检测阴性作为高风险多发性骨髓瘤的治疗终点

2020-08-04 MedSci原创 MedSci原创

与标准细胞遗传学异常(CA)风险的病例相比,携带高CA风险的多发性骨髓瘤(MM)患者尽管达到了相似的完全缓解(CR)率,但预后较差。

与标准细胞遗传学异常(CA)风险的病例相比,携带高CA风险的多发性骨髓瘤(MM)患者尽管达到了相似的完全缓解(CR)率,但预后较差。这质疑了CR作为高危型MM的治疗终点的合理性,并且代表了对于标准和高危型CA患者在治疗后仍然残留肿瘤细胞的生物学难题。

Goicoechea等采用二代流式(NGF)来评估PETHEMA/GEM2012MENOS65试验招募的标准(n=300) vs 高 CA风险(n=200)的MM患者的可检测的残留病灶(MRD),以明确两个患者亚组中决定MRD抵抗的机制。

未检测到MRD的患者的36个月无进展生存期和总生存率均高于90%,具有标准风险或高 CA风险的病例之间无明显差异(P≥0.202)。持续MRD导致标准和高 CA风险患者的中位无进展生存期分别大约只有3年和2年(P<0.001)。

进一步用NGF分离MRD,然后对配对的MRD肿瘤细胞进行全基因组测序,发现具有标准CA风险的MM患者的克隆选择更多,高风险MM患者有更多的继发突变、基因组不稳定性更高,未发现驱动MRD抵抗的统一的缺失或获得性遗传变异。

相反,MRD肿瘤细胞的RNA测序揭示了高风险MM中具有单一转录程序和ROS介导的MRD抵抗的MRD克隆选择。本研究支持将无法检测到MRD作为高CA风险的MM患者的治疗终点,并提议表征MRD克隆以了解和克服MRD抵抗。

原始出处:

Ibai Goicoechea,et al. Deep MRD profiling defines outcome and unveils different modes of treatment resistance in standard and high risk myeloma. Blood. July 21,2020.

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    2021-04-26 jml2009
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    2020-09-17 ms4000000956890434

    👌

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    2020-08-05 ms3000000449926787

    学习

    0

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