Leukemia:Guadecitabine在外周T细胞淋巴瘤患者中的疗效和安全性

2022-04-25 Nebula MedSci原创

Guadecitabine在外周T细胞淋巴瘤患者中展现出了可接受的总缓解率和毒性

外周 T 细胞淋巴瘤 (PTCL) 是一种罕见的异质性恶性肿瘤,复发时预后极差。值得庆幸的是,最新研究结果表明 PTCL 对表观遗传靶向药物的较为敏感。低甲基化制剂(HMA)阿扎胞苷在多发性骨髓瘤(MDS,一种 HMA 反应性疾病)的疗效显著。基于 PTCL 与 MDS 的突变谱重叠性,阿扎胞苷在 PTCL 患者中也显示出了极具希望的疗效。

瓜地西他滨(Guadecitabine)是地西他滨类似物,在 MDS 患者中展现出了较好疗效。研究人员推测,PTCL 患者或也可从瓜地西他滨治疗中获益。

本研究是一项单中心的II期临床试验,招募了年满18岁的ECOG表现状态≤3分、组织学明确诊断、未治疗过的或复发性/难治性 PTCL 患者,予以瓜地西他滨(60 mg/m2)治疗,第1-5天/28天,直到疾病进展。主要终点是总缓解率(ORR)和安全性。


无进展生存率和总生存率

2018年6月至2020年1月期间共招募了 20 位患者(两位是初治患者,18位是复发/难治性 PTCL)。中位随访了10个月,总缓解率为40%,包括10%的完全缓解。中位无进展生存期(PFS)和总生存期(OS)分别是2.9个月和10.4个月。最常见的3-4级不良反应有中性粒细胞减少症和血小板减少症。


受试患者ctDNA的突变谱

在探索性分析中,RHOAG17V突变与无进展生存期延长相关(中位时间:5.47 vs 1.35个月,p=0.02)。4/7的携带 TP53 突变的患者获得缓解。组蛋白甲基转移酶 SETD2 缺失可增加患者对 HMA 的敏感性,但 TET2 缺失无此效应。

总而言之,瓜地西他滨(Guadecitabine)在外周 T 细胞淋巴瘤患者中展现出了可接受的总缓解率和毒性特征;地西他滨类似物可能为未来联合靶向组蛋白甲基转移酶的联合方案提供基础。

 

原始出处:

Wong Jonathan,Gruber Emily,Maher Belinda et al. Integrated clinical and genomic evaluation of guadecitabine (SGI-110) in peripheral T-cell lymphoma.[J] .Leukemia, 2022, https://doi.org/10.1038/s41375-022-01571-8

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