Leukemia:Guadecitabine(SGI-110)在外周T细胞淋巴瘤中的综合临床评估

2022-05-06 xiaozeng MedSci原创

guadecitabine治疗外周T细胞淋巴瘤具有可接受的总体反应率和药物毒性特征。

外周T细胞淋巴瘤(PTCL)是一种罕见的异质性恶性肿瘤,该疾病复发时伴随着患者不良的预后。既往研究结果显示,PTCL对于表观遗传相关靶向药物具有较高的敏感性。

低甲基化药物(HMA)是一类表观遗传学抗肿瘤药物,既往研究显示其在PTCL中具有一定的作用,伴随着与骨髓增生异常综合征(MDS)共同的遗传突变。研究人员发现,滤泡辅助性T细胞来源的PTCL对阿扎胞苷(azacitidine)的反应率可观。


Guadecitabine(SGI-110)是一种寡核苷酸的地西他滨类似物,研究显示其对MDS有效。在该研究中,研究人员主要展示了guadecitabine在PTCL中的II期临床试验结果。通过对临床数据进行相关分析和功能基因组筛选,以更好地识别相关的表观遗传调节因子。


患者的治疗反应汇总表

 

在这项II期单臂试验中,PTCL患者在28天的治疗周期中的第1-5天接受guadecitabine治疗。该试验的主要终点是患者的总体反应率(ORR)和药物的安全性。转化子研究包括无细胞血浆DNA测序和功能基因组筛选,表观遗传学靶向的CRISPR/Cas9文库识别相关反应预测因子。


结果显示,在20名复发性/难治性患者中,ORR为40%,其中10%达到完全缓解。最常见的3-4级不良事件包括中性粒细胞减少症和血小板减少症。患者的中位随访时间为10个月,在此期间患者的中位无进展生存期(PFS)和总生存期(OS)分别为2.9个月和10.4个月。


患者的治疗反应图

进一步的研究显示,RHOA G17V突变与PFS的改善相关。4/7的携带TP53突变的患者对治疗有反应。组蛋白甲基转移酶SETD2的缺失则表现出对HMA的敏感性,但TET2的缺失则无显著性。


总而言之,该研究结果显示,guadecitabine治疗具有可接受的总体反应率和药物毒性特征,地西他滨类似物联合靶向组蛋白甲基转移酶的治疗策略或为外周T细胞淋巴瘤的治疗提供潜在的基础。


原始出处:

Wong, J., Gruber, E., Maher, B. et al. Integrated clinical and genomic evaluation of guadecitabine (SGI-110) in peripheral T-cell lymphoma. Leukemia (22 April 2022).

https://doi.org/10.1038/s41375-022-01571-8

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