NEJM:自体慢病毒基因疗法治疗腺苷脱氨酶缺陷所致重症联合免疫缺陷症

2021-05-27 MedSci原创 MedSci原创

离体慢病毒HSPC基因疗法可治疗腺苷脱氨酶缺陷所致重症联合免疫缺陷症,患者总生存率和无事件生存率提高,治疗后ADA持续表达,可实现代谢校正和功能性免疫重建

腺苷脱氨酶(ADA)缺陷所致重症联合免疫缺陷症 (ADA-SCID)是一种罕见且危及生命的原发性免疫缺陷。由于ADA缺陷可导致患者腺苷和脱氧腺苷积累,抑制DNA的合成修复,导致胸腺细胞发育异常,患者伴有严重的淋巴细胞减少,免疫功能受损,发育不良。未经治疗患者多在2岁前死于感染近日研究人员考察了自体体外慢病毒基因疗法对ADA-SCID的治疗效果。

50例ADA-SCID患者(其中30例来自美国,20例来自英国)参与研究,使用自体CD34+造血干细胞和祖细胞(HSPCs),在体外转导了一种编码人类ADA的自失活慢病毒载体,研究随访24-36个月。研究的主要终点为总生存率,次要终点为无事件生存率,定义为无需重新开始酶替代疗法或挽救性异基因造血干细胞移植。

随访中,患者总生存率均为100%。美国研究中,12个月时的无事件生存率为97%,24个月时为97%。英国研究中,12个月时的无事件生存率为100%,24个月时为95%,36个月时为95%。美国研究30名患者中的29名,以及英国研究中20名患者中的19名,在接受持续输注基因修饰的HSPC后使得ADA活性水平正常化。治疗后,患者免疫重建稳定,90%的美国患者以及100%的英国患者在研究结束时停止了免疫球蛋白替代治疗。两项研究中均未发现单克隆扩增、白细胞增生并发症或出现具有复制能力的慢病毒证据,也没有发生自身免疫或移植物抗宿主病事件,大多数不良事件的等级较低。

英国队列及美国队列患者无事件生存率

离体慢病毒HSPC基因疗法可治疗腺苷脱氨酶缺陷所致重症联合免疫缺陷症,患者总生存率和无事件生存率提高,治疗后ADA持续表达,可实现代谢校正和功能性免疫重建

原始出处:

Donald B. Kohnet al. Autologous Ex Vivo Lentiviral Gene Therapy for Adenosine Deaminase Deficiency. N Engl J Med, May 27, 2021.

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    2021-06-08

    厉害 非常好的文章 特别棒的学习平台

    0

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    2021-05-29 ymljack
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    2021-05-27 旺医

    顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息

    0

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    2021-05-27 wxl882001

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