Lancet:AAV2基因治疗RPE65突变引起失明安全且疗效持久

2016-07-01 崔倩 译 MedSci原创

在一项剂量递增的阶段1的研究中,对于由RPE65突变引起的遗传性视网膜营养不良个体,含有RPE65基因(AAV2-hRPE65v2)的重组腺相关病毒(AAV)载体进行单侧视网膜下注射已经显示出安全性和有效性。这一发现,并且伴随疾病的双向性和治疗中的预期用途,促使研究人员来确定参加阶段1研究的患者中使用AAV2-hRPE65v2管理对侧眼睛的安全性。原始出处:Jean Bennett,Jennife

在一项剂量递增的阶段1的研究中,对于由RPE65突变引起的遗传性视网膜营养不良,含有RPE65基因(AAV2-hRPE65v2)的重组腺相关病毒(AAV)载体进行单侧视网膜下注射已经显示出安全性和有效性。这一发现,伴随疾病的双向性和治疗中的预期用途,促使研究人员来确定参加阶段1研究的患者中使用AAV2-hRPE65v2管理对侧眼睛的安全性。此前一项研究也证明了基因治疗对眼病的疗效(NEJM:基因治疗让先天性失明患者重见光明,且长期有效

在后续的阶段1试验中,研究人员将总体积为300微升的一个剂量的AAV2-hRPE65v2(1.5×10e11载体基因组)视网膜下注射到11名儿童和成人(在第二次给药时年龄11-46岁)的对侧眼睛中,这些患者之前未注射过,这些患者是由于RPE65基因突变引起的遗传性视网膜营养不良,初次视网膜下注射后持续了1.71-4.58年。研究人员评估了安全性,免疫反应,视网膜和视觉功能,以及从基线至3年随访时视觉皮质的激活,观察正在进行中。

该研究没有报道与AAV有关的不良事件,与过程相关的不良事件大多是轻度的(三例患者发生陷凹,两例患者发生白内障)。一名患者因细菌性眼内炎而没有被纳入分析。研究人员注意到,大多数无显著免疫原性的患者疗效有所改善。与基线相比,10名参与者的汇总分析显示,从30天持续至3年注射的眼睛平均迁移率和全视野光敏感度有所改善(迁移率P=0.0003,白光全视场灵敏度p<0.0001),在同一时间段,先前注射的眼睛没有显著变化(迁移率p=0.7398,白光全视场灵敏度p=0.6709)。在汇集分析中,第二只眼睛或以前注射的眼睛从基线到3年时的变化不显著(与基线相比的所有时间点P>0.49)。

据研究人员所知,AAV2-hRPE65v2是施用至对侧眼的第一次成功的基因治疗。结果强调一些措施的使用,可帮助描述基因增强疗法对这种疾病产生极大益处的变量。

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    2016-08-12 feather89
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    2016-10-05 lxg951
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    2016-10-06 howi
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    2016-09-14 1e10c84am36(暂无匿称)

    文章不错,值得拜读

    0

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    2016-07-02 xuqianhua