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在Usher综合征1F型模型中,PCDH15双AAV基因疗法用于耳聋和失明

Maryna V Ivanchenko¹, Daniel M Hathaway¹, Eric M Mulhall¹

¹Department of Neurobiology, Harvard Medical School, Boston, Massachusetts, USA.

The Journal of clinical investigation

|October 23, 2024

概括

对阿舍尔综合征1F型 (USH1F) 的基因治疗使用双AAV系统来输送PCDH15基因. 这种方法在小鼠模型中成功恢复了听力和平衡,并在视网膜组织中显示出有希望的结果.

科学领域:

遗传学遗传学是一个
眼科医生眼科眼科
耳鼻喉科耳鼻喉科耳鼻喉科

背景情况:

艾舍氏综合征1F型 (USH1F) 是一种遗传性疾病,导致先天性听力和平衡丧失,以及渐进的视力障碍.
原cadherin-15 (PCDH15) 基因的突变是USH1F的原因.
目前的基因治疗方法面临的挑战是将全长的PCDH15基因包装成单个腺相关病毒 (AAV).

研究的目的:

开发和评估一种双AAV基因治疗策略,用于在Usher综合征1F型中输送全长PCDH15基因.
评估这种双AAV方法在恢复USH1F小鼠模型中的听力和平衡功能的有效性.
在相关的人类视网膜模型中确定这种基因疗法的潜力.

主要方法:

设计了一种双AAV向量系统,以提供完整的PCDH15编码序列,克服单个AAV包装的限制.
治疗疗效在专门针对阿舍尔综合征1F型开发的小鼠模型中进行了测试.
分析了PCDH15蛋白表达在人类视网膜器官和非人类灵长类动物视网膜扩展物中.

主要成果:

双AAV策略成功地在USH1F小鼠模型中产生了全长PCDH15基因.
在接受USH1F治疗的小鼠中观察到听力和平衡功能的恢复.
在人类视网膜有机体和灵长类动物视网膜中的光受体和体过程中证实了有效的PCDH15蛋白表达.

结论:

双AAV方法代表了提供PCDH15等大型基因的可行策略,用于阿舍尔综合征1F型基因治疗.
这种方法显示出解决与USH1F相关的听力,平衡和视力障碍的巨大潜力.
这种双AAV系统的进一步开发可以为治疗USH1F的临床应用铺平道路.

关键词:

基因治疗是一种基因疗法.遗传性疾病是一种遗传性疾病.眼科医生眼科眼科耳鼻科耳鼻科耳鼻科耳鼻科

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