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首次编辑作为一个有前途的治疗策略,用于结节性表皮溶解 (bullosa)
Markus Hierl1, Johannes Bischof2, Bernadette Liemberger2
1EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University Salzburg, Salzburg, Austria; Department of Biosciences and Medical Biology, University of Salzburg, Salzburg, Austria.
概括
总编辑成功修复了COL17A1基因变异,导致人体细胞和小鼠模型的结节性表皮溶解 (JEB). 这种基因治疗方法恢复了蛋白质功能,并证明了安全性,为治疗基因皮肤病提供了希望.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 皮肤病学 皮肤病学
背景情况:
- 单一性疾病,如结节性表皮溶解 (JEB) 是由特定的基因突变引起的.
- 编码为 COL17A1 的 XVII 型原蛋白 (C17) 对皮肤完整性和干细胞功能至关重要.
- 目前对JEB的治疗方法侧重于症状管理,而不是基因纠正.
研究的目的:
- 开发和评估一种主要编辑 (PE) 策略,用于纠正致病性COL17A1变种.
- 评估基于PE的基因修复在JEB角质细胞和异种移植模型中的效率和安全性.
主要方法:
- 使用信使RNA (mRNA) 的首次编辑 (PE) 应用于初级人类JEB角质细胞.
- 基因编辑效率通过测量 COL17A1 校正来量化.
- 染色体完整性使用单个向链接介导PCR测序进行评估.
- 用异种移植的小鼠模型来评估基因纠正细胞的移植和扩张 in vivo.
主要成果:
- 在批量处理的JEB角质细胞中,PE达到高达60%的COL17A1编辑效率,恢复全长C17蛋白.
- 分析证实,在潜在的目标外部位没有显著的染色体异常.
- 在异种移植模型中,COL17A1校正的细胞在6周内成功地重新填充了92.2%的基底角质细胞层.
- 恢复C17表达赋予了被纠正的细胞在体内有选择性的优势.
结论:
- 主编辑是一种可行的和有效的策略,用于纠正与JEB相关的COL17A1变体.
- 这种PE方法证明了高安全性,最小的无意遗传改变.
- 在体内成功的基因修复和植入表明PE在治疗表皮质溶解牛皮和其他遗传性皮肤疾病方面的潜力.
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