在巴德特-比德尔综合征中,拼接切换反意义寡核酸纠正了密码外子的包含,并恢复了SDCCAG8蛋白
Kelleen E McEntee1,2, Bailey L McCurdy3, Austin Larson4
1Department of Biochemistry and Molecular Genetics, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
反感性寡核酸 (ASO) 可以通过准SDCCAG8基因中的密码外基因来纠正巴德特-比德尔综合征 (BBS) 的拼接缺陷. 这种方法显示出恢复基因表达和治疗由拼接错误引起的BBS的希望.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 在RNA治疗方面,RNA疗法.
背景情况:
- 巴德特-比德尔综合征 (BBS) 是一种遗传性疾病,其特征是纤毛病,导致渐进的视力丧失和肥胖.
- 在SDCCAG8基因 (BBS16) 中的特定突变可以导致异常拼接,包括隐秘的外因子含入,导致过早终止子和蛋白质功能的丧失.
- 目前对BBS的治疗策略有限,这凸显了针对潜在遗传缺陷的新型治疗方法的需要.
研究的目的:
- 调查反感性寡核酸 (ASO) 在患者衍生细胞中纠正SDCCAG8基因异常拼接的潜力.
- 确定特定的ASO,可以恢复SDCCAG8的第7号和第8号外子之间的正常拼接,从而防止加密的外子包含.
- 评估ASO治疗在恢复SDCCAG8基因表达和蛋白质水平方面的疗效.
主要方法:
- 在SDCCAG8.8中对20个核酸抗意义寡核酸 (ASO) 进行系统选,以针对患者特异性突变和神秘的外因子拼接部位.
- 使用RT-PCR测定来评估ASO治疗后患者衍生纤维细胞中的外显子7和8拼接模式.
- 使用RNA测序和西部涂抹来确认ASO介导的野生类型SDCCAG8转录和蛋白质水平的恢复.
主要成果:
- 能够纠正异常SDCCAG8拼接的ASO的识别,恢复正常的exon 7-8的包含.
- 一种针对隐秘的外因子拼接部位的突变无关的ASO证明了显著的有效性,将外因子7-8拼接增加到26%,并将SDCCAG8蛋白恢复到大约40%的野生类型水平.
- ASO治疗成功地从患者细胞中无法检测到的水平中拯救了SDCCAG8表达.
结论:
- 反感性寡核酸治疗是一种可行的策略,用于纠正Bardet-Biedl综合征中的SDCCAG8拼接缺陷.
- 一种针对密码外子纳入的突变无关的ASO方法为具有类似拼接错误的多个BBS患者提供了一个有前途的治疗途径.
- 这些发现为临床开发基于ASO的治疗与SDCCAG8拼接异常相关的BBS提供了分子基础.
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