一种深度内基拼接改变的AIRE变体通过反意义寡核酸可向的伪子包含导致APECED综合征
Sebastian Ochoa1, Amy P Hsu1, Andrew J Oler2
1Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
Science translational medicine
|September 18, 2024
概括
在AIRE基因中发现的一种新发现的深层内基因变异,通过创建一个伪exon,导致自身免疫多基因内基因病变 - - 淋巴瘤 - - 皮肤外 (APECED). 这种在波多黎各人口中普遍存在的遗传机制,可以通过反意义寡核酸逆转.
科学领域:
- 遗传学 遗传学 是一个
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 自身免疫性多发性肌病 - - 淋巴病 - - 皮膜外皮变 (APECED) 是一种罕见的,危及生命的自身免疫性疾病.
- 它主要是由自身免疫调节基因 (AIRE) 的突变引起的.
研究的目的:
- 在缺乏典型的AIRE基因变异的患者中调查APECED的遗传基础.
- 识别新的致病机制,并探索治疗策略.
主要方法:
- 全基因组测序以确定遗传变异.
- 细胞培养系统 (树突细胞,淋巴状细胞系) 用于研究基因表达和拼接.
- 蛋白质建模和转录基因分析.
- 反感性寡核酸 (ASO) 疗法开发.
主要成果:
- 在17%的患者中,特别是那些来自波多黎各的患者中,发现了一种深度内在的AIRE变体 (c.1504-818 G>A).
- 这种变异激活了一个神秘的拼接部位,导致包含一个伪子和一个非功能性的AIRE蛋白.
- ASO治疗成功地逆转了伪子的包含,并在患者衍生细胞中恢复了正常的AIRE转录序列.
结论:
- c.1504-818 G>A AIRE变异是一种创始突变,在波多黎各人口中引起APECED.
- 伪子含有是一种新的,ASO可逆的基因机制,是APECED的基础.
- 这项研究强调了研究致病变异的非编码区域的重要性.
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