由拼接缺陷引起的ATP6AP2相关疾病:异常的糖化和第一个受影响的女性
Alexandre Raynor1,2, Jean-Madeleine de Sainte-Agathe3, Merel A Post4
1AP-HP, Biochimie métabolique et Cellulaire, Hôpital Bichat, Paris, France.
Journal of inherited metabolic disease
|October 24, 2025
概括
ATP6AP2拼接变体会导致神经障碍和异常的糖化. 这项研究将这些情况联系起来,表明糖化缺陷是ATP6AP2相关疾病的关键,来自拼接错误.
科学领域:
- 遗传学 是一个遗传学.
- 生物化学 生物化学
- 神经科学是一个神经科学.
背景情况:
- ATP6AP2基因变异与不同的神经和肝脏疾病有关.
- 拼接变体会导致X关联智力障碍 (XPDS) 和帕金森症 (MRXSH),而误解变体会导致N-/O-糖化缺陷 (ATP6AP2-CDG).
- 与ATP6AP2相关的疾病的神经和肝脏表现之间的关系尚不清楚.
研究的目的:
- 在患有ATP6AP2拼接变体和神经症状的患者中研究糖基化生物标志物.
- 为了确定糖化异常是否是ATP6AP2相关神经系统疾病的常见特征.
- 探索糖化在ATP6AP2拼接变异相关疾病的发病过程中的作用.
主要方法:
- 确定了患有ATP6AP2拼接变体和神经疾病的患者.
- 分析了来自患者衍生的纤维细胞的RNA-Seq数据,以确认缺陷拼接.
- 在患者纤维细胞中评估ATP6AP2蛋白水平和糖化状态.
主要成果:
- 四名患者 (三名男性,一名女性) 患有ATP6AP2拼接变体,出现智力障碍,,低血压,神经病变和小头症.
- RNA-Seq证实了缺陷拼接,并降低了患者纤维细胞中的ATP6AP2蛋白水平.
- 在患有ATP6AP2拼接变异的患者中检测到异常的糖化酶化生物标志物.
- 异卵性雌性表现出较温和的表型,这表明基因对剂量敏感.
结论:
- 缺陷的糖化与ATP6AP2拼接变体有关,将XPDS/MRXSH和ATP6AP2-CDG表型联系起来.
- 异常的糖化可能是由拼接缺陷引起的ATP6AP2相关疾病的一致性病理机制.
- 神经发育对ATP6AP2基因剂量高度敏感,这解释了孤立的神经现象型.
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