罗马人群中普遍存在的MOCS2变异与一种新的轻度形式的辅因子缺乏症有关
Sung Kweon Cho1,2, Guenter Schwarz3, Velibor Tasic4
1Department of Pharmacology, Ajou University School of Medicine, 164, World Cup-Ro, Yeongtong-Gu, Suwon, South Korea.
European journal of pediatrics
|July 24, 2025
概括
桑提努里亚型III是一种罕见的遗传性疾病,由辅因子缺乏症 (MoCD) 引起. 在罗姆人患者中发现的一种新型MOCS2变异,rs776441627,导致轻度的MoCD表型,具有完全透的生化异常.
科学领域:
- 遗传学和人类疾病
- 代谢障碍 代谢障碍 代谢障碍
- 分子生物学分子生物学
背景情况:
- 桑提努里亚型III是由于MOCS1,MOCS2,MOCS3或GEPH基因的病原变异导致的辅因子缺乏症 (MoCD) 的结果.
- 经典的MoCD通常在婴儿期早期出现严重的神经复杂症.
- 以前的MOCS2相关的MOCD报告主要涉及新生儿诊断的严重症状.
研究的目的:
- 为了调查罗姆人的xanthinuria的遗传基础患者与非典型的表现.
- 描述一种新的MOCS2变体及其在辅因子缺乏症中的功能后果.
- 评估与这种特定的MOCS2变异相关的临床和生化表型.
主要方法:
- 整体外基因组测序在5名患有高血糖和黄素尿的罗姆人患者身上进行.
- 进行了候选变异分离分析和MPT合成和蛋白质复合体形成的功能研究.
- 生物标志物分析,包括硫酸盐和相关代谢物,用于确认MoCD.
主要成果:
- 一种新型的超罕见MOCS2变种rs776441627在四个家庭的五名罗姆人患者中被发现.
- 这种变种影响了两个重叠的读取框架,在所有受影响的个体中与疾病分离.
- 功能性研究表明MPT合成活性显著下降,证实rs776441627是导致MoCD的功能变体.
- 这种变异在罗姆人人口对照组中显示出高等位基因频率 (3.6%).
结论:
- 在MOCS2中rs776441627变异导致辅因子缺乏,具有轻度至无症状的临床表型,但具有完全透的生化表型.
- 低血压是MoCD的关键指标,应在儿童和成人患者神经症状的差异诊断中考虑.
- 建议对MOCS2基因进行基因分析,以选香尿症,特别是在患有这种变种更高患病率的人群中.
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