在巴西患有MPS类症状的患者中诊断出α-mannosidosis
Maryana Marins1, Marco Antonio Curiati2, Caio Perez Gomes1
1Center for Research and Diagnosis of Genetic Diseases - Department of Biophysics, Universidade Federal de São Paulo, São Paulo, Brazil.
Orphanet journal of rare diseases
|November 27, 2024
概括
一种罕见的代谢障碍,阿尔法-曼诺沙克里多症,由于其与粘多糖糖症 (MPS) 的相似性,经常被误诊. 这项研究在怀疑MPS的个体中发现了低诊断的α-mannosidosis病例,突出了综合诊断方法的必要性.
科学领域:
- 生物化学 生物化学
- 遗传学 遗传学 是一个
- 罕见疾病 罕见疾病
背景情况:
- 阿尔法曼诺西多症是一种由阿尔法曼诺西达酶缺乏引起的自体逆向代谢障碍.
- 临床表现是多系统的,类似于粘多糖症 (MPS).
- 由于与MPS的表型重叠,怀疑存在低诊断.
研究的目的:
- 在怀疑MPS和不确定的诊断的患者中调查alpha-mannosidosis.
- 为了建立生物化学和分子诊断方法对阿尔法-曼诺西多斯.
- 为巴西阿尔法-曼诺西多症的遗传特征作出贡献.
主要方法:
- 选了250名疑似MPS患者的α-曼诺酶活性.
- 使用桑格测序对53名患者的MAN2B1基因进行了测序.
- 为研究进行标准化生化和分子分析.
主要成果:
- 在53个样本中检测到α-曼诺酶缺乏.
- 确认有三个家庭患有阿尔法-曼诺症.
- 鉴定了MAN2B1基因中的无意义变异p.Ser899Ter,导致非功能性蛋白质.
结论:
- 在MPS类表型的个体中,α-mannosidosis可能被低诊断.
- 建议与MPS查一起进行阿尔法曼诺症的联合测试.
- 强调在特定人群中罕见疾病的遗传特征的重要性.
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