临床荟萃 ›› 2022, Vol. 37 ›› Issue (2): 145-149.doi: 10.3969/j.issn.1004-583X.2022.02.010

• 论著 • 上一篇    下一篇

甲基丙二酸血症的临床表型及基因特征分析

赵婉晴, 张亚男, 魏晨曦, 白欣立()   

  1. 河北医科大学第二医院 儿科,河北 石家庄 050000
  • 收稿日期:2021-08-19 出版日期:2022-02-20 发布日期:2022-03-04
  • 通讯作者: 白欣立 E-mail:sindywhite@163.com
  • 基金资助:
    河北省医学科学研究课题计划——甲钴胺治疗甲基丙二酸血症合并同型半胱氨酸血症(20190599)

Methylmalonic acidemia: clinical phenotype and genetic characteristics

Zhao Wanqing, Zhang Yanan, Wei Chenxi, Bai Xinli()   

  1. Department of Pediatrics, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
  • Received:2021-08-19 Online:2022-02-20 Published:2022-03-04
  • Contact: Bai Xinli E-mail:sindywhite@163.com

摘要:

目的 探讨mut型甲基丙二酸血症(methylmalonic acidemia, MMA)的临床特点、实验室检查及基因型,为mut型MMA的诊断与治疗提供依据。方法 回顾性分析2015年12月至2020年6月于河北医科大学第二医院儿科内分泌遗传代谢诊室诊治的18例mut型 MMA 患儿的临床表现、一般检查、血尿代谢、基因检测结果。结果 mut型MMA患儿多于1岁内发病,主要临床表现为呕吐、嗜睡,严重者甚至出现抽搐、呼吸困难、意识障碍。18例患儿均为甲基丙二酰辅酶A变位酶基因(methylmalonyl-CoA mutase gene, MUT)基因突变,共检测出20种突变,突变位点主要是c.729_730insTT,且突变类型多样化。结论 mut型MMA临床表现不典型,血尿代谢可供参考,基因检测是临床分型的可靠依据,且基因突变位点多样化。

关键词: 甲基丙二酸血症, MUT基因, mut型

Abstract:

Objective To explore the clinical characteristics, laboratory examination and genotype of mut-type methylmalonic acidemia (MMA) to provide basis for the diagnosis and treatment of mut-type MMA.Methods A retrospective analysis of clinical manifestation, general examination, serum and urine metabolism, gene detection results of 18 children with mut-type MMA admitted to the pediatric endocrinology, genetics and metabolism clinic of the Second Hospital of Hebei Medical University from December 2015 to June 2020 was performed.Results Mut-type MMA were common in less than 1 year infant, in those patients, main clinical manifestations presented vomiting, drowsiness, even convulsions, dyspnea and disturbance of consciousness in severe. Gene mutation of 18 children was caused by methylmalonyl-CoA mutase (MUT), detecting totally 20 mutations; the mutation sites were mainly c.729_730insTT, and with diversification of mutation types.Conclusion Mut-type MMA, a atypical clinical manifestations, should be reference urine metabolism, genetic testing is considered to be a reliable evidence for clinical classification with diversification of mutation types.

Key words: methylmalonic acidemia, MUT gene, mut type

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