期刊文献+

MTM1基因变异致X连锁中央核肌病患者2例的临床特征及遗传学分析 被引量:1

Clinical characteristics and genetic analysis of two children with X-linked Centronuclear myopathy due to variants of MTM1 gene
原文传递
导出
摘要 目的探讨2例中央核肌病(CNM)新生儿的临床及遗传学特征。方法选取2019年4月至2021年11月华中科技大学同济医学院附属武汉儿童医院临床诊断的2例中央核肌病新生儿作为研究对象,收集其临床信息。对患儿及其父母进行染色体核型分析和全外显子组测序(WES),对候选变异进行Sanger测序家系验证。依据美国医学遗传学与基因组学学会(ACMG)变异解读标准与指南对候选变异进行致病性评估。结果患儿1为出生0.5 h龄男性,患儿2为20日龄男性,主要表现为呼吸困难及吞咽困难。WES提示2例患儿均存在MTM1基因变异,经Sanger测序验证,患儿1的变异为c.1261A>G,为半合子。根据ACMG相关指南评级为致病性变异(PVS1+PM2_Supporting+PP3)。患儿2的变异位点为c.342delT,为半合子。根据ACMG相关指南,c.787C>T评级为致病性变异(PVS1+PM2_Supporting+PP3)。结论MTM1基因c.1261A>G及c.342delT可能为上述2例CNM患儿的遗传学病因。 Objective To explore the clinical and genetic characteristics of two newborns with Central nuclear myopathy(CNM).Methods Two newborns with CNM diagnosed clinically at Wuhan Children′s Hospital Affiliated to Tongji Medical College,Huazhong University of Science and Technology in April 2019 and November 2021 were selected as the study subjects,and their clinical data was collected.Both newborns and their parents were subjected chromosomal karyotyping analysis and whole exome sequencing(WES).Candidate variants were verified by Sanger sequencing.Pathogenicity of the candidate variants was evaluated based on the guidelines from the American College of Medical Genetics and Genomics(ACMG).Results Patient 1 was a male neonate,and Patient 2 was a 20-day-old male infant.Both newborns had featured difficulty in breathing and swallowing.WES revealed that both had harbored hemizygous variants of the MTM1 gene,which were verified by Sanger sequencing.Patient 1 harbored a c.1261A>G variant.Based on the ACMG guidelines,it was rated as pathogenic(PVS1+PM2_Supporting+PP3).Patient 2 harbored a c.342delT variant,which was also rated as pathogenic(PVS1+PM2_Supporting+PP3).Conclusion The c.1261A>G and c.342delT variants of the MTM1 gene probably underlay the pathogenesis of CNM in the two patients.
作者 王劲 王丹 李婷婷 曾凌空 王石 Wang Jin;Wang Dan;Li Tingting;Zeng Lingkong;Wang Shi(Department of Neonatology,Wuhan Children′s Hospital(Wuhan Maternal and Child Health Care Hospital),Tongji Medical College,Huazhong University of Science and Technology,Wuhan,Hubei 430070,China)
出处 《中华医学遗传学杂志》 CAS CSCD 2024年第7期812-816,共5页 Chinese Journal of Medical Genetics
基金 湖北省儿科联盟医学科研项目(HBPAMR-2021-06)。
关键词 MTM1基因 中央核肌病 遗传学分析 MTM1 gene Central nuclear myopathy Genetic analysis
  • 相关文献

参考文献6

二级参考文献27

  • 1毕学杰,薛春梅,薛平,郭刚,刘玉祯.晚发型肌管肌病1例[J].临床与实验病理学杂志,2006,22(4):510-511. 被引量:2
  • 2刘永红,邓艳春,李力,黄晓峰.成年发病中央核肌病1例报告[J].中华神经外科疾病研究杂志,2007,6(1):85-86. 被引量:1
  • 3Laporte J, Guiraud-Chaumeil C, Vincent MC, et al. Mutations in the MTM1 gene implicated in X-linked myotubular myopathy. Hum Mol Genet, 1997, 6: 1505-1511.
  • 4Bitoun M, Maugenre S, Jeannet PY, et al. Mutations in dynamin 2 cause dominant centronuclear myopathy. Nat Genet, 2005, 37 : 1207-1209.
  • 5Heckmatt JZ, Sewry CA, Hodes D, et al. Congenital centronuclear ( myotubular ) myopathy : a clinical, pathological and genetic study in eight children. Brain, 1985, 108: 941-964.
  • 6Jungbluth H, Sewry CA, Buj-Bello A, et al. Early and severe presentation of X-linked myotubular myopathy in a girl with skewed X-inactivation. Neuromuscul Disord, 2003, 13 : 55-59.
  • 7Kristiansen M, Knudsen GP, Tanner SM, et al. X-inactivation patterns in carriers of X-linked myotubular myopathy. Neuromuscul Disord, 2003, 13 : 468-471.
  • 8Dahl N, Hu LJ, Chery M, et al. Myotubular myopathy in a girl with a deletion at Xq27-q28 and unbalanced Ⅹ inactivation assigns the MTM1 gene to a 600-kb region. Am J Hum Genet , 1995,56 : 1108-1115.
  • 9Wallgren-Pettersson C, Clarke A, Samson F, et al. The myotubular myopathies: differential diagnosis of the Ⅹ linked recessive, autosomal dominant, and autosomal recessive forms and present state of DNA studies. J Med Genet, 1995, 32: 673-679.
  • 10Sarnat HB. Myotubular myopathy: arrest of morphogenesis of myofibres associated with persistence of fetal vimentin and desmin : four cases compared with fetal and neonatal muscle. Can J Neurol Sci, 1990, 17: 109-123.

共引文献13

同被引文献7

引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部