Clinical Genetics
Analysis of CLCN1 gene mutations in a family affected with myotonia congenita
Feng Jing, Haijiang Li, Dan Yang, Tao Chen, Yuexian Liu, Lidan Yu
Published 2018-06-10
Cite as Chin J Med Genet, 2018, 35(3): 400-402. DOI: 10.3760/cma.j.issn.1003-9406.2018.03.021
Abstract
ObjectiveTo detect potential mutations of chloride channel l (CLCN1) gene in a family affected with myotonia congenita.
MethodsClinical data of the proband and her parents and brother was collected. The coding regions of the CLCN1 gene were subjected to PCR and Sanger sequencing.
ResultsTwo missense mutations (c.937G>A and c. 1205C>T), which were respectively located within exons 8 and 11 of the CLCN1 gene, were identified in the proband. The mother and father of the proband were found to harbor the c. 937G>A and c. 1205C>T mutation, respectively, whilst neither mutation was found in her brother.
ConclusionThe novel missense CLCN1 mutations probably underlie the disease in this family. These have enriched the spectrum of CLCN1 mutations and may facilitate further research on this disorder.
Key words:
Myotonia congenita; Chloride channel 1; Missense mutation; Compound heterozygous mutation
Contributor Information
Feng Jing
Department of Neurology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, China
Haijiang Li
Dan Yang
Tao Chen
Yuexian Liu
Lidan Yu