GJB1 Gene Analysis in Two Extended Families with X-Linked Charcot-Marie-Tooth Disease

• Main Authors: Sabine Kovale, Ruta Terauda, Elina Millere, Gita Taurina, Daiga Murmane, Jekaterina Isakova, Viktorija Kenina, Linda Gailite
• Format: Article
• Language: English
• Published: Karger Publishers 2021-06-01
• Series: Case Reports in Neurology
• Subjects: gjb1; x-linked charcot-marie-tooth disease; charcot-marie-tooth disease
• Online Access: https://www.karger.com/Article/FullText/515170
• ISSN: 1662-680X

X-linked Charcot-Marie-Tooth (CMT) disease type I (CMTX1) is the second most frequent type of CMT disease caused by pathogenic variants in the GJB1 gene. We described 2 extended cases (families) with CMTX1 with identified pathogenic variants – p.Val139Met and p.Arg215Trp. In both the families, neurological symptoms started earlier in male than in female patients. In some family members, molecular diagnostics was performed prior to neurological investigation due to family cascade screening. There was variable neurological phenotype representing CMT. Conclusions: There is a large clinical heterogeneity in CMTX, even amongst the family members.