Four Turkish families with hyperekplexia: A missense mutation and the exon 1–7 deletion in the GLRA1 gene

Creative Commons License

Tezen D., Şimşir G., Çokar Ö., Demirbilek V., Başak A. N., Yapıcı Z.

Parkinsonism and Related Disorders, vol.105, pp.128-131, 2022 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 105
  • Publication Date: 2022
  • Doi Number: 10.1016/j.parkreldis.2022.11.011
  • Journal Name: Parkinsonism and Related Disorders
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, CINAHL, EMBASE, MEDLINE, Psycinfo
  • Page Numbers: pp.128-131
  • Keywords: Genetic counseling, GLRA1, Hyperekplexia, Turkish mutations
  • Open Archive Collection: AVESIS Open Access Collection
  • Istanbul University Affiliated: Yes

Abstract

© 2022 Elsevier LtdBackground: Hyperekplexia is a disease that progresses with excessive startle attacks and is included in the differential diagnosis of epilepsy and many movement disorders. Methods: The WES results were validated in available family members by Sanger sequencing, or in the case of deletion, PCR followed by agarose gel electrophoresis was performed. Results: WES analysis revealed the previously reported homozygous c.277C>T p.Arg93Trp variant in the GLRA1 gene (ENST00000455880.2) in Family 1. In all other three families, the previously reported homozygous deletion of exons 1–7 of the GLRA1 gene was identified using CNV analysis based on the WES data. Conclusions: The homozygous exon1-7 deletion has been described several times in different populations and may be a founder mutation in the Kurdish people in Turkey. The family with Arg93Trp variant stems from the Black Sea region of Turkey where close consanguinity is common. These analyses are important to provide genetic counseling to families and for a better understanding of the pathophysiology of the disease.