Congenital myasthenic syndrome in Israel: Genetic and clinical characterization

Sharon Aharoni, Menachem Sadeh, Yehuda Shapira, Simon Edvardson, Muhannad Daana, Talia Dor-Wollman, Aviva Mimouni-Bloch, Ayelet Halevy, Rony Cohen, Liora Sagie, Zohar Argov, Malcolm Rabie, Ronen Spiegel, Ilana Chervinsky, Naama Orenstein, Andrew G Engel, Yoram Nevo

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

The objective of the study was to evaluate the epidemiology of patients with congenital myasthenic syndrome (CMS) in Israel. Targeted mutation analysis was performed based on the clinical symptoms and electrophysiological findings for known CMS. Additional specific tests were performed in patients of Iranian and/or Iraqi Jewish origin. All medical records were reviewed and clinical data, genetic mutations and outcomes were recorded. Forty-five patients with genetic mutations in known CMS genes from 35 families were identified. Mutations in RAPSN were identified in 13 kinships in Israel. The most common mutation was c.-38A>G detected in 8 patients of Iranian and/or Iraqi Jewish origin. Four different recessive mutations in COLQ were identified in 11 kinships, 10 of which were of Muslim-Arab descent. Mutations in CHRNE were identified in 7 kinships. Less commonly detected mutations were in CHRND, CHAT, GFPT1 and DOK7. In conclusion, mutations in RAPSN and COLQ are the most common causes of CMS in our cohort. Specific mutations in COLQ, RAPSN, and CHRNE occur in specific ethnic populations and should be taken into account when the diagnosis of a CMS is suspected.

Original languageEnglish (US)
Pages (from-to)136-140
Number of pages5
JournalNeuromuscular Disorders
Volume27
Issue number2
DOIs
StatePublished - Feb 1 2017

Keywords

  • CHRNE
  • COLQ
  • Congenital myasthenic syndrome (CMS)
  • Genetic mutations
  • RAPSN

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Neurology
  • Clinical Neurology
  • Genetics(clinical)

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    Aharoni, S., Sadeh, M., Shapira, Y., Edvardson, S., Daana, M., Dor-Wollman, T., Mimouni-Bloch, A., Halevy, A., Cohen, R., Sagie, L., Argov, Z., Rabie, M., Spiegel, R., Chervinsky, I., Orenstein, N., Engel, A. G., & Nevo, Y. (2017). Congenital myasthenic syndrome in Israel: Genetic and clinical characterization. Neuromuscular Disorders, 27(2), 136-140. https://doi.org/10.1016/j.nmd.2016.11.014