BACKGROUND: Germline missense mutations in the GJB2 gene that encodes connexin-26 (Cx26) have recently been found to be the cause of the keratitis-ichthyosis-deafness (KID) syndrome. OBJECTIVES: To define the GJB2 mutations in three Japanese patients with KID syndrome. METHODS: Genomic DNA was extracted from peripheral blood and used to amplify the GJB2 gene. Direct sequencing and endonuclease digestion were used for mutation analysis and DNA-based diagnosis. RESULTS: We identified two heterozygous mis-sense mutations (D50Y, D50N) in the GJB2 gene in three Japanese patients with KID syndrome. All mutations were located on the first extracellular domain of Cx26. CONCLUSIONS: These data expand the GJB2 mutation database and show that a dominant mutation of Cx26 can cause KID syndrome in Japanese patients.
BACKGROUND: Germline missense mutations in the GJB2 gene that encodes connexin-26 (Cx26) have recently been found to be the cause of the keratitis-ichthyosis-deafness (KID) syndrome. OBJECTIVES: To define the GJB2 mutations in three Japanese patients with KID syndrome. METHODS: Genomic DNA was extracted from peripheral blood and used to amplify the GJB2 gene. Direct sequencing and endonuclease digestion were used for mutation analysis and DNA-based diagnosis. RESULTS: We identified two heterozygous mis-sense mutations (D50Y, D50N) in the GJB2 gene in three Japanese patients with KID syndrome. All mutations were located on the first extracellular domain of Cx26. CONCLUSIONS: These data expand the GJB2 mutation database and show that a dominant mutation of Cx26 can cause KID syndrome in Japanese patients.
Authors: Niloofar Bazazzadegan; Abraham M Sheffield; Masoomeh Sobhani; Kimia Kahrizi; Nicole C Meyer; Guy Van Camp; Nele Hilgert; Seyedeh Sedigheh Abedini; Farkhondeh Habibi; Ahmad Daneshi; Carla Nishimura; Matthew R Avenarius; Mohammad Farhadi; Richard J H Smith; Hossein Najmabadi Journal: Am J Med Genet A Date: 2011-04-11 Impact factor: 2.802
Authors: Helmuth A Sánchez; Gülistan Mese; Miduturu Srinivas; Thomas W White; Vytas K Verselis Journal: J Gen Physiol Date: 2010-07 Impact factor: 4.086
Authors: Anna Kutkowska-Kaźmierczak; Katarzyna Niepokój; Katarzyna Wertheim-Tysarowska; Aleksandra Giza; Maria Mordasewicz-Goliszewska; Jerzy Bal; Ewa Obersztyn Journal: J Appl Genet Date: 2015-01-10 Impact factor: 3.240