title: Mutation and haplotype analysis of oculopharyngeal muscular dystrophy in Thai patients.
abstract: Oculopharyngeal muscular dystrophy (OPMD) is an inherited neuromuscular disease associated with a short trinucleotide repeat expansion in Exon 1 of the PABPN1 gene. OPMD is uncommon in East Asian populations, and there have been no previous reports of Thai patients. We studied clinical and molecular genetic features of six unrelated Thai patients with autosomal dominant OPMD. All patients had expansions of the guanine-cytosine-guanine (GCG) repeat ranging from three to seven additional repeats in the PABPN1 gene. Haplotype analysis showed that these mutations might have originated independently. Analysis of the size of the GCG repeat in the PABPN1 gene in 200 Thai control patients showed that 0.5% of the control subjects possessed (GCG)(7), thereby suggesting that the prevalence of autosomal recessive OPMD in the Thai population was approximately 1 in 160,000. In conclusion, our data suggest that OPMD in Thailand may be more common than previously thought.
authors.affiliation: Division of Neurology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, 270 Rama VI Road, Bangkok 10400, Thailand. ratpk@mahidol.ac.th
authors.forename: T
authors.initials: T
authors.lastname: Pulkes
authors.forename: C
authors.initials: C
authors.lastname: Papsing
authors.forename: M
authors.initials: M
authors.lastname: Busabaratana
authors.forename: C
authors.initials: C
authors.lastname: Dejthevaporn
authors.forename: R
authors.initials: R
authors.lastname: Witoonpanich
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics; D005260:Female; D006239:Haplotypes; D006801:Humans; D008297:Male; D008875:Middle Aged; D039141:Muscular Dystrophy, Oculopharyngeal / Q000235:genetics*; D009154:Mutation; D039103:Poly(A)-Binding Protein II / Q000235:genetics*; D013785:Thailand; D019680:Trinucleotide Repeat Expansion / Q000235:genetics*
chemical_list: D039103:Poly(A)-Binding Protein II