[Haplotype Analysis of Oculopharyngeal Muscular Dystrophy (OPMD) Locus in Yakutia].
Oculopharyngeal muscular dystrophy (OPMD) is a hereditary neuromuscular disease with autosomal dominant and rarely with autosomal recessive inheritance types. This study included 50 patients with a clinical diagnosis of OPMD, 23 asymptomatic carriers of the mutation from 45 unrelated families, and 56 healthy relatives, as well as population samples of four ethnic groups of Yakutia: Yakuts, Evens, Evenks, Yukaghirs. It was found that the cause of OPMD development in all investigated families is the same increase in.GCN repeats to 14 copies in the PABPN1 gene. The molecular structure ofthe (GCN)₁₄ mutant allele is (GCG)₁₀(GCA)₃GCG. The genetic variability of ten SNPs at the OPMD locus was studied in patient families and population samples. The haplotypes of OPMD were determined by a segregation analysis technique using the EM algorithm in the groups of patients, mutation carriers, and population samples. Only one haplotype of four SNPs (ATCG) linked with the (GCN)₁₄ mutant allele was found in Yakuts and Russian patients and OPMD mutation carriers. Probably, this indicates the accumulation of mutations as a result of the founder effect.
A V
AV
Marusin
Kh A
KhA
Kurtanov
N R
NR
Maksimova
M G
MG
Svarovskaya
V A
VA
Stepanov
D000483:Alleles; D018703:Founder Effect; D006239:Haplotypes; D006801:Humans; D004930:Inuit / Q000235:genetics; D039122:Poly(A)-Binding Protein I / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D012800:Siberia
C576588:PABPN1 protein, human; D039122:Poly(A)-Binding Protein I