The differences in the polymorphic allele frequency distribution patterns of the biallelic (M470V and TUB20) and microsatellite (IVS6aGATT, IVS8CA, and IVS17CA) markers within the CFTR gene between normal and delF508 chromosomes have been established. For most of the marker loci similar distribution of the allele frequencies on normal and mutant chromosomes without delF508 was demonstrated. Certain polymorphic alleles displayed substantial linkage disequilibrium with the delF508 mutation. Analysis of the IVS6aGATT-IVS8CA-M470V-IVS17CA-TUB20 haplotypes association on normal and mutant chromosomes provided identification of the delF508 ancestral haplotype. It was suggested that delF508 mutant chromosomes were introduced into the modern Bashkir gene pool as a result of Slavic migrations from the Eastern Europe. The IVS6aGATT-IVS8CA-M470V-IVS17CA-TUB20major haplotype (77272) revealed was statistically significantly most frequently found on the mutant chromosomes without the delF508 mutation. This finding suggests that the Bashkir cystic fibrosis patients, mostly belonging to the Turkic-speaking families, possessed specific CFTR gene defect associated with the given haplotype.
Russian Journal of Genetics – Springer Journals
Published: Oct 7, 2004
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