Major beta-globin gene mutations in eastern India and their associated haplotypes.
324 alleles of the beta-globin gene from unrelated thalassaemia patients native to the eastern region of India (mainly from the state of West Bengal) were analysed for beta-globin gene mutations by the amplification refractory mutation system (ARMS). The major mutations that were detected are IVS-1 pos 5 (G-C), codon 26 (G-A) and codon 30 (G-C) with frequencies of 0.45, 0.33 and 0.05, respectively. Haplotype analysis revealed a very strong linkage disequilibrium of IVS-1 pos 5 (G-C) with one particular haplotype. HbE was found to be associated with two major haplotypes. Codon 30 (G-C) was associated with a haplotype that is the same as that found in the African population. Haplotype associated with codon 8/9 (+G) was the same as that found in northwest India. These findings have implications for the use of molecular diagnosis for genetic counselling and prenatal diagnosis of beta-thalassaemia in this region.
Bandyopadhyay
A
A
Department of Biophysics, Molecular Biology and Genetics, School of Tropical Medicine, Calcutta, India.
Bandyopadhyay
S
S
Chowdhury
M D
MD
Dasgupta
U B
UB
D004252:DNA Mutational Analysis; D005914:Globins / Q000235:genetics*; D006239:Haplotypes / Q000235:genetics*; D006801:Humans; D007194:India; D009154:Mutation; D012150:Polymorphism, Restriction Fragment Length; D017086:beta-Thalassemia / Q000235:genetics*
D005914:Globins