TY - JOUR
T1 - Factor VIII gene polymorphisms in North Indian population
T2 - A consensus algorithm for carrier analysis of hemophilia A
AU - Srinivasan, Akhila
AU - Mukhopadhyay, Saikat
AU - Karim, Zubair Ahmad
AU - Gupta, Ram Krishna
AU - Gupta, Abhinav
AU - Wadhawan, Vinita
AU - Shukla, Jyoti
AU - Singh, Vijay Pratap
AU - Dash, Debabrata
N1 - Funding Information:
This work was supported in part by grants received by V.P. Singh and D. Dash from the University Grants Commission, India. The donation of equipments from Alexander von Humboldt-Stiftung, Germany, is gratefully acknowledged. The authors wish to thank Drs. Dipika Mohanty, Shrimati Shetty and Madhulika Kabra for their valuable help and suggestions.
PY - 2002/11
Y1 - 2002/11
N2 - Background: Hemophilia A, an X-linked recessive disorder, has the prevalence of 1 male per 7000 of the male population in the Northern states of India. The aim of the present study was to analyze the polymorphisms of the factor VIII gene in a sample population comprised of 22 families (112 persons) in order to formulate an algorithm that would be informative and accurate, yet cost-effective for carrier diagnosis. Methods: Polymerase chain reaction was used to study the polymorphisms of two intragenic restriction fragment length polymorphic sites (recognized by BclI and HindIII) and an extragenic variable number tandem repeat (VNTR) locus (St14). Results: Fifty-eight percent of the women tested were heterozygous for the BclI restriction fragment length polymorphism (RFLP) (significantly high compared to earlier reports), signifying the usefulness of this marker in carrier detection. About 64% of the families from the target population could be diagnosed using this marker alone. The other intragenic HindIII RFLP site showed a heterozygosity rate of 43% in women, and was effective in diagnosing 50% of the families studied. The population prevalence for '+' alleles of BclI and HindIII were 68% and 33%, respectively. About 88% of the women tested were heterozygous for the St14 locus, and 83% of the families could be diagnosed using this marker alone. The 1390- and 1300-bp alleles were most prevalent, while novel polymorphisms of 1500 and 1345 bp were detected. Conclusions: Based on the above data, we suggest screening hemophilic families first for BclI polymorphism, followed by an analysis for HindIII polymorphism in case of homozygosity at the BclI site. When both were noninformative, analysis of St14 locus would be necessary.
AB - Background: Hemophilia A, an X-linked recessive disorder, has the prevalence of 1 male per 7000 of the male population in the Northern states of India. The aim of the present study was to analyze the polymorphisms of the factor VIII gene in a sample population comprised of 22 families (112 persons) in order to formulate an algorithm that would be informative and accurate, yet cost-effective for carrier diagnosis. Methods: Polymerase chain reaction was used to study the polymorphisms of two intragenic restriction fragment length polymorphic sites (recognized by BclI and HindIII) and an extragenic variable number tandem repeat (VNTR) locus (St14). Results: Fifty-eight percent of the women tested were heterozygous for the BclI restriction fragment length polymorphism (RFLP) (significantly high compared to earlier reports), signifying the usefulness of this marker in carrier detection. About 64% of the families from the target population could be diagnosed using this marker alone. The other intragenic HindIII RFLP site showed a heterozygosity rate of 43% in women, and was effective in diagnosing 50% of the families studied. The population prevalence for '+' alleles of BclI and HindIII were 68% and 33%, respectively. About 88% of the women tested were heterozygous for the St14 locus, and 83% of the families could be diagnosed using this marker alone. The 1390- and 1300-bp alleles were most prevalent, while novel polymorphisms of 1500 and 1345 bp were detected. Conclusions: Based on the above data, we suggest screening hemophilic families first for BclI polymorphism, followed by an analysis for HindIII polymorphism in case of homozygosity at the BclI site. When both were noninformative, analysis of St14 locus would be necessary.
KW - Factor VIII
KW - Genetic diseases
KW - Hemophilia
KW - Polymerase chain reaction
KW - RFLP
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U2 - 10.1016/S0009-8981(02)00290-5
DO - 10.1016/S0009-8981(02)00290-5
M3 - Article
C2 - 12367784
AN - SCOPUS:0036844478
SN - 0009-8981
VL - 325
SP - 177
EP - 181
JO - Clinica Chimica Acta
JF - Clinica Chimica Acta
IS - 1-2
ER -