OBJECTIVES: To understand the population variation and haplotypes of Huntington's disease (HD) in India we have analysed CAG repeats at the HD locus together with closely linked polymorphisms in both HD patients and normal controls. MATERIALS AND METHODS: The CAG repeat and linked polymorphisms were analysed in 30 Indian HD families together with 250 ethnically matched controls using fluorescent polymerase chain reaction (PCR) based size estimation. RESULTS: CAG repeats at the HD locus in the normal population showed a mean size of 17.99 +/- 2.66 repeats (range nine to 33 repeats). The HD mutation in our families did not show any significant association with either the (CCG)7 or (CCG)10 allele while haplotype analysis suggested the over-representation of the 7-2-I (CCG-D4s127-Delta 2642 loci) haplotype in a subset of families. CONCLUSION: The distribution of CAG repeats in the normal population suggests a higher prevalence of HD, closer to that seen in Western Europe. Haplotype analysis suggests the presence of a founder mutation in a subset of families and provides evidence for multiple and geographically distinct origins for the HD mutation in India.
OBJECTIVES: To understand the population variation and haplotypes of Huntington's disease (HD) in India we have analysed CAG repeats at the HD locus together with closely linked polymorphisms in both HDpatients and normal controls. MATERIALS AND METHODS: The CAG repeat and linked polymorphisms were analysed in 30 Indian HD families together with 250 ethnically matched controls using fluorescent polymerase chain reaction (PCR) based size estimation. RESULTS: CAG repeats at the HD locus in the normal population showed a mean size of 17.99 +/- 2.66 repeats (range nine to 33 repeats). The HD mutation in our families did not show any significant association with either the (CCG)7 or (CCG)10 allele while haplotype analysis suggested the over-representation of the 7-2-I (CCG-D4s127-Delta 2642 loci) haplotype in a subset of families. CONCLUSION: The distribution of CAG repeats in the normal population suggests a higher prevalence of HD, closer to that seen in Western Europe. Haplotype analysis suggests the presence of a founder mutation in a subset of families and provides evidence for multiple and geographically distinct origins for the HD mutation in India.
Authors: Chris Kay; Jennifer A Collins; Nicholas S Caron; Luciana de Andrade Agostinho; Hailey Findlay-Black; Lorenzo Casal; Dulika Sumathipala; Vajira H W Dissanayake; Mario Cornejo-Olivas; Fiona Baine; Amanda Krause; Jacquie L Greenberg; Carmen Lúcia Antão Paiva; Ferdinando Squitieri; Michael R Hayden Journal: Am J Hum Genet Date: 2019-11-07 Impact factor: 11.025
Authors: Simon C Warby; Henk Visscher; Jennifer A Collins; Crystal N Doty; Catherine Carter; Stefanie L Butland; Anna R Hayden; Ichiro Kanazawa; Colin J Ross; Michael R Hayden Journal: Eur J Hum Genet Date: 2011-01-19 Impact factor: 4.246
Authors: Chris Kay; Jennifer A Collins; Niels H Skotte; Amber L Southwell; Simon C Warby; Nicholas S Caron; Crystal N Doty; Betty Nguyen; Annamaria Griguoli; Colin J Ross; Ferdinando Squitieri; Michael R Hayden Journal: Mol Ther Date: 2015-07-23 Impact factor: 11.454
Authors: Simon C Warby; Alexandre Montpetit; Anna R Hayden; Jeffrey B Carroll; Stefanie L Butland; Henk Visscher; Jennifer A Collins; Alicia Semaka; Thomas J Hudson; Michael R Hayden Journal: Am J Hum Genet Date: 2009-02-26 Impact factor: 11.025
Authors: Raj N Kalaria; Gladys E Maestre; Raul Arizaga; Robert P Friedland; Doug Galasko; Kathleen Hall; José A Luchsinger; Adesola Ogunniyi; Elaine K Perry; Felix Potocnik; Martin Prince; Robert Stewart; Anders Wimo; Zhen-Xin Zhang; Piero Antuono Journal: Lancet Neurol Date: 2008-07-28 Impact factor: 44.182
Authors: Eliana Marisa Ramos; Tammy Gillis; Jayalakshmi S Mysore; Jong-Min Lee; Martin Gögele; Yuri D'Elia; Irene Pichler; Jorge Sequeiros; Peter P Pramstaller; James F Gusella; Marcy E MacDonald; Isabel Alonso Journal: Am J Med Genet B Neuropsychiatr Genet Date: 2015-02-05 Impact factor: 3.568