Pedigree analysis of vitiligo: Further support for multilocus involvement |
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Authors: | Swapan K. Nath James J. Nordlund Partha P. Majumder |
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Affiliation: | 1. Anthropometry and Human Genetics Unit, Indian Statistical Institute, 203 B.T. Road, 700 035, Calcutta, India 2. Department of Dermatology, University of Cincinnati Medical Center, 45267, Cincinnati, OH, USA
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Abstract: | Vitiligo is a dermatological disorder in man that shows familial aggregation. We performed segregation analysis on data pertaining to vitiligo on members of 147 pedigrees each ascertained through a single proband, and tested various non-genetic, and one-locus and two-locus genetic models. Non-genetic and one-locus genetic models were rejected in favour of a two-locus model postulating epistatic interaction of recessive alleles in the aetiology of vitiligo. The present results show that vitiligo is not a single-locus disorder and substantiate our earlier inference, drawn on the basis of nuclear-family data, of multilocus involvement in the pathogenesis of vitiligo. |
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