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  • Title: Localization of a novel autosomal recessive hypotrichosis locus (LAH3) to chromosome 13q14.11-q21.32.
    Author: Wali A, Chishti M, Ayub M, Yasinzai M, Kafaitullah, Ali G, John P, Ahmad W.
    Journal: Clin Genet; 2007 Jul; 72(1):23-9. PubMed ID: 17594396.
    Abstract:
    Autosomal recessive hypotrichosis is a rare form of alopecia characterized by sparse hair on scalp, sparse to absent eyebrows and eyelashes, and sparse auxiliary and body hair. Previously, for this form of hypotrichosis, two loci LAH (localized hereditary hypotrichosis) and AH (autosomal recessive hereditary hypotrichosis) have been mapped on chromosome 18q12.1 and 3q27.2, respectively. In the study presented here, we report the localization of a third locus for autosomal recessive form of hypotrichosis in two large Pakistani families. The patients in the two families exhibited typical features of the hereditary hypotrichosis. Genome scan using polymorphic microsatellite markers mapped the gene on chromosome 13q14.11-q21.32. A maximum combined two-point logarithm of odds (LOD) score of 4.79 at theta= 0.0 was obtained for several markers. Multipoint linkage analysis resulted in a maximum LOD score of 5.9, which further supports the linkage. Haplotype analysis defined the linkage interval of 17.35 cM flanked by markers D13S325 and D13S1231 according to the Rutgers combined linkage-physical map. This region contains 24.41 Mb according to the build 36 of the human genome sequence-based physical map.
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