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Title: Refinement of a locus for Marie Unna hereditary hypotrichosis to a 1.1-cM interval at 8p21.3. Author: He PP, Zhang XJ, Yang Q, Li M, Liang YH, Yang S, Yan KL, Cui Y, Shen YY, Wang HY, Sun LD, Du WH, Shen YJ, Xu SJ, Huang W. Journal: Br J Dermatol; 2004 May; 150(5):837-42. PubMed ID: 15149494. Abstract: BACKGROUND: Marie Unna hereditary hypotrichosis (MUHH) is a rare autosomal congenital alopecia with progressive hair loss starting in early childhood and accelerating at puberty. A locus for MUHH has been mapped on chromosome 8p21 but no genes for MUHH have been identified to date. OBJECTIVES: To refine the MUHH locus to a narrow chromosome region to facilitate cloning of the gene. METHODS: We performed genotyping and linkage analysis in a multigeneration Chinese family with MUHH, using 18 high-density microsatellite markers spanning the previously mapped interval at 8p21. RESULTS: Significant evidence for linkage was observed in this region, with a maximum two-point LOD score of 3.01 (theta = 0). Haplotype analysis localized the MUHH locus within the region defined by D8S282 and D8S1839. This region overlaps by 1.1-cM with the previously reported MUHH region and represents a physical distance of about 380 kb. CONCLUSIONS: This study provides a refined map location (1.1 cM) for isolation of the gene causing MUHH. These data also indicate the existence of a common MUHH locus at 8p21.3 between affected caucasian and Chinese families.[Abstract] [Full Text] [Related] [New Search]