25.    Novel compound heterozygous nonsense mutations in the hairless gene causing atrichia with papular lesions.
Ghalia Ashoor(1), Robert Greenstein (2), HaMut Lam(3), Amalia Martinez-Mir(3), Abraham Zlotogorski(4), Angela Christiano(5). 1.St John's Institute of Dermatology, The Guy's, King's College and St Thomas Medical School, London, UK, 2.Division of Human Genetics, University of Connecticut Health Center, Connecticut, USA, 3.Department of Dermatology, Columbia University, College of Physicians and Surgeons, New York, USA,  4.Department of Dermatology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel,  5.Department of Genetics and Development, Columbia University, College of Physicians and Surgeons, New York, USA.

BACKGROUND: Atrichia with papular lesions (APL) is a rare autosomal recessive condition resulting from mutations in the hairless (HR) gene. OBJECTIVE: In the present study, we investigated the molecular basis of APL in a non-consanguineous Korean family. METHODS: Direct automated DNA sequencing of the HR gene and restriction digestion analysis were used to identify and confirm the mutation in our proband. RESULTS: Sequencing of the HR gene revealed two novel nonsense mutations in exons 2 and 4 which were subsequently confirmed via enzymatic restriction. No mutations have previously been detected in this population. CONCLUSION: The growing number of heterozygous mutations in non-consanguineous pedigrees supports the hypothesis that APL is more common than previously expected.