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Τρίτη 20 Φεβρουαρίου 2018

Novel splice site mutation in the LIPH gene in a patient with autosomal recessive woolly hair/hypotrichosis: Case report and published work review

Abstract

Autosomal recessive woolly hair is a relatively rare hereditary hair disorder characterized by sparse, short, curly hair. This condition is known to be caused by mutations in the LIPH gene, LPAR6 gene or KRT25 gene. In the Japanese population, most patients with autosomal recessive woolly hair carry one of two founder mutations in the LIPH gene, c.736T>A (p.Cys246Ser) or c.742C>A (p.His248Asn). However, occasionally, individuals with this condition carry compound heterozygous mutations, typically one founder mutation and another mutation. In this study, we describe a patient with a compound heterozygous mutation in the LIPH gene at c.736T>A and c.1095-3C>G. The latter mutation created a novel splice site. This was the fourth splice site mutation to be described in the LIPH gene. Furthermore, we performed an in vitro transcription assay in cultured cells, and demonstrated that the c.1095-3C>G mutation led to a frame-shift, which created a premature termination codon at the protein level (p.Glu366Ilefs*7). Finally, we summarized the mutations previously reported for the LIPH gene. Our findings provide further clues as to the molecular basis of autosomal recessive woolly hair.



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