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Loss-of-function mutations in HOXC13 cause pure hair and nail ectodermal dysplasia
- Source :
- American journal of human genetics. 91(5)
- Publication Year :
- 2012
-
Abstract
- Pure hair and nail ectodermal dysplasia (PHNED) is a congenital condition characterized by hypotrichosis and nail dystrophy. Autosomal-recessive PHNED has previously been mapped to chromosomal region 12q12-q14.1, which contains the type II hair keratin and HOXC clusters. Hoxc13-null mice are known to develop hair and nail defects very similar to those seen in human PHNED. We performed whole-exome sequencing in a consanguineous Chinese family affected by PHNED and identified a homozygous nonsense mutation (c.390CA [p.Tyr130(∗)]) in HOXC13 in all affected individuals. In an additional affected female from a consanguineous Afghan family, we found a 27.6 kb homozygous microdeletion involving the first exon of HOXC13. We examined HOXC13 expression in scalp specimen obtained from the index individual of the Chinese family and detected dramatically reduced mRNA levels in skin tissue and nearly absent protein staining in hair follicles, suggesting a mechanism of nonsense-mediated mRNA decay. We also observed markedly decreased expression of four HOXC13 target genes in the specimen. Taken together, our results demonstrate that loss-of-function mutations in HOXC13 cause autosomal-recessive PHNED and further highlight the importance of HOXC13 in hair and nail development.
- Subjects :
- Male
Ectodermal dysplasia
China
Nonsense mutation
Genes, Recessive
Mice, Transgenic
Biology
Hypotrichosis
Hair keratin
Exon
Consanguinity
Mice
Nail Diseases
Asian People
Ectodermal Dysplasia
Report
medicine
Genetics
Animals
Humans
Genetics(clinical)
Exome
Genetics (clinical)
Skin
Homeodomain Proteins
integumentary system
Gene Expression Profiling
Homozygote
medicine.disease
Molecular biology
Pedigree
medicine.anatomical_structure
Phenotype
Gene Expression Regulation
Nail disease
Chromosomal region
Nail (anatomy)
Female
Subjects
Details
- ISSN :
- 15376605
- Volume :
- 91
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- American journal of human genetics
- Accession number :
- edsair.doi.dedup.....47df336168f5ffc4139630a7c8d401ae