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Am J Hum Genet. 2012 Jul 13;91(1):163-70. doi: 10.1016/j.ajhg.2012.05.010. Epub 2012 Jun 14.

Familial pityriasis rubra pilaris is caused by mutations in CARD14.

Author information

1
Department of Dermatology, Tel Aviv Sourasky Medical Center, Israel.

Abstract

Pityriasis rubra pilaris (PRP) is a papulosquamous disorder phenotypically related to psoriasis. The disease has been occasionally shown to be inherited in an autosomal-dominant fashion. To identify the genetic cause of familial PRP, we ascertained four unrelated families affected by autosomal-dominant PRP. We initially mapped PRP to 17q25.3, a region overlapping with psoriasis susceptibility locus 2 (PSORS2 [MIM 602723]). Using a combination of linkage analysis followed by targeted whole-exome sequencing and candidate-gene screening, we identified three different heterozygous mutations in CARD14, which encodes caspase recruitment domain family, member 14. CARD14 was found to be specifically expressed in the skin. CARD14 is a known activator of nuclear factor kappa B signaling, which has been implicated in inflammatory disorders. Accordingly, CARD14 levels were increased, and p65 was found to be activated in the skin of PRP-affected individuals. The present data demonstrate that autosomal-dominant PRP is allelic to familial psoriasis, which was recently shown to also be caused by mutations in CARD14.

PMID:
22703878
PMCID:
PMC3397268
DOI:
10.1016/j.ajhg.2012.05.010
[Indexed for MEDLINE]
Free PMC Article

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