Association of psoriasis to PGLYRP and SPRR genes at PSORS4 locus on 1q shows heterogeneity between Finnish, Swedish and Irish families.

• A susceptibility locus for psoriasis, PSORS4, has been mapped to chromosome 1q21 in the region of the epidermal differentiation complex. The region has been refined to a 115 kb interval around the loricrin (LOR) gene. However, no evidence of association between polymorphisms in the LOR gene and psoriasis has been found. Therefore, we have analysed association to three candidate gene clusters of the region, the S100, small proline-rich protein (SPRR) and PGLYRP (peptidoglycan recognition protein) genes, which all contain functionally interesting psoriasis candidate genes. In previous studies, the SPRR and S100 genes have shown altered expression in psoriasis. Also polymorphisms in the PGLYRP genes have shown to be associated with psoriasis. We genotyped altogether 29 single nucleotide polymorphisms (SNPs) in 255 Finnish psoriasis families and analysed association with psoriasis using transmission disequilibrium test. A five-SNP haplotype of PGLYRP SNPs associated significantly with psoriasis. There was also suggestive evidence of association to SPRR gene locus in Finnish families. To confirm the putative associations, selected SNPs were genotyped also in a family collection of Swedish and Irish patients. The families supported association to the two gene regions, but there was also evidence of allelic heterogeneity.

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Dermatologi och venereologi (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Dermatology and Venereal Diseases (hsv//eng)

Keyword

Adolescent

Adult

Aged

Carrier Proteins

genetics

Child

Child

Preschool

Chromosomes

Human

Pair 1

genetics

Cornified Envelope Proline-Rich Proteins

genetics

Female

Finland

Genetic Heterogeneity

Genetic Predisposition to Disease

genetics

Genotype

Haplotypes

genetics

Humans

Infant

Ireland

Male

Middle Aged

Polymorphism

Single Nucleotide

genetics

Psoriasis

ethnology

genetics

Sweden

Young Adult

Publication and Content Type

ref (subject category)

art (subject category)