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Genetic variants of the IL22 promoter associate to onset of psoriasis before puberty and increased IL-22 production in T cells.
Karolinska Institutet, Karolinska University Hospital, Stockholm.
Karolinska Institutet, Karolinska University Hospital, Stockholm.
Karolinska Institutet, Karolinska University Hospital, Stockholm.
Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för inflammationsmedicin. Linköpings universitet, Hälsouniversitetet. Östergötlands Läns Landsting, Hjärt- och Medicincentrum, Hudkliniken i Östergötland.
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2014 (Engelska)Ingår i: Journal of Investigative Dermatology, ISSN 0022-202X, E-ISSN 1523-1747, Vol. 134, nr 6, s. 1535-1541Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Most psoriasis susceptibility genes were identified in cohorts of mixed clinical phenotypes and the exploration of genes in clinical subtypes is scarce. IL-22 has an established role in host defense and in psoriasis skin pathology, reflecting the delicate balance between control of infection and immunopathology. In a case-control study, we compared the genetic association to IL22 in psoriasis onset in patients between 0-9 (n=207), 10-20 (n=394), and 21-40 (n=468) years with healthy controls (n=1,529). Logistic regression analysis revealed association to regulatory elements in the IL22 promoter confined to onset of psoriasis before puberty (odds ratio=1.45, P<0.0007). The associated variants contain putative binding sites for AhR, a potent inducer of IL-22 expression. In a luciferase assay, transcriptional activity of a high-risk gene variant resulted in 80% higher promoter activity (P=0.012) compared with a low-risk variant. Ex vivo stimulated T cells from peripheral blood were analyzed with flow cytometry. Children with psoriasis carrying a high-risk variant produced 1.7 times more IL-22 compared with low-risk variants (P=0.042). Our combined genetic and functional data support the notion that a genetic IL22 variant that promotes epithelial barrier defense is preferentially enriched in and may precipitate the onset of psoriasis at an early age.

Ort, förlag, år, upplaga, sidor
2014. Vol. 134, nr 6, s. 1535-1541
Nationell ämneskategori
Dermatologi och venereologi
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URN: urn:nbn:se:liu:diva-107739DOI: 10.1038/jid.2014.5ISI: 000336193700011PubMedID: 24390134OAI: oai:DiVA.org:liu-107739DiVA, id: diva2:727128
Tillgänglig från: 2014-06-19 Skapad: 2014-06-19 Senast uppdaterad: 2017-12-05

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