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dc.contributor.authorKarason, Ari
dc.contributor.authorGudjonsson, Johann E
dc.contributor.authorJonsson, Hjortur H
dc.contributor.authorHauksson, Valdimar B
dc.contributor.authorRunarsdottir, E Hjaltey
dc.contributor.authorStefansson, Kari
dc.contributor.authorValdimarsson, Helgi
dc.contributor.authorGulcher, Jeffrey R
dc.date.accessioned2006-05-19T09:37:07Z
dc.date.available2006-05-19T09:37:07Z
dc.date.issued2005
dc.identifier.citationJ. Invest. Dermatol. 2005, 124(6):1177-85en
dc.identifier.issn0022-202X
dc.identifier.pmid15955092
dc.identifier.doi10.1111/j.0022-202X.2005.23703.x
dc.identifier.otherAAI12en
dc.identifier.urihttp://hdl.handle.net/2336/2857
dc.descriptionTo access publisher full text version of this article. Please click on the hyperlink in Additional Links fielden
dc.description.abstractPsoriasis is a chronic inflammatory skin disease with overlapping subphenotypes. It has a strong complex genetic component, but has been problematic to identifying significant loci. We evaluated 1000 patients with chronic plaque psoriasis and documented several subphenotypes. Here we report results of genome-wide linkage scans for psoriasis genes in 238 Icelandic families with 874 patients. MHC linkage was confirmed with LOD score of 10.9. When the entire cohort was analyzed, two other loci with LOD scores of 2.5 and 1.5 were observed on 16q and 4q, respectively. Stratification into subphenotypes revealed additional loci with LOD scores exceeding or approaching significance. A LOD score of 5.7 appeared on 16q in PsA patients with analysis conditioned on parental inheritance. A LOD score of 3.6 on 4q was detected when disease occurred at or older than 17 y, our median cohort age. This locus was defined by a marker near one reportedly displaying significant linkage in a Chinese psoriasis population and near suggestive linkage in a Caucasian population. A LOD of 3.0 was observed on 10q when disease onset occurred in the scalp. Furthermore, clinical stratification either revealed or increased LOD scores when compared to unstratified analysis and some coincided with previous reports.
dc.language.isoenen
dc.publisherNatureen
dc.relation.urlhttp://www.nature.com/jid/journal/v124/n6/full/5602846a.htmlen
dc.subjectAge of Onseten
dc.subjectArthritis, Psoriaticen
dc.subjectChromosome Mappingen
dc.subjectChromosomes, Human, Pair 16en
dc.subjectChromosomes, Human, Pair 4en
dc.subjectCohort Studiesen
dc.subjectFemaleen
dc.subjectIcelanden
dc.subjectLinkage (Genetics)en
dc.subjectLod Scoreen
dc.subjectMajor Histocompatibility Complexen
dc.subjectNailsen
dc.subjectPhenotypeen
dc.subjectPsoriasisen
dc.subjectScalp Dermatosesen
dc.subjectSkinen
dc.subjectWounds and Injuriesen
dc.subject.meshPsoriasisen
dc.titleGenetics of psoriasis in Iceland: evidence for linkage of subphenotypes to distinct Locien
dc.typeArticleen
dc.identifier.journalJournal of investigative dermatologyen
dc.format.digYES
html.description.abstractPsoriasis is a chronic inflammatory skin disease with overlapping subphenotypes. It has a strong complex genetic component, but has been problematic to identifying significant loci. We evaluated 1000 patients with chronic plaque psoriasis and documented several subphenotypes. Here we report results of genome-wide linkage scans for psoriasis genes in 238 Icelandic families with 874 patients. MHC linkage was confirmed with LOD score of 10.9. When the entire cohort was analyzed, two other loci with LOD scores of 2.5 and 1.5 were observed on 16q and 4q, respectively. Stratification into subphenotypes revealed additional loci with LOD scores exceeding or approaching significance. A LOD score of 5.7 appeared on 16q in PsA patients with analysis conditioned on parental inheritance. A LOD score of 3.6 on 4q was detected when disease occurred at or older than 17 y, our median cohort age. This locus was defined by a marker near one reportedly displaying significant linkage in a Chinese psoriasis population and near suggestive linkage in a Caucasian population. A LOD of 3.0 was observed on 10q when disease onset occurred in the scalp. Furthermore, clinical stratification either revealed or increased LOD scores when compared to unstratified analysis and some coincided with previous reports.


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