Allele-Specific Cytokine Responses at the HLA-C Locus: Implications for Psoriasis

被引:23
|
作者
Hundhausen, Christian [1 ]
Bertoni, Anna [2 ]
Mak, Rose K. [1 ]
Botti, Elisabetta [1 ,3 ]
Di Meglio, Paola [1 ]
Clop, Alex [2 ]
Laggner, Ute [1 ]
Chimenti, Sergio [3 ]
Hayday, Adrian C. [4 ,5 ]
Barker, Jonathan N. [1 ]
Trembath, Richard C. [2 ,6 ]
Capon, Francesca [2 ]
Nestle, Frank O. [1 ]
机构
[1] Kings Coll London, St Johns Inst Dermatol, Guys Hosp, London WC2R 2LS, England
[2] Kings Coll London, Dept Med & Mol Genet, Guys Hosp, London WC2R 2LS, England
[3] Univ Roma Tor Vergata, Dept Dermatol, Rome, Italy
[4] Kings Coll London, Div Immunol Infect & Inflammatory Dis, Guys Hosp, London WC2R 2LS, England
[5] Canc Res UK, London Res Inst, London, England
[6] Queen Mary Univ London, Barts & London Sch Med & Dent, London, England
基金
英国惠康基金; 美国国家卫生研究院; 英国医学研究理事会;
关键词
GENOME-WIDE ASSOCIATION; SUSCEPTIBILITY LOCI; T-CELL; GENE; IMMUNOPATHOGENESIS; IDENTIFICATION; MECHANISMS; EXPRESSION; MOLECULES; VULGARIS;
D O I
10.1038/jid.2011.378
中图分类号
R75 [皮肤病学与性病学];
学科分类号
100206 ;
摘要
Psoriasis is an inflammatory skin disorder that is inherited as a complex trait. Genetic studies have repeatedly highlighted HLA-C as the major determinant for psoriasis susceptibility, with the Cw*0602 allele conferring significant disease risk in a wide range of populations. Despite the potential importance of HLA-C variation in psoriasis, either via an effect on peptide presentation or immuno-inhibitory activity, allele-specific expression patterns have not been investigated. Here, we used reporter assays to characterize two regulatory variants, which virtually abolished the response to tumor necrosis factor (TNF)-alpha (rs2524094) and IFN-gamma (rs10657191) in HLA-Cw*0602 and a cluster of related alleles. We validated these findings through the analysis of HLA-Cw*0602 expression in primary keratinocytes treated with TNF-alpha and IFN-gamma. Finally, we showed that HLA-Cw*0602 transcripts are not increased in psoriatic skin lesions, despite highly elevated TNF-alpha levels. Thus, our findings demonstrate the presence of allele-specific differences in HLA-C expression and indicate that HLA-Cw*0602 is unresponsive to upregulation by key proinflammatory cytokines in psoriasis. These data pave the way for functional studies into the pathogenic role of the major psoriasis susceptibility allele.
引用
收藏
页码:635 / 641
页数:7
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