Yukinori Okada, Buhm Han, Lam C. Tsoi, Philip E

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Presentation transcript:

Fine Mapping Major Histocompatibility Complex Associations in Psoriasis and Its Clinical Subtypes  Yukinori Okada, Buhm Han, Lam C. Tsoi, Philip E. Stuart, Eva Ellinghaus, Trilokraj Tejasvi, Vinod Chandran, Fawnda Pellett, Remy Pollock, Anne M. Bowcock, Gerald G. Krueger, Michael Weichenthal, John J. Voorhees, Proton Rahman, Peter K. Gregersen, Andre Franke, Rajan P. Nair, Gonçalo R. Abecasis, Dafna D. Gladman, James T. Elder, Paul I.W. de Bakker, Soumya Raychaudhuri  The American Journal of Human Genetics  Volume 95, Issue 2, Pages 162-172 (August 2014) DOI: 10.1016/j.ajhg.2014.07.002 Copyright © 2014 The Authors Terms and Conditions

Figure 1 Plots of Nominal Association between the MHC Variants and PsV and Its Subphenotypes of PsA and PsC Each diamond represents the –log10(p) of the variants, including SNPs, classical HLA or MICA alleles, and amino acid polymorphisms encoded by the HLA genes or MICA. The dotted horizontal line represents the significance threshold of p = 5.0 × 10−8. The bottom panel shows the physical positions of the HLA genes, MICA, and PSORS1 on chromosome 6 (UCSC Genome Browser hg18). We tested four binary phenotypes: (A) PsV-affected versus control individuals, (B) PsA-affected versus control individuals, (C) PsC-affected versus control individuals, and (D) PsA-affected versus PsC-affected individuals. The American Journal of Human Genetics 2014 95, 162-172DOI: (10.1016/j.ajhg.2014.07.002) Copyright © 2014 The Authors Terms and Conditions

Figure 2 Plots of Stepwise Conditional Association of the Variants in the MHC Region (A–E) Stepwise analysis of HLA-C, HLA-B, HLA-A, and HLA-DQA1 in PsV-affected versus control individuals. (F and G) Stepwise analysis of HLA-B in PsA versus PsC individuals. Each diamond represents the –log10(p) of the variants, including SNPs, classical HLA or MICA alleles, and amino acid polymorphisms encoded by the HLA genes or MICA. The dotted horizontal line represents the significance threshold of p = 5.0 × 10−8. The most strongly associated amino acid polymorphisms and HLA classical alleles are labeled when their associations satisfied p < 5.0 × 10−8. The American Journal of Human Genetics 2014 95, 162-172DOI: (10.1016/j.ajhg.2014.07.002) Copyright © 2014 The Authors Terms and Conditions

Figure 3 Plots of Stepwise Conditional Association of the HLA Amino Acid Polymorphisms and Classical HLA Alleles (A–D) Stepwise analysis of HLA-C, HLA-B, HLA-A, and HLA-DQA1 in PsV-affected versus control individuals. (E) Stepwise analysis of HLA-B in PsA-affected versus PsC-affected individuals. Each diamond represents the –log10(pomnibus) of the amino acid polymorphism encoded by the HLA gene. The colored horizontal line represents the –log10(pomnibus) of the most strongly associated classical allele of the HLA gene. The dotted horizontal line represents the significance threshold of p = 5.0 × 10−8. The most strongly associated amino acid polymorphisms and HLA classical alleles are labeled when their associations satisfied p < 5.0 × 10−8. The American Journal of Human Genetics 2014 95, 162-172DOI: (10.1016/j.ajhg.2014.07.002) Copyright © 2014 The Authors Terms and Conditions

Figure 4 Associations of Classical HLA-B Alleles and HLA-B Amino Acid Position 45 for PsA versus PsC Individuals The –log10(p) of HLA-B classical two- and four-digit HLA-B alleles and HLA-B amino acid residues at position 45 in PsA versus PsC individuals. HLA-B Glu45 demonstrated the strongest association (p = 2.9 × 10−12; highlighted with a red circle), whereas the HLA-B classical alleles showed much smaller effects (p > 1.0 × 10−4). The American Journal of Human Genetics 2014 95, 162-172DOI: (10.1016/j.ajhg.2014.07.002) Copyright © 2014 The Authors Terms and Conditions

Figure 5 3D Ribbon Models for HLA-B HLA-B structures are based on Protein Data Bank entry 2bvp36 and were prepared with UCSF Chimera version 1.7.37 Amino acid position 67 and 9 residues associated with overall PsV risk are highlighted as red and pink spheres, respectively. An amino acid position 45 residue associated with subphenotype risk heterogeneity (PsA versus PsC) is highlighted as a green sphere. The American Journal of Human Genetics 2014 95, 162-172DOI: (10.1016/j.ajhg.2014.07.002) Copyright © 2014 The Authors Terms and Conditions