Contact Info & Biography
Education & Training
Memberships & Awards

Johann E. Gudjonsson, MD, PhD

Arthur C. Curtis Professor of Skin Molecular Immunology,
Frances and Kenneth Eisenberg Emerging Scholar,
Associate Professor, Department of Dermatology

Selected Publications

  1. Sigmundsdottir H, Gudjonsson JE, Jonsdottir I, Ludviksson BR, Valdimarsson H. The frequency of CLA+ CD8+ T cells in the blood of psoriasis patients correlates closely with the severity of their disease. Clin Exp Immunol. 2001;126(2):365-369.
  2. Goodjonsson JE, Karason A, Antonsdottir AA, Runarsdottir EH, Gulcher JR, Stefansson K, Valdimarsson H. HLA-Cw6-positive and HLA-Cw6-negative patients with Psoriasis vulgaris have distinct clinical features. J Invest Dermatol. 2002;118(2):362-365.
  3. Karason A, Gudjonsson JE, Upmanyu R, Antonsdottir AA, Hauksson VB, Runarsdottir EH, Jonsson HH , Gudbjartsson DR, Frigge ML, Kong A, Stefansson K, Valdimarsson H, Gulcher JR. A susceptibility gene for psoriatic arthritis maps to chromosome 16q: evidence for imprinting. Am J Hum Genet. 2003;72(1):125-131.
  4. Gudjonsson JE, Karason A, Antonsdottir A, Runarsdottir EH, Hauksson VB, Upmanya R, Gulcher J, Stefansson K, Valdimarsson H. Psoriasis patients who are homozygous for the HLA-Cw*0602 allele have a 2.5-fold increased risk of developing psoriasis compared with Cw6 heterozygotes. Br J Dermatol. 2003;148(2):233-235.
  5. Sigmundsdottir H, Gudjonsson JE, Valdimarsson H. Interleukin-12 alone can not enhance the expression of the cutaneous lymphocyte associated antigen (CLA) by superantigen-stimulated T lymphocytes. Clin Exp Immunol. 2003;132(3):430-435.
  6. Sigmundsdottir H, Gudjonsson JE, Valdimarsson H. The effects of ultraviolet B treatment on the expression of adhesion molecules by circulating T lymphocytes in psoriasis. Br J Dermatol. 2003;148(5):996-1000.
  7. Gudjonsson JE, Thorarinsson AM, Sigurgeirsson B, Kristinsson KG, Valdimarsson H. Streptococcal throat infections and exacerbation of chronic plaque psoriasis: a prospective study. Br J Dermatol. 2003;149(3):530-534.
  8. Valdimarsson H, Vikingsdottir T, Bang P, Saevarsdottir S, Gudjonsson JE, Oskarsson O, Christiansen M, Blou L, Laursen I, Koch C. Human plasma-derived mannose-binding lectin: a phase I safety and pharmacokinetic study. Scand J Immunol. 2004;59(1):97-102.
  9. Gudjonsson JE, Johnston A, Sigmundsdottir H, Valdimarsson H. Immunopathogenic mechanisms in psoriasis. Clin Exp Immunol. 2004;135(1):1-8.
  10. Sigmundsdottir H, Johnston A, Gudjonsson JE, Valdimarsson H. Differential effects of interleukin 12 and interleukin 10 on superantigen-induced expression of cutaneous lymphocyte-associated antigen (CLA) and alphaEbeta7 integrin (CD103) By CD8+ T cells. Clin Immunol. 2004;111(1):119-125.
  11. Sigmundsdottir H, Johnston A, Gudjonsson JE, Bjarnason B, Valdimarsson H. Methotrexate markedly reduces the expression of vascular E-selectin, cutaneous lymphocyte-associated antigen and the numbers of mononuclear leucocytes in psoriatic skin. Exp Dermatol. 2004;13(7):426-434.
  12. Valdimarsson H, Karason A, Gudjonsson JE. Psoriasis: a complex clinical and genetic disorder. Curr Rheumatol Rep. 2004;6(4):314-316.
  13. Johnston A, Gudjonsson JE, Sigmundsdottir H, Love TJ, Valdimarsson H. Peripheral blood T cell responses to keratin peptides that share sequences with streptococcal M proteins are largely restricted to skin-homing CD8+ T cells. Clin Exp Immunol. 2004;138(1):83-93.
  14. Johnston A, Gudjonsson JE, Sigmundsdottir H, Ludviksson BR, Valdimarsson H. The anti-inflammatory action of methotrexate is not mediated by lymphocyte apoptosis, but by the suppression of activation and adhesion molecules. Clin Immunol. 2005;114(2):154-163.
  15. Elder JT; Cluster 17 Collaboration. Fine mapping of the psoriasis susceptibility gene PSORS1: a reassessment of risk associated with a putative risk haplotype lacking HLA-Cw6. J Invest Dermatol. 2005;124(5):921-930.
  16. Karason A, Gudjonsson JE, Jonsson HH, Hauksson VB, Runarsdottir EH, Stefansson K, Valdimarsson H, Gulcher JR. Genetics of psoriasis in Iceland: evidence for linkage of subphenotypes to distinct Loci. J Invest Dermatol. 2005;124(6):1177-1185.
  17. Sigmundsdottir H, Johnston A, Gudjonsson JE, Valdimarsson H. Narrowband-UVB irradiation decreases the production of pro-inflammatory cytokines by stimulated T cells. Arch Dermatol Res. 2005;297(1):39-42.
  18. Gudjonsson JE, Elder JT. Mouse models: psoriasis: an epidermal disease after all? Eur J Hum Genet. 2006;14(1):2-4.
  19. Gudjonsson JE, Karason A, Runarsdottir EH, Antonsdottir AA, Hauksson VB, Jonsson HH, Gulcher J, Stefansson K, Valdimarsson H. Distinct clinical differences between HLA-Cw*0602 positive and negative psoriasis patients--an analysis of 1019 HLA-C- and HLA-B-typed patients. J Invest Dermatol. 2006;126(4):740-745.
  20. Gudjonsson JE, Johnston A, Dyson M, Valdimarsson H, Elder JT. Mouse models of psoriasis. J Invest Dermatol. 2007;127(6):1292-1308.
  21. Rittie L, Kansra S, Stoll SW, Li Y, Gudjonsson JE, Shao Y, Michael LE, Fisher GJ, Johnson TM, Elder JT. Differential ErbB1 signaling in squamous cell versus basal cell carcinoma of the skin. Am J Pathol. 2007;170(6):2089-2099. PMCID: PMC1899432.
  22. Gudjonsson JE, Elder JT. Psoriasis: epidemiology. Clin Dermatol. 2007;25(6):535-546.
  23. Love TJ, Gudbjornsson B, Gudjonsson JE, Valdimarsson H. Psoriatic arthritis in Reykjavik, Iceland: prevalence, demographics and disease course. J Rheumatol. 2007;34(10):2082-2088.
  24. Do TT, Gielczyk R, Wang TS, Olsen S, Lowe L, Gudjonsson JE. Multinodular lesions of the earlobes. Arch Dermatol. 2008;144(4):547-552.
  25. Nair RP, Duffin KC, Helms C, Ding J, Stuart PE, Goldgar D, Gudjonsson JE, Li Y, Tejasvi T, Feng BJ, Ruether A, Schreiber S, Weichenthal M, Gladman D, Rahman P, Schrodi SJ, Prahalad S, Guthery SL, Fischer J, Liao W, Kwok PY, Menter A, Lathrop GM, Wise CA, Begovich AB, Voorhees JJ, Elder JJ, Krueger GG, Bowcock AM, Abecasis GR; Collaborative Association of Psoriasis. Genome-wide scan reveals association of psoriasis with IL-23 and NF-kB pathways. Nat Genet. 41(2):199-204, 2009.
  26. Gudjonsson JE, Johnston A, Stoll SW, Riblett MB, Xing X, Kochkodan JJ, Ding J, Nair RP, Aphale A, Voorhees JJ, Elder JT. Evidence for altered Wnt signaling in psoriatic skin. J Invest Dermatol. 130(7):1849-59, 2010.
  27. Gudjonsson JE, Ding J, Johnston A, Tejasvi T, Guzman AM, Nair RP, Voorhees JJ, Abecasis GR, Elder JT. Assessment of the psoriatic transcriptome in a large sample: additional regulated genes and comparisons with in vitro models. J Invest Dermatol. 130(7):1829-40, 2010.
  28. Stuart PE, Nair RP, Ellinghaus E, Ding J, Tejasvi T, Gudjonsson JE, Li Y, Weidinger S, Eberlein B, Gieger C, Wichmann HE, Kunz M, Ike R, Krueger GG, Bowcock AM, Mroweitz U, Lim HW, Voorhees JJ, Abecasis GR, Weichenthal M, Franke A, Rahman P, Gladman DD, Elder JT. Genome-wide association analysis identifies three psoriasis susceptibility loci. Nat Genet.42(11):1000-4, 2010.
  29. Ding J, Gudjonsson JE, Liang L, Stuart PE, Li Y, Chen W, Weichenthal M, Ellinghaus E, Franke A, Cookson W, Nair RP, Elder JT, Abecasis GR. Gene expression in skin and lymphoblastoid cells: Refined statistical method reveals extensive overlap in cis-eQTL signals. Am J Hum Genet. 87(6):779-89, 2010.


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