A Comprehensive Analysis of Pattern Recognition Receptors in Normal and Inflamed Human Epidermis: Upregulation of Dectin-1 in Psoriasis  Heleen D. de.

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A Comprehensive Analysis of Pattern Recognition Receptors in Normal and Inflamed Human Epidermis: Upregulation of Dectin-1 in Psoriasis  Heleen D. de Koning, Diana Rodijk-Olthuis, Ivonne M.J.J. van Vlijmen-Willems, Leo A.B. Joosten, Mihai G. Netea, Joost Schalkwijk, Patrick L.J.M. Zeeuwen  Journal of Investigative Dermatology  Volume 130, Issue 11, Pages 2611-2620 (November 2010) DOI: 10.1038/jid.2010.196 Copyright © 2010 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Relative mRNA expression levels of PRRs and related signaling molecules in human epidermis. (a) TLRs; (b) NLRs, CLRs, and RLRs; and (c) other PRR-related signaling molecules. mRNA expression data from human epidermal sheets of normal skin (N=5), psoriatic plaques (N=9), and AD lesions (N=6). TLR4 in normal skin was used as a reference value (relative quantity of 1) in calculating the relative quantities of all gene expression levels. It is to be noted that the relative quantity is presented in a log10 scale. Bars indicate mean±SEM. *P-value <0.05 compared with normal skin. AD, atopic dermatitis; NS, normal skin; PS, psoriasis. Journal of Investigative Dermatology 2010 130, 2611-2620DOI: (10.1038/jid.2010.196) Copyright © 2010 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 2 Protein expression of dectin-1, melanoma differentiation-associated gene-5 (MDA5), and ICEBERG in human epidermis. Immunohistochemical staining of normal skin, psoriatic plaques, and atopic dermatitis lesions. Each picture is representative of data from three different individuals. Bar=100μm. Journal of Investigative Dermatology 2010 130, 2611-2620DOI: (10.1038/jid.2010.196) Copyright © 2010 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 3 Relative mRNA expression levels of CLEC7A (dectin-1) in a panel of human tissues. Equal amounts from each tissue were analyzed by qPCR. CLEC7A expression levels in normal epidermis, psoriasis, and atopic dermatitis were taken from Figure 1. Normal epidermis was used as a reference value (relative quantity of 1) in calculating the relative quantities of all gene expression levels. PBMCs, peripheral blood mononuclear cells. Journal of Investigative Dermatology 2010 130, 2611-2620DOI: (10.1038/jid.2010.196) Copyright © 2010 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 4 Cytokine-mediated induction of CLEC7A (dectin-1) transcription in cultured primary keratinocytes. Confluent cell cultures (N=4–8) were stimulated for 24 and 48hours with IL-4 (50ngml−1) and IL-13 (50ngml−1); IL-17 (30ngml−1) and IL-22 (30ngml−1); IFN-α (500Uml−1); or IFN-γ (500Uml−1). *P-value <0.05, **P-value <0.001. Journal of Investigative Dermatology 2010 130, 2611-2620DOI: (10.1038/jid.2010.196) Copyright © 2010 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 5 Host response gene expression in cultured primary keratinocytes on stimulation with dectin-1, TLR2, and TLR5 ligands. After 24-hour preincubation with IFN-γ, confluent keratinocyte cultures (N=4) were stimulated for 48hours with β-glucan (50μgml−1) or heat-killed (HK) Candida (5*106ml−1) with or without addition of Pam3Cys-SKKKK (10μgml−1) or flagellin (1μgml−1). Gray versus white bars indicate the (synergistic) effect of dectin-1 stimulation and black versus white bars the (synergistic) effect of concerted fungal receptor stimulation. (Supplementary Figure S2 online shows 24-hour stimulation data.) (a) Relative quantity (RQ) of mRNA levels. (b) Protein levels of IL-6, IL-8, and hBD-2 in the supernatants are measured by ELISAs. It is to be noted that the data are presented in a log10 scale. Bars indicate mean±SEM. *P-value <0.05. Journal of Investigative Dermatology 2010 130, 2611-2620DOI: (10.1038/jid.2010.196) Copyright © 2010 The Society for Investigative Dermatology, Inc Terms and Conditions