The IL23R A/Gln381 Allele Promotes IL-23 Unresponsiveness in Human Memory T- Helper 17 Cells and Impairs Th17 Responses in Psoriasis Patients  Paola Di.

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The IL23R A/Gln381 Allele Promotes IL-23 Unresponsiveness in Human Memory T- Helper 17 Cells and Impairs Th17 Responses in Psoriasis Patients  Paola Di Meglio, Federica Villanova, Luca Napolitano, Isabella Tosi, Manuela Terranova Barberio, Rose K. Mak, Sarah Nutland, Catherine H. Smith, Jonathan N.W.N. Barker, John A. Todd, Frank O. Nestle  Journal of Investigative Dermatology  Volume 133, Issue 10, Pages 2381-2389 (October 2013) DOI: 10.1038/jid.2013.170 Copyright © 2013 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 IL-23R A/Gln381 heterozygous and homozygous carriers have normal Th17 cell development. Peripheral blood mononuclear cells from healthy individuals homozygous for the common G allele (GG, green squares), heterozygous GA (red squares), or homozygous for the protective A (AA, blue squares) were assayed for intracellular cytokines, following phorbol 12-myristate 13-acetate (PMA)/ionomycin stimulation for 5hours. The frequency of IL-17A+ (a), IL-17F+ (b), IFN-γ+ (c), and IL-22+ (d) cells within memory CD4+ gate is shown. Each symbol represents one individual donor. Horizontal bars represent means (a, c) or medians (b, d). One-way analysis of variance, followed by Bonferroni post test (a, c) or Kruskal–Wallis test and Dunn’s multiple-comparison test (b, d), was performed, yielding P>0.05 for all comparisons. Journal of Investigative Dermatology 2013 133, 2381-2389DOI: (10.1038/jid.2013.170) Copyright © 2013 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 2 IL-23R A/Glu381 allele promotes IL-23 unresponsiveness in human memory Th17 cells. Supernatants of memory CD4+ T cells from healthy individuals homozygous for the common G allele (GG, green dots), heterozygous GA (red dots), or homozygous for the protective A allele (AA, blue dots), cultured with or without IL-23 for 72hours, were assayed for IL-17A (a), IL-17F (b), IFN-γ (c), and IL-22 (d) secretion. Data are shown as differential cytokine production (Δ) in cells cultured with versus without IL-23. Each symbol represents one individual donor. Dotted line denotes Δ=0. Horizontal bars represent means (a) or medians (b, c, d). One-way analysis of variance, followed by Bonferroni post test (a) or Kruskal–Wallis test and Dunn’s multiple-comparison test (b, c, d), was performed. *P<0.05, ***P<0.001. P>0.05 for all other comparisons. Journal of Investigative Dermatology 2013 133, 2381-2389DOI: (10.1038/jid.2013.170) Copyright © 2013 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 3 IL-23R A/Glu381 allele impairs IL-23-driven survival/expansion of human memory Th17 cells. Memory CD4+ T cells from healthy individuals homozygous for the common G allele (GG, green), heterozygous GA (red), or homozygous for the protective A allele (AA, blue), cultured with or without IL-23 for 72hours, were assayed for intracellular cytokines IL-17A, IL-17F, IFN-γ, and IL-22, after phorbol 12-myristate 13-acetate (PMA)/ionomycin stimulation for 6hours. (a) Representative dot plots of GG, GA, and AA individual donors. (b) Each connected symbol represents paired samples from one individual donor. Wilcoxon signed rank test (IL-17A: GG and AA, IL-17F: GA) or paired Student’s t-test (IL-17A: GA, IL-17F:GG, AA) was performed. *P<0.05. P>0.05 for all other paired comparisons. Journal of Investigative Dermatology 2013 133, 2381-2389DOI: (10.1038/jid.2013.170) Copyright © 2013 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 4 Effect of IL23R A/Glu381 allele on disease phenotype and Th17 cell development in psoriasis patients. (a) Psoriasis Area Severity Index (PASI) of psoriatic patients homozygous for the common G allele (GG, green dots) and heterozygous (GA, red squares) for the protective A allele. (b) Age at disease onset of psoriatic patients homozygous GG (green squares) and heterozygous GA (red squares). (c) Peripheral blood mononuclear cells from psoriatic patients homozygous GG (green squares) and heterozygous GA (red squares) were assayed for intracellular cytokines, after phorbol 12-myristate 13-acetate (PMA)/ionomycin stimulation for 5hours. Frequency of IL-17A+, IL-17F+, IFN-γ+, and IL-22+ cells within memory CD4+ gate is shown. Each symbol represents one individual donor; horizontal bars represent mean (c: IL-17A+) or medians (a, b, c: IL-17F+, IFNγ+, IL-22+). Unpaired Student’s t-test (c: IL-17A+) or Mann–Whitney test (a, b, c: IL-17F+, IFNγ+, IL-22+) was performed, yielding P>0.05 for all comparisons. Journal of Investigative Dermatology 2013 133, 2381-2389DOI: (10.1038/jid.2013.170) Copyright © 2013 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 5 IL23R A/Glu381 allele reduces IL-23 responsiveness in human memory Th17 cells and interrupts the IL-23/th17 axis in the skin of heterozygous psoriatic patients. (a) Memory CD4+ T cell supernatants from psoriatic patients homozygous GG (green dots) and heterozygous GA (red dots), cultured with or without IL-23 for 72hours, were assayed for IL-17A, IL-17F, IFN-γ, and IL-22 secretion. Data are shown as differential cytokine production (Δ) in cells cultured with versus without IL-23. Each symbol represents one individual donor. Dotted line denotes Δ=0. Horizontal bars represent medians. Mann–Whitney test was performed; *P<0.05. P>0.05 for all other comparisons. (b) IL-17A, IL-17F, IL-22, and IL-23p19 mRNA levels in psoriasis skin biopsies, relative to human acidic ribosomal protein (HuPO), were measured by quantitative reverse-transcriptase–PCR, and Spearman’s correlation between IL-23p19 and IL-17A (top), IL-22 (middle), and IL-17F (bottom) skin mRNA level of GG (left, green dots) or GA (right, red dots) patients was performed. Journal of Investigative Dermatology 2013 133, 2381-2389DOI: (10.1038/jid.2013.170) Copyright © 2013 The Society for Investigative Dermatology, Inc Terms and Conditions