Figure 2.

Secretion of interleukin 17 and interleukin 22 by peripheral blood mononuclear cells from psoriatic arthritis and psoriasis patients and from healthy controls. The concentrations (Conc) of interleukin 17 (IL-17) (A) and IL-22 (B) in culture supernatants of peripheral blood mononuclear cells from patients with psoriasis (Ps) and patients with psoriatic arthritis (PsA) and from healthy controls four days after stimulation with anti-CD3/CD28. Correlations between percentages of IL-17+ and IL-22+CD4+ T cells and the concentrations of IL-17 (C) and IL-22 (D) in culture supernatants. * p<0.05, **p<0.01, ***p<0.001.

Benham et al. Arthritis Research & Therapy 2013 15:R136   doi:10.1186/ar4317
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