Skin and liver expression of A-SAA in a mouse model of psoriasiform dermatitis.

<p>C57BL/6 mice were treated daily during six days with imiquimod 5% cream (IMQ), with Vaseline (VAS) or were not treated (NT). (A) SAA1/2 and (B) SAA3 mRNA expression was determined by RT-qPCR. All data represent mean ± SEM relative expression to <i>GAPDH</i>. Statistical comparisons were performed using t test (*p<0.05; **p<0.01; ns, non-significant).</p

A-SAA production by NHEK stimulated with human IL-1α, IL-17A, IL-22, OSM, TNF-α, alone or in combination.

<p>(A) A-SAA mRNA expression and (B) protein secretion by NHEK stimulated with M5 were analyzed at different time-periods. (C) A-SAA mRNA expression and (D) protein secretion were determined 40 hours after cytokine activation. (E) A-SAA mRNA expression and (F) protein secretion by NHEK 40 hours after stimulation with four cytokines by sequentially subtracting either recombinant IL-1α, IL-17A, IL-22, OSM or TNF-α from M5. A-SAA mRNA and protein were quantified by RT-qPCR in NHEK and ELISA in supernatants, respectively. Data represent the mean ± SEM of three experiments with duplicates. Statistical comparisons were performed using 2way ANOVA test or t test (*p<0.05; **p<0.01; ***p<0.001). (G) Compared to resting control, (H) intracellular A-SAA staining was detected by immunofluorescence in the cytoplasm of NHEK stimulated with M5 in the presence of brefeldin A.</p

A-SAA mRNA expression in the skin and the serum of psoriatic and control patients.

<p>A-SAA mRNA expression in (A) the skin and (B) the serum of psoriatic patients is compared to healthy controls. Positive correlations of (C) serum A-SAA and CRP protein levels and (D) A-SAA mRNA expression in the skin and A-SAA protein concentrations in the serum of psoriatic patients. A-SAA mRNA levels from psoriatic skins are increased with (E) psoriasis severity, as evaluated by PASI, (F) disease duration, (G) cigarette smoking and (H) metabolic syndrome, respectively. A-SAA mRNA expression from 37 psoriatic skins was compared to 28 healthy skins and quantified by RT-qPCR. A-SAA protein concentrations in 17 psoriatic sera were determined by immunonephelemetry and compared to those of 11 healthy sera. Values are expressed as mean ± SEM. Statistical comparisons were performed using t test or Spearman rank correlation test (*p<0.05; **p<0.01; ***p<0.0001; ns, non-significant).</p

Expression of proinflammatory mediators by A-SAA-stimulated NHEK and in synergy with IL-17A.

<p>(A) NHEK were incubated with A-SAA (10 μg/ml) for 24 hours and the expression of TNF-α, S100A7, S100A8, hBD2, CCL20 and A-SAA was determined by RT-qPCR. (B) IL-17A (10 ng/ml) had a synergistic effect with rA-SAA. After A-SAA and IL-17A costimulation, mRNA expression of S100A7, hBD2 and A-SAA were further increased compared to A-SAA or IL-17A alone. Three independent experiments with duplicates were performed. Values are expressed as mean ± SEM fold change above unstimulated NHEK. Statistical comparisons were performed using t test (*p<0.05; **p<0.01; ***p<0.001).</p

Characteristics of psoriatic patients.

<p>Data are expressed as Mean ± SD or percentage (%). Abbreviations: PASI (Psoriasis Area and Severity Index), BMI (Body Mass Index).</p

A-SAA and IL-17A expression in skin samples from atopic dermatitis and psoriasis patients.

<p>Cutaneous expression of (A) A-SAA and (B) IL-17A mRNA in freshly isolated skin samples, measured by RT-qPCR. All data are represented as mean ± SEM relative expression to <i>GAPDH</i>. Statistical comparisons were performed using t test (*p<0.05; ***p<0.0001; ns, non-significant).</p