Journal
PEDIATRIC DERMATOLOGY
Volume 30, Issue 6, Pages 695-699Publisher
WILEY
DOI: 10.1111/pde.12222
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Funding
- Post Graduate Institute of Medical Education and Research
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Henoch-Schonlein purpura (HSP) is an acute systemic vasculitis with unknown etiology, although several studies have found HSP to be related to cytokines such as tumor necrosis factor , interleukin (IL)-1, and adhesion molecules. In the present study we determined the levels of cytokines such as IL-18 and endothelin-1 (ET-1) in children with HSP. Subjects were divided into three groups (group 1, 20 subjects with HSP; group 2, 10 subjects belonging to group 1 during their follow-up 4 to 6months later; and group 3, 16 controls who were healthy siblings of the subjects). IL-18 and ET-1 levels were determined using enzyme immunoassay and expressed as mean +/- standard deviation. We observed higher IL-18 levels in children with HSP (767.6 +/- 145.1pg/mL) than in controls (614.6 +/- 66.54pg/mL, p>0.05), but IL-18 levels were found to be significantly lower in subjects with HSP in remission (502.7 +/- 60.81pg/mL) than in those who were in an active phase (1,050 +/- 244.5pg/mL, p<0.05, n=10). ET-1 levels were found to be significantly higher in subjects with HSP (1.93 +/- 0.19pg/mL) than in controls (1.10 +/- 0.13pg/mL, p<0.05), although no significant difference was observed in ET-1 levels between subjects in group 1 (1.88 +/- 0.30pg/mL) and group 2 (1.91 +/- 0.120, p>0.05, n=10). A positive correlation was observed between IL-18 and ET-1 levels in subjects with HSP (correlation coefficient [r]=0.5254, p<0.01). These results suggest that levels of IL-18 and ET-1 are worth monitoring during the clinical course of the disease, but caution must be exercised in extrapolating data based on small study samples.
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