Objective: This study investigated the serum levels of interleukin-5 (IL-5), leukotriene B4 (LTB4) and C-reactive protein (CRP) in children with Henoch-Schonlein purpura (HSP) at different phases to explore the role of IL-5, LTB4 and CRP in the pathogenesis of HSP.
Methods: Serum levels of IL-5, LTB4 and CRP in 27 normal children and 31 children with HSP at the acute phase and the early recovery phase were detected using ELISA.
Results: The serum levels of IL-5, LTB4 and CRP in children with HSP were 53.8 +/- 4.2 pg/mL, 95.3 +/- 12.0 pg/mL and 36.10 +/- 11.78 mg/L, respectively at the acute phase. The values were significantly decreased at the early recovery phase (37.8 +/- 3.9 pg/mL, 45.7 +/- 10.1 pg/mL, 18.35 +/- 6.43 mg/L; P < 0.01), but remained higher than those in normal controls (12.7 +/- 3.2 pg/mL, 17.6 +/- 5.7 pg/mL, 4.75 +/- 2.85 mg/L; P < 0.01). The serum levels of IL-5 and LTB4 positively correlated to the CRP level.
Conclusions: The serum levels of IL-5 and LTB4 in children with HSP increased during the acute phase and decreased at the early recovery phase, suggesting that IL-5 and LTB4 may be involved in the pathogenesis of HSP.
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