Abstract
Data gathered prove that circulating platelets are activated upon human allergic inflammation, partly as a result of direct IgE-mediated process. It has been indicated that platelets may contribute to pathogenesis of atopic eczema/dermatitis syndrome (AEDS). Authors of the recent study have investigated systemic platelet activation in patients with AEDS on the basis of blood level of beta-thromboglobulin (beta-TG) and platelet factor 4 (PF4), which are recognized markers of platelet activation, also belonging to C-X-C chemokine family. Plasma levels of beta-TG and PF4 were measured by enzyme-linked immunoassay (ELISA) in 18 AEDS patients with moderate disease activity and 23 healthy, nonatopic individuals. No differences in peripheral platelet count of the two groups were noted. Only four (33.3%) AEDS patients represented beta-TG and PF4 within the control range; plasma beta-TG and PF4 were significantly increased (p < 0.001) in the AEDS group compared as a whole with the control subjects. No association between circulating concentrations of beta-TG or PF4 and total IgE levels in AEDS patients was proved. The results suggest that some patients with AEDS may have enhanced blood platelet activity as expressed by beta-TG and PF4 level.
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