Abstract

Eosinophils contribute to allergic asthma exacerbation and can undergo excessive recruitment to the lungs where their activation leads to tissue damage and fibrosis. Interleukin-5 (IL-5) family cytokine receptors, which are critical for eosinophil recruitment/activation, are proposed to exist in membrane microdomains. Because cholesterol-rich microdomains are linked to signal regulation in diverse receptor systems, and because hypercholesterolemia is an asthma risk-factor, we tested the hypothesis that cholesterol-rich plasma membrane microdomains are central to IL-5-family cytokine action in eosinophils.

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