Johansson and colleagues have reported that eosinophils taken from the blood of patients with non-severe asthma have increased levels of surface associated platelets expressing P-selectin after whole-lung antigen challenge, and these were associated with increased α4β1-integrin very late antigen-4, but not αMβ2 integrin MAC-1 expression on a proportion of eosinophils (52). This evidence concerns the gene SELP and asthma.