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The role of CCL22 (MDC) for the recruitment of eosinophils during allergic pleurisy in mice
Author(s) -
Pinho Vanessa,
Oliveira Sandra H.,
Souza Danielle G.,
Vasconcelos Denise,
Alessandri Ana Letícia,
Lukacs Nicholas W.,
Teixeira Mauro M.
Publication year - 2003
Publication title -
journal of leukocyte biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.819
H-Index - 191
eISSN - 1938-3673
pISSN - 0741-5400
DOI - 10.1189/jlb.0502243
Subject(s) - eosinophil , degranulation , immunology , in vivo , ccl22 , allergic inflammation , chemotaxis , sensitization , ccl11 , eotaxin , in vitro , biology , inflammation , chemokine , asthma , cxcl10 , biochemistry , receptor , microbiology and biotechnology
Eosinophils are important inflammatory cells in allergic diseases. In the present study, we have investigated the effects of CCL22 on the recruitment of eosinophils in vivo and in vitro. CCL22 induced a dose‐ and time‐dependent recruitment of eosinophils into the pleural cavity of mice, and this was dependent on the release of platelet‐activating factor (PAF) and subsequent generation of CCL11. However, in an allergic pleurisy model, an anti‐CCL22 polyclonal antibody given during sensitization or before challenge had no significant effect on eosinophil recruitment. CCL22 did not induce eosinophil chemotaxis in vitro but was able to induce eosinophil degranulation in vitro and in vivo. In conclusion, we show that although exogenously added CCL22 may induce eosinophil migration in vivo via release of PAF and CCL11 (eotaxin), endogenous production of CCL22 does not drive eosinophil migration during allergic inflammation. However, CCL22 may be an important activator of eosinophils once these cells have migrated into tissue.