The role of CCL22 (MDC) for the recruitment of eosinophils during allergic pleurisy in mice

Journal of Leukocyte Biology

Danielle G. Souza¹  Ana Letícia Alessandri¹  Mauro M. Teixeira¹  Vanessa Pinho¹  Denise Vasconcelos¹  Nicholas W. Lukacs²  Sandra H. Oliveira³ 

[1] Immunopharmacology, Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Immunopharmacology, Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Immunopharmacology, Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil;;Department of Pathology, University of Michigan Medical School, Ann Arbor Department of Pathology, University of Michigan Medical School, Ann Arbor Department of Pathology, University of Michigan Medical School, Ann Arbor;Department of Pharmacology, Faculty of Medicine of Ribeirão Preto, São Paulo, Brazil; and Department of Pharmacology, Faculty of Medicine of Ribeirão Preto, São Paulo, Brazil; and Department of Pharmacology, Faculty of Medicine of Ribeirão Preto, São Paulo, Brazil; and

关键词: chemokines;    eotaxin (CCL11);    PAF;    migration;   

DOI  :  10.1189/jlb.0502243

学科分类：生理学

来源: Federation of American Societies for Experimental Biology

【 摘 要 】

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.

【 授权许可】

Unknown