Stem cell factor-mediated activation pathways promote murine eosinophil CCL6 production and survival

Journal of Leukocyte Biology

Molly Thomas¹  Aaron Berlin¹  Vladislav Dolgachev¹  Nicholas W. Lukacs¹ 

[1] Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USADepartment of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USADepartment of Pathology, University of Michigan Medical School, Ann Arbor, Michigan, USA

关键词: SCF;    cell signaling;   

DOI  :  10.1189/jlb.0906595

学科分类：生理学

来源: Federation of American Societies for Experimental Biology

【 摘 要 】

Eosinophil activation during allergic diseases has a detrimental role in the generation of pathophysiologic responses. Stem cell factor (SCF) has recently shown an inflammatory, gene-activating role on eosinophils and contributes to the generation of pathophysiologic changes in the airways during allergic responses. The data in the present study outline the signal transduction events that are induced by SCF in eosinophils and further demonstrate that MEK-mediated signaling pathways are crucial for SCF-induced CCL6 chemokine activation and eosinophil survival. SCF-mediated eosinophil activation was demonstrated to include PI-3K activation as well as MEK/MAPK phosphorylation pathways. Subsequent analysis of CCL6 gene activation and production induced by SCF in the presence or absence of rather specific inhibitors for certain pathways demonstrated that the MEK/MAPK pathway but not the PI-3K pathway was crucial for the SCF-induced CCL6 gene activation. These same signaling pathways were shown to initiate antiapoptotic events and promote eosinophil survival, including up-regulation of BCL2 and BCL3. Altogether, SCF appears to be a potent eosinophil activation and survival factor.

【 授权许可】

Unknown