Compartmentalized protective and detrimental effects of endogenous macrophage migration-inhibitory factor mediated by CXCR2 in a mouse model of myocardial ischemia/reperfusion.

ABSTRACT:

Objective

Here, we aimed to clarify the role of CXC chemokine receptor (CXCR) 2 in macrophage migration-inhibitory factor (MIF)-mediated effects after myocardial ischemia and reperfusion. As a pleiotropic chemokine-like cytokine, MIF has been identified to activate multiple receptors, including CD74 and CXCR2. In models of myocardial infarction, MIF exerts both proinflammatory effects and protective effects in cardiomyocytes. Similarly, CXCR2 displays opposing effects in resident versus circulating cells.

Approach and results

Using bone marrow transplantation, we generated chimeric mice with Cxcr2(-/-) bone marrow-derived inflammatory cells and wild-type (wt) resident cells (wt/Cxcr2(-/-)), Cxcr2(-/-) cardiomyocytes and wt bone marrow-derived cells (Cxcr2(-/-)/wt), and wt co

SUBMITTER: Liehn EA 

PROVIDER: S-EPMC4337944 | biostudies-literature | 2013 Sep

REPOSITORIES: biostudies-literature