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Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Eur+J+Immunol 2016 ; 46 (7): 1592-9 Nephropedia Template TP
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Efferocytosis as a regulator of macrophage chemokine receptor expression and polarization #MMPMID27139187
Angsana J; Chen J; Liu L; Haller CA; Chaikof EL
Eur J Immunol 2016[Jul]; 46 (7): 1592-9 PMID27139187show ga
Efferocytosis has been suggested to promote macrophage resolution programs that are dependent on motility and emigration, however, few studies have addressed directed migration in resolving macrophages. In this report, we hypothesized that efferocytosis would induce differential chemokine receptor expression. Polarized macrophage populations, including macrophages actively engaged in efferocytosis, were characterized by PCR array and traditional transwell motility assays. We identified specific up-regulation of chemokine receptor CXCR4 on both mouse and human macrophages and characterized in vivo expression of CXCR4 in a resolving model of murine peritonitis. Using adoptive transfer and AMD3100 blocking, we confirmed a role for CXCR4 in macrophage egress to draining lymphatics. Collectively these data provide an important mechanistic link between efferocytosis and macrophage emigration.