2013
DOI: 10.1074/jbc.m112.445510
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Induction of C-X-C Chemokine Receptor Type 7 (CXCR7) Switches Stromal Cell-derived Factor-1 (SDF-1) Signaling and Phagocytic Activity in Macrophages Linked to Atherosclerosis

Abstract: Background: Previously, whether the new SDF-1 receptor CXCR7 plays a role in macrophages linked to disease was unknown. Results: During macrophage differentiation, CXCR7 is up-regulated, detected in mouse atherosclerotic plaques, and mediates pro-phagocytic activity via JNK and p38 pathways. Conclusion: CXCR7 is a functional SDF-1 receptor in macrophages. Significance: Macrophage CXCR7 might be a new therapeutic target for atherosclerosis.

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Cited by 66 publications
(81 citation statements)
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References 36 publications
(32 reference statements)
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“…Our findings from PLAs and FACS analyses are consistent with the absence of cell surface CXCR7 in THP-1 cells which have not been differentiated into a macrophage-like phenotype [11]. This suggests that monocytic THP-1 cells are a suitable cell system to study the interaction of SDF-1α and ubiquitin on CXCR4, in which possible confounding effects of CXCR7, such as scavenging of SDF-1α or CXCR4-CXCR7 heterodimer formation, are unlikely.…”
Section: Discussionsupporting
confidence: 84%
“…Our findings from PLAs and FACS analyses are consistent with the absence of cell surface CXCR7 in THP-1 cells which have not been differentiated into a macrophage-like phenotype [11]. This suggests that monocytic THP-1 cells are a suitable cell system to study the interaction of SDF-1α and ubiquitin on CXCR4, in which possible confounding effects of CXCR7, such as scavenging of SDF-1α or CXCR4-CXCR7 heterodimer formation, are unlikely.…”
Section: Discussionsupporting
confidence: 84%
“…28 However, it is unlikely that CXCR7 directly compensates for such effects, because it is not expressed on BM cells. Although CXCR7 expression has been reported previously in lesional macrophages, 29 we did not detect CXCR7 in injured arteries, and genetic deletion of Cxcr7 in BM cells had no effect on neointima formation, which indicates a minor role of CXCR7 in macrophages during vascular repair.…”
Section: Discussioncontrasting
confidence: 47%
“…CD68 is a marker of both monocytes and macrophage but is generally found to be increased after macrophage differentiation by PMA 44,45 . After 16 hr treatment of the THP-1 cells with PMA, CD68 was found to be upregulated (Fig.…”
Section: Resultsmentioning
confidence: 99%