Adiponectin inhibits chemokine-induced cell migration via direct interaction with platelet factor 4

Despite adiponectin's recognized anti-inflammatory properties, its impact on cardiovascular homeostasis involves poorly defined mechanisms. We investigated the effect of adiponectin on chemokine-induced cell migration and their potential intermolecular interactions. Our findings revealed that cell migration induced by recombinant PF4, MCP-1, or RANTES in HL-60 cells was significantly inhibited by pre-treating cells with adiponectin. Surface plasmon resonance analysis and molecular docking analysis indicated that only PF4 binds to adiponectin with a higher affinity of adiponectin to the PF4 binding site respectively. These results suggest that adiponectin's atheroprotective functions may be mediated by its ability to reduce PF4-induced monocyte migration through direct interaction.