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- W1977492069 abstract "Cancer cells recruit monocytes, macrophages and other inflammatory cells by producing abundant chemoattractants and growth factors, such as macrophage colony-stimulating factor (M-CSF/CSF-1) and monocyte chemoattractant protein-1 (MCP-1/CCL2), to promote tumor growth and dissemination. An understanding of the mechanisms that target cancer cells and regulate tumor microenvironment is essential in designing anticancer therapies. Here, we showed that serum amyloid-A (SAA) and cathelicidin (LL-37) stimulated M-CSF and MCP-1 expression with or without lipopolysaccharide (LPS) administration; conversely, lipoxin-A4 (LXA4) and annexin-A1 (ANXA1) inhibited LPS-induced M-CSF and MCP-1 production by human (HepG2) and mouse (H22) hepatocellular carcinoma cells (HCCs). The effects of LXA4, ANXA1, SAA and LL-37 were dependent on the activation of their mutual cell-surface receptor formyl peptide receptor-2 (FPR2) and subsequent ROS–MAPK–NF-kB signalings. Furthermore, our results indicated that LPS switched macrophages into an IL-10lowIL-12high M1 profile, whereas M-CSF+MCP-1 and FPR2 agonists skewed them into M2 (IL-10highIL-12low). In that respect, through modulating the phosphorylation of signal transducer and activator of transcription-3 (STAT3), LXA4 and ANXA1 induced monocyte differentiation into M2a+M2c-like cells and showed antitumorigenetic activities, whereas SAA, LL-37 and M-CSF+MCP-1 led to M2b- or M2d-like polarization, which exacerbated HCC invasion in vitro and in vivo, respectively. Our results suggest that FPR2 has an appreciable pleiotropic regulator role in tumor immunoediting." @default.
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- W1977492069 date "2011-04-18" @default.
- W1977492069 modified "2023-10-06" @default.
- W1977492069 title "Pleiotropic regulation of macrophage polarization and tumorigenesis by formyl peptide receptor-2" @default.
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- W1977492069 doi "https://doi.org/10.1038/onc.2011.112" @default.
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