Chinese Journal Of Clinical Anatomy ›› 2019, Vol. 37 ›› Issue (1): 55-59.doi: 10.13418/j.issn.1001-165x.2019.01.012

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Effects of vasoactive intestinal peptide on the function of triggering receptor expressed on myeloid cells-1 in RAW264.7 murine macrophages

SONG Zhuo-hui, LI Shu-fen, LIU Yan, YUAN Li, HAN Ling-na, ZHANG Cui-ying   

  1. Department of Physiology, Changzhi Medical College, Changzhi 046000, Shanxi Province, China
  • Received:2018-09-11 Online:2019-01-25 Published:2019-02-20

Abstract:

Objective To observe the effect of vasoactive intestinal peptide (VIP) on the function of triggering receptor expressed on myeloid cells-1  (TREM-1) in mouse macrophages. Methods The mouse macrophage cell line RAW264.7 was used as the research object. After cells were seeded on the culture plates, TREM-1 was activated by the monoclonal agonistic antibody of TREM-1, and cells in the VIP pretreatment group was treated with 10 nM VIP. After 1 h, the intracellular PLC-γ phosphorylation and intracellular reactive oxygen species (ROS) were detected by Western blot and DCFH-DA, respectively. After 6 h, real-time PCR was used to detect the gene expression of tumor necrosis factor-α (TNF-α) and monocyte chemoattractant protein-1 (MCP-1) as the downstream target genes of TREM-1 activation. After 12 h, TNF-α and MCP-1 contentration in the cell culture supernatants were detected by ELISA.   Results  After treatment of TREM-1 monoclonal agonistic antibody, the intracellular PLC-γ phosphorylation level, ROS content, and mRNA and protein levels of TNF-α and MCP-1 were significantly increased in murine macrophages, while VIP pretreatment significantly inhibited the above reactions induced by monoclonal agonistic antibodies.   Conclusion  VIP can inhibit the functional changes induced by the activation of TREM-1 in murine macrophages RAW264.7, thereby exerting anti-oxidant and anti-inflammatory effects.

Key words: Vasoactive intestinal peptide,  Triggering receptor expressed on myeloid cells-1, Macrophages,  Inflammation