期刊
ANTIBIOTICS-BASEL
卷 11, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/antibiotics11050607
关键词
antimicrobial; cytokines; inflammation; peptides; Salmonella enterica serovar Typhimurium
资金
- Direccion General de Asuntos del Personal Academico Universidad Nacional Autonoma de Mexico (DGAPA-UNAM) [IT200321]
- CONACyT [303045, 1002874, 700349]
The antimicrobial peptide Css54 showed inhibitory effects on the growth of Salmonella enterica serovar Typhimurium, while the recombinant chemokine MCP-1 did not. Css54 was also toxic to macrophages and activated macrophage phagocytosis, while MCP-1 was not. The combination of Css54 and MCP-1 increased the expression levels of IL-10 and TNF-alpha.
The antimicrobial and immunomodulatory capacities of the peptide Css54 and the chemokine MCP-1 were tested. The first, a peptide isolated from the venom of the scorpion Centruroides suffusus suffusus was synthesized chemically. In contrast, the second is a monocyte chemoattractant expressed as a recombinant protein in our lab. It was observed in vitro that Css54 inhibited the growth of Salmonella enterica serovar Typhimurium (6.2 mu g/mL). At high concentrations, it was toxic to macrophages (25 mu g/mL), activated macrophage phagocytosis (1.5 mu g/mL), and bound Salmonella LPS (3 mu g/mL). On the other hand, the recombinant MCP-1 neither inhibited the growth of Salmonella Typhimurium nor was it toxic to macrophages (up to 25 mu g/mL), nor activated macrophage phagocytosis or bound Salmonella LPS (up to 3 mu g/mL). Although it was observed in vivo in mice Balb/C that both Css54 and MCP-1 did not resolve the intraperitoneal infection by S. Typhimurium, Css54 decreased the expression of IL-6 and increased IL-10, IL-12p70, and TNF-alpha levels; meanwhile, MCP-1 decreased the expression of IFN-gamma and increased IL-12p70 and TNF-alpha. It was also observed that the combination of both molecules Css54 and MCP-1 increased the expression of IL-10 and TNF-alpha.
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