Effects of TREM-1 gene silencing on lipopolysaccharide-induced inflammatory factor secretion from mice macrophage cell lines RAW264.7
- Author:
Hai-Peng ZOU
1
Author Information
- Publication Type:Journal Article
- Keywords: Interleukin 1β(IL-1β); Lipopolysaccharide (LPS); Mice macrophage; Small interfering RNA (siRNA); Striggering receptor expressed on myeloid cells-1 (TREM-1); Tumor necrosis factor α(TNF-α)
- From: Chinese Pharmaceutical Journal 2013;48(9):695-699
- CountryChina
- Language:Chinese
- Abstract: OBJECTIVE: To investigate the role of TREM-1 in tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) secretion from lipopolysaccharide-induced mice macrophage cell lines RAW264.7. METHODS: Designing and synthesizing small interfering RNA (siRNA) with high intangerference ratio, then constructing pLKO1.1-puro-TREM-1 The mice macrophage cell lines RAW264.7 were divided into four groups: control group (control); lipopolysaccharide group (LPS); empty plasmid group (pLKO1.1) - just transfected with pLKO1.1; interference group (siRNA) - transfected with pLKO1.1-puro-TREM1.24 h after stimulation with LPS, real-time PCR was used to detect the mRNA levels of TREM-1, TNF-α and IL-1β respectively. The concentrations of TNF-α and IL-1β were assayed by ELISA. RESULTS: In siRNA group, the mRNA levels of TREM-1, TNF-α and IL-1β were decreased significantly (P<0.01): moreover, the concentrations of TNF-α and IL-1β were lower than other groups significantly (P<0.01). CONCLUSION: Small interfering RNA may reduce TNF-α, IL-1β secretion in LPS-induced macrophage 264.7 through inhibiting the expression of TREM-1 gene.
