Impact of Xuebijing injection on the expression of tumor necrosis factor α and high mobility group box 1 in rat peritoneal mesotheliai cells induced by lipopolysaccharide / 中华肾脏病杂志

ABSTRACT

Objective To observe the effect of Xuebijing injection on the expression of tumor necrosis factor-alpha (TNF-α) and high mobility group box-1 protein (HMGB-1) in rat peritoneal mesothelial cells (PMCs) induced by lipopolysaccharide (LPS). Methods PMCs were isolated from rat colic omentum and the 3rd generation cells were used in the experiment. PMCs were incubated with LPS at different concentrations (1,10,100 mg/L);with LPS (10 mg/L) for 2, 6, 12, 18, 21, 24, 36 h;with Xuebijing injection at different concentrations (2,10,20 g/L) after incubation with LPS (10 mg/L) for 2 h. PMCs in the control group were incubated with medium. HMGB-1 mRNA was detected by RT-PCR. TNF-α and HMGB-1 protein in supernatants was detected by ELISA. Results Compared to the control group, the expression of HMGB-1 mRNA and protein was significantly increased in groups stimulated by LPS in a time- and dose-dependent manner (all P<0.05);the expression of TNF-α was increased in the groups stimulated by LPS in a dose-dependent manner (P<0.05). In the groups stimulated by LPS (10 mg/L), the expression of TNF-α appeared double hump within 36 hours. Compared to LPS (10 mg/L) group, Xuebijing injection significantly inhibited the expression of HMGB-1 and TNF-α (all P<0.05 ) in a dose-dependent manner. Conclusions HMGB-1 as a late mediator of inflammatory responses may play a role in the pathogenesis of peritoneal dialysis related peritonitis. Xuebijing injection can reduce peritoneal inflammatory impairment by inhibiting the up-regulation of TNF-α and HMGB-1 induced by LPS.