[Hyperosmotic glucose and antibiotics induce production of plasminogen activator inhibitor and expression of TGF beta mRNA by rat peritoneal mesothelial cells].

To investigate the mechanism of fibrosis in peritoneal dialysis, we observed the effects of the hyperosmotic glucose and antibiotics such as gentamicin and cefazolin on rat peritoneal mesothelial cells with cell culture, fibrin-plate lyzing and Northern blotting analysis method. The peritoneal mesothelial cells may express PAI-1 mRNA. The expression of PAI-1 mRNA in peritoneal mesothelial cells and activities of PAI in the supernatants were enhanced by 11.2 mmol/L glucose, gentamicin and cefazolin at 12 hr. By 24 hr, the activity of PAI-1 also increased in the supernatants with 11.2 mmol/L glucose. The expression of PAI-1 mRNA and production of PAI activities by the peritoneal mesothelial cells were increased by gentamicin, and the TGF-beta mRNA increased in the peritoneal mesothelial cells was induced by 11.2 mmol/L glucose, gentamicin and cefazolin. The results suggested that 11.2 mmol/L glucose, gentamicin and cefazolin may increase the expressions or productions of PAI and TGF-beta in peritoneal mesothelial cells. So by perosmotic glucose, cefazolin and gentamicin promote the peritoneal fibrosis in patients with CAPD.