Effect of serum (open columns) and peritoneal fluid (filled columns) on collagen production in supernatant of cultured MeT-5A cells. Columns are means of eight repeated experiments; bars, SD. N, normal volunteers; CAPD, patients on peritoneal dialysis without peritonitis; CAPDP, patients on peritoneal dialysis with peritonitis; uremic/non-CAPD, uremic patients on conservative treatment. *, P < 0.05 versus N, CAPD, and CAPDP + anti-HGF antibody; #, P < 0.001 versus uremic/non-CAPD, CAPD, and CAPDP + anti-HGF antibody.