ABSTRACT
Objective:To investigate the changes of biomarkers in peritoneal dialysis patients' peritoneal drainage fluid and their relationship with the peritoneal small molecule solute transport rate (PSTR).Methods:Seventy newly-tubed peritoneal dialysis patients from the Peritoneal Dialysis Center of the First Teaching Hospital of Tianjin University of Traditional Chinese Medicine from September 29, 2014 to April 26, 2018 were selected. The levels of biomarkers plasminogen activator inhibitor-1 (PAI-1), matrix metalloproteinase-2 (MMP-2) and vascular endothelial growth factor (VEGF) in the peritoneal dialysis priming fluid were measured at different time points and 4 h dialysate/blood muscle (D/P) creatinine values at 2 years of follow-up, and the correlation between biomarkers in the extracted peritoneal fluid and 4 h D/P creatinine was examined.Results:Longitudinal studies showed an increase in PAI-1 ( P<0.001) and VEGF ( P=0.04) with increasing duration of peritoneal dialysis. PSTR levels at baseline and after 2 years of follow-up were significantly correlated with PAI-1, MMP-2, and VEGF levels at baseline. PSTR at 2 years was also correlated with MMP-2 levels at 6 months and PAI-1 levels at baseline. Conclusions:The biomarkers PAI-1, MMP-2, and VEGF in peritoneal dialysis drainage fluid are positively correlated with PSTR in peritoneal dialysis patients during the 2-year period.