Abstract: Abstract：Objective To observe changes of procalcitonin (PCT) level in cirrhosis patients complicated with hepatorenal syn⁃ drome (HRS). Methods Cirrhosis without HRS (Non-HRS group, n=115), cirrhosis with HRS (HRS group, n=28) and control group (40 cases) were enrolled. Levels of serum PCT, C-reactive protein (CRP), Cystatin-C (Cys-C), white blood count, percentage of neutro⁃ phils, serum creatinine and urine creatinine were examined in all participants. Correlation between serum PCT levels and incidence of HRS was analyzed. Correlations between serum PCT levels with CRP, Cys-C, 24 h-Creatinine clearance (24 h-Ccr) were analyzed. Re⁃ sults Among cirrhosis patients, those with increased PCT had higher chance of complication with HRS than those with normal PCT (P=0.026). Levels of serum PCT, CRP and Cys-C are higher in HRS Group than those in Non-HRS group，both which are higher than those incontrol group (P < 0.05); Level of 24 h-Ccr is lower in HRS Group than that in non-HRS group, both of which are lower than that in control group (P < 0.05). Levels of serum PCT positively correlated to levels of serum CRP and Cys-C but, negatively correlated to levels of 24 h-Ccr. Conclusion Serum PCT level contribute to early infection and renal damage in cirrhosis and might play an im⁃ portant role in development of HRS. It is valuable in giving early information of cirrhosis complicated with HRS.

Key words: hepatorenal syndrome, liver cirrhosis, calcitonin, procalcitonin, cystatin-C