Chinese Hepatolgy ›› 2022, Vol. 27 ›› Issue (5): 570-572.

• Other Liver Diseases • Previous Articles     Next Articles

The diagnostic value of serum Cat S level in patients with primary biliary cholangitis

GAO Lin-lin, KONG Mi-cai, FENG Wei-hua   

  1. Department of Gastroenterology, Jiaozuo People′s Hospital, Henan 454000, China
  • Received:2021-07-20 Online:2022-05-31 Published:2022-07-13

Abstract: Objective To investigate the changes and diagnostic value of serum cathepsin S (Cat S) level in patients with primary biliary cholangitis (PBC). Methods A total of 135 patients with PBC and hepatitis B (HBV) who were admitted from June 2017 to October 2020 were selected and denoted as PBC group (75 cases) and HBV group (60 cases), respectively. The serum levels of total Cat S, pro-Cat S and active-Cat S were compared between the two groups of patients. Pearson correlation analysis was used to explore the correlation between serum Cat S and alkaline phosphatase (ALP), glutamyl transpeptidase (GGT), immunoglobulin G (IgG) and immunoglobulin M (IgM) in PBC patients. Rreceiver operating characteristic curve (ROC) was drawn and the area under the curve (AUC) was used to evaluate the diagnostic value of serum Cat S for PBC. Results The levels of ALP, GGT, IgG and IgM in the PBC group were (258.76±82.56) U/L, (258.76±82.56) U/L, (258.76±82.56) g/L, and (258.76±82.56) g/L, respectively,which were all higher than those of [(187.52±64.38), (215.33±76.21), (8.32±2.45), (2.53±1.05)] in the HBV group (t=14.310, 9.713, 8.016; all P<0.05). Similarly,serum levels of total Cat S, pro-Cat S and active-Cat S in the PBC group were (14.85±4.52) pg/L, (8.53±3.61) pg/L, and (6.32±1.87) pg/L, respectively, which were higher than those of [(5.26±2.85) pg/L, (3.82±1.15) pg/L, (1.44±0.75) pg/L] in the HBV group (t=5.481, 8.078, 10.098, 6.668; all P<0.05). Serum total Cat S level in PBC patients was positively correlated with ALP, GGT, IgG and IgM (r=0.625, 0.581, 0.681, 0.582, P<0.05). Concordancely, serum pro-Cat S level was positively correlated with ALP, GGT, IgG and IgM (r=0.764, 0.676, 0.753, 0.603, P<0.05). By ROC analysis it was shown that the best cut-off points for the diagnosis of PBC by serum total Cat S, pro-Cat S and active-Cat S were 8.79 pg/L, 5.88 pg/L, 3.16 pg/L, and the AUCs were 0.887, 0.644, 0.658, respectively. Conclusion The level of serum Cat S in patients with PBC is abnormally increased, and its diagnostic efficiency for PBC is high. Serum level of Cat S can be used as an important reference index for the diagnosis of PBC.

Key words: Primary biliary cholangitis, Serum cathepsin S, Cholestasis, Diagnosis