Laboratory Medicine ›› 2019, Vol. 34 ›› Issue (12): 1072-1076.DOI: 10.3969/j.issn.1673-8640.2019.12.003

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Establishment the reference interval of adult protein-induced vitamin K absence/antagonist Ⅱ by chemiluminescent microparticle immunoassay

TANG Jie1, YANG Yuwei1, WANG Kun2, YU Jing2()   

  1. 1. Department of Clinical Laboratory,Mianyang Central Hospital,Mianyang 621000,Sichuan,China
    2. Department of Clinical Laboratory,Hubei Cancer Hospital,Wuhan 430079,Hubei,China
  • Received:2018-04-11 Online:2019-12-30 Published:2020-01-03

Abstract:

Objective To establish the reference interval of adult protein-induced vitamin K absence/antagonist Ⅱ(PIVKA-Ⅱ) in Mianyang by chemiluminescent microparticle immunoassay(CMIA),and to investigate the change of PIVKA-Ⅱ levels in patients with viral hepatitis,cirrhosis and hepatocellular carcinoma(HCC). Methods Serum PIVKA-Ⅱ levels were determined by CMIA in 674 healthy subjects,147 viral hepatitis patients,90 cirrhosis patients and 98 HCC patients. The reference interval of PIVKA-Ⅱwas established by x±1.96s. The diagnostic efficiency of PIVKA-Ⅱto viral hepatitis,cirrhosis and HCC was evaluated by receiver operating characteristic(ROC) curve. Results The results of serum PIVKA-Ⅱ determination of 674 healthy subjects showed approximate normal distribution(z=1.428,P=0.034),and there was no statistical significance between males and females(P>0.05). The subjects were classified according to ages(18-30-year-old,31-44-year-old,45-59-year-old,60-69-year-old and ≥70-year-old groups),and there was no statistical significance in these groups(P>0.05). The data were merged,and the reference interval established by x±1.96s was 8.75-36.72 U/L. Compared to healthy control group,serum PIVKA-Ⅱ levels in viral hepatitis group,cirrhosis group and HCC group increased(P<0.001). Serum PIVKA-Ⅱ levels in HCC group were higher than those in viral hepatitis group and cirrhosis group(P<0.001),and there was no statistical significance between viral hepatitis group and cirrhosis group(P>0.05). By ROC curve analysis,the areas under curve(AUC) of serum PIVKA-Ⅱ for viral hepatitis,cirrhosis and HCC were 0.656,0.663 and 0.900,and the optimal cut-off values were 27.27,29.86 and 40.36 U/L,the sensitivities were 49.7%,52.2% and 80.6%,and the specificities were 75.7%,80.8% and 94.5%,respectively. Conclusions The reference interval of serum adult PIVKA-Ⅱ by CMIA in Mianyang has preliminarily been established. PIVKA-Ⅱ increases in various degrees in patients with non-liver cancer,such as viral hepatitis and cirrhosis,and it should not be used alone as a marker of HCC.

Key words: Protein-induced vitamin K absence/antagonist Ⅱ, Reference interval, Chemiluminescent microparticle immunoassay, Hepatocellular carcinoma

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