PIVKAⅡ在肝细胞癌诊断中的价值

目的:由于维生素K缺乏或拮抗产生的异常蛋白(PIVKAⅡ),又称为γ-羧基凝血素,是近年来在日本及美国诊断肝细胞癌(HCC)的敏感指标,但至今仍未用于中国临床。本研究的目的是评价PIVKAⅡ在中国肝癌患者诊断中的意义。方法:检测60例HCC和30例排除肝癌的肝硬化患者血清中PIVKAⅡ和甲胎球蛋白(AFP)水平。结果:在HCC患者中,血清PIVKAⅡ的浓度为784.3±1364.1,显著高于肝硬化患者的16.1±31.7(P<0.001)。当将PIVKAⅡ的临界值定为40mAU/ml时,51.7％肝癌患者(31/60)的PIVKAⅡ值高于该临界值(灵敏度);但仅13.3％肝硬化患者PIVKAⅡ值高于此临界值。该指标的特异性为86.7％(26/30);精确度为62.2％(31+26/60+30);其中36.84％的小HCC患者(7/19)的PIVKAⅡ值高于此临界值。在26例AFP阴性的肝癌患者中,有11例(46.2%)PIVKAⅡ值高于该临界值;肝癌患者的AFP和PIVKAⅡ水平未见显著相关(r=0.101,P=0.247)。PIVKAⅡ和AFP联合使用较AFP单独使用灵敏度升高21.6％,较PIVKAⅡ单独使用灵敏度升高26.7%;对小肝癌患者,则分别升高15.8％和21.1％。结论:PIVKAⅡ是对肝癌诊断的敏感指标,如果与AFP结合使用,其敏感性更高。

The Diagnostic Value of the Des- gamma Carboxy Prothrombic Caused by the Vitamin K Absence in the Hepatic Carcinom

Purpose: Protein induced by vitamin K absence or antagonist a! (PIVKA a! ), also called des-gamma carboxy prothrombin(DCP), is a sensitive marker for the diagnosis of hepatocellular carcinoma (HCC), in Japan and the United States. PIVKA a! is not used in clinical diagnosis in China so far. The aim of this study was to assess the diagnostic value of PIVKA a! in Chinese patients with HCC. Methods: Serum PIVKA a! and alpha-fetoprotein(AFP) levels were determined in 60 patients with HCC and 30 patients with cirrhosis not carrying HCC. Results: The mean serum concentration of PIVKA a! in HCC pa-tients(784.3