目的   分析谷草转氨酶（AST）、胆碱酯酶（CHE）、糖类抗原125（CA125）以及甲胎蛋白（AFP）对肝硬化患者的诊断效能。方法   选择70例肝硬化患者为观察组研究对象，另取70例同期健康体检者为对照组。两组研究对象均接受生化检验、肿瘤标志物检验。对比两组研究对象的AST、CHE、CA125、AFP检测结果，分析上述指标对肝硬化患者的诊断效能。结果   观察组肝硬化患者的CHE低于对照组，AST、CA125与AFP高于对照组（P＜0.05）；AST与CHE在肝硬化诊断中具有良好的灵敏度、特异度；CA125联合AFP的灵敏度、特异度、符合率均高于CA125或AFP单独检验（P＜0.05）。结论  AST、CHE、CA125、AFP在肝硬化患者临床诊断中具有良好的应用表现，是反映患者肝硬化病情进展的重要参考指标。

     Objective  To analyze the diagnostic efficacy of aspartate aminotransferase（AST），cholinesterase（CHE），carbohydrate antigen 125（CA125），and alpha fetoprotein（AFP）in patients with liver cirrhosis．Methods  A total of 70 patients with liver cirrhosis were included in the observation group as the study subjects，and 70 healthy individuals who underwent physical examinations during the same period were selected as the control group．Both groups of  research subjects underwent biochemical testing and tumor marker testing．The AST，CHE，CA125，and AFP detection  results of two groups of research subjects were compared，and the diagnostic effect of the above indicators on patients with liver cirrhosis were analyzed．Results  The CHE test  results of patients with liver cirrhosis in the observation group were significantly lower than those of healthy individuals undergoing physical examination，and the AST，CA125，and AFP test results were higher（P＜0.05）．AST and CHE had good sensitivity and specificity in the diagnosis of liver cirrhosis．The sensitivity，specificity and coincidence  rate of CA125 combined with AFP were higher than those of CA125 or AFP alone．Conclusions  AST，CHE，CA125，and AFP have good clinical application performance in the diagnosis of liver cirrhosis patients，and are important reference indicators reflecting the progression of liver cirrhosis in patients．

       目的   探讨多梳蛋白SUZ12对肝细胞肝癌（HCC）细胞增殖、血管生成拟态形成和人脐静脉内皮细胞（HUVECs）血管生成的影响。方法 分别利用MTT比色法及体外血管生成实验检测SUZ12表达水平改变对HCC细胞SMMC-7721、Hep3B增殖、血管生成拟态形成和HUVECs血管生成的影响。结果  MTT结果显示，在HCC细胞中分别敲低或过表达SUZ12均对HCC细胞的增殖能力无明显影响。将SUZ12低表达HCC细胞与HUVECs共培养后，HCC细胞的血管生成拟态管样结构形成增多。此外，将SUZ12敲低组HCC细胞的培养上清用于培养HUVECs后，HUVECs的血管生成拟态管样结构形成也明显增多。结论  SUZ12对HCC细胞的增殖无影响，其在HCC中可抑制HCC细胞和HUVECs的血管生成拟态管样结构形成。上述结果提示SUZ12可能通过调控HCC细胞及HUVECs的血管生成发挥抑癌作用。

      Objective  To investigate the effects of SUZ12 on cell proliferation of hepatocellular carcinoma（HCC），vasculogenic mimicry formation and human umbilical vein endothelial cells（HUVECs）angiogenesis．Methods  MTT assay was performed to detect the proliferation of SMMC-7721 and Hep3B cells．The effects of SUZ12 on the angiogenesis of HCC cells and HUVECs cells were studied by in vitro angiogenesis experiment．Results  The result of MTT assay showed that SUZ12 knockdown or overexpression in HCC cells had no significant effect on the proliferation of HCC cells．We found that when HCC cells with low SUZ12 expression were co-cultured with HUVECs cells，the formation of vasculogenic mimicry tubular structures in HCC cells increased．In addition，we also found that after the culture supernatant of HCC cells in the SUZ12 knockdown group was used to culture HUVECs cells，the formation of vasculogenic mimicry tubular structures in HUVECs cells also increased significantly．Conclusions  SUZ12 has no effect on the proliferation of HCC cells，but it can inhibit the formation of vasculogenic mimicry tubular structures in HCC cells and HUVECs cells．These results suggest that SUZ12 plays a role in cancer inhibition by regulating the angiogenesis of HCCcells and HUVECs cells．