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Objective:To investigate the expression of zinc finger protein 22 (ZNF22) gene in hepatocellular carcinoma (HCC) and its effect on tumor proliferation, apoptosis, invasion and metastasis of HCC.Methods:The expression of ZNF22 in 32 HCC specimens, and 371 HCC samples from the cancer genome atlas database were analyzed. ZNF22 knockdown and negative control SNU-449 and JHH-7 HCC cell lines were constructed. The effects of ZNF22 on HCC cells were observed by cell proliferation assay, plate clone formation assay, apoptosis assay, scratch healing assay, Transwell invasion assay, subcutaneous tumor formation, tail vein injection transfer, and small animal live imaging assay in nude mice.Results:The expression of ZNF22 gene is higher in HCC tissues than in paracellular carcinoma tissues, and the difference was statistically significant ( P<0.001). The growth rate of SNU-449 and JHH-7 cells in ZNF22 knockdown group was lower than that in control group, and the difference was statistically significant ( P<0.001). Compared with negative control group, the clone number formed by SNU-449 cells in ZNF22 knockdown group decreased (26±8 vs. 59±5, P<0.01), the level of apoptosis increased (6.60%±0.22% vs. 2.38%±0.30%, P<0.001), the migration rate decreased (14.47%±6.42% vs. 68.84%±8.01%, P<0.001), and the number of invasive cells decreased (48.00±2.23 vs. 179.00±4.81, P<0.001). There was no obvious tumor growth after subcutaneous injection of JHH-7 cells into nude mice in ZNF22 knockdown group, and the systemic fluorescence expression was lower than that of the negative control group, and the difference was statistically significant ( P<0.05). No metastases were observed on autopsy in knockdown group nude mice. Conclusion:ZNF22 is highly expressed in HCC while knockdowing ZNF22 gene inhibited the growth, proliferation, invasion, metastasis of HCC cells, and induced apoptosis of HCC cells.
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ObjectiveTo investigate the expression of the neutral cholesterol ester hydrolase 1 (NCEH1) gene in liver cancer tissue and human hepatoma cell lines and the effect of NCEH1 gene knockdown on the proliferation, apoptosis, invasion, and metastasis abilities of human hepatoma SMMC-7721 cells. MethodsLiver cancer tissue samples and adjacent tissue samples were collected from 32 patients with liver cancer who underwent surgical treatment in Guangzhou Red Cross Hospital Affiliated to Jinan University from January 2013 to June 2019, and quantitative real-time PCR was used to measure the relative expression level of the NCEH1 gene. Gene expression data of liver cancer samples up to September 2020 were downloaded from the ICGC database, and R software was used to analyze the data and obtain the expression level of the NCEH1 gene in each sample. The paired Wilcoxon signed-rank test and the Wilcoxon rank-sum test were used to investigate the differences between liver cancer tissue and adjacent tissue. Quantitative real-time PCR was used to measure the expression level of the NCEH1 gene in human hepatoma SMMC-7721, Bel-7402, HepG2, and Hep3B cells and normal human HL7702 liver cells. The lentivirus-mediated small interfering RNA (siRNA) technique was used to establish a human hepatoma SMMC-7721 cell line with NCEH1 gene knockdown, and the cells were divided into NCEH1 knockdown group (KD group) and negative control group (NC group); quantitative real-time PCR was used to measure the knockdown efficiency of the NCEH1 gene, and then MTT assay, flow cytometry with Annexin V-APC single staining, wound healing assay, Transwell assay, and Transwell chamber invasion assay were used to measure the proliferation, apoptosis, metastasis, and invasion abilities of SMMC-7721 cells in both groups. The t-test was used for statistical analysis of data between the two groups. ResultsThe mean expression level of the NCEH1 gene in liver cancer tissue was significantly higher than that in adjacent tissue (specimens from our hospital: Z=2.263, P=0.024; ICGC database: U=18 768, P＜0.001). SMMC-7721 cell line with moderate potential of invasion and metastasis had the highest expression level of the NCEH1 gene, followed by BEL-7402 and HepG2 cell lines with low potential of invasion and metastasis, and Hep3B cell line without the potential of invasion and metastasis had the lowest expression level. The KD group had a significantly lower expression level of the NCEH1 gene than the NC group (t=11.578, P=0000 3), and the knockdown efficiency of the NCEH1 gene was as high as 74.0%. Compared with the NC group, the KD group had a significant reduction in cell growth rate, a significant increase in apoptosis rate, and significant reductions in migration rate and the number of metastatic and invasive cells (t=32.100, 27.303, 9.51, 38.123, and 22.331, all P＜0.001). Conclusion There is a significant increase in the expression of the NCEH1 gene in liver cancer tissue and cell lines, and the NCEH1 gene can promote the growth, proliferation, invasion, and metastasis of hepatoma cells and inhibit their apoptosis, suggesting that it may be a potential therapeutic target for liver cancer.
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ObjectiveTo systematically review the clinical effect of mesohepatectomy versus hemihepatectomy in the treatment of centrally located hepatocellular carcinoma (HCC). MethodsPubMed, EMBASE, Cochrane Library, CKNI, Wanfang Data, and VIP were searched for comparative studies on mesohepatectomy versus hemihepatectomy in the treatment of centrally located HCC. Related data were extracted, including time of operation, intraoperative blood loss, number of patients with postoperative liver failure, mortality rate in the perioperative period, overall survival rate, and disease-free survival rate, and Review Manager 5.3 software was used for data analysis. The chi-square test was used to evaluate the heterogeneity between these studies. Odds ratio (OR) was used for the analysis of binary variables, weighted mean difference (WMD) was used for the analysis of continuous variables, and 95% confidence interval (CI) was calculated for these variables. ResultsA total of 10 retrospective case-control studies which met the inclusion criteria were included, with a total sample size of 1861 patients (1054 in the mesohepatectomy group and 807 in the hemihepatectomy group). The meta-analysis revealed that the mesohepatectomy group had a significantly lower incidence rate of postoperative liver failure than the hemihepatectomy group (OR=037, 95%CI: 0.16-0.87, P=0.02), while there were no significant differences between the two groups in time of operation (WMD=15.17, 95%CI: -18.75 to 49.05, P=0.38), intraoperative blood loss (WMD=100.96, 95%CI: -15.29 to 217.21, P=0.09), mortality rate in the perioperative period (OR=0.55, 95%CI: 0.26-1.17, P=0.12), incidence rate of bile leakage after surgery (OR=1.32, 95%CI: 0.74-2.38, P=0.35), overall survival rate, and disease-free survival rate. ConclusionMesohepatectomy can significantly reduce the risk of postoperative liver failure. For patients with centrally located HCC and liver cirrhosis, experienced surgeons may give priority to mesohepatectomy.
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<p><b>OBJECTIVE</b>To explore the expression pattern of Mus81 gene in Chinese Han patients with colorectal cancer and analyze its correlation with the clinicopathological parameters and the tumor markers.</p><p><b>METHODS</b>Mus81 expression was detected using nested quantitative real-time PCR in the colorectal cancer tissues and corresponding adjacent normal tissues from 43 Chinese Han patients. The correlations of Mus81 expression profile with the clinicopathological parameters and common tumor markers were evaluated.</p><p><b>RESULTS</b>Mus81 expression level was significantly lower in the colorectal cancer tissues than in the corresponding adjacent normal tissues (114.6 ± 68.0 vs 202.5 ± 109.0, P<0.001). Of the 43 patients, 32 (74.4%) showed down-regulated Mus81 expression, which correlated significantly with distant metastasis (P=0.043), high TNM stage (P=0.022) and high P53 protein expression (P=0.011) of the tumor.</p><p><b>CONCLUSION</b>Down-regulation of Mus81 in colorectal cancer is correlated with tumor metastasis and progression, suggesting the value of Mus81 as a potential marker for colorectal cancer in Chinese Han patients.</p>