1.Rapid Determination of Methanol and Ethanol in Human Plasma by Head Space Gas Chromatography
Hongying MA ; Jian LUO ; Pingsheng XU ; Kangnian QIAN ; Bina LI
China Pharmacy 2001;0(10):-
OBJECTIVE:To establish a HS-GC method for determining methanol and ethanol in human plasma METHOD_S:An external standard method was used The stationary phase was a glass column packed with GDX-102 The carrier gas was nitrogen The column temperature was 140℃ and both the injector temperature and the detector temperature were 200℃ RE_SULTS:A good linearity was obtained in the range of 0 2~7 5g/L of methanol and ethanol The within-day RSD was less than 4% and the between-day RSD less than 5 5% The recoveries were (100 9?3 8)% for methanol,(101 5?3 4)% for et_hanol,respectively The limits of detection for both methanol and ethanol were less than 0 01g/L CONCLUSION:This method is simple,rapid and precise
2.Clinical significance of CCDC137 gene expression in hepatocellular carcinoma tissues and its effect on the proliferation, migration and invasion of MHCC97H cells
WANG Qianwena ; LI Wenhuaa ; WANG Xiaofanga ; GENG Yuqinga ; ZHAO Bina ; WU Xiangweia,b ; CHEN Xuelinga
Chinese Journal of Cancer Biotherapy 2022;29(10):904-910
[摘 要] 目的:分析卷曲螺旋结构域蛋白137(CCDC137)基因在肝细胞癌(HCC)组织中的表达及其与患者临床病理特征和预后的关系,探讨敲低CCDC137基因对肝癌MHCC97H细胞增殖、迁移及侵袭的影响。方法:从癌症基因组图谱(TCGA)数据库下载HCC数据集,获得CCDC137基因表达谱和临床资料信息,利用生物信息学方法分析CCDC137基因在HCC组织中的表达水平与患者临床病理指标的相关性以及对预后的影响;用基因集富集分析(GSEA)预测CCDC137基因在HCC中可能调控的信号通路,用Kaplan-Meier法及Log-Rank检验进行生存分析,并运用Cox比例风险回归模型分析影响患者预后的危险因素。采用小干扰RNA技术抑制肝癌MHCC97H细胞中CCDC137基因的表达,用qPCR法、WB法、CCK-8法及Transwell实验分别检测干扰后细胞CCDC137 mRNA和蛋白表达及其对细胞增殖、迁移和侵袭能力的影响。结果:在TCGA数据库检索到的371例HCC患者中,CCDC137 mRNA表达水平显著高于癌旁组织(P<0.01),其高表达与肿瘤组织学分级、癌组织分期、T分期等存在显著关联(OR=0.014、0.007、0.047,均P<0.05),CCDC137高表达的患者OS明显低于CCDC137基因低表达的患者(P<0.05),多因素Cox回归分析提示CCDC137基因可作为HCC患者的独立预后因子。GSEA结果发现,CCDC137基因高表达的样本存在碱基切除修复和剪接体等多个通路基因集的富集(P<0.01,FDR<0.05)。敲低CCDC137基因后,MHCC97H细胞的增殖、迁移和侵袭能力均显著降低(均P<0.01)。结论:CCDC137基因在HCC组织中高表达,其高表达与HCC的发生发展及预后不良有关。敲低CCDC137基因表达抑制MHCC97H细胞的增殖、迁移和侵袭能力。