目的:联合应用cDNA微阵列和组织微阵列技术并采用计算机辅助处理技术研究正常胰腺组织、MAP、SAP之间基因表达谱,筛选出MAP与正常粘膜以及MAP与SAP之间的差异表达基因。方法:分别抽提正常胰腺组织、MAP和SAP组织的总RNA并纯化mRNA;将各m...目的:联合应用cDNA微阵列和组织微阵列技术并采用计算机辅助处理技术研究正常胰腺组织、MAP、SAP之间基因表达谱,筛选出MAP与正常粘膜以及MAP与SAP之间的差异表达基因。方法:分别抽提正常胰腺组织、MAP和SAP组织的总RNA并纯化mRNA;将各mR-NA逆转录合成以Cy5和Cy3标记的cDNA一链做探针,分别混合后在3张含有4096条双点人类全长基因的芯片上进行杂交。用ScanArray 4000扫描芯片荧光信号图像,用GenePix Pro 3.0软件对扫描图像进行数字化处理和分析。结果3次杂交出现一致性显著异常,表达差异在2倍以上的基因有141条,其中表达上调的74条,表达下调的67条。结论通过基因表达谱差异的比较,提示MAP和SAP在基因水平存在差异,差异2倍以上的141个基因可能与AP的发生和发展以及相关早期炎症的启动和演化有关。展开更多
AIM: To conduct a retrospective study in 400 chronic hepatitis B patients in order to identify hepatitis B viral factors associated with complications of liver disease or development of hepatocellular carcinoma. METH...AIM: To conduct a retrospective study in 400 chronic hepatitis B patients in order to identify hepatitis B viral factors associated with complications of liver disease or development of hepatocellular carcinoma. METHODS: The mean follow-up time was 83.6 ± 39.6 mo. Alpha-fetoprotein test and abdominal ultrasound were used for cancer surveillance. Hepatitis B basal core promoter mutants, precore mutants, genotypes, hepatitis B viral DNA (HBV DNA) level and hepatitis B e antigen (HBeAg) were measured. Univariate analysis and logistic regression were used to assess odds ratios for viral factors related to liver deaths and hepatocellular carcinoma development. RESULTS: During follow-up, 38 patients had liver deaths not related to hepatocellular carcinoma. On multivariate analysis, older age [odds ratio: 95.74 (12.13-891.31), P 〈 0.0001], male sex [odds ratio: 7.61 (2.20-47.95); P = 0.006], and higher Iogzo HBV DNA [odds ratio: 4.69 (1.16-20.43); P 〈 0.0001] were independently predictive for these liver related deaths. Also, 31 patients developed hepatocellular carcinoma. Multivariate analysis showed that older age [odds ratio: 26.51 (2.36-381.47); P = 0.007], presence of precore mutants [odds ratio: 4.23 (1.53-19.58), P = 0.02] and presence of basal core promoter mutants [odds ratio: 2.93 (1.24-7.57); P = 0.02] were independent predictors for progression to hepatocellular carcinoma. CONCLUSION: Our results show that high levels of baseline serum HBV DNA are associated with non- hepatocellular carcinoma-related deaths of liver failure, while genetic mutations in the basal core promoter and precore regions are predictive for development of hepatocellular carcinoma.展开更多
文摘目的:联合应用cDNA微阵列和组织微阵列技术并采用计算机辅助处理技术研究正常胰腺组织、MAP、SAP之间基因表达谱,筛选出MAP与正常粘膜以及MAP与SAP之间的差异表达基因。方法:分别抽提正常胰腺组织、MAP和SAP组织的总RNA并纯化mRNA;将各mR-NA逆转录合成以Cy5和Cy3标记的cDNA一链做探针,分别混合后在3张含有4096条双点人类全长基因的芯片上进行杂交。用ScanArray 4000扫描芯片荧光信号图像,用GenePix Pro 3.0软件对扫描图像进行数字化处理和分析。结果3次杂交出现一致性显著异常,表达差异在2倍以上的基因有141条,其中表达上调的74条,表达下调的67条。结论通过基因表达谱差异的比较,提示MAP和SAP在基因水平存在差异,差异2倍以上的141个基因可能与AP的发生和发展以及相关早期炎症的启动和演化有关。
文摘AIM: To conduct a retrospective study in 400 chronic hepatitis B patients in order to identify hepatitis B viral factors associated with complications of liver disease or development of hepatocellular carcinoma. METHODS: The mean follow-up time was 83.6 ± 39.6 mo. Alpha-fetoprotein test and abdominal ultrasound were used for cancer surveillance. Hepatitis B basal core promoter mutants, precore mutants, genotypes, hepatitis B viral DNA (HBV DNA) level and hepatitis B e antigen (HBeAg) were measured. Univariate analysis and logistic regression were used to assess odds ratios for viral factors related to liver deaths and hepatocellular carcinoma development. RESULTS: During follow-up, 38 patients had liver deaths not related to hepatocellular carcinoma. On multivariate analysis, older age [odds ratio: 95.74 (12.13-891.31), P 〈 0.0001], male sex [odds ratio: 7.61 (2.20-47.95); P = 0.006], and higher Iogzo HBV DNA [odds ratio: 4.69 (1.16-20.43); P 〈 0.0001] were independently predictive for these liver related deaths. Also, 31 patients developed hepatocellular carcinoma. Multivariate analysis showed that older age [odds ratio: 26.51 (2.36-381.47); P = 0.007], presence of precore mutants [odds ratio: 4.23 (1.53-19.58), P = 0.02] and presence of basal core promoter mutants [odds ratio: 2.93 (1.24-7.57); P = 0.02] were independent predictors for progression to hepatocellular carcinoma. CONCLUSION: Our results show that high levels of baseline serum HBV DNA are associated with non- hepatocellular carcinoma-related deaths of liver failure, while genetic mutations in the basal core promoter and precore regions are predictive for development of hepatocellular carcinoma.