INTRODUCTIONIn order to study the relationship between oncogeneexpression and HCC generation,we observed theprecancerous hepatic GGT loci,IGF-Ⅱ,p53 andp21 expression during hepatocarcinogenesis of treeshrew induced b...INTRODUCTIONIn order to study the relationship between oncogeneexpression and HCC generation,we observed theprecancerous hepatic GGT loci,IGF-Ⅱ,p53 andp21 expression during hepatocarcinogenesis of treeshrew induced by hepatitis B virus (HBV) and/oraflatoxin B1 (AFB1).展开更多
AIM: To study the expression and serum level of HBxAg,Fas and FasL in tissues of HCC patients, and to assess the relationship between HBxAg and Fas/FasL system.METHODS: Tissues from 50 patients with HCC were tested fo...AIM: To study the expression and serum level of HBxAg,Fas and FasL in tissues of HCC patients, and to assess the relationship between HBxAg and Fas/FasL system.METHODS: Tissues from 50 patients with HCC were tested for the expression of HBxAg, Fas and FasL by S-P immunohistochemistry. Serum levels of sFas/sFasL and HBsAg/HBeAg were measured by ELISA assay. HBV X gene was detected by PCR in serum and confirmed by automatic sequencing. Fifty cases of liver cirrhosis and 30 normal controls were involved in serum analysis.RESULTS: The expression of HBxAg, Fas and FasL in carcinoma tissues was 96 %, 84 % and 98 %, respectively.Staining of HBxAg, Fas and FasL was observed predominately in cytoplasms, no significant difference was found in intensity between HBxAg, Fas and FasL (P＞0.05). HBxAg, Fas and FasL might express in the same area of carcinoma tissues and this co-expression could be found in most patients with HCC. The mean levels of sFas in serum from HCC, cirrhosis and normal controls were 762.29±391.56 μg@ L-1 835.36±407.33 μg@L-1 and 238.27±135.29 μg@L-1. The mean levels of sFasL in serum from HCC, cirrhosis and normal controls were 156.36±9.61iμg@ L-1, 173.63±18.74 μg@L-1 and 121.96±7.83 μg@ L-1.Statistical analysis showed that both sFas and sFasL in HCC and cirrhosis patients were significantly higher than those in normal controls (P＜0.01). Serum HBV X gene was found in 32 % of HCC patients and ,46 % of cirrhotic patients.There was no significant relationship between serum level of sFas/sFasL and serum X gene detection (P＞0.05). Eight percent of HCC patients with negative HBsAg and HBeAg in serum might have X gene in serum and HBxAg expression in carcinoma tissues.CONCLUSION: Our data suggest that HBxAg and Fas/FasL system plays an important role in the development of human HCC. Expression of HBxAg can leads to expression of Fas/FasL system which and reverse apoptosis of hepatocellular carcinoma induced by FasL.展开更多
慢性乙型肝炎病毒(Hepatitis B virus,HBV)感染是全世界关注的公共卫生问题。我国是乙肝高流行区,每年约有150万乙肝病毒携带者分娩,近半数胎儿通过母婴垂直传播感染乙肝。由于婴幼儿期感染乙肝后形成的免疫耐受,往往成为慢性甚至终身...慢性乙型肝炎病毒(Hepatitis B virus,HBV)感染是全世界关注的公共卫生问题。我国是乙肝高流行区,每年约有150万乙肝病毒携带者分娩,近半数胎儿通过母婴垂直传播感染乙肝。由于婴幼儿期感染乙肝后形成的免疫耐受,往往成为慢性甚至终身携带者,逐渐发展为肝硬化、肝癌。近年来的研究发现,PI3-Akt信号通路与妊娠生及或病理过程关系密切,在感染HBV的胎盘组织中发现PI3K-Akt信号通路中相关蛋白表达异常增高,且HBx Ag干扰该通路调节凋亡功能。推断HBx Ag通过调节PI3K-Akt信号通路活性影响胎盘功能,是HBV宫内感染的一种重要分子机制。为今后阻断HBV宫内感染提供新的研究方向。展开更多
基金the National Natural Science Foundation of China,No.39260033.
文摘INTRODUCTIONIn order to study the relationship between oncogeneexpression and HCC generation,we observed theprecancerous hepatic GGT loci,IGF-Ⅱ,p53 andp21 expression during hepatocarcinogenesis of treeshrew induced by hepatitis B virus (HBV) and/oraflatoxin B1 (AFB1).
基金the Science Foundation of Fujian Province,No.99-Z-162
文摘AIM: To study the expression and serum level of HBxAg,Fas and FasL in tissues of HCC patients, and to assess the relationship between HBxAg and Fas/FasL system.METHODS: Tissues from 50 patients with HCC were tested for the expression of HBxAg, Fas and FasL by S-P immunohistochemistry. Serum levels of sFas/sFasL and HBsAg/HBeAg were measured by ELISA assay. HBV X gene was detected by PCR in serum and confirmed by automatic sequencing. Fifty cases of liver cirrhosis and 30 normal controls were involved in serum analysis.RESULTS: The expression of HBxAg, Fas and FasL in carcinoma tissues was 96 %, 84 % and 98 %, respectively.Staining of HBxAg, Fas and FasL was observed predominately in cytoplasms, no significant difference was found in intensity between HBxAg, Fas and FasL (P＞0.05). HBxAg, Fas and FasL might express in the same area of carcinoma tissues and this co-expression could be found in most patients with HCC. The mean levels of sFas in serum from HCC, cirrhosis and normal controls were 762.29±391.56 μg@ L-1 835.36±407.33 μg@L-1 and 238.27±135.29 μg@L-1. The mean levels of sFasL in serum from HCC, cirrhosis and normal controls were 156.36±9.61iμg@ L-1, 173.63±18.74 μg@L-1 and 121.96±7.83 μg@ L-1.Statistical analysis showed that both sFas and sFasL in HCC and cirrhosis patients were significantly higher than those in normal controls (P＜0.01). Serum HBV X gene was found in 32 % of HCC patients and ,46 % of cirrhotic patients.There was no significant relationship between serum level of sFas/sFasL and serum X gene detection (P＞0.05). Eight percent of HCC patients with negative HBsAg and HBeAg in serum might have X gene in serum and HBxAg expression in carcinoma tissues.CONCLUSION: Our data suggest that HBxAg and Fas/FasL system plays an important role in the development of human HCC. Expression of HBxAg can leads to expression of Fas/FasL system which and reverse apoptosis of hepatocellular carcinoma induced by FasL.
文摘慢性乙型肝炎病毒(Hepatitis B virus,HBV)感染是全世界关注的公共卫生问题。我国是乙肝高流行区,每年约有150万乙肝病毒携带者分娩,近半数胎儿通过母婴垂直传播感染乙肝。由于婴幼儿期感染乙肝后形成的免疫耐受,往往成为慢性甚至终身携带者,逐渐发展为肝硬化、肝癌。近年来的研究发现,PI3-Akt信号通路与妊娠生及或病理过程关系密切,在感染HBV的胎盘组织中发现PI3K-Akt信号通路中相关蛋白表达异常增高,且HBx Ag干扰该通路调节凋亡功能。推断HBx Ag通过调节PI3K-Akt信号通路活性影响胎盘功能,是HBV宫内感染的一种重要分子机制。为今后阻断HBV宫内感染提供新的研究方向。
