AIM： To characterize the tumor suppressor gene P53 mutations and study the correlation of P53 gene mutation and the expression of P53 protein in cholangiocarcinoma. METHODS： A total of 36 unselected, frozen samples ...AIM： To characterize the tumor suppressor gene P53 mutations and study the correlation of P53 gene mutation and the expression of P53 protein in cholangiocarcinoma. METHODS： A total of 36 unselected, frozen samples of cholangiocarcinoma were collected, p53 gene status（exon 5-8） and P53 protein were examined by automated sequencing and immunohistochemical staining, combined with the clinical parameters of patients. RESULTS： P53 gene mutations were found in 22 of 36 （61.1%） patients. Nineteen of 36 （52.8%） patients were positive for P53 protein expression. There were significant differences in extent of differentiation and invasion between the positive and negative expression of P53 protein. However, there were no significant differences in pathologic parameters between the mutations and non-mutations. CONCLUSION： The alterations of the P53 gene evaluated by DNA sequence analysis is relatively accurate. Expression of P53 protein could not act as an independent index to estimate the prognosis of cholangiocarcinoma.展开更多
The aim of this study was to investigate an association between the development of cholangiocarcinoma(CCA)and the ABO variant rs505922(known to increase pan-creatic cancer risk)in a large cohort of European individual...The aim of this study was to investigate an association between the development of cholangiocarcinoma(CCA)and the ABO variant rs505922(known to increase pan-creatic cancer risk)in a large cohort of European individuals with CCA.In total,180 individuals with CCA and 350 CCA-free controls were included.The ABO variant rs505922 was genotyped using a polymerase chain reaction-based assay.Association between this single nucleotide polymorphism(SNP)and CCA was tested in contingency tables.Neither allele distributions nor association tests and regression analysis provided evidence for an increased risk of CCA among carriers of the ABO variant(all P > 0.05).Nevertheless,we documented a deviation from Hardy-Weinberg equilibrium in the entire CCA cohort(P = 0.028)and for patients with intrahe-patic(P = 0.037)but not extrahepatic tumor localization(P > 0.05).The association tests did not provide evidence for a prominent role of the investigated SNP in the genetic risk of CCA.However,Hardy-Weinberg disequilibrium in the entire cohort and the intrahepatic CCA subgroup warrants future studies investigating a potential CCA risk modulation by individual blood groups.展开更多
Objective To evaluate the down stream involvement of the bile duct in hepatolithiasis.Methods Mechanical damage to bile duct epithelia and long standing cholangitis as result of hepatolithiasis play an important rol...Objective To evaluate the down stream involvement of the bile duct in hepatolithiasis.Methods Mechanical damage to bile duct epithelia and long standing cholangitis as result of hepatolithiasis play an important role in the carcinogenesis of bile duct epithelia and stricture of the intra- and extra-hepatic bile duct. Macromorphological and microscopic changes in bile duct mucosa of 100 consecutive patients with hepatolithiasis were investigated using intra- or post-operative cholangioscopy. Biopsy specimens of lesions obtained during cholangioscopy were studied with immunohistochemical staining and flow cytometry to determine proliferative activity and DNA content. Five cases of well-proven cholangiocarcinoma were simultaneously studied as controls.Results Of the 100 patients, those with chronic cholangitis accounted for 86% (86/100), proliferative lesions 11% (11/100), adenomatous polyps 1% (1/100), and adenocarcinoma 2% (2/100). The obvious mucosal lesion associated with hepatolithiasis was located down-stream of the bile duct, predominantly in the hilar region, e.g. orifices of the right/left hepatic duct and common hepatic duct (73% mucosa lesions in the hilar region). The intensity of cancer embryonic antigen stain and the proliferative cell nuclear antigen index increased with the development of bile duct lesions. Aneuploid DNA presented mainly in the high degree malignant adenocarcinomas (】80% of cases).Conclusions The obvious mucosal lesions associated with hepatolithiasis were located down-stream of the bile duct, predominantly in the hilar region (73% of mucosal lesions). The proliferative activity of examined bile duct mucosa lesions increased with the development of pathological deterioration, which may contribute to the development of hilar bile duct stricture and hilar cholangiocarcinoma.展开更多
基金a grant from Outstanding Youth Foundation of Shandong Province, China, No. 2005BS02008
文摘AIM： To characterize the tumor suppressor gene P53 mutations and study the correlation of P53 gene mutation and the expression of P53 protein in cholangiocarcinoma. METHODS： A total of 36 unselected, frozen samples of cholangiocarcinoma were collected, p53 gene status（exon 5-8） and P53 protein were examined by automated sequencing and immunohistochemical staining, combined with the clinical parameters of patients. RESULTS： P53 gene mutations were found in 22 of 36 （61.1%） patients. Nineteen of 36 （52.8%） patients were positive for P53 protein expression. There were significant differences in extent of differentiation and invasion between the positive and negative expression of P53 protein. However, there were no significant differences in pathologic parameters between the mutations and non-mutations. CONCLUSION： The alterations of the P53 gene evaluated by DNA sequence analysis is relatively accurate. Expression of P53 protein could not act as an independent index to estimate the prognosis of cholangiocarcinoma.
文摘The aim of this study was to investigate an association between the development of cholangiocarcinoma(CCA)and the ABO variant rs505922(known to increase pan-creatic cancer risk)in a large cohort of European individuals with CCA.In total,180 individuals with CCA and 350 CCA-free controls were included.The ABO variant rs505922 was genotyped using a polymerase chain reaction-based assay.Association between this single nucleotide polymorphism(SNP)and CCA was tested in contingency tables.Neither allele distributions nor association tests and regression analysis provided evidence for an increased risk of CCA among carriers of the ABO variant(all P > 0.05).Nevertheless,we documented a deviation from Hardy-Weinberg equilibrium in the entire CCA cohort(P = 0.028)and for patients with intrahe-patic(P = 0.037)but not extrahepatic tumor localization(P > 0.05).The association tests did not provide evidence for a prominent role of the investigated SNP in the genetic risk of CCA.However,Hardy-Weinberg disequilibrium in the entire cohort and the intrahepatic CCA subgroup warrants future studies investigating a potential CCA risk modulation by individual blood groups.
文摘Objective To evaluate the down stream involvement of the bile duct in hepatolithiasis.Methods Mechanical damage to bile duct epithelia and long standing cholangitis as result of hepatolithiasis play an important role in the carcinogenesis of bile duct epithelia and stricture of the intra- and extra-hepatic bile duct. Macromorphological and microscopic changes in bile duct mucosa of 100 consecutive patients with hepatolithiasis were investigated using intra- or post-operative cholangioscopy. Biopsy specimens of lesions obtained during cholangioscopy were studied with immunohistochemical staining and flow cytometry to determine proliferative activity and DNA content. Five cases of well-proven cholangiocarcinoma were simultaneously studied as controls.Results Of the 100 patients, those with chronic cholangitis accounted for 86% (86/100), proliferative lesions 11% (11/100), adenomatous polyps 1% (1/100), and adenocarcinoma 2% (2/100). The obvious mucosal lesion associated with hepatolithiasis was located down-stream of the bile duct, predominantly in the hilar region, e.g. orifices of the right/left hepatic duct and common hepatic duct (73% mucosa lesions in the hilar region). The intensity of cancer embryonic antigen stain and the proliferative cell nuclear antigen index increased with the development of bile duct lesions. Aneuploid DNA presented mainly in the high degree malignant adenocarcinomas (】80% of cases).Conclusions The obvious mucosal lesions associated with hepatolithiasis were located down-stream of the bile duct, predominantly in the hilar region (73% of mucosal lesions). The proliferative activity of examined bile duct mucosa lesions increased with the development of pathological deterioration, which may contribute to the development of hilar bile duct stricture and hilar cholangiocarcinoma.
