AIM To study the significance of C-erbB-2 oncogene amplification in gastric cancer.METHODS C-erbB-2 oncogene amplification was examined by using differential polymerase chain reaction (dPCR) in surgical and endoscopic...AIM To study the significance of C-erbB-2 oncogene amplification in gastric cancer.METHODS C-erbB-2 oncogene amplification was examined by using differential polymerase chain reaction (dPCR) in surgical and endoscopic specimens of 83 cases of gastric cancer and 101 metastatic lymph nodes.RESULTS C-erbB-2 amplification was found in 28.9% (24/ 83) surgical specimens and 20.5% (17/ 83) endoscopic ones of gastric cancer patients. The amplification was significant in both types of specimens of advanced cancer cases (P<0.05) and surgical specimens with lymph node metastasis (P<0.01). The incidence of C-erbB-2 amplification in lymph nodes with metastasis was higher than in primary sites (surgical specimens, P<0.05). The patients with amplification tumors had poorer 5-year survival rates than those with unamplification ones in the early cancers and well to moderately differentiated adenocarcinomas (P<0.05). The same surgical samples were tested again by Southern blot hybridization to ascertain C-erbB-2 amplification, and the positive rate of C-erbB-2 amplification (15.7%) was lower than that of dPCR (28.9%, P<0.05).CONCLUSION Examining C-erbB-2 amplification by dPCR is a quick, simple, reliable and independent method, and is helpful in predicting prognosis and metastatic potential of gastric cancer.展开更多
Cytologic locailzation of epidermai growth factor receptor (EGF-R) and C-erbB2oncogene product in normal developing placenta ovas studied by avidin/biotin immunoperoxidase techniques.Both proteins were predominantly e...Cytologic locailzation of epidermai growth factor receptor (EGF-R) and C-erbB2oncogene product in normal developing placenta ovas studied by avidin/biotin immunoperoxidase techniques.Both proteins were predominantly expressed in the villous syncytiotrophoblasts but not in the cytotrophoblasts.The immunoreactive intensity for EGF-R decreased with the development of pregnancy.Concerning the intermediate trophoblasts in cell islands and cell columns,both proteins were more easily detected in the cells distal to the villous stroma than in the juxtastromal cells.These findings suggest that EGF-R and C-erbB-2 may play a significant role in the induction and regulation of differentiated trophoblast function展开更多
基金Project supported by the zhejiang Natural Scierce Fundation No.925006.
文摘AIM To study the significance of C-erbB-2 oncogene amplification in gastric cancer.METHODS C-erbB-2 oncogene amplification was examined by using differential polymerase chain reaction (dPCR) in surgical and endoscopic specimens of 83 cases of gastric cancer and 101 metastatic lymph nodes.RESULTS C-erbB-2 amplification was found in 28.9% (24/ 83) surgical specimens and 20.5% (17/ 83) endoscopic ones of gastric cancer patients. The amplification was significant in both types of specimens of advanced cancer cases (P<0.05) and surgical specimens with lymph node metastasis (P<0.01). The incidence of C-erbB-2 amplification in lymph nodes with metastasis was higher than in primary sites (surgical specimens, P<0.05). The patients with amplification tumors had poorer 5-year survival rates than those with unamplification ones in the early cancers and well to moderately differentiated adenocarcinomas (P<0.05). The same surgical samples were tested again by Southern blot hybridization to ascertain C-erbB-2 amplification, and the positive rate of C-erbB-2 amplification (15.7%) was lower than that of dPCR (28.9%, P<0.05).CONCLUSION Examining C-erbB-2 amplification by dPCR is a quick, simple, reliable and independent method, and is helpful in predicting prognosis and metastatic potential of gastric cancer.
文摘Cytologic locailzation of epidermai growth factor receptor (EGF-R) and C-erbB2oncogene product in normal developing placenta ovas studied by avidin/biotin immunoperoxidase techniques.Both proteins were predominantly expressed in the villous syncytiotrophoblasts but not in the cytotrophoblasts.The immunoreactive intensity for EGF-R decreased with the development of pregnancy.Concerning the intermediate trophoblasts in cell islands and cell columns,both proteins were more easily detected in the cells distal to the villous stroma than in the juxtastromal cells.These findings suggest that EGF-R and C-erbB-2 may play a significant role in the induction and regulation of differentiated trophoblast function