AIM： To study the expression of trefoil factor 1 （TFF1） and TFF2 in precancerous condition and gastric cancer and to explore the relationship between TFFs and tumorigenesis, precancerous condition and gastric cance...AIM： To study the expression of trefoil factor 1 （TFF1） and TFF2 in precancerous condition and gastric cancer and to explore the relationship between TFFs and tumorigenesis, precancerous condition and gastric cancer. METHODS： The expression of TFF1 and TFF2 was immunohistochemically analyzed in paraffin-embedded samples from 140 patients including 35 cases of chronic superficial gastritis （CSG）, 35 cases of gastric ulcer （GU）, 35 cases of chronic atrophic gastritis （CAG） and 35 cases of gastric cancer （GC）. RESULTS： TFF1 and TFF2 were located in cytoplasm of gastric mucous cells. In CSG, GU, CAG and GC, the level of TFF1 expression had a decreased tendency （P〈 0.05）. The expression of TFF2 was higher in GU than in CSG, but the difference was not significant. The expression of TFF2 also had a decreased tendency in GU, CAG, and GC （P〈 0.05）. CONCLUSION： The reduced expression of TFF1 and TFF2 in precancerous conditions and gastric cancer may be associated with the proliferation and malignant transformation of gastric mucosa. More investigations are needed to explore the mechanism of TFFs and the relationship between TFFs and gastric cancer.展开更多
Objective:We explored the role and molecular mechanism of Microcystin-LR(MC-LR) in hepatocarcinogenesis.Methods:The two-stage-medium-term theory was applied to the establishment of the animal model.The promoting effec...Objective:We explored the role and molecular mechanism of Microcystin-LR(MC-LR) in hepatocarcinogenesis.Methods:The two-stage-medium-term theory was applied to the establishment of the animal model.The promoting effect of MC-LR on liver tumor was evaluated with the Albert γ-GT methods.During the tumor-promoting course,the effects of MC-LR on the regulation and expression of the Bcl-2 and Bax genes were studied with immunohistochemical technique and RT-PCR.Results:MCLR could enhance the positive reaction of Albert γ-GT(GGT),a preneoplasm marker.The positive reaction rate of GGT in diethylnitrosamine(DEN) + MC group was significantly higher than that in the DEN control group.The protein and RNA expression of Bcl-2 was significantly increased by MC-LR,and that the protein expression of Bax was decreased simultaneously.Conclusion:These results indicate that the MC-LR can inhabit apoptosis through the Bcl-2 and Bax genes.Therefore,we conclude that the expression change of Bcl-2 and Bax genes possibly plays an important role in the promotion of liver tumor by MC-LR.展开更多
文摘AIM： To study the expression of trefoil factor 1 （TFF1） and TFF2 in precancerous condition and gastric cancer and to explore the relationship between TFFs and tumorigenesis, precancerous condition and gastric cancer. METHODS： The expression of TFF1 and TFF2 was immunohistochemically analyzed in paraffin-embedded samples from 140 patients including 35 cases of chronic superficial gastritis （CSG）, 35 cases of gastric ulcer （GU）, 35 cases of chronic atrophic gastritis （CAG） and 35 cases of gastric cancer （GC）. RESULTS： TFF1 and TFF2 were located in cytoplasm of gastric mucous cells. In CSG, GU, CAG and GC, the level of TFF1 expression had a decreased tendency （P〈 0.05）. The expression of TFF2 was higher in GU than in CSG, but the difference was not significant. The expression of TFF2 also had a decreased tendency in GU, CAG, and GC （P〈 0.05）. CONCLUSION： The reduced expression of TFF1 and TFF2 in precancerous conditions and gastric cancer may be associated with the proliferation and malignant transformation of gastric mucosa. More investigations are needed to explore the mechanism of TFFs and the relationship between TFFs and gastric cancer.
基金Supported by grants from the Natural Science Foundation of Fujian Province (No C0710019)the Science & Technology Program of Fuzhou (No 2006S-G24)
文摘Objective:We explored the role and molecular mechanism of Microcystin-LR(MC-LR) in hepatocarcinogenesis.Methods:The two-stage-medium-term theory was applied to the establishment of the animal model.The promoting effect of MC-LR on liver tumor was evaluated with the Albert γ-GT methods.During the tumor-promoting course,the effects of MC-LR on the regulation and expression of the Bcl-2 and Bax genes were studied with immunohistochemical technique and RT-PCR.Results:MCLR could enhance the positive reaction of Albert γ-GT(GGT),a preneoplasm marker.The positive reaction rate of GGT in diethylnitrosamine(DEN) + MC group was significantly higher than that in the DEN control group.The protein and RNA expression of Bcl-2 was significantly increased by MC-LR,and that the protein expression of Bax was decreased simultaneously.Conclusion:These results indicate that the MC-LR can inhabit apoptosis through the Bcl-2 and Bax genes.Therefore,we conclude that the expression change of Bcl-2 and Bax genes possibly plays an important role in the promotion of liver tumor by MC-LR.
