INTRODUCTIONIn China,primary liver cancer (PLC) ranks secondin cancer mortality since the 1990s.In the field ofPLC treatment,surgical resection remains the best,which includes large PLC resection,small PLCresection,re...INTRODUCTIONIn China,primary liver cancer (PLC) ranks secondin cancer mortality since the 1990s.In the field ofPLC treatment,surgical resection remains the best,which includes large PLC resection,small PLCresection,re-resection of subclinical recurrence,aswell as cytoreduction and sequential resection forunresectable PLC.However,recurrence展开更多
AIM: Glutathione S-transferases (GSTs) are involved in the detoxification of many potential carcinogens and appear to play a critical role in the protection from the effects of carcinogens. The contribution of glutath...AIM: Glutathione S-transferases (GSTs) are involved in the detoxification of many potential carcinogens and appear to play a critical role in the protection from the effects of carcinogens. The contribution of glutathione S-transferases M1 and T1 genotypes to susceptibility to the risk of gastric cancer and their interaction with cigarette smoking are still unclear. The aim of this study was to determine whether there was any relationship between genetic polymorphisms of GSTT1 and GSTT1 and gastric cancer. METHODS: A population based case-control study was carried out in a high-risk area, Changle County, Fujian Province, China. The epidemiological data were collected by a standard questionnaire and blood samples were obtained from 95 incidence gastric cancer cases and 94 healthy controls. A polymerase chain reaction method was used to detect the presence or absence of the GSTT1 and GSTT1 genes in genomic DNA. Logistic regression model was employed in the data analysis. RESULTS: An increase in risk for gastric cancer was found among carriers of GSTT1 null genotype. The adjusted odds ratio (OR) was 2.63 95% Confidence Interval (95% CI) 1.17-5.88, after controlling for age, gender, cigarette smoking, alcohol drinking, and fish sauce intake. The frequency of GSTT1 null genotype in cancer cases (43.16%) was not significantly different from that in controls (50.00%). However, the risk for gastric cancer in those with GSTT1 null and GSTT1 non-null genotype was significantly higher than in those with both GSTT1 and GSTT1 non-null genotype (OR = 2.77, 95% CI 1.15-6.77). Compared with those subjects who never smoked and had normal GSTT1 genotype, ORs were 1.60 (95% CI:0.62-4.19) for never smokers with GSTT1 null type, 2.33 (95% CI 0.88-6.28) for smokers with normal GSTT1, and 8.06 (95% CI 2.83-23.67) for smokers with GSTT1 null type. CONCLUSIONS: GSTT1 gene polymorphisms may be associated with genetic susceptibility of stomach cancer and may modulate tobacco-related carcinogenesis of gastric cancer.展开更多
目的观察幽门螺杆菌(Hp)感染诱导胃粘膜上皮细胞凋亡与Bax 蛋白表达的关系,探讨 Hp 诱导胃粘膜上皮细胞凋亡的机制。方法采用脱氧核糖核酸末端转移酶介导的缺口末端标记(TUNEL)技术原位观察和比较73例慢性胃炎患者胃粘膜上皮细胞凋亡情...目的观察幽门螺杆菌(Hp)感染诱导胃粘膜上皮细胞凋亡与Bax 蛋白表达的关系,探讨 Hp 诱导胃粘膜上皮细胞凋亡的机制。方法采用脱氧核糖核酸末端转移酶介导的缺口末端标记(TUNEL)技术原位观察和比较73例慢性胃炎患者胃粘膜上皮细胞凋亡情况,对其中50例 Hp 阳性患者 Hp 根除前后胃粘膜上皮细胞凋亡的变化进行检测;并采用免疫组织化学染色检测 Bax 蛋白表达变化。结果 Hp 阳性患者胃粘膜上皮细胞凋亡指数为12.8%,明显高于 Hp 阴性者(3.6%)(t=6.64,P<0.01);Hp 根除后胃粘膜上皮细胞凋亡指数(4.4%)较治疗前明显降低(12.5%,t=5.39,P<0.01),而持续阳性者凋亡指数无明显降低,Hp阳性患者胃粘膜上皮细胞 Bax 蛋白表达率为62.3%,显著高于Hp 阴性者(35.0%,x^2=4.36,P<O.05);Bax 蛋白表达阳性的 Hp 阳性患者在 Hp 根除后 Bax 阳性细胞密度显著减少(t=3.18,P<0.01),而 Hp 未被根除者 Bax 阳性细胞密度无明显变化。结论 Hp 感染可诱导胃粘膜上皮细胞凋亡,这可能是 Hp 参与胃癌发生的重要机制之一;Hp 感染可促进 Bax 蛋白表达增加,这可能是 Hp 感染诱导胃粘膜上皮细胞凋亡的机制之一。展开更多
文摘INTRODUCTIONIn China,primary liver cancer (PLC) ranks secondin cancer mortality since the 1990s.In the field ofPLC treatment,surgical resection remains the best,which includes large PLC resection,small PLCresection,re-resection of subclinical recurrence,aswell as cytoreduction and sequential resection forunresectable PLC.However,recurrence
基金Natural Science Foundation of Fujian Province,China,No.C001009
文摘AIM: Glutathione S-transferases (GSTs) are involved in the detoxification of many potential carcinogens and appear to play a critical role in the protection from the effects of carcinogens. The contribution of glutathione S-transferases M1 and T1 genotypes to susceptibility to the risk of gastric cancer and their interaction with cigarette smoking are still unclear. The aim of this study was to determine whether there was any relationship between genetic polymorphisms of GSTT1 and GSTT1 and gastric cancer. METHODS: A population based case-control study was carried out in a high-risk area, Changle County, Fujian Province, China. The epidemiological data were collected by a standard questionnaire and blood samples were obtained from 95 incidence gastric cancer cases and 94 healthy controls. A polymerase chain reaction method was used to detect the presence or absence of the GSTT1 and GSTT1 genes in genomic DNA. Logistic regression model was employed in the data analysis. RESULTS: An increase in risk for gastric cancer was found among carriers of GSTT1 null genotype. The adjusted odds ratio (OR) was 2.63 95% Confidence Interval (95% CI) 1.17-5.88, after controlling for age, gender, cigarette smoking, alcohol drinking, and fish sauce intake. The frequency of GSTT1 null genotype in cancer cases (43.16%) was not significantly different from that in controls (50.00%). However, the risk for gastric cancer in those with GSTT1 null and GSTT1 non-null genotype was significantly higher than in those with both GSTT1 and GSTT1 non-null genotype (OR = 2.77, 95% CI 1.15-6.77). Compared with those subjects who never smoked and had normal GSTT1 genotype, ORs were 1.60 (95% CI:0.62-4.19) for never smokers with GSTT1 null type, 2.33 (95% CI 0.88-6.28) for smokers with normal GSTT1, and 8.06 (95% CI 2.83-23.67) for smokers with GSTT1 null type. CONCLUSIONS: GSTT1 gene polymorphisms may be associated with genetic susceptibility of stomach cancer and may modulate tobacco-related carcinogenesis of gastric cancer.
文摘目的观察幽门螺杆菌(Hp)感染诱导胃粘膜上皮细胞凋亡与Bax 蛋白表达的关系,探讨 Hp 诱导胃粘膜上皮细胞凋亡的机制。方法采用脱氧核糖核酸末端转移酶介导的缺口末端标记(TUNEL)技术原位观察和比较73例慢性胃炎患者胃粘膜上皮细胞凋亡情况,对其中50例 Hp 阳性患者 Hp 根除前后胃粘膜上皮细胞凋亡的变化进行检测;并采用免疫组织化学染色检测 Bax 蛋白表达变化。结果 Hp 阳性患者胃粘膜上皮细胞凋亡指数为12.8%,明显高于 Hp 阴性者(3.6%)(t=6.64,P<0.01);Hp 根除后胃粘膜上皮细胞凋亡指数(4.4%)较治疗前明显降低(12.5%,t=5.39,P<0.01),而持续阳性者凋亡指数无明显降低,Hp阳性患者胃粘膜上皮细胞 Bax 蛋白表达率为62.3%,显著高于Hp 阴性者(35.0%,x^2=4.36,P<O.05);Bax 蛋白表达阳性的 Hp 阳性患者在 Hp 根除后 Bax 阳性细胞密度显著减少(t=3.18,P<0.01),而 Hp 未被根除者 Bax 阳性细胞密度无明显变化。结论 Hp 感染可诱导胃粘膜上皮细胞凋亡,这可能是 Hp 参与胃癌发生的重要机制之一;Hp 感染可促进 Bax 蛋白表达增加,这可能是 Hp 感染诱导胃粘膜上皮细胞凋亡的机制之一。
