INTRODUCTIONIn China ,the incidence and mortality of gastric cancer rank the second among all cancers. Recent development of cancer [1-20].The aim of this study was investigat the insight of apoptosis and bcl-2, p53 a...INTRODUCTIONIn China ,the incidence and mortality of gastric cancer rank the second among all cancers. Recent development of cancer [1-20].The aim of this study was investigat the insight of apoptosis and bcl-2, p53 and C-myc protein expression in the development of gastric cancer .展开更多
Objective: To evaluate the relationship between the expressions of cyclin D1 and p27^kip1 in the canceration course of the stomach. Methods: The immunohistochemical staining technique (SP method) was used to detec...Objective: To evaluate the relationship between the expressions of cyclin D1 and p27^kip1 in the canceration course of the stomach. Methods: The immunohistochemical staining technique (SP method) was used to detect the expressions of cyclin D1, p27^kip1 in chronic superficial gastritis (CSG), chronic atrophic gastritis (CAG), intestinal metaplasia (IM), dysplasia (DYS), gastric carcinoma (GCA) biopsy specimens. Results: The positive cyclin D1 expression rates increased with the progressing from CAG--,IM--,DYS--,GCA respectively, and those in IM, DYS and GCA were different from those in CSG, P 〈 0.05, while DYS group was indifferent from GCA group, P 〉 0.05. The positive p27^kip1 expression rates decreased with the mucosa progressing from CAG→IM→DYS→GCA. There was a negative correlation between the expression cyclin D1 and p27^kip1 (y = -0.53, P = 0.000). Conclusion: Expression rates of cyclin D1 in the canceration course of the stomach mucosa trend were increased and those of p27^kip1 were decreased; the abnormal expressions of them were found in the early term of the canceration course of the stomach mucosa, and the inverse expression suggests there may be a negative feedback regulatory loop between cyclin D1 and p27^kip1.展开更多
目的:探讨胃癌组织中程序性细胞死亡因子4(programmed cell death 4,PDCD4)的表达及其临床病理学意义。方法:应用免疫组织化学和Western印迹杂交研究方法检测61例胃癌组织中PDCD4的表达,观察其与胃癌临床病理学参数之间的关系。...目的:探讨胃癌组织中程序性细胞死亡因子4(programmed cell death 4,PDCD4)的表达及其临床病理学意义。方法:应用免疫组织化学和Western印迹杂交研究方法检测61例胃癌组织中PDCD4的表达,观察其与胃癌临床病理学参数之间的关系。结果:免疫组化染色显示,在正常胃组织中,阳性细胞比例均在80%以上。61例胃癌中,PDCD4低表达者(阳性细胞比例〈30%)占65.6%(40/61),高表达(阳性细胞比例介于30%~80%)者占34.4%(21/61)。Western印迹分析结果显示,同癌旁正常组织相比,所有胃癌组织PDCD4蛋白表达均明显下调。相关分析表明,PDCD4表达下调或缺失与肿瘤的不良分化相关,P〈0.01,而与性别、年龄厦肿瘤的TNM分期无关。结论:PDCD4蛋白在胃癌中多呈低表达,并与胃癌的分化程度有关,在胃癌的发生、发展过程中起重要作用。展开更多
目的通过检测慢性胃炎、肠化生、不典型增生和胃癌组织中幽门螺杆菌(Hp)感染、蛋白激酶C(PKC)水平、细胞增殖水平以及p53突变基因表达状态探讨Hp感染在胃癌发生中的作用及其作用机制。方法采用病例对照研究,病例来源于中山医院,经内镜...目的通过检测慢性胃炎、肠化生、不典型增生和胃癌组织中幽门螺杆菌(Hp)感染、蛋白激酶C(PKC)水平、细胞增殖水平以及p53突变基因表达状态探讨Hp感染在胃癌发生中的作用及其作用机制。方法采用病例对照研究,病例来源于中山医院,经内镜和病理检查证实。Hp感染采用快速尿素酶和病理Gimsa染色检测。PKC的检测采用免疫组化EnVision^(TM)法,增殖细胞核抗原(PCNA)、突变型p53基因表达的检测采用免疫组织化学方法。结果①总的Hp感染的检出率为76.2%(138/181)。在慢性胃炎肠化生组、不典型增生组、胃癌组分别为62.0%(31/50),88.6%(39/44),78.3%(68/87),均明显高于单纯慢性胃炎对照组52.6%(20/38,P<0.05)。②PCNA增殖指数在三组病例中均处于高水平,且Hp阳性组均高于Hp阴性组。③突变型p53基因表达在肠上皮化生、不典型增生和胃癌组阳性率分别为36.0%(18/50),54.6%(24/44),57.2%(48/84)。不典型增生和胃癌组均明显高于肠上皮化生组。在肠化生组,Hp阳性病例的P53表达率明显高于Hp阴性病例(48.5% vs15.8%,P=0.020)。但在不典型增生和胃癌组,Hp阳性与Hp阴性病例的P53突变蛋白表达率无明显差别(53.9% vs60.0%,P=0.794;53.8% vs 68.4%,P=0.258)。P53表达与PCNA增殖指数有明显的相关性。④PKC在慢性胃炎伴肠化生、不典型增生和胃癌组阳性表达的比例呈递增趋势,分别为16.0%,28.5%,41.8%,对照组的阳性表达率不足5%。Hp阳性组PKC表达阳性率(47/130,36.2%)高于Hp阴性组(6/41,14.6%.P=(0.010)。PKC表达组,其P53表达的阳性率和阳性表达程度均高于PKC无表达的病例,在肠化生组统计学检验差异有显著性(75.0% vs 28.6%,P=0.012),不典型增生(66.7% vs 50.0%,P=0.430)和胃癌(63.6% vs 52.2%,P=0.310)统计学检验差异无显著性。结论在从慢性胃炎到肠上皮化生、不典型增生、胃癌的发生过程中,存在PKC表达水平的增高、PCNA高表达和突变型P53基因表达的异常增高,而且这种增高在肠上皮化生阶段就很明显。Hp感染在肠化生阶段促进p53基因突变,其作用途径可能系通过PKC表达增强。P53蛋白可以作为早期监测胃癌发生或高危人群(肠化生)的指标。展开更多
基金Supported by the Medical Research Foundation of Guangdong Province,No.1997423
文摘INTRODUCTIONIn China ,the incidence and mortality of gastric cancer rank the second among all cancers. Recent development of cancer [1-20].The aim of this study was investigat the insight of apoptosis and bcl-2, p53 and C-myc protein expression in the development of gastric cancer .
文摘Objective: To evaluate the relationship between the expressions of cyclin D1 and p27^kip1 in the canceration course of the stomach. Methods: The immunohistochemical staining technique (SP method) was used to detect the expressions of cyclin D1, p27^kip1 in chronic superficial gastritis (CSG), chronic atrophic gastritis (CAG), intestinal metaplasia (IM), dysplasia (DYS), gastric carcinoma (GCA) biopsy specimens. Results: The positive cyclin D1 expression rates increased with the progressing from CAG--,IM--,DYS--,GCA respectively, and those in IM, DYS and GCA were different from those in CSG, P 〈 0.05, while DYS group was indifferent from GCA group, P 〉 0.05. The positive p27^kip1 expression rates decreased with the mucosa progressing from CAG→IM→DYS→GCA. There was a negative correlation between the expression cyclin D1 and p27^kip1 (y = -0.53, P = 0.000). Conclusion: Expression rates of cyclin D1 in the canceration course of the stomach mucosa trend were increased and those of p27^kip1 were decreased; the abnormal expressions of them were found in the early term of the canceration course of the stomach mucosa, and the inverse expression suggests there may be a negative feedback regulatory loop between cyclin D1 and p27^kip1.
文摘目的:探讨胃癌组织中程序性细胞死亡因子4(programmed cell death 4,PDCD4)的表达及其临床病理学意义。方法:应用免疫组织化学和Western印迹杂交研究方法检测61例胃癌组织中PDCD4的表达,观察其与胃癌临床病理学参数之间的关系。结果:免疫组化染色显示,在正常胃组织中,阳性细胞比例均在80%以上。61例胃癌中,PDCD4低表达者(阳性细胞比例〈30%)占65.6%(40/61),高表达(阳性细胞比例介于30%~80%)者占34.4%(21/61)。Western印迹分析结果显示,同癌旁正常组织相比,所有胃癌组织PDCD4蛋白表达均明显下调。相关分析表明,PDCD4表达下调或缺失与肿瘤的不良分化相关,P〈0.01,而与性别、年龄厦肿瘤的TNM分期无关。结论:PDCD4蛋白在胃癌中多呈低表达,并与胃癌的分化程度有关,在胃癌的发生、发展过程中起重要作用。
文摘目的通过检测慢性胃炎、肠化生、不典型增生和胃癌组织中幽门螺杆菌(Hp)感染、蛋白激酶C(PKC)水平、细胞增殖水平以及p53突变基因表达状态探讨Hp感染在胃癌发生中的作用及其作用机制。方法采用病例对照研究,病例来源于中山医院,经内镜和病理检查证实。Hp感染采用快速尿素酶和病理Gimsa染色检测。PKC的检测采用免疫组化EnVision^(TM)法,增殖细胞核抗原(PCNA)、突变型p53基因表达的检测采用免疫组织化学方法。结果①总的Hp感染的检出率为76.2%(138/181)。在慢性胃炎肠化生组、不典型增生组、胃癌组分别为62.0%(31/50),88.6%(39/44),78.3%(68/87),均明显高于单纯慢性胃炎对照组52.6%(20/38,P<0.05)。②PCNA增殖指数在三组病例中均处于高水平,且Hp阳性组均高于Hp阴性组。③突变型p53基因表达在肠上皮化生、不典型增生和胃癌组阳性率分别为36.0%(18/50),54.6%(24/44),57.2%(48/84)。不典型增生和胃癌组均明显高于肠上皮化生组。在肠化生组,Hp阳性病例的P53表达率明显高于Hp阴性病例(48.5% vs15.8%,P=0.020)。但在不典型增生和胃癌组,Hp阳性与Hp阴性病例的P53突变蛋白表达率无明显差别(53.9% vs60.0%,P=0.794;53.8% vs 68.4%,P=0.258)。P53表达与PCNA增殖指数有明显的相关性。④PKC在慢性胃炎伴肠化生、不典型增生和胃癌组阳性表达的比例呈递增趋势,分别为16.0%,28.5%,41.8%,对照组的阳性表达率不足5%。Hp阳性组PKC表达阳性率(47/130,36.2%)高于Hp阴性组(6/41,14.6%.P=(0.010)。PKC表达组,其P53表达的阳性率和阳性表达程度均高于PKC无表达的病例,在肠化生组统计学检验差异有显著性(75.0% vs 28.6%,P=0.012),不典型增生(66.7% vs 50.0%,P=0.430)和胃癌(63.6% vs 52.2%,P=0.310)统计学检验差异无显著性。结论在从慢性胃炎到肠上皮化生、不典型增生、胃癌的发生过程中,存在PKC表达水平的增高、PCNA高表达和突变型P53基因表达的异常增高,而且这种增高在肠上皮化生阶段就很明显。Hp感染在肠化生阶段促进p53基因突变,其作用途径可能系通过PKC表达增强。P53蛋白可以作为早期监测胃癌发生或高危人群(肠化生)的指标。