To investigate the effects of Cyclin D1 antisense oligodeoxyneucleotides (ASODN) on the growth, cell cycle progression and expression of G 1 phase regulators in human gastric carcinoma cell lines SGC7901 and HS746T, ...To investigate the effects of Cyclin D1 antisense oligodeoxyneucleotides (ASODN) on the growth, cell cycle progression and expression of G 1 phase regulators in human gastric carcinoma cell lines SGC7901 and HS746T, phosphorothioate modified Cyclin D1 ASODN were encapsulated by LipofectAMINE2000 and transfected into gastric carcinoma cells. Dose dependent inhibitory effects were induced by Cyclin D1 ASODN in two gastric carcinoma cell lines. Treatment of gastric carcinoma cells with 0.2 μmol/L Cyclin D1 ASODN for 24 h could significantly inhibit their growth in vitro and in vivo , reduce expression of Cyclin D1mRNA to 26.3 % (SGC7901) and 17.3 % (HS746T) respectively. The percentage of cells in G 0/G 1 phase was increased as revealed by flow cytometry. Immunohistochemical staining showed that the expression of p21 was increased and the expression of Cyclin D1 and pRb was decreased in the two cell lines; the expression of p27 was increased in HS746T, but unchanged in SGC7901. Cyclin D1 ASODN could inhibit the growth and the expression of Cyclin D1 mRNA in gastric carcinoma cells, influence the cell cycle and expression of its regulators.展开更多
Objective: To investigate the expression of p16, cyclin D1 and Rb protein in gastric carcinoma and premalignant lesions including dysplastic gastric mucosa and intestinal metaplasia gastric mucosa. Methods: Using SP i...Objective: To investigate the expression of p16, cyclin D1 and Rb protein in gastric carcinoma and premalignant lesions including dysplastic gastric mucosa and intestinal metaplasia gastric mucosa. Methods: Using SP immunohistochemical methods, the expression of pl6, cyclin D1 and Rb proteins was detected in 10 specimens of normal gastric mucosa, 15 specimens of dysplastic gastric mucosa, 15 specimens of intestinal metaplasia gastric mucosa, 30 specimens of gastric carcinoma. The clinical characteristics of the 30 patients with gastric carcinoma were analysed to explore the relationship between the parameter detected and biological action of gastric cancer. Results: Expression of p16 protein was detected in 90% of normal gastric mucosa, 86.67% of dysplastic gastric mucosa, 86.67% of intestinal metaplasia gastric mucosa, 36.67% of gastric carcinoma. The positive rate of p16 protein expression in gastric carcinoma is significantly lower than that in normal gastric mucosa and gastric premalignant lesions mucosa (P<0.01). Expression of cyclin D1 protein was detected in 10% of normal gastric mucosa, 20% of dysplastic gastric mucosa, 20% of intestinal metaplasia gastric mucosa, 53.33% of gastric carcinoma. The positive rate of cyclin D1, protein expression in gastric carcinoma is significantly higher than that in normal gastric mucosa and gastric premalignant lesions mucosa (P<0.05). Expression of Rb protein was detected in 90% of normal gastric mucosa, 80% of dysplastic gastric mucosa, 80% of intestinal metaplasia gastric mucosa, 50% of gastric carcinoma. The positive rate of Rb protein expression in gastric carcinoma is significantly lower than that in normal gastric mucosa (P<0.05). The expression of p16, cyclin D1 gene were associated with the degree of differentiation of gastric carcinoma, lymphnodes metastasis and distant metastasis. Conclusion: p16, Cyclin D1 and Rb gene play important role in gastric carcinoma genesis. The expression of p16, cyclin D1 and Rb gene have some value to the diagnosis at earlier stage of gastric cancer. Detection of expression of p16, cyclin D1 gene would be helpful to judge the prognosis of gastric cancer.展开更多
目的通过研究细胞周期蛋白p27、Cyc lin D1在胃癌组织中的表达水平,探讨其与胃癌生物学行为的关系。方法免疫组化S-P法检测50例胃癌组织中p27K ip1、Cyc lin D1蛋白的表达水平。患者术前均行电子纤维镜检查,并经病理证实为胃癌。每例标...目的通过研究细胞周期蛋白p27、Cyc lin D1在胃癌组织中的表达水平,探讨其与胃癌生物学行为的关系。方法免疫组化S-P法检测50例胃癌组织中p27K ip1、Cyc lin D1蛋白的表达水平。患者术前均行电子纤维镜检查,并经病理证实为胃癌。每例标本均含原发癌组织和周围正常组织,对照组周围正常组织距离癌组织5 cm以上。患者术前均未接受任何抗肿瘤治疗。结果50例胃癌中,癌组织p27K ip1蛋白阳性22例,占44.0%,与正常组织比较显著降低(P<0.001);Cyc lin D1蛋白表达阳性24例,占48.0%,与正常组织比较显著升高(P<0.001);p27K ip1蛋白表达水平与胃壁浸润深度、TNM分期、病理组织学分级、区域淋巴结转移均相关(P<0.05);而与肿瘤大小、部位、患者的年龄无显著相关性(P>0.05)。Cyc lin D1蛋白表达与病理组织学分级相关(P<0.05);p27K ip1与Cyc lin D1两者蛋白阳性表达无显著相关性(P>0.05);结论(1)p27K ip1蛋白表达可作为反映肿瘤恶性程度的指标,在一定程度上可反映胃癌病人的预后;(2)Cyc lin D1蛋白表达与胃癌病理组织学分级呈相关性,其过表达可能与胃癌的发生有关;(3)胃癌组织中p27K ip1与Cyc lin D1蛋白阳性表达两者无相关性;展开更多
Objective: To determine p16 and cyclin D1 expression in the specimen of gastric carcinoma, atypic hyperplasia, atrophic gastritis, superficial gastritis and normal gastric mucosa. Methods: Using immunohistochemical me...Objective: To determine p16 and cyclin D1 expression in the specimen of gastric carcinoma, atypic hyperplasia, atrophic gastritis, superficial gastritis and normal gastric mucosa. Methods: Using immunohistochemical method (ABC), the samples of 58 adenocarcinomas, 22 atypic hyperplasias, 28 atrophic gastritis, 27 superficial gastritis and 15 gastric epitheliums were analyzed. Results: Positive immunostaining rate for p16 protein was the highest in normal gastric mucosa and decreased with the lesions progressing from superficial gastritis to atrophic gastritis to atypital hyperplasia and to adenocarcinoma (85%, 78.6%, 31.8%, 48.3% respectively); Positive immunostaining of cyclin D1 can observed in atrophic gastritis. With the lesions progressing from atrophic gastritis to atypical hyperplasia to adenocarcinoma, its expression rate increased (17.9%, 36.4%, 53.4% respectively), and there was a significant difference between adenocarcinoma and atrophic gastritis group (P<0.05). An interesting observation was that inverse expression between p16 and cyclin D1, was shown in most of gastric cancer detected. Conclusion: It is indicated that p16 and cyclin D1 play an important role in the gastric carcinogenesis, the inverse expression between p16 and cyclin D1 suggested that there is a suppression trend in them.展开更多
文摘To investigate the effects of Cyclin D1 antisense oligodeoxyneucleotides (ASODN) on the growth, cell cycle progression and expression of G 1 phase regulators in human gastric carcinoma cell lines SGC7901 and HS746T, phosphorothioate modified Cyclin D1 ASODN were encapsulated by LipofectAMINE2000 and transfected into gastric carcinoma cells. Dose dependent inhibitory effects were induced by Cyclin D1 ASODN in two gastric carcinoma cell lines. Treatment of gastric carcinoma cells with 0.2 μmol/L Cyclin D1 ASODN for 24 h could significantly inhibit their growth in vitro and in vivo , reduce expression of Cyclin D1mRNA to 26.3 % (SGC7901) and 17.3 % (HS746T) respectively. The percentage of cells in G 0/G 1 phase was increased as revealed by flow cytometry. Immunohistochemical staining showed that the expression of p21 was increased and the expression of Cyclin D1 and pRb was decreased in the two cell lines; the expression of p27 was increased in HS746T, but unchanged in SGC7901. Cyclin D1 ASODN could inhibit the growth and the expression of Cyclin D1 mRNA in gastric carcinoma cells, influence the cell cycle and expression of its regulators.
文摘Objective: To investigate the expression of p16, cyclin D1 and Rb protein in gastric carcinoma and premalignant lesions including dysplastic gastric mucosa and intestinal metaplasia gastric mucosa. Methods: Using SP immunohistochemical methods, the expression of pl6, cyclin D1 and Rb proteins was detected in 10 specimens of normal gastric mucosa, 15 specimens of dysplastic gastric mucosa, 15 specimens of intestinal metaplasia gastric mucosa, 30 specimens of gastric carcinoma. The clinical characteristics of the 30 patients with gastric carcinoma were analysed to explore the relationship between the parameter detected and biological action of gastric cancer. Results: Expression of p16 protein was detected in 90% of normal gastric mucosa, 86.67% of dysplastic gastric mucosa, 86.67% of intestinal metaplasia gastric mucosa, 36.67% of gastric carcinoma. The positive rate of p16 protein expression in gastric carcinoma is significantly lower than that in normal gastric mucosa and gastric premalignant lesions mucosa (P<0.01). Expression of cyclin D1 protein was detected in 10% of normal gastric mucosa, 20% of dysplastic gastric mucosa, 20% of intestinal metaplasia gastric mucosa, 53.33% of gastric carcinoma. The positive rate of cyclin D1, protein expression in gastric carcinoma is significantly higher than that in normal gastric mucosa and gastric premalignant lesions mucosa (P<0.05). Expression of Rb protein was detected in 90% of normal gastric mucosa, 80% of dysplastic gastric mucosa, 80% of intestinal metaplasia gastric mucosa, 50% of gastric carcinoma. The positive rate of Rb protein expression in gastric carcinoma is significantly lower than that in normal gastric mucosa (P<0.05). The expression of p16, cyclin D1 gene were associated with the degree of differentiation of gastric carcinoma, lymphnodes metastasis and distant metastasis. Conclusion: p16, Cyclin D1 and Rb gene play important role in gastric carcinoma genesis. The expression of p16, cyclin D1 and Rb gene have some value to the diagnosis at earlier stage of gastric cancer. Detection of expression of p16, cyclin D1 gene would be helpful to judge the prognosis of gastric cancer.
文摘目的通过研究细胞周期蛋白p27、Cyc lin D1在胃癌组织中的表达水平,探讨其与胃癌生物学行为的关系。方法免疫组化S-P法检测50例胃癌组织中p27K ip1、Cyc lin D1蛋白的表达水平。患者术前均行电子纤维镜检查,并经病理证实为胃癌。每例标本均含原发癌组织和周围正常组织,对照组周围正常组织距离癌组织5 cm以上。患者术前均未接受任何抗肿瘤治疗。结果50例胃癌中,癌组织p27K ip1蛋白阳性22例,占44.0%,与正常组织比较显著降低(P<0.001);Cyc lin D1蛋白表达阳性24例,占48.0%,与正常组织比较显著升高(P<0.001);p27K ip1蛋白表达水平与胃壁浸润深度、TNM分期、病理组织学分级、区域淋巴结转移均相关(P<0.05);而与肿瘤大小、部位、患者的年龄无显著相关性(P>0.05)。Cyc lin D1蛋白表达与病理组织学分级相关(P<0.05);p27K ip1与Cyc lin D1两者蛋白阳性表达无显著相关性(P>0.05);结论(1)p27K ip1蛋白表达可作为反映肿瘤恶性程度的指标,在一定程度上可反映胃癌病人的预后;(2)Cyc lin D1蛋白表达与胃癌病理组织学分级呈相关性,其过表达可能与胃癌的发生有关;(3)胃癌组织中p27K ip1与Cyc lin D1蛋白阳性表达两者无相关性;
文摘Objective: To determine p16 and cyclin D1 expression in the specimen of gastric carcinoma, atypic hyperplasia, atrophic gastritis, superficial gastritis and normal gastric mucosa. Methods: Using immunohistochemical method (ABC), the samples of 58 adenocarcinomas, 22 atypic hyperplasias, 28 atrophic gastritis, 27 superficial gastritis and 15 gastric epitheliums were analyzed. Results: Positive immunostaining rate for p16 protein was the highest in normal gastric mucosa and decreased with the lesions progressing from superficial gastritis to atrophic gastritis to atypital hyperplasia and to adenocarcinoma (85%, 78.6%, 31.8%, 48.3% respectively); Positive immunostaining of cyclin D1 can observed in atrophic gastritis. With the lesions progressing from atrophic gastritis to atypical hyperplasia to adenocarcinoma, its expression rate increased (17.9%, 36.4%, 53.4% respectively), and there was a significant difference between adenocarcinoma and atrophic gastritis group (P<0.05). An interesting observation was that inverse expression between p16 and cyclin D1, was shown in most of gastric cancer detected. Conclusion: It is indicated that p16 and cyclin D1 play an important role in the gastric carcinogenesis, the inverse expression between p16 and cyclin D1 suggested that there is a suppression trend in them.