Objective: To investigate p16, C-fos protein expression and their relationships in osteosarcoma. Methods: Immunohistochemical technique (SABC) was used to detect p16 and C-fos protein expression in 41 cases of osteosa...Objective: To investigate p16, C-fos protein expression and their relationships in osteosarcoma. Methods: Immunohistochemical technique (SABC) was used to detect p16 and C-fos protein expression in 41 cases of osteosarcoma. Results: The positive rates of p16 and C-fos protein expression were 51.2% and 82.9% respectively. Their expression was not correlated to pathological subtype, but correlated to clinic grade, and the latter was associated with tumor metastasis. There was a negative correlation between p16 and C-fos protein expression. Conclusion: The alteration of p16 and C-fos protein expression may be related to the tumorigenesis and development of osteosarcoma, and C-fos proteins may take part in osteosarcoma metastasis. These data will offer useful helpness to determine the prognosis of osteosarcoma.展开更多
AIM: To investigate the role of cyclin D1, p16 and retinoblastoma in cancerous process of gallbladder carcinomas and to assess the relation between cyclin D1, p16, Rb and the biological characteristics of gallbladder ...AIM: To investigate the role of cyclin D1, p16 and retinoblastoma in cancerous process of gallbladder carcinomas and to assess the relation between cyclin D1, p16, Rb and the biological characteristics of gallbladder carcinoma. METHODS: Forty-one gallbladder carcinoma, 7 gallbladder adenoma and 14 chronic cholecystitis specimens were immunohistochemically and histopathologically investigated for the relation of cyclin D1, p16 and Rb with Nevin staging and pathologic grading. RESULTS: The expression rates of abnormal cyclin Dl in gallbladder carcinoma (68.3%)and gallbladder adenoma (57.1%) were significantly higher than those in chronic cholecystitis (7.1%) (P<0.05). No significant difference was found both among the pathological grades G1, G2 and G3 and among Nevin stagings S1-S2, S3 and S4-S5 of gallbladder carcinoma. The positive rates of p16 (48.8%) and Rb (58.5%) in gallbladder carcinoma were significantly lower compared to those in adenoma (100.0%) and cholecystitis (100.0%) (P<0.05). The positive rates of p16 and Rb in Nevin stagings S1-S2 (80.0% and 90.0%) and S3 (46.2% and 61.5%) gallbladder carcinomas were significantly higher than those in S4-S5(33.3% and 38.8%) (P<0.05), and those in pathologic grades G1(54.5% and 81.8%) and G2 (50.0% and 62.5%) gallbladder carcinoma were significantly higher than those in G3 (28.6% and 35.7%) (P<0.05). The protein expression of p16 and Rb had a negative-correlation in gallbladder carcinoma (r= -0.2993, P<0.05), and this negative-correlation was correlated with Nevin staging (P<0.05). Moreover, the protein expression of p16 and cyclin Dl had a negative-correlation in gallbladder carcinoma (r = -0.9417, P<0.05). CONCLUSION: Cyclin Dl may play a role in the early stage of gallbladder carcinoma. Mutation of p16 and Rb genes might be correlated with progression of gallbladder carcinoma. Analysis of p16 and Rb can estimate the prognosis of gallbladder carcinoma. Expression of p16 and Rb may be correlated with Nevin staging and pathologic grading in gallbladder carcinoma.展开更多
Objective： To detect the changes of p16 and FHIT and investigate their relationship in esophageal squamous cell carcinoma development by measuring their expression levels in normal squamous epithelium tissue, mild, m...Objective： To detect the changes of p16 and FHIT and investigate their relationship in esophageal squamous cell carcinoma development by measuring their expression levels in normal squamous epithelium tissue, mild, moderate, severe dysplasia lesions, carcinoma in situ and invasive squamous cell carcinomas. Methods： Expressions of p16 protein and FHIT protein were detected and analyzed in 17 cases of normal squamous epithelium, 16 cases of mild dysplasia, 16 cases of moderate dysplasia, 17 cases of severe dysplasia, 10 cases of carcinoma in situ, and 18 cases of esophageal squamous cell carcinoma by immunohistochemical method. Results： With increasing histopathologic grades, the expressions of pl6 and FHIT became gradually lower. There was no remarkable difference of p16 and FHIT expressions between the normal and mild dysplasia group （P〉0.05）, but the differences between the normal and other groups were all significant （P〈0.05）. There was no remarkable difference among the squamous cell carcinoma group, the moderate and severe dysplasia groups, and the carcinoma in situ group （P〉0.05）, but significant differences existed in the expressions of p16 and FHIT proteins between the squamous cell carcinoma and the normal groups, and between the squamous cell carcinoma and the mild dysplasia groups （P〈0.05）. There was an association of descending trend between p16 and FHIT protein expressions. Conclusion： Reduced expressions of pl6 and/or FHIT proteins possible play an important role in the early occurrence of esophageal cancer. There was a positive correlation between the expressions of p16 and FHIT proteins.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
Objective : To investigate the role and clinical significance of p16 protein in Condyloma Acuminatum (CA) and its cancerization. Methods: The expression of p16 protein was tested in 33 CA samples and 7 cancerized CA s...Objective : To investigate the role and clinical significance of p16 protein in Condyloma Acuminatum (CA) and its cancerization. Methods: The expression of p16 protein was tested in 33 CA samples and 7 cancerized CA samples by immunohistochemical assays. Results: There was abnormal expression of p16 protein in CA and cancerized CA, mainly major protein expression. The p16 protein expresseed in different locations in different cases was as follows: In basal layer cells in normal cuits; in spinous layer, granular layer and stratum corneum layer cells in CA;in keratin pearl peripheral and spinous layer cells in cancerized CA. Conclusion.. There was major expression of p16 protein in CA and cancerized CA, and these protein of the two groups might not naturally be the same. Our study indicated that in clinical practice, when major p16 protein expression in CA occurs, it's risk of cancerization shoud be suspected.展开更多
The mechanism and interaction among Rb/p16, Rb/E2F1 and HDAC1 proteins in gallbladder carcinoma were investigated. By using the immunoprecipitation method, the interactions among Rb, p16, E2F1, HDAC1 proteins in gallb...The mechanism and interaction among Rb/p16, Rb/E2F1 and HDAC1 proteins in gallbladder carcinoma were investigated. By using the immunoprecipitation method, the interactions among Rb, p16, E2F1, HDAC1 proteins in gallbladder carcinoma cell line （Mz-ChA-1） were studied. It was found that there were Rb and E2F1 proteins in the precipitates with anti-HDAC1, and there were HDAC1 and E2F1 proteins in the precipitate with anti-Rb. It was concluded that there are specific interactions among Rb, HDAC1 and E2F1 proteins in gallbladder carcinoma, indicating the existence of the direct Rb/E2F1/HDAC1 signal transduction pathway. There is no direct relationship between p16 proteins with Rb, HDAC1, and E2F1 proteins.展开更多
文摘Objective: To investigate p16, C-fos protein expression and their relationships in osteosarcoma. Methods: Immunohistochemical technique (SABC) was used to detect p16 and C-fos protein expression in 41 cases of osteosarcoma. Results: The positive rates of p16 and C-fos protein expression were 51.2% and 82.9% respectively. Their expression was not correlated to pathological subtype, but correlated to clinic grade, and the latter was associated with tumor metastasis. There was a negative correlation between p16 and C-fos protein expression. Conclusion: The alteration of p16 and C-fos protein expression may be related to the tumorigenesis and development of osteosarcoma, and C-fos proteins may take part in osteosarcoma metastasis. These data will offer useful helpness to determine the prognosis of osteosarcoma.
文摘AIM: To investigate the role of cyclin D1, p16 and retinoblastoma in cancerous process of gallbladder carcinomas and to assess the relation between cyclin D1, p16, Rb and the biological characteristics of gallbladder carcinoma. METHODS: Forty-one gallbladder carcinoma, 7 gallbladder adenoma and 14 chronic cholecystitis specimens were immunohistochemically and histopathologically investigated for the relation of cyclin D1, p16 and Rb with Nevin staging and pathologic grading. RESULTS: The expression rates of abnormal cyclin Dl in gallbladder carcinoma (68.3%)and gallbladder adenoma (57.1%) were significantly higher than those in chronic cholecystitis (7.1%) (P<0.05). No significant difference was found both among the pathological grades G1, G2 and G3 and among Nevin stagings S1-S2, S3 and S4-S5 of gallbladder carcinoma. The positive rates of p16 (48.8%) and Rb (58.5%) in gallbladder carcinoma were significantly lower compared to those in adenoma (100.0%) and cholecystitis (100.0%) (P<0.05). The positive rates of p16 and Rb in Nevin stagings S1-S2 (80.0% and 90.0%) and S3 (46.2% and 61.5%) gallbladder carcinomas were significantly higher than those in S4-S5(33.3% and 38.8%) (P<0.05), and those in pathologic grades G1(54.5% and 81.8%) and G2 (50.0% and 62.5%) gallbladder carcinoma were significantly higher than those in G3 (28.6% and 35.7%) (P<0.05). The protein expression of p16 and Rb had a negative-correlation in gallbladder carcinoma (r= -0.2993, P<0.05), and this negative-correlation was correlated with Nevin staging (P<0.05). Moreover, the protein expression of p16 and cyclin Dl had a negative-correlation in gallbladder carcinoma (r = -0.9417, P<0.05). CONCLUSION: Cyclin Dl may play a role in the early stage of gallbladder carcinoma. Mutation of p16 and Rb genes might be correlated with progression of gallbladder carcinoma. Analysis of p16 and Rb can estimate the prognosis of gallbladder carcinoma. Expression of p16 and Rb may be correlated with Nevin staging and pathologic grading in gallbladder carcinoma.
基金This project was supported by Hebei significant Topic of Tackle Key Problems Grant (No. 03276198D) Hebei Technology Program Item Grant (No. 032761100D-1).
文摘Objective： To detect the changes of p16 and FHIT and investigate their relationship in esophageal squamous cell carcinoma development by measuring their expression levels in normal squamous epithelium tissue, mild, moderate, severe dysplasia lesions, carcinoma in situ and invasive squamous cell carcinomas. Methods： Expressions of p16 protein and FHIT protein were detected and analyzed in 17 cases of normal squamous epithelium, 16 cases of mild dysplasia, 16 cases of moderate dysplasia, 17 cases of severe dysplasia, 10 cases of carcinoma in situ, and 18 cases of esophageal squamous cell carcinoma by immunohistochemical method. Results： With increasing histopathologic grades, the expressions of pl6 and FHIT became gradually lower. There was no remarkable difference of p16 and FHIT expressions between the normal and mild dysplasia group （P〉0.05）, but the differences between the normal and other groups were all significant （P〈0.05）. There was no remarkable difference among the squamous cell carcinoma group, the moderate and severe dysplasia groups, and the carcinoma in situ group （P〉0.05）, but significant differences existed in the expressions of p16 and FHIT proteins between the squamous cell carcinoma and the normal groups, and between the squamous cell carcinoma and the mild dysplasia groups （P〈0.05）. There was an association of descending trend between p16 and FHIT protein expressions. Conclusion： Reduced expressions of pl6 and/or FHIT proteins possible play an important role in the early occurrence of esophageal cancer. There was a positive correlation between the expressions of p16 and FHIT proteins.
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Objective : To investigate the role and clinical significance of p16 protein in Condyloma Acuminatum (CA) and its cancerization. Methods: The expression of p16 protein was tested in 33 CA samples and 7 cancerized CA samples by immunohistochemical assays. Results: There was abnormal expression of p16 protein in CA and cancerized CA, mainly major protein expression. The p16 protein expresseed in different locations in different cases was as follows: In basal layer cells in normal cuits; in spinous layer, granular layer and stratum corneum layer cells in CA;in keratin pearl peripheral and spinous layer cells in cancerized CA. Conclusion.. There was major expression of p16 protein in CA and cancerized CA, and these protein of the two groups might not naturally be the same. Our study indicated that in clinical practice, when major p16 protein expression in CA occurs, it's risk of cancerization shoud be suspected.
文摘The mechanism and interaction among Rb/p16, Rb/E2F1 and HDAC1 proteins in gallbladder carcinoma were investigated. By using the immunoprecipitation method, the interactions among Rb, p16, E2F1, HDAC1 proteins in gallbladder carcinoma cell line （Mz-ChA-1） were studied. It was found that there were Rb and E2F1 proteins in the precipitates with anti-HDAC1, and there were HDAC1 and E2F1 proteins in the precipitate with anti-Rb. It was concluded that there are specific interactions among Rb, HDAC1 and E2F1 proteins in gallbladder carcinoma, indicating the existence of the direct Rb/E2F1/HDAC1 signal transduction pathway. There is no direct relationship between p16 proteins with Rb, HDAC1, and E2F1 proteins.
