bFGF对人肝癌细胞系Bel-7402的生长调控

Expression of p21WAF1 and Bax in gastrointestinal stromal tumors and its clinical significance

AIM: To investigate the relationship between the expression of p21WAF1 and Bax and clinicopathologic characteristics in gastrointestinal stromal tumors (GIST), and to analyze the role of p21WAF1 and Bax in GIST.

METHODS: Immunohistochemical SP method was used to detect p21WAF1 and Bax expression in 40 cases of GIST.

RESULTS: p21WAF1 was expressed in the nucleus of 21 cases of GIST (52.5%), and Bax was expressed in the cytoplasm of 22 patients (55.0%). The expression of p21WAF1 and Bax had no significant relationship with sex, age of patients, as well as localization, size, necrosis, histological typing of GIST, but it significantly related to histological grading (χ² = 20.217, P = 0.000 < 0.01; χ² = 22.896, P = 0.000 < 0.01; respectively). There were higher rates of p21WAF1 and Bax expression in potential malignant and malignant GIST than those in benign one (p21WAF1: 80.0 %, 80.0% vs 6.7%, P < 0.01; Bax: 90.0%, 80.0% vs 6.7%, P < 0.01). The difference of p21WAF1 and Bax expression between potential malignancy and malignancy was not significant. There was a positive correlation between p21WAF1 and Bax expression (r = 0.448, χ² = 8.021, P = 0.005 < 0.01, Kappa = 0.447) in GIST.

CONCLUSION: The expression of p21WAF1 and Bax plays an important role in the pathogenesis of potential malignant and malignant GIST, but not in benign GIST, which may be used as an index to differentiate benign GIST from potential malignant and malignant ones.

Expression of hPTTG1 and bFGF in gallbladder carcinoma tissue and their correlation with angiogenesis

AIM: To investigate the expression of hPTTG1 and bFGF in human gallbladder carcinoma tissues and their correlation with angiogenesis and other clinicobiological behaviors.

METHODS: The expression of hPTTG1 and bFGF in 41 cases of human gallbladder carcinoma and 22 cases of chronic cholecystitis was detected by immunohistochemical staining (SP method). The microvessels were highlighted by immunohistochemical staining (SP method) to detect antigen of CD34. Angiogenesis was represented by intratumor microvessel density (MVD).

RESULTS: In the gallbladder carcinoma, the positive rates of hPTTG1 and bFGF were 82.9% and 75.6% respectively, which were significantly higher than those in the chronic cholecystitis (P = 0.002 and 0.006). The expression of hPTTG1 was significantly associated with clinical stages and lymph node metastasis status (P = 0.025, 0.007), but not with histological differentiation (P = 0.144). The expression of bFGF was significantly correlated with clinical stages and histological differentiation (P = 0.019, 0.015), but not with lymph node metastasis status (P = 0.081). There was a significant correlation between the expression of hPTTG1 and bFGF (r = 0.648, P = 0.000). Neither of them had relation with age, sex, histological type and cholelithiasis. The value of MVD in the gallbladder carcinoma was significantly higher than that in the chronic cholecystitis (t = 3.684, P = 0.001). The expression of hPTTG1 and bFGF was correlated with MVD in gallbladder carcinoma (P = 0.000, 0.000). MVD in the gallbladder carcinoma was significantly associated with clinical stages and lymph node metastasis status (P = 0.007, 0.024), but not with age, sex, histological type, histological differentiation and cholelithiasis.

CONCLUSION: Overexpression of hPTTG1 is related to the tumorigenesis and angiogenesis in gallbladder carcinoma, which may provide a new target for therapy of gallbladdercarcinoma.