The relationship between the changes of proangiogenic factors serum concentrations and progression of pancreatic carcinoma patients / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate the relationship between VEGF, bFGF and IGF-1 serum concentration and progression of pancreatic carcinoma.</p><p><b>METHODS</b>Fifty-six patients with pancreatic carcinoma were divided into resectable group (n = 32) and unresectable group (n = 24). Another group was normal group (n = 20). The expression and significance of these proangiogenic factors were respectively analyzed in different groups.</p><p><b>RESULTS</b>For pancreatic carcinoma group, concentrations of VEGF and bFGF were significantly higher than these of normal group (P < 0.01). Serum VEGF was significantly correlated with the resection of pancreatic carcinoma (P < 0.05) while bFGF and IGF were not. According to univariate analysis, serum VEGF was correlated with tumor grade, nodal disease, vascular invasion, distant metastases and tumor stage. Serum bFGF was associated with tumor size and grade. Serum IGF-1 was correlated with vascular invasion.</p><p><b>CONCLUSIONS</b>Angiogenic factors play important roles in growth, invasion and metastasis. Detection of serum proangiogenic factors may have potential value in diagnosis and prognosis of pancreatic carcinoma.</p>

Relationship between changes of serum concentrations of antiangiogenic factors and disease progression in patients of pancreatic carcinoma / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate the relationship between TSP-1, Angiostatin and Endostatin serum concentrations and progression of pancreatic adenocarcinoma.</p><p><b>METHODS</b>Fifty-six patients with suspected pancreatic cancer were enrolled in the study and divided into resectable group (n = 32) and unresectable group (n = 24) according to evaluation and staging with dual phase helical CT. Histopathologic examinations included postoperative final pathology and preoperative fine needle biopsies. Peripheral blood concentrations of antiangiogenic factors Angiostatin, Endostatin and TSP-1 were detected by using ELISA methods, selecting samples of health people as a control.</p><p><b>RESULTS</b>Serum concentrations of antiangiogenic factors in pancreatic cancer group were significantly higher than those in health group (P < 0.01). Serum concentrations of Endostatin, Angiostatin and TSP-1 were significantly increased in unresectable group, and highly expressed in patients whom tumor sizes were greater than 2 cm and tumor invaded peripancreatic great vessels (P < 0.05). After operation, serum concentrations of Endostatin, Angiostatin and TSP-1 significantly decreased (P < 0.05). There were no significant difference between I, II stage group and III, IV group.</p><p><b>CONCLUSIONS</b>Detection of serum concentrations of antiangiogenic factors may be used to evaluate the resectability of pancreatic cancer and may play important roles in growth, invasion and metastasis of pancreatic cancer.</p>

Effects of scorpion venom active peptides on the concentration of PGI_2 and NO secreated by human umbilical vein endothelical cells / 中国临床药理学与治疗学

Aim To further research into the antithrombotic mechanism of scorpion venom active peptides (SVAP). Methods Human umbilical vein endothelial cells (HUVEC) were cultured with enzyme digestive method. After the cultured HUVC was incubated in conditioned media for 1 hour, the effects of SVAP on the concentration of 6-Keto-PGF 1? and NO of HUVEC were determined with radioactive-immunolygic and nitrate reduction enzyme method respectively. Results As compared with control, SVAP in the doses of 1,5,10, 20 mg?L -1 had the distinctive increase of 54%, 68%,72%,79% of the concentration of 6-Keto-PGF 1? and SVAP in the doses of 10, 20 mg?L -1 had the significantly increased of 27%, 46% of the concentration of NO. Regression anylysis showed that the release levels of PGI 2 and NO in HUVEC induced by SVAP was of positive correlation. Conclusion Antithrombotic mechanism of SVAP is related to the increase of PGI 2 and NO released from HUVEC and synergistic and mediating action between NO and PGI 2.