OBJECTIVE: To study the ehanges of platelet endothelial cell adhesion molecule-1 (PECAM-1) expression on polymorphonuclear leukocytes (PMNs) in peripheral circulation anti pancreatic microcirculation in rats with acut...OBJECTIVE: To study the ehanges of platelet endothelial cell adhesion molecule-1 (PECAM-1) expression on polymorphonuclear leukocytes (PMNs) in peripheral circulation anti pancreatic microcirculation in rats with acute edematous pancreatitis (AEP). METHODS: The model of AEP was established with 50 Wistar rats, and the changes of PECAM-1 expression on PMNs from the splenic vein and inferior vena cava were determined by flow cytometry. RESULTS: PECAM-I expression on PMNs showed no significant difference between pancreatic microcirculation and peripheral circulation at AEP2h and AEP4h time points. From the AEP4h to the AEP8h time point, PECAM-1 expression in peripheral circulation was up-regulated, but PECAM-1 expression in pancreatic microcirculation was down-regulated. PECAM-1 expression had a significant difference between pancreatic microcirculation and peripheral circulation at the AEP8h time point (P<0.05). CONCLUSION: PECAM-1 expression on PMNs is in a converse way between pancreatic microcirculation and peripheral circulation in AEP.展开更多
Objective: To investigate the influence of traditional Chinese medicine Qingjieling on leukocyte adhesion to vascular endothelial cells and the possible mechanisms. Methods: Firstly, We successfully established in v...Objective: To investigate the influence of traditional Chinese medicine Qingjieling on leukocyte adhesion to vascular endothelial cells and the possible mechanisms. Methods: Firstly, We successfully established in vitro culture of human umbilical vein endothelial cells (HUVEC) monolayer. Then we constructed a leukocyte-endothelial cell adhesion model and imitated the inflammation state by using endothelial cells stimulated with recombinant tumor necrosis factor a (TNFa) or interleukin-1 (IL-1 ) respectively. The drug-induced change of leukocyte adhesion function was observed after we directly administered traditional Chinese medicine Qingjieling on the leukocytes. Finally, we inquired into the molecular mechanism of the effect of Qingjieling by monoclonal antibody blocking assay. Results: HUVEC as a representative large vessel endothelial cell could perfectly construct an adhesion model with leukocytes. Under the stimulation of cytokines (TNFa or IL-1), endothelial cells demonstrated drastically improved adhesion with leukocytes, certain dose of Qingjieling (ling/g body weight) might augment the leukocyte adhesion capacity with a 2-hour co-incubation. At least part of the reason of Qingjieling's improving adhesion effect is due to the increased lymphocyte functional associated antigen-1 (LFA-1) expression of the white blood cells. Conclusion: Qingjieling could increase LFA-1-dependent leukocytes adhesion to endothelial cells.展开更多
文摘OBJECTIVE: To study the ehanges of platelet endothelial cell adhesion molecule-1 (PECAM-1) expression on polymorphonuclear leukocytes (PMNs) in peripheral circulation anti pancreatic microcirculation in rats with acute edematous pancreatitis (AEP). METHODS: The model of AEP was established with 50 Wistar rats, and the changes of PECAM-1 expression on PMNs from the splenic vein and inferior vena cava were determined by flow cytometry. RESULTS: PECAM-I expression on PMNs showed no significant difference between pancreatic microcirculation and peripheral circulation at AEP2h and AEP4h time points. From the AEP4h to the AEP8h time point, PECAM-1 expression in peripheral circulation was up-regulated, but PECAM-1 expression in pancreatic microcirculation was down-regulated. PECAM-1 expression had a significant difference between pancreatic microcirculation and peripheral circulation at the AEP8h time point (P<0.05). CONCLUSION: PECAM-1 expression on PMNs is in a converse way between pancreatic microcirculation and peripheral circulation in AEP.
文摘Objective: To investigate the influence of traditional Chinese medicine Qingjieling on leukocyte adhesion to vascular endothelial cells and the possible mechanisms. Methods: Firstly, We successfully established in vitro culture of human umbilical vein endothelial cells (HUVEC) monolayer. Then we constructed a leukocyte-endothelial cell adhesion model and imitated the inflammation state by using endothelial cells stimulated with recombinant tumor necrosis factor a (TNFa) or interleukin-1 (IL-1 ) respectively. The drug-induced change of leukocyte adhesion function was observed after we directly administered traditional Chinese medicine Qingjieling on the leukocytes. Finally, we inquired into the molecular mechanism of the effect of Qingjieling by monoclonal antibody blocking assay. Results: HUVEC as a representative large vessel endothelial cell could perfectly construct an adhesion model with leukocytes. Under the stimulation of cytokines (TNFa or IL-1), endothelial cells demonstrated drastically improved adhesion with leukocytes, certain dose of Qingjieling (ling/g body weight) might augment the leukocyte adhesion capacity with a 2-hour co-incubation. At least part of the reason of Qingjieling's improving adhesion effect is due to the increased lymphocyte functional associated antigen-1 (LFA-1) expression of the white blood cells. Conclusion: Qingjieling could increase LFA-1-dependent leukocytes adhesion to endothelial cells.
