ObjectiveTo examine the gene and protein expression of CD11b, L selectin and CD45, and the relationship between their expression and leukocytopenia during a hemodialysis session Methods Ten maintenance hemodialysis...ObjectiveTo examine the gene and protein expression of CD11b, L selectin and CD45, and the relationship between their expression and leukocytopenia during a hemodialysis session Methods Ten maintenance hemodialysis patients, 20 uremic non dialysis patients and 10 healthy volunteers were included in this study The mRNA expression of CD11b, L selectin and CD45 in peripheral blood mononuclear cells was detected by RT PCR, while cell surface expression of these molecules on monocytes was detected by flow cytometry and leukocyte number was counted manually Results After the start of dialysis, both mRNA expression and cell surface expression of CD11b increased rapidly, while those of L selectin and leukocyte number fell The mRNA expression of CD45 first decreased and the cell surface expression increased, followed by a return to pre dialysis levels, by the end of dialysis Conclusions Hemodialysis using a cuprophane membrane can induce rapid upregulation of CD11b and down regulation of L selectin, which might influence the normal adhesion and anti inflammatory response of leukocytes In this process CD45 may play a role in regulating and/or transducing activation signal展开更多
Objective To observe whether homocysteine can directly alter the expressions of CD11b, CD18, CD14 and Lselectin on neutrophils, monocytes, and lymphocytes in whole blood from healthy human subjectsMethods Leukocyte su...Objective To observe whether homocysteine can directly alter the expressions of CD11b, CD18, CD14 and Lselectin on neutrophils, monocytes, and lymphocytes in whole blood from healthy human subjectsMethods Leukocyte surface adhesive molecule expressions were analyzed by immunofluorescence flow cytometry Results Homocysteine at the lowest concentration (20μmol/L) significantly increased surface adhesive molecule expressions of CD11b and CD18 on each cell type and CD14 on monocytes and neutrophils in whole blood These effects were increased at homocysteine concentrations of 200 and 400μmol/L, but at concentrations 1mmol/L, CD11b/CD18 and CD14 expressions on all types of leukocytes were decreased Lselectin expression was slightly decreased on all cell types in whole blood by homocysteineConclusion Homocysteine alters leukocyte expressions of CD11b/CD18, CD14 and Lselectin on leukocytes, which may be involved into homocysteineinduced leukocyte adhesion and migration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ObjectiveTo examine the gene and protein expression of CD11b, L selectin and CD45, and the relationship between their expression and leukocytopenia during a hemodialysis session Methods Ten maintenance hemodialysis patients, 20 uremic non dialysis patients and 10 healthy volunteers were included in this study The mRNA expression of CD11b, L selectin and CD45 in peripheral blood mononuclear cells was detected by RT PCR, while cell surface expression of these molecules on monocytes was detected by flow cytometry and leukocyte number was counted manually Results After the start of dialysis, both mRNA expression and cell surface expression of CD11b increased rapidly, while those of L selectin and leukocyte number fell The mRNA expression of CD45 first decreased and the cell surface expression increased, followed by a return to pre dialysis levels, by the end of dialysis Conclusions Hemodialysis using a cuprophane membrane can induce rapid upregulation of CD11b and down regulation of L selectin, which might influence the normal adhesion and anti inflammatory response of leukocytes In this process CD45 may play a role in regulating and/or transducing activation signal
文摘Objective To observe whether homocysteine can directly alter the expressions of CD11b, CD18, CD14 and Lselectin on neutrophils, monocytes, and lymphocytes in whole blood from healthy human subjectsMethods Leukocyte surface adhesive molecule expressions were analyzed by immunofluorescence flow cytometry Results Homocysteine at the lowest concentration (20μmol/L) significantly increased surface adhesive molecule expressions of CD11b and CD18 on each cell type and CD14 on monocytes and neutrophils in whole blood These effects were increased at homocysteine concentrations of 200 and 400μmol/L, but at concentrations 1mmol/L, CD11b/CD18 and CD14 expressions on all types of leukocytes were decreased Lselectin expression was slightly decreased on all cell types in whole blood by homocysteineConclusion Homocysteine alters leukocyte expressions of CD11b/CD18, CD14 and Lselectin on leukocytes, which may be involved into homocysteineinduced leukocyte adhesion and migration
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.
