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The purpose of this study was to determine the concentration polarization of high-density lipoprotein (HDL) at the surface of the carotid artery under conditions of steady flow and to establish its relationship with shear stress using an in vitro vascular simulation model of carotid bifurcation. Shear stress, HDL concentration at the surface, and the ratio(More)
To understand the local hemodynamics of modified TF-AHCB carotid bifurcation model, using particle image velocimetry technique to measure the instantaneous velocity distribution of the model attatched to a circuit. The velocity was controlled by regulating the height of the reservoir. The working fluid consists of glycerine and water mixture with viscosity(More)
AIM The aim of this study was to explore whether transmembrane flow shear stress could regulate eNOS expression and mediate endothelial cell function via SR-B1 signaling transduction. METHODS Parallel-plate flow chamber was used to impose laminar shear stress and evaluate the effect of shear stress upon human umbilical vein endothelial cells (HUVECs). The(More)
OBJECTIVE To review the current status and problems in developing cardiac biological pacemaker (CBP) by cell transplantation. METHODS The literature over the past decade concerning CBP constructed through cell transplantation was reviewed and summarized. RESULTS Experiments in vivo testified that the cell transplantation was feasible for CBP(More)
OBJECTIVE To investigate whether Akt1 gene transfection mediated by recombinant lentivirus (LVs) in the bone marrow mesenchymal stem cells (BMSCs) could enhance the ability of hypoxia tolerance so as to provide a theoretical basis for improving the effectiveness of stem cells transplantation. METHODS LVs was used as transfection vector, enhanced green(More)
OBJECTIVE To observe the change of sino-atrial nodal tissue structure and ectopic pacing function after xenogenic sino-atrial nodal tissue transplanted into left ventricular wall, so as to provide new ideas for the treatment of sick sinus syndrome and severe atrioventricular block. METHODS Seventy healthy rabbits were selected, male or female, and(More)
OBJECTIVE To investigate the expression of connexin 40 (Cx40) and hyperpolarization-activated cyclic nucleotide-gated cation channel 4 (HCN4) in rat bone marrow mesenchymal stem cells (BMSCs) cocultured with the sinoatrial node (SAN) tissues in vitro, so as to evaluate the possibility of BMSCs differentiation into SAN cells. METHODS BMSCs were isolated(More)
The present paper is to research the expression level of the mRNA of scavenger receptor class B type 1-receptor of high-density lipoprotein in endothelial cells after being treated by different shear stress. The second to fourth generations of the cultured human umbilical vein endothelial cells (HUVECs) were used in the experiment. The cells were divided(More)
OBJECTIVE To investigate the feasibility of recombinant lentivirus (LVs) mediated hyperpolarization-activated cyclic nucleotide-gated cation channel 4 (HCN4) gene transfecting rat bone mesenchymal stem cells (BMSCs) so as to construct the biological pacemaker cells. METHODS Sprague Dawley rats at the age of 3-5 weeks were selected to isolate and culture(More)
Previous research has observed concentration polarization in LDL and HDL in the arterial system. However, there is no report that links this concentration polarization to the development of vascular atherosclerosis (AS). Therefore, the purpose of this study is to establish the relationship between concentration difference of LDL and HDL and shear stress(More)