Peer-Reviewed Journal Details
Mandatory Fields
Punchard, MA,Stenson-Cox, C,O'Cearbhaill, ED,Lyons, E,Gundy, S,Murphy, L,Pandit, A,McHugh, PE,Barron, V
2007
July
Journal Of Biomechanics
Endothelial cell response to biomechanical forces under simulated vascular loading conditions
Published
()
Optional Fields
physiological simulator endothelial cells cell morphology cell orientation gene expression FLUID SHEAR-STRESS IN-VITRO HEMODYNAMIC FORCES BIOREACTOR ATHEROSCLEROSIS MORPHOLOGY EXPRESSION PULSATILE ARTERIES STRETCH
40
3146
3154
In vivo, endothelial cells (EC) are constantly exposed to the haemodynamic forces (HF) of pressure, wall shear stress and hoop stress. The main aim of this study was to design, create and validate a novel perfusion bioreactor capable of delivering shear stress and intravascular pressure to EC it? vitro and to characterise their morphology, orientation and gene expression. Here we report the creation and validation of such a simulator and the dual application of pressure (120/60 mmHg) and low shear stress (5 dyn/cm(2)) to a monolayer of EC established on a non-compliant silicone tube. Under these conditions, EC elongated and realigned obliquely to the direction of applied shear stress in a time-dependent manner. Furthermore, randomly distributed F-actin microfilaments reorganised into long, dense stress fibres crossing the cells in a direction perpendicular to that of flow. Finally, combinatorial biomechanical conditioning of EC induced the expression of the inflammatory-associated E-selectin gene. (c) 2007 Elsevier Ltd. All rights reserved.
DOI 10.1016/j.jbiomech.2007.03.029
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