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Biological Markers of Atherogenesis Correlate With Both Shear and Mural Stress in Perfused Arterial Segments Exposed to Cyclic Axial Stretching Ex Vivo

[+] Author Affiliations
J. Scott VanEpps, Douglas W. Chew, David A. Vorp

University of Pittsburgh, Pittsburgh, PA

Paper No. SBC2007-176674, pp. 235-236; 2 pages
  • ASME 2007 Summer Bioengineering Conference
  • ASME 2007 Summer Bioengineering Conference
  • Keystone, Colorado, USA, June 20–24, 2007
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-4798-5
  • Copyright © 2007 by ASME


While documented risk factors (e.g., hypertension, diabetes, etc.) for atherosclerosis are systemic in nature, atherosclerotic plaques appear in a heterogeneous distribution in the vasculature [1]. Certain arteries (e.g., coronary arteries) are exposed to cyclic deformations such as stretching, bending, and twisting due to their being tethered to surrounding tissue beds [2]. Such stimuli likely results in spatially-varying biomechanical stresses and may be a key modulator of atherosclerotic lesion localization [3]. We have developed a unique methodology for combining ex vivo experimental perfusion of arterial segments with computational modeling. Using this methodology we examined the hypothesis that local variations in shear and mural stress associated with cyclic axial stretch of arterial segments influence the distribution of endothelial permeability and the expression of various genes associated with atherogenesis.

Copyright © 2007 by ASME



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