Spatial comparison between wall shear stress measures and porcine arterial endothelial permeability.

Published

Journal Article

A better understanding of how hemodynamic factors affect the integrity and function of the vascular endothelium is necessary to appreciate more fully how atherosclerosis is initiated and promoted. A novel technique is presented to assess the relation between fluid dynamic variables and the permeability of the endothelium to macromolecules. Fully anesthetized, domestic swine were intravenously injected with the albumin marker Evans blue dye, which was allowed to circulate for 90 min. After the animals were euthanized, silicone casts were made of the abdominal aorta and its iliac branches. Pulsatile flow calculations were subsequently made in computational regions derived from the casts. The distribution of the calculated time-dependent wall shear stress in the external iliac branches was directly compared on a point-by-point basis with the spatially varying in vivo uptake of Evans blue dye in the same arteries. The results indicate that in vivo endothelial permeability to albumin decreases with increasing time-average shear stress over the normal range. Additionally, endothelial permeability increases slightly with oscillatory shear index.

Full Text

Cited Authors

  • Himburg, HA; Grzybowski, DM; Hazel, AL; LaMack, JA; Li, X-M; Friedman, MH

Published Date

  • May 2004

Published In

Volume / Issue

  • 286 / 5

Start / End Page

  • H1916 - H1922

PubMed ID

  • 14715506

Pubmed Central ID

  • 14715506

Electronic International Standard Serial Number (EISSN)

  • 1522-1539

International Standard Serial Number (ISSN)

  • 0363-6135

Digital Object Identifier (DOI)

  • 10.1152/ajpheart.00897.2003

Language

  • eng