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Title: Stretch-induced intussuceptive and sprouting angiogenesis in the chick chorioallantoic membrane
Authors: Belle J.
Ysasi A.
Bennett R.
Filipovic, Nenad
Nejad M.
Trumper D.
Ackermann M.
Wagner W.
Konerding M.
Mentzer S.
Issue Date: 2014
Abstract: © 2014 Elsevier Inc. Vascular systems grow and remodel in response to not only metabolic needs, but also mechanical influences as well. Here, we investigated the influence of tissue-level mechanical forces on the patterning and structure of the chick chorioallantoic membrane (CAM) microcirculation. A dipole stretch field was applied to the CAM using custom computer-controlled servomotors. The topography of the stretch field was mapped using finite element models. After 3. days of stretch, Sholl analysis of the CAM demonstrated a 7-fold increase in conducting vessel intersections within the stretch field (p. <. 0.01). The morphometric analysis of intravital microscopy and scanning electron microscopy (SEM) images demonstrated that the increase vessel density was a result of an increase in interbranch distance (p. <. 0.01) and a decrease in bifurcation angles (p. <. 0.01); there was no significant increase in conducting vessel number (p. >. 0.05). In contrast, corrosion casting and SEM of the stretch field capillary meshwork demonstrated intense sprouting and intussusceptive angiogenesis. Both planar surface area (p. <. 0.05) and pillar density (p. <. 0.01) were significantly increased relative to control regions of the CAM. We conclude that a uniaxial stretch field stimulates the axial growth and realignment of conducting vessels as well as intussusceptive and sprouting angiogenesis within the gas exchange capillaries of the ex ovo CAM.
Type: article
DOI: 10.1016/j.mvr.2014.06.009
ISSN: 0026-2862
SCOPUS: 2-s2.0-84922263224
Appears in Collections:Faculty of Engineering, Kragujevac

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