Spatiotemporal remodeling of embryonic aortic arch: stress distribution, microstructure, and vascular growth in silico.

Biomechanics and Modeling in Mechanobiology
S Samaneh LashkariniaKerem Pekkan

Abstract

The microstructure for mature vessels has been investigated in detail, while there is limited information about the embryonic stages, in spite of their importance in the prognosis of congenital heart defects. It is hypothesized that the embryonic vasculature represents a disorganized but dynamic soft tissue, which rapidly evolves toward a specialized multi-cellular vascular structure under mechanical loading. Here the microstructural evolution process of the embryonic pharyngeal aortic arch structure was simulated using an in ovo validated long-term growth and remodeling computational model, implemented as an in-house FEBio plug-in. Optical coherence tomography-guided servo-null pressure measurements are assigned as boundary conditions through the critical embryonic stages. The accumulation of key microstructural constituents was recorded through zoom confocal microscopy for all six embryonic arch arteries simultaneously. The total amount and the radial variation slope of the collagen along the arch wall thickness in different arch types and for different embryonic times, with different dimension scales, were normalized and compared statistically. The arch growth model shows that the stress levels around the lumen boundary incr...Continue Reading

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Citations

Feb 5, 2021·Journal of Biomechanics·S Samaneh LashkariniaKerem Pekkan
Feb 13, 2021·Journal of Cardiovascular Development and Disease·Huseyin Enes Salman, Huseyin Cagatay Yalcin
Aug 27, 2021·Journal of Cardiovascular Development and Disease·Laura A Dyer, Sandra Rugonyi

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