A computational bridge between traction force microscopy and tissue contraction

被引:3
|
作者
Flanary, Shannon M. [1 ]
Jo, Seokwon [2 ]
Ravichandran, Rohit [1 ]
Alejandro, Emilyn U. [2 ]
Barocas, Victor H. [3 ]
机构
[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA
[2] Univ Minnesota, Dept Integrat Biol & Physiol, Minneapolis, MN 55455 USA
[3] Univ Minnesota, Dept Biomed Engn, Minneapolis, MN 55455 USA
关键词
VASCULAR SMOOTH-MUSCLE; THORACIC AORTIC-ANEURYSMS; EXTRACELLULAR-MATRIX; STRESS; MODEL;
D O I
10.1063/5.0157507
中图分类号
O59 [应用物理学];
学科分类号
摘要
Arterial wall active mechanics are driven by resident smooth muscle cells, which respond to biological, chemical, and mechanical stimuli and activate their cytoskeletal machinery to generate contractile stresses. The cellular mechanoresponse is sensitive to environmental perturbations, often leading to maladaptation and disease progression. When investigated at the single cell scale, however, these perturbations do not consistently result in phenotypes observed at the tissue scale. Here, a multiscale model is introduced that translates microscale contractility signaling into a macroscale, tissue-level response. The microscale framework incorporates a biochemical signaling network along with characterization of fiber networks that govern the anisotropic mechanics of vascular tissue. By incorporating both biochemical and mechanical components, the model is more flexible and more broadly applicable to physiological and pathological conditions. The model can be applied to both cell and tissue scale systems, allowing for the analysis of in vitro, traction force microscopy and ex vivo, isometric contraction experiments in parallel. When applied to aortic explant rings and isolated smooth muscle cells, the model predicts that active contractility is not a function of stretch at intermediate strain. The model also successfully predicts cell-scale and tissue-scale contractility and matches experimentally observed behaviors, including the hypercontractile phenotype caused by chronic hyperglycemia. The connection of the microscale framework to the macroscale through the multiscale model presents a framework that can translate the wealth of information already collected at the cell scale to tissue scale phenotypes, potentially easing the development of smooth muscle cell-targeting therapeutics.
引用
收藏
页数:15
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