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Related Experiment Video

Updated: Jul 8, 2025

Isolation of Mouse Interstitial Valve Cells to Study the Calcification of the Aortic Valve In Vitro
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Multiscale computational modeling of aortic valve calcification.

Javid Azimi-Boulali1, Gretchen J Mahler2, Bruce T Murray1

  • 1Department of Mechanical Engineering, Binghamton University, Binghamton, NY, 13902, USA.

Biomechanics and Modeling in Mechanobiology
|December 13, 2023
PubMed
Summary

Calcific aortic valve disease (CAVD) involves calcium buildup on heart valves. A new computational model shows cell death from fibrosis and calcification contributes to nodule formation and disease progression.

Keywords:
Aortic valveCAVDCalcificationEndMTMultiscale modelingSystems biology

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Area of Science:

  • Cardiovascular biology
  • Computational modeling
  • Biomedical engineering

Background:

  • Calcific aortic valve disease (CAVD) is a prevalent cardiovascular condition impacting millions globally.
  • The exact mechanisms driving CAVD pathogenesis remain incompletely understood, though transforming growth factor beta (TGF-β) signaling is implicated.
  • CAVD leads to aortic valve stenosis and potential heart failure if untreated.

Purpose of the Study:

  • To develop a multiscale computational model simulating TGF-β-stimulated CAVD.
  • To integrate cellular dynamics, subcellular signaling, and tissue-level chemical diffusion.
  • To investigate the roles of endothelial-to-mesenchymal transition (EndMT), fibrosis, and calcification in CAVD.

Main Methods:

  • Developed a multiscale computational model incorporating cellular behavior, subcellular signaling (TGF-β pathway), and tissue diffusion.
  • Modeled key CAVD processes: EndMT, fibrosis, and calcification.
  • Simulated cell nutrient deprivation and subsequent calcium nodule formation.

Main Results:

  • Identified cell death due to nutrient deprivation in fibrotic/calcified regions as a source of calcium nodules.
  • Observed that cell death contributes to a varied distribution of nodule sizes.
  • Found increased fibrosis and calcification near the endothelial layer due to higher cell activity.

Conclusions:

  • The study provides insights into CAVD mechanisms and TGF-β signaling.
  • Cellular processes and nutrient dynamics are critical in CAVD progression.
  • The multiscale modeling framework offers a tool for studying complex diseases and developing therapeutic strategies for CAVD and related conditions like cancer.