# Modeling myosin mechanobiology towards understanding the mechanisms of hypertrophic cardiomyopathy

> **NIH NIH K99** · STANFORD UNIVERSITY · 2021 · $166,320

## Abstract

PROJECT SUMMARY: This proposed project focuses on understanding how mutations in beta cardiac myosin
with diverse and often opposing effects on myosin molecular function contribute to similar disease phenotypes
of hypertrophic cardiomyopathy (HCM): cardiomyocyte (CM) hypertrophy, hypercontractility, and tissue fibrosis.
Understanding disease mechanisms and the heterogeneity of phenotypes across multiple scales
(molecular, cellular, and clinical) will enable the development of better and more individualized therapies
for patients with HCM. The first aim of this proposal will clarify the mechanisms by which altered intracellular
forces affect intracellular signaling and CM hypertrophy. The second aim will use computational modeling to
examine how alterations to interrelated parameters of myosin function change force production temporally and
spatially. The third aim will define how altered extracellular mechanics affect CM and cardiac fibroblast
phenotypes. The proposal uses several innovative molecular, cellular, bioengineering, and computational
modeling tools to examine and contextualize the role of altered cellular mechanics in driving changes in cardiac
cell phenotypes. CRISPR/Cas9 gene editing in human induced pluripotent stem cells provides a model system
to investigate the effects of specific mutations in a dynamic cellular context. Micropatterned engineered platforms
will be used to improve myofibril alignment and allow direct measurement of intracellular force production by
traction force microscopy. Molecular biology and transcriptomic techniques will be used to measure changes in
intracellular signaling and gene expression in response to mechanical perturbation. Another innovation is the
novel application of a vinculin tension sensor FRET probe to directly measure intracellular forces at sarcomere
Z disks and at cellular adhesions. Together these platforms will allow direct validation of temporal and spatial
cellular forces predicted using computational modeling (molecular myosin models and cell-specific finite element
models). Finally, investigating the effect of altered extracellular mechanics on CM function and cardiac fibroblast
activation in engineered environments will give insights into the effects of fibrotic remodeling. The research and
career development training plans will enable the transition of Dr. Vander Roest to an independent
career. During the mentored (K99 phase) of this proposal, Dr. Vander Roest will develop technical skills in
molecular biomechanics, FRET measurements, and transcriptome analysis, and expand her skills in
computational modeling in the context of cardiac disease. This training will take place at Stanford University,
under the mentorship of Drs. Bernstein and Spudich, as well as an expert trans-disciplinary advisory committee,
including 2 experts in computational modeling (Drs. Regnier and Campbell). The development of these skills will
support the research plan for the independent phase of this proje...

## Key facts

- **NIH application ID:** 10301337
- **Project number:** 1K99HL153679-01A1
- **Recipient organization:** STANFORD UNIVERSITY
- **Principal Investigator:** Alison Schroer Vander Roest
- **Activity code:** K99 (R01, R21, SBIR, etc.)
- **Funding institute:** NIH
- **Fiscal year:** 2021
- **Award amount:** $166,320
- **Award type:** 1
- **Project period:** 2021-08-15 → 2023-07-31

## Primary source

NIH RePORTER: https://reporter.nih.gov/project-details/10301337

## Citation

> US National Institutes of Health, RePORTER application 10301337, Modeling myosin mechanobiology towards understanding the mechanisms of hypertrophic cardiomyopathy (1K99HL153679-01A1). Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/grant/nih/10301337. Licensed CC0.

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