Cited by 666Tissue Engineering and Regenerative MedicinePluripotent Stem Cells ResearchCongenital heart defects research

Growth of engineered human myocardium with mechanical loading and vascular coculture

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Tulloch, Nathaniel L., Muskheli, Veronica, Razumova, Maria V., Korte, F. Steven, Regnier, Michael, Hauch, Kip D., Pabon, Lil, Reinecke, Hans +1 more·2011·Circulation Research

Abstract

Rationale: The developing heart requires both mechanical load and vascularization to reach its proper size, yet the regulation of human heart growth by these processes is poorly understood. Objective: We seek to elucidate the responses of immature human myocardium to mechanical load and vascularization using tissue engineering approaches. Methods and Results: Using human embryonic stem cell and human induced pluripotent stem cell–derived cardiomyocytes in a 3-dimensional collagen matrix, we show that uniaxial mechanical stress conditioning promotes 2-fold increases in cardiomyocyte and matrix fiber alignment and enhances myofibrillogenesis and sarcomeric banding. Furthermore, cyclic stress conditioning markedly increases cardiomyocyte hypertrophy (2.2-fold) and proliferation rates (21%) versus unconditioned constructs. Addition of endothelial cells enhances cardiomyocyte proliferation under all stress conditions (14% to 19%), and addition of stromal supporting cells enhances formation of vessel-like structures by ≈10-fold. Furthermore, these optimized human cardiac tissue constructs generate Starling curves, increasing their active force in response to increased resting length. When transplanted onto hearts of athymic rats, the human myocardium survives and forms grafts closely apposed to host myocardium. The grafts contain human microvessels that are perfused by the host coronary circulation. Conclusions: Our results indicate that both mechanical load and vascular cell coculture control cardiomyocyte proliferation, and that mechanical load further controls the hypertrophy and architecture of engineered human myocardium. Such constructs may be useful for studying human cardiac development as well as for regenerative therapy.

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Crossref · 10.1161/circresaha.110.237206

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Authors
Tulloch, N. L., Muskheli, V., Razumova, M. V., Korte, F. S., Regnier, M., Hauch, K. D., Pabon, L., Reinecke, H., & Murry, C. E.
Affiliations
University of Washington (US)
Venue
Circulation Research
Published
2011-06-24
Volume
109
Issue
1
Pages
47-59
ISSN
  • 0009-7330 (ISSN-L)
  • 1524-4571
OpenAlex
W2163068618
Cited by
666
References
72
Citations by year
2026: 12 · 2025: 28 · 2024: 26 · 2023: 30 · 2022: 27 · 2021: 59 · 2020: 42 · 2019: 56 · 2018: 43 · 2017: 66 · 2016: 57 · 2015: 51 · 2014: 54 · 2013: 57 · 2012: 45
FWCI
54.20
Type
journal article
Language
en
Open access
Locations
  • Circulation Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (1u24dk076126-01, 5r01hl064387-10)
  • National Heart, Lung, and Blood Institute (R01-HL064387, R01 HL64387, T32HL007312, P01HL094374, R01HL084642)
  • National Institute of General Medical Sciences (P01GM081619)
  • National Institute of Diabetes and Digestive and Kidney Diseases (U24-DK076126)
Topics
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Congenital heart defects research
Keywords
mechanical loading, vascularization, cardiomyocyte hypertrophy, cardiomyocyte proliferation, myofibrillogenesis, collagen matrix, endothelial cells, stromal cells, Starling curve, heart development, regenerative therapy, human embryonic stem cell-derived cardiomyocytes, iPSC-derived cardiomyocytes
MeSH terms
Animals, Animals, Newborn, Biomechanical Phenomena, Cells, Cultured, Extracellular Matrix, Humans, Rats, Inbred F344, Stress, Mechanical, Coculture Techniques, Tissue Engineering, Myocytes, Cardiac, Pluripotent Stem Cells, Endothelial Cells, Cell Proliferation, Rats, Embryonic Stem Cells

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