Engineered Cardiac Microtissues Using Trace Silicon Nanowires To Improve Functional Maturity
SUMMARY
A trace amount of electrically conductive silicon nanowires (e-SiNWs) into otherwise scaffold-free hiPSC-derived cardiomyocyte spheroids to improve electrical coupling, synchronized beating, calcium handling, and structural maturation.
The Unmet Need: Human iPSC-derived cardiomyocytes are widely used but remain functionally immature, limiting their predictive value in drug screening and their usefulness for engineered cardiac repair
- Heart disease remains a leading cause of death, and damaged myocardium has limited natural regenerative capacity. [source: Nano Letters manuscript] Human induced pluripotent stem cell-derived cardiomyocytes offer a scalable source of human cardiac cells for research and potential therapy, but these cells typically retain immature structural and functional properties. Their limited maturation can reduce contractile strength, impair coordinated electrical behavior, and constrain their value in disease modeling, safety screening, and tissue repair.
- Traditional tissue-engineering approaches often rely on scaffolds, hydrogels, or external stimulation systems to improve maturation, but these approaches can add complexity and may not fully recreate native cardiac microenvironments. Scaffold-free cardiac spheroids are attractive because they are simpler and more tissue-like, yet they often beat in a poorly coordinated manner.
The Proposed Solution: A method using trace electrically conductive silicon nanowires to create scaffold-free cardiac microtissues with improved electrical coupling, synchronized contraction, and enhanced maturation of hiPSC-derived cardiomyocytes
- The faculty inventor developed a method using a very small amount of electrically conductive silicon nanowires to otherwise scaffold-free cardiac spheroids. these nanowires formed conductive bridges in the extracellular space and improved contraction amplitude, synchronization, calcium handling, and maturation-associated markers in hiPSC-derived cardiomyocyte spheroids. The approach may therefore improve the performance of human cardiac microtissues used in preclinical screening and could also support longer-term development of engineered cardiac grafts. The technology is especially relevant where coordinated beating and functional maturity are important commercial attributes.
ADVANTAGES
- Enhances functional maturation of hiPSC-derived cardiomyocytes
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Improves synchronized contraction in 3D spheroids
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Uses trace material loading rather than bulk scaffolds
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Compatible with scaffold-free cardiac microtissue formats
APPLICATIONS
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Cardiotoxicity screening
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Phenotypic drug screening
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Patient-specific disease modeling
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Cardiac organ-on-chip systems
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Engineered cardiac patches or grafts
PUBLICATIONS