Nanoscale cues regulate the structure and function of macroscopic cardiac tissue constructs

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Heart tissue possesses complex structural organization on multiple scales, from macro- to nano-, but nanoscale control of cardiac function has not been extensively analyzed. Inspired by ultrastructural analysis of the native tissue, we constructed a scalable, nanotopographically controlled model of myocardium mimicking the in vivo ventricular organization. Guided by nanoscale mechanical cues provided by the underlying hydrogel, the tissue constructs displayed anisotropic action potential propagation and contractility characteristic of the native tissue. Surprisingly, cell geometry, action potential conduction velocity, and the expression of a cell-cell coupling protein were exquisitely sensitive to differences in the substratum nanoscale features of the surrounding extracellular matrix. We propose that controlling cell-material interactions on the nanoscale can stipulate structure and function on the tissue level and yield novel insights into in vivo tissue physiology, while providing materials for tissue repair.
Publisher
NATL ACAD SCIENCES
Issue Date
2010-01
Language
English
Article Type
Article
Keywords

CELL-ADHESION; MUSCLE; ORGANIZATION; HYPERTROPHY; FABRICATION; TOPOGRAPHY; ANISOTROPY; SCAFFOLDS; STRETCH; MODEL

Citation

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.107, no.2, pp.565 - 570

ISSN
0027-8424
DOI
10.1073/pnas.0906504107
URI
http://hdl.handle.net/10203/102052
Appears in Collection
BiS-Journal Papers(저널논문)
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