Auxetic cardiac patches with tunable mechanical and conductive properties toward treating myocardial infarction

Kapnisi, M., Mansfield, C., Marijon, C., Guex, A.G., Perbellini, F., Bardi, I., Humphrey, E.J., Puetzer, J.L., Mawad, D., Koutsogeorgis, D.C. ORCID: 0000-0001-6167-1084, Stuckey, D.J., Terracciano, C.M., Harding, S.E. and Stevens, M.M., 2018. Auxetic cardiac patches with tunable mechanical and conductive properties toward treating myocardial infarction. Advanced Functional Materials, 28 (21): 1800618. ISSN 1616-301X

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Abstract

An auxetic conductive cardiac patch (AuxCP) for the treatment of myocardial infarction (MI) is introduced. The auxetic design gives the patch a negative Poisson's ratio, providing it with the ability to conform to the demanding mechanics of the heart. The conductivity allows the patch to interface with electroresponsive tissues such as the heart. Excimer laser microablation is used to micropattern a re-entrant honeycomb (bow-tie) design into a chitosan-polyaniline composite. It is shown that the bow-tie design can produce patches with a wide range in mechanical strength and anisotropy, which can be tuned to match native heart tissue. Further, the auxetic patches are conductive and cytocompatible with murine neonatal cardiomyocytes in vitro. Ex vivo studies demonstrate that the auxetic patches have no detrimental effect on the electrophysiology of both healthy and MI rat hearts and conform better to native heart movements than unpatterned patches of the same material. Finally, the AuxCP applied in a rat MI model results in no detrimental effect on cardiac function and negligible fibrotic response after two weeks in vivo. This approach represents a versatile and robust platform for cardiac biomaterial design and could therefore lead to a promising treatment for MI.

Item Type:	Journal article
Publication Title:	Advanced Functional Materials
Creators:	Kapnisi, M., Mansfield, C., Marijon, C., Guex, A.G., Perbellini, F., Bardi, I., Humphrey, E.J., Puetzer, J.L., Mawad, D., Koutsogeorgis, D.C., Stuckey, D.J., Terracciano, C.M., Harding, S.E. and Stevens, M.M.
Publisher:	Wiley - V C H Verlag GmbH & Co. KGaA
Date:	24 May 2018
Volume:	28
Number:	21
ISSN:	1616-301X
Identifiers:	Number Type 10.1002/adfm.201800618 DOI
Rights:	© 2018 the authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	02 May 2018 08:56
Last Modified:	18 Jul 2019 14:43
URI:	https://irep.ntu.ac.uk/id/eprint/33419

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