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Rationally Designed Anisotropic and Auxetic Hydrogel Patches for Adaptation to Dynamic Organs.

Authors :
Chansoria, Parth
Blackwell, John
Etter, Emma L.
Bonacquisti, Emily E.
Jasiewicz, Natalie
Neal, Taylor
Kamal, Sarah Alhajli
Hoque, Jiaul
Varghese, Shyni
Egan, Thomas
Nguyen, Juliane
Source :
Advanced Functional Materials. 10/21/2022, Vol. 32 Issue 43, p1-15. 15p.
Publication Year :
2022

Abstract

Current hydrogel or fabric patches for organ repair are generally not designed to conform to the complex mechanics of dynamic organs such as the lung or heart. This study presents a new, biocompatible and bilayered, hydrogel‐based patch platform, consisting of a non‐fouling top layer and a cell adhesive bottom layer, that caters to the anisotropic and auxetic characteristics of dynamic organs. Integrated computational and experimental studies are used to screen over 116 unique anisotropic‐auxetic architectures to establish design rules and tailor the patches to a broad range of target organ dynamics. The patches are then validated in ex vivo and in vivo animal models, where the auxetic patches outperformed non‐auxetic patches in conforming to the volumetric dilation‐contraction of dynamic organs. To further expand the functionality of the auxetic patch platform, novel hole‐filling auxetic patches are developed. These hole‐filling patches composited with fibrin robustly reduce pulmonary air leakage in rats with surgically induced lung puncture. This is the first demonstration of a rational patch design framework that features both anisotropic and auxetic properties to cater to a wide range of organ dynamics. These studies pave the way for future clinical development of biomimetic patches. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1616301X
Volume :
32
Issue :
43
Database :
Academic Search Index
Journal :
Advanced Functional Materials
Publication Type :
Academic Journal
Accession number :
159842851
Full Text :
https://doi.org/10.1002/adfm.202207590