Mechanical memory based biofabrication of hierarchical elastic cardiac tissue.

Abstract

Mimicking the multilayered, anisotropic, elastic structure of cardiac tissues for controlled guidiance of 3D cellular orientation is essential in designing bionic scaffolds for cardiac tissue biofabrication. Here, a hierarchically organized, anisotropic, wavy and conductive polycaprolactone/Au scaffold was created in a facile fashion based on mechanical memory during fabrication. The bionic 3D scaffold shows good biocompatibility, excellent biomimetic mechanical properties that guide myoblast alignment, support the hyperelastic behavior observed in native cardiac muscle tissue, and promote myotube maturation, which holds potential for cardiac muscle engineering and the establishment of an<i>in vitro</i>culture platform for drug screening.