Instrumented cardiac microphysiological devices via multimaterial three-dimensional printing
Johan Ulrik Lind,Johan Ulrik Lind,Travis Alexander Busbee,Travis Alexander Busbee,Alexander D. Valentine,Alexander D. Valentine,Francesco S. Pasqualini,Francesco S. Pasqualini,Hongyan Yuan,Hongyan Yuan,Hongyan Yuan,Moran Yadid,Moran Yadid,Sung-Jin Park,Sung-Jin Park,Arda Kotikian,Arda Kotikian,Alexander P. Nesmith,Alexander P. Nesmith,Patrick H. Campbell,Patrick H. Campbell,Joost J. Vlassak,Jennifer A. Lewis,Jennifer A. Lewis,Kevin Kit Parker,Kevin Kit Parker +25 more
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TLDR
Six functional inks are designed, based on piezo-resistive, high conductance, and biocompatible soft materials that enable integration of soft strain gauge sensors within micro-architectures that guide the self-assembly of physio-mimetic laminar cardiac tissues via multi-material 3D printing.Abstract:
Biomedical research has relied on animal studies and conventional cell cultures for decades. Recently, microphysiological systems (MPS), also known as organs-on-chips, that recapitulate the structure and function of native tissues in vitro, have emerged as a promising alternative. However, current MPS typically lack integrated sensors and their fabrication requires multi-step lithographic processes. Here, we introduce a facile route for fabricating a new class of instrumented cardiac microphysiological devices via multimaterial three-dimensional (3D) printing. Specifically, we designed six functional inks, based on piezo-resistive, high-conductance, and biocompatible soft materials that enable integration of soft strain gauge sensors within micro-architectures that guide the self-assembly of physio-mimetic laminar cardiac tissues. We validated that these embedded sensors provide non-invasive, electronic readouts of tissue contractile stresses inside cell incubator environments. We further applied these devices to study drug responses, as well as the contractile development of human stem cell-derived laminar cardiac tissues over four weeks.read more
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Toward Hierarchical Assembly of Aligned Cell Sheets into a Conical Cardiac Ventricle Using Microfabricated Elastomers
Mohammad Hossein Mohammadi,Sargol Okhovatian,Houman Savoji,Scott B. Campbell,Benjamin F.L. Lai,Jun Wu,Simon Pascual-Gil,Dawn Bannerman,Naimeh Rafatian,Ren Ke Li,Milica Radisic +10 more
TL;DR: An approach relying on microfabricated elastomers that enables hierarchical assembly of 2D aligned cell sheets into a functional conical cardiac ventricle is described, which provided functional readouts such as calcium transients and ejection fraction.
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