Biomimetic engineered muscle with capacity for vascular integration and functional maturation in vivo.

TitleBiomimetic engineered muscle with capacity for vascular integration and functional maturation in vivo.
Publication TypeJournal Article
Year of Publication2014
AuthorsJuhas, M, Engelmayr, GC, Fontanella, AN, Palmer, GM, and Bursac, N
JournalProceedings of the National Academy of Sciences of USA
Volume111
Issue15
Start Page5508
Pagination5508 - 5513
Date Published04/2014
Abstract

Tissue-engineered skeletal muscle can serve as a physiological model of natural muscle and a potential therapeutic vehicle for rapid repair of severe muscle loss and injury. Here, we describe a platform for engineering and testing highly functional biomimetic muscle tissues with a resident satellite cell niche and capacity for robust myogenesis and self-regeneration in vitro. Using a mouse dorsal window implantation model and transduction with fluorescent intracellular calcium indicator, GCaMP3, we nondestructively monitored, in real time, vascular integration and the functional state of engineered muscle in vivo. During a 2-wk period, implanted engineered muscle exhibited a steady ingrowth of blood-perfused microvasculature along with an increase in amplitude of calcium transients and force of contraction. We also demonstrated superior structural organization, vascularization, and contractile function of fully differentiated vs. undifferentiated engineered muscle implants. The described in vitro and in vivo models of biomimetic engineered muscle represent enabling technology for novel studies of skeletal muscle function and regeneration.

DOI10.1073/pnas.1402723111
Short TitleProceedings of the National Academy of Sciences of USA