Induction of functional tissue-engineered skeletal muscle constructs by defined electrical stimulation

Akira Ito, Yasunori Yamamoto, Masanori Sato, Kazushi Ikeda, Masahiro Yamamoto, Hideaki Fujita, Eiji Nagamori, Yoshinori Kawabe, Masamichi Kamihira

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53 Citations (Scopus)

Abstract

Electrical impulses are necessary for proper in vivo skeletal muscle development. To fabricate functional skeletal muscle tissues in vitro, recapitulation of the in vivo niche, including physical stimuli, is crucial. Here, we report a technique to engineer skeletal muscle tissues in vitro by electrical pulse stimulation (EPS). Electrically excitable tissue-engineered skeletal muscle constructs were stimulated with continuous electrical pulses of 0.3â €...V/mm amplitude, 4â €...ms width, and 1â €...Hz frequency, resulting in a 4.5-fold increase in force at day 14. In myogenic differentiation culture, the percentage of peak twitch force (%Pt) was determined as the load on the tissue constructs during the artificial exercise induced by continuous EPS. We optimized the stimulation protocol, wherein the tissues were first subjected to 24.5%Pt, which was increased to 50-60%Pt as the tissues developed. This technique may be a useful approach to fabricate tissue-engineered functional skeletal muscle constructs.

Original languageEnglish
Article number4781
JournalScientific reports
Volume4
DOIs
Publication statusPublished - Apr 24 2014

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