損傷した筋肉/神経の再生とロボット支援リハビリを支援する新しい「注射可能な組織人工器官」を開発(New “injectable tissue prosthesis coupled with closed-loop bioelectronic system” to aid in damaged muscle/nerve regeneration and robot-assisted rehabilitation)

2023-11-02 韓国基礎科学研究院(IBS)

<関連情報>

• https://www.ibs.re.kr/cop/bbs/BBSMSTR_000000000738/selectBoardArticle.do
• https://www.nature.com/articles/s41586-023-06628-x

瞬時のクローズド・ループ・リハビリを可能にする注射可能な人工組織 Injectable tissue prosthesis for instantaneous closed-loop rehabilitation

Subin Jin,Heewon Choi,Duhwan Seong,Chang-Lim You,Jong-Sun Kang,Seunghyok Rho,Won Bo Lee,Donghee Son & Mikyung Shin
Nature  Published:01 November 2023
DOI:https://doi.org/10.1038/s41586-023-06628-x

Abstract

To construct tissue-like prosthetic materials, soft electroactive hydrogels are the best candidate owing to their physiological mechanical modulus, low electrical resistance and bidirectional stimulating and recording capability of electrophysiological signals from biological tissues^1,2. Nevertheless, until now, bioelectronic devices for such prostheses have been patch type, which cannot be applied onto rough, narrow or deep tissue surfaces^3,4,5. Here we present an injectable tissue prosthesis with instantaneous bidirectional electrical conduction in the neuromuscular system. The soft and injectable prosthesis is composed of a biocompatible hydrogel with unique phenylborate-mediated multiple crosslinking, such as irreversible yet freely rearrangeable biphenyl bonds and reversible coordinate bonds with conductive gold nanoparticles formed in situ by cross-coupling. Closed-loop robot-assisted rehabilitation by injecting this prosthetic material is successfully demonstrated in the early stage of severe muscle injury in rats, and accelerated tissue repair is achieved in the later stage.