Laminin mimetic peptide nanofibers regenerate acute muscle defect

被引:22
作者
Cimenci, Cagla Eren [1 ,2 ]
Uzunalli, Gozde [1 ,2 ]
Uysal, Ozge [1 ,3 ]
Yergoz, Fatih [1 ,2 ]
Umay, Ebru Karaca [4 ]
Guler, Mustafa O. [5 ]
Tekinay, Ayse B. [1 ,2 ]
机构
[1] Bilkent Univ, Natl Nanotechnol Res Ctr UNAM, Inst Mat Sci & Nanotechnol, TR-06800 Ankara, Turkey
[2] Bilkent Univ, Mat Sci & Nanotechnol Grad Program, TR-06800 Ankara, Turkey
[3] Bilkent Univ, Neurosci Grad Program, TR-06800 Ankara, Turkey
[4] Diskapi Yildirim Beyazit Training & Res Hosp, Phys Med & Rehabil Clin, TR-06800 Ankara, Turkey
[5] Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA
关键词
Peptide nanofiber; Acute muscle injury; Regeneration; Laminin; Hydrogel; Functional self-assembly; CROSS-SECTIONAL AREA; STEM-CELLS; AMPHIPHILE NANOFIBERS; DIFFERENTIATION; FIBRONECTIN; HYDROGELS; PAX7;
D O I
10.1016/j.actbio.2017.07.010
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Skeletal muscle cells are terminally differentiated and require the activation of muscle progenitor (satellite) cells for their regeneration. There is a clinical need for faster and more efficient treatment methods for acute muscle injuries, and the stimulation of satellite cell proliferation is promising in this context. In this study, we designed and synthesized a laminin-mimetic bioactive peptide (LM/E-PA) system that is capable of accelerating satellite cell activation by emulating the structure and function of laminin, a major protein of the basal membrane of the skeletal muscle. The LM/E-PA nanofibers enhance myogenic differentiation in vitro and the clinical relevance of the laminin-mimetic bioactive scaffold system was demonstrated further by assessing its effect on the regeneration of acute muscle injury in a rat model. Laminin mimetic peptide nanofibers significantly promoted satellite cell activation in skeletal muscle and accelerated myofibrillar regeneration following acute muscle injury. In addition, the LM/E-PA scaffold treatment significantly reduced the time required for the structural and functional repair of skeletal muscle. This study represents one of the first examples of molecular- and tissue-level regeneration of skeletal muscle facilitated by bioactive peptide nanofibers following acute muscle injury. Significance Statement Sports, heavy lifting and other strength-intensive tasks are ubiquitous in modern life and likely to cause acute skeletal muscle injury. Speeding up regeneration of skeletal muscle injuries would not only shorten the duration of recovery for the patient, but also support the general health and functionality of the repaired muscle tissue. In this work, we designed and synthesized a laminin-mimetic nanosystem to enhance muscle regeneration. We tested its activity in a rat tibialis anterior muscle by injecting the bioactive nanosystem. The evaluation of the regeneration and differentiation capacity of skeletal muscle suggested that the laminin-mimetic nanosystem enhances skeletal muscle regeneration and provides a suitable platform that is highly promising for the regeneration of acute muscle injuries. This work demonstrates for the first time that laminin-mimetic self-assembled peptide nanosystems facilitate myogenic differentiation in vivo without the need for additional treatment. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:190 / 200
页数:11
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