Silver nanowire loaded poly(epsilon-caprolactone) nanocomposite fibers as electroactive scaffolds for skeletal muscle regeneration


Basturkmen B., Ergene E., DOĞANAY D., HURİ P., ÜNALAN H. E. , AKSOY E. A.

BIOMATERIALS ADVANCES, vol.134, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 134
  • Publication Date: 2022
  • Doi Number: 10.1016/j.msec.2021.112567
  • Journal Name: BIOMATERIALS ADVANCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Keywords: Silver nanowire, Rotational wet spinning, Nanocomposite fiber, Electrical stimulation, Skeletal muscle tissue engineering, Poly(?-caprolactone), ELECTRICAL-STIMULATION, CELL-PROLIFERATION, TISSUE, COMPOSITE, ALIGNMENT, FILMS, MYOBLASTS, SUBSTRATE
  • Hacettepe University Affiliated: Yes

Abstract

Volumetric muscle loss (VML) due to trauma and tumor removal operations affects millions of people every year. Al-though skeletal muscle has a natural repair mechanism, it cannot provide self-healing above a critical level of VML. In this study, nanocomposite aligned fiber scaffolds as support materials were developed for volumetric skeletal muscle regeneration. For this purpose, silver nanowire (Ag NW) loaded poly(epsilon-caprolactone) (PCL) nanocomposite fiber scaf-folds (PCL-Ag NW) were prepared to mimic the aligned electroactive structure of skeletal muscle and provide topo-graphic and conductive environment to modulate cellular behavior and orientation. A computer-aided rotational wet spinning (RWS) system was designed to produce high-yield fiber scaffolds. Nanocomposite fiber bundles with lengths of 50 cm were fabricated via this computer-aided RWS system. The morphological, chemical, thermal proper -ties and biodegradation profiles of PCL and PCL-Ag NW nanocomposite fibers were characterized in detail. The prolif-eration behavior and morphology of C2C12 mouse myoblasts were investigated on PCL and PCL-Ag NW nanocomposite fibrous scaffolds with and without electrical stimulation. Significantly enhanced cell proliferation was observed on PCL-Ag NW nanocomposite fibers compared to neat PCL fibers with electrical stimulations of 1.5 V, 3 V and without electrical stimulation.