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Related Experiment Video

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Production of Nanofibrillar Patterned Collagen for Tissue Engineering
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Cell-Derived Extracellular Matrix Fiber Scaffolds Improve Recovery from Volumetric Muscle Loss.

Cassandra Reed1, Tai Huynh1, Jacob Schluns1

  • 1Department of Biomedical Engineering, College of Engineering, University of Arkansas, Fayetteville, Arkansas, USA.

Tissue Engineering. Part A
|September 2, 2023
PubMed
Summary
This summary is machine-generated.

New ECM fiber scaffolds significantly improved muscle recovery after volumetric muscle loss (VML) injuries in rats. These cell-derived scaffolds show promise for VML repair, matching outcomes of tissue-sourced scaffolds.

Keywords:
extracellular matrixscaffoldskeletal musclevolumetric muscle loss

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Volumetric muscle loss (VML) injuries lack effective surgical treatments, necessitating novel implantable scaffolding solutions.
  • Extracellular matrix (ECM) derived from cultured muscle fibroblasts offers a potential source for regenerative scaffolds.

Purpose of the Study:

  • To evaluate the efficacy of allogenic ECM fiber scaffolds combined with minced muscle (MM) paste for repairing VML injuries in a rat model.
  • To compare the recovery outcomes with unrepaired controls and decellularized skeletal muscle (DSM) scaffolds.

Main Methods:

  • Fabrication of allogenic scaffolds from ECM fibers of muscle fibroblast cultures.
  • Induction of VML injury in the rat tibialis anterior muscle.
  • Assessment of muscle mass and peak contractile torque at 8-week follow-up.

Main Results:

  • ECM fiber + MM repair significantly improved peak contractile torque (79%) and muscle mass restoration (93%) compared to unrepaired VML controls.
  • Recovery outcomes for ECM fiber scaffolds were comparable to those achieved with DSM + MM repair.
  • No significant differences in mass and contractile strength recovery between ECM fiber and DSM scaffolds.

Conclusions:

  • Cell-derived ECM fiber scaffolds represent a promising strategy for VML injury repair, yielding outcomes comparable to tissue-sourced ECM scaffolds.
  • The findings support further investigation of ECM fiber scaffolds for VML treatment.
  • ECM fibers can be adapted for textile industry fabrication methods, enabling diverse implant designs for broader clinical applications.