Accession Number:

ADA620359

Title:

Asynchronous Inflammation and Myogenic Cell Migration Limit Muscle Tissue Regeneration Mediated by a Cellular Scaffolds

Descriptive Note:

Journal article

Corporate Author:

ARMY INST OF SURGICAL RESEARCH FORT SAM HOUSTON TX

Report Date:

2015-02-11

Pagination or Media Count:

6.0

Abstract:

Volumetric muscle loss VML following orthopaedic trauma results in chronic loss of strength and can contribute to disability. Tissue engineering and regenerative medicine approaches to regenerate the lost skeletal muscle and improve functional outcomes are currently under development. At the forefront of these efforts, decellularized extracellular matrices ECMs have reached clinical testing and provide the foundation for other approaches that include stemprogenitor cell delivery. ECMs have been demonstrated to possess many qualities to initiate regeneration, to include stem cell chemotaxis and pro-regenerative macrophage polarization. However, the majority of observations indicate that ECM-repair of VML does not promote appreciable muscle fiber regeneration. In a recent study, ECM-repair of VML was compared to classical muscle fiber regeneration Garg et al ., 2014, Cell Tissue Research mediated by autologous minced grafts. The most salient findings of this study were 1 Satellite cells did not migrate into the scaffold beyond approximately 0.5 mm from the remaining host tissue, although other migratory stem cells Sca-1 were observed throughout the scaffold2 Macrophage migration to the scaffold was over two - times that observed with muscle grafts, but they appeared to be less active, as gene expression of pro-and anti-inflammatory cytokines TNF -alpha , IL-12, IL-4, IL-10, VEGF, and TGF-1 was significantly reduced in scaffold-repaired muscles And, 3 scaffolds did not promote appreciable muscle fiber regeneration. Collectively, these data suggest that the events following ECM transplantation in VML are either incongruous or asynchronous with classical fiber regeneration.

Subject Categories:

  • Anatomy and Physiology
  • Medicine and Medical Research
  • Biomedical Instrumentation and Bioengineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE