Abstract
Volumetric muscle loss (VML) resulting from traumatic accidents, tumor ablation, or degenerative disease is associated with limited treatment options and high morbidity. The lack of a reliable and reproducible animal model of VML has hindered the development of effective therapeutic strategies. The present study describes a critical-sized excisional defect within the mouse quadriceps muscle that results in an irrecoverable volumetric defect. This model of VML was used to evaluate the efficacy of a surgically placed inductive biologic scaffold material composed of porcine small intestinal submucosa-extracellular matrix (SIS-ECM). The targeted placement of an SIS-ECM scaffold within the defect was associated with constructive tissue remodeling including the formation of site-appropriate skeletal muscle tissue. The present study provides a reproducible animal model with which to study VML and shows the therapeutic potential of a bioscaffold-based regenerative medicine approach to VML.
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