title: The effect of source animal age upon the in vivo remodeling characteristics of an extracellular matrix scaffold.
abstract: Biologic scaffolds composed of mammalian extracellular matrix (ECM) are routinely used for the repair and reconstruction of injured or missing tissues in a variety of pre-clinical and clinical applications. However, the structural and functional outcomes have varied considerably. An important variable of xenogeneic biologic scaffolds is the age of the animal from which the ECM is derived. The present study compared the in vivo host response and remodeling outcomes of biologic scaffolds composed of small intestinal submucosa (SIS)-ECM harvested from pigs that differed only in age. Results showed that there are distinct differences in the remodeling characteristics as a consequence of source animal age. Scaffolds derived from younger animals were associated with a more constructive, site appropriate, tissue remodeling response than scaffolds derived from older animals. Furthermore, the constructive remodeling response was associated with a dominant M2 macrophage response.
authors.affiliation: McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.
authors.forename: Brian M
authors.initials: BM
authors.lastname: Sicari
authors.forename: Scott A
authors.initials: SA
authors.lastname: Johnson
authors.forename: Bernard F
authors.initials: BF
authors.lastname: Siu
authors.forename: Peter M
authors.initials: PM
authors.lastname: Crapo
authors.forename: Kerry A
authors.initials: KA
authors.lastname: Daly
authors.forename: Hongbin
authors.initials: H
authors.lastname: Jiang
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Medberry
authors.forename: Stephen
authors.initials: S
authors.lastname: Tottey
authors.forename: Neill J
authors.initials: NJ
authors.lastname: Turner
authors.forename: Stephen F
authors.initials: SF
authors.lastname: Badylak
mesh_terms: D000375:Aging / Q000502:physiology*; D000818:Animals; D055119:Elastic Modulus / Q000502:physiology; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005109:Extracellular Matrix / Q000737:chemistry* / Q000502:physiology*; D006244:Hardness / Q000502:physiology; D007413:Intestinal Mucosa / Q000737:chemistry* / Q000502:physiology*; D008422:Materials Testing; D013552:Swine / Q000502:physiology*; D054457:Tissue Scaffolds; D014783:Viscosity