title: The effects of processing methods upon mechanical and biologic properties of porcine dermal extracellular matrix scaffolds.
abstract: Biologic materials from various species and tissues are commonly used as surgical meshes or scaffolds for tissue reconstruction. Extracellular matrix (ECM) represents the secreted product of the cells comprising each tissue and organ, and therefore provides a unique biologic material for selected regenerative medicine applications. Minimal disruption of ECM ultrastructure and content during tissue processing is typically desirable. The objective of this study was to systematically evaluate effects of commonly used tissue processing steps upon porcine dermal ECM scaffold composition, mechanical properties, and cytocompatibility. Processing steps evaluated included liming and hot water sanitation, trypsin/SDS/TritonX-100 decellularization, and trypsin/TritonX-100 decellularization. Liming decreased the growth factor and glycosaminoglycan content, the mechanical strength, and the ability of the ECM to support in vitro cell growth (p ≤ 0.05 for all). Hot water sanitation treatment decreased only the growth factor content of the ECM (p ≤ 0.05). Trypsin/SDS/TritonX-100 decellularization decreased the growth factor content and the ability of the ECM to support in vitro cell growth (p ≤ 0.05 for both). Trypsin/Triton X-100 decellularization also decreased the growth factor content of the ECM but increased the ability of the ECM to support in vitro cell growth (p ≤ 0.05 for both). We conclude that processing steps evaluated in the present study affect content, mechanical strength, and/or cytocompatibility of the resultant porcine dermal ECM, and therefore care must be taken in choosing appropriate processing steps to maintain the beneficial effects of ECM in biologic scaffolds.
authors: McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA.
authors: Janet E
authors: JE
authors: Reing
authors: Bryan N
authors: BN
authors: Brown
authors: Kerry A
authors: KA
authors: Daly
authors: John M
authors: JM
authors: Freund
authors: Thomas W
authors: TW
authors: Gilbert
authors: Susan X
authors: SX
authors: Hsiong
authors: Alexander
authors: A
authors: Huber
authors: Karen E
authors: KE
authors: Kullas
authors: Stephen
authors: S
authors: Tottey
authors: Matthew T
authors: MT
authors: Wolf
authors: Stephen F
authors: SF
authors: Badylak
mesh_terms: D000818:Animals; D049109:Cell Proliferation; D020405:Dermis / Q000166:cytology / Q000378:metabolism*; D005109:Extracellular Matrix / Q000378:metabolism*; D016222:Fibroblast Growth Factor 2 / Q000378:metabolism; D006025:Glycosaminoglycans / Q000378:metabolism; D008422:Materials Testing; D055595:Mechanical Phenomena; D034421:Sus scrofa; D023822:Tissue Engineering / Q000379:methods*; D054457:Tissue Scaffolds / Q000737:chemistry*; D053773:Transforming Growth Factor beta1 / Q000378:metabolism; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism
chemical_list: D006025:Glycosaminoglycans; D053773:Transforming Growth Factor beta1; D042461:Vascular Endothelial Growth Factor A; D016222:Fibroblast Growth Factor 2