The effect of source animal age upon extracellular matrix scaffold properties.
Biologic scaffold materials composed of mammalian extracellular matrix (ECM) are commonly used for the repair and reconstruction of injured tissues. An important, but unexplored variable of biologic scaffolds is the age of the animal from which the ECM is prepared. The objective of the present study was to compare the structural, mechanical, and compositional properties of small intestinal submucosa (SIS)-ECM harvested from pigs that differed only in age. Degradation product bioactivity of these ECM materials was also examined. Results showed that there are distinct differences in each of these variables among the various age source ECM scaffolds. The strength and growth factors content of ECM from 3-week-old animals is less than that of ECM harvested from 12, 26 or >52-week-old animals. The elastic modulus of SIS-ECM for 3 week and >52-week-old source was less than that of the 12 and 26 week source. Degradation products from all age source ECMs were chemotactic for perivascular stem cells, with the 12 week source the most potent, while the oldest source caused the greatest increase in proliferation. In summary, distinct differences exist in the mechanical, structural, and biologic properties of SIS-ECM harvested from different aged animals.
Tottey
Stephen
S
McGowan Institute for Regenerative Medicine, Department of Bioengineering, University of Pittsburgh, Bridgeside Point Building II, 450 Technology Dr. Suite 300, Pittsburgh, PA 15219, USA.
Johnson
Scott A
SA
Crapo
Peter M
PM
Reing
Janet E
JE
Zhang
Li
L
Jiang
Hongbin
H
Medberry
Christopher J
CJ
Reines
Brandon
B
Badylak
Stephen F
SF
D000375:Aging / Q000187:drug effects / Q000502:physiology*; D000818:Animals; D001696:Biomechanical Phenomena / Q000187:drug effects; D001808:Blood Vessels / Q000166:cytology; D049109:Cell Proliferation / Q000187:drug effects; D002633:Chemotaxis / Q000187:drug effects; D017364:Collagenases / Q000378:metabolism; D005109:Extracellular Matrix / Q000187:drug effects / Q000378:metabolism*; D006025:Glycosaminoglycans / Q000378:metabolism; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism; D007413:Intestinal Mucosa / Q000187:drug effects; D008934:Mitogens / Q000494:pharmacology; D013234:Stem Cells / Q000166:cytology / Q000187:drug effects; D034421:Sus scrofa / Q000502:physiology*; D054457:Tissue Scaffolds / Q000737:chemistry*
D006025:Glycosaminoglycans; D036341:Intercellular Signaling Peptides and Proteins; D008934:Mitogens; D017364:Collagenases