TY - JOUR
T1 - Effect of adipose-derived stromal cells and BMP12 on intrasynovial tendon repair
T2 - A biomechanical, biochemical, and proteomics study
AU - Gelberman, Richard H.
AU - Shen, Hua
AU - Kormpakis, Ioannis
AU - Rothrauff, Benjamin
AU - Yang, Guang
AU - Tuan, Rocky S.
AU - Xia, Younan
AU - Sakiyama-Elbert, Shelly
AU - Silva, Matthew J.
AU - Thomopoulos, Stavros
N1 - Publisher Copyright:
© 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - The outcomes of flexor tendon repair are highly variable. As recent efforts to improve healing have demonstrated promise for growth factor- and cell-based therapies, the objective of the current study was to enhance repair via application of autologous adipose derived stromal cells (ASCs) and the tenogenic growth factor bone morphogenetic protein (BMP) 12. Controlled delivery of cells and growth factor was achieved in a clinically relevant canine model using a nanofiber/fibrin-based scaffold. Control groups consisted of repair-only (no scaffold) and acellular scaffold. Repairs were evaluated after 28 days of healing using biomechanical, biochemical, and proteomics analyses. Range of motion was reduced in the groups that received scaffolds compared to normal. There was no effect of ASC + BMP12 treatment for range of motion or tensile properties outcomes versus repair-only. Biochemical assays demonstrated increased DNA, glycosaminoglycans, and crosslink concentration in all repair groups compared to normal, but no effect of ASC + BMP12. Total collagen was significantly decreased in the acellular scaffold group compared to normal and significantly increased in the ASC + BMP12 group compared to the acellular scaffold group. Proteomics analysis comparing healing tendons to uninjured tendons revealed significant increases in proteins associated with inflammation, stress response, and matrix degradation. Treatment with ASC + BMP12 amplified these unfavorable changes. In summary, the treatment approach used in this study induced a negative inflammatory reaction at the repair site leading to poor healing. Future approaches should consider cell and growth factor delivery methods that do not incite negative local reactions.
AB - The outcomes of flexor tendon repair are highly variable. As recent efforts to improve healing have demonstrated promise for growth factor- and cell-based therapies, the objective of the current study was to enhance repair via application of autologous adipose derived stromal cells (ASCs) and the tenogenic growth factor bone morphogenetic protein (BMP) 12. Controlled delivery of cells and growth factor was achieved in a clinically relevant canine model using a nanofiber/fibrin-based scaffold. Control groups consisted of repair-only (no scaffold) and acellular scaffold. Repairs were evaluated after 28 days of healing using biomechanical, biochemical, and proteomics analyses. Range of motion was reduced in the groups that received scaffolds compared to normal. There was no effect of ASC + BMP12 treatment for range of motion or tensile properties outcomes versus repair-only. Biochemical assays demonstrated increased DNA, glycosaminoglycans, and crosslink concentration in all repair groups compared to normal, but no effect of ASC + BMP12. Total collagen was significantly decreased in the acellular scaffold group compared to normal and significantly increased in the ASC + BMP12 group compared to the acellular scaffold group. Proteomics analysis comparing healing tendons to uninjured tendons revealed significant increases in proteins associated with inflammation, stress response, and matrix degradation. Treatment with ASC + BMP12 amplified these unfavorable changes. In summary, the treatment approach used in this study induced a negative inflammatory reaction at the repair site leading to poor healing. Future approaches should consider cell and growth factor delivery methods that do not incite negative local reactions.
KW - growth factor
KW - proteomics
KW - stem cell
KW - tendon
UR - http://www.scopus.com/inward/record.url?scp=84949667348&partnerID=8YFLogxK
U2 - 10.1002/jor.23064
DO - 10.1002/jor.23064
M3 - Article
C2 - 26445383
AN - SCOPUS:84949667348
SN - 0736-0266
VL - 34
SP - 630
EP - 640
JO - Journal of Orthopaedic Research
JF - Journal of Orthopaedic Research
IS - 4
ER -