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Biomechanical Testing of Murine Tendons
Published on: October 15, 2019
Matrix metalloproteinase inhibitors prevent a decrease in the mechanical properties of stress-deprived tendons: an in
Steven P Arnoczky1, Michael Lavagnino, Monika Egerbacher
1Laboratory for Comparative Orthopaedic Research, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA. arnoczky@cvm.msu.edu
The American Journal of Sports Medicine
|February 13, 2007
Summary
Matrix metalloproteinase inhibitors protected tendon material properties and pericellular matrix integrity during stress deprivation. These findings suggest MMP inhibitors may aid in treating tendinopathy by limiting matrix degradation.
Area of Science:
- Biomaterials Science
- Connective Tissue Biology
- Pharmacology
Background:
- Increased matrix metalloproteinases (MMPs) contribute to tendinopathy pathogenesis.
- MMP inhibitors have shown benefits in conditions affecting connective tissues.
Purpose of the Study:
- To investigate if matrix metalloproteinase inhibitors prevent material property decline in stressed tendons.
- To assess the impact of MMP inhibitors on tendon stress deprivation.
Main Methods:
- Rat tail tendons underwent 7 days of in vitro stress deprivation.
- Treated tendons received doxycycline or ilomastat, broad-spectrum MMP inhibitors.
- Evaluated material properties, MMP-13 expression, protein synthesis, activity, and matrix morphology.
Main Results:
- MMP inhibitors significantly reduced MMP activity and preserved tendon material properties.
- Ilomastat and doxycycline maintained pericellular matrix integrity.
- MMP-13 gene and protein expression were not significantly altered.
Conclusions:
- MMP inhibitors prevent MMP-13 activation, matrix degeneration, and loss of material properties.
- MMP inhibitors may support tendinopathy treatment by mitigating MMP-mediated extracellular matrix degradation.
