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Related Experiment Video

Updated: Feb 5, 2026

Effects of Allogeneic Platelet-Rich Plasma PRP on the Healing Process of Sectioned Achilles Tendons of Rats: A Methodological Description
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Promoting effective tendon healing and remodeling.

Nelly Andarawis-Puri1,2, Evan L Flatow3

  • 1Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York.

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
|September 4, 2018
PubMed
Summary

Daily activities cause tendon fatigue injuries, leading to tendinopathies. This study explores extracellular matrix (ECM) roles in tendon degeneration and scarless healing, using exercise models and MRL/MpJ mice.

Keywords:
scarless healingtendon degenerationtendon exercisetendon fatiguetendon rupture

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Area of Science:

  • Orthopaedic Research
  • Biomedical Engineering
  • Extracellular Matrix Biology

Background:

  • Tendinopathies are common musculoskeletal issues stemming from accumulated sub-rupture fatigue injuries.
  • The extracellular matrix (ECM) plays a critical role in tendon health and repair processes.

Purpose of the Study:

  • To investigate the ECM's role in tendinopathy pathogenesis and impaired tendon healing.
  • To explore therapeutic strategies for promoting scarless tendon healing and remodeling of fatigue injuries.

Main Methods:

  • Developed animal models of exercise-induced tendon degeneration and repair.
  • Utilized the MRL/MpJ mouse model to study scarless healing mechanisms.
  • Analyzed the impact of fatigue loading severity on damage accumulation and repair efficacy.

Main Results:

  • Sub-rupture fatigue damage can accumulate rapidly, even from a single loading event.
  • Repair efficacy decreases as the severity of induced tendon damage increases.
  • The MRL/MpJ mouse model shows potential for promoting scarless tendon healing through its provisional ECM.

Conclusions:

  • Understanding ECM's role is crucial for developing effective tendinopathy treatments.
  • Exercise can be used to model and study tendon degeneration and repair.
  • The MRL/MpJ mouse's ECM warrants further investigation for therapeutic applications in tendon repair.