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Updated: Jul 14, 2026
08:32
Engineering Tendon Assembloids to Probe Cellular Crosstalk in Disease and Repair
Published on: March 22, 2024
Oxygen free radicals and tendon healing
1Orthopaedic Research Institute, St George Hospital Campus, University of New South Wales, Sydney, Australia. admin@ori.org.au
Journal of Shoulder and Elbow Surgery
|May 19, 2007
Summary
Nitric oxide (NO) plays a vital role in tendon healing by all three nitric oxide synthase (NOS) isoforms. NO donation significantly improves tendon repair and function in clinical tendinopathy.
Area of Science:
- Biomedical Engineering
- Musculoskeletal Research
- Wound Healing
Background:
- Nitric oxide (NO) is a signaling molecule produced by nitric oxide synthases (NOS).
- Tendon injuries often result in impaired healing and loss of function.
- The role of NO in tendon healing has been investigated over 15 years.
Purpose of the Study:
- To investigate the role of nitric oxide (NO) and its producing enzymes (NOS) in tendon healing.
- To determine the therapeutic potential of NO donation in tendinopathy.
Main Methods:
- Studied NOS expression in healing rat and human tendons.
- Administered NO donors (nitric oxide-flurbiprofen, NO patch) in preclinical and clinical settings.
- Assessed tendon healing, mechanical properties, and collagen synthesis in vitro and in vivo.
Main Results:
- All three NOS isoforms were induced during tendon healing.
- NOS inhibition impaired tendon healing and mechanical properties.
- NO donation enhanced collagen synthesis in human tendon cells.
- Clinical trials showed significant improvement in symptoms and function for tendinopathy patients using NO patches.
Conclusions:
- Nitric oxide is crucial for effective tendon healing and restoration of function.
- NO donation represents a promising therapeutic strategy for managing tendinopathies.
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