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  • Title: Addition of nitric oxide via nitroflurbiprofen enhances the material properties of early healing of young rat Achilles tendons.
    Author: Yuan J, Murrell GA, Wei AQ, Appleyard RC, Del Soldato P, Wang MX.
    Journal: Inflamm Res; 2003 Jun; 52(6):230-7. PubMed ID: 12835894.
    Abstract:
    OBJECTIVE AND DESIGN: To determine if the addition of nitric oxide (NO) via nitroflurbiprofen (NO-flurbiprofen) would enhance rat Achilles tendon healing. MATERIALS AND METHODS: Sixty-five male Sprague-Dawley rats were randomly divided into NO-flurbiprofen, flurbiprofen and vehicle groups, given drugs or vehicle subcutaneously, and their right Achilles tendon divided. Histological assessment was carried out at day 5, 10, and 15 post-operation. Healing tendon biomechanical properties and hydroxyproline content were measured at day 10. RESULTS: The healing Achilles tendon from the NO-flurbiprofen and flurbiprofen groups showed a better organization of extracellular collagenous matrix than that from the vehicle group. Flurbiprofen and NO-flurbiprofen decreased healing tendon cross-sectional area by 30% and 20%. This reduction was accompanied by a decreased failure load in the flurbiprofen group, but not the NO-flurbiprofen group. NO-flubiprofen prevented the reduction of body weight gain observed in the flubiprofen group. CONCLUSION: Both flurbiprofen and NO-flurbiprofen promoted better collagen reorganization during tendon healing. NO-flurbiprofen further improved tendon healing by increasing tendon stress and reducing the side effects (body weight loss) of flurbiprofen. The enhanced tendon healing by NO-flurbiprofen is likely due to the release of NO from the compound.
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