Enhancement of fracture healing after citrulline supplementation in mice.

Enhancement of fracture healing after citrulline supplementation in mice. Eur Cell Mater. 2020 Mar 20;39:183-192 Authors: Meesters DM, Hannemann PF, van Eijk HM, Schriebl VT, Brink PR, Poeze M, Wijnands KA Abstract Around 10 % of long bone fractures show inadequate bone healing resulting in non-union development. A deregulated arginine-citrulline-nitric oxide metabolism caused by a poor nutritional status of the patients is a risk factor for non-unions. Additionally, previous research in mice with a disrupted arginine to citrulline conversion showed delayed healing. The study hypothesis was that stimulating said metabolism could positively influence the healing process through promotion of collagen synthesis and angiogenesis. Adult wild-type mice underwent a femur osteotomy and plate-screw osteosynthesis. Mice were randomly divided into three groups and received daily oral supplementation of arginine, citrulline or 0.9 % saline (control). Body weight and food intake were measured daily. After 14 d, the mice were euthanised and femora collected. Callus formation was assessed by micro-computed tomography and concentrations of amino acids and enzymes in the femora were measured. Only citrulline-treated mice showed significantly increased bridging of the fracture gap when compared to control mice. Femur citrulline and ornithine concentrations were increased in citrulline-treated animals. qPCR showed significantly decreased expression of ...
Source: European Cells and Materials - Category: Cytology Tags: Eur Cell Mater Source Type: research