HISTOLOGY AND HISTOPATHOLOGY

Cellular and Molecular Biology

 

Review

Muscle injuries and repair: The role of prostaglandins and inflammation

V. Prisk1 and J. Huard1,2

1Growth and Development Laboratory, Department of Orthopaedic Surgery Children's Hospital of Pittsburgh and University of Pittsburgh, Pittsburgh, USA and 2Department of Molecular Genetics and Biochemistry, University of Pittsburgh, Pittsburgh, PA, USA

Offprint requests to: Johnny Huard, Ph.D., Director, Growth and Development Laboratory, 4151 Rangos Research Center, Children's Hospital of Pittsburgh, 3705 Fifth Avenue Pittsburgh, PA 15213-2583. Fax: 412-692-7095. e-mail: jhuard+@pitt.edu

 

Summary. Skeletal muscle injuries are a common problem in trauma and orthopaedic surgery. Muscle injuries undergo the healing phases of degeneration, inflammation, regeneration, and fibrosis. Current and experimental therapies to improve muscle regeneration and limit muscle fibrosis include conservative and surgical principles with the adjuvant use of non-steroidal anti-inflammatory drugs (NSAIDs) and growth factor manipulation. NSAIDs appear to have a paradoxical effect on the healing of muscle injuries with early signs of improvement and subsequent late impairment in functional capacity and histology. In vitro and in vivo studies have explored the role of the cyclooxygenases and prostaglandins in the biological processes of healing muscle, including precursor cell activation, myoblast proliferation, myoblast fusion, and muscle protein synthesis. Through use of more specific cyclooxygenase inhibitors, we may be able to better understand the role of inflammation in muscle healing. Histol. Histopathol. 18, 1243-1256 (2003)

Key words: Muscle injury, Prostaglandins, NSAIDs, Cyclooxygenase

DOI: 10.14670/HH-18.1243