Journal
EXPERT OPINION ON BIOLOGICAL THERAPY
Volume 15, Issue 7, Pages 987-999Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1517/14712598.2015.1038234
Keywords
muscle injuries; platelet-rich plasma; sports; tissue regeneration
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Introduction: Every year recreational and professional sports cause thousands of lesions to muscle, ligament and tendon. Critical progress in biological interventions could meet a pressing health need to help athletes resume their activity levels. Areas covered: We perform a narrative review on platelet-rich plasma (PRP) therapies and muscle injuries. The field is eminently translational, thus besides clinical data we summarize experimental studies that bring meaningful biological insights on PRP effects. Some concepts regarding healing mechanisms are reviewed including innate immune response, myogenesis and fibrosis. It is commonly thought that PRPs are not uniform and cannot be assessed against each other, thus current PRP classifications are addressed. PRP effects also depend on the characteristics of the host tissue; therefore we focus on clinical muscle injury classifications. Controversial clinical findings are attributed to both the variability in PRP formulations and variability in the application protocols, so we discuss current clinical data in this basis. Expert opinion: Currently, there is little clinical evidence to support the use of PRP in skeletal muscle injuries. The future of PRP therapies relies not only in finding the best products, most appropriate indications and application protocols, but also in conceiving combination products. Moreover, as our understanding of healing mechanisms progresses, off-the-shelf allogenic PRP products could be part of the solution for sport injuries.
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