Platelet-rich plasma in orthopedic therapy: a comparative systematic review of clinical and experimental data in equine and human musculoskeletal lesions.
Abstract: This systematic review aimed to present and critically appraise the available information on the efficacy of platelet rich plasma (PRP) in equine and human orthopedic therapeutics and to verify the influence of study design and methodology on the assumption of PRP's efficacy. We searched Medline, PubMed, Embase, Bireme and Google Scholar without restrictions until July 2013. Randomized trials, human cohort clinical studies or case series with a control group on the use of PRP in tendons, ligaments or articular lesions were included. Equine clinical studies on the same topics were included independently of their design. Experimental studies relevant to the clarification of PRP's effects and mechanisms of action in tissues of interest, conducted in any animal species, were selected. Results: This review included 123 studies. PRP's beneficial effects were observed in 46.7% of the clinical studies, while the absence of positive effects was observed in 43.3%. Among experimental studies, 73% yielded positive results, and 7.9% yielded negative results. The most frequent flaws in the clinical trials' designs were the lack of a true placebo group, poor product characterization, insufficient blinding, small sampling, short follow-up periods, and adoption of poor outcome measures. The methods employed for PRP preparation and administration and the selected outcome measures varied greatly. Poor study design was a common feature of equine clinical trials. From studies in which PRP had beneficial effects, 67.8% had an overall high risk of bias. From the studies in which PRP failed to exhibit beneficial effects, 67.8% had an overall low risk of bias. Conclusions: Most experimental studies revealed positive effects of PRP. Although the majority of equine clinical studies yielded positive results, the human clinical trials' results failed to corroborate these findings. In both species, beneficial results were more frequently observed in studies with a high risk of bias. The use of PRP in musculoskeletal lesions, although safe and promising, has still not shown strong evidence in clinical scenarios.
Publication Date: 2015-04-22 PubMed ID: 25896610PubMed Central: PMC4449579DOI: 10.1186/s12917-015-0403-zGoogle Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
- Systematic Review
Summary
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The research systematically reviews the effectiveness of using platelet-rich plasma (PRP) in treating musculoskeletal injuries in humans and horses, noting the potential bias in studies and the challenges in comparing the varying methodologies and outcomes.
Objective of the Study
- The study aims to evaluate and compare the efficacy of PRP therapy in the treatment of orthopedic injuries in humans and equines (horses) through a systematic review of existing clinical and experimental studies.
Methodology and Results
- For data collection, several academic databases were consulted, with the inclusion criteria specifying randomized trials, human cohort clinical studies, or case series with a control group involving PRP use in tendons, ligaments, or joint lesions. Equine studies on the same themes were included independent of their design.
- Experimental studies that clarified PRP’s effects and mechanisms of action in tissues of relevance were included, regardless of the animal species studied.
- A total of 123 studies were analyzed in the review. Of these, approximately 47% reported beneficial effects of PRP in clinical studies while 43% reported no positive effects. In experimental studies, a higher percentage (73%) reported positive results of PRP, while just under 8% reported negative results.
Limited Evidence and Study Design Flaws
- The review underlines that the main shortcomings in the design of clinical trials included lack of a true placebo group, poor characterization of the product, insufficient blinding, small sample sizes, short follow-up periods, and poor outcome measures. In addition, the methods and measures for PRP preparation, administration, and outcome assessments varied greatly among the studies.
- A lack of rigorous study design was commonly seen among equine clinical trials.
- The review observes that in studies where PRP demonstrated beneficial effects, the majority had a high risk of bias. Similarly, in studies where PRP was not beneficial, the majority had a low risk of bias.
Final Conclusions
- The authors conclude that while most experimental studies showed positive effects of PRP and equine clinical studies frequently yielded positive results, human clinical trials failed to corroborate these findings. Notably, studies that reported positive results were more often associated with a high risk of bias.
- The review suggests that while the use of PRP in treating musculoskeletal lesions is safe and shows promise, there is still limited strong evidence to fully support its effectiveness in clinical scenarios.
Cite This Article
APA
Brossi PM, Moreira JJ, Machado TS, Baccarin RY.
(2015).
Platelet-rich plasma in orthopedic therapy: a comparative systematic review of clinical and experimental data in equine and human musculoskeletal lesions.
BMC Vet Res, 11, 98.
https://doi.org/10.1186/s12917-015-0403-z Publication
Researcher Affiliations
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil. ptbrossi@uol.com.br.
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil. ju_veterinaria@yahoo.com.br.
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil. tsodrelima@gmail.com.
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil. baccarin@usp.br.
MeSH Terms
- Animals
- Horse Diseases / therapy
- Horses
- Humans
- Joint Diseases / therapy
- Joint Diseases / veterinary
- Ligaments / injuries
- Platelet-Rich Plasma
- Tendon Injuries / therapy
- Tendon Injuries / veterinary
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