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Tognoloni A, Pellegrini M, Di Salvo A, Sforna M, Cagiola M, Seccaroni M, Nannarone S, Beccati F, Pressanto MC, Di Meo A, Chiaradia E. Cytotoxicity of local anaesthetics and protective effects of platelet rich plasma on equine tenocytes: An in vitro study. Vet J 2024; 306:106159. [PMID: 38849026 DOI: 10.1016/j.tvjl.2024.106159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 06/03/2024] [Accepted: 06/04/2024] [Indexed: 06/09/2024]
Abstract
Local anaesthetics (LAs) can have detrimental effects on rat, bovine, canine, and human tendon tissues and cells. Currently, there has been no available data on the impact of these drugs on equine tenocytes. Even if LA injection for managing painful tendon conditions in horses is limited, it is usually used via intra-articular, intrasynovial, perineural, and intrathecal as well as for lameness examinations. In this in vitro study, the cytotoxic effects of LAs, including lidocaine, mepivacaine, and bupivacaine on equine tenocytes, in the presence and absence of platelet rich plasma (PRP), were investigated. PRP accelerates tissue healing and can exert cytoprotective effects on different cell types exposed to different stressful conditions, including drugs. Results indicated that the exposure to LAs significantly reduced tenocytes viability in dose- and time-dependent manners while PRP was able to counteract their cytotoxic effects. Furthermore, microscopy and flow cytometry analyses revealed apoptosis and necrosis in equine tenocytes exposed to these drugs, that were both reduced when PRP was in the medium. These findings highlight the importance of considering the tenocyte toxicity associated with intrathecal and intraneural LA injections, as they might affect tenocytes or reduce the efficacy of associated therapies. Moreover, this study also highlights the protective effects of PRP, which could make LA injections safer.
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Affiliation(s)
- Alessia Tognoloni
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy
| | - Martina Pellegrini
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati" (IZSUM), Perugia, Italy
| | - Alessandra Di Salvo
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy
| | - Monica Sforna
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy
| | - Monica Cagiola
- Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati" (IZSUM), Perugia, Italy
| | - Matteo Seccaroni
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy
| | - Sara Nannarone
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy; Sport Horse Research Center, University of Perugia, Department of Veterinary Medicine, Perugia, Italy
| | - Francesca Beccati
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy; Sport Horse Research Center, University of Perugia, Department of Veterinary Medicine, Perugia, Italy
| | - Maria Chiara Pressanto
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy; Cotts Equine Hospital, Robeston Wathen, Narberth, Pembrokeshire, UK
| | - Antonio Di Meo
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy
| | - Elisabetta Chiaradia
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, Perugia 06126, Italy; Sport Horse Research Center, University of Perugia, Department of Veterinary Medicine, Perugia, Italy.
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Badawy S, Yang Y, Liu Y, Marawan MA, Ares I, Martinez MA, Martínez-Larrañaga MR, Wang X, Anadón A, Martínez M. Toxicity induced by ciprofloxacin and enrofloxacin: oxidative stress and metabolism. Crit Rev Toxicol 2022; 51:754-787. [PMID: 35274591 DOI: 10.1080/10408444.2021.2024496] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Ciprofloxacin (CIP) (human use) and enrofloxacin (ENR) (veterinary use) are synthetic anti-infectious medications that belong to the second generation of fluoroquinolones. They have a wide antimicrobial spectrum and strong bactericidal effects at very low concentrations via enzymatic inhibition of DNA gyrase and topoisomerase IV, which are required for DNA replication. They also have high bioavailability, rapid absorption with favorable pharmacokinetics and excellent tissue penetration, including cerebral spinal fluid. These features have made them the most applied antibiotics in both human and veterinary medicine. ENR is marketed exclusively for animal medicine and has been widely used as a therapeutic veterinary antibiotic, resulting in its residue in edible tissues and aquatic environments, as well as the development of resistance and toxicity. Estimation of the risks to humans due to antimicrobial resistance produced by CIP and ENR is important and of great interest. Moreover, in rare cases due to their overdose and/or prolonged administration, the development of CIP and ENR toxicity may occur. The toxicity of these fluoroquinolones antimicrobials is mainly related to reactive oxygen species (ROS) and oxidative stress (OS) generation, besides metabolism-related toxicity. Therefore, CIP is restricted in pregnant and lactating women, pediatrics and elderly similarly ENR do in the veterinary field. This review manuscript aims to identify the toxicity induced by ROS and OS as a common sequel of CIP and ENR. Furthermore, their metabolism and the role of metabolizing enzymes were reported.
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Affiliation(s)
- Sara Badawy
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, China.,Pathology Department of Animal Medicine, Faculty of Veterinary Medicine, Benha University, Benha, Egypt
| | - YaQin Yang
- MAO Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, China
| | - Yanan Liu
- MAO Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, China
| | - Marawan A Marawan
- The State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China.,Infectious Diseases, Animal Medicine Department, Faculty of Veterinary Medicine, Benha University, Benha, Egypt
| | - Irma Ares
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid (UCM), and Research Institute Hospital 12 de Octubre (i + 12), Madrid, Spain
| | - María-Aránzazu Martinez
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid (UCM), and Research Institute Hospital 12 de Octubre (i + 12), Madrid, Spain
| | - María-Rosa Martínez-Larrañaga
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid (UCM), and Research Institute Hospital 12 de Octubre (i + 12), Madrid, Spain
| | - Xu Wang
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, China.,MAO Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, China
| | - Arturo Anadón
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid (UCM), and Research Institute Hospital 12 de Octubre (i + 12), Madrid, Spain
| | - Marta Martínez
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid (UCM), and Research Institute Hospital 12 de Octubre (i + 12), Madrid, Spain
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Kamble P, Prabhu RM, Jogani A, Mohanty SS, Panchal S, Dakhode S. Is Ultrasound (US)-Guided Platelet-Rich Plasma Injection More Efficacious as a Treatment Modality for Lateral Elbow Tendinopathy Than US-Guided Steroid Injection? A Prospective Triple-Blinded Study with Midterm Follow-up. Clin Orthop Surg 2022. [DOI: 10.4055/cios22128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Prashant Kamble
- Department of Orthopaedics, Seth GS Medical College and KEM Hospital, Mumbai, India
| | - Rudra Mangesh Prabhu
- Department of Orthopaedics, Seth GS Medical College and KEM Hospital, Mumbai, India
| | - Abhinav Jogani
- Department of Orthopaedics, Seth GS Medical College and KEM Hospital, Mumbai, India
| | | | - Sameer Panchal
- Department of Orthopaedics, Seth GS Medical College and KEM Hospital, Mumbai, India
| | - Shubham Dakhode
- Department of Orthopaedics, Seth GS Medical College and KEM Hospital, Mumbai, India
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4
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Yea JH, Shin S, Yoon KS, Jo CH. Effects of corticosteroids and platelet-rich plasma on synoviocytes in IL-1ß-induced inflammatory condition. Connect Tissue Res 2021; 62:586-596. [PMID: 33401977 DOI: 10.1080/03008207.2020.1822346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
AIMS Corticosteroid injections are used to treat shoulder pain. Platelet-rich plasma (PRP) is known to have anti-inflammatory and anabolic effects, as well as cytoprotective effects against corticosteroids. Thus, this study was to investigate the effects of co-treatment of corticosteroid and PRP on anti-inflammatory and matrix homeostasis of synoviocytes in IL-1ß-induced inflammatory conditions. MATERIALS AND METHODS Synoviocytes were cultured with 1 ng/mL IL-1β, 1 μM dexamethasone, and 10% (vol/vol) Platelet-poor plasma (PPP), PRP200, PRP1000, and PRP4000 X 103/μL. Gene expressions of pro-inflammatory and anti-inflammatory cytokines, degradative enzymes, and their inhibitors were evaluated and protein synthesis of degradative enzymes and their inhibitors were also examined. RESULTS Corticosteroid modulated anti-inflammatory and pro-inflammatory cytokines, and subsequent PRP treatment did not interfere with the effect of a corticosteroid and modulated the gene expressions of cytokines such as TNF-α and IL-4, which were not regulated by the corticosteroid alone. Gene expressions and protein expressions of degradative enzymes and their inhibitors were suppressed by corticosteroid. Additional PRPs did not alter the gene expression and protein regulated by the corticosteroid and inhibited the gene expression of ADAMTS-5 and protein synthesis of MMP-9 and ADAMTS-5, which were not modulated by the corticosteroid alone. CONCLUSION Corticosteroid regulated the inflammation and synovial homeostasis. When PRP and the corticosteroid were used together, it exhibited synergistic effects on synoviocytes by regulating the parts that were not controlled by corticosteroid alone while not interfering with the effects of the corticosteroid in an inflammatory condition.
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Affiliation(s)
- Ji-Hye Yea
- Department of Translational Medicine, Seoul National University College of Medicine, Seoul, Korea.,Department of Orthopedic Surgery, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Sue Shin
- Department of Laboratory Medicine, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Kang Sup Yoon
- Department of Orthopedic Surgery, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Chris Hyunchul Jo
- Department of Translational Medicine, Seoul National University College of Medicine, Seoul, Korea.,Department of Orthopedic Surgery, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
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5
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LaBelle MW, Marcus RE. CORR Synthesis: What Is the Role of Platelet-rich Plasma Injection in the Treatment of Tendon Disorders? Clin Orthop Relat Res 2020; 478:1817-1824. [PMID: 32732562 PMCID: PMC7371072 DOI: 10.1097/corr.0000000000001312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 04/27/2025] [Indexed: 01/31/2023]
Affiliation(s)
- Mark W LaBelle
- M. W. Labelle, R. E. Marcus, Department of Orthopaedic Surgery, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Randall E Marcus
- M. W. Labelle, R. E. Marcus, Department of Orthopaedic Surgery, Case Western Reserve University, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
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Autologous fibrin scaffolds: When platelet- and plasma-derived biomolecules meet fibrin. Biomaterials 2018; 192:440-460. [PMID: 30500725 DOI: 10.1016/j.biomaterials.2018.11.029] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/08/2018] [Accepted: 11/20/2018] [Indexed: 02/06/2023]
Abstract
The healing of vascularized mammalian tissue injuries initiate with hemostasis and clotting as part of biological defense system leading to the formation of a fibrin clot in which activated platelets are trapped to quickly stop bleeding and destroy microbials. In order to harness the therapeutic potential of biomolecules secreted by platelets and stemmed from plasma, blood deconstruction has allowed to yield autologous platelet-and plasma-derived protein fibrin scaffold. The autologous growth factors and microparticles stemmed from platelets and plasma, interact with fibrin, extracellular matrix, and tissue cells in a combinatorial, synergistic, and multidirectional way on mechanisms governing tissue repair. This interplay will induce a wide range of cell specifications during inflammation and repair process including but not limited to fibrogenesis, angiogenesis, and immunomodulation. As biology-as-a-drug approach, autologous platelet-and plasma-derived protein fibrin scaffold is emerging as a safe and efficacious natural human-engineered growth factor delivery system to repair musculoskeletal tissues, and skin and corneal ulcers and burns. In doing so, it acts as therapeutic agent not perfect but close to biological precision. However, this autologous, biocompatible, biodegradable, and long in vivo lasting strategy faces several challenges, including its non-conventional single dose-response effect, the lack of standardization in its preparation and application, and the patient's biological features. In this review, we give an account of the main events of tissue repair. Then, we describe the procedure to prepare autologous platelet-and plasma-derived protein fibrin scaffolds, and the rationale behind these biomaterials, and finally, we highlight the significance of strategic accuracy in their application.
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Bianchini E, Mancini F, Di Meo A, Stabile A, Buratta S, Moscati L, Pistilli A, Floridi C, Pepe M, Chiaradia E. Protective effects of platelet-rich plasma against lidocaine cytotoxicity on canine articular chondrocytes. Acta Vet Scand 2018; 60:63. [PMID: 30367652 PMCID: PMC6204030 DOI: 10.1186/s13028-018-0418-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 10/20/2018] [Indexed: 02/06/2023] Open
Abstract
Background Lidocaine (LD) is one of the most commonly used local anesthetics for performing arthroscopic surgery and managing of osteoarthritic pain in both human and veterinary medicine. However, over the last years, several studies have focused on the chondrotoxic effects of LD. In order to ensure that intra-articular lidocaine is safe to use, treatments aimed at mitigating chondrocyte death have recently been investigated. The aim of this study is to evaluate the possible protective effects of platelet-rich plasma (PRP) against LD cytotoxicity on canine articular chondrocytes. Results Articular canine chondrocytes, were exposed to 1% or 1.8% LD alone or in co-presence with 10% PRP for 30 min. In order to evaluate the effects of PRP pre-treatments, experiments were carried out on cells cultured in serum-free medium-or in medium supplemented with 10% PRP or 10% fetal bovine serum. Cell viability was evaluated by methyl thiazolyl tetrazolium assay and cell apoptosis was analyzed by flow cytometry using annexin V-fluorescein isothiocyanate/propidium iodide. The results showed that LD significantly reduced canine chondrocytes viability, probably due to apoptosis induction. Pre-treatment or the co-presence of PRP in the media restored the number of viable chondrocytes. The PRP also seemed to protect the cells from LD-induced apoptosis. Conclusions Pre-treatments and/or the simultaneous administration of PRP reduced LD-induced cytotoxicity in canine chondrocytes. Further in vivo studies are required to determine whether PRP can be used as a save protective treatment for dogs receiving intra-articular LD injections.
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8
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Ghosh S, Qi R, Carter KA, Zhang G, Pfeifer BA, Lovell JF. Loading and Releasing Ciprofloxacin in Photoactivatable Liposomes. Biochem Eng J 2018; 141:43-48. [PMID: 31105464 DOI: 10.1016/j.bej.2018.10.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We demonstrate that ciprofloxacin can be actively loaded into liposomes that contain small amounts of porphyrin-phospholipid (PoP). PoP renders the liposomes photoactivatable, so that the antibiotic is released from the carrier under red light irradiation (665 nm). The use of 2 molar % PoP in the liposomes accommodated active loading of ciprofloxacin. Further inclusion of 2 molar % of an unsaturated phospholipid accelerated light-triggered drug release, with more than 90 % antibiotic release from the liposomes occurring in less than 30 seconds. With or without laser treatment, ciprofloxacin PoP liposomes inhibited the growth of Bacillus subtilis in liquid media, apparently due to uptake of the liposomes by the bacteria. However, when liposomes were first separated from smaller molecules with centrifugal filtration, only the filtrate from laser-treated liposomes was bactericidal, confirming effective release of active antibiotic. These results establish the feasibility of remote loading antibiotics into photoactivatable liposomes, which could lead to opportunities for enhanced localized antibiotic therapy.
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Affiliation(s)
- Sanjana Ghosh
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Ruiquan Qi
- Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Kevin A Carter
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Guojian Zhang
- Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Blaine A Pfeifer
- Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
| | - Jonathan F Lovell
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York, 14260, USA
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9
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Kolber MJ, Purita J, Paulus C, Carreno JA, Hanney WJ. Platelet-Rich Plasma: Basic Science and Biological Effects. Strength Cond J 2018. [DOI: 10.1519/ssc.0000000000000402] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Chiu CH, Lei KF, Yeh WL. Development of a co-culture device for the study of human tenocytes in response to the combined stimulation of electric field and platelet rich plasma (PRP). Biomed Microdevices 2018; 19:69. [PMID: 28779376 DOI: 10.1007/s10544-017-0214-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
One of the objectives of rotator cuff repairs is to achieve biological healing and recovery in the tendon-bone zone. Some clinical evaluations reported the feasibility of tendon healing based on the stimulations of electric field and platelet-rich plasma (PRP). However, because of lack of appropriate tool for in vitro primary culture under complicated conditions, the efficacy and standard protocol of these healing approaches are still controversial among clinical experts. In this study, a novel co-culture device was developed for the study of tenocytes proliferation under single and combined stimulations of electric field and PRP. The device was a culture well divided into three sub-chambers separated by a barrier and embedded with a pair of parallel plate electrodes. Tenocytes and PRP gel could be respectively loaded into the sub-chambers and cultured with interlinked medium. Hence, tenocytes could concurrently receive a uniform electric field and platelet-derived growth factors by diffusion. Results revealed that the proliferation of tenocytes could be significantly enhanced by these stimulations. The device provides a precise and practical approach for the in vitro study of tendon healing, especially for PRP study. Moreover, optimization of the conditions of electric field and PRP could be determined by in vitro screening procedure before surgery to provide a personalized therapy.
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Affiliation(s)
- Chih-Hao Chiu
- Bone and Joint Research Center, Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan.,Department of Orthopedic Surgery, Taoyuan Chang Gung Memorial Hospital, Taoyuan, Taiwan.,PhD Program in Biomedical Engineering, Chang Gung University, Taoyuan, Taiwan
| | - Kin Fong Lei
- Graduate Institute of Medical Mechatronics, Chang Gung University, Taoyuan, Taiwan. .,Department of Radiation Oncology, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan.
| | - Wen-Ling Yeh
- Department of Orthopedic Surgery, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan. .,Musculoskeletal Research Center, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan.
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Carmona JU, Gómez WA, López C. Could Platelet-Rich Plasma Be a Clinical Treatment for Horses With Laminitis? J Equine Vet Sci 2018. [DOI: 10.1016/j.jevs.2017.11.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Platelet-rich plasma: combinational treatment modalities for musculoskeletal conditions. Front Med 2017; 12:139-152. [DOI: 10.1007/s11684-017-0551-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 04/30/2017] [Indexed: 12/12/2022]
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13
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Jo CH, Lee SY, Yoon KS, Shin S. Effects of Platelet-Rich Plasma With Concomitant Use of a Corticosteroid on Tenocytes From Degenerative Rotator Cuff Tears in Interleukin 1β-Induced Tendinopathic Conditions. Am J Sports Med 2017; 45:1141-1150. [PMID: 28061032 DOI: 10.1177/0363546516681294] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND A corticosteroid injection is commonly used to treat tendinopathy, but it has been associated with negative effects on tendon homeostasis. Platelet-rich plasma (PRP) is known to have proliferative and anabolic effects as well as cytoprotective effects against corticosteroids on tenocytes. However, the combined effects of a corticosteroid and PRP on the anti-inflammatory, matrix synthesis, and cytoprotective potential of tenocytes in conditions simulating tendinopathy have not been investigated. PURPOSE To assess the effects of PRP on tenocytes from degenerative rotator cuff tears with the concomitant use of a corticosteroid in interleukin 1β (IL-1β)-induced tendinopathic conditions. STUDY DESIGN Controlled laboratory study. METHODS Tenocytes were enzymatically isolated and cultured from patients with degenerative rotator cuff tears. PRP was prepared using a plateletpheresis system, and growth factor concentrations were measured. To evaluate the gene expression of proinflammatory and anti-inflammatory cytokines, enzymes and their inhibitors, and matrix molecules, cells were cultured with 1 ng/mL IL-1β, 1 μM dexamethasone, and 10% (vol/vol) platelet-poor plasma (PPP) and PRP of 200, 1000, and 4000 × 103/μL; quantitative real-time reverse transcriptase polymerase chain reaction was also performed. Western blotting was performed to investigate the protein synthesis of degradative enzymes and their inhibitors. Cell viability, apoptosis, and senescence assays were also conducted. RESULTS PRP did not interfere with the anti-inflammatory effects of dexamethasone on tenocytes pretreated with IL-1β, but it increased the synthesis of tissue inhibitor of metalloproteinase (TIMP)-1 and -3. Meanwhile, PRP did not induce anti-inflammatory cytokines that had been suppressed with a corticosteroid. It did increase the type I/III collagen ratio mainly through the suppression of type III collagen expression. PRP reversed the decreased viability, increased apoptosis, and induced senescence with IL-1β and a corticosteroid. CONCLUSION This study shows that the addition of PRP does not interfere with the anti-inflammatory effects of a corticosteroid on IL-1β-treated tenocytes from degenerative rotator cuff tears but that it does avoid the deleterious side effects of a corticosteroid. CLINICAL RELEVANCE PRP can be clinically useful with a corticosteroid as a treatment for tendinopathy.
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Affiliation(s)
- Chris Hyunchul Jo
- Department of Orthopedic Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Seung Yeon Lee
- Department of Orthopedic Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kang Sup Yoon
- Department of Orthopedic Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Sue Shin
- Department of Laboratory Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
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14
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Durant TJS, Dwyer CR, McCarthy MBR, Cote MP, Bradley JP, Mazzocca AD. Protective Nature of Platelet-Rich Plasma Against Chondrocyte Death When Combined With Corticosteroids or Local Anesthetics. Am J Sports Med 2017; 45:218-225. [PMID: 27582279 DOI: 10.1177/0363546516664161] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The use of corticosteroids and local anesthetics to treat osteoarthritis has established benefits, including relief of pain and increased range of motion, but may also have the potential to lead to tissue atrophy or degeneration, specifically on chondrocytes. There is growing evidence that platelet-rich plasma (PRP) has anti-inflammatory characteristics that can limit the cytotoxic effects of corticosteroids and local anesthetics. Hypothesis/Purpose: The purpose of this study was to determine the effects of PRP in chondrocyte cultures when combined with corticosteroids or local anesthetics. The hypothesis of this study was that PRP would (1) dampen the negative effects on chondrocyte viability and (2) improve chondrocyte proliferation seen with corticosteroid or local anesthetic treatment alone. STUDY DESIGN Controlled laboratory study. METHODS Peripheral blood was obtained from 8 healthy participants, followed by centrifugation to obtain PRP. Human chondrocytes were treated with PRP alone or in combination with corticosteroids or local anesthetics. Saline (concentration of 0.9%) served as the control. Luminescence and radioactive thymidine assays were performed to examine chondrocyte viability and proliferation, respectively. Cell exposures of 0, 5, 10, and 30 minutes were used for viability and 120 hours for proliferation. RESULTS The presence of PRP significantly limited the negative effect on chondrocyte viability at tested time points for the examined corticosteroids and local anesthetics ( P < .05). PRP in addition to corticosteroids and local anesthetics significantly improved chondrocyte proliferation ( P < .05). CONCLUSION The addition of PRP can significantly reduce the cytotoxic effects of corticosteroids and/or local anesthetics applied to chondrocytes. PRP can improve the proliferation of chondrocytes compared with corticosteroids or local anesthetics alone. CLINICAL RELEVANCE With the use of corticosteroids and local anesthetics for temporary symptomatic relief and improvement of function to treat the chronic progressive nature of osteoarthritis, long-term negative effects of these agents can be limited with the parallel use of PRP.
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Affiliation(s)
- Thomas J S Durant
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Corey R Dwyer
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Mary Beth R McCarthy
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Mark P Cote
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - James P Bradley
- Center for Sports Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Augustus D Mazzocca
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut, USA
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15
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PRP Treatment Efficacy for Tendinopathy: A Review of Basic Science Studies. BIOMED RESEARCH INTERNATIONAL 2016; 2016:9103792. [PMID: 27610386 PMCID: PMC5004020 DOI: 10.1155/2016/9103792] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 07/08/2016] [Accepted: 07/20/2016] [Indexed: 11/18/2022]
Abstract
Platelet-Rich Plasma (PRP) has been widely used in orthopaedic surgery and sport medicine to treat tendon injuries. However, the efficacy of PRP treatment for tendinopathy is controversial. This paper focuses on reviewing the basic science studies on PRP performed under well-controlled conditions. Both in vitro and in vivo studies describe PRP's anabolic and anti-inflammatory effects on tendons. While some clinical trials support these findings, others refute them. In this review, we discuss the effectiveness of PRP to treat tendon injuries with evidence presented in basic science studies and the potential reasons for the controversial results in clinical trials. Finally, we comment on the approaches that may be required to improve the efficacy of PRP treatment for tendinopathy.
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Karaduman M, Okkaoglu MC, Sesen H, Taskesen A, Ozdemir M, Altay M. Platelet-rich plasma versus open surgical release in chronic tennis elbow: A retrospective comparative study. J Orthop 2016; 13:10-4. [PMID: 26955228 DOI: 10.1016/j.jor.2015.12.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 12/24/2015] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To compare short and mid-term results in the treatment of chronic elbow tendinosis with platelet-rich plasma (PRP) or Nirschl surgical technique. METHOD A retrospective study was conducted on patients with chronic lateral epicondylitis, treated by Nirschl surgical technique (50 elbows) or PRP (60 elbows). Outcome was evaluated with Visual Analog Score (VAS), Mayo Elbow Scores and grip strength measurements. RESULTS VAS and Mayo Elbow Scores of the PRP group had improved as a mean of 83% (p = 0.0001), 74% (p = 0.0001) over baseline and 34.2 pounds gain of grip strength. CONCLUSION The PRP seems to be better for pain relief and functionality in the short and mid-term periods.
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Affiliation(s)
- Mert Karaduman
- Department of Orthopaedics and Traumatology, Ankara Keçiören Training and Research Hospital, 06380 Ankara, Turkey
| | - Mustafa Caner Okkaoglu
- Department of Orthopaedics and Traumatology, Ankara Keçiören Training and Research Hospital, 06380 Ankara, Turkey
| | - Hakan Sesen
- Department of Orthopaedics and Traumatology, Ankara Keçiören Training and Research Hospital, 06380 Ankara, Turkey
| | - Anil Taskesen
- Department of Orthopaedics and Traumatology, Ankara Keçiören Training and Research Hospital, 06380 Ankara, Turkey
| | - Mahmut Ozdemir
- Department of Orthopaedics and Traumatology, Ankara Keçiören Training and Research Hospital, 06380 Ankara, Turkey
| | - Murat Altay
- Department of Orthopaedics and Traumatology, Ankara Keçiören Training and Research Hospital, 06380 Ankara, Turkey
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Schwartzman D, Pasculle AW, Ceceris KD, Smith JD, Weiss LE, Campbell PG. An off-the-shelf plasma-based material to prevent pacemaker pocket infection. Biomaterials 2015; 60:1-8. [DOI: 10.1016/j.biomaterials.2015.04.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/17/2015] [Accepted: 04/21/2015] [Indexed: 12/18/2022]
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Nourissat G, Ornetti P, Berenbaum F, Sellam J, Richette P, Chevalier X. Does platelet-rich plasma deserve a role in the treatment of tendinopathy? Joint Bone Spine 2015; 82:230-4. [DOI: 10.1016/j.jbspin.2015.02.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/22/2014] [Indexed: 01/08/2023]
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New and emerging strategies in platelet-rich plasma application in musculoskeletal regenerative procedures: general overview on still open questions and outlook. BIOMED RESEARCH INTERNATIONAL 2015; 2015:846045. [PMID: 26075269 PMCID: PMC4436449 DOI: 10.1155/2015/846045] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2014] [Revised: 01/09/2015] [Accepted: 01/13/2015] [Indexed: 02/07/2023]
Abstract
Despite its pervasive use, the clinical efficacy of platelet-rich plasma (PRP) therapy and the different mechanisms of action have yet to be established. This overview of the literature is focused on the role of PRP in bone, tendon, cartilage, and ligament tissue regeneration considering basic science literature deriving from in vitro and in vivo studies. Although this work provides evidence that numerous preclinical studies published within the last 10 years showed promising results concerning the application of PRP, many key questions remain unanswered and controversial results have arisen. Additional preclinical studies are needed to define the dosing, timing, and frequency of PRP injections, different techniques for delivery and location of delivery, optimal physiologic conditions for injections, and the concomitant use of recombinant proteins, cytokines, additional growth factors, biological scaffolds, and stems cells to develop optimal treatment protocols that can effectively treat various musculoskeletal conditions.
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Brossi PM, Moreira JJ, Machado TSL, Baccarin RYA. Platelet-rich plasma in orthopedic therapy: a comparative systematic review of clinical and experimental data in equine and human musculoskeletal lesions. BMC Vet Res 2015; 11:98. [PMID: 25896610 PMCID: PMC4449579 DOI: 10.1186/s12917-015-0403-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 03/20/2015] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND 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.
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Affiliation(s)
- Patrícia M Brossi
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil.
| | - Juliana J Moreira
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil.
| | - Thaís S L Machado
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil.
| | - Raquel Y A Baccarin
- Department of Internal Medicine, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil.
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Yang SL, Zhang YB, Jiang ZT, Li ZZ, Jiang DP. Lidocaine potentiates the deleterious effects of triamcinolone acetonide on tenocytes. Med Sci Monit 2014; 20:2478-83. [PMID: 25433272 PMCID: PMC4259563 DOI: 10.12659/msm.891116] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Background Local anesthetics are commonly used for the treatment of a variety of tendinopathies in combination with corticosteroids injection. The goal of this study was to evaluate the effects of lidocaine and triamcinolone acetonide (TA) on cultured rat tenocytes and to determine whether there is a synergistic effect. Material/Methods Rat patellar tendon-derived tenocytes were cultured with or without TA and lidocaine, and the culture without any additive served as the control. Cell morphology and cell viability were evaluated. Expressions of tenocyte-related genes were measured by qRT-PCR. Results TA, when exposed to tenocytes in vitro, significantly decreased cell viability. The cells cultured with TA had a flattened shape. Moreover, the expressions of tenocyte-related genes in tenocytes were markedly decreased in the TA-treated group. We found that 1% lidocaine synergistically increased the deleterious effects of TA. Conclusions Our data provide evidence of the detrimental effects of these drugs on tendon tissues. Injection of TA in combination with 1% lidocaine should be used with caution.
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Affiliation(s)
- Shu-long Yang
- Department of Pediatric Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin, China (mainland)
| | - Yu-bo Zhang
- Department of Pediatric Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin, China (mainland)
| | - Zhi-tao Jiang
- Department of Pediatric Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin, China (mainland)
| | - Zhao-zhu Li
- Department of Pediatric Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin, China (mainland)
| | - Da-peng Jiang
- Department of Pediatric Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin, China (mainland)
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Muto T, Kokubu T, Mifune Y, Inui A, Harada Y, Yoshifumi, Takase F, Kuroda R, Kurosaka M. Temporary inductions of matrix metalloprotease-3 (MMP-3) expression and cell apoptosis are associated with tendon degeneration or rupture after corticosteroid injection. J Orthop Res 2014; 32:1297-304. [PMID: 24985902 DOI: 10.1002/jor.22681] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 06/10/2014] [Indexed: 02/04/2023]
Abstract
Corticosteroid injections are widely used to treat enthesopathy and tendinitis, but are also associated with possible side effects, such as tendon degeneration or rupture. However, the mechanism of tendon degeneration or rupture after corticosteroid injection remains controversial. The purpose of this study was to reveal the mechanism of tendon degeneration or rupture after injection of triamcinolone acetonide (TA) or prednisolone (PSL). Forty-two rats were divided into 3 groups: A normal saline injection group (control group), a TA injection group, and a PSL injection group; the normal saline or corticosteroid was injected around the Achilles tendon. One or 3 weeks after injection, the tendons were subjected to biomechanical testing and histological analysis. At 1 week, the biomechanical strength was significantly lower in the corticosteroid groups. Histological analysis, at 1-week post-injection, showed collagen attenuation, increased expression of MMP-3 and apoptotic cells in the corticosteroid groups. The histological changes and biomechanical weaknesses of the tendon were not seen at 3 weeks. These alterations appeared to be involved in tendon degeneration or rupture after corticosteroid injection.
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Affiliation(s)
- Tomoyuki Muto
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Hyogo, 650-0017, Japan
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Platelet concentration in platelet-rich plasma affects tenocyte behavior in vitro. BIOMED RESEARCH INTERNATIONAL 2014; 2014:630870. [PMID: 25147809 PMCID: PMC4132404 DOI: 10.1155/2014/630870] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 07/03/2014] [Indexed: 01/08/2023]
Abstract
Since tendon injuries and tendinopathy are a growing problem, sometimes requiring surgery, new strategies that improve conservative therapies are needed. Platelet-rich plasma (PRP) seems to be a good candidate by virtue of its high content of growth factors, most of which are involved in tendon healing. This study aimed to evaluate if different concentrations of platelets in PRP have different effects on the biological features of normal human tenocytes that are usually required during tendon healing. The different platelet concentrations tested (up to 5 × 10(6) plt/µL) stimulated differently tenocytes behavior; intermediate concentrations (0.5 × 10(6), 1 × 10(6) plt/µL) strongly induced all tested processes (proliferation, migration, collagen, and MMPs production) if compared to untreated cells; on the contrary, the highest concentration had inhibitory effects on proliferation and strongly reduced migration abilities and overall collagen production but, at the same time, induced increasing MMP production, which could be counterproductive because excessive proteolysis could impair tendon mechanical stability. Thus, these in vitro data strongly suggest the need for a compromise between extremely high and low platelet concentrations to obtain an optimal global effect when inducing in vivo tendon healing.
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Dean BJF, Lostis E, Oakley T, Rombach I, Morrey ME, Carr AJ. The risks and benefits of glucocorticoid treatment for tendinopathy: a systematic review of the effects of local glucocorticoid on tendon. Semin Arthritis Rheum 2013; 43:570-6. [PMID: 24074644 DOI: 10.1016/j.semarthrit.2013.08.006] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 08/27/2013] [Accepted: 08/28/2013] [Indexed: 02/01/2023]
Abstract
OBJECTIVE Our primary objective was to summarise the known effects of locally administered glucocorticoid on tendon tissue and tendon cells. METHODS We conducted a systematic review of the scientific literature using the PRISMA and Cochrane guidelines of the Medline database using specific search criteria. The search yielded 50 articles, which consisted of 13 human studies, 36 animal studies and one combined human/animal study. RESULTS Histologically, there was a loss of collagen organisation (6 studies) and an increase in collagen necrosis (3 studies). The proliferation (8 studies) and viability (9 studies) of fibroblasts was reduced. Collagen synthesis was decreased in 17 studies. An increased inflammatory cell infiltrate was shown in 4 studies. Increased cellular toxicity was demonstrated by 3 studies. The mechanical properties of tendon were investigated by 18 studies. Descriptively, 6 of these studies showed a decrease in mechanical properties, 3 showed an increase, while the remaining 9 showed no significant change. A meta-analysis of the mechanical data revealed a significant deterioration in mechanical properties, with an overall effect size of -0.67 (95% CI = 0.01 to -1.33) (data from 9 studies). CONCLUSIONS Overall it is clear that the local administration of glucocorticoid has significant negative effects on tendon cells in vitro, including reduced cell viability, cell proliferation and collagen synthesis. There is increased collagen disorganisation and necrosis as shown by in vivo studies. The mechanical properties of tendon are also significantly reduced. This review supports the emerging clinical evidence that shows significant long-term harms to tendon tissue and cells associated with glucocorticoid injections.
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Affiliation(s)
- Benjamin John Floyd Dean
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), Botnar Research Centre, Institute of Musculoskeletal Sciences, Nuffield Orthopaedic Centre, Windmill Rd, Oxford OX3 7LD, UK.
| | - Emilie Lostis
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), Botnar Research Centre, Institute of Musculoskeletal Sciences, Nuffield Orthopaedic Centre, Windmill Rd, Oxford OX3 7LD, UK
| | - Thomas Oakley
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), Botnar Research Centre, Institute of Musculoskeletal Sciences, Nuffield Orthopaedic Centre, Windmill Rd, Oxford OX3 7LD, UK
| | - Ines Rombach
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), Botnar Research Centre, Institute of Musculoskeletal Sciences, Nuffield Orthopaedic Centre, Windmill Rd, Oxford OX3 7LD, UK
| | - Mark E Morrey
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), Botnar Research Centre, Institute of Musculoskeletal Sciences, Nuffield Orthopaedic Centre, Windmill Rd, Oxford OX3 7LD, UK
| | - Andrew J Carr
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), Botnar Research Centre, Institute of Musculoskeletal Sciences, Nuffield Orthopaedic Centre, Windmill Rd, Oxford OX3 7LD, UK
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Dallaudière B, Meyer P, Hummel V, Perozziello A, Peuchant A, Moreau-Durieux MH, Silvestre A, Pelé E, Wakim N, Loriaut P, Boyer P, Schouman-Claeys E, Serfaty JM, Pesquer L. Efficacy of second intra-tendinous platelet-rich-plasma injection in case of incomplete response of the first injection: three-year follow up experience. Diagn Interv Imaging 2013; 94:871-7. [PMID: 23931981 DOI: 10.1016/j.diii.2013.05.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE Tendinopathy is a frequent and ubiquitous disease developing early disorganized collagen fibers with neo-angiogenesis on histology. Peritendinous injection of corticosteroid is the commonly accepted strategy despite the absence of inflammation in tendinopathy. Platelet-rich plasma (PRP) might be a useful strategy to rapidly accelerate healing of the tendinopathy but there is a lack ok knowledge about the amount of PRP to be injected and the opportunity of a second injection in case of partial pain relief. The aim of our study was to assess the potential therapeutic effect of early second PRP intra-tendinous to treat persistent painful tendon tear and tendinosis in a long-term follow-up by ultrasonography (US) and clinical data in case of incomplete efficiency of first PRP treatment injection. MATERIALS AND METHODS Twenty-four consecutive patients referred for US treatment of tendon tear or tendinosis (T+) were included retrospectively. All had previously received a single intra-tendinous injection of PRP under US guidance (PRPT+) and benefited of a second PRP injection (PRPT2+) under US guidance in order to treat persistent painful. US and clinical data were collected for each anatomic compartment for upper and lower limbs before treatment (D0), 6 weeks (W6) after first treatment, 6 weeks (W12) after second treatment and until 32-month follow-up. We used Mac Nemar test and regression model to compare US and clinical data. RESULTS The residual US size of lesions was not significantly lower at W12 after PRPT2+ as compared to W6 (P=0.86 in upper and P=NS in lower member) independently of age (P=0.22), gender (P=0.97) and kind of tendinopathy (P=NS). Quick dash test values and WOMAC values were not significantly lower in PRPT+ at W12 (average: 21.5 months) as compared to W6 (P>0.66) and long-term follow-up (P>0.75) independently of age (P=0.39), gender (P=0.63) and kind of tendinopathy (P=NS). Nevertheless, comparison between D0 and long-term follow-up (LTF) functionnal score was statistically significant (p<0.001 in upper and lower member). CONCLUSION Our study suggests that second early intra-tendinous PRP injection under US guidance does not permit rapid decrease of tendinopathy area in US, nor does it quickly improve clinical pain and functional data in case of incomplete efficiency of first PRP injection. However, in long-term follow-up, patients improved their ability to mobilize pathologic tendons.
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Affiliation(s)
- B Dallaudière
- Service de Radiologie, Hôpital universitaire Bichat, 46, rue Henri-Huchard, 75018 Paris, France; Université Paris-Diderot, 5, rue Thomas-Mann, 75205 Paris cedex 13, France; Inserm U698, Hôpital universitaire Bichat, Secteur C.-Bernard, 46, rue Henri-Huchard, 75877 Paris cedex 18, France.
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Beitzel K, McCarthy MB, Cote MP, Apostolakos J, Russell RP, Bradley J, ElAttrache NS, Romeo AA, Arciero RA, Mazzocca AD. The effect of ketorolac tromethamine, methylprednisolone, and platelet-rich plasma on human chondrocyte and tenocyte viability. Arthroscopy 2013; 29:1164-74. [PMID: 23809450 DOI: 10.1016/j.arthro.2013.04.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 04/04/2013] [Accepted: 04/12/2013] [Indexed: 02/02/2023]
Abstract
PURPOSE The purpose of this study was to evaluate the effect on cell viability of the isolated and combined use of allogeneic platelet-rich plasma (PRP) and ketorolac tromethamine on human chondrocytes and tenocytes in a highly controlled in vitro environment. METHODS PRP was produced from 8 subjects. Human chondrocytes (Lonza, Hopkinton, MA) and tenocytes isolated from samples of the long head of the biceps tendons were treated in culture with PRP, ketorolac tromethamine, and methylprednisolone, both alone and in combination. Control samples were treated in media containing 2% or 10% fetal bovine serum (FBS). Cells were exposed for 1 hour. Luminescence assays were obtained to examine cell viability after 24 hours and long-term effects on cell viability after 120 hours. Radioactive thymidine assay was used to measure proliferation after 120 hours. RESULTS For chondrocytes, cell viability (120 hours) increased significantly with the treatment of PRP alone (43,949 ± 28,104 cells; P < .001) and with the combination of ketorolac tromethamine and PRP (43,276 ± 31,208; P < .001), compared with the 2% FBS group (7,397 ± 470). Cell viability decreased significantly after exposure to methylprednisolone (1,323 ± 776; P < .001) and its combination with PRP (4,381 ± 5,116; p < .001). For tenocytes, cell viability (120 hours) was significantly higher with the treatment of PRP (61,287 ± 23,273; P < .001) and the combined treatment of ketorolac tromethamine and PRP (52,025 ± 17,307; P < .001), compared with the 2% FBS group (23,042 ± 2,973). Cell viability decreased significantly after exposure to methylprednisolone (3,934 ± 1,791; P = .001) and its combination with PRP (5,201 ± 2,834; P = .003), compared with 2% FBS. CONCLUSIONS Tendon and cartilage cells showed increased cell viability after an exposure to allogeneic PRP and ketorolac tromethamine. Exposure to methylprednisolone alone decreased cell viability, and addition of PRP could partially reverse this negative effect. CLINICAL RELEVANCE Intra-articular injections of pain-modifying or anti-inflammatory drugs are routinely given in orthopaedic practice. Among the many agents available for intra-articular injection, corticosteroids and local anesthetics are the most common in clinical practice. Potential detrimental side effects of intra-articular injections of corticosteroids and local anesthetics have prompted investigation into alternative treatment options such as combinations of PRP and ketorolac tromethamine. In vitro evaluation of their effect on cell viability might build a basis for further translational research and clinical application.
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Affiliation(s)
- Knut Beitzel
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06034, USA
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Efficacy of intra-tendinous injection of platelet-rich plasma in treating tendinosis: comprehensive assessment of a rat model. Eur Radiol 2013; 23:2830-7. [DOI: 10.1007/s00330-013-2926-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 05/07/2013] [Accepted: 05/12/2013] [Indexed: 12/27/2022]
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Karthik K, Carter-Esdale CW, Vijayanathan S, Kochhar T. Extensor Pollicis Brevis tendon damage presenting as de Quervain's disease following kettlebell training. Sports Med Arthrosc Rehabil Ther Technol 2013; 5:13. [PMID: 23731737 PMCID: PMC3680204 DOI: 10.1186/2052-1847-5-13] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Accepted: 05/29/2013] [Indexed: 01/20/2023]
Abstract
Kettlebell exercises are more efficient for an athlete to increase his or her muscle strength. However it carries the risk of injury especially in the beginners. A 39 year old gentleman came to our clinic with radial sided wrist pain following kettlebell exercises. Clinically patient had swelling and tenderness over the tendons in the first dorsal wrist compartment, besides Finklesten test was positive. Patient had a decreased excursion of the thumb when compared to the opposite side. Ultrasound/MRI scan revealed asymmetric thickening of the 1st compartment extensors extending from the base of the thumb to the wrist joint. Besides injury to the Extensor Pollicis Brevis (EPB) tendon by repetitive impact from kettlebell, leading to its split was identified. Detailed history showed that the injury might be due to off-centre handle holding during triceps strengthening exercises. Our report stresses the fact that kettlebell users should be taught about problems of off-center handle holding to avoid wrist injuries. Also, in Kettlebell users with De Quervains disease clinical and radiological evaluation should be done before steroid injection as this might lead to complete tendon rupture.
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29
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Muto T, Kokubu T, Mifune Y, Sakata R, Nagura I, Nishimoto H, Harada Y, Nishida K, Kuroda R, Kurosaka M. Platelet-rich plasma protects rotator cuff-derived cells from the deleterious effects of triamcinolone acetonide. J Orthop Res 2013; 31:976-82. [PMID: 23280560 DOI: 10.1002/jor.22301] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Accepted: 11/29/2012] [Indexed: 02/04/2023]
Abstract
Triamcinolone acetonide (TA) injections are widely used to treat enthesopathy, but they may induce adverse effects such as tendon impairment and rupture. Platelet-rich plasma (PRP) is a blood fraction containing high platelet concentrations and various growth factors that play a role in tissue repair processes. The purpose of this study is to investigate whether TA has deleterious effects on human rotator cuff-derived cells, and if PRP can protect these cells from the effects of TA. Human rotator cuff-derived cells were cultured with and without TA and PRP, and the culture without any additive served as the control. Cell morphology was assessed at days 7 and 21. Cell viability was evaluated at days 1, 7, 14, and 21 by a water-soluble tetrazolium salt assay. Induction of apoptosis was measured by immunofluorescence staining and flow cytometry at day 7. Induction of cleaved caspase-3 was measured by immunofluorescence staining at day 7. The cells cultured with TA had a flattened and polygonal shape at day 7. The cells cultured with both TA and PRP were similar in appearance to control cells. Exposure to TA also significantly decreased cell viability, but cell viability did not decrease when PRP was added along with TA. The number of apoptotic cells increased with TA exposure, while addition of PRP prevented cell apoptosis. In conclusion, the deleterious effect of TA was prevented by PRP, which can be used as a protective agent for patients receiving local TA injections.
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Affiliation(s)
- Tomoyuki Muto
- Department of Orthopaedic Surgery, Kobe University, Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Hyogo 650-0017, Japan
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Mazzocca AD, McCarthy MBR, Intravia J, Beitzel K, Apostolakos J, Cote MP, Bradley J, Arciero RA. An in vitro evaluation of the anti-inflammatory effects of platelet-rich plasma, ketorolac, and methylprednisolone. Arthroscopy 2013; 29:675-83. [PMID: 23395471 DOI: 10.1016/j.arthro.2012.12.005] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 11/27/2012] [Accepted: 12/05/2012] [Indexed: 02/02/2023]
Abstract
PURPOSE The purpose of this study was to quantify the extent of the anti-inflammatory effect of platelet-rich plasma (PRP) in a controlled in vitro environment. METHODS Through the stimulation of human umbilical vein endothelial cells with inflammatory cytokines (tumor necrosis factor α and interferon γ), cell adhesion molecule expression (E-selectin, vascular cell adhesion molecule, and human leukocyte antigen DR) and PRP's anti-inflammatory effect can be measured. PRP was produced from 3 individuals using a single-spin (PRPLP) process. Treatment groups include negative (unstimulated) controls, positive (stimulated) controls, ketorolac tromethamine, methylprednisolone, PRP, ketorolac-PRP, and methylprednisolone-PRP. A fluorescence assay of the cellular inflammation markers was measured by the BioTek Synergy HT plate reader (BioTek Instruments, Winooski, VT) at 0, 1, 2, and 5 days. RESULTS At days 2 and 5, methylprednisolone treatment showed a 2.1- to 5.8-fold reduction (P < .05) in inflammation markers over PRP. In addition, PRP and ketorolac showed a 1.4- to 2.5-fold reduction (P < .05) in cellular inflammation markers over the control. There was no statistically significant difference between ketorolac and PRP. CONCLUSIONS Although PRP and ketorolac reduced cellular inflammation markers (E-selectin, vascular cell adhesion molecule, and human leukocyte antigen DR) compared with control, neither caused as great a reduction as methylprednisolone. CLINICAL RELEVANCE Although PRP and ketorolac did not produce as significant a reduction in cellular inflammation markers as methylprednisolone, they reduced cellular inflammation compared with the control. These agents may have clinical application as injectable anti-inflammatory medications.
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Affiliation(s)
- Augustus D Mazzocca
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut 06034, USA.
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Baksh N, Hannon CP, Murawski CD, Smyth NA, Kennedy JG. Platelet-rich plasma in tendon models: a systematic review of basic science literature. Arthroscopy 2013; 29:596-607. [PMID: 23352397 DOI: 10.1016/j.arthro.2012.10.025] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 09/30/2012] [Accepted: 10/17/2012] [Indexed: 02/02/2023]
Abstract
PURPOSE To perform a systematic review of the basic science literature on the use of platelet-rich plasma (PRP) in tendon models. METHODS We searched the PubMed/Medline and Embase databases in June 2012 using the following parameters: ((tenocytes OR tendon OR tendinitis OR tendinosis OR tendinopathy) AND (platelet rich plasma OR PRP OR autologous conditioned plasma OR ACP)). The inclusion criteria for full-text review were in vivo and in vitro studies examining the effects of PRP on tendons and/or tenocytes. Clinical studies were excluded. Only studies published in peer-reviewed journals that compared PRP directly with a control were included. Data were extracted based on a predefined data sheet, which included information on PRP preparation, study methods, and results. Studies were analyzed for trends, comparing and contrasting the reported effects of PRP. RESULTS The search yielded 31 articles for inclusion in our review. Of the studies, 22 (71%) reported platelet concentrations in the PRP; 6 (19%) reported cytology. Eight in vivo studies found decreased tendon repair time, increased fiber organization, or both with PRP treatment. Eight in vitro studies reported that PRP treatment increased cell proliferation; 7 reported an increase in growth factor expression. Three in vivo studies found increased vascularity, and 4 found increased tensile strength with PRP treatment. CONCLUSIONS In the basic science studies evaluated, it appears that PRP confers several potential effects on tendon models compared with a control. However, the literature is inconsistent with regard to reporting the methods of preparation of PRP and in reporting platelet concentrations and cytology. CLINICAL RELEVANCE Establishing proof of concept for PRP may lead to further high-quality clinical studies in which the appropriate indications can be defined.
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Affiliation(s)
- Nikolas Baksh
- Hospital for Special Surgery, New York, New York, USA
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Zhang J, Keenan C, Wang JHC. The effects of dexamethasone on human patellar tendon stem cells: implications for dexamethasone treatment of tendon injury. J Orthop Res 2013; 31:105-10. [PMID: 22886634 PMCID: PMC3498577 DOI: 10.1002/jor.22193] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Accepted: 06/25/2012] [Indexed: 02/06/2023]
Abstract
Injection of Dexamethasone (Dex) is commonly used in clinics to treat tendon injury such as tendinopathy because of its anti-inflammatory capabilities. However, serious adverse effects have been reported as a result of Dex treatment, such as impaired tendon healing and tendon rupture. Using both in vitro and in vivo approaches, this study was to determine the effects of Dex treatment on the proliferation and differentiation of human tendon stem cells (hTSCs), which can directly impact tendon healing. We found that Dex treatment stimulated cell proliferation at lower concentrations (<1,000 nM), whereas a high concentration (1,000 nM) decreased cell proliferation. Moreover, at all concentrations used (5, 10, 100, and 1,000 nM), Dex treatment induced non-tenocyte differentiation of hTSCs, as evidenced by a change in cell shape, a nearly complete suppression of collagen type I expression, and an upregulation of non-tenocyte related genes (PPARγ and Sox-9), which was especially evident when higher concentrations (>10 nM) of Dex were used. Implantation of Dex-treated hTSCs for a short time (3 weeks) resulted in the extensive formation of fatty tissues, cartilage-like tissues, and bony tissues. These findings suggest that Dex treatment in clinics may cause a paradoxical effect on the injured tendons it is supposed to treat: by inducing non-tenocyte differentiation of hTSCs, Dex treatment depletes the stem cell pool and leads to the formation of non-tendinous tissues (e.g., fatty and cartilage-like tissues), which make tendon susceptible to rupture.
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Affiliation(s)
| | | | - James H-C. Wang
- Correspondence to: James H-C. Wang, PhD, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, 210 Lothrop Street, BST, E1640, Pittsburgh, PA 15213, Tel.: 412-648-9102; Fax: 412-648-8548,
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Abstract
Platelet-rich plasma (PRP) is a fraction of whole blood containing powerful growth factors and cytokines. Preclinical studies suggest PRP may be useful for tendon repair or regeneration. Clinical investigations have focused on the treatment of chronic lateral epicondylar tendinopathy and rotator cuff pathology. Multiple controlled studies support the use of PRP for chronic tennis elbow. Rotator cuff studies, however, have produced conflicting results based on PRP formulation, surgical technique, and size of tendon tear. This article explores the scientific rational for using PRP, its various formulations, and the emerging clinical data. Future potential applications are also explored.
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Affiliation(s)
- Allan Mishra
- Department of Orthopaedic Surgery, Menlo Medical Clinic, Stanford University Medical Center, 1300 Crane Street, Menlo Park, CA 94025, USA.
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Andia I, Abate M. Platelet-rich plasma injections for tendinopathy and osteoarthritis. ACTA ACUST UNITED AC 2012. [DOI: 10.2217/ijr.12.36] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Carofino B, Chowaniec DM, McCarthy MB, Bradley JP, Delaronde S, Beitzel K, Cote MP, Arciero RA, Mazzocca AD. Corticosteroids and local anesthetics decrease positive effects of platelet-rich plasma: an in vitro study on human tendon cells. Arthroscopy 2012; 28:711-9. [PMID: 22264830 DOI: 10.1016/j.arthro.2011.09.013] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 09/19/2011] [Accepted: 09/24/2011] [Indexed: 02/07/2023]
Abstract
PURPOSE To determine the effects of mixing anesthetics or corticosteroids with platelet-rich plasma (PRP) on human tenocytes in vitro. METHODS Two separate protocols (double spin and single spin) were used to obtain homologous PRP from the blood of 8 healthy volunteers. Discarded tendon acquired during biceps tenodesis served as tendon specimens for all experiments. After cell isolation, tenocytes were treated in culture with PRP alone or in combination with corticosteroids and/or anesthetics. Fetal bovine serum in concentrations of 2% and 10% served as controls. Cell exposure times of 5, 10, and 30 minutes were used. Radioactive thymidine and luminescence assays were obtained to examine cell proliferation and viability. RESULTS The presence of lidocaine, bupivacaine, or methylprednisolone resulted in significantly less proliferation than the negative 2% fetal bovine serum control (P < .05). When we compared groups, both lidocaine and bupivacaine had a greater inhibitory effect than methylprednisolone (P < .05). At all time points, viability was significantly decreased in the presence of lidocaine, bupivacaine, or methylprednisolone compared with the negative control (P < .05). CONCLUSIONS The addition of either anesthetics or corticosteroids to PRP resulted in statistically significant decreases in tenocyte proliferation and cell viability. These results suggest that incorporation of anesthetics or corticosteroids, either alone or in combination, with PRP injection may compromise the potentially beneficial in vitro effects of isolated PRP on tendon cells and compromise cell viability at the site of tendon injury. CLINICAL RELEVANCE Anesthetics or corticosteroids either alone or in combination should be used carefully to preserve the proposed positive effects of PRP in the treatment of tendon injury.
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Affiliation(s)
- Bradley Carofino
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut 06030, USA
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Jo CH, Kim JE, Yoon KS, Shin S. Platelet-rich plasma stimulates cell proliferation and enhances matrix gene expression and synthesis in tenocytes from human rotator cuff tendons with degenerative tears. Am J Sports Med 2012; 40:1035-45. [PMID: 22366517 DOI: 10.1177/0363546512437525] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Platelet-rich plasma (PRP) contains various growth factors and appears to have a potential to promote tendon healing, but evidence is lacking regarding its effect on human tenocytes from rotator cuff tendons with degenerative tears. HYPOTHESIS Platelet-rich plasma stimulates cell proliferation and enhances matrix gene expression and synthesis in tenocytes isolated from human rotator cuff tendons with degenerative tears. STUDY DESIGN Controlled laboratory study. METHODS Tenocytes were enzymatically isolated and cultured. To evaluate cell proliferation, tenocytes were cultured with 10% (vol/vol) platelet-poor plasma (PPP), PRP activated with calcium, and PRP activated with calcium and thrombin at platelet concentrations of 100, 200, 400, 800, 1000, 2000, 4000, 8000, and 16,000 × 10(3)/µL for 14 days. Cell number was measured at days 7 and 14. To investigate matrix gene expression and synthesis, cells were cultured with a PPP or PRP gel (10% vol/vol) at a platelet concentration of 1000 × 10(3)/µL for 14 days. Quantitative real-time reverse transcriptase polymerase chain reaction was performed to determine the expressions of type I and III collagen, decorin, tenascin-C, and scleraxis, and measurements of total collagen and glycosaminoglycan (GAG) synthesis were conducted at days 7 and 14. RESULTS Platelet-rich plasma significantly increased cell proliferation at days 7 and 14 in a dose-dependent manner, and the addition of thrombin moved up the plateau of proliferation. Platelet-rich plasma significantly induced the gene expression of type I collagen at day 7 but not at day 14, while it significantly promoted that of type III both at days 7 and 14. The ratio of type III/I collagens did not change at days 7 and 14. The expressions of decorin and scleraxis significantly increased at day 14, whereas that of tenascin-C significantly increased at days 7 and 14. Platelet-rich plasma significantly increased total collagen synthesis at days 7 and 14 and GAG synthesis at day 14. CONCLUSION Platelet-rich plasma promoted cell proliferation and enhanced gene expression and the synthesis of tendon matrix in tenocytes from human rotator cuff tendons with degenerative tears. CLINICAL RELEVANCE These findings suggest that PRP might be used as a useful biological tool for regenerative healing of rotator cuff tears by enhancing the proliferation and matrix synthesis of tenocytes from tendons with degenerative tears.
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Affiliation(s)
- Chris Hyunchul Jo
- Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul, Korea.
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Kaleagasioglu F, Olcay E. Fluoroquinolone-Induced Tendinopathy: Etiology and Preventive Measures. TOHOKU J EXP MED 2012; 226:251-8. [DOI: 10.1620/tjem.226.251] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
| | - Ercan Olcay
- Department of Orthopedic Surgery, Kafkas University, Faculty of Medicine
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