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Mani R, Roopmani P, Rajendran J, Maharana S, Giri J. Cord blood platelet rich plasma (PRP) as a potential alternative to autologous PRP for allogenic preparation and regenerative applications. Int J Biol Macromol 2024; 262:129850. [PMID: 38296140 DOI: 10.1016/j.ijbiomac.2024.129850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 01/08/2024] [Accepted: 01/28/2024] [Indexed: 02/13/2024]
Abstract
As an abundant supplier of growth factors, chemokines and other bioactive molecules, platelet rich plasma (PRP) become a leading therapy for tissue regeneration. The PRP therapy is an inexpensive and feasible source of growth factor compared to commercial products however, the better source of platelets is the major challenge. Many researchers are skeptical about cord blood as an alternative source for the allogenic preparation of PRP. In the present study, we have compared adult peripheral and cord blood PRP for their regenerative capacity and immuno-modulatory nature. ELISA data indicates that the cord PRP contained a considerably higher amount of growth factors compared to adult PRP. In-vitro results indicate a significant increase in cell proliferation and migration with cord PRP treatment. The immunomodulatory evaluation shows cord blood PRP has better potential in switching activated macrophages to anti-inflammatory markers when compared with adult PRP, as well as the cytokines production indicates a significant reduction in the release of IFN-γ in cord PRP treatment. The study shows the beneficial effects of using cord blood PRP over adult PRP however, future studies are required to validate cord blood PRP as a permanent source for regenerative therapy.
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Affiliation(s)
- Rajesh Mani
- Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, Kandi, Telangana, India; Department of Microbiology, Immunology and Molecular Genetics, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Purandhi Roopmani
- Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, Kandi, Telangana, India
| | - Jayakumar Rajendran
- Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, Kandi, Telangana, India
| | - Sradhanjali Maharana
- Department of Obstetrics and Gynaecology, Malla Reddy Institute of Medical Sciences, Hyderabad, India
| | - Jyotsnendu Giri
- Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, Kandi, Telangana, India.
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Sharun K, Chandran D, Manjusha KM, Mankuzhy PD, Kumar R, Pawde AM, Dhama K, El-Husseiny HM, Amarpal. Advances and prospects of platelet-rich plasma therapy in veterinary ophthalmology. Vet Res Commun 2023; 47:1031-1045. [PMID: 36607500 DOI: 10.1007/s11259-022-10064-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/28/2022] [Indexed: 01/07/2023]
Abstract
In the recent decades, there has been a significant uptick on the use of platelet-rich plasma (PRP) as a better alternative for ophthalmologic therapies in pathologies, primarily of the ocular surface. PRP is a class of liquid platelet concentrate containing a supra-physiological concentration of platelets in a relatively small amount of plasma. Its potential to heal various tissues has piqued interest in its therapeutic application as a biomaterial in regenerative medicine. It is currently a popular therapeutic agent in plastic surgery, cardiothoracic surgery, reconstructive surgery, and even oral and maxillofacial surgery. Based on the data from in vitro and in vivo studies, it can be concluded that PRP possesses adequate therapeutic potential in ocular pathologies, especially those involving cornea. In addition, the high concentrations of growth factors (TGF-β, VEGF, EGF) present in the PRP accelerate the healing of the corneal epithelium. PRP has great therapeutic prospects in veterinary ophthalmology as a regenerative therapeutic modality. However, several variables are yet to be defined and standardized that can directly affect the efficacy of PRP application in different ophthalmic conditions. There is a shortage of research on the use of PRP in ocular surface defects compared to the number of studies and reports on the use of autologous and allogeneic serum eye drops. Therefore, a data-driven approach is required to generate consensus/guidelines for the preparation, characterization, and therapeutic use of PRP in veterinary ophthalmology. This review aims to inform readers of the latest research on PRP, including its preparation methods, physiological and biochemical properties, clinical applications in veterinary ophthalmology, and their safety and efficacy.
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Affiliation(s)
- Khan Sharun
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India.
| | - Deepak Chandran
- Department of Veterinary Sciences and Animal Husbandry, Amrita School of Agricultural Sciences, Amrita Vishwa Vidyapeetham University, Coimbatore, Tamil Nadu, 642109, India
| | - K M Manjusha
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Pratheesh D Mankuzhy
- Department of Physiology, Kerala Veterinary and Animal Sciences University, Pookode, Wayanad, Kerala, India
| | - Rohit Kumar
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Abhijit M Pawde
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Hussein M El-Husseiny
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo, 183-0054, Japan
- Department of Surgery, Anesthesiology, and Radiology, Faculty of Veterinary Medicine, Benha University, 13736, Toukh, Egypt
| | - Amarpal
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
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White C, Brahs A, Dorton D, Witfill K. Platelet-Rich Plasma: A Comprehensive Review of Emerging Applications in Medical and Aesthetic Dermatology. THE JOURNAL OF CLINICAL AND AESTHETIC DERMATOLOGY 2021; 14:44-57. [PMID: 34980960 PMCID: PMC8675348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Platelet-rich plasma (PRP) has been integrated into numerous treatment regimens for medical and aesthetic dermatology. While some of these approaches are well-established, many uses are underreported in the literature. We sought to identify and summarize the emerging dermatologic applications for PRP by conducting a comprehensive PubMed search of studies published between 2000 and 2020. These studies were reviewed to synthesize collection methods, treatment schedule, adverse effects, and the impact of therapy for new and emerging uses for PRP. In general, we identified positive treatment outcomes for skin rejuvenation, scar revision, alopecia, pigmentary disorders, lichen sclerosus, leprosy-induced peripheral neuropathy, plaque psoriasis, and nail disorders. Widely, therapy was well-tolerated and suitable for all reported phototypes. The variations in collection and application sequences make concrete recommendations difficult to discern, underscoring the need for a standardized approach to preparation and treatment methods. We hope this review serves as an outline for new and interesting uses for PRP and will help readers familiarize themselves with this exciting technology for comfortable integration into their practices.
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Affiliation(s)
- Christopher White
- Dr. White is with Dermatology Partners in Strongsville, Ohio
- Drs. Brahs, Dorton, and Witfill are with the Department of Dermatology, HCA Healthcare/USF Morsani College of Medicine, Largo Medical Center, in Largo, Florida
| | - Allyson Brahs
- Dr. White is with Dermatology Partners in Strongsville, Ohio
- Drs. Brahs, Dorton, and Witfill are with the Department of Dermatology, HCA Healthcare/USF Morsani College of Medicine, Largo Medical Center, in Largo, Florida
| | - David Dorton
- Dr. White is with Dermatology Partners in Strongsville, Ohio
- Drs. Brahs, Dorton, and Witfill are with the Department of Dermatology, HCA Healthcare/USF Morsani College of Medicine, Largo Medical Center, in Largo, Florida
| | - Kristin Witfill
- Dr. White is with Dermatology Partners in Strongsville, Ohio
- Drs. Brahs, Dorton, and Witfill are with the Department of Dermatology, HCA Healthcare/USF Morsani College of Medicine, Largo Medical Center, in Largo, Florida
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Xie X, Zhang Y, Zhao X, Liu T, Sun L. [Standardized management of platelet derivatives for tissue regeneration research and applications]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2021; 35:392-398. [PMID: 33719251 DOI: 10.7507/1002-1892.202011023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Objective To summary the standardized management in research and applications of platelet derivatives for tissue regeneration. Methods The related literature about bottlenecks and standardized management of platelet derivatives in recent years was reviewed and analyzed. Results Although the platelet derivatives are increasingly used to accelerate the regenerative processes of injured joint, skin, nerve, ligament/tendon, and alveolar bone, etc., the large variation in preparation methods, diverse nomenclature, incomplete reporting system, and lack of quantitative and standardized management of the preparation process have caused uncertainty and incomparability of research and application results. In recent years, there has been a trend towards standardized research and management of platelet derivatives. Conclusion The implementation of standardized research and quality management will contribute to promote the research and application of platelet derivatives in the field of tissue regeneration.
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Affiliation(s)
- Xingqin Xie
- National and Local Joint Stem Cell Research and Engineering Center for Aging Diseases, Harbin Heilongjiang, 150028, P.R.China;R&D Center, Tian Qing Stem Cell Co., Ltd., Harbin Heilongjiang, 150028, P.R.China
| | - Yi Zhang
- National and Local Joint Stem Cell Research and Engineering Center for Aging Diseases, Harbin Heilongjiang, 150028, P.R.China;R&D Center, Tian Qing Stem Cell Co., Ltd., Harbin Heilongjiang, 150028, P.R.China
| | - Xinxin Zhao
- R&D Center, Tian Qing Stem Cell Co., Ltd., Harbin Heilongjiang, 150028, P.R.China
| | - Tongxin Liu
- R&D Center, Tian Qing Stem Cell Co., Ltd., Harbin Heilongjiang, 150028, P.R.China
| | - Liping Sun
- Department of Obstetrics and Gynecology, Qiqihar Jianhua Hospital, Qiqihar Heilongjiang, 161006, P.R.China
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Krogh TP, Kjær SG, Blegvad‐Nissen J, Jensen P, Ellingsen T, Fredberg U. Ultrasound‐guided injection therapy with platelet‐rich plasma in recreational athletes with patellar tendinopathy: A randomized, single blinded, placebo‐controlled trial with 3 months follow‐up. TRANSLATIONAL SPORTS MEDICINE 2021. [DOI: 10.1002/tsm2.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thøger Persson Krogh
- Diagnostic Centre University Research Clinic for Innovative Patient PathwaysSilkeborg Regional Hospital Silkeborg Denmark
- Center for Sports Medicine Regional Hospital of Northern Denmark Hjørring Denmark
| | - Søren Geill Kjær
- Diagnostic Centre University Research Clinic for Innovative Patient PathwaysSilkeborg Regional Hospital Silkeborg Denmark
| | - Jesper Blegvad‐Nissen
- Diagnostic Centre University Research Clinic for Innovative Patient PathwaysSilkeborg Regional Hospital Silkeborg Denmark
| | - Pia Jensen
- Diagnostic Centre University Research Clinic for Innovative Patient PathwaysSilkeborg Regional Hospital Silkeborg Denmark
| | - Torkell Ellingsen
- Diagnostic Centre University Research Clinic for Innovative Patient PathwaysSilkeborg Regional Hospital Silkeborg Denmark
- Research Unit of Rheumatology Department of Clinical Research University of Southern DenmarkOdense University Hospital Odense Denmark
| | - Ulrich Fredberg
- Diagnostic Centre University Research Clinic for Innovative Patient PathwaysSilkeborg Regional Hospital Silkeborg Denmark
- Research Unit of Rheumatology Department of Clinical Research University of Southern DenmarkOdense University Hospital Odense Denmark
- Institute of Sports Medicine Copenhagen Bispebjerg Hospital Copenhagen Denmark
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Anitua E, Zalduendo M, Troya M, Alkhraisat MH. The influence of sodium citrate on the characteristics and biological activity of plasma rich in growth factors. Regen Med 2020; 15:2181-2192. [PMID: 33275449 DOI: 10.2217/rme-2020-0082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: This study investigated the effect of sodium citrate on the properties and biological activity of plasma rich in growth factors (PRGF). Methods: PRGF was obtained from trisodium citrate and plain extraction tubes. Hematological parameters, growth factors' release kinetics from both PRGF clots and their releasates' biological effect on human bone cells were evaluated. Results: The platelet enrichment factor, the growth factors' content and the release kinetic of PRGF were similar for both groups. The proliferation, collagen type I synthesis and tissue-nonspecific alkaline phosphatase activity of human osteoblasts showed no statistically significant differences. Conclusion: The use of sodium citrate does not influence the composition, the growth factors' release kinetics or the biological effect of PRGF, but it increases its clinical versatility.
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Affiliation(s)
| | | | - María Troya
- BTI - Biotechnology Institute, Vitoria, Spain
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Goggs R, Cremer S, Brooks MB. Evaluation of cytokine concentrations in a trehalose-stabilised lyophilised canine platelet product: a preliminary study. Vet Rec Open 2020; 7:e000366. [PMID: 32821395 PMCID: PMC7418665 DOI: 10.1136/vetreco-2019-000366] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 06/30/2020] [Accepted: 07/03/2020] [Indexed: 12/12/2022] Open
Abstract
Background Platelet transfusion is indicated for haemorrhage due to severe thrombocytopenia and for trauma associated coagulopathy. Febrile non-haemolytic transfusion reactions are a common complication of platelet transfusions in people and may be due to accumulated inflammatory cytokines. The present study aimed to determine the cytokine profile of a novel canine lyophilised platelet product following reconstitution, to assess the lyophilised platelets’ activation response to physiological platelet agonists and to compare the cytokine profiles of basal and stimulated canine lyophilised platelets. Methods Cell counts and biochemical analyses were conducted following reconstitution. Cytokine concentrations were measured with a canine-specific multiplex immunocapture assay and with an electrochemiluminescent ELISA. Aliquots of reconstituted product from three separate vials were activated for 10 minutes under non-stirred conditions using adenosine diphosphate, thrombin or convulxin and their cytokine concentrations compared with unactivated samples. Flow cytometry and light-transmission aggregometry were used to evaluate the product’s ability to express a procoagulant surface, degranulate and aggregate. Fresh platelet-rich plasma was used as a positive control. Results The product had a mean±SD particle count of 1.23±0.2×109/ml, contained platelets that expressed surface phosphatidylserine before agonist stimulation and was capable of aggregation in response to thrombin stimulation suggesting that the product may have haemostatic potential following in vivo administration. Cytokine concentrations measured by the immunocapture assay were generally low, while twofold to threefold increases relative to published intervals were noted for several cytokines using the ELISA. Concentrations of chemokine (C-X-C) motif ligand 8 and tumour necrosis factor-α were significantly increased as measured by the ELISA, but not by the immunocapture assay, while concentrations of KC-like were significantly increased as measured by the immunocapture assay. Stimulation with platelet agonists did not affect measured cytokine concentrations. Conclusion Further study of the effects of administration of this lyophilised platelet product is warranted.
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Affiliation(s)
- Robert Goggs
- Clinical Sciences, Cornell University College of Veterinary Medicine, Ithaca, New York, USA
| | - Signe Cremer
- Department of Veterinary Clinical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Marjory B Brooks
- Population Medicine and Diagnostic Sciences, Cornell University College of Veterinary Medicine, Ithaca, New York, USA
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Comparison of Two Anticoagulants for Pain Associated with Platelet-Rich Plasma Injections. Aesthetic Plast Surg 2020; 44:955-961. [PMID: 31722064 DOI: 10.1007/s00266-019-01541-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 11/03/2019] [Indexed: 01/08/2023]
Abstract
BACKGROUND AND AIM Platelet-rich plasma (PRP) has long been used in skin rejuvenation and hair loss treatment. Some patients require multiple intradermal injections into the face and scalp, and the way in which these patients process and experience pain differs, depending on the patient. Minimizing pain and discomfort during nonsurgical procedures is essential for patient satisfaction. In our experience, the use of acid citrate dextrose-A (ACD-A) as an anticoagulant caused more patient discomfort than did sodium citrate (Na-citrate) among patients who underwent facial rejuvenation with PRP. The aim of the present study was to evaluate patient-related discomfort in PRP sessions using two different anticoagulants. MATERIALS AND METHODS This clinical trial included 10 patients who received facial PRP injections for facial rejuvenation and 10 patients who received PRP injections in their scalps for hair loss. On the application area, half the surface was treated with Na-citrate PRP injections, and the other half was treated with the same amount of ACD-A PRP injections. Neither the doctors who applied the treatment nor the patients were given information about which anticoagulant was used in each area. Immediately after the procedure, the patients were asked to score their pain on each side of the application area on a scale of 1-10 using a visual analog scale (VAS). RESULTS PRP injections using Na-citrate as an anticoagulant caused less discomfort on both the face and scalp as compared with that of ACD-A. The outcome was statistically significant. CONCLUSION Anticoagulants used in PRP preparation affected patients' pain perceptions during the injections. The sensation of pain with PRP prepared with Na-citrate as an anticoagulant was lower than that of PRP prepared with ACD-A. Further studies are required to evaluate the correlation between anticoagulants used for PRP preparation and pain feelings during injections. LEVEL OF EVIDENCE III This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.
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Cortese L, Christopherson PW, Pelagalli A. Platelet Function and Therapeutic Applications in Dogs: Current Status and Future Prospects. Animals (Basel) 2020; 10:E201. [PMID: 31991713 PMCID: PMC7071006 DOI: 10.3390/ani10020201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 11/16/2022] Open
Abstract
Significant progress has been made in the functional characterization of canine platelets in the last two decades. The role of canine platelets in hemostasis includes their adhesion to the subendothelium, activation, and aggregation, leading to primary clot formation at the site of injury. Studies on canine platelet function and advancements in laboratory testing have improved the diagnosis and understanding of platelet-related disorders as well as the knowledge of the mechanisms behind these diseases. This review focuses on the most recent discoveries in canine platelet structure, function, and disorders; and discusses the efficacy of various tests in the diagnosis of platelet-related disorders. With the relatively recent discovery of angiogenetic and reparative effects of growth factors found in platelets, this review also summarizes the use of canine platelet-rich plasma (PRP) alone or in association with stem cells in regenerative therapy. The characterization of proteomic and lipidomic profiles and development of platelet gene therapy in veterinary species are areas of future study with potential for major therapeutic benefits.
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Affiliation(s)
- Laura Cortese
- Department of Veterinary Medicine and Animal Productions, Division of Internal Medicine, University of Naples Federico II, Via Delpino, 1, 80137 Naples, Italy;
| | - Pete W. Christopherson
- Department of Pathobiology, Auburn University College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA;
| | - Alessandra Pelagalli
- Department of Advanced Biomedical Sciences, University of Naples “Federico II”, 80131 Naples, Italy
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Naples, Italy
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A Novel and Convenient Method for the Preparation and Activation of PRP without Any Additives: Temperature Controlled PRP. BIOMED RESEARCH INTERNATIONAL 2018; 2018:1761865. [PMID: 29862255 PMCID: PMC5971324 DOI: 10.1155/2018/1761865] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 02/26/2018] [Indexed: 12/16/2022]
Abstract
Platelet rich plasma (PRP) is a concentrate of autologous platelets which contain enrichment growth factors (GFs). However, the addition of exogenous anticoagulant and procoagulant may result in clinical side effects and raise the price of PRP. Herein, we report a novel method named temperature controlled PRP (t-PRP), in which exogenous additives are dispensable in the preparation and activation process. Human blood samples were processed by a two-step centrifugation process under hypothermic conditions (4°C) to obtain t-PRP and rewarming up to 37°C to activate t-PRP. Contemporary PRP (c-PRP) was processed as the control. t-PRP showed a physiological pH value between 7.46 and 7.48 and up to 6.58 ± 0.45-fold significantly higher platelet concentration than that of whole blood compared with c-PRP (4.06-fold) in the preparation process. Meanwhile, t-PRP also maintained a stable GF level between plasma and PRP. After activation, t-PRP demonstrated natural fiber scaffolding, which trapped more platelet and GFs, and exhibited a slow release and degradation rate of GFs. In addition, t-PRP exhibited the function of promoting wound healing. t-PRP is a novel and convenient method for the preparation and activation of PRP without any additives. Compared to c-PRP, t-PRP reflects more physiologic characteristics while maintaining high quality.
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Flores RS, Boudreaux MK, Vasquez B, Bristow P, Aronson LR, Santoro-Beer K, Callan MB. Heterozygosity for P2Y12 receptor gene mutation associated with postoperative hemorrhage in a Greater Swiss Mountain dog. Vet Clin Pathol 2017; 46:569-574. [PMID: 28800150 DOI: 10.1111/vcp.12533] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A 3-year-old, female Greater Swiss Mountain dog developed a hemoperitoneum following an exploratory laparotomy and ovariohysterectomy. Platelet count, PT, APTT, and plasma von Willebrand factor antigen concentration were within RIs. A buccal mucosal bleeding time (BMBT) was prolonged. Given the probability of a hereditary thrombopathia, the dog was administered desmopressin, fresh platelet transfusions, and aminocaproic acid to control hemorrhage. Subsequently, DNA testing for the P2Y12 receptor gene mutation identified the dog as being a heterozygote (carrier). Further platelet function testing was performed following complete recovery. Results of a repeat BMBT and a point-of-care screening test using the Platelet Function Analyzer-100 (collagen/adenosine-diphosphate [ADP] test cartridge) were within RIs. Flow cytometric studies demonstrated a marked reduction in fibrinogen binding to the dog's platelets in response to ADP - adenosine diphosphate activation. Likewise, turbidimetric aggregometry revealed a complete absence of platelet aggregation in response to ADP. However, there were a normal aggregation response to the platelet agonist convulxin and a mild reduction in amplitude in response to γ-thrombin. This is the first report of a dog heterozygous for the P2Y12 receptor gene mutation exhibiting a bleeding tendency and having evidence of impaired platelet function in vitro in response to ADP activation. Given that the mutant allele for the P2Y12 thrombopathia appears to be widespread in the Greater Swiss Mountain dog breed, veterinarians need to be aware that both homozygotes and heterozygotes for this platelet receptor mutation are at risk of developing life-threatening bleeding following trauma or surgery.
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Affiliation(s)
- Rebecca S Flores
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Mary K Boudreaux
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL, USA
| | - Barbara Vasquez
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Poppy Bristow
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Lillian R Aronson
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Kari Santoro-Beer
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Mary Beth Callan
- Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Krogh TP, Ellingsen T, Christensen R, Jensen P, Fredberg U. Ultrasound-Guided Injection Therapy of Achilles Tendinopathy With Platelet-Rich Plasma or Saline: A Randomized, Blinded, Placebo-Controlled Trial. Am J Sports Med 2016; 44:1990-7. [PMID: 27257167 DOI: 10.1177/0363546516647958] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Achilles tendinopathy (AT) is a common and difficult to treat musculoskeletal disorder. PURPOSE To examine whether 1 injection of platelet-rich plasma (PRP) would improve outcomes more effectively than placebo (saline) after 3 months in patients with AT. STUDY DESIGN Randomized controlled trial; Level of evidence, 1. METHODS A total of 24 patients with chronic AT (median disease duration, 33 months) were randomized (1:1) to receive either a blinded injection of PRP (n = 12) or saline (n = 12). The primary endpoint was improvement in Victorian Institute of Sports Assessment-Achilles (VISA-A) score at 3 months. Secondary outcomes were pain at rest, pain while walking, pain when tendon was squeezed, ultrasonographic changes in tendon thickness, and color Doppler activity. Patients were informed that they could drop out after 3 months if they were dissatisfied with the treatment. RESULTS After 3 months, all 24 patients were reassessed (no dropouts). No difference between the PRP and the saline group could be observed with regard to the primary outcome (VISA-A score: mean difference [MD], -1.3; 95% CI, -17.8 to 15.2; P = .868). Secondary outcomes were pain at rest (MD, 1.6; 95% CI, -0.5 to 3.7; P = .137), pain while walking (MD, 0.8; 95% CI, -1.8 to 3.3; P = .544), pain when tendon was squeezed (MD, 0.3; 95% CI, -0.2 to 0.9; P = .208), color Doppler activity (MD, 0.3; 95% CI, -0.2 to 0.8; P = .260), and tendon thickness (MD, 0.8 mm; 95% CI, 0.1 to 1.6 mm; P = .030). After the 3-month follow-up, a large dropout was observed: 75% of patients in the PRP group and 33% in the saline group. CONCLUSION PRP injection did not result in an improved VISA-A score over a 3-month period in patients with chronic AT compared with placebo. The only secondary outcome demonstrating a statistically significant difference between the groups was change in tendon thickness; this difference indicates that a PRP injection could increase tendon thickness compared with saline injection. The conclusions are limited to the 3 months after treatment owing to the large dropout rate.
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Affiliation(s)
- Thøger P Krogh
- Diagnostic Centre, Regional Hospital Silkeborg, Silkeborg, Denmark
| | - Torkell Ellingsen
- Diagnostic Centre, Regional Hospital Silkeborg, Silkeborg, Denmark Department of Rheumatology, Odense University Hospital, Odense, Denmark
| | - Robin Christensen
- Musculoskeletal Statistics Unit, the Parker Institute, Department of Rheumatology, Bispebjerg and Frederiksberg Hospital, Frederiksberg, Denmark
| | - Pia Jensen
- Diagnostic Centre, Regional Hospital Silkeborg, Silkeborg, Denmark
| | - Ulrich Fredberg
- Diagnostic Centre, Regional Hospital Silkeborg, Silkeborg, Denmark Department of Rheumatology, Odense University Hospital, Odense, Denmark
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Oryan A, Alidadi S, Moshiri A. Platelet-rich plasma for bone healing and regeneration. Expert Opin Biol Ther 2015; 16:213-32. [DOI: 10.1517/14712598.2016.1118458] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Dhurat R, Sukesh M. Principles and Methods of Preparation of Platelet-Rich Plasma: A Review and Author's Perspective. J Cutan Aesthet Surg 2015; 7:189-97. [PMID: 25722595 PMCID: PMC4338460 DOI: 10.4103/0974-2077.150734] [Citation(s) in RCA: 477] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The utility of platelet-rich plasma (PRP) has spanned various fields of dermatology from chronic ulcer management to trichology and aesthetics, due to its role in wound healing. Though PRP is being used over a long time, there is still confusion over proper terminology to define, classify and describe the different variations of platelet concentrates. There is also a wide variation in the reported protocols for standardization and preparation of PRP, in addition to lack of accurate characterization of the tested products in most articles on the topic. Additionally, the high cost of commercially available PRP kits, precludes its use over a larger population. In this article, we review the principles and preparation methods of PRP based on available literature and place our perspective in standardizing a safe, simple protocol that can be followed to obtain an optimal consistent platelet yield.
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Affiliation(s)
- Rachita Dhurat
- Department of Dermatology, Lokmanya Tilak Municipal (LTM) Medical College and Hospital, Mumbai, Maharashtra, India
| | - Ms Sukesh
- Department of Dermatology, Lokmanya Tilak Municipal (LTM) Medical College and Hospital, Mumbai, Maharashtra, India
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Bilirubin, platelet activation and heart disease: a missing link to cardiovascular protection in Gilbert's syndrome? Atherosclerosis 2014; 239:73-84. [PMID: 25576848 DOI: 10.1016/j.atherosclerosis.2014.12.042] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 12/18/2014] [Accepted: 12/19/2014] [Indexed: 02/07/2023]
Abstract
Gilbert's syndrome (GS) is a relatively common condition, inducing a benign, non-hemolytic, unconjugated hyperbilirubinemia. Gilbert's Syndrome is associated with mutation in the Uridine Glucuronosyl Transferase 1A1 (UGT1A1) gene promoter, reducing UGT1A1 activity, which normally conjugates bilirubin allowing its elimination from the blood. Individuals with GS demonstrate mildly elevated plasma antioxidant capacity caused by elevated levels of unconjugated bilirubin (UCB), reduced thiols and glutathione. Interestingly, the development of, and risk of mortality from, cardiovascular disease is remarkably reduced in GS individuals. An explanation for this protection may be explained by bilirubin's ability to inhibit multiple processes that induce platelet hyper-reactivity and thrombosis, thus far under-appreciated in the literature. Reactive oxygen species are produced continuously via metabolic processes and have the potential to oxidatively modify proteins and lipids within cell membranes, which may encourage the development of thrombosis and CVDs. Oxidative stress induced platelet hyper-reactivity significantly increases the risk of thrombosis, which can potentially lead to tissue infarction. Here, we discuss the possible mechanisms by which increased antioxidant status might influence platelet function and link this to cardiovascular protection in GS. In summary, this is the first article to discuss the possible role of bilirubin as an anti-thrombotic agent, which inhibits platelet activation and potentially, organ infarction, which could contribute to the reduced mortality rate in mildly hyperbilirbinemic individuals.
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Wilson JJ, Rabago DP, Lee KS. Platelet-rich plasma treatment for lateral epicondylitis: letter to the editor. Am J Sports Med 2013; 41:NP33-4. [PMID: 23818440 DOI: 10.1177/0363546513493767] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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17
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Wiinberg B, Jessen LR, Tarnow I, Kristensen AT. Diagnosis and treatment of platelet hyperactivity in relation to thrombosis in dogs and cats. J Vet Emerg Crit Care (San Antonio) 2012; 22:42-58. [DOI: 10.1111/j.1476-4431.2011.00708.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Bo Wiinberg
- From the Department of Small Animal Clinical Sciences; Faculty of Life Sciences; University of Copenhagen; DK-1810 Frederiksberg; Denmark
| | - Lisbeth R. Jessen
- From the Department of Small Animal Clinical Sciences; Faculty of Life Sciences; University of Copenhagen; DK-1810 Frederiksberg; Denmark
| | - Inge Tarnow
- Health & Nutrition Division; Chr. Hansen A/S; DK-2970 Hørsholm; Denmark
| | - Annemarie T. Kristensen
- From the Department of Small Animal Clinical Sciences; Faculty of Life Sciences; University of Copenhagen; DK-1810 Frederiksberg; Denmark
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Guillaumin J, Jandrey KE, Norris JW, Tablin F. Analysis of a commercial dimethyl-sulfoxide-stabilized frozen canine platelet concentrate by turbidimetric aggregometry. J Vet Emerg Crit Care (San Antonio) 2010; 20:571-7. [DOI: 10.1111/j.1476-4431.2010.00580.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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