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Cantero MM. Not all platelet-rich plasma are created equal. Curr Opin Obstet Gynecol 2024; 36:118-123. [PMID: 38324593 DOI: 10.1097/gco.0000000000000944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
PURPOSE OF REVIEW This review aims to elucidate potential variations in clinical outcomes resulting from the use of different types of platelet-rich plasma (PRPs) in reproductive medicine. It seeks to explore the reasons behind the diverse results reported in various studies and assess the general features distinguishing different PRP formulations. RECENT FINDINGS PRPs have found applications across diverse medical fields, generating controversy due to the variability in outcomes. The field of reproductive medicine, despite its limited published studies, is encountering a similar challenge as it integrates these treatments. SUMMARY The multitude of PRP product brands in the market, coupled with 'home-made' PRPs, poses a significant barrier to establishing a common protocol for the preparation of standardized PRP products. This impediment hinders widespread adoption by clinicians, particularly in endometrial or ovarian treatments. Drawing from evidence in other medical disciplines, this review endeavors to compile essential characteristics that PRPs must possess, aiming to mitigate the impact of variables affecting results in forthcoming studies.
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Affiliation(s)
- Manuel Muñoz Cantero
- IVI Alicante, Centro de Excelencia en Rejuvenecimiento Ovárico, Avenida de Denia, Alicante, Spain
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2
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Anitua E, Zalduendo M, Tierno R, Alkhraisat MH. Plasma Rich in Growth Factors in Bone Regeneration: The Proximity to the Clot as a Differential Factor in Osteoblast Cell Behaviour. Dent J (Basel) 2024; 12:122. [PMID: 38786520 PMCID: PMC11119057 DOI: 10.3390/dj12050122] [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: 03/04/2024] [Revised: 04/12/2024] [Accepted: 04/19/2024] [Indexed: 05/25/2024] Open
Abstract
The osteogenic differentiation process, by which bone marrow mesenchymal stem cells and osteoprogenitors transform into osteoblasts, is regulated by several growth factors, cytokines, and hormones. Plasma Rich in Growth Factors (PRGF) is a blood-derived preparation consisting of a plethora of bioactive molecules, also susceptible to containing epigenetic factors such as ncRNAs and EVs, that stimulates tissue regeneration. The aim of this study was to investigate the effect of the PRGF clot formulation on osteogenic differentiation. Firstly, osteoblast cells were isolated and characterised. The proliferation of bone cells cultured onto PRGF clots or treated with PRGF supernatant was determined. Moreover, the gene expression of Runx2 (ID: 860), SP7 (ID: 121340), and ALPL (ID: 249) was analysed by one-step real-time quantitative polymerase chain reaction (RT-qPCR). Additionally, alkaline phosphatase (ALPL) activity determination was performed. The highest proliferative effect was achieved by the PRGF supernatant in all the study periods analysed. Concerning gene expression, the logRGE of Runx2 increased significantly in osteoblasts cultured with PRGF formulations compared with the control group, while that of SP7 increased significantly in osteoblasts grown on the PRGF clots. On the other hand, despite the fact that the PRGF supernatant induced ALPL up-regulation, significantly higher enzyme activity was detected for the PRGF clots in comparison with the supernatant formulation. According to our results, contact with the PRGF clot could promote a more advanced phase in the osteogenic process, associated to higher levels of ALPL activity. Furthermore, the PRGF clot releasate stimulated a higher proliferation rate in addition to reduced SP7 expression in the cells located at a distant ubication, leading to a less mature osteoblast stage. Thus, the spatial relationship between the PRGF clot and the osteoprogenitors cells could be a factor that influences regenerative outcomes.
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Affiliation(s)
- Eduardo Anitua
- BTI-Biotechnology Institute, 01007 Vitoria, Spain; (M.Z.); (R.T.); (M.H.A.)
- University Institute for Regenerative Medicine & Oral Implantology, UIRMI (UPV/EHU-Fundación Eduardo Anitua), 01007 Vitoria, Spain
| | - Mar Zalduendo
- BTI-Biotechnology Institute, 01007 Vitoria, Spain; (M.Z.); (R.T.); (M.H.A.)
- University Institute for Regenerative Medicine & Oral Implantology, UIRMI (UPV/EHU-Fundación Eduardo Anitua), 01007 Vitoria, Spain
| | - Roberto Tierno
- BTI-Biotechnology Institute, 01007 Vitoria, Spain; (M.Z.); (R.T.); (M.H.A.)
- University Institute for Regenerative Medicine & Oral Implantology, UIRMI (UPV/EHU-Fundación Eduardo Anitua), 01007 Vitoria, Spain
| | - Mohammad Hamdan Alkhraisat
- BTI-Biotechnology Institute, 01007 Vitoria, Spain; (M.Z.); (R.T.); (M.H.A.)
- University Institute for Regenerative Medicine & Oral Implantology, UIRMI (UPV/EHU-Fundación Eduardo Anitua), 01007 Vitoria, Spain
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Júnior JAG, Nóbrega F, Oliveira PG, Bergamo ET, Cadore U, Gomes MZDV, Kjellin P, Chaushu L, Bezerra F, Ghiraldini B, Scombatti de Souza S. Evaluation of Implant Surface Modification with Nanohydroxyapatite Associated with the Use of L-PRF: In Vivo Study in Rats. J Funct Biomater 2023; 14:370. [PMID: 37504865 PMCID: PMC10381410 DOI: 10.3390/jfb14070370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 05/17/2023] [Accepted: 07/10/2023] [Indexed: 07/29/2023] Open
Abstract
Leukocyte-platelet-rich fibrin (L-PRF) contains growth factors that stimulate bone regeneration. This study evaluated the bone repair in a tibia rat model around two implant surfaces in combination or not with L-PRF by assessing microtomographic and histomorphometric parameters. A total of 48 female rats were used in the study, in which 24 received implants with two types of surface treatments (dual acid etched-DAE or nanohydroxyapatite-nanoHA), and the other 24 received the same mini implants with L-PRF, which was collected by cardiac puncture, centrifugated, and inserted in the bone bed. The animals were euthanized 7 and 30 days after implant placement, and the retrieved samples were prepared for microtomographic and histomorphometric (bone-to-implant contact-BIC; and Bone Area Fraction Occupancy-BAFO) analyses. The adhesion of the nanoHA surface onto the implant surface was investigated by insertion and removal in simulated bone medium (Sawbones). The adhesion evaluation revealed that the loss of nanoHA after this procedure (as measured with SEM) from the implant surface was less than 1%. Overall, the nanoHA surface presented more bone in contact and in proximity to the implant, a higher bone surface/tissue volume fraction, a higher number of bone trabeculae, as well as trabecular separation relative to the DAE surface. Such results were more evident when the nanoHA surface was combined with L-PRF and after 30 days in vivo. The nanoHA surface presented higher BAFO when compared to DAE, with or without association with L-PRF. Therefore, implants with a nanoHA surface potentially benefit from the association to L-PRF.
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Affiliation(s)
- José Augusto Gabarra Júnior
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of Sao Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Fernando Nóbrega
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of Sao Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Paula Gabriela Oliveira
- Department of Periodontology, School of Dentistry, University Center of State of Para, Belem 66060-575, PA, Brazil
| | - Edmara Tatiely Bergamo
- Department of Periodontology and Prosthodontics, Bauru School of Dentistry, University of Sao Paulo, Bauru 17012-901, SP, Brazil
| | - Uislen Cadore
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of Sao Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | | | - Per Kjellin
- Promimic AB, AstraZeneca BioventureHub, 481 83 Mölndal, Sweden
| | - Liat Chaushu
- Department of Periodontology and Implant Dentistry, School of Dentistry, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Fabio Bezerra
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of Sao Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Bruna Ghiraldini
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of Sao Paulo, Ribeirão Preto 14040-904, SP, Brazil
| | - Sergio Scombatti de Souza
- Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of Sao Paulo, Ribeirão Preto 14040-904, SP, Brazil
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Bone-targeting delivery of platelet lysate exosomes ameliorates glucocorticoid-induced osteoporosis by enhancing bone-vessel coupling. J Nanobiotechnology 2022; 20:220. [PMID: 36310171 PMCID: PMC9620632 DOI: 10.1186/s12951-022-01400-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 03/26/2022] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Glucocorticoids (GCs) overuse is associated with decreased bone mass and osseous vasculature destruction, leading to severe osteoporosis. Platelet lysates (PL) as a pool of growth factors (GFs) were widely used in local bone repair by its potent pro-regeneration and pro-angiogenesis. However, it is still seldom applied for treating systemic osteopathia due to the lack of a suitable delivery strategy. The non-targeted distribution of GFs might cause tumorigenesis in other organs. RESULTS In this study, PL-derived exosomes (PL-exo) were isolated to enrich the platelet-derived GFs, followed by conjugating with alendronate (ALN) grafted PEGylated phospholipid (DSPE-PEG-ALN) to establish a bone-targeting PL-exo (PL-exo-ALN). The in vitro hydroxyapatite binding affinity and in vivo bone targeting aggregation of PL-exo were significantly enhanced after ALN modification. Besides directly modulating the osteogenic and angiogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) and endothelial progenitor cells (EPCs), respectively, PL-exo-ALN also facilitate their coupling under GCs' stimulation. Additionally, intravenous injection of PL-exo-ALN could successfully rescue GCs induced osteoporosis (GIOP) in vivo. CONCLUSIONS PL-exo-ALN may be utilized as a novel nanoplatform for precise infusion of GFs to bone sites and exerts promising therapeutic potential for GIOP.
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Koyuncu A, Koç S, Akdere ÖE, Çakmak AS, Gümüşderelioğlu M. Investigation of the synergistic effect of platelet-rich plasma and polychromatic light on human dermal fibroblasts seeded chitosan/gelatin scaffolds for wound healing. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 232:112476. [PMID: 35633608 DOI: 10.1016/j.jphotobiol.2022.112476] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 04/30/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Conventional wound healing treatments are insufficient for chronic wounds caused by factors such as senescence of fibroblasts, reduced growth factor synthesis, and poor angiogenesis. Recently, tissue engineering approaches have been investigated to develop effective therapies. In this study, a biochemical/biophysical stimulant-based 3D system was developed for the healing of chronic wounds. In this direction, genipin crosslinked chitosan (CHT)/gelatin (GEL) scaffolds were fabricated by freeze-drying and loaded with platelet-rich plasma (PRP). The scaffolds were seeded with human dermal fibroblasts and then, polychromatic light in near infrared region (NIR) was applied to the scaffolds for activating the platelets and stimulating the fibroblasts (photoactivation, PAC). Thus, fibroblasts were stimulated both chemically and physically by PRP and light, respectively. Cell migration, proliferation, morphology, gene expressions and reactive oxygen species (ROS) activity were evaluated in-vitro. Laminin and collagen 4 expressions that are important for extracellular matrix (ECM) formation, and PDGF (Platelet-derived growth factor) and VEGF (Vascular endothelial growth factor) expressions that are important for vascularization significantly increased in the presence of both PRP and light. Besides, PRP and light improved cell migration in 3D core-and shell model synergistically. Hydrogen peroxide content decreased in both PRP and light, indicating inhibition of ROS production. It was concluded that the stimulation of platelets with light in the NIR has a great potential to use for both platelets activation and stimulation of fibroblasts. As a result, an effective therapy can be developed for chronic wounds by using scaffold-based 3D systems together with PRP and photostimulation.
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Affiliation(s)
- Ayfer Koyuncu
- Hacettepe University, Graduate School of Science and Engineering, Bioengineering Department, Beytepe, Ankara, Turkey
| | - Sena Koç
- Hacettepe University, Chemical Engineering Department, Beytepe, Ankara, Turkey
| | - Özge Ekin Akdere
- Hacettepe University, Graduate School of Science and Engineering, Bioengineering Department, Beytepe, Ankara, Turkey
| | - Anıl Sera Çakmak
- Hacettepe University, Chemical Engineering Department, Beytepe, Ankara, Turkey
| | - Menemşe Gümüşderelioğlu
- Hacettepe University, Graduate School of Science and Engineering, Bioengineering Department, Beytepe, Ankara, Turkey; Hacettepe University, Chemical Engineering Department, Beytepe, Ankara, Turkey.
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OPTIMIZING A PLATELET-RICH PLASMA CONCENTRATION PROTOCOL FOR SOUTH AMERICAN SEA LIONS ( OTARIA FLAVESCENS). J Zoo Wildl Med 2021; 52:956-965. [PMID: 34687512 DOI: 10.1638/2020-0204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2021] [Indexed: 11/21/2022] Open
Abstract
Accelerated healing in wild or captive South American sea lions (Otaria flavescens) is a key tool to help minimize infection and complications associated with open wounds, dental disease, and ocular pathology. Platelet-rich plasma (PRP) is an autogenous source for growth factors based on platelet concentration, which can be obtained by centrifuging whole blood collected in sodium citrate anticoagulant. Currently, there are well-defined PRP concentration protocols for humans and most domestic companion animal species. However, there is no clear centrifugation protocol for obtaining PRP in most marine mammal species. This study aimed to optimize the platelet concentration protocol based on whole blood centrifugation using speeds ranging from 500 to 5,000 rpm and times ranging from 3 to 6 min. Blood was drawn from seven adult South American sea lions, placed into 1-ml sodium citrate tubes, and centrifuged following 12 different centrifugation protocols. PRP was designated as the lower third fraction of the centrifuged plasma. Platelet counts were performed using flow cytometry and statistical analysis was carried out to establish a well-defined protocol for efficient PRP production. Transmission electron microscopy (TEM) analysis was performed to evaluate possible platelet degranulation during the different centrifugation protocols and measure platelet areas. Maximum concentration of platelets in PRP was 4.73-fold higher than the number of platelets in equal volume of whole blood, and significant differences in the concentrations obtained were found between the 12 centrifugation protocols evaluated using different speed and time combinations. The best one-step centrifugation protocol resulted from using 900-rpm speed for 3 min. The highest-fold increase was achieved using a two-step centrifugation protocol, which combined the most efficient one-step centrifugation protocol (900 rpm, 3 min) with a second centrifugation using 2,000-rpm speed for 6 min. TEM analysis confirmed that platelets were complete and maintained integrity after the proposed protocol.
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Toosi S, Behravan J. Osteogenesis and bone remodeling: A focus on growth factors and bioactive peptides. Biofactors 2020; 46:326-340. [PMID: 31854489 DOI: 10.1002/biof.1598] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 11/30/2019] [Indexed: 12/14/2022]
Abstract
Bone is one of the most frequently transplanted tissues. The bone structure and its physiological function and stem cells biology were known to be closely related to each other for many years. Bone is considered a home to the well-known systems of postnatal mesenchymal stem cells (MSCs). These bone resident MSCs provide a range of growth factors (GF) and cytokines to support cell growth following injury. These GFs include a group of proteins and peptides produced by different cells which are regulators of important cell functions such as division, migration, and differentiation. GF signaling controls the formation and development of the MSCs condensation and plays a critical role in regulating osteogenesis, chondrogenesis, and bone/mineral homeostasis. Thus, a combination of both MSCs and GFs receives high expectations in regenerative medicine, particularly in bone repair applications. It is known that the delivery of exogenous GFs to the non-union bone fracture site remarkably improves healing results. Here we present updated information on bone tissue engineering with a specific focus on GF characteristics and their application in cellular functions and tissue healing. Moreover, the interrelation of GFs with the damaged bone microenvironment and their mechanistic functions are discussed.
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Affiliation(s)
- Shirin Toosi
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical, Mashhad, Iran
- Food and Drug Administration, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Javad Behravan
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical, Mashhad, Iran
- School of Pharmacy, University of Waterloo, Waterloo, Ontario, Canada
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Swendseid B, Vimawala S, Ortlip T, Richa T, Schmidt N, Walter A, Heffelfinger R, Luginbuhl A. Platelet-Rich Plasma Enhances Distal Flap Viability and Underlying Vascularity in a Radiated Rotational Flap Rodent Model. Facial Plast Surg Aesthet Med 2020; 22:181-187. [PMID: 32286865 DOI: 10.1089/fpsam.2019.0018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Importance: Autologous platelet-rich plasma (PRP) has received widespread attention due to its physiologic healing properties, augmenting the body's natural healing process through platelet activation and release of growth factors. The effects of PRP on radiated tissue have been inadequately studied in vivo. Objective: To determine whether PRP can be used to improve viability of radiated tissue subjected to a clinically meaningful stressor, in this case a rotational skin flap. Design, Setting, Participants: This is a prospective trial using a radiated rat abdominal rotational flap model in the laboratory. Male Sprague-Daley rats were used in this study. Harvested PRP or saline control was injected into rotational flaps immediately after surgery. Progression of necrosis was documented with photo analysis. After 1 week, animals were sacrificed and flap tissue was stained and analyzed for presence of vascular tissue. Intervention: PRP versus control injection into radiated skin tissue. Main Outcomes and Measures: Percentage necrosis of rotational flap and number of vascular channels stained with CD31 present in flap tissue. Results: PRP administration helped rescue the distal flap from necrosis, achieving viability similar to nonradiated controls. Superficial vascularity was similarly increased fivefold in radiated tissue if PRP was given postoperatively, mirroring the vascular density of nonradiated tissue. Conclusions and Relevance: PRP may enhance distal rotational flap viability after radiation, possibly by protecting superficial vessels from tissue necrosis when administered at the time of surgery.
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Affiliation(s)
- Brian Swendseid
- Department of Otolaryngology-Head and Neck Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Swar Vimawala
- Department of Otolaryngology-Head and Neck Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Tim Ortlip
- Otolaryngology, Washington Township Medical Foundation, Fremont, California, USA
| | - Tony Richa
- Department of Otolaryngology-Head and Neck Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Nicholas Schmidt
- Drexel University School of Medicine, Philadelphia, Pennsylvania, USA
| | - Avery Walter
- Department of Otolaryngology-Head and Neck Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Ryan Heffelfinger
- Department of Otolaryngology-Head and Neck Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Adam Luginbuhl
- Department of Otolaryngology-Head and Neck Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
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Nakornnoi T, Leethanakul C, Samruajbenjakun B. Effects of Leukocyte-Platelet-Rich Plasma on the Alveolar Bone Changes During Orthodontic Tooth Movement in Rabbits: A Micro-CT Study. JOURNAL OF INDIAN ORTHODONTIC SOCIETY 2019. [DOI: 10.1177/0301574219872608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective: To investigate the effects of leukocyte-platelet-rich plasma (L-PRP) on the alveolar bone changes at the compression and tension sides during orthodontic tooth movement. Materials and Methods: Around 20 New Zealand white rabbits were used in a split-mouth design. The maxillary first premolar was moved mesially with a nickel-titanium closed-coil spring. One side of the maxilla was randomly injected with L-PRP, while the contralateral side served as the control which received normal saline. The alveolar bone adjacent to the maxillary first premolar was scanned using microcomputed tomography at days 0, 7, 14, and 28. Microstructural parameters including bone volume fraction, trabecular thickness, and trabecular separation of alveolar bone were assessed on the compression and tension sides of the maxillary first premolar. Results: Compared between the groups, the L-PPR group showed a significantly decreased bone volume fraction on the compression side on days 7 and 14 but significantly increased bone volume fraction on the tension side on day 14. However, there were no statistically significant differences in the parameters of trabecular thickness and trabecular separation. Conclusion: Local administration of L-PRP may promote bone resorption on the compression side and bone formation on the tension side at the initial stage of orthodontic tooth movement.
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Affiliation(s)
- Theerasak Nakornnoi
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand
| | - Chidchanok Leethanakul
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand
| | - Bancha Samruajbenjakun
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Songkhla, Thailand
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Effectiveness of Allogeneic Platelet-Rich Fibrin on Second-Intention Wound Healing of Experimental Skin Defect in Distal Limb in Donkeys (Equus asinus). J Equine Vet Sci 2019. [DOI: 10.1016/j.jevs.2018.12.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Does Periosteal Graft Combined With Platelet-Rich Plasma Enhance the Healing of Bone Defect? J Craniofac Surg 2018; 29:1072-1080. [DOI: 10.1097/scs.0000000000004229] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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12
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Reconstruction of Craniomaxillofacial Bone Defects Using Tissue-Engineering Strategies with Injectable and Non-Injectable Scaffolds. J Funct Biomater 2017; 8:jfb8040049. [PMID: 29156629 PMCID: PMC5748556 DOI: 10.3390/jfb8040049] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/09/2017] [Accepted: 11/14/2017] [Indexed: 02/06/2023] Open
Abstract
Engineering craniofacial bone tissues is challenging due to their complex structures. Current standard autografts and allografts have many drawbacks for craniofacial bone tissue reconstruction; including donor site morbidity and the ability to reinstate the aesthetic characteristics of the host tissue. To overcome these problems; tissue engineering and regenerative medicine strategies have been developed as a potential way to reconstruct damaged bone tissue. Different types of new biomaterials; including natural polymers; synthetic polymers and bioceramics; have emerged to treat these damaged craniofacial bone tissues in the form of injectable and non-injectable scaffolds; which are examined in this review. Injectable scaffolds can be considered a better approach to craniofacial tissue engineering as they can be inserted with minimally invasive surgery; thus protecting the aesthetic characteristics. In this review; we also focus on recent research innovations with different types of stem-cell sources harvested from oral tissue and growth factors used to develop craniofacial bone tissue-engineering strategies.
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Qian Y, Han Q, Chen W, Song J, Zhao X, Ouyang Y, Yuan W, Fan C. Platelet-Rich Plasma Derived Growth Factors Contribute to Stem Cell Differentiation in Musculoskeletal Regeneration. Front Chem 2017; 5:89. [PMID: 29164105 PMCID: PMC5671651 DOI: 10.3389/fchem.2017.00089] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 10/16/2017] [Indexed: 12/24/2022] Open
Abstract
Stem cell treatment and platelet-rich plasma (PRP) therapy are two significant issues in regenerative medicine. Stem cells such as bone marrow mesenchymal stem cells, adipose-derived stem cells and periodontal ligament stem cells can be successfully applied in the field of tissue regeneration. PRP, a natural product isolated from whole blood, can secrete multiple growth factors (GFs) for regulating physiological activities. These GFs can stimulate proliferation and differentiation of different stem cells in injury models. Therefore, combination of both agents receives wide expectations in regenerative medicine, especially in bone, cartilage and tendon repair. In this review, we thoroughly discussed the interaction and underlying mechanisms of PRP derived GFs with stem cells, and assessed their functions in cell differentiation for musculoskeletal regeneration.
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Affiliation(s)
- Yun Qian
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Sixth People's Hospital East Campus, Shanghai University of Medicine and Health, Shanghai, China
| | - Qixin Han
- Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Wei Chen
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Sixth People's Hospital East Campus, Shanghai University of Medicine and Health, Shanghai, China
| | - Jialin Song
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Sixth People's Hospital East Campus, Shanghai University of Medicine and Health, Shanghai, China
| | - Xiaotian Zhao
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Yuanming Ouyang
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Sixth People's Hospital East Campus, Shanghai University of Medicine and Health, Shanghai, China
| | - Weien Yuan
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Cunyi Fan
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Clinical Comparison of the Subepithelial Connective Tissue versus Platelet-Rich Fibrin for the Multiple Gingival Recession Coverage on Anterior Teeth Using the Tunneling Technique. Case Rep Dent 2017; 2017:4949710. [PMID: 28695021 PMCID: PMC5485303 DOI: 10.1155/2017/4949710] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 05/04/2017] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to evaluate and compare, clinically, the efficiency of the subepithelial connective tissue graft (SCTG) and platelet-rich fibrin (L-PRF) using the tunnel technique to cover the multiple gingival recessions on anterior teeth, in the same patient. Within the limits of this study, we conclude that both SCTG and L-PRF proved to be reliable options for the treatment of gingival recessions, efficiently supporting the biological and aesthetic demand, stimulating the periodontal tissues' health, and bringing reliable and highly predictable results.
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Yamakawa J, Hashimoto J, Takano M, Takagi M. The Bone Regeneration Using Bone Marrow Stromal Cells with Moderate Concentration Platelet-Rich Plasma in Femoral Segmental Defect of Rats. Open Orthop J 2017; 11:1-11. [PMID: 28217215 PMCID: PMC5301304 DOI: 10.2174/1874325001711010001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Revised: 12/09/2016] [Accepted: 12/13/2016] [Indexed: 11/22/2022] Open
Abstract
Background: Platelet-rich plasma (PRP) can provide an assortment of growth factors, but how PRP effects bone regeneration is still unknown. The aim of the study was to explore an optimal method of using PRP and bone marrow stromal cells (BMSCs). Methods: An in vitro experiment was first conducted to determine an appropriate quantity of PRP. BMSCs were cultured with PRP of different concentrations to assess cell proliferation and osteogenic differentiation. Following the in vitro study, a rat femoral segmental defect model was used. Five collagen mixtures consisting of different concentrations of PRP and BMSCs were prepared as follows, i) BMSCs and PRP (platelet 20 x 104/µl), ii) BMSCs and PRP (platelet 100 x 104/µl), iii) BMSCs and PRP (platelet 500 x 104/µl), iv) BMSCs, and v) PRP group (platelet 100 x 104/µl), were used to fill defect. New bone formation was evaluated by soft X-ray and histologic analyses were performed at 2, 4, 6 and 8 weeks postoperatively. Results: The cell proliferation increased PRP concentration-dependently. Cellular alkaline phosphatase activity was higher in moderate concentration than high or low concentration group’s in vitro study. In vivo study, the bone fill percentage of newly formed bone in BMSCs and PRP (platelet 100 x 104/µl) was 46.9% at 8 weeks and increased significantly compared with other groups. Conclusion: BMSCs with moderate level of PRP significantly enhanced bone formation in comparison with BMSCs or PRP transplant in a rat femoral defect model.
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Affiliation(s)
- Junichi Yamakawa
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Junichi Hashimoto
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Mitsuo Takano
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Michiaki Takagi
- Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, Yamagata, Japan
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Cohn CS, Lockhart E, McCullough JJ. The use of autologous platelet-rich plasma in the orthopedic setting. Transfusion 2015; 55:1812-20. [PMID: 25646697 DOI: 10.1111/trf.13005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 11/26/2014] [Accepted: 11/27/2014] [Indexed: 12/20/2022]
Abstract
BACKGROUND Autologous platelet-rich plasma (aPRP) is widely used with orthopedic patients to help treat injuries to tendons, cartilage, ligaments, and muscle. A comprehensive review of the literature was conducted to evaluate aPRP's efficacy and compare available methods. In addition, the production and administration of aPRP were explored. STUDY DESIGN AND METHODS A literature search was performed. Randomized controlled clinical trials (RCTs) in orthopedic procedures on adult patients were included and assessed for methodologic quality. The main outcomes were pain relief, increase in function, structural integrity, and "healing" based on various validated scales. RESULTS Twelve RCTs and one controlled cohort were included (four lateral epicondylitis, two chronic Achilles tendinopathy, two anterior cruciate ligament injury, and five rotator cuff injuries). Four trials reported some benefit from aPRP versus controls while eight trials found no benefit from aPRP applications versus control. One study had too many patients withdraw from the control arm for acceptable data interpretation. All protocols used a different aPRP formulation or method of delivery or application. CONCLUSIONS Despite its popularity, there are no standardized criteria that define aPRP. Different techniques yield wide variability in terms of platelet count and concentration. These variations make it difficult to compare clinical trials that use aPRP or draw conclusions concerning its clinical efficacy in orthopedic procedures. Blood bankers have experience in the production of standardized blood components. This expertise may be used to develop and implement protocols for the production and administration of aPRP, as well as quality control measures.
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Affiliation(s)
- Claudia S Cohn
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis, Minnesota
| | - Evelyn Lockhart
- Department of Pathology, Duke University Medical School, Durham, North Carolina
| | - J Jeffrey McCullough
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis, Minnesota
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Liu X, Wang P, Chen W, Weir MD, Bao C, Xu HHK. Human embryonic stem cells and macroporous calcium phosphate construct for bone regeneration in cranial defects in rats. Acta Biomater 2014; 10:4484-93. [PMID: 24972090 DOI: 10.1016/j.actbio.2014.06.027] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 06/09/2014] [Accepted: 06/17/2014] [Indexed: 02/05/2023]
Abstract
Human embryonic stem cells (hESCs) are an exciting cell source as they offer an unlimited supply of cells that can differentiate into all cell types for regenerative medicine applications. To date, there has been no report on hESCs with calcium phosphate cement (CPC) scaffolds for bone regeneration in vivo. The objectives of this study were to: (i) investigate hESCs for bone regeneration in vivo in critical-sized cranial defects in rats; and (ii) determine the effects of cell seeding and platelets in macroporous CPC on new bone and blood vessel formation. hESCs were cultured to yield mesenchymal stem cells (MSCs), which underwent osteogenic differentiation. Four groups were tested in rats: (i) CPC control without cells; (ii) CPC with hESC-derived MSCs (CPC+hESC-MSC); (iii) CPC with hESC-MSCs and 30% human platelet concentrate (hPC) (CPC+hESC-MSC+30% hPC); and (iv) CPC+hESC-MSC+50% hPC. In vitro, MSCs were derived from embryoid bodies of hESCs. Cells on CPC were differentiated into the osteogenic lineage, with highly elevated alkaline phosphatase and osteocalcin expressions, as well as mineralization. At 12weeks in vivo, the groups with hESC-MSCs and hPC had three times as much new bone as, and twice the blood vessel density of, the CPC control. The new bone in the defects contained osteocytes and blood vessels, and the new bone front was lined with osteoblasts. The group with 30% hPC and hESC-MSCs had a blood vessel density that was 49% greater than the hESC-MSC group without hPC, likely due to the various growth factors in the platelets enhancing both new bone and blood vessel formation. In conclusion, hESCs are promising for bone tissue engineering, and hPC can enhance new bone and blood vessel formation. Macroporous CPC with hESC-MSCs and hPC may be useful for bone regeneration in craniofacial and orthopedic applications.
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Affiliation(s)
- Xian Liu
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China
| | - Ping Wang
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China
| | - Wenchuan Chen
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA; State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China
| | - Michael D Weir
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Chongyun Bao
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041, China.
| | - Hockin H K Xu
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA; Mechanical Engineering Department, University of Maryland Baltimore County, Baltimore, MD 21250, USA; Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; University of Maryland Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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Griffeth RJ, García-Párraga D, Mellado-López M, Crespo-Picazo JL, Soriano-Navarro M, Martinez-Romero A, Moreno-Manzano V. Platelet-rich plasma and adipose-derived mesenchymal stem cells for regenerative medicine-associated treatments in bottlenose dolphins (Tursiops truncatus). PLoS One 2014; 9:e108439. [PMID: 25251412 PMCID: PMC4177220 DOI: 10.1371/journal.pone.0108439] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 08/29/2014] [Indexed: 01/21/2023] Open
Abstract
Dolphins exhibit an extraordinary capacity to heal deep soft tissue injuries. Nevertheless, accelerated wound healing in wild or captive dolphins would minimize infection and other side effects associated with open wounds in marine animals. Here, we propose the use of a biological-based therapy for wound healing in dolphins by the application of platelet-rich plasma (PRP). Blood samples were collected from 9 different dolphins and a specific and simple protocol which concentrates platelets greater than two times that of whole blood was developed. As opposed to a commonly employed human protocol for PRP preparation, a single centrifugation for 3 minutes at 900 rpm resulted in the best condition for the concentration of dolphin platelets. By FACS analysis, dolphin platelets showed reactivity to platelet cell-surface marker CD41. Analysis by electron microscopy revealed that dolphin platelets were larger in size than human platelets. These findings may explain the need to reduce the duration and speed of centrifugation of whole blood from dolphins to obtain a 2-fold increase and maintain proper morphology of the platelets. For the first time, levels of several growth factors from activated dolphin platelets were quantified. Compared to humans, concentrations of PDGF-BB were not different, while TGFβ and VEGF-A were significantly lower in dolphins. Additionally, adipose tissue was obtained from cadaveric dolphins found along the Spanish Mediterranean coast, and adipose-derived mesenchymal stem cells (ASCs) were successfully isolated, amplified, and characterized. When dolphin ASCs were treated with 2.5 or 5% dolphin PRP they exhibited significant increased proliferation and improved phagocytotic activity, indicating that in culture, PRP may improve the regenerative capacity of ASCs. Taken together, we show an effective and well-defined protocol for efficient PRP isolation. This protocol alone or in combination with ASCs, may constitute the basis of a biological treatment for wound-healing and tissue regeneration in dolphins.
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Affiliation(s)
- Richard J. Griffeth
- Centro de Investigación Príncipe Felipe, Tissue and Neuronal Regeneration Lab, Valencia, Spain
| | | | - Maravillas Mellado-López
- Centro de Investigación Príncipe Felipe, Tissue and Neuronal Regeneration Lab, Valencia, Spain
- FactorStem, Ltd. Valencia, Spain
| | | | | | | | - Victoria Moreno-Manzano
- Centro de Investigación Príncipe Felipe, Tissue and Neuronal Regeneration Lab, Valencia, Spain
- FactorStem, Ltd. Valencia, Spain
- * E-mail:
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Delos D, Leineweber MJ, Chaudhury S, Alzoobaee S, Gao Y, Rodeo SA. The effect of platelet-rich plasma on muscle contusion healing in a rat model. Am J Sports Med 2014; 42:2067-74. [PMID: 25056987 DOI: 10.1177/0363546514540272] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Current therapy for muscle contusions is usually limited to nonsteroidal anti-inflammatory drugs and/or use of the RICE principle (rest, ice, compression, elevation); thus, other forms of treatment that can potentially accelerate the rate of healing are desirable. HYPOTHESES A local injection of platelet-rich plasma (PRP) would lead to accelerated healing rates compared with controls; also, delayed administration of PRP would lead to a blunted response compared with immediate treatment. STUDY DESIGN Controlled laboratory study. METHODS Forty-six male Lewis rats each underwent a single blunt, nonpenetrating impact to the gastrocnemius muscle via a drop-mass technique and subsequently received either a single injection of saline into the area of injury immediately after injury (controls, n = 11) or rat PRP (either immediately after injury [PRP day 0, n = 12], the first day after injury [PRP day 1, n = 12], or the third day after injury [PRP day 3, n = 11]). The primary outcome was maximal isometric torque strength of the injured muscle, which was assessed before injury as well as on postinjury days 1, 4, 7, 10, and 14. All animals were sacrificed on postinjury day 15. Histological and immunohistochemical analyses were performed on 6 specimens from each group after sacrifice. RESULTS The mean platelet concentration in the PRP was 2.19 × 10(6) (±2.69 × 10(5))/μL. The mean white blood cell count in the PRP was 22.54 × 10(3)/μL. Each group demonstrated statistically significant decreases in maximal isometric torque strength after injury when compared with preinjury levels, followed by significant increases back toward baseline values by postinjury day 14 (controls, 90.6% ± 7.90%; PRP day 0, 105.0% ± 7.60%; PRP day 1, 92.4% ± 7.60%; PRP day 3, 77.8% ± 7.90%) (P = .121). There were no statistically significant differences between the treatment and control groups at any of the time points. There were also no statistically significant differences between any of the groups in the percentage of centronucleated fibers (controls, 3.31% ± 5.10%; PRP day 0, 0.62% ± 1.59%; PRP day 1, 3.24% ± 5.77%; PRP day 3, 2.13% ± 3.26%) (P = .211) or the presence of inflammatory cells and macrophages. CONCLUSION In this rat contusion model, a local injection of PRP into the injured gastrocnemius muscle resulted in no significant differences in functional or histological outcomes, indicating no likely benefit to healing. Additionally, there was no significant difference between immediate or delayed administration of PRP. CLINICAL RELEVANCE Before PRP can be recommended for the treatment of muscle contusion injuries, further translational and clinical investigations need to be performed.
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Affiliation(s)
- Demetris Delos
- Orthopaedic and Neurosurgery Specialists, Greenwich, Connecticut, USA
| | - Matthew J Leineweber
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York, USA
| | - Salma Chaudhury
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Saif Alzoobaee
- Weill Medical College, Cornell University, New York, New York, USA
| | - Yingxin Gao
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York, USA
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Shah P, Keppler L, Rutkowski J. A review of platelet derived growth factor playing pivotal role in bone regeneration. J ORAL IMPLANTOL 2014; 40:330-40. [PMID: 24914921 DOI: 10.1563/aaid-joi-d-11-00173] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This article is focused on the literature review and study of recent advances in the field of bone grafting, which involves platelet-derived growth factor (PDGF) as one of the facilitating factors in bone regeneration. This article includes a description of the mechanism of PDGF for use in surgeries where bone grafting is required, which promotes future application of PDGF for faster bone regeneration or inhibition of bone growth if required as in osteosarcoma. The important specific activities of PDGF include mitogenesis (increase in the cell populations of healing cells), angiogenesis (endothelial mitoses into functioning capillaries), and macrophage activation (debridement of the wound site and a second phase source of growth factors for continued repair and bone regeneration). Thus PDGF can be utilized in wound with bone defect to conceal the wound with repair of bony defect.
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Affiliation(s)
- Prasun Shah
- 1 Maimonides Medical Center, Brooklyn, New York
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21
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Pak J, Lee JH, Lee SH. Regenerative repair of damaged meniscus with autologous adipose tissue-derived stem cells. BIOMED RESEARCH INTERNATIONAL 2014; 2014:436029. [PMID: 24592390 PMCID: PMC3925627 DOI: 10.1155/2014/436029] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 12/04/2013] [Accepted: 12/23/2013] [Indexed: 01/08/2023]
Abstract
Mesenchymal stem cells (MSCs) are defined as pluripotent cells found in numerous human tissues, including bone marrow and adipose tissue. Such MSCs, isolated from bone marrow and adipose tissue, have been shown to differentiate into bone and cartilage, along with other types of tissues. Therefore, MSCs represent a promising new therapy in regenerative medicine. The initial treatment of meniscus tear of the knee is managed conservatively with nonsteroidal anti-inflammatory drugs and physical therapy. When such conservative treatment fails, an arthroscopic resection of the meniscus is necessary. However, the major drawback of the meniscectomy is an early onset of osteoarthritis. Therefore, an effective and noninvasive treatment for patients with continuous knee pain due to damaged meniscus has been sought. Here, we present a review, highlighting the possible regenerative mechanisms of damaged meniscus with MSCs (especially adipose tissue-derived stem cells (ASCs)), along with a case of successful repair of torn meniscus with significant reduction of knee pain by percutaneous injection of autologous ASCs into an adult human knee.
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Affiliation(s)
- Jaewoo Pak
- Stems Medical Clinic, 32-3 Chungdam-dong, Gangnam-gu, Seoul 135-950, Republic of Korea
| | - Jung Hun Lee
- Stems Medical Clinic, 32-3 Chungdam-dong, Gangnam-gu, Seoul 135-950, Republic of Korea
- National Leading Research Laboratory, Department of Biological Sciences, Myongji University, 116 Myongjiro, Gyeonggido, Yongin 449-728, Republic of Korea
| | - Sang Hee Lee
- National Leading Research Laboratory, Department of Biological Sciences, Myongji University, 116 Myongjiro, Gyeonggido, Yongin 449-728, Republic of Korea
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Combined treatment with platelet-rich plasma and brain-derived neurotrophic factor-overexpressing bone marrow stromal cells supports axonal remyelination in a rat spinal cord hemi-section model. Cytotherapy 2013; 15:792-804. [PMID: 23731762 DOI: 10.1016/j.jcyt.2013.04.004] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 03/24/2013] [Accepted: 04/07/2013] [Indexed: 11/21/2022]
Abstract
BACKGROUND AIMS Combining biologic matrices is becoming a better choice to advance stem cell-based therapies. Platelet-rich plasma (PRP) is a biologic product of concentrated platelets and has been used to promote regeneration of peripheral nerves after injury. We examined whether PRP could induce rat bone marrow stromal cells (BMSCs) differentiation in vitro and whether a combination of BMSCs, PRP and brain-derived neurotrophic factor (BDNF) could provide additive therapeutic benefits in vivo after spinal cord injury (SCI). METHODS BMSCs and BDNF-secreting BMSCs (BDNF-BMSCs) were cultured with PRP for 7 days and 21 days, respectively, and neurofilament (NF)-200, glial fibrillary acidic protein (GFAP), microtubule-associated protein 2 (MAP2) and ribosomal protein S6 kinase (p70S6K) gene levels were assessed. After T10 hemi-section in 102 rats, 15-μL scaffolds (PRP alone, BMSCs, PRP/BMSCs, BDNF-BMSCs or PRP/BDNF-BMSCs) were transplanted into the lesion area, and real-time polymerase chain reaction, Western blot, immunohistochemistry and ultrastructural studies were performed. RESULTS The messenger RNA expression of NF-200, GFAP, MAP2 and p70S6K was promoted in BMSCs and BDNF-BMSCs after culture with PRP in vitro. BDNF levels were significantly higher in the injured spinal cord after implantation of BDNF-BMSCs. In the PRP/BDNF-BMSCs group at 8 weeks postoperatively, more GFAP was observed, with less accumulation of astrocytes at the graft-host interface. Rats that received PRP and BDNF-BMSC implants showed enhanced hind limb locomotor performance at 8 weeks postoperatively compared with control animals, with more axonal remyelination. CONCLUSIONS A combined treatment comprising PRP and BDNF-overexpressing BMSCs produced beneficial effects in rats with regard to functional recovery after SCI through enhancing migration of astrocytes into the transplants and axonal remyelination.
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Peng Y, Huang S, Wu Y, Cheng B, Nie X, Liu H, Ma K, Zhou J, Gao D, Feng C, Yang S, Fu X. Platelet rich plasma clot releasate preconditioning induced PI3K/AKT/NFκB signaling enhances survival and regenerative function of rat bone marrow mesenchymal stem cells in hostile microenvironments. Stem Cells Dev 2013; 22:3236-51. [PMID: 23885779 PMCID: PMC3868358 DOI: 10.1089/scd.2013.0064] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 07/25/2013] [Indexed: 01/07/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have been optimal targets in the development of cell based therapies, but their limited availability and high death rate after transplantation remains a concern in clinical applications. This study describes novel effects of platelet rich clot releasate (PRCR) on rat bone marrow-derived MSCs (BM-MSCs), with the former driving a gene program, which can reduce apoptosis and promote the regenerative function of the latter in hostile microenvironments through enhancement of paracrine/autocrine factors. By using reverse transcription-polymerase chain reaction, immunofluorescence and western blot analyses, we showed that PRCR preconditioning could alleviate the apoptosis of BM-MSCs under stress conditions induced by hydrogen peroxide (H2O2) and serum deprivation by enhancing expression of vascular endothelial growth factor and platelet-derived growth factor (PDGF) via stimulation of the platelet-derived growth factor receptor (PDGFR)/PI3K/AKT/NF-κB signaling pathways. Furthermore, the effects of PRCR preconditioned GFP-BM-MSCs subcutaneously transplanted into rats 6 h after wound surgery were examined by histological and other tests from days 0-22 after transplantation. Engraftment of the PRCR preconditioned BM-MSCs not only significantly attenuated apoptosis and wound size but also improved epithelization and blood vessel regeneration of skin via regulation of the wound microenvironment. Thus, preconditioning with PRCR, which reprograms BM-MSCs to tolerate hostile microenvironments and enhance regenerative function by increasing levels of paracrine factors through PDGFR-α/PI3K/AKT/NF-κB signaling pathways would be a safe method for boosting the effectiveness of transplantation therapy in the clinic.
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Affiliation(s)
- Yan Peng
- The Key Laboratory of Trauma Treatment & Tissue Repair of Tropical Area, PLA, Department of Plastic Surgery, Guangzhou General Hospital of Guangzhou Command, Guangzhou, People's Republic of China
- Southern Medical University, Guangzhou, People's Republic of China
- Burns Institute, Trauma Center of Postgraduate Medical College, The First Affiliated Hospital, General Hospital of PLA, Beijing, People's Republic of China
| | - Sha Huang
- Burns Institute, Trauma Center of Postgraduate Medical College, The First Affiliated Hospital, General Hospital of PLA, Beijing, People's Republic of China
- Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Sciences, General Hospital of PLA, Beijing, People's Republic of China
| | - Yan Wu
- Heilongjiang Key Laboratory of Anti-Fibrosis Biotherapy, Mudanjiang Medical College, Mudanjiang, People's Republic of China
| | - Biao Cheng
- The Key Laboratory of Trauma Treatment & Tissue Repair of Tropical Area, PLA, Department of Plastic Surgery, Guangzhou General Hospital of Guangzhou Command, Guangzhou, People's Republic of China
| | - Xiaohu Nie
- Southern Medical University, Guangzhou, People's Republic of China
| | - Hongwei Liu
- Key Laboratory for Regenerative Medicine, Ministry of Education, Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, People's Republic of China
| | - Kui Ma
- Burns Institute, Trauma Center of Postgraduate Medical College, The First Affiliated Hospital, General Hospital of PLA, Beijing, People's Republic of China
| | - Jiping Zhou
- Burns Institute, Trauma Center of Postgraduate Medical College, The First Affiliated Hospital, General Hospital of PLA, Beijing, People's Republic of China
| | - Dongyun Gao
- Burns Institute, Trauma Center of Postgraduate Medical College, The First Affiliated Hospital, General Hospital of PLA, Beijing, People's Republic of China
| | - Changjiang Feng
- Burns Institute, Trauma Center of Postgraduate Medical College, The First Affiliated Hospital, General Hospital of PLA, Beijing, People's Republic of China
| | - Siming Yang
- Burns Institute, Trauma Center of Postgraduate Medical College, The First Affiliated Hospital, General Hospital of PLA, Beijing, People's Republic of China
| | - Xiaobing Fu
- Burns Institute, Trauma Center of Postgraduate Medical College, The First Affiliated Hospital, General Hospital of PLA, Beijing, People's Republic of China
- Wound Healing and Cell Biology Laboratory, Institute of Basic Medical Sciences, General Hospital of PLA, Beijing, People's Republic of China
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Experimental study of the effect of autologous platelet-rich plasma on the early phases of osteoinduction by allogenic demineralized bone matrix. IMPLANT DENT 2013; 21:399-405. [PMID: 22971979 DOI: 10.1097/id.0b013e3182611f48] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To evaluate the effect of autologous platelet-rich plasma (PRP) on the early phases of osteoinduction by allogenic demineralized bone matrix (DBM) in rabbit intramuscular positions. MATERIALS AND METHODS Allogenic DBM was produced from bones of 3 healthy rabbits. In each of 6 experimental animals, 0.3 mL autologous PRP was prepared and 2 muscle pouches were created, where 250 mg DBM + PRP (experimental sites) and 250 mg DBM without PRP (control sites) were randomly implanted. Animals were euthanized 3 weeks postoperatively. RESULTS Histologic examination revealed uneventful healing in all cases, whereas remineralization of the periphery of the bone graft particles was a constant finding. In both control and experimental sites, fibroblasts and other mesenchymal cells (probably osteoprogenitor cells and preosteoblasts) were observed. The main histological difference was the recolonization of the empty lacunae of the bone graft particles by osteocytes at the control sites. The degradation of the graft at the control sites was statistically significantly quicker, although a statistically significant difference regarding the amount of the newly formed fibrous connective tissue was not observed. CONCLUSION The present study demonstrated that in this experimental model, the addition of PRP to DBM had a negative effect on the early phases of osteoinduction at 3 weeks of observation.
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Hu Z, Zhao G, Wang L, Pu B, Hao J, Lao H, Zhang X, Gan Q, Jiang W. Related Biological Research in the Interface between Bone Cement and Bone after Percutaneous Vertebroplasty. Int J Endocrinol 2013; 2013:109784. [PMID: 24222763 PMCID: PMC3814054 DOI: 10.1155/2013/109784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Revised: 06/01/2013] [Accepted: 06/24/2013] [Indexed: 11/20/2022] Open
Abstract
Percutaneous vertebroplasty (PVP) is widely used in the treatment of painful osteoporotic vertebral compression fractures with the injection of PMMA cement, and the controversy for PMMA damage to the osteoporotic bone tissue and to affect the fractures repairing never stops. 72 old female rabbits, each age 3.0~3.5 y, rabbits were assigned randomly to two groups of thirty-six each; PMMA cement were injected into vertebral body in rabbits via mimic PVP, sacrificed at 1 h, 24 h, 3 d, 7 d, 4 w, and 12 w. The expression VEGF and collagen type I, the tissue response, and repair reaction in the interface between PMMA and bone tissue were observed dynamically with RT-PCR and western blot technique; the osteocalcin expression were studied by immunohistochemistry. Compared with the control group, the expression of collagen I increased at 1 hour and was higher from 24 h to 3 d. From 4 weeks to 12 weeks after injection of PMMA. The expression of VEGF decreased at 1 hour and 24 hours, significantly increased at 3 days, decreased once again at 7 days, then increased significantly at 4-12 weeks. The osteocalcin expression continued to increase during 4 to 12 week. PMMA would not cause local bone permanent necrosis, and interface injury repairing cycle could be prolonged in a vertebroplasty.
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Affiliation(s)
- ZhenMing Hu
- Department of Spine Surgery, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Chongqing 400016, China
- *ZhenMing Hu:
| | - Gang Zhao
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Kunming Medical College, 1 Ma Yuan, Kunming, Yunnan 650101, China
| | - LiJun Wang
- Department of Orthopaedic Surgery, Dazu District Hospital of Chongqing, 138 West Longgang Road, Dazu District, Chongqing 402360, China
| | - Bo Pu
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Kunming Medical College, 1 Ma Yuan, Kunming, Yunnan 650101, China
| | - Jie Hao
- Department of Spine Surgery, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Chongqing 400016, China
| | - HanChang Lao
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Kunming Medical College, 1 Ma Yuan, Kunming, Yunnan 650101, China
| | - XiaoJun Zhang
- Department of Spine Surgery, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Chongqing 400016, China
| | - Qiang Gan
- Department of Spine Surgery, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Chongqing 400016, China
| | - Wei Jiang
- Department of Spine Surgery, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Road, Chongqing 400016, China
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El Backly RM, Zaky SH, Muraglia A, Tonachini L, Brun F, Canciani B, Chiapale D, Santolini F, Cancedda R, Mastrogiacomo M. A Platelet-Rich Plasma-Based Membrane as a Periosteal Substitute with Enhanced Osteogenic and Angiogenic Properties: A New Concept for Bone Repair. Tissue Eng Part A 2013; 19:152-65. [DOI: 10.1089/ten.tea.2012.0357] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Affiliation(s)
- Rania M. El Backly
- Department of Experimental Medicine, University of Genova, Genova, Italy
- A.O.U. San Martino–IST, National Cancer Research Institute, Genova, Italy
- Faculty of dentistry, Alexandria University, Alexandria, Egypt
| | - Samer H. Zaky
- Department of Experimental Medicine, University of Genova, Genova, Italy
- A.O.U. San Martino–IST, National Cancer Research Institute, Genova, Italy
| | | | - Laura Tonachini
- Department of Experimental Medicine, University of Genova, Genova, Italy
- A.O.U. San Martino–IST, National Cancer Research Institute, Genova, Italy
| | - Francesco Brun
- Department of Industrial Engineering and Information Technology, University of Trieste, Trieste, Italy
- Sincrotrone Trieste S.C.p.A., Trieste, Italy
| | - Barbara Canciani
- Department of Experimental Medicine, University of Genova, Genova, Italy
- A.O.U. San Martino–IST, National Cancer Research Institute, Genova, Italy
| | - Danilo Chiapale
- A.O.U. San Martino–IST, National Cancer Research Institute, Genova, Italy
| | - Federico Santolini
- A.O.U. San Martino–IST, National Cancer Research Institute, Genova, Italy
| | - Ranieri Cancedda
- Department of Experimental Medicine, University of Genova, Genova, Italy
- A.O.U. San Martino–IST, National Cancer Research Institute, Genova, Italy
| | - Maddalena Mastrogiacomo
- Department of Experimental Medicine, University of Genova, Genova, Italy
- A.O.U. San Martino–IST, National Cancer Research Institute, Genova, Italy
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The efficacy and safety of platelet-rich plasma and adipose-derived stem cells: an update. Arch Plast Surg 2012; 39:585-92. [PMID: 23233882 PMCID: PMC3518000 DOI: 10.5999/aps.2012.39.6.585] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 02/09/2012] [Accepted: 02/09/2012] [Indexed: 01/01/2023] Open
Abstract
During the past decade, many studies using platelet-rich plasma (PRP) or adipose-derived stem cells (ASCs) have been conducted in various medical fields, from cardiovascular research to applications for corneal diseases. Nonetheless, there are several limitations of practical applications of PRP and ASCs. Most reports of PRP are anecdotal and few include controls to determine the specific role of PRP. There is little consensus regarding PRP production and characterization. Some have reported the development of an antibody to bovine thrombin, which was the initiator of platelet activation. In the case of ASCs, good manufacturing practices are needed for the production of clinical-grade human stem cells, and in vitro expansion of ASCs requires approval of the Korea Food and Drug Administration, such that considerable expense and time are required. Additionally, some have reported that ASCs could have a potential risk of transformation to malignant cells. Therefore, the authors tried to investigate the latest research on the efficacy and safety of PRP and ASCs and report on the current state and regulation of these stem cell-based therapies.
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Murphy MB, Blashki D, Buchanan RM, Yazdi IK, Ferrari M, Simmons PJ, Tasciotti E. Adult and umbilical cord blood-derived platelet-rich plasma for mesenchymal stem cell proliferation, chemotaxis, and cryo-preservation. Biomaterials 2012; 33:5308-16. [PMID: 22542609 DOI: 10.1016/j.biomaterials.2012.04.007] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 04/01/2012] [Indexed: 02/07/2023]
Abstract
Platelet-rich plasma (PRP) was prepared from human adult peripheral blood and from human umbilical cord (uc) blood and the properties were compared in a series of in vitro bioassays. Quantification of growth factors in PRP and platelet-poor plasma (PPP) fractions revealed increased levels of mitogenic growth factors PDGF-AB, PDGF-BB, and FGF-2, the angiogenic agent VEGF and the chemokine RANTES in ucPRP compared to adult PRP (aPRP) and PPP. To compare the ability of the various PRP products to stimulate proliferation of human bone marrow (BM), rat BM and compact bone (CB)-derived mesenchymal stem cells (MSC), cells were cultured in serum-free media for 4 and 7 days with varying concentrations of PRP, PPP, or combinations of recombinant mitogens. It was found that while all forms of PRP and PPP were more mitogenic than fetal bovine serum, ucPRP resulted in significantly higher proliferation by 7 days than adult PRP and PPP. We observed that addition of as little as 0.1% ucPRP caused greater proliferation of MSC effects than the most potent combination of recombinant growth factors tested, namely PDGF-AB + PDGF-BB + FGF-2, each at 10 ng/mL. Similarly, in chemotaxis assays, ucPRP showed greater potency than adult PRP, PPP from either source, or indeed than combinations of either recombinant growth factors (PDGF, FGF, and TGF-β1) or chemokines previously shown to stimulate chemotactic migration of MSC. Lastly, we successfully demonstrated that PRP and PPP represented a viable alternative to FBS containing media for the cryo-preservation of MSC from human and rat BM.
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Affiliation(s)
- Matthew B Murphy
- Department of Nanomedicine, The Methodist Hospital Research Institute, Houston, TX 77025, USA
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Multi-composite bioactive osteogenic sponges featuring mesenchymal stem cells, platelet-rich plasma, nanoporous silicon enclosures, and Peptide amphiphiles for rapid bone regeneration. J Funct Biomater 2011; 2:39-66. [PMID: 24956163 PMCID: PMC4030897 DOI: 10.3390/jfb2020039] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 05/25/2011] [Accepted: 06/17/2011] [Indexed: 12/20/2022] Open
Abstract
A novel bioactive sponge was created with a composite of type I collagen sponges or porous poly(ε-caprolactone) (PCL) scaffolds, platelet-rich plasma (PRP), BMP2-loaded nanoporous silicon enclosure (NSE) microparticles, mineralizing peptide amphiphiles (PA), and mesenchymal stem cells (MSC). Primary MSC from cortical bone (CB) tissue proved to form more and larger colony units, as well as produce more mineral matrix under osteogenic differentiation, than MSC from bone marrow (BM). Coating pre-treatments were optimized for maximum cell adhesion and mineralization, while a PRP-based gel carrier was created to efficiently deliver and retain MSC and microparticles within a porous scaffold while simultaneously promoting cell recruitment, proliferation, and angiogenesis. Components and composite sponges were evaluated for osteogenic differentiation in vitro. Osteogenic sponges were loaded with MSC, PRP, PA, and NSE and implanted subcutaneously in rats to evaluate the formation of bone tissue and angiogenesis in vivo. It was found that the combination of a collagen sponge with CB MSC, PRP, PA, and the BMP2-releasing NSE formed the most bone and was most vascularized by four weeks compared to analogous composites featuring BM MSC or PCL or lacking PRP, PA, and NSE. This study indicates that CB MSC should be considered as an alternative to marrow as a source of stem cells, while the PRP-PA cell and microparticle delivery system may be utilized for diverse tissue engineering applications.
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Stenport VF, Örtorp A, Thor A. Onlay and inlay bone grafts with platelet-rich plasma: histologic evaluations from human biopsies. J Oral Maxillofac Surg 2011; 69:1079-85. [PMID: 21440827 DOI: 10.1016/j.joms.2010.11.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 09/06/2010] [Accepted: 11/08/2010] [Indexed: 10/18/2022]
Abstract
PURPOSE The aim of the present study was to histomorphometrically evaluate biopsies from 1) sinus inlay bone grafts prepared with or without platelet-rich plasma (PRP) and 2) onlay bone grafts in the anterior maxilla with particulate bone and PRP or block bone without PRP after 3 months. MATERIALS AND METHODS Biopsies were retrieved with a trephine drill, and samples were processed in laboratories to result in nondecalcified cut and ground sections. Light microscopic measurements of total bone area, new bone, number of vessels, and vessel area were performed at 3 regions in each sample. Calculations of ratios of new bone to total bone and vessel area to total area were performed. RESULTS There was a tendency toward higher mean values for total bone area percentage and area of newly formed bone in the PRP-treated inlay biopsies. However, there was no measurable effect on vessel formation in the PRP-treated inlay samples compared with untreated inlay samples. Particulate and PRP-treated onlay bone biopsies showed higher mean values in all measured parameters compared with block bone samples; however, no differences were statistically significant. CONCLUSION PRP treatment may favor bone formation in grafted bone, and further research is needed to describe the outcome of PRP treatment and grafting techniques in the maxilla.
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Breast Fat Grafting with Platelet-Rich Plasma: A Comparative Clinical Study and Current State of the Art. Plast Reconstr Surg 2011; 127:2176-2185. [DOI: 10.1097/prs.0b013e3182139fe7] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Xie L, Wang P, Pan J, Sun Z, Cui F. The Effect of Platelet-rich Plasma with Mineralized Collagen-based Scaffold on Mandible Defect Repair in Rabbits. J BIOACT COMPAT POL 2010. [DOI: 10.1177/0883911510382132] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The effect of platelet-rich plasma (PRP) on a porous scaffold of nano-hydroxyapatite/collagen/poly(lactic-acid) (nHAC/PLA) to repair a mandible defect in a rabbit model was evaluated. A 10 × 8 mm2 perforated defect roughly 5 mm thick was made in the right mandible of each animal, preserving the periosteum in situ. The defects were treated using nHAC/PLA grafts with or without autologous PRP. The results of X-ray, dual energy X-ray measurements of bone mineral density, scanning electron microscopy, histology, and newly formed bony area evaluated by ANOVA showed that PRP significantly shorten recovery time and accelerate defect repair, especially in the first month. The incorporation of PRP appears to be an effective approach for improving bone repair.
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Affiliation(s)
- L.N. Xie
- Department of Oral and Maxillo-facial Surgery, School of Stomatology Capital Medical University, Beijing 100050, China
| | - P. Wang
- Department of Oral and Maxillo-facial Surgery, School of Stomatology Capital Medical University, Beijing 100050, China
| | - J.L. Pan
- Department of Oral and Maxillo-facial Surgery, School of Stomatology Capital Medical University, Beijing 100050, China,
| | - Z. Sun
- Department of Oral and Maxillo-facial Surgery, School of Stomatology Capital Medical University, Beijing 100050, China
| | - F.Z. Cui
- State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China,
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