Platelet-rich fibrin(PRF)is widely used in dentistry and other fields of medicine,and its use has become popular in dental implantology.In several published studies,PRF has been used as a barrier membrane.A barrier me...Platelet-rich fibrin(PRF)is widely used in dentistry and other fields of medicine,and its use has become popular in dental implantology.In several published studies,PRF has been used as a barrier membrane.A barrier membrane is a sheet of a certain material that acts as a biological and mechanical barrier against the invasion of cells that are not involved in bone formation,such as epithelial cells.Among the basic requirements of a'barrier membrane,occlusivity,stiffness,and space maintenance are the criteria that PRF primarily lacks;therefore,it does not fall under the category of barrier membranes.However,there is evidence that PRF membranes are useful in significantly improving wound healing.Does the PRF membrane act as a barrier?Should we think of adding or subtracting some points from the ideal requirements of a barrier membrane,or should we coin a new term or concept for PRF that will incorporate some features of a barrier membrane and be a combination of tissue engineering and biotechnology?This review is aimed at answering the basic question of whether the PRF membrane should be considered a barrier membrane or whether it is something more beyond the boundaries of a barrier membrane.展开更多
Objective: The aim of the study was to evaluate the effect of platelet rich growth factors (PRGFs) in treatment of temporomandibular joint disc displacement. Materials and Methods: The study subjects included 8 female...Objective: The aim of the study was to evaluate the effect of platelet rich growth factors (PRGFs) in treatment of temporomandibular joint disc displacement. Materials and Methods: The study subjects included 8 females having bilateral anterior disc displacement with reduction and 1 female having bilateral anterior disc displacement without reduction with the age range between 20 - 35 years. The process of obtaining PRGFs was carried out following the Anitua Technique. Results: Clinical parameters of Interincisal distance, Lateral excursion of mandible using digital caliper in millimeters and Visual Analogue Scale (VAS 0/10) for pain intensity score were used. All of these parameters were running through the intervals of two, four, and eight weeks till the end of the follow-up period at twenty-six weeks (six months). The participated patients showed the clinical improvement in the different clinical statuses such as interincisal distance;lateral excursion of mandible and Pain Score. Conclusion: the study reported early efficacy of PRGFs after the arthrocentesis of the joint in treatment of TMJ disc displacement, and according to our results, the injection of PRGFs could be a possible alternative treatment for patients who did not respond to standard treatment.展开更多
Introduction: Platelet Rich-Fibrin (PRF) is a biological matrix derived from a patient’s own blood, rich in growth factors and platelets. Its use in various periodontal and non-periodontal procedures is gaining recog...Introduction: Platelet Rich-Fibrin (PRF) is a biological matrix derived from a patient’s own blood, rich in growth factors and platelets. Its use in various periodontal and non-periodontal procedures is gaining recognition due to its potential in promoting tissue regeneration. The purpose of this review was to evaluate the benefits of using PRF in intra-bony defect regeneration, guided-bone regeneration, and sinus floor elevation. Methods: The study searched PubMed for manuscripts published between 2017 and 2022 to better understand the clinical and radiological effects of PRF. The manuscripts were divided into the following sections: intra-bony defect regeneration, guided-bone regeneration, and sinus floor elevation. Results: In intra-bony defects, PRF improved clinical and radiological parameters when compared with OFD alone, with a significant difference in wound healing at 7 days. In GBR, a CBCT evaluation shows no statistical difference between the PRF-autogenous bone complex group and the bovine bone-collagen membrane complex regarding volume change of the augmented bone with a 16% rate of bone loss following a 6-month healing period. Also, a slight increase in bone thickness has been seen when liquid PRF is used. In sinus floor elevation, results revealed no differences in graft volume between PRF group and control group at any of the evaluated time points. Although higher implant stability immediately postoperatively, higher new bone formation, the lesser amount of residual graft and earlier implant placement. Conclusion: Platelet Rich-Fibrin is widely accepted for use in periodontal surgery and dentistry due to its minimally invasive nature and low risk of adverse effects, with positive results in tissue regeneration. There is evidence that PRF leads to improved and faster healing, as well as cost-effective regenerative procedures compared to other treatments.展开更多
Aim: To evaluate the effects based the changes on ultrasound and on magnetic resonance for knee osteoarthritis treatment by platelet-rich plasma therapy in combination with mesenchymal stem cell from autologous adipos...Aim: To evaluate the effects based the changes on ultrasound and on magnetic resonance for knee osteoarthritis treatment by platelet-rich plasma therapy in combination with mesenchymal stem cell from autologous adipose tissue. Objects and Methods: 30 patients, 26 females, 4 males, mean age 58.63 ± 11.11, mean disease duration 5.3 ± 4.6 years, respectively 60 knee joints were diagnosed with osteoarthritis at stage II - III according to the Kellgren and Lawrence classifications. After ultrasound and magnetic resonance imaging in the first time, all patients were injected with platelet-rich plasma combined with mesenchymal stem cells from autologous adipose tissue into both knee joints. Results: After treatment 12 months by platelet-rich plasma injection combined with mesenchymal stem cells from autologous adipose tissue: The thickness of articular cartilage on ultrasound increased significantly from 2.08 ± 0.36 mm to 2.48 ± 0.36 mm with p Conclusion: The treatment of knee osteoarthritis by platelet-rich plasma combined with mesenchymal stem cells from autologous adipose tissue was effective in improving cartilage thickness on ultrasound and magnetic resonance, thereby improving the motor function of the knee joint.展开更多
Administration of platelet rich plasma(PRP) and bone marrow aspirate concentrate(BMAC) has shown some promise in the treatment of neurological conditions;however, there is limited information on combined administratio...Administration of platelet rich plasma(PRP) and bone marrow aspirate concentrate(BMAC) has shown some promise in the treatment of neurological conditions;however, there is limited information on combined administration. As such, the purpose of this study was to assess safety and functional outcomes for patients administered combined autologous PRP and BMAC for spinal cord injury(SCI). This retrospective case series included seven patients who received combined treatment of autologous PRP and BMAC via intravenous and intrathecal administration as salvage therapy for SCI. Patients were reviewed for adverse reactions and clinical outcomes using the Oswestry Disability Index(ODI) for up to 1 year, as permitted by availability of follow-up data. Injury levels ranged from C3 through T11, and elapsed time between injury and salvage therapy ranged from 2.4 months to 6.2 years. Post-procedure complications were mild and rare, consisting only of self-limited headache and subjective memory impairment in one patient. Four patients experienced severe disability prior to PRP combined with BMAC injection, as evidenced by high(> 48/100) Oswestry Disability Index scores. Longitudinal Oswestry Disability Index scores for two patients with incomplete SCI at C6 and C7, both of whom had cervical spine injuries, demonstrated a decrease of 28–40% following salvage therapy, representing an improvement from severe to minimal disability. In conclusion, intrathecal/intravenous co-administration of PRP and BMAC resulted in no significant complications and may have had some clinical benefits. Larger clinical studies are needed to further test this method of treatment for patients with SCI who otherwise have limited meaningful treatment options. This study was reviewed and approved by the Ohio Health Institutional Review Board(IRB No. 1204946) on May 16, 2018.展开更多
Background:Platelet rich plasma(PRP) therapy is widely used in enhancing the recovery of skeletal muscle from injury.However,the impact of intramuscular delivery of PRP on hematologic and biochemical responses has not...Background:Platelet rich plasma(PRP) therapy is widely used in enhancing the recovery of skeletal muscle from injury.However,the impact of intramuscular delivery of PRP on hematologic and biochemical responses has not been fully elucidated in exercise-induced muscle damage.The purpose of this investigation the effects of intramuscular delivery of PRP on hematologic and biochemical responses and recovery strategy muscle damage induced by high intensity muscle exercise(exercise-induced muscle damage,EIMD).Methods:Moderately active male volunteers participated in this study and were assigned to a control group(control,n = 6) and PRP administration group(PRP,n = 6).The subjects performed exercise with a load of 80% one repetition maximum(1RM) maximal voluntary contraction of the elbow flexors until point of exhaustion of the non-dominant arm was reached.The arms were treated with saline or autologous PRP post-24 h EIMD.Venous blood samples were obtained in the morning to establish a baseline value and 1–4 days post-exercise and were analyzed for serum ferritin,iron,iron binding capacity(IBC),creatinine kinase(CK),lactate dehydrogenase(LDH),aspartate aminotransferase(AST),and alanine aminotransferase(ALT).Results:The baseline levels of plasma iron,ferritin,IBC,CK,LDH,AST,and ALT were similar in both the control and PRP groups.However,24-h following exercise a significant increase in these parameters was observed in both groups between 1 and 4 days during the recovery period.Interestingly,PRP administration decreased plasma iron levels compared to the control on the second day post-exercise.Plasma IBC increased in PRP group from Days 2 to 4 post-exercise compared to the control group whilst PRP administration had no effect on plasma ferritin,CK,AST,ALT,or LDH.Conclusion:Acute exhaustive exercise increased muscle damage markers,including plasma iron,IBC,and ferritin levels,indicating muscle damage induced by exercise.PRP administration improves inflammation by reversing the increase in the iron levels post-exercise without displaying any myotoxicity and may have a role to play in the recovery of exercise-induced muscle damage.展开更多
Autophagy is an essential cellular homeostatic mechanism by which intracellular components are delivered into the lysosomes for degradation and recycling.Autophagy has been related with a diversity of pathological or ...Autophagy is an essential cellular homeostatic mechanism by which intracellular components are delivered into the lysosomes for degradation and recycling.Autophagy has been related with a diversity of pathological or physiological dentary processes such as bone remodeling,skeletal aging,osteoclastogenesis,osteoblastogenesis and different types of oral cancer.Platelet-rich plasma(PRP),isolated from autologous blood,is a plasma preparation containing a higher concentration of platelets which contains numerous different growth factors and cytokines that activate several cellular signaling cascades.The purpose of this study is to investigate the effect of PRP on autophagy stimulation in both osteoblast precursor 3T3-L1 and non-related osteoblastic cells.Our results showed that PRP can increase the number of autophagic structures in 3T3-L1 and HeLa(cervical cancer cells)cells.Moreover,we have determined by Western blot a rise in the lipidated form of the autophagic protein LC3(i.e.LC3-II)upon PRP treatment.Taken together,our results suggest that PRP is able to induce a strongly autophagy response in osteoblast precursor and,to a lesser extent,in non-related osteoblastic cells,suggesting that PRP could be a potential therapeutic tool for some autophagy-related diseases associated with bone homeostasis.展开更多
Diabetic foot ulcer,as a common complication of diabetes,is a difficult problem in clinical practice.As a new therapeutic method,platelet rich plasma has the functions of anti-inflammatory,bacteriostasis,microcirculat...Diabetic foot ulcer,as a common complication of diabetes,is a difficult problem in clinical practice.As a new therapeutic method,platelet rich plasma has the functions of anti-inflammatory,bacteriostasis,microcirculation reconstruction,cell proliferation and differentiation,cell apoptosis reduction,peripheral nerve repair and so on.It can promote tissue repair and ulcer healing at every stage of diabetic foot ulcer.This article reviews the preparation of platelet rich plasma,the mechanism of action,the treatment of diabetic foot ulcer,the existing problems and the future development.展开更多
BACKGROUND Anastomotic leak constitutes a major problem in abdominal surgery.Technical insufficiency,topical or systemic factors contribute to disrupted healing of the performed bowel anastomosis and result in anastom...BACKGROUND Anastomotic leak constitutes a major problem in abdominal surgery.Technical insufficiency,topical or systemic factors contribute to disrupted healing of the performed bowel anastomosis and result in anastomosis leakage,with detrimental effects on patient postoperative outcomes.Despite the investigation of several factors and the invention of protective materials,the ideal agent to prevent anastomotic leaks is yet to be determined.AIM To study the effect of platelet rich plasma(PRP)on the healing of bowel anastomoses.METHODS A systematic literature search was performed in PubMed,EMBASE,and Scopus databases to identify studies investigating the effect of PRP application on bowel anastomosis.RESULTS Eighteen studies were eligible with a total population of 712 animals including rats(14 studies),rabbits(2 studies)and pigs(2 studies).No postoperative complications were reported following PRP application.Fourteen out of 18 studies reported a statistically significant higher anastomosis bursting pressure in PRP groups compared to control either in healthy animals or animal models with underlying condition or intervention,such as intraperitoneal chemotherapy or peritonitis.Similar results were reported by ten studies in terms of tissue hydroxyproline levels.One study reported significant increase in collagen deposition in PRP groups.PRP application resulted in significantly decreased inflammatory cell infiltration in the presence of peritonitis or intraperitoneal chemotherapy(6 studies).CONCLUSION The application of PRP is associated with improved bowel anastomosis outcomes,especially in animal models having an underlying condition affecting the normal healing process.PRP application seems to augment the normal healing process under these circumstances.However,further studies are needed to investigate the potential role of PRP on bowel anastomosis healing,especially in clinical settings.展开更多
Cystitis often appears even in absence of bacteria colonization. Trigonitis and interstitial inflammation are the most common morphological features of abacterial cystitis in young and post menopausal women. Arterial ...Cystitis often appears even in absence of bacteria colonization. Trigonitis and interstitial inflammation are the most common morphological features of abacterial cystitis in young and post menopausal women. Arterial obstructive disease and bladder ischemia might play an important role in bladder dysfunction. Activated inflammatory cells produce ROS (radicals of oxygen), NF kB seems involved in ROS synthesis. Clinical studies have indicated that high CO2 levels can impact upon peripheral tissue, reducing ischaemia, responsible of recurrent inflammation and consequently reducing oxydative phenomena. PRP (platelet-rich plasma) is a volume of fractionated plasma from the patient's own blood that contains platelet concentrate rich of alpha granules. PRP interacts tissue repair mechanisms by placing supra-physiological concentrations of autologous platelets at the site of tissue damage. This study proposes a single PRP transvaginal injection followed by 10 weekly applications of carboxytherapy, using subcutaneous injections of sterile CO2 gas. We have selected 6 Women (50-75 years), affected by recurrent abacterial cystitis with Pain and urge incontinence. All patients showed a subjective sensible reduction of symptoms. After 2 months all patients have neither inflammatory symptoms nor endoscopic evidence of trigonitis. Preliminary qualitative results could encourage the use of carboxytherapy and PRP in treatment of abacterial and interstitial cystitis.展开更多
Osteoarthritis(OA)is a complex"whole joint"disease pursued by inflammatory mediators,rather than purely a process of"wear and tear".Besides cartilage degradation,synovitis,subchondral bone remodeli...Osteoarthritis(OA)is a complex"whole joint"disease pursued by inflammatory mediators,rather than purely a process of"wear and tear".Besides cartilage degradation,synovitis,subchondral bone remodeling,degeneration of ligaments and menisci,and hypertrophy of the joint capsule take parts in the pathogenesis.Pain is the hallmark symptom of OA,but the extent to which structural pathology in OA contributes to the pain experience is still not well known.For the knee OA,intraarticular(IA)injection(corticosteroids,viscosupplements,blood-derived products)is preferred as the last nonoperative modality,if the other conservative treatment modalities are ineffective.IA corticosteroid injections provide short term reduction in OA pain and can be considered as an adjunct to core treatment for the relief of moderate to severe pain in people with OA.IA hyaluronic acid(HA)injections might have efficacy and might provide pain reduction in mild OA of knee up to 24 wk.But for HA injections,the costeffectiveness is an important concern that patients must be informed about the efficacy of these preparations.Although more high-quality evidence is needed,recent studies indicate that IA platelet rich plasma injections are promising for relieving pain,improving knee function and quality of life,especially in younger patients,and in mild OA cases.The current literature and our experience indicate that IA injections are safe and have positive effects for patient satisfaction.But,there is no data that any of the IA injections will cause osteophytes to regress or cartilage and meniscus to regenerate in patients with substantial and irreversible bone and cartilage damage.展开更多
The use of PRP involves a complex network of molecular events which accelerate tissue regenera-tion due to its richness in growth factors plus a variety of biologic mediators. Several communica-tions tell us about its...The use of PRP involves a complex network of molecular events which accelerate tissue regenera-tion due to its richness in growth factors plus a variety of biologic mediators. Several communica-tions tell us about its usefulness on the dental implantology field, plastic surgery, orthopedics and peripheral nerve regeneration after trauma. We have presented our successful experience of its use in pneumology when treating severe hemoptysis, respiratory fistulae, spontaneous pneumothorax and one tracheal rupture. In this article we present two cases of post intubation tracheal rupture successfully treated with the local instillation of PRP on one of them and with the injection of PRP along the lips of the tracheal wound on the other. Tracheal rupture is a rare but life threatening complication of emergency intubation requiring an effective response in order to avoid the risk of patient death due to secondary mediastinitis and sepsis. Up to now there is no general consensus in the treatment of this condition and alternatives in use are not universally accepted. The use of local autologous PRP in our experience has demonstrated a favorable performance in such cases, turning it in a highly promising tool for the treatment of conditions such as this, in which a rapidly effective and minimally invasive handling is required.展开更多
Platelet-rich plasma (PRP) has been used as a therapeutic tool to promote wound healing, in orthopedics, dermatology, oral surgery, etc. However, the mechanisms underlying the wound healing effects of PRP remain uncle...Platelet-rich plasma (PRP) has been used as a therapeutic tool to promote wound healing, in orthopedics, dermatology, oral surgery, etc. However, the mechanisms underlying the wound healing effects of PRP remain unclear. The purpose of this study was to evaluate the effectiveness of applying PRP, particularly in the management of tooth extraction sockets. Three upper molars of Fischer rats were extracted, and blood was drawn from the hearts of other rats to prepare PRP. The PRP was activated and applied to the bone defects of the experimental group, and nothing was applied to the bone defects of the control group. On day 3, fibrin network and granulation tissue, which are abundant in blood capillaries, were seen under the PRP layer in the experimental group. On the other hand, only inflammatory cells and a fibrin network were observed in the bone defects of the control group. On day 7, granulation tissue was seen in the bone defects in both the control group and experimental group, although excavation of granulation tissue was noted in the control group. The results demonstrated the presence of a rich fibrin network and early inflammatory reactions in the experimental group, which may lead to rise of thick, vessel-rich granulation tissue. The application of PRP may stimulate wound healing in tooth extraction bone defects, and PRP may confer some beneficial effects on the outcomes.展开更多
Carpal tunnel release is one of the most common and surgery procedures performed. Complications and recurrence of the condition can occur up to 20% of cases. We describe a technique of utilizing the nanofat and platel...Carpal tunnel release is one of the most common and surgery procedures performed. Complications and recurrence of the condition can occur up to 20% of cases. We describe a technique of utilizing the nanofat and platelet rich plasma to successfully enhance healing and minimize risk of recurrence after endoscopic carpal tunnel release. This patient had exceptionally fast recovery, resuming work in one day and excellent grip strength and a full functioning level at his two-week follow-up. After one year he continues to demonstrate a complete resolution of symptoms and full function without any evidence of recurrence or complications.展开更多
Introduction: Leukocyte and platelet-rich fibrin (L-PRF) is an emerging material in dentistry, however, there are controversies surrounding its effectiveness. Despite the amount of literature available, debates regard...Introduction: Leukocyte and platelet-rich fibrin (L-PRF) is an emerging material in dentistry, however, there are controversies surrounding its effectiveness. Despite the amount of literature available, debates regarding its effect continue. This review aims to summarize and clarify the data surrounding the use of L-PRF in promoting the healing of extraction sockets, which may offer a better outcome for future treatments. Purpose: The purpose of this review is to evaluate the current literature on the use of L-PRF in promoting the healing of extraction sockets, and to provide a comprehensive overview of the available evidence. Methods: A comprehensive computer-based search of databases such as PubMed, Medline, and Cochrane Library was conducted. Results: The results of this review suggest that L-PRF has shown promise in promoting early healing of extraction sockets, but the evidence for its effectiveness over a longer period is limited. Conclusion: Although L-PRF has shown promising results in the early healing periods, its effectiveness over a longer healing period cannot be confirmed based on the available data. More clinical trials with standardized protocols and consistent measurement methods are needed to establish the role of L-PRF in enhancing the healing of extraction sockets.展开更多
Objective: To explore the effect of Bismuth Subgallate/Borneol (Suile<sup>TM</sup> BSB) healing dressing combined with autologous platelet-rich gel (APG) in the treatment of diabetic foot ulcer (DFU). Meth...Objective: To explore the effect of Bismuth Subgallate/Borneol (Suile<sup>TM</sup> BSB) healing dressing combined with autologous platelet-rich gel (APG) in the treatment of diabetic foot ulcer (DFU). Methods: A total of 120 patients with DFU hospitalized in the Changsha Central Hospital from August 2020 to September 2021 were selected and randomly divided into an experimental group (BSB + APG, n = 60) and a control group (BSB, n = 60) according to random number table method. The total therapeutic effect, healing time, hospital stay, level indexes of various inflammatory factors before and after treatment and ulcer area were observed in the two groups. Results: The total effect of the control group was worse than that of the experimental group, and the data between the two groups were significant (P 0.05);after treatment, the levels of inflammatory factors including WBC, CRP, IL-6 and TNF-α in the control group were higher than those in the experimental group, and there was significant difference between the two groups (P 0.05);after 14 days of treatment, the ulcer area in the control group was larger than that in the experimental group, and the data between the two groups were significant (P Conclusion: BSB combined with APG can achieve better therapeutic effect, reduce the inflammatory reaction of patients, and promote wound healing in the treatment of patients with diabetic foot ulcer.展开更多
Objective: To evaluate the efficacy based on clinical symptom and on magnetic resonance image of platelet-rich plasma therapy in combination with mesenchymal stem cells from autologous adipose tissue for knee osteoart...Objective: To evaluate the efficacy based on clinical symptom and on magnetic resonance image of platelet-rich plasma therapy in combination with mesenchymal stem cells from autologous adipose tissue for knee osteoarthritis treatment. Patients and Method: 30 patients including 26 females and 4 males;correspondingly, 60 knee joints were diagnosed with osteoarthritis with stages II - III of Kellgren and Lawrence, their mean age was 58.63 ± 11.11. All were injected with autologous platelet-rich plasma that was extracted by PRP set, APC 30 PRP PRCEDURE PRAK and autologously extracted mesenchymal stem cells from abdominal adipose tissue using the ADI-25-01 ADIPOSEPRCEDURE PRAK of USA. Results: After 12 months: the pain level according to VAS score at the right knee joint was decreased from 6.0 ± 1.28 before treatment to 1.9 ± 0.3;VAS score at the left knee joint was decreased from 6.43 ± 1.19 to 2.25 ± 0.43. Total Lequene score at right knee joint was decreased from 16.04 ± 1.57 before treatment to 4.31 ± 1.04, at left knee joint was decreased from 17.52 ± 1.74 before treatment to 5.15 ± 1.48. Total WOMAC score at right knee joint was decreased from 55.93 ± 5.56 to 10.37 ± 1.56;at left knee joint was decreased from 53.97 ± 5.57 to 10.07 ± 1.59. There were 86.77% joints with cartilage thickness change and the patellar cartilage thickness was increased from 1.56 ± 0.09 mm before treatment to 1.65 ± 0.09 mm. Conclusion: The treatment of knee osteoarthritis by platelet-rich plasma therapyin combination with mesenchymal stem cells from autologous adipose tissue is effective in reducing pain, improving patient's mobility and walking function, reforming articular cartilage thickness on magnetic resonance image.展开更多
The aim of this study was to investigate the effect of platelet-rich plasma(PRP)on cavernous nerve(CN)regeneration and functional status in a nerve-crush rat model.Twenty-four Sprague-Dawley male rats were randomly di...The aim of this study was to investigate the effect of platelet-rich plasma(PRP)on cavernous nerve(CN)regeneration and functional status in a nerve-crush rat model.Twenty-four Sprague-Dawley male rats were randomly divided into three equal groups:eight had a sham operation,eight underwent bilateral nerve crushing with no further intervention and eight underwent bilateral nerve crushing with an immediate application of PRP on the site of injury.Erectile function was assessed by CN electrostimulation at 3 months and nerve regeneration was assessed by toluidine blue staining of CN and nicotinamide adenine dinucleotide phosphate(NADPH)-diaphorase staining of penile tissue.Three months after surgery,in the group that underwent bilateral nerve crushing with no further intervention,the functional evaluation showed a lower mean maximal intracavernous pressure(ICP)and maximal ICP per mean arterial pressure(MAP)with CN stimulation than those in the sham group.In the group with an immediate application of PRP,the mean maximal ICP and maximal ICP/MAP were significantly higher than those in the injured control group.Histologically,the group with the application of PRP had more myelinated axons of CNs and more NADPH-diaphorase-positive nerve fibres than the injured control group but fewer than the sham group.These results show that the application of PRP to the site of CN-crush injury facilitates nerve regeneration and recovery of erectile function.Our research indicates that clinical application of PRP has potential repairing effect on CN and peripheral nerves.展开更多
Several studies demonstrated the favorable effects of platelet rich plasma(PRP)on the skin and promoted its wide use in clinical practice.The growth factors stored in platelet alfa-granules allow for the tissue regene...Several studies demonstrated the favorable effects of platelet rich plasma(PRP)on the skin and promoted its wide use in clinical practice.The growth factors stored in platelet alfa-granules allow for the tissue regeneration and the main fields of application of PRP in current clinical practice are the cartilage and musculoskeletal defects,osteoarthritis and other bone disorders,chronic and difficult to heal wounds,and aesthetic procedures.The relevant number of different PRP preparation protocols may explain the inconsistency of the different clinical outcomes reported in the literature.Despite the technological advances in PRP preparation,the objective assessment of the clinical efficacy of PRP from the literature reports still is difficult due to the low homogeneity of the samples in terms of both inclusion criteria and size.Therefore,it might be useful to establish standardized and reproducible experimental models to confirm and objectively measure the effectiveness of the available clinical results.Many experimental investigations have been carried out to objectively assess the effectiveness of PRP and platelet gel on several tissues.As far as the skin is concerned,the studies carried out to date are limited to fibroblasts in in-vitro culture models or to collagen,vascular supply,epithelium,and hair follicle in in-vivo models.The skin,however,is a very complex organ,where different cell lines coexist and feature complex mutual interaction.A model that combines the advantages of both in-vitro and in-vivo cultures is the ex-vivo model.The demonstration of the platelet derived growth factors effects through the ex-vivo human full-thickness skin culture model is a keystone to support the evidence of the PRP effectiveness,as it represents an objective,fast,reproducible,and ethical investigational method.展开更多
<b>Context and Aim:</b> Mesenchymal stem cells (MSCs) and platelet-rich fibrin (PRF) have emerged as ideal candidates for advanced therapies of various therapeutically-challenging diseases;however, their r...<b>Context and Aim:</b> Mesenchymal stem cells (MSCs) and platelet-rich fibrin (PRF) have emerged as ideal candidates for advanced therapies of various therapeutically-challenging diseases;however, their regenerative potential in diabetic foot ulcers (DFU) has not been well determined. In this study, we reviewed our clinical experience in mitigating chronic ulcer complications of diabetic foot through a conventional treatment of autologous adipose-derived MSCs embedded in PRF with pure PRF injections. <b>Materials and Methods:</b> The present study was carried out in 10 patients with an open DFU wound selected over a period of 1 year starting from April 2019. Patients were either injected with PRF alone (Group A) or injected with MSCs derived from adipose tissue (ADMSC) embedded in (PRF (Group B). <b>Results:</b> Patients in Group B had a better healing index when compared to Group A. <b>Conclusion:</b> Use of ADMSC embedded in PRF showed promising results to treat DFU.展开更多
文摘Platelet-rich fibrin(PRF)is widely used in dentistry and other fields of medicine,and its use has become popular in dental implantology.In several published studies,PRF has been used as a barrier membrane.A barrier membrane is a sheet of a certain material that acts as a biological and mechanical barrier against the invasion of cells that are not involved in bone formation,such as epithelial cells.Among the basic requirements of a'barrier membrane,occlusivity,stiffness,and space maintenance are the criteria that PRF primarily lacks;therefore,it does not fall under the category of barrier membranes.However,there is evidence that PRF membranes are useful in significantly improving wound healing.Does the PRF membrane act as a barrier?Should we think of adding or subtracting some points from the ideal requirements of a barrier membrane,or should we coin a new term or concept for PRF that will incorporate some features of a barrier membrane and be a combination of tissue engineering and biotechnology?This review is aimed at answering the basic question of whether the PRF membrane should be considered a barrier membrane or whether it is something more beyond the boundaries of a barrier membrane.
文摘Objective: The aim of the study was to evaluate the effect of platelet rich growth factors (PRGFs) in treatment of temporomandibular joint disc displacement. Materials and Methods: The study subjects included 8 females having bilateral anterior disc displacement with reduction and 1 female having bilateral anterior disc displacement without reduction with the age range between 20 - 35 years. The process of obtaining PRGFs was carried out following the Anitua Technique. Results: Clinical parameters of Interincisal distance, Lateral excursion of mandible using digital caliper in millimeters and Visual Analogue Scale (VAS 0/10) for pain intensity score were used. All of these parameters were running through the intervals of two, four, and eight weeks till the end of the follow-up period at twenty-six weeks (six months). The participated patients showed the clinical improvement in the different clinical statuses such as interincisal distance;lateral excursion of mandible and Pain Score. Conclusion: the study reported early efficacy of PRGFs after the arthrocentesis of the joint in treatment of TMJ disc displacement, and according to our results, the injection of PRGFs could be a possible alternative treatment for patients who did not respond to standard treatment.
文摘Introduction: Platelet Rich-Fibrin (PRF) is a biological matrix derived from a patient’s own blood, rich in growth factors and platelets. Its use in various periodontal and non-periodontal procedures is gaining recognition due to its potential in promoting tissue regeneration. The purpose of this review was to evaluate the benefits of using PRF in intra-bony defect regeneration, guided-bone regeneration, and sinus floor elevation. Methods: The study searched PubMed for manuscripts published between 2017 and 2022 to better understand the clinical and radiological effects of PRF. The manuscripts were divided into the following sections: intra-bony defect regeneration, guided-bone regeneration, and sinus floor elevation. Results: In intra-bony defects, PRF improved clinical and radiological parameters when compared with OFD alone, with a significant difference in wound healing at 7 days. In GBR, a CBCT evaluation shows no statistical difference between the PRF-autogenous bone complex group and the bovine bone-collagen membrane complex regarding volume change of the augmented bone with a 16% rate of bone loss following a 6-month healing period. Also, a slight increase in bone thickness has been seen when liquid PRF is used. In sinus floor elevation, results revealed no differences in graft volume between PRF group and control group at any of the evaluated time points. Although higher implant stability immediately postoperatively, higher new bone formation, the lesser amount of residual graft and earlier implant placement. Conclusion: Platelet Rich-Fibrin is widely accepted for use in periodontal surgery and dentistry due to its minimally invasive nature and low risk of adverse effects, with positive results in tissue regeneration. There is evidence that PRF leads to improved and faster healing, as well as cost-effective regenerative procedures compared to other treatments.
文摘Aim: To evaluate the effects based the changes on ultrasound and on magnetic resonance for knee osteoarthritis treatment by platelet-rich plasma therapy in combination with mesenchymal stem cell from autologous adipose tissue. Objects and Methods: 30 patients, 26 females, 4 males, mean age 58.63 ± 11.11, mean disease duration 5.3 ± 4.6 years, respectively 60 knee joints were diagnosed with osteoarthritis at stage II - III according to the Kellgren and Lawrence classifications. After ultrasound and magnetic resonance imaging in the first time, all patients were injected with platelet-rich plasma combined with mesenchymal stem cells from autologous adipose tissue into both knee joints. Results: After treatment 12 months by platelet-rich plasma injection combined with mesenchymal stem cells from autologous adipose tissue: The thickness of articular cartilage on ultrasound increased significantly from 2.08 ± 0.36 mm to 2.48 ± 0.36 mm with p Conclusion: The treatment of knee osteoarthritis by platelet-rich plasma combined with mesenchymal stem cells from autologous adipose tissue was effective in improving cartilage thickness on ultrasound and magnetic resonance, thereby improving the motor function of the knee joint.
文摘Administration of platelet rich plasma(PRP) and bone marrow aspirate concentrate(BMAC) has shown some promise in the treatment of neurological conditions;however, there is limited information on combined administration. As such, the purpose of this study was to assess safety and functional outcomes for patients administered combined autologous PRP and BMAC for spinal cord injury(SCI). This retrospective case series included seven patients who received combined treatment of autologous PRP and BMAC via intravenous and intrathecal administration as salvage therapy for SCI. Patients were reviewed for adverse reactions and clinical outcomes using the Oswestry Disability Index(ODI) for up to 1 year, as permitted by availability of follow-up data. Injury levels ranged from C3 through T11, and elapsed time between injury and salvage therapy ranged from 2.4 months to 6.2 years. Post-procedure complications were mild and rare, consisting only of self-limited headache and subjective memory impairment in one patient. Four patients experienced severe disability prior to PRP combined with BMAC injection, as evidenced by high(> 48/100) Oswestry Disability Index scores. Longitudinal Oswestry Disability Index scores for two patients with incomplete SCI at C6 and C7, both of whom had cervical spine injuries, demonstrated a decrease of 28–40% following salvage therapy, representing an improvement from severe to minimal disability. In conclusion, intrathecal/intravenous co-administration of PRP and BMAC resulted in no significant complications and may have had some clinical benefits. Larger clinical studies are needed to further test this method of treatment for patients with SCI who otherwise have limited meaningful treatment options. This study was reviewed and approved by the Ohio Health Institutional Review Board(IRB No. 1204946) on May 16, 2018.
文摘Background:Platelet rich plasma(PRP) therapy is widely used in enhancing the recovery of skeletal muscle from injury.However,the impact of intramuscular delivery of PRP on hematologic and biochemical responses has not been fully elucidated in exercise-induced muscle damage.The purpose of this investigation the effects of intramuscular delivery of PRP on hematologic and biochemical responses and recovery strategy muscle damage induced by high intensity muscle exercise(exercise-induced muscle damage,EIMD).Methods:Moderately active male volunteers participated in this study and were assigned to a control group(control,n = 6) and PRP administration group(PRP,n = 6).The subjects performed exercise with a load of 80% one repetition maximum(1RM) maximal voluntary contraction of the elbow flexors until point of exhaustion of the non-dominant arm was reached.The arms were treated with saline or autologous PRP post-24 h EIMD.Venous blood samples were obtained in the morning to establish a baseline value and 1–4 days post-exercise and were analyzed for serum ferritin,iron,iron binding capacity(IBC),creatinine kinase(CK),lactate dehydrogenase(LDH),aspartate aminotransferase(AST),and alanine aminotransferase(ALT).Results:The baseline levels of plasma iron,ferritin,IBC,CK,LDH,AST,and ALT were similar in both the control and PRP groups.However,24-h following exercise a significant increase in these parameters was observed in both groups between 1 and 4 days during the recovery period.Interestingly,PRP administration decreased plasma iron levels compared to the control on the second day post-exercise.Plasma IBC increased in PRP group from Days 2 to 4 post-exercise compared to the control group whilst PRP administration had no effect on plasma ferritin,CK,AST,ALT,or LDH.Conclusion:Acute exhaustive exercise increased muscle damage markers,including plasma iron,IBC,and ferritin levels,indicating muscle damage induced by exercise.PRP administration improves inflammation by reversing the increase in the iron levels post-exercise without displaying any myotoxicity and may have a role to play in the recovery of exercise-induced muscle damage.
基金partly supported by grants from Agencia Nacional de Promoción Científica y Tecnológica(PICT 2013-2335)SeCTyP K013(Universidad Nacional de Cuyo)to Claudio M.Fader.
文摘Autophagy is an essential cellular homeostatic mechanism by which intracellular components are delivered into the lysosomes for degradation and recycling.Autophagy has been related with a diversity of pathological or physiological dentary processes such as bone remodeling,skeletal aging,osteoclastogenesis,osteoblastogenesis and different types of oral cancer.Platelet-rich plasma(PRP),isolated from autologous blood,is a plasma preparation containing a higher concentration of platelets which contains numerous different growth factors and cytokines that activate several cellular signaling cascades.The purpose of this study is to investigate the effect of PRP on autophagy stimulation in both osteoblast precursor 3T3-L1 and non-related osteoblastic cells.Our results showed that PRP can increase the number of autophagic structures in 3T3-L1 and HeLa(cervical cancer cells)cells.Moreover,we have determined by Western blot a rise in the lipidated form of the autophagic protein LC3(i.e.LC3-II)upon PRP treatment.Taken together,our results suggest that PRP is able to induce a strongly autophagy response in osteoblast precursor and,to a lesser extent,in non-related osteoblastic cells,suggesting that PRP could be a potential therapeutic tool for some autophagy-related diseases associated with bone homeostasis.
基金NSFC(No.8177431081804095)Shanghai technology and development fund(No.16401902200)
文摘Diabetic foot ulcer,as a common complication of diabetes,is a difficult problem in clinical practice.As a new therapeutic method,platelet rich plasma has the functions of anti-inflammatory,bacteriostasis,microcirculation reconstruction,cell proliferation and differentiation,cell apoptosis reduction,peripheral nerve repair and so on.It can promote tissue repair and ulcer healing at every stage of diabetic foot ulcer.This article reviews the preparation of platelet rich plasma,the mechanism of action,the treatment of diabetic foot ulcer,the existing problems and the future development.
文摘BACKGROUND Anastomotic leak constitutes a major problem in abdominal surgery.Technical insufficiency,topical or systemic factors contribute to disrupted healing of the performed bowel anastomosis and result in anastomosis leakage,with detrimental effects on patient postoperative outcomes.Despite the investigation of several factors and the invention of protective materials,the ideal agent to prevent anastomotic leaks is yet to be determined.AIM To study the effect of platelet rich plasma(PRP)on the healing of bowel anastomoses.METHODS A systematic literature search was performed in PubMed,EMBASE,and Scopus databases to identify studies investigating the effect of PRP application on bowel anastomosis.RESULTS Eighteen studies were eligible with a total population of 712 animals including rats(14 studies),rabbits(2 studies)and pigs(2 studies).No postoperative complications were reported following PRP application.Fourteen out of 18 studies reported a statistically significant higher anastomosis bursting pressure in PRP groups compared to control either in healthy animals or animal models with underlying condition or intervention,such as intraperitoneal chemotherapy or peritonitis.Similar results were reported by ten studies in terms of tissue hydroxyproline levels.One study reported significant increase in collagen deposition in PRP groups.PRP application resulted in significantly decreased inflammatory cell infiltration in the presence of peritonitis or intraperitoneal chemotherapy(6 studies).CONCLUSION The application of PRP is associated with improved bowel anastomosis outcomes,especially in animal models having an underlying condition affecting the normal healing process.PRP application seems to augment the normal healing process under these circumstances.However,further studies are needed to investigate the potential role of PRP on bowel anastomosis healing,especially in clinical settings.
文摘Cystitis often appears even in absence of bacteria colonization. Trigonitis and interstitial inflammation are the most common morphological features of abacterial cystitis in young and post menopausal women. Arterial obstructive disease and bladder ischemia might play an important role in bladder dysfunction. Activated inflammatory cells produce ROS (radicals of oxygen), NF kB seems involved in ROS synthesis. Clinical studies have indicated that high CO2 levels can impact upon peripheral tissue, reducing ischaemia, responsible of recurrent inflammation and consequently reducing oxydative phenomena. PRP (platelet-rich plasma) is a volume of fractionated plasma from the patient's own blood that contains platelet concentrate rich of alpha granules. PRP interacts tissue repair mechanisms by placing supra-physiological concentrations of autologous platelets at the site of tissue damage. This study proposes a single PRP transvaginal injection followed by 10 weekly applications of carboxytherapy, using subcutaneous injections of sterile CO2 gas. We have selected 6 Women (50-75 years), affected by recurrent abacterial cystitis with Pain and urge incontinence. All patients showed a subjective sensible reduction of symptoms. After 2 months all patients have neither inflammatory symptoms nor endoscopic evidence of trigonitis. Preliminary qualitative results could encourage the use of carboxytherapy and PRP in treatment of abacterial and interstitial cystitis.
文摘Osteoarthritis(OA)is a complex"whole joint"disease pursued by inflammatory mediators,rather than purely a process of"wear and tear".Besides cartilage degradation,synovitis,subchondral bone remodeling,degeneration of ligaments and menisci,and hypertrophy of the joint capsule take parts in the pathogenesis.Pain is the hallmark symptom of OA,but the extent to which structural pathology in OA contributes to the pain experience is still not well known.For the knee OA,intraarticular(IA)injection(corticosteroids,viscosupplements,blood-derived products)is preferred as the last nonoperative modality,if the other conservative treatment modalities are ineffective.IA corticosteroid injections provide short term reduction in OA pain and can be considered as an adjunct to core treatment for the relief of moderate to severe pain in people with OA.IA hyaluronic acid(HA)injections might have efficacy and might provide pain reduction in mild OA of knee up to 24 wk.But for HA injections,the costeffectiveness is an important concern that patients must be informed about the efficacy of these preparations.Although more high-quality evidence is needed,recent studies indicate that IA platelet rich plasma injections are promising for relieving pain,improving knee function and quality of life,especially in younger patients,and in mild OA cases.The current literature and our experience indicate that IA injections are safe and have positive effects for patient satisfaction.But,there is no data that any of the IA injections will cause osteophytes to regress or cartilage and meniscus to regenerate in patients with substantial and irreversible bone and cartilage damage.
文摘The use of PRP involves a complex network of molecular events which accelerate tissue regenera-tion due to its richness in growth factors plus a variety of biologic mediators. Several communica-tions tell us about its usefulness on the dental implantology field, plastic surgery, orthopedics and peripheral nerve regeneration after trauma. We have presented our successful experience of its use in pneumology when treating severe hemoptysis, respiratory fistulae, spontaneous pneumothorax and one tracheal rupture. In this article we present two cases of post intubation tracheal rupture successfully treated with the local instillation of PRP on one of them and with the injection of PRP along the lips of the tracheal wound on the other. Tracheal rupture is a rare but life threatening complication of emergency intubation requiring an effective response in order to avoid the risk of patient death due to secondary mediastinitis and sepsis. Up to now there is no general consensus in the treatment of this condition and alternatives in use are not universally accepted. The use of local autologous PRP in our experience has demonstrated a favorable performance in such cases, turning it in a highly promising tool for the treatment of conditions such as this, in which a rapidly effective and minimally invasive handling is required.
文摘Platelet-rich plasma (PRP) has been used as a therapeutic tool to promote wound healing, in orthopedics, dermatology, oral surgery, etc. However, the mechanisms underlying the wound healing effects of PRP remain unclear. The purpose of this study was to evaluate the effectiveness of applying PRP, particularly in the management of tooth extraction sockets. Three upper molars of Fischer rats were extracted, and blood was drawn from the hearts of other rats to prepare PRP. The PRP was activated and applied to the bone defects of the experimental group, and nothing was applied to the bone defects of the control group. On day 3, fibrin network and granulation tissue, which are abundant in blood capillaries, were seen under the PRP layer in the experimental group. On the other hand, only inflammatory cells and a fibrin network were observed in the bone defects of the control group. On day 7, granulation tissue was seen in the bone defects in both the control group and experimental group, although excavation of granulation tissue was noted in the control group. The results demonstrated the presence of a rich fibrin network and early inflammatory reactions in the experimental group, which may lead to rise of thick, vessel-rich granulation tissue. The application of PRP may stimulate wound healing in tooth extraction bone defects, and PRP may confer some beneficial effects on the outcomes.
文摘Carpal tunnel release is one of the most common and surgery procedures performed. Complications and recurrence of the condition can occur up to 20% of cases. We describe a technique of utilizing the nanofat and platelet rich plasma to successfully enhance healing and minimize risk of recurrence after endoscopic carpal tunnel release. This patient had exceptionally fast recovery, resuming work in one day and excellent grip strength and a full functioning level at his two-week follow-up. After one year he continues to demonstrate a complete resolution of symptoms and full function without any evidence of recurrence or complications.
文摘Introduction: Leukocyte and platelet-rich fibrin (L-PRF) is an emerging material in dentistry, however, there are controversies surrounding its effectiveness. Despite the amount of literature available, debates regarding its effect continue. This review aims to summarize and clarify the data surrounding the use of L-PRF in promoting the healing of extraction sockets, which may offer a better outcome for future treatments. Purpose: The purpose of this review is to evaluate the current literature on the use of L-PRF in promoting the healing of extraction sockets, and to provide a comprehensive overview of the available evidence. Methods: A comprehensive computer-based search of databases such as PubMed, Medline, and Cochrane Library was conducted. Results: The results of this review suggest that L-PRF has shown promise in promoting early healing of extraction sockets, but the evidence for its effectiveness over a longer period is limited. Conclusion: Although L-PRF has shown promising results in the early healing periods, its effectiveness over a longer healing period cannot be confirmed based on the available data. More clinical trials with standardized protocols and consistent measurement methods are needed to establish the role of L-PRF in enhancing the healing of extraction sockets.
文摘Objective: To explore the effect of Bismuth Subgallate/Borneol (Suile<sup>TM</sup> BSB) healing dressing combined with autologous platelet-rich gel (APG) in the treatment of diabetic foot ulcer (DFU). Methods: A total of 120 patients with DFU hospitalized in the Changsha Central Hospital from August 2020 to September 2021 were selected and randomly divided into an experimental group (BSB + APG, n = 60) and a control group (BSB, n = 60) according to random number table method. The total therapeutic effect, healing time, hospital stay, level indexes of various inflammatory factors before and after treatment and ulcer area were observed in the two groups. Results: The total effect of the control group was worse than that of the experimental group, and the data between the two groups were significant (P 0.05);after treatment, the levels of inflammatory factors including WBC, CRP, IL-6 and TNF-α in the control group were higher than those in the experimental group, and there was significant difference between the two groups (P 0.05);after 14 days of treatment, the ulcer area in the control group was larger than that in the experimental group, and the data between the two groups were significant (P Conclusion: BSB combined with APG can achieve better therapeutic effect, reduce the inflammatory reaction of patients, and promote wound healing in the treatment of patients with diabetic foot ulcer.
文摘Objective: To evaluate the efficacy based on clinical symptom and on magnetic resonance image of platelet-rich plasma therapy in combination with mesenchymal stem cells from autologous adipose tissue for knee osteoarthritis treatment. Patients and Method: 30 patients including 26 females and 4 males;correspondingly, 60 knee joints were diagnosed with osteoarthritis with stages II - III of Kellgren and Lawrence, their mean age was 58.63 ± 11.11. All were injected with autologous platelet-rich plasma that was extracted by PRP set, APC 30 PRP PRCEDURE PRAK and autologously extracted mesenchymal stem cells from abdominal adipose tissue using the ADI-25-01 ADIPOSEPRCEDURE PRAK of USA. Results: After 12 months: the pain level according to VAS score at the right knee joint was decreased from 6.0 ± 1.28 before treatment to 1.9 ± 0.3;VAS score at the left knee joint was decreased from 6.43 ± 1.19 to 2.25 ± 0.43. Total Lequene score at right knee joint was decreased from 16.04 ± 1.57 before treatment to 4.31 ± 1.04, at left knee joint was decreased from 17.52 ± 1.74 before treatment to 5.15 ± 1.48. Total WOMAC score at right knee joint was decreased from 55.93 ± 5.56 to 10.37 ± 1.56;at left knee joint was decreased from 53.97 ± 5.57 to 10.07 ± 1.59. There were 86.77% joints with cartilage thickness change and the patellar cartilage thickness was increased from 1.56 ± 0.09 mm before treatment to 1.65 ± 0.09 mm. Conclusion: The treatment of knee osteoarthritis by platelet-rich plasma therapyin combination with mesenchymal stem cells from autologous adipose tissue is effective in reducing pain, improving patient's mobility and walking function, reforming articular cartilage thickness on magnetic resonance image.
基金the National Natural Science Foundation of China(No.30600616).
文摘The aim of this study was to investigate the effect of platelet-rich plasma(PRP)on cavernous nerve(CN)regeneration and functional status in a nerve-crush rat model.Twenty-four Sprague-Dawley male rats were randomly divided into three equal groups:eight had a sham operation,eight underwent bilateral nerve crushing with no further intervention and eight underwent bilateral nerve crushing with an immediate application of PRP on the site of injury.Erectile function was assessed by CN electrostimulation at 3 months and nerve regeneration was assessed by toluidine blue staining of CN and nicotinamide adenine dinucleotide phosphate(NADPH)-diaphorase staining of penile tissue.Three months after surgery,in the group that underwent bilateral nerve crushing with no further intervention,the functional evaluation showed a lower mean maximal intracavernous pressure(ICP)and maximal ICP per mean arterial pressure(MAP)with CN stimulation than those in the sham group.In the group with an immediate application of PRP,the mean maximal ICP and maximal ICP/MAP were significantly higher than those in the injured control group.Histologically,the group with the application of PRP had more myelinated axons of CNs and more NADPH-diaphorase-positive nerve fibres than the injured control group but fewer than the sham group.These results show that the application of PRP to the site of CN-crush injury facilitates nerve regeneration and recovery of erectile function.Our research indicates that clinical application of PRP has potential repairing effect on CN and peripheral nerves.
文摘Several studies demonstrated the favorable effects of platelet rich plasma(PRP)on the skin and promoted its wide use in clinical practice.The growth factors stored in platelet alfa-granules allow for the tissue regeneration and the main fields of application of PRP in current clinical practice are the cartilage and musculoskeletal defects,osteoarthritis and other bone disorders,chronic and difficult to heal wounds,and aesthetic procedures.The relevant number of different PRP preparation protocols may explain the inconsistency of the different clinical outcomes reported in the literature.Despite the technological advances in PRP preparation,the objective assessment of the clinical efficacy of PRP from the literature reports still is difficult due to the low homogeneity of the samples in terms of both inclusion criteria and size.Therefore,it might be useful to establish standardized and reproducible experimental models to confirm and objectively measure the effectiveness of the available clinical results.Many experimental investigations have been carried out to objectively assess the effectiveness of PRP and platelet gel on several tissues.As far as the skin is concerned,the studies carried out to date are limited to fibroblasts in in-vitro culture models or to collagen,vascular supply,epithelium,and hair follicle in in-vivo models.The skin,however,is a very complex organ,where different cell lines coexist and feature complex mutual interaction.A model that combines the advantages of both in-vitro and in-vivo cultures is the ex-vivo model.The demonstration of the platelet derived growth factors effects through the ex-vivo human full-thickness skin culture model is a keystone to support the evidence of the PRP effectiveness,as it represents an objective,fast,reproducible,and ethical investigational method.
文摘<b>Context and Aim:</b> Mesenchymal stem cells (MSCs) and platelet-rich fibrin (PRF) have emerged as ideal candidates for advanced therapies of various therapeutically-challenging diseases;however, their regenerative potential in diabetic foot ulcers (DFU) has not been well determined. In this study, we reviewed our clinical experience in mitigating chronic ulcer complications of diabetic foot through a conventional treatment of autologous adipose-derived MSCs embedded in PRF with pure PRF injections. <b>Materials and Methods:</b> The present study was carried out in 10 patients with an open DFU wound selected over a period of 1 year starting from April 2019. Patients were either injected with PRF alone (Group A) or injected with MSCs derived from adipose tissue (ADMSC) embedded in (PRF (Group B). <b>Results:</b> Patients in Group B had a better healing index when compared to Group A. <b>Conclusion:</b> Use of ADMSC embedded in PRF showed promising results to treat DFU.