Regenerative Potential Of Platelet-rich Plasma Research Articles

Accelerating wound healing: Unveiling synergistic effects of P25/SWCNT/Ag and P25/rGO/Ag nanocomposites within PRP-gelatin scaffold, highlighting the synergistic antimicrobial activity.

Wound healing is a multifaceted biological process requiring innovative strategies to enhance efficiency and counter infections. In this groundbreaking study, we investigate the regenerative potential of platelet-rich plasma (PRP) integrated into a gelatin (GLT) scaffold along with nanocomposites of titanium dioxide (TiO2) (P25)/single-walled carbon nanotubes (SWCNTs)/Ag and P25/reduced graphene oxide (rGO)/Ag. Incorporating these advanced materials into the PRP/GLT delivery system aims to optimize the controlled release of growth factors (GFs) and leverage the exceptional properties of nanomaterials for enhanced tissue repair and wound healing outcomes. Antioxidant activity assessment using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity reveals the superior performance of P25/SWCNTs/Ag compared to P25/rGO/Ag. Their synergistic effects are evaluated in conjunction with antibacterial and antifungal antibiotics. Furthermore, the wound healing potential of P25/SWCNTs/Ag and P25/rGO/Ag, combined with PRP/GLT, is examined. Notably, both nanocomposites exhibit promising synergistic effects with gentamicin and fluconazole against pathogenic strains. Significantly, the inclusion of non-activated PRP substantially augments the wound healing efficacy of P25/SWCNTs/Ag on days 3 (p<0.01) and 15 (p<0.05). These findings pave the way for advanced wound dressing and therapeutic interventions, capitalizing on the synergistic effects of PRP and nanomaterials, thus ultimately benefiting patients and advancing regenerative medicine.

Regenerative effects of platelet-rich plasma releasate injection in rabbit discs degenerated by intradiscal injection of condoliase

BackgroundIntradiscal condoliase injection is an alternative therapeutic option for lumbar disc herniation (LDH). However, it is often associated with disc degeneration. Several in vivo studies have demonstrated the regenerative potential of platelet-rich plasma (PRP) in disc degeneration. Thus, we hypothesized that the intradiscal injection of PRP releasate (PRPr), a soluble releasate isolated from PRP, has the potential to regenerate degenerated intervertebral discs (IVDs) induced by condoliase. This study examined the regenerative effects of PRPr on rabbit IVDs degenerated following condoliase injection.MethodsEleven New Zealand white rabbits were used in this study. Condoliase (12.5 mU/10 μl) was injected into two non-contiguous discs (L2-L3 and L4-L5), and L3-L4 disc was left intact as a non-injection control. Saline (20 μl) or PRPr (20 μl) was randomly injected into L2-L3 and L4-L5 discs 4 weeks after the condoliase injection. Disc height (DH) was radiographically monitored biweekly from the day of condoliase injection to 16 weeks post-injection. Changes in DH were expressed as percentage DH (%DH) normalized to the baseline DH. Sixteen weeks after condoliase injection, all rabbits were euthanized, and subjected to MRI and histological analyses.ResultsIntradiscal injection of condoliase induced a significant decrease in %DH (L2-L3 and L4-L5) to 52.0% at week 4. However, the %DH began to return to normal after saline injection and reached 76.3% at week 16. In the PRPr group, %DH began to recover to normal after the PRPr injection and was restored to 95.5% at week 16. The MRI-modified Pfirrmann grade of the PRPr group was significantly lower than that of the saline group (P < 0.01). Histological analyses showed progressive degenerative changes, including reduction of the NP area and condensation of the matrix in the saline and PRPr groups. The histological score of the PRPr group was significantly lower than that of the saline group (P < 0.01).ConclusionsPRPr has great potential to enhance the regeneration of degenerated rabbit IVDs induced by condoliase. The results of this preclinical study suggest that PRPr injection therapy may be indicated for patients with LDH who have poor recovery from disc degeneration after chemonucleolysis treatment with condoliase.

Histological Assessment of The Regenerative Potential of Platelet-Rich Plasma for Severe Vocal Fold Scar in A Rat Model

Histological Assessment of The Regenerative Potential of Platelet-Rich Plasma for Severe Vocal Fold Scar in A Rat Model

MP56-09 HISTOMORPHOLOGICAL ANALYSIS OF THE REGENERATIVE POTENTIAL OF PLATELET-RICH PLASMA DURING URETHROPLASTY (IN AN EXPERIMENTAL MODEL)

You have accessJournal of UrologyTrauma/Reconstruction/Diversion: Urethral Reconstruction (including Stricture, Diverticulum) III (MP56)1 Sep 2021MP56-09 HISTOMORPHOLOGICAL ANALYSIS OF THE REGENERATIVE POTENTIAL OF PLATELET-RICH PLASMA DURING URETHROPLASTY (IN AN EXPERIMENTAL MODEL) Sergey Kotov, and Mikhail Iritsyan Sergey KotovSergey Kotov More articles by this author , and Mikhail IritsyanMikhail Iritsyan More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000002086.09AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Reconstructive plastic surgery is the gold standard for the treatment of primary urethral strictures, but the effectiveness of these methods does not reach 100%. In cases of recurrent urethral strictures, the effectiveness of standard operations is lower than in primary strictures, which requires the search for methods to improve the results of surgical treatment. To evaluate changes in the structure of the intercellular matrix, the cellular composition of the spongiose body, and the regenerative potential of platelet-rich plasma after urethroplasty on a biological model. METHODS: The experiment was performed on male rabbits of the breed "Burgundy" weighing 3.0-4.5 kg (18 individuals). Two groups of animals were formed: experimental (9 individuals) and control (9 individuals). All animals in each group underwent end-to-end anastomotic plasty of the bulbous urethra according to the standard procedure. In the control group, an isotonic solution of 0.9% NaCl was injected into the spongy body in the anastomosis zone; in the experimental group, autologous plasma enriched with platelets was administered. Routine hematoxylin-eosin staining was performed to visualize the histoarchitectonics of the tissues. Van Gieson staining to identify the collagen fibers and correct their orientation. In order to detail the inflammatory and regenerative changes, an additional immunohistochemical study was performed with antibodies: CD79a, CD43, CD31 (PECAM1), MMP1, MMP9. The expression level of MMP1, MMP9 was evaluated by counting positive cells in the submucosal and muscle layers. The level of angiogenesis in micro-preparations was estimated by counting the number of vessels, and reliable endothelial imaging was performed using CD31(PECAM1) expression. RESULTS: The local application of platelet-rich plasma in the suture zone contributes to a reduction in the zone of necrotic changes and the severity of inflammation, accelerated migration of macrophage-histiocyte cells to the focus of alteration, and increased blood supply due to enhanced angiogenesis. Also, in the experimental samples, there was a higher expression of metalloproteinases (collagenases) of type 1 and 9, reduced collagen production, and correct orientation of collagen fibers during the repair processes. CONCLUSIONS: According to the results of the experiment, the use of platelet-rich plasma promotes the acceleration of reparative processes in the spongy body after urethroplasty. In clinical practice, this may reduce the duration of lower urinary tract drainage and, consequently, the risk of infectious complications. In turn, the expression of metalloproteinases and a decrease in collagen production, the correct orientation of collagen fibers can reduce the amount of pathological fibrous-scar tissue in the surgical area, which reduces the risk of recurrence of urethral stricture after surgical treatment in clinical practice. Source of Funding: None © 2021 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 206Issue Supplement 3September 2021Page: e972-e972 Advertisement Copyright & Permissions© 2021 by American Urological Association Education and Research, Inc.MetricsAuthor Information Sergey Kotov More articles by this author Mikhail Iritsyan More articles by this author Expand All Advertisement Loading ...

P0384 - Histomorphological analysis of the regenerative potential of platelet-rich plasma during urethroplasty (in an experimental model)

P0384 - Histomorphological analysis of the regenerative potential of platelet-rich plasma during urethroplasty (in an experimental model)

Use of Platelet Rich Plasma in the Management of Periodontal Intra-Osseous Defects: A Clinical Study.

Background:Periodontal disease is characterized by the presence of gingival inflammation, periodontal pocket formation, loss of connective tissue attachment, and alveolar bone around the affected tooth. Alveolar bone support and attachment apparatus regeneration has been achieved through various processes and have given elusive results. An expedient and cost-effective approach to obtain autologous platelet-derived growth factor (PDGF) and transforming growth factor (TGF)-β is the use of platelet-rich plasma (PRP). PRP is obtained by sequestrating and concentrating platelets by gradient density centrifugation.Aims:The current study was aimed at evaluating the regenerative potential of platelet-rich plasma in comparison with open flap debridement.Settings and Designs:This study was a randomized controlled clinical trial conducted in the Department of Periodontics and Oral Implantology, KIDS, Bhubaneswar, Odisha.Materials and Methods:Twenty periodontal infrabony defects in 10 patients; 6 males and 4 females of age between 25–45 years were included in this study and were followed up for a period of 6 months.Statistical Analysis:Both the groups showed a mean plaque index of 2.10 and 2.50 at baseline, 1.75 and 2.05 at 3 months, and 1.28 and 1.53 at the end of 6 months. The mean reduction of 0.35 and 0.45 at three months and 0.82 and 0.97 at six months was achieved, which was statistically significant. (P < 0.001). When comparison was done between the two groups it was not found to be statistically significant (P < 0.05). In each of the group there was definitive reduction in plaque score over a period of time.Results and Conclusion:There was no statistically significant difference in the treatment outcome between open flap debridement and PRP alone. Platelet-rich plasma application holds promise and needs further exploration.

Platelet autologous growth factors decrease the osteochondral regeneration capability of a collagen-hydroxyapatite scaffold in a sheep model

BackgroundCurrent research aims to develop innovative approaches to improve chondral and osteochondral regeneration. The objective of this study was to investigate the regenerative potential of platelet-rich plasma (PRP) to enhance the repair process of a collagen-hydroxyapatite scaffold in osteochondral defects in a sheep model.MethodsPRP was added to a new, multi-layer gradient, nanocomposite scaffold that was obtained by nucleating collagen fibrils with hydroxyapatite nanoparticles. Twenty-four osteochondral lesions were created in sheep femoral condyles. The animals were randomised to three treatment groups: scaffold, scaffold loaded with autologous PRP, and empty defect (control). The animals were sacrificed and evaluated six months after surgery.ResultsGross evaluation and histology of the specimens showed good integration of the chondral surface in both treatment groups. Significantly better bone regeneration and cartilage surface reconstruction were observed in the group treated with the scaffold alone. Incomplete bone regeneration and irregular cartilage surface integration were observed in the group treated with the scaffold where PRP was added. In the control group, no bone and cartilage defect healing occurred; defects were filled with fibrous tissue. Quantitative macroscopic and histological score evaluations confirmed the qualitative trends observed.ConclusionsThe hydroxyapatite-collagen scaffold enhanced osteochondral lesion repair, but the combination with platelet growth factors did not have an additive effect; on the contrary, PRP administration had a negative effect on the results obtained by disturbing the regenerative process. In the scaffold + PRP group, highly amorphous cartilaginous repair tissue and poorly spatially organised underlying bone tissue were found.

Buffered Platelet-Rich Plasma Enhances Mesenchymal Stem Cell Proliferation and Chondrogenic Differentiation

The success of tissue engineering applications can potentially be dramatically improved with the addition of adjuncts that increase the proliferation and differentiation of progenitor or stem cells. Platelet-rich plasma (PRP) has recently emerged as a potential biologic tool to treat acute and chronic tendon disorders. The regenerative potential of PRP is based on the release of growth factors that occurs with platelet rupture. Its autologous nature gives it a significant advantage in tissue engineering applications. To test whether PRP may be useful specifically for cartilage regeneration, a cell culture experiment was devised in which mesenchymal stem cells (MSCs) were grown in control media or media enhanced with inactivated, buffered PRP. Proliferation 7 days after PRP treatment was increased: 1.041 versus 0.199 for the control media cells ( p<0.001). The messenger RNA (mRNA) level of the osteogenic marker RUNX2 was 52.84 versus 26.88 for the control group ( p<0.005). Likewise the mRNA level of the chondrogenic markers Sox-9 and aggrecan was 29.74 versus 2.29 for the control group ( p<0.001) and 21.04 versus 1.93 ( p<0.001), respectively. These results confirm that PRP enhances MSC proliferation and suggest that PRP causes chondrogenic differentiation of MSC in vitro.

Platelet‐rich plasma activity on maxillary sinus floor augmentation by autologous bone

This work aims to evaluate the regenerative potential of platelet-rich plasma (PRP) on an implant site of peculiar clinical impact, such as sinus augmentation. Sixteen consenting patients (11 females and five males), with symmetrical maxillary sinus atrophy, underwent bilateral sinus floor augmentation, using autologous (iliac crest) bone on one side and PRP plus autologous bone contralaterally. Implants were inserted 4, 5, 6 and 7 months after surgery in the patients randomly split into four groups. Orthopantomographies, computed tomography with transverse image digital reconstructions and densitometries were used to monitor the treatment progress. A core biopsy was performed at the site of implant. Clinical performance across both sites showed no statistical significance (P=0.414). Densitometric values were higher at PRP sites (mean Hounsfield units approximately +57%), even if densitometry converged in the two sites 8 months after surgery. Histology documents enhanced bone activities in sites treated with PRP, 4 months after surgery. Reduced bone activity was observed in both sites 5, 6 and 7 months after surgery. Bone amount, higher in sites treated with PRP (mean trabecular bone volume approximately +37%), decreased in both sites over time. Our results seem to indicate a certain regenerative potential of PRP when used with autologous bone. The effect of this enhancement of bone regeneration appeared to be restricted to shorter treatment times. A progressive extinguishment of the PRP effect is recorded after an interval longer than 6-7 months.