Platelet-rich plasma inhibits Wnt/β-catenin signaling in rabbit cartilage cells activated by IL-1β

Abstract

Objective: Platelet-rich plasma (PRP) has been reported to alleviate degenerative pathological damage to joint cartilage. This study aimed to investigate the effect of PRP on Wnt/β-catenin signaling in rabbit chondrocytes.

Methods: Using 3-month-old New Zealand white rabbits, PRP was prepared from venous blood, and chondrocytes were cultured from knee joint cartilage and identified by staining for type II collagen and proteoglycan. The effects of PRP on chondrocyte viability were measured. The chondrocytes were divided into 5 groups: control, IL-1β, PRP (100-fold dilution), Dkk-1 (100 ng/mL) and Dkk-1 + PRP. The IL-1β, PRP, Dkk-1 and Dkk-1 + PRP groups were treated with interleukin (IL)-1β (50 μL, 10 μg/mL) for24 h. Chondrocyte morphology was observed by electron microscopy. Levels of carboxy terminal peptide (CTX-II) and cartilage oligomeric matrix protein (COMP) in culture media were measured by ELISA. Wnt-1, β-catenin and GSK-3β mRNA and protein expression were determined by RT-PCR and western blot respectively.

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Treating de querveins tensynovitis using the prp technique : a case series

Abstract

PRP is the acronym for platelet rich plasma, an autologous, biological blood derived product which is exogenously applied to tissue areas where regeneration or healing is desired. Together with the platelets, high concentration of essential growth factors is harvested, and these includes platelet-derived growth factors (PDGF), vascular endothelial growth factors (VEGF), interleukin-like factors (IGF), fibronectin to name but a few , which is thought to enhance repair. First described in 1987 with success in an open heart surgery in Italy, PRP has found its fame and is now widely used in many areas of specialty, including sports medicine for treatment of musculoskeletal injuries, orthopedics for enhancement of bone healing, osteoarthritis, aesthetics medicine where ladies and men alike inject PRP onto their faces to increase radiance and reduce wrinkles, and as recent as 2013 in the field of urology to treat organic erectile dysfunction. The potential of PRP treatment is limitless, with many upcoming large scale studies backing its success. Principles of its application include obtaining a platelet concentrate 3-5 times its normal physiological levels and injecting it into areas where healing is desired.

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Freeze-Dried Chitosan-PRP Injectable Surgical Implants for Meniscus Repair: Pilot Feasibility Studies in Ovine Models

Abstract

Clinical management of meniscus tears often involves partial meniscectomy, which can lead to Osteoarthritis (OA). Meniscus repair augmentation strategies are being developed to compensate for the tissue’s limited healing response. The purpose of the study was to assess the feasibility of using implants composed of freeze-dried Chitosan (CS) solubilized in Platelet-Rich Plasma (PRP) to improve meniscus repair in ovine models. Lyophilized formulations containing 1% (w/v) chitosan (degree of deacetylation 82% and number average molar mass 38 kDa), 1% (w/v) trehalose and 42.2 mM calcium chloride were solubilized in autologous PRP and applied to surgically induced meniscus lacerations.

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Platelet-rich plasma has beneficial effects in mice with osteonecrosis of the femoral head by promoting angiogenesis

Abstract

Platelet-rich plasma (PRP) is autologous and multifunctional. Platelet concentrate from blood contains highly concentrated platelets and various types of cells, including growth factors. PRP promotes the recovery of cell proliferation and differentiation. Osteonecrosis of the femoral head is a disease caused by femoral head damage or an insufficient blood supply, which leads to the death of bone cells and abnormal bone marrow composition. The subsequent repair of bone cells may result in changes to the structure of femoral head, femoral head collapse and joint dysfunction. PRP may promote the repair of injured articular cartilage in patients with joint diseases through the removal of harmful inflammatory factors. In the present study, the therapeutic effects and primary mechanism of PRP action were investigated using a glucocorticoid‑induced femoral head osteonecrosis mouse model.

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Ultrasound-Guided Platelet-Rich Plasma Injection in a Patient with a Plantar Fascia Tear

Abstract

Department of Physical Medicine and Rehabilitation, Ankara Physical Medicine and Rehabilitation Training and Research Hospital, Ankara, Turkey.

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Injectable-platelet rich fibrin using the low speed centrifugation concept improves cartilage regeneration when compared to platelet-rich plasma

Abstract

The aim of the present study was to evaluate the effect of injectable platelet-rich fibrin (i-PRF) on cultivated chondrocytes and osteochondral regeneration in critical-sized osteochondral defect of the rabbit’s knee in comparison to autologous platelet-rich plasma (PRP). Chondrocytes were first investigated for their ability to proliferate and differentiate in response to PRP and i-PRF. Thereafter, full-thickness critical-sized osteochondral defects 5 mm in diameter and 5 mm in depth were created in the knee joint of 12 adult female New Zealand White rabbits. Defects were regenerated with either PRP or i-PRF and compared to control. Animals were sacrificed at 4 and 12 weeks postoperatively and evaluated histologically by macroscopic and microscopic examination for cartilage regeneration. i-PRF significantly promoted chondrocyte proliferation and mRNA levels of Sox9, collagen type II, and aggrecan when compared to PRP and control.

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Happy holidays from Dr Weglein Office

happy holidays from Dr Weglein Office

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Men and Women Differ in the Biochemical Composition of Platelet-Rich Plasma

Abstract

Background: Autologous platelet-rich plasma (PRP) is widely used for a variety of clinical applications. However, clinical outcome studies have not consistently shown positive effects. The composition of PRP differs based on many factors. An improved understanding of factors influencing the composition of PRP is important for the optimization of PRP use.

Conclusion: This study in healthy patients shows differences in the composition of PRP between men and women, with sex being a greater factor than age. There was also proteomic variability within the groups. These data support a personalized approach to PRP treatment and highlight the need for a greater understanding of the relationships between proteomic factors in PRP and clinical outcomes.

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The use of lumbar epidural injection of platelet lysate for treatment of radicular pain

Abstract

Background: Epidural steroid injections (ESI) are the most common pain management procedure performed in the US, however evidence of efficacy is limited. In addition, there is early evidence that the high dose of corticosteroids used can have systemic side effects. We describe the results of a case series evaluating the use of platelet lysate (PL) epidural injections for the treatment of lumbar radicular pain as an alternative to corticosteroids.

Methods: Registry data was obtained for patients (N = 470) treated with PL epidural injections presenting with symptoms of lumbar radicular pain and MRI findings that were consistent with symptoms. Collected outcomes included numeric pain score (NPS), functional rating index (FRI), and a modified single assessment numeric evaluation (SANE) rating.

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Role of leukocyte free platelet rich plasma in planter fasciitis: a prospective study

Abstract

Background: Planter fasciitis, is by definition, inflammation of planter fascia. Most of the cases are well treated conservatively and a few responds to surgery only. Objectives of present study were evaluating the efficacy of a single injection of leukocyte free platelet rich plasma in plantar fasciitis and to derive a correlation between the clinical and radiological outcome.

Methods: The present study consisted of 120 patients of bilateral (PF), (240 feet). These patients were divided into two groups PRP group of 60 patients and Placebo group of 60 patients. The study was conducted on patients attending Orthopaedics outpatient department Post Graduate Institute of Medial Education and Research (PGIMER) from July 2011 to June 2012. A primary efficacy criterion was changes from baseline in pain using (VAS). Functional results, level of satisfaction and outcome were measured by – AOFAS Foot Scale. Correlation of clinical with radiological outcome were performed.

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