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https://www.readbyqxmd.com/read/28823090/epidural-patch-with-autologous-platelet-rich-plasma-a-novel-approach
#1
Berrin Gunaydin, Muberra Acar, Gokcen Emmez, Didem Akcali, Nil Tokgoz
We aimed to perform an epidural patch using platelet rich plasma (PRP), which has the potential to regenerate and heal tissues via degranulation of platelets, in a 34-year-old parturient suffering from persistent post-dural puncture headache (PDPH) after failed epidural blood patch (EBP). After her admission to our unit, we reconfirmed the clinical and radiologic diagnosis of PDPH. Cranial MRI with contrast showed diffuse pachymeningeal thickening and contrast enhancement with enlarged pituitary consistent with intracranial hypotension...
August 19, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28823058/polyurethane-gelatin-nanofibrils-neural-guidance-conduit-containing-platelet-rich-plasma-and-melatonin-for-transplantation-of-schwann-cells
#2
Majid Salehi, Mahdi Naseri-Nosar, Somayeh Ebrahimi-Barough, Mohammdreza Nourani, Arash Khojasteh, Saeed Farzamfar, Korosh Mansouri, Jafar Ai
The current study aimed to enhance the efficacy of peripheral nerve regeneration using a biodegradable porous neural guidance conduit as a carrier to transplant allogeneic Schwann cells (SCs). The conduit was prepared from polyurethane (PU) and gelatin nanofibrils (GNFs) using thermally induced phase separation technique and filled with melatonin (MLT) and platelet-rich plasma (PRP). The prepared conduit had the porosity of 87.17 ± 1.89%, the contact angle of 78.17 ± 5.30° and the ultimate tensile strength and Young's modulus of 5...
August 19, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28822989/cellular-prion-protein-enhances-drug-resistance-of-colorectal-cancer-cells-via-regulation-of-a-survival-signal-pathway
#3
Jun Hee Lee, Chul Won Yun, Sang Hun Lee
Anti-cancer drug resistance is a major problem in colorectal cancer (CRC) research. Although several studies have revealed the mechanism of cancer drug resistance, molecular targets for chemotherapeutic combinations remain elusive. To address this issue, we focused on the expression of cellular prion protein (PrP(C)) in 5-FU-resistant CRC cells. In 5-FU-resistant CRC cells, PrP(C) expression is significantly increased, compared with that in normal CRC cells. In the presence of 5-FU, PrP(C) increased CRC cell survival and proliferation by maintaining the activation of the PI3K-Akt signaling pathway and the expression of cell cycle-associated proteins, including cyclin E, CDK2, cyclin D1, and CDK4...
August 21, 2017: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/28822903/uterine-clinical-findings-fertility-rate-leucocyte-migration-and-cox-2-protein-levels-in-the-endometrial-tissue-of-susceptible-mares-treated-with-platelet-rich-plasma-before-and-after-ai
#4
Lorenzo G Segabinazzi, Aime M Friso, Sebastian B Correal, André M Crespilho, José Antonio Dell'Aqua, Jordi Miró, Frederico O Papa, Marco Antonio Alvarenga
Persistent mating-induced endometritis (PMIE) results in decreased fertility in horses, thereby causing a significant impact in the horse market. Platelet-rich plasma (PRP), a modulator of the inflammatory response, has been largely used in veterinary medicine. Here, we investigated the effects of PRP on uterine inflammation, conception rate, endometrial polymorphonuclear neutrophil (PMN) migration, and COX-2 protein levels in the endometrial tissue. Thirteen PMIE-susceptible mares were used for artificial insemination (AI)...
August 12, 2017: Theriogenology
https://www.readbyqxmd.com/read/28821618/region-specific-protein-misfolding-cyclic-amplification-reproduces-brain-tropism-of-prion-strains
#5
Nicolas Privat, Etienne Levavasseur, Serfildan Yildirim, Samia Hannaoui, Jean-Philippe Brandel, Jean-Louis Laplanche, Vincent Béringue, Danielle Seilhean, Stéphane Haïk
Human prion diseases such as Creutzfeldt-Jakob disease are transmissible brain proteinopathies, characterized by the accumulation of a misfolded isoform of the host cellular prion protein (PrP) in the brain. According to the prion model, prions are defined as proteinaceous infectious particles composed solely of this abnormal isoform of PrP (PrPSc). Even in the absence of genetic material, various prion strains can be propagated in experimental models. They can be distinguished by the pattern of disease they produce and especially by the localization of PrPSc deposits within the brain and the spongiform lesions they induce...
August 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28820136/protective-effect-of-val129-prp-against-bovine-spongiform-encephalopathy-but-not-variant-creutzfeldt-jakob-disease
#6
Natalia Fernández-Borges, Juan Carlos Espinosa, Alba Marín-Moreno, Patricia Aguilar-Calvo, Emmanuel A Asante, Tetsuyuki Kitamoto, Shirou Mohri, Olivier Andréoletti, Juan María Torres
Bovine spongiform encephalopathy (BSE) is the only known zoonotic prion that causes variant Creutzfeldt-Jakob disease (vCJD) in humans. The major risk determinant for this disease is the polymorphic codon 129 of the human prion protein (Hu-PrP), where either methionine (Met129) or valine (Val129) can be encoded. To date, all clinical and neuropathologically confirmed vCJD cases have been Met129 homozygous, with the exception of 1 recently reported Met/Val heterozygous case. Here, we found that transgenic mice homozygous for Val129 Hu-PrP show severely restricted propagation of the BSE prion strain, but this constraint can be partially overcome by adaptation of the BSE agent to the Met129 Hu-PrP...
September 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28819567/systemic-associations-with-residual-subretinal-fluid-after-ranibizumab-in-diabetic-macular-edema
#7
Meng-Ju Tsai, Yi-Ting Hsieh, Elizabeth P Shen, Yi-Jie Peng
PURPOSE: To investigate the impact of systemic diseases on the occurrence of subretinal fluid (SRF) in diabetic macular edema (DME) and prognostic factors for residual SRF following three consecutive monthly intravitreal ranibizumab. METHODS: Ninety-seven eyes from 68 patients with DME who completed 3 consecutive monthly injections of ranibizumab were enrolled. Systemic parameters mainly included chronic kidney disease (CKD), hypertension, HbA1c, and insulin dependence...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28817974/applications-of-the-real-time-quaking-induced-conversion-assay-in-diagnosis-prion-strain-typing-drug-pre-screening-and-other-amyloidopathies
#8
Niccolò Candelise, Matthias Schmitz, Susana Margarida da Silva Correia, Aman Arora, Anna Villar-Piqué, Saima Zafar, Franc Llorens, Maria Cramm, Inga Zerr
The development of in vitro protein misfolding amplification assays for the detection and analysis of abnormally folded proteins, such as proteinase K resistant prion protein (PrP(res)) was a major innovation in the prion field. In prion diseases, these types of assays imitate the pathological conversion of the cellular PrP (PrP(C)) into a proteinase resistant associated conformer or amyloid, called PrP(res). Areas covered: The most prominent protein misfolding amplification assays are the protein misfolding cyclic amplification (PMCA), which is based on sonication and the real-time quaking-induced conversion (RT-QuIC) technique based on shaking...
August 18, 2017: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/28815297/leukocyte-reduced-platelet-rich-plasma-increases-proliferation-of-tenocytes-treated-with-prednisolone-a-cell-cycle-analysis
#9
Franz Hilber, Markus Loibl, Siegmund Lang, Maximilian Kerschbaum, Gero Brockhoff, Peter Angele, Johannes Zellner, Paul Schmitz, Michael Nerlich, Michael Worlicek
INTRODUCTION: The purpose of this study was to evaluate the effect of allogenic leukocyte-reduced platelet-rich plasma on human tenocytes after treatment with prednisolone and to develop a standardization of its application for clinical practice. METHODS: A leukocyte-reduced PRP was produced using the Arthrex Double Syringe (Arthrex, Inc., Naples, FL, USA), in a modified single-spin separation method. Human tenocytes were isolated from discarded rotator cuff segments...
August 16, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28815175/platelet-rich-plasma-an-elixir-for-treatment-of-alopecia-personal-experience-on-117-patients-with-review-of-literature
#10
REVIEW
Suruchi Garg, Shweta Manchanda
Platelet-rich plasma (PRP) has emerged as a new treatment modality in regenerative plastic surgery and dermatology. PRP is a simple, cost-effective and feasible treatment option with high patient satisfaction for hair loss and can be regarded as a valuable adjuvant treatment modality for androgenic alopecia and other types of non-scarring alopecias. Authors have proposed a hair model termed "Golden anchorage with 'molecular locking' of ectodermal and mesenchymal components for survival and integrity of hair follicle (HF)" in this article...
2017: Stem Cell Investigation
https://www.readbyqxmd.com/read/28814578/genetic-human-prion-disease-modelled-in-prp-transgenic-drosophila
#11
Alana M Thackray, Alzbeta Cardova, Hanna Wolf, Lydia Pradl, Ina Vorberg, Walker S Jackson, Raymond Bujdoso
Inherited human prion diseases, such as FFI and familial CJD (fCJD), are associated with autosomal dominant mutations in the human prion protein gene PRNP and accumulation of PrPSc, an abnormal isomer of the normal host protein PrPC, in the brain of affected individuals. PrPSc is the principal component of the transmissible neurotoxic prion agent. It is important to identify molecular pathways and cellular processes that regulate prion formation and prion-induced neurotoxicity. This will allow identification of possible therapeutic interventions for individuals with, or at risk from, genetic human prion disease...
August 16, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28809826/high-throughput-screening-for-protein-based-inheritance-in-s-cerevisiae
#12
James S Byers, Daniel F Jarosz
The encoding of biological information that is accessible to future generations is generally achieved via changes to the DNA sequence. Long-lived inheritance encoded in protein conformation (rather than sequence) has long been viewed as paradigm-shifting but rare. The best characterized examples of such epigenetic elements are prions, which possess a self-assembling behavior that can drive the heritable manifestation of new phenotypes. Many archetypal prions display a striking N/Q-rich sequence bias and assemble into an amyloid fold...
August 8, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28809630/aplikace-plazmy-obohacen%C3%A3-o-trombocyty-a-leukocyty-k-later%C3%A3-ln%C3%A3-mu-epikondylu-humeru
#13
P Walder, L Paša, L Pavliska
PURPOSE OF THE STUDY The aim of the study was to evaluate the safety and efficacy of the application of platelet- and leukocyte-rich plasma (L-PRP) in the treatment of lateral humeral epicondyle (ERH) as compared to the administration of corticosteroid therapy. MATERIAL AND METHODS It was a prospective, double-blind and randomized clinical trial. It included a total of 25 cases of ERH in 23 patients aged 18 to 60 years. They were divided into two arms: L-PRP arm with 10 cases and corticosteroid arm with 15 cases...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28806294/the-tissue-engineered-tendon-bone-interface-in-vitro-and-in-vivo-synergistic-effects-of-adipo-derived-stem-cells-platelet-rich-plasma-and-extracellular-matrix-hydrogel
#14
Rory McGoldrick, Arhana Chattopadhyay, Christopher Crowe, Grace Chiou, Kenneth Hui, Simon Farnebo, Christopher Davis, Anais Le Grand, Molly Jacobs, Hung Pham, James Chang
INTRODUCTION: Suboptimal healing of the tendon bone interface (TBI) remains an unsolved problem. One solution is a biocompatible tissue engineered construct that promotes augmented healing. We hypothesisze that 1.) the presence of Platelet Rich Plasma (PRP) and prolonged in vitro incubation produces tissue engineered tendon bone interface scaffolds with greater reseeding of viable Adipo-derived Stem Cells (ADSC) and 2.) when implanted with extracellular matrix hydrogel, constructs will display superior in vivo strength repair and biocompatibility...
August 3, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28806095/a-midterm-evaluation-of-postoperative-platelet-rich-plasma-injections-on-arthroscopic-supraspinatus-repair-a-randomized-controlled-trial
#15
Jay R Ebert, Allan Wang, Anne Smith, Robert Nairn, William Breidahl, Ming Hao Zheng, Timothy Ackland
BACKGROUND: Platelet-rich plasma (PRP) has been applied as an adjunct to rotator cuff repair to improve tendon-bone healing and potentially reduce the incidence of subsequent tendon retears. PURPOSE: To investigate whether the midterm clinical and radiographic outcomes of arthroscopic supraspinatus repair are enhanced after repeated postoperative applications of PRP. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. METHODS: A total of 60 patients (30 control; 30 PRP) were initially randomized to receive 2 ultrasound-guided injections of PRP to the tendon repair site at 7 and 14 days after double-row arthroscopic supraspinatus repair or not...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28805478/production-of-platelet-rich-plasma-gel-from-elderly-patients-under-antithrombotic-drugs-perspectives-in-chronic-wounds-care
#16
M Velier, J Magalon, A Daumas, M Cassar, P Francois, A Ghazouane, C Philandrianos, B Bertrand, C Frere, D Bernot, P Villani, F Dignat George, F Sabatier
Platelet-Rich Plasma (PRP) is an autologous biological therapy obtained by centrifuging the patient's own blood to concentrate platelets. The addition of autologous thrombin and calcium chloride to PRP allows the production of a semi-solid form called PRP gel. PRP gel is increasingly used in a variety of tissue defects and predominantly in the management of non-healing chronic wounds. The topical application of PRP gel seems promising due to the capability of platelets to store and secrete growth factors (GF), fibrin and cytokines, which are essentials for wound healing...
August 14, 2017: Platelets
https://www.readbyqxmd.com/read/28804999/diversity-of-astroglial-responses-across-human-neurodegenerative-disorders-and-brain-aging
#17
Isidro Ferrer
Astrogliopathy refers to alterations of astrocytes occurring in diseases of the nervous system, and it implies the involvement of astrocytes as key elements in the pathogenesis and pathology of diseases and injuries of the central nervous system. Reactive astrocytosis refers to the response of astrocytes to different insults to the nervous system, whereas astrocytopathy indicates hypertrophy, atrophy/degeneration and loss of function and pathological remodeling occurring as a primary cause of a disease or as a factor contributing to the development and progression of a particular disease...
September 2017: Brain Pathology
https://www.readbyqxmd.com/read/28804849/ristocetin-induced-platelet-aggregation-ripa-and-ripa-mixing-studies
#18
Juan Pablo Frontroth, Emmanuel J Favaloro
Ristocetin-induced platelet aggregation (RIPA) is used as an in vitro test to determine the presence and integrity of the platelet glycoprotein (GP) Ibα-V-IX complex and von Willebrand factor (VWF) interaction and is usually performed using platelet-rich plasma (PRP). Impairment in the response of VWF/GPIbα-V-IX is measured with reference to several established concentrations of ristocetin and may indicate defects in VWF or in GPIbα-V-IX function. RIPA-based mixing studies comprise an additional approach to testing this interaction to help define whether defects identified by RIPA lie in VWF or in GPIbα-V-IX...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28803906/viscosupplementation-for-hip-osteoarthritis-a-systematic-review-and-meta-analysis-of-the-efficacy-for-pain-disability-and-adverse-events
#19
REVIEW
Victor Figueiredo Leite, João Eduardo Daud Amadera, Anna Maria Buehler
OBJECTIVE: To assess the efficacy of viscosupplementation (HA) in hip osteoarthritis (OA) pain, disability and adverse events. DATA SOURCES: Pubmed, EMBASE, Cochrane Library, ClinicalTrials.gov database and specific journals up to March 2017. STUDY SELECTION: Randomized controlled trials comparing HA with any other intra-articular injection. DATA EXTRACTION: Performed according to Cochrane/GRADE criteria. Two authors extracted data, assessed risk of bias and quality of evidence...
August 10, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28800967/role-of-prion-protein-in-premature-senescence-of-human-fibroblasts
#20
Emmanuelle Boilan, Virginie Winant, Elise Dumortier, Benaissa ElMoualij, Pascale Quatresooz, Heinz D Osiewacz, Florence Debacq-Chainiaux, Olivier Toussaint
Prion protein (PrP) is essentially known for its capacity to induce neurodegenerative prion diseases in mammals caused by a conformational change in its normal cellular isoform (PrP(C)) into an infectious and disease-associated misfolded form, called scrapie isoform (PrP(Sc)). Although its sequence is highly conserved, less information is available on its physiological role under normal conditions. However, increasing evidence supports a role for PrP(C) in the cellular response to oxidative stress. In the present study, a new link between PrP and senescence is highlighted...
August 8, 2017: Mechanisms of Ageing and Development
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