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Prp effect

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https://www.readbyqxmd.com/read/28922143/leukocyte-reduced-platelet-rich-plasma-stimulates-the-in-vitro-proliferation-of-adipose-tissue-derived-mesenchymal-stem-cells-depending-on-pdgf-signaling
#1
Siegmund Lang, Marietta Herrmann, Christian Pfeifer, Gero Brockhoff, Johannes Zellner, Michael Nerlich, Peter Angele, Lukas Prantl, Sebastian Gehmert, Markus Loibl
BACKGROUND: Platelet-rich Plasma (PRP) is suggested as xenoprotein-free cell-culture medium replacement for animal-derived supplements. OBJECTIVE: The aim of this study was to investigate PRP-triggered signaling in adipose derived mesenchymal stem cells (ASCs). METHODS: PRP was obtained from 4 male patients. We incubated ASCs in α-MEM with different Platelet derived growth factor (PDGF) subtypes or 10% or 20% pooled PRP or 20% fetal calf serum (FCS) prior to determination of the S-phase fraction (SPF)...
September 11, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28910420/role-of-the-central-lysine-cluster-and-scrapie-templating-in-the-transmissibility-of-synthetic-prion-protein-aggregates
#2
Bradley R Groveman, Gregory J Raymond, Katrina J Campbell, Brent Race, Lynne D Raymond, Andrew G Hughson, Christina D Orrú, Allison Kraus, Katie Phillips, Byron Caughey
Mammalian prion structures and replication mechanisms are poorly understood. Most synthetic recombinant prion protein (rPrP) amyloids prepared without cofactors are non-infectious or much less infectious than bona fide tissue-derived PrPSc. This effect has been associated with differences in folding of the aggregates, manifested in part by reduced solvent exclusion and protease-resistance in rPrP amyloids, especially within residues ~90-160. Substitution of 4 lysines within residues 101-110 of rPrP (central lysine cluster) with alanines (K4A) or asparagines (K4N) allows formation of aggregates with extended proteinase K (PK) resistant cores reminiscent of PrPSc, particularly when seeded with PrPSc...
September 14, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28902452/mgrn1-mediated-ubiquitination-of-%C3%AE-tubulin-regulates-microtubule-dynamics-and-intracellular-transport
#3
Rukmini Mukherjee, Priyanka Majumder, Oishee Chakrabarti
MGRN1 mediated ubiquitination of α-tubulin regulates microtubule stability and mitotic spindle positioning in mitotic cells. This study elucidates the effect of MGRN1 mediated ubiquitination of α-tubulin in interphase cells. Here, we show that MGRN1 mediated ubiquitination regulates dynamics of EB1 labelled plus ends of microtubules. Intracellular transport of mitochondria and endosomes are affected in cultured cells where functional MGRN1 is depleted. Defects in microtubule-dependent organellar transport are evident in cells where noncanonical K6 mediated ubiquitination of α-tubulin by MGRN1 is compromised...
September 13, 2017: Traffic
https://www.readbyqxmd.com/read/28900383/effects-of-platelet-rich-plasma-and-chondrocyte-co-culture-on-msc-chondrogenesis-hypertrophy-and-pathological-responses
#4
Rouhallah Ramezanifard, Mahboubeh Kabiri, Hana Hanaee Ahvaz
Regarding the inadequate healing capability of cartilage tissue, cell-based therapy is making the future of cartilage repair and regeneration. Mesenchymal stem cells (MSC) have shown great promise in cartilage regeneration. However, a yet-unresolved issue is the emergence of hypertrophic and pathologic markers during in vitro MSC chondrogenesis. Articular chondrocytes (AC) can suppress the undesired hypertrophy when co-cultured with MSC. On the other hand, platelet rich plasma (PRP), is considered potentially effective for cartilage repair and in-vitro chondrogenesis...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28900035/prion-protein-is-required-for-tumor-necrosis-factor-alpha-tnf%C3%AE-triggered-nuclear-factor-kappa-b-nf-%C3%AE%C2%BAb-signaling-and-cytokine-production
#5
Gui-Ru Wu, Tian-Chen Mu, Zhen-Xing Gao, Jun Wang, Man-Sun Sy, Chao-yang Li
The expression of normal cellular prion protein (PrP) is required for the pathogenesis of prion diseases. However, the physiological functions of PrP remain ambiguous. Here, we identified PrP as being critical for tumor necrosis factor (TNF)α-triggered signaling in a human melanoma cell line, M2, and a pancreatic ductal cell adenocarcinoma cell line, BxPC-3. In M2 cells, TNFα upregulates the expression of p-I-kappa-B-kinase α/β (p-IKKα/β), p-p65, and p-JNK, but downregulates the IκBα protein, all of which are downstream signaling intermediates in the TNF receptor signaling cascade...
September 12, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28886194/a-new-rabbit-model-of-impaired-wound-healing-in-an-x-ray-irradiated-field
#6
Kazutoshi Fujita, Soh Nishimoto, Toshihiro Fujiwara, Yohei Sotsuka, Maki Tonooka, Kenichiro Kawai, Masao Kakibuchi
Radiation is an important therapy for cancer with many benefits; however, its side effects, such as impaired wound healing, are a major problem. While many attempts have been made to overcome this particular disadvantage, there are few effective treatments for impaired wound healing in an X-ray-irradiated field. One reason for this deficiency is the lack of experimental models, especially animal models. We have previously reported a mouse model of impaired wound healing in which the irradiation area was restricted to the hindlimbs...
2017: PloS One
https://www.readbyqxmd.com/read/28874781/immunization-of-cervidized-transgenic-mice-with-multimeric-deer-prion-protein-induces-self-antibodies-that-antagonize-chronic-wasting-disease-infectivity-in-vitro
#7
Dalia H Abdelaziz, Simrika Thapa, Basant Abdulrahman, Li Lu, Shikha Jain, Hermann M Schatzl
Chronic wasting disease (CWD) is the most contagious prion disease. It is expanding rapidly in North America, was found recently in Europe, and the potential for transmission to humans cannot be excluded yet. We hypothesized that it is possible to prevent peripheral CWD infection and CWD prion shedding by inducing auto-antibodies against the cellular prion protein (PrP(C)) by active vaccination. Our objective is to overcome self-tolerance against PrP by using a multimeric recombinant PrP (recPrP) as an immunogen...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28873284/platelet-rich-plasma-ultrasound-guided-injection-in-the-treatment-of-carpal-tunnel-syndrome-a-placebo-controlled-clinical-study
#8
M-A Malahias, V S Nikolaou, E O Johnson, M-K Kaseta, S-T Kazas, G C Babis
PURPOSE: To demonstrate whether and to what extent a single injection of Platelet-Rich Plasma (PRP), under ultrasound guidance, can improve the clinical symptoms of patients with a mild to moderate carpal tunnel syndrome (CTS). METHODS: We conducted a prospective, randomized, clinical study including 50 patients suffering from mild to moderate CTS for a minimum duration of 3-months. Patients were randomly divided into two groups: A (26 patients) received an ultrasound-guided PRP injection into the carpal tunnel, whereas Group B (24 patients) was injected with placebo (0...
September 5, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28861792/a-quick-method-to-evaluate-the-effect-of-the-amino-acid-sequence-in-the-misfolding-proneness-of-the-prion-protein
#9
Natalia Fernández-Borges, Hasier Eraña, Saioa R Elezgarai, Chafik Harrathi, Vanesa Venegas, Joaquín Castilla
Prion diseases or transmissible spongiform encephalopathies (TSEs) are a group of neurodegenerative diseases where the misfolding of the prion protein (PrP) is a crucial event. Based on studies in TSE-affected humans and the generation of transgenic mouse models overexpressing different mutated versions of the PrP, we conclude that both wild-type and mutated PrPs exhibit differential propensity to misfold in vivo. Here, we describe a new method in vitro to assess and quantify the PrP misfolding phenomenon in order to better understand the molecular mechanisms involved in this process...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28859737/techniques-for-optimizing-surgical-scars-part-1-wound-healing-and-depressed-atrophic-scars
#10
Sailesh Konda, Kathryn Potter, Vicky Zhen Ren, Apphia Lihan Wang, Aditya Srinivasan, Suneel Chilukuri
Surgical management of benign or malignant cutaneous tumors may result in noticeable scars that are of great concern to patients, regardless of sex, age, or ethnicity. Techniques to optimize surgical scars are discussed in this three-part review. In part 1, an overview of the importance of preoperative planning, intraoperative technique, and pathophysiology of wound healing is followed by a discussion of scar revision options for depressed/atrophic scars. Scar revision options for these scars include dermabrasion, needling and subcision, punch excision and grafts, fillers, nonablative fractional lasers, ablative and fractional ablative lasers, and platelet-rich plasma (PRP)...
2017: Skinmed
https://www.readbyqxmd.com/read/28853968/evaluation-of-autologous-platelet-rich-plasma-plus-ablative-carbon-dioxide-fractional-laser-in-the-treatment-of-acne-scars
#11
Ahmed Mohammed Abdel Aal, Ibrahim Maeraj Ibrahim, Nevein Ahmed Sami, Ibrahim Mohammed Abdel Kareem
INTRODUCTION: Acne scar is a common distressing complication of acne vulgaris. CO2 laser resurfacing proved effective for treatment of such problem but the associated complications may limit its use. Platelet rich plasma (PRP) may increase the chance of favorable outcome. AIM OF THE WORK: To evaluate the synergistic effects of autologous PRP with fractional CO2 laser resurfacing in treatment of acne scars among Egyptian patients. PATIENTS AND METHOD: This study included 30 patients suffering from post-acne scars...
August 30, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28853913/comparison-of-the-effects-of-osteochondral-autograft-transplantation-with-platelet-rich-plasma-or-platelet-rich-fibrin-on-osteochondral-defects-in-a-rabbit-model
#12
Masahiro Maruyama, Hiroshi Satake, Tomoto Suzuki, Ryusuke Honma, Yasushi Naganuma, Yuya Takakubo, Michiaki Takagi
BACKGROUND: Although osteochondral autograft transplantation (OAT) provides satisfactory outcomes for osteochondral defects, for large defects OAT is often inadequate because of graft availability. Osteochondral allograft transplantation is an alternative treatment for large defects, but this approach is limited by graft storage constraints and carries disease transmission risks. Platelet-rich fibrin (PRF) is a second-generation platelet concentrate, and its positive effect on articular cartilage has been reported...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28852294/a-spilt-head-study-of-efficacy-of-placebo-versus-platelet-rich-plasma-injections-in-the-treatment-of-androgenic-alopecia
#13
Dilip Kachhawa, Gauri Vats, Durgesh Sonare, Pankaj Rao, Sandeep Khuraiya, Rohit Kataiya
BACKGROUND: Platelet-rich plasma (PRP) is an autologous concentration of human platelets contained in a small volume of plasma with haemostatic and tissue repairing effects. Being enriched by various growth factors, PRP has become the focus of attention in numerous fields of medicine. Androgenic alopecia (AGA) is a common chronic hair loss disorder, characterised by progressive hair loss. Despite the therapeutic options available, there is low patient compliance and satisfaction rate...
April 2017: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/28843722/macrophage-cell-derived-exosomes-staphylococcal-enterotoxin-b-against-fibrosarcoma-tumor
#14
Elham Behzadi, Hamideh Mahmoodzadeh Hosseini, Raheleh Halabian, Abbas Ali Imani Fooladi
Targeted immune therapies are a modern approach to harness the immunity to treat cancer patients. Exosomes (EXOs) are nano-vesicles used for drug delivery in cancer treatment. We aimed to assess the effectiveness of novel designed EXO structures for immunotherapy alone and in combination with other components in animal models. EXO derived from untreated macrophage (EXO), WEHI-164 cell lysate treated EXO (EXOLys), HSP70 enriched WEHI-164 cell lysate treated EXO (EXOHSP70), Naloxone (NLX) treated EXO (EXONLX), Propranolol (PRP) treated EXO (EXOPRP) and staphylococcal enterotoxin B (SEB) anchored to three kinds of EXOs designated as EXO/SEB, EXOLys/SEB, EXOHSP70/SEB were purified from J774 cell line...
August 24, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28842494/cellular-prion-protein-targets-amyloid-%C3%AE-fibril-ends-via-its-c-terminal-domain-to-prevent-elongation
#15
Erin Bove-Fenderson, Ryo Urano, John E Straub, David A Harris
Oligomeric forms of the amyloid-β (Aβ) peptide are thought to represent the primary synaptotoxic species underlying the neurodegenerative changes seen in Alzheimer's disease. It has been proposed that the cellular prion protein (PrP(C)) functions as a cell-surface receptor, which binds to Aβ oligomers and transduces their toxic effects. However, the molecular details of the PrP(C)-Aβ interaction remain uncertain. Here, we investigated the effect of PrP(C) on polymerization of Aβ under rigorously controlled conditions in which Aβ converts from a monomeric to a fibrillar state via a series of kinetically defined steps...
August 23, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28838676/understanding-the-effect-of-disease-related-mutations-on-human-prion-protein-structure-insights-from-nmr-spectroscopy
#16
Ivana Biljan, Gregor Ilc, Janez Plavec
Prion diseases or transmissible spongiform encephalopathies constitute a group of fatal neurodegenerative diseases that can be of sporadic, genetic, or acquired origin. The central molecular event of prion diseases is the conformational conversion of the physiological cellular prion protein, PrP(C), into a disease-associated form known as prion or PrP(Sc). Spontaneous generation of prions in genetic prion diseases is caused by mutations in the human prion protein gene (PRNP). Understanding of the earliest conformational changes during misfolding of PrP(C) in genetic forms of prion diseases may benefit from detailed structural characterization of various human (Hu) PrP variants...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28838661/transmission-and-replication-of-prions
#17
Alba Marín-Moreno, Natalia Fernández-Borges, Juan C Espinosa, Olivier Andréoletti, Juan M Torres
Transmissible spongiform encephalopathies (TSEs) are a group of progressive, invariably fatal diseases that affect the nervous system of many mammals including humans. The key molecular event in the pathogenesis of TSEs is the conversion of the cellular prion protein PrP(C) into a disease-associated isoform PrP(Sc). The "protein-only hypothesis" argues that PrP(Sc) itself is the infectious agent. In effect, PrP(Sc) can adopt several structures that represent different prion strains. The interspecies transmission of TSEs is difficult because of differences between the host and donor primary PrP sequence...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28838657/structural-modeling-of-human-prion-protein-s-point-mutations
#18
Giulia Rossetti, Paolo Carloni
Prion diseases, or transmissible spongiform encephalopathies, are a group of rare fatal neurodegenerative maladies that affect humans and animals. The main event in disease progression is the posttranslational conversion of the ubiquitously expressed cellular form of the prion protein (PrP(C)) into its misfolded and pathogenic isoform, known as prion or PrP(Sc). In the presence of specific disease-linked mutations, the conversion may occur spontaneously. Molecular simulation studies on human PrP(C) wild-type and variants from several research groups, including ours, have provided a consistent picture of the effect of such mutations...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28835493/prp-p102l-and-nearby-lysine-mutations-promote-spontaneous-in-vitro-formation-of-transmissible-prions
#19
Allison Kraus, Gregory J Raymond, Brent Race, Katrina J Campbell, Andrew G Hughson, Kelsie J Anson, Lynne D Raymond, Byron Caughey
Accumulation of fibrillar protein aggregates is a hallmark of many diseases. While numerous proteins form fibrils by prion-like seeded polymerization in vitro, only some are transmissible and pathogenic in vivo To probe the structural features that confer transmissibility to prion protein (PrP) fibrils, we have analyzed synthetic PrP amyloids with or without the human prion disease-associated P102L mutation. The formation of infectious prions from PrP molecules in vitro has required cofactors and/or unphysiological denaturing conditions...
August 23, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28835207/adverse-events-following-immunization-with-pentavalent-vaccine-experiences-of-newly-introduced-vaccine-in-iran
#20
Manoochehr Karami, Pegah Ameri, Jalal Bathaei, Zeinab Berangi, Tahereh Pashaei, Ali Zahiri, Seyed Mohsen Zahraei, Hussein Erfani, Koen Ponnet
BACKGROUND: The most important factors that affect the incidence of vaccine-related complications are the constituent biological components of the vaccine, injection site reactions, age and sex. The aim of this study is to determine the incidence rate of adverse events following immunization with pentavalent vaccine (DTPw-Hep B-Hib (PRP-T) vaccine (pentavac) (adsorbed) is manufactured by Serum Institute of India ltd), which was introduced in Iran in November 2014. It is important to monitor vaccine-related adverse events because of the role of vaccine safety in immunization program success...
August 23, 2017: BMC Immunology
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