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Platelet lysate

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https://www.readbyqxmd.com/read/28990195/comparative-analyses-of-industrial-scale-human-platelet-lysate-preparations
#1
Jan Pierce, Eric Benedetti, Amber Preslar, Pam Jacobson, Ping Jin, David F Stroncek, Jo-Anna Reems
BACKGROUND: Efforts are underway to eliminate fetal bovine serum from mammalian cell cultures for clinical use. An emerging, viable replacement option for fetal bovine serum is human platelet lysate (PL) as either a plasma-based or serum-based product. STUDY DESIGN AND METHODS: Nine industrial-scale, serum-based PL manufacturing runs (i.e., lots) were performed, consisting of an average ± standard deviation volume of 24.6 ± 2.2 liters of pooled, platelet-rich plasma units that were obtained from apheresis donors...
October 8, 2017: Transfusion
https://www.readbyqxmd.com/read/28970801/polyphosphate-in-neonates-less-shedding-from-platelets-and-divergent-prothrombotic-capacity-due-to-lower-tfpi-levels
#2
Axel Schlagenhauf, Harald Haidl, Sina Pohl, Eva-Christine Weiss, Bettina Leschnik, Siegfried Gallistl, Wolfgang Muntean
Background: The neonatal hemostatic system exhibits a fragile balance featuring lower levels of clotting factors as well as inhibitors. Neonatal platelets show in-vitro hypoaggregability, but neonates exhibit well-functioning primary and secondary hemostasis despite this impairment. Recently, polyphosphate shed by activated platelets has been shown to induce a prothrombotic shift on the plasmatic coagulation system of adults. The impact of platelet derived polyphosphate might differ in neonates due to aforementioned peculiarities...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28941176/optimized-human-platelet-lysate-as-novel-basis-for-a-serum-xeno-and-additive-free-corneal-endothelial-cell-and-tissue-culture
#3
Daniel Thieme, Lynn Reuland, Toni Lindl, Friedrich Kruse, Thomas Fuchsluger
INTRODUCTION: The expansion of donor derived corneal endothelial cells is a promising approach for regenerative therapies in corneal diseases. To achieve the best GMP standard the entire cultivation process should be devoid of non-human components. However, so far there is no suitable xeno-free protocol for clinical applications. METHODS: We therefore introduce a processed variant of a platelet lysate for the use in corneal cell and tissue culture based on a GMP-grade thrombocyte concentrate...
September 21, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28939367/comparison-of-three-human-platelet-lysates-used-as-supplements-for-in-vitro-expansion-of-corneal-endothelium-cells
#4
Tsung-Jen Wang, Ming-Sheng Chen, Ming-Li Chou, Hsiu-Chen Lin, Jerard Seghatchian, Thierry Burnouf
BACKGROUND: Human platelet lysates (HPLs) are emerging as the new gold standard supplement of growth media for ex vivo expansion of cells for transplant. However, variations do exist in the way how HPLs are prepared. In particular, uncertainties still exist regarding the type of HPL most suitable for corneal endothelium cells (CEC) expansion, especially as these cells have limited proliferative capacity. MATERIAL AND METHODS: Three distinct HPL preparations were produced, with or without calcium chloride/glass beads activation, and with or without heat treatment at 56°C for 30min...
August 31, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28931468/platelet-released-growth-factors-inhibit-proliferation-of-primary-keratinocytes-in-vitro
#5
Andreas Bayer, Mersedeh Tohidnezhad, Rouven Berndt, Sebastian Lippross, Peter Behrendt, Tim Klüter, Thomas Pufe, Holger Jahr, Jochen Cremer, Franziska Rademacher, Maren Simanski, Regine Gläser, Jürgen Harder
Autologous thrombocyte concentrate lysates as platelet-released growth factors (PRGF) or Vivostat Platelet Rich Fibrin (PRF(®)) represent important tools in modern wound therapy, especially in the treatment of chronic, hard-to-heal or infected wounds. Nevertheless, underlying cellular and molecular mechanisms of the beneficial clinical effects of a local wound therapy with autologous thrombocyte concentrate lysates are poorly understood. Recently, we have demonstrated that PRGF induces antimicrobial peptides in primary keratinocytes and accelerates keratinocytes' differentiation...
September 18, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28916182/erratum-to-overcoming-the-bottleneck-of-platelet-lysate-supply-in-large-scale-clinical-expansion-of-adipose-derived-stem-cells-a-comparison-of-fresh-versus-three-types-of-platelet-lysates-from-outdated-buffy-coat-derived-platelet-concentrates-cytotherapy-2017
#6
Peter V Glovinski, Mikkel Herly, Anders B Mathiasen, Jesper D Svalgaard, Rehannah Borup, Maj-Lis M Talman, Jens J Elberg, Stig-Frederikt Kølle, Krzysztof T Drzewiecki, Anne Fischer-Nielsen
No abstract text is available yet for this article.
October 2017: Cytotherapy
https://www.readbyqxmd.com/read/28886699/research-on-advanced-intervention-using-novel-bone-marrow-stem-cell-rainbow-a-study-protocol-for-a-phase-i-open-label-uncontrolled-dose-response-trial-of-autologous-bone-marrow-stromal-cell-transplantation-in-patients-with-acute-ischemic-stroke
#7
Hideo Shichinohe, Masahito Kawabori, Hiroaki Iijima, Tuyoshi Teramoto, Takeo Abumiya, Naoki Nakayama, Ken Kazumata, Shunsuke Terasaka, Teruyo Arato, Kiyohiro Houkin
BACKGROUND: Stroke is a leading cause of death and disability, and despite intensive research, few treatment options exist. However, a recent breakthrough in cell therapy is expected to reverse the neurological sequelae of stroke. Although some pioneer studies on the use of cell therapy for treating stroke have been reported, certain problems remain unsolved. Recent studies have demonstrated that bone marrow stromal cells (BMSCs) have therapeutic potential against stroke. We investigated the use of autologous BMSC transplantation as a next-generation cell therapy for treating stroke...
September 8, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28881518/-refractory-kaposiform-hemangioendothelioma-with-kasabach-merritt-syndrome-clinical-analysis-of-10-cases
#8
G L Zhang, Y Gao, Y Liu, F Gu, W Su, Q Qin, J Y Chen, H H Zhang, J Yang, X Y Liu
Objective: To analyze the clinical value of sirolimus plus prednisone for the treatment of the refractory kaposiform hemangioendothelioma(RKHE) and Kasabach-Merritt syndrome(KMS). Method: Clinical retrospective analysis was carried out for 10 patients recruited in Children's Hospital Affiliated to Capital Institute of Paediatrics from January 2014 to January 2017 who were non responders to or relapsers after the treatment of propranolol, prednisone, pingyangmycin and lauromacrogol(5 cases RKHE, 5 cases RKHE plus KMS, age ranged from 6 days to 9 years); patients were treated with sirolimus at the dosage of 0...
September 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28879551/clinical-grade-manufacturing-of-genetically-modified-car-expressing-nk-92-cells-for-the-treatment-of-erbb2-positive-malignancies
#9
Paulina Nowakowska, Annette Romanski, Nicole Miller, Marcus Odendahl, Halvard Bonig, Congcong Zhang, Erhard Seifried, Winfried S Wels, Torsten Tonn
BACKGROUND: The NK-92/5.28.z cell line (also referred to as HER2.taNK) represents a stable, lentiviral-transduced clone of ErbB2 (HER2)-specific, second-generation CAR-expressing derivative of clinically applicable NK-92 cells. This study addresses manufacturing-related issues and aimed to develop a GMP-compliant protocol for the generation of NK-92/5.28.z therapeutic doses starting from a well-characterized GMP-compliant master cell bank. MATERIALS AND METHODS: Commercially available GMP-grade culture media and supplements (fresh frozen plasma, platelet lysate) were evaluated for their ability to support expansion of NK-92/5...
September 6, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28876503/functional-links-between-disabled-2-ser723-phosphorylation-and-thrombin-signaling-in-human-platelets
#10
H-J Tsai, K-Y Chien, H-R Liao, M-S Shih, Y-C Lin, Y-W Chang, J-C Cheng, C-P Tseng
Essentials Disabled-2 (Dab2) phosphorylation status in thrombin signaling of human platelet was investigated. Ser723 was the major Dab2 phosphorylation site in human platelets stimulated by thrombin. Dab2 S723 phosphorylation (pS723) caused the dissociation of Dab2-CIN85 protein complex. Dab2-pS723 regulated ADP release and integrin αIIbβ3 activation in thrombin-treated platelets. SUMMARY: Background Disabled-2 (Dab2) is a platelet protein that is functionally involved in thrombin signaling in mice...
September 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28844373/blood-derived-eye-drops-for-the-treatment-of-cornea-and-ocular-surface-diseases
#11
REVIEW
Giuseppe Giannaccare, Piera Versura, Marina Buzzi, Laura Primavera, Marco Pellegrini, Emilio C Campos
The use of blood derived eye drops for the treatment of ocular surface disorders has become increasingly popular in recent years. The mechanism of action is the stimulation of cellular proliferation and migration by supplying an active mixture of growth factors and cytokines at the ocular surface, thus mimicking the function of the lacking natural tears. Blood derived eye drops have been used in the last decades for the treatment of a variety of ocular surface diseases, including mainly dry eye disease, persistent corneal epithelial defect, corneal ulcer, ocular surface burn, recurrent corneal erosion and limbal stem-cell deficiency...
August 8, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28836402/umbilical-cord-blood-platelet-lysate-as-serum-substitute-in-expansion-of-human-mesenchymal-stem-cells
#12
Negin Shirzad, Sima Bordbar, Alireza Goodarzi, Monire Mohammad, Pardis Khosravani, Froughazam Sayahpour, Mohamadreza Baghaban Eslaminejad, Marzieh Ebrahimi
OBJECTIVES: The diverse clinical applications for human mesenchymal stem cells (hMSCs) in cellular therapy and regenerative medicine warrant increased focus on developing adequate culture supplements devoid of animal-derived products. In the present study, we have investigated the feasibility of umbilical cord blood-platelet lysate (UCB-PL) as a standard substitute for fetal bovine serum (FBS) and human peripheral blood-PL (PB-PL). MATERIALS AND METHODS: In this experimental study, platelet concentrates (PC) from UCB and human PB donors were frozen, melted, and sterilized to obtain PL...
October 2017: Cell Journal
https://www.readbyqxmd.com/read/28834387/evaluation-of-a-platelet-lysate-bi-layered-system-for-periodontal-regeneration-in-a-rat-intrabony-3-wall-periodontal-defect
#13
Pedro S Babo, Xinjie Cai, Adelina S Plachokova, Rui L Reis, John Jansen, Manuela E Gomes, X Frank Walboomers
With currently available therapies, full regeneration of lost periodontal tissues after periodontitis cannot be achieved. In this study, a combined compartmentalized system was tested, composed of (1) a platelet lysate (PL)-based construct, which was placed along the root aiming to regenerate the root cementum and periodontal ligament, and (2) a calcium phosphate cement composite incorporated with hyaluronic acid microspheres loaded with PL, aiming to promote the regeneration of alveolar bone. This bi-layered system was assessed in a 3-wall periodontal defect in Wistar rats...
August 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28811680/the-antimicrobial-peptide-human-beta-defensin-3-is-induced-by-platelet-released-growth-factors-in-primary-keratinocytes
#14
Andreas Bayer, Justus Lammel, Mersedeh Tohidnezhad, Sebastian Lippross, Peter Behrendt, Tim Klüter, Thomas Pufe, Jochen Cremer, Holger Jahr, Franziska Rademacher, Regine Gläser, Jürgen Harder
Platelet-released growth factors (PRGF) and its related clinically used formulations (e.g., Vivostat Platelet-Rich Fibrin (PRF®)) contain a variety of chemokines, cytokines, and growth factors and are therefore used to support healing of chronic, hard-to-heal, or infected wounds. Human beta-defensin-3 (hBD-3) is an antimicrobial peptide inducibly expressed in human keratinocytes especially upon wounding. The potent antimicrobial activity of hBD-3 together with its wound closure-promoting activities suggests that hBD-3 may play a crucial role in wound healing...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28808357/platelet-released-growth-factors-induce-differentiation-of-primary-keratinocytes
#15
Andreas Bayer, Mersedeh Tohidnezhad, Justus Lammel, Sebastian Lippross, Peter Behrendt, Tim Klüter, Thomas Pufe, Holger Jahr, Jochen Cremer, Franziska Rademacher, Regine Gläser, Jürgen Harder
Autologous thrombocyte concentrate lysates, for example, platelet-released growth factors, (PRGFs) or their clinically related formulations (e.g., Vivostat PRF®) came recently into the physicians' focus as they revealed promising effects in regenerative and reparative medicine such as the support of healing of chronic wounds. To elucidate the underlying mechanisms, we analyzed the influence of PRGF and Vivostat PRF on human keratinocyte differentiation in vitro and on epidermal differentiation status of skin wounds in vivo...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28800376/fetal-bovine-serum-fbs-past-present-future
#16
Jan van der Valk, Karen Bieback, Christiane Buta, Brett Cochrane, Wilhelm G Dirks, Jianan Fu, James J Hickman, Christiane Hohensee, Roman Kolar, Manfred Liebsch, Francesca Pistollato, Markus Schulz, Daniel Thieme, Tilo Weber, Joachim Wiest, Stefan Winkler, Gerhard Gstraunthaler
The supplementation of culture medium with fetal bovine serum (FBS, also referred to as 'fetal calf serum') is still common practice in cell culture applications. Due to a number of disadvantages in terms of quality and reproducibility of in vitro data, animal welfare concerns, and in light of recent cases of fraudulent marketing, the search for alternatives and the development of serum-free medium formulations gained global attention. Here, we report on the 3rd Workshop on FBS, Serum Alternatives and Serum-free Media, where (a) regulatory aspects, (b) the serum dilemma, (c) alternatives to FBS, (d) case-studies of serum-free in vitro applications, and (e) the establishment of serum-free databases, were discussed...
August 9, 2017: ALTEX
https://www.readbyqxmd.com/read/28763452/pathogen-reduction-through-additive-free-short-wave-uv-light-irradiation-retains-the-optimal-efficacy-of-human-platelet-lysate-for-the-expansion-of-human-bone-marrow-mesenchymal-stem-cells
#17
Sabrina Viau, Lucie Chabrand, Sandy Eap, Judith Lorant, Karl Rouger, Francis Goudaliez, Chryslain Sumian, Bruno Delorme
BACKGROUND: We recently developed and characterized a standardized and clinical grade human Platelet Lysate (hPL) that constitutes an advantageous substitute for fetal bovine serum (FBS) for human mesenchymal stem cell (hMSC) expansion required in cell therapy procedures, avoiding xenogenic risks (virological and immunological) and ethical issues. Because of the progressive use of pathogen-reduced (PR) labile blood components, and the requirement of ensuring the viral safety of raw materials for cell therapy products, we evaluated the impact of the novel procedure known as THERAFLEX UV-Platelets for pathogen reduction on hPL quality (growth factors content) and efficacy (as a medium supplement for hMSC expansion)...
2017: PloS One
https://www.readbyqxmd.com/read/28762304/identification-of-two-novel-mutations-in-rasgrp2-affecting-platelet-caldag-gefi-expression-and-function-in-patients-with-bleeding-diathesis
#18
Teresa Sevivas, José María Bastida, David S Paul, Eva Caparros, Verónica Palma-Barqueros, Margarida Coucelo, Dalila Marques, Francisca Ferrer-Marín, José Ramón González-Porras, Vicente Vicente, Jesús María Hernández-Rivas, Steve P Watson, María Luisa Lozano, Wolfgang Bergmeier, José Rivera
The RASGRP2 gene encodes the Ca(2+) and DAG-regulated guanine nucleotide exchange factor I (CalDAG-GEFI), which plays a key role in integrin activation in platelets and neutrophils. We here report two new RASGRP2 variants associated with platelet dysfunction and bleeding in patients. The homozygous patients had normal platelet and neutrophil counts and morphology. Platelet phenotyping showed: prolonged PFA-100 closure times; normal expression of major glycoprotein receptors; severely reduced platelet aggregation response to ADP and collagen (both patients); aggregation response to PAR1 and arachidonic acid markedly impaired in one patient; PMA-induced aggregation unaffected; platelet secretion, clot retraction, and spreading minimally affected...
August 1, 2017: Platelets
https://www.readbyqxmd.com/read/28728000/tailor-made-purified-human-platelet-lysate-concentrated-in-neurotrophins-for-treatment-of-parkinson-s-disease
#19
Ming-Li Chou, Joe-Wei Wu, Flore Gouel, Aurélie Jonneaux, Kelly Timmerman, Ting-Yi Renn, Charlotte Laloux, Hung-Ming Chang, Liang-Tzung Lin, Jean-Christophe Devedjian, David Devos, Thierry Burnouf
Human platelet lysates (PLs), which contain multiple neurotrophins, have been proposed for treating neurodegenerative disorders, including Parkinson's disease (PD). However, current PLs suspended in plasma have high protein content and contain fibrinogen/fibrin and, following activation, also proteolytic and thrombogenic enzymes. Upon brain administration, such PLs may saturate the cerebrospinal fluid and exert neurotoxicity. We assessed whether purified PLs, concentrated in neurotrophins, protected dopaminergic neurons in PD models...
October 2017: Biomaterials
https://www.readbyqxmd.com/read/28720606/re-using-blood-products-as-an-alternative-supplement-in-the-optimisation-of-clinical-grade-adipose-derived-mesenchymal-stem-cell-culture
#20
J Phetfong, T Tawonsawatruk, K Seenprachawong, A Srisarin, C Isarankura-Na-Ayudhya, A Supokawej
OBJECTIVES: Adipose-derived mesenchymal stem cells (ADMSCs) are a promising strategy for orthopaedic applications, particularly in bone repair. Ex vivo expansion of ADMSCs is required to obtain sufficient cell numbers. Xenogenic supplements should be avoided in order to minimise the risk of infections and immunological reactions. Human platelet lysate and human plasma may be an excellent material source for ADMSC expansion. In the present study, use of blood products after their recommended transfusion date to prepare human platelet lysate (HPL) and human plasma (Hplasma) was evaluated for in vitro culture expansion and osteogenesis of ADMSCs...
July 2017: Bone & Joint Research
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