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Platelet lysate

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https://www.readbyqxmd.com/read/28188071/a-good-manufacturing-practice-grade-standard-protocol-for-exclusively-human-mesenchymal-stromal-cell-derived-extracellular-vesicles
#1
Karin Pachler, Thomas Lener, Doris Streif, Zsuzsanna A Dunai, Alexandre Desgeorges, Martina Feichtner, Michaela Öller, Katharina Schallmoser, Eva Rohde, Mario Gimona
BACKGROUND AIMS: Extracellular vesicles (EVs) released by mesenchymal stromal cells (MSCs) may contribute to biological processes such as tissue regeneration, immunomodulation and neuroprotection. Evaluation of their therapeutic potential and application in future clinical trials demands thorough characterization of EV content and production under defined medium conditions, devoid of xenogenic substances and serum-derived vesicles. Addressing the apparent need for such a growth medium, we have developed a medium formulation based on pooled human platelet lysate (pHPL), free from animal-derived xenogenic additives and depleted of EVs...
February 7, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28182293/standardizing-the-freeze-thaw-preparation-of-growth-factors-from-platelet-lysate
#2
Gabriel Strandberg, Felix Sellberg, Pehr Sommar, Martin Ronaghi, Norbert Lubenow, Folke Knutson, David Berglund
BACKGROUND: Over the past decades, the focus on the regenerative properties of platelets (PLTs) has intensified and many PLT-derived growth factors are readily used in medical settings. A general lack of standardization in the preparation of these growth factors remains, however, and this study therefore examines the dynamics of growth factors throughout the freeze-thaw procedure. STUDY DESIGN AND METHODS: Plateletpheresis (PA) and PLT-poor plasma (PPP) samples were collected from 10 healthy donors...
February 9, 2017: Transfusion
https://www.readbyqxmd.com/read/28164173/tgf-%C3%AE-1-along-with-other-platelet-contents-augments-treg-cells-to-suppress-anti-fviii-immune-responses-in-hemophilia-a-mice
#3
Dipica Haribhai, Xiaofeng Luo, Juan Chen, Shuang Jia, Linzheng Shi, Jocelyn A Schroeder, Hartmut Weiler, Richard H Aster, Martin J Hessner, Jianda Hu, Calvin B Williams, Qizhen Shi
Platelets are a rich source of many cytokines and chemokines including transforming growth factor β 1 (TGF-β1). TGF-β1 is required to convert conventional CD4(+) T (Tconv) cells into induced regulatory T (iTreg) cells that express the transcription factor Foxp3. Whether platelet contents will affect Treg cell properties has not been explored. In this study, we show that unfractionated platelet lysates (pltLys) containing TGF-β1 efficiently induced Foxp3 expression in Tconv cells. The common Treg cell surface phenotype and in vitro suppressive activity of unfractionated pltLys-iTreg cells were similar to those of iTreg cells generated using purified TGF-β1 (purTGFβ-iTreg) cells...
December 13, 2016: Blood Adv
https://www.readbyqxmd.com/read/28152010/comparison-of-corneal-epitheliotrophic-capacities-among-human-platelet-lysates-and-other-blood-derivatives
#4
Chien-Jung Huang, Yi-Chen Sun, Karen Christopher, Amy Shih-I Pai, Chia-Ju Lu, Fung-Rong Hu, Szu-Yuan Lin, Wei-Li Chen
PURPOSE: To evaluate the corneal epitheliotropic abilities of two commercialized human platelet lysates (HPLs) and to compare the results with other blood derivatives, including human peripheral serum (HPS) and bovine fetal serum (FBS). METHODS: In vitro, human corneal epithelial cells were incubated in various concentrations (0%, 3%, 5% and 10%) of blood derivatives. Two commercialized HPLs, including UltraGRO TM (Helios, Atlanta, GA) and PLTMax (Mill Creek, Rochester, MI), were tested and compared with HPS and FBS...
2017: PloS One
https://www.readbyqxmd.com/read/28114800/pre-treatment-of-human-mesenchymal-stem-cells-with-inflammatory-factors-or-hypoxia-does-not-influence-migration-to-osteoarthritic-cartilage-and-synovium
#5
Maarten J C Leijs, Gerben M van Buul, Jan A N Verhaar, Martin J Hoogduijn, Pieter K Bos, Gerjo J V M van Osch
BACKGROUND: Mesenchymal stem cells (MSCs) are promising candidates as a cell-based therapy for osteoarthritis (OA), although current results are modest. Pre-treatment of MSCs before application might improve their therapeutic efficacy. HYPOTHESIS: Pre-treatment of MSCs with inflammatory factors or hypoxia will improve their migration and adhesion capacities toward OA-affected tissues. STUDY DESIGN: Controlled laboratory study. METHODS: We used real-time polymerase chain reaction to determine the effects of different fetal calf serum (FCS) batches, platelet lysate (PL), hypoxia, inflammatory factors, factors secreted by OA tissues, and OA synovial fluid (SF) on the expression of 12 genes encoding chemokine or adhesion receptors...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28024508/-reconstruction-of-humanized-bone-marrow-niche-in-immunodeficiency-mouse
#6
Huan Chen, Zheng Tian, Bin Li, Hai-Yan Xing, Huan Li, Ke-Jing Tang, Min Wang, Qing Rao
OBJECTIVE: To reconstruct a human bone marrow niche in immunodeficiency mouse (NOD/SCID) so as to provide a model for observing the effect of abnormal BM niche on the occurence and development of leukemia. METHODS: Human platelet lysate(HPL) was obtained by repeated freezing and thawing of concentrated platelet. Bone marrow-derived mesenchymal stem cells were cultured in α-minimal essential medium (α-MEM) containing 10% HPL or 10% FBS. The morphology, cell phenotype, multilineage differentiation potential in vitro and proliferation capacity between the mesenchymal stem cells cultured with HPL or FBS were compared...
December 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28013442/dmso-free-cryopreservation-of-adipose-derived-mesenchymal-stromal-cells-expansion-medium-affects-post-thaw-survival
#7
Olena Rogulska, Yuri Petrenko, Alexander Petrenko
Off-the-shelf availability of human adipose-derived mesenchymal stromal cells (ASCs) for regenerative medicine application requires the development of nontoxic, safe, and efficient protocols for cryopreservation. Favorably, such cell processing protocols should not contain xenogeneic or toxic components, such as fetal bovine serum (FS) and dimethyl sulfoxide (DMSO). The objective of the study was to assess the sensitivity of ASCs to DMSO-free cryopreservation protocol depending on their expansion conditions: conventional, based on the application of FS or xeno-free, using PL as a medium supplement...
December 24, 2016: Cytotechnology
https://www.readbyqxmd.com/read/27968851/development-of-the-novel-antiplatelet-agent-adtm-originating-from-traditional-chinese-medicine-a-chemical-proteomic-analysis-and-in-vivo-assessment-of-efficacy-in-an-animal-model
#8
Guozhen Cui, Angela Wa Ho, Simon Ming Yuen Lee, Yuqiang Wang, Maggie Pui Man Hoi
BACKGROUND: An ageing population and lifestyle changes have led to increased cardiovascular disease-related morbidity and mortality in China, where an estimated 230 million people have cardiovascular disease. Long-term antiplatelet therapy with aspirin and clopidogrel are used for treatment and post-stenting primary prevention of acute coronary syndrome, but the risk of bleeding complications is high. This study aimed to identify the target of the newly developed antiplatelet agent ADTM, originating from traditional Chinese herbs...
October 2016: Lancet
https://www.readbyqxmd.com/read/27958222/effects-of-ginseng-fruit-saponins-on-serotonin-system-in-sprague-dawley-rats-with-myocardial-infarction-depression-and-myocardial-infarction-complicated-with-depression
#9
Dong-Fang He, Yan-Ping Ren, Mei-Yan Liu
BACKGROUND: Our previous studies have demonstrated that the levels of 5-hydroxytryptamine (5-HT) and 5-HT 2A receptor (5-HT2AR) in serum and platelet were associated with depression and myocardial infarction (MI), and pretreatment with ginseng fruit saponins (GFS) before MI and depression had an effect on the 5-HT system. In this study, the effects of GFS on the 5-HT system in the Sprague-Dawley (SD) rats with MI, depression, and MI + depression were evaluated. METHODS: A total of eighty SD rats were allocated to four groups: MI, depression, MI + depression, and control groups (n = 20 in each group)...
2016: Chinese Medical Journal
https://www.readbyqxmd.com/read/27943660/clinical-scale-expansion-of-adipose-derived-stromal-cells-starting-from-stromal-vascular-fraction-in-a-single-use-bioreactor-proof-of-concept-for-autologous-applications
#10
Mélanie Gadelorge, Marion Bourdens, Nicolas Espagnolle, Clémence Bardiaux, Julie Murrell, Lenaig Savary, Sylvain Ribaud, Benoît Chaput, Luc Sensebe
Adipose derived stromal cells (ASC) are adult multipotent cells increasingly used for cell therapy due to their differentiation potential, their paracrine effect and their convenience. ASC are currently selected from stromal vascular fraction (SVF) of adipose tissue and expanded in 2D flasks following Good Manufacturing Practices. This process is limited in surface area, labor-intensive and expensive, especially for autologous applications requiring selection and expansion steps for every patient. Closed and automated bioreactors offer an alternative for scalable and cost-effective production of ASCs...
December 11, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27943621/the-protective-effect-of-human-platelet-lysate-in-models-of-neurodegenerative-disease-involvement-of-the-akt-and-mek-pathways
#11
Flore Gouel, Bruce Do Van, Ming-Li Chou, Aurélie Jonneaux, Caroline Moreau, Régis Bordet, Thierry Burnouf, Jean-Christophe Devedjian, David Devos
Neurodegenerative diseases have huge economic and societal impacts, and place an immense emotional burden on patients and caregivers. Given that platelets have an essential physiological role in wound healing and tissue repair, human platelet lysates (HPLs) are being developed as a novel, effective biotherapy for neurodegenerative diseases. HPLs constitute abundant, readily accessible sources of physiological mixtures of many growth factors (GFs), with demonstrable effects on neuron survival and thus the development, maintenance, function and plasticity of the vertebrate nervous system...
December 12, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27941770/polyvalent-immunoglobulins-platelet-lysate-and-lenalidomide-cocktail-for-polyfunctional-nk-cells-expansion-for-multiple-myeloma
#12
H Trébéden-Negre, V Vieillard, M Rosenzwajg, L Garderet, M Cherai, S Nguyen-Quoc, M L Tanguy, F Norol
No abstract text is available yet for this article.
December 12, 2016: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/27939374/mesenchymal-stromal-cell-secreted-chemerin-is-a-novel-immunomodulatory-molecule-driving-the-migration-of-chemr23-expressing-cells
#13
Paola Vinci, Antonio Bastone, Silvia Schiarea, Claudia Cappuzzello, Annalisa Del Prete, Erica Dander, Andrea Biondi, Giovanna D'Amico
BACKGROUND: Mesenchymal stromal cells (MSCs) are multipotent cells characterized by broad immunomodulatory properties exploited for the treatment of inflammatory disorders. However, the efficacy of MSC-based therapy is highly variable and tightly linked to MSC culture conditions and treatment schedule. Thus, the identification of novel key molecules regulating MSC immunomodulatory activities in vivo might constitute a crucial step toward the optimization of currently available clinical protocols...
February 2017: Cytotherapy
https://www.readbyqxmd.com/read/27933268/autologous-platelet-lysates-local-injections-for-treatment-of-tibia-non-union-with-breakage-of-the-nickelclad-a-case-report
#14
Hong-Jiang Jiang, Xun-Xiang Tan, Hai-Yang Ju, Jin-Ping Su, Wei Yan, Xiu-Gang Song, Li-Wu Qin, Chang-Jun Ju, Ling-Shuang Wang, De-Bao Zou
BACKGROUND: Nonunions of the tibia represent challenging orthopedic problems, which require the surgeon to analyze numerous factors and choose an appropriate treatment. This article presents a case report of tibia and fibula fracture patient who failed the internal fixation surgery and successfully recovered after one course of percutaneous autologous platelet lysates injection. CASE DESCRIPTION: The patient received an internal nickelclad breakage at 9 months post-surgery but reluctant to accept a second surgery, then autologous platelet lysates (APL) injection which is a less invasive method was recommended...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27890405/platelets-inhibit-migration-of-canine-osteosarcoma-cells
#15
S C Bulla, P R Badial, R C Silva, K Lunsford, C Bulla
The interaction between platelets and tumour cells is important for tumour growth and metastasis. Thrombocytopenia or antiplatelet treatment negatively impact on cancer metastasis, demonstrating potentially important roles for platelets in tumour progression. To our knowledge, there is no information regarding the role of platelets in cancer progression in dogs. This study was designed to test whether canine platelets affected the migratory behaviour of three canine osteosarcoma cell lines and to give insights of molecular mechanisms...
November 24, 2016: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/27887865/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
#16
Peter V Glovinski, Mikkel Herly, Anders B Mathiasen, Jesper D Svalgaard, Rehannah Borup, Maj-Lis M Talman, Jens J Elberg, Stig-Frederik T Kølle, Krzysztof T Drzewiecki, Anne Fischer-Nielsen
BACKGROUND: Platelet lysates (PL) represent a promising replacement for xenogenic growth supplement for adipose-derived stem cell (ASC) expansions. However, fresh platelets from human blood donors are not clinically feasible for large-scale cell expansion based on their limited supply. Therefore, we tested PLs prepared via three methods from outdated buffy coat-derived platelet concentrates (PCs) to establish an efficient and feasible expansion of ASCs for clinical use. METHODS: PLs were prepared by the freeze-thaw method from freshly drawn platelets or from outdated buffy coat-derived PCs stored in the platelet additive solution, InterSol...
February 2017: Cytotherapy
https://www.readbyqxmd.com/read/27882464/analysis-of-reparative-activity-of-platelet-lysate-effect-on-cell-monolayer-recovery-in-vitro-and-skin-wound-healing-in-vivo
#17
N S Sergeeva, Ya D Shanskii, I K Sviridova, P A Karalkin, V A Kirsanova, S A Akhmedova, A D Kaprin
Platelet lysate prepared from donor platelet concentrate and pooled according to a developed technique stimulates migration of multipotent mesenchymal stromal cells of the human adipose tissue and promotes healing of the monolayer defect in cultures of human fibroblasts and multipotent mesenchymal stromal cells in vitro in concentrations close those of fetal calf serum (5-10%). Lysate of platelets from platelet-rich rat blood plasma stimulated healing of the skin defect by promoting epithelialization and granulation tissue formation...
November 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27865782/application-of-nano-lc-maldi-tof-tof-ms-for-proteomic-analysis-of-microvesicles
#18
Joanna Kasprzyk, Ewa Stępień, Wojciech Piekoszewski
Activated platelets and platelet derived microvesicles (PMVs) emerged recently to be promising biomarkers. There is no universal procedure to carry out the proteomic analysis on microvesicles. In this study we proposed a nano-liquid chromatography (nano-LC) technique coupled off-line with a spectrometric measurement MALDI-TOF-MS/MS as a throughput and time-saving procedure. In this study we developed a simplified method to evaluate the protein composition of platelet organelles and PMVs. Platelet-rich plasma (PRP) was collected from healthy donors...
November 16, 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27849108/influence-of-calcium-salts-and-bovine-thrombin-on-growth-factor-release-from-equine-platelet-rich-gel-supernatants
#19
Carlos E Giraldo, María E Álvarez, Jorge U Carmona
OBJECTIVE: To compare five activation methods in equine platelet-rich plasma (PRP) by determination of platelet-derived growth factor BB (PDGF-BB) and transforming growth factor beta 1 (TGF-β1) concentrations in platelet-rich gel (PRG) supernatants. METHODS: Platelet-rich plasma from 20 horses was activated by calcium chloride (CC), calcium gluconate (CG), bovine thrombin (BT), and their combinations, BTCC and BTCG. Both growth factor concentrations in PRG supernatants were measured by ELISA and compared with plasma and platelet lysates (PL) over time...
November 16, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/27848264/underlying-mechanism-and-specific-prevention-of-hemolysis-induced-platelet-activation
#20
Thomas Gremmel, Simone Fedrizzi, Günter Weigel, Beate Eichelberger, Simon Panzer
Thromboembolic complications significantly impair the outcome of hemolytic disorders. We hypothesized that red cell adenosine diphosphate (ADP) release results in significant platelet activation in hemolysis and that this prothrombotic state can be prevented by inhibition of the ADP P2Y12 receptor. In the current study, we therefore sought to investigate the mechanism and inhibition of hemolysis-induced platelet activation. The expression of activated integrin αIIbß3 was determined by flow cytometry, and platelet aggregation was assessed by multiple electrode platelet aggregometry...
November 16, 2016: Platelets
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