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Debaene C, Feys HB, Six KR. Shedding light on GPIbα shedding. Curr Opin Hematol 2024; 31:224-229. [PMID: 38728102 DOI: 10.1097/moh.0000000000000826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
PURPOSE OF REVIEW Ectodomain shedding has been investigated since the late 1980s. The abundant and platelet specific GPIbα receptor is cleaved by ADAM17 resulting in the release of its ectodomain called glycocalicin. This review will address the role of glycocalicin as an end-stage marker of platelet turnover and storage lesion and will consider a potential function as effector in processes beyond hemostasis. RECENT FINDINGS Glycocalicin has been described as a marker for platelet senescence, turnover and storage lesion but is not routinely used in a clinical setting because its diagnostic value is nondiscriminatory. Inhibition of glycocalicin shedding improves posttransfusion recovery but little is known (yet) about potential hemostatic improvements. In physiological settings, GPIbα shedding is restricted to the intracellular GPIbα receptor subpopulation suggesting a role for shedding or glycocalicin beyond hemostasis. SUMMARY So far, all evidence represents glycocalicin as an end-stage biomarker of platelet senescence and a potential trigger for platelet clearance. The extensive list of interaction partners of GPIbα in fields beyond hemostasis opens new possibilities to investigate specific effector functions of glycocalicin.
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Affiliation(s)
- Caitlin Debaene
- Transfusion Research Center, Belgian Red Cross Flanders
- Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Hendrik B Feys
- Transfusion Research Center, Belgian Red Cross Flanders
- Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Katrijn R Six
- Transfusion Research Center, Belgian Red Cross Flanders
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2
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Hosseini E, Taherabadi E, Rajabi A, Ghasemzadeh M. Reduction of ristocetin-induced platelet aggregation (RIPA) during storage despite plasma renewal: evidence for hemostatic importance of GPIbα shedding. Expert Rev Hematol 2024; 17:391-403. [PMID: 38889268 DOI: 10.1080/17474086.2024.2370557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/25/2024] [Indexed: 06/20/2024]
Abstract
BACKGROUND Platelet storage is complicated by deleterious changes, among which reduction of ristocetin-induced platelet aggregation (RIPA) has a poorly understood mechanism. The study elucidates the mechanistic roles of all the possible players in this process. RESEARCH DESIGN AND METHODS PRP-platelet concentrates were subjected to RIPA, collagen-induced platelet aggregation (CIPA), and flowcytometric analysis of GPIbα and PAC-1 binding from days 0 to 5 of storage. Platelet-poor plasma was subjected to colorimetric assays for glucose/LDH evaluation and automatic analyzer to examine VWF antigen and activity. RESULTS From day three of platelet storage, reducing CIPA but not RIPA was correlated with the reduction of both metabolic state and integrin activity. RIPA reduction was directly related to the decreased levels of total-content/expression of GPIbα, and inversely related to its shedding levels during storage. Re-suspension of 5-day stored platelet in fresh plasma compensated CIPA, but not RIPA. VWF concentration and its activity did not change during storage while they had no correlation with RIPA. CONCLUSIONS This study identified the irreversible loss of platelet GPIbα, but not VWF status, as the primary cause of the storage-dependent decrease of RIPA. Unlike CIPA, this observation was not compensated by plasma refreshment, suggesting that some evidence of PSL may not be recovered after transfusion.
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Affiliation(s)
- Ehteramolsadat Hosseini
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran
| | - Emad Taherabadi
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran
| | - Ali Rajabi
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran
| | - Mehran Ghasemzadeh
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine, Tehran, Iran
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3
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Feldman TP, Brown BL. Evaluation of a method to fluorescently label platelets for in-human recovery and survival studies. Vox Sang 2024; 119:764-768. [PMID: 38697641 DOI: 10.1111/vox.13646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/15/2024] [Accepted: 04/16/2024] [Indexed: 05/05/2024]
Abstract
BACKGROUND AND OBJECTIVES Platelets for transfusion are evaluated for in vivo quality using recovery and survival measurements in healthy human subjects. Radiolabelling is the standard for tracing platelets post-transfusion but imposes logistical and technical limitations. This study investigates the in vitro feasibility of labelling platelets with the calcein family of fluorescent dyes as an alternative to radioisotopes or biotin. MATERIALS AND METHODS Protocols for radiolabelling were adapted for use with calcein acetoxymethyl ester (CAM) and biotin. Labelled platelets were analysed by flow cytometry and evaluated for activation and function. We tested feasibility for labelling without manipulation of platelets and for multiplexing of samples. RESULTS Labelling at 2 μg CAM/1010 platelets resulted in >99% of CAM+ platelets. There was no significant difference in activation or aggregation between CAM-labelled or biotinylated platelets and vehicle controls although %CD62P+ was significantly lower in platelets that were not processed for labelling. Addition of CAM to the platelet storage bag labelled >95% of platelets. Platelet populations labelled with different dyes could be distinguished by flow cytometry. CONCLUSION These data provide a rationale for further development of CAM and other fluorescent dyes as tools for measuring post-transfusion kinetics of platelets.
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Affiliation(s)
- Tamar P Feldman
- American Red Cross, Holland Lab for the Biomedical Sciences, Rockville, Maryland, USA
| | - Bethany L Brown
- American Red Cross, Holland Lab for the Biomedical Sciences, Rockville, Maryland, USA
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4
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Rak-Pasikowska A, Hałucha K, Sapa-Wojciechowska A, Wrzyszcz A, Gałuszka W, Pęcak-Solińska A, Bil-Lula I. The Effect of Leukocyte Removal and Matrix Metalloproteinase Inhibition on Platelet Storage Lesions. Cells 2024; 13:506. [PMID: 38534349 DOI: 10.3390/cells13060506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/11/2024] [Accepted: 03/11/2024] [Indexed: 03/28/2024] Open
Abstract
The reasons for unfavorable changes in platelet concentrate (PC) quality during storage are not fully understood yet. We aimed to evaluate whether leukocytes and matrix metalloproteinases (MMPs) lead to a decrease in the quality of PCs and examine whether MMP inhibition will slow down the platelets' aging. Nine PCs were divided into three parts: (1) leukocyte-depleted (F) PCs, (2) PCs with no additional procedures (NF), and (3) PCs with the addition of an MMP inhibitor-doxycycline (D). Each PC was stored for 144 h, and a sample for testing was separated from each part on the day of preparation and after 24, 48, 72 and 144 h of storage. Blood morphological analysis, platelet aggregation, and the expression of activation markers were evaluated. MMP-2 and MMP-9 concentration, activity, and gene expression were assessed. Platelet aggregation decreased, and platelet activation marker expression increased during the storage. D concentrates showed the lowest level of platelet activation. In turn, leukocyte-depleted PCs showed the highest level of platelet activation in general. MMP-9 platelet activity was higher in leukocyte-containing concentrates at the end of the storage period. We concluded that the filtration process leads to a higher platelet activation level. The presence of doxycycline in PCs reduces the expression of the activation markers as compared to leukocyte-depleted concentrates.
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Affiliation(s)
- Alina Rak-Pasikowska
- Division of Clinical Chemistry and Laboratory Haematology, Department of Medical Laboratory Diagnostics, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A St., 50-556 Wrocław, Poland
| | - Kornela Hałucha
- Division of Clinical Chemistry and Laboratory Haematology, Department of Medical Laboratory Diagnostics, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A St., 50-556 Wrocław, Poland
- Lower Silesian Oncology, Pulmonology and Hematology Center, 12 Hirszfeld Square, 53-413 Wrocław, Poland
| | - Agnieszka Sapa-Wojciechowska
- Division of Clinical Chemistry and Laboratory Haematology, Department of Medical Laboratory Diagnostics, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A St., 50-556 Wrocław, Poland
| | - Aneta Wrzyszcz
- Lower Silesian Oncology, Pulmonology and Hematology Center, 12 Hirszfeld Square, 53-413 Wrocław, Poland
| | - Wioletta Gałuszka
- Professor Tadeusz Dorobisz Regional Centre for Blood Donation and Haemotherapy in Wrocław, Red Cross 5/9 St., 50-345 Wrocław, Poland
| | - Anna Pęcak-Solińska
- Professor Tadeusz Dorobisz Regional Centre for Blood Donation and Haemotherapy in Wrocław, Red Cross 5/9 St., 50-345 Wrocław, Poland
| | - Iwona Bil-Lula
- Division of Clinical Chemistry and Laboratory Haematology, Department of Medical Laboratory Diagnostics, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211A St., 50-556 Wrocław, Poland
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5
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Kayama A, Eto K. Mass production of iPSC-derived platelets toward the clinical application. Regen Ther 2024; 25:213-219. [PMID: 38260088 PMCID: PMC10801197 DOI: 10.1016/j.reth.2023.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/06/2023] [Accepted: 12/17/2023] [Indexed: 01/24/2024] Open
Abstract
The ex vivo production of platelets from induced pluripotent cells (iPSCs) may offer a safer and sustainable alternative for transfusions and drug delivery systems (DDS). However, the mass production of the clinically required number of iPSC-derived platelets (iPSC-PLTs) is challenging. Here, we introduce recent technologies for mass production and the first-in-human clinical trial using ex vivo iPSC-PLTs. To this end, we established immortalized megakaryocyte progenitor cell lines (imMKCLs) as an expandable master cell bank (MCB) through the overexpression of c-MYC, BMI1 and BCL-XL, which modulated megakaryopoiesis and thrombopoiesis. We also optimized a culture cocktail for maturation of the imMKCLs by mixing an aryl hydrocarbon receptor (AhR) antagonist, SR1/GNF-316; a Rho-associated protein kinase (ROCK) inhibitor, Y-27632/Y-39983; and a small-molecule compound replacing recombinant thrombopoietin (TPO), TA-316. Finally, we discovered the importance of turbulence on the manufacturing of intact iPSC-PLTs, allowing us to develop a turbulence-based bioreactor, VerMES. Combination of the MCB and VerMES enabled us to produce more than 100 billion iPSC-PLTs, leading to the first-in-human clinical trial. Despite these advancements, many challenges remain before expanding the clinical implementation of this strategy.
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Simeone P, Liani R, Tripaldi R, Ciotti S, Recchiuti A, Abbonante V, Porro B, Del Boccio P, Di Castelnuovo A, Lanuti P, Camera M, Pieragostino D, Lee-Sundlov M, Luongo M, Auciello R, Bologna G, Cufaro MC, Tremoli E, Hoffmeister KM, Cipollone F, Balduini A, Santilli F. Reduced platelet glycoprotein Ibα shedding accelerates thrombopoiesis and COX-1 recovery: implications for aspirin dosing regimen. Haematologica 2023; 108:1141-1157. [PMID: 36546455 PMCID: PMC10071111 DOI: 10.3324/haematol.2022.281006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
Cardiovascular (CV) disease prevention with low-dose aspirin can be less effective in patients with a faster recovery of platelet (PLT) cyclooxygenase (COX)-1 activity during the 24-hour dosing interval. We previously showed that incomplete suppression of TXA2 over 24 hours can be rescued by a twice daily aspirin regimen. Here we show that reduced PLT glycoprotein (GP)Ibα shedding characterizes patients with accelerated COX-1 recovery and may contribute to higher thrombopoietin (TPO) production and higher rates of newly formed PLT, escaping aspirin inhibition over 24 hours. Two hundred aspirin-treated patients with high CV risk (100 with type 2 diabetes mellitus) were stratified according to the kinetics of PLT COX-1 activity recovery during the 10- to 24-hour dosing interval. Whole proteome analysis showed that PLT from patients with accelerated COX-1 recovery were enriched in proteins involved in cell survival, inhibition of apoptosis and cellular protrusion formation. In agreement, we documented increased plasma TPO, megakaryocyte maturation and proplatelet formation, and conversely increased PLT galactose and reduced caspase 3, phosphatidylserine exposure and ADAM17 activation, translating into diminished GPIbα cleavage and glycocalicin (GC) release. Treatment of HepG2 cells with recombinant GC led to a dose-dependent reduction of TPO mRNA in the liver, suggesting that reduced GPIbα ectodomain shedding may unleash thrombopoiesis. A cluster of clinical markers, including younger age, non-alcoholic fatty liver disease, visceral obesity and higher TPO/GC ratio, predicted with significant accuracy the likelihood of faster COX-1 recovery and suboptimal aspirin response. Circulating TPO/GC ratio, reflecting a dysregulation of PLT lifespan and production, may provide a simple tool to identify patients amenable to more frequent aspirin daily dosing.
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Affiliation(s)
- Paola Simeone
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology (CAST), University of Chieti
| | - Rossella Liani
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology (CAST), University of Chieti
| | - Romina Tripaldi
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology (CAST), University of Chieti
| | - Sonia Ciotti
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology (CAST), University of Chieti
| | - Antonio Recchiuti
- Department of Medical, Oral, and Biotechnological Science, Center for Advanced Studies and Technology (CAST), Chieti
| | - Vittorio Abbonante
- Department of Molecular Medicine, University of Pavia, Pavia, Italy; Department of Health Sciences, Magna Graecia University of Catanzaro, Catanzaro
| | | | - Piero Del Boccio
- Department of Pharmacy, Center for Advanced Studies and Technology (CAST), Chieti
| | | | - Paola Lanuti
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology (CAST), University of Chieti
| | - Marina Camera
- Centro Cardiologico Monzino IRCCS, Milan; Department of Pharmaceutical Sciences, Università degli Studi di Milano, Milan
| | - Damiana Pieragostino
- Department of Innovative Technologies in Medicine and Dentistry, Center for Advanced Studies and Technology (CAST), Chieti
| | - Melissa Lee-Sundlov
- Versiti Translational Glycomics Center and Versiti Blood Research Institute, Milwaukee, WI
| | - Myriam Luongo
- Immunotransfusion Service, Clinical Haematology of Chieti University Hospital
| | | | - Giuseppina Bologna
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology (CAST), University of Chieti
| | - Maria Concetta Cufaro
- Department of Innovative Technologies in Medicine and Dentistry, Center for Advanced Studies and Technology (CAST), Chieti
| | | | - Karin M Hoffmeister
- Versiti Translational Glycomics Center and Versiti Blood Research Institute, Milwaukee, WI, USA; Departments of Biochemistry and Medicine, Medical College of Wisconsin, Milwaukee, WI
| | - Francesco Cipollone
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology (CAST), University of Chieti
| | | | - Francesca Santilli
- Department of Medicine and Aging Sciences, Center for Advanced Studies and Technology (CAST), University of Chieti.
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7
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Yang S, Wang L, Wu Y, Wu A, Huang F, Tang X, Kantawong F, Anuchapreeda S, Qin D, Mei Q, Chen J, Huang X, Zhang C, Wu J. Apoptosis in megakaryocytes: Safeguard and threat for thrombopoiesis. Front Immunol 2023; 13:1025945. [PMID: 36685543 PMCID: PMC9845629 DOI: 10.3389/fimmu.2022.1025945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 12/09/2022] [Indexed: 01/06/2023] Open
Abstract
Platelets, generated from precursor megakaryocytes (MKs), are central mediators of hemostasis and thrombosis. The process of thrombopoiesis is extremely complex, regulated by multiple factors, and related to many cellular events including apoptosis. However, the role of apoptosis in thrombopoiesis has been controversial for many years. Some researchers believe that apoptosis is an ally of thrombopoiesis and platelets production is apoptosis-dependent, while others have suggested that apoptosis is dispensable for thrombopoiesis, and is even inhibited during this process. In this review, we will focus on this conflict, discuss the relationship between megakaryocytopoiesis, thrombopoiesis and apoptosis. In addition, we also consider why such a vast number of studies draw opposite conclusions of the role of apoptosis in thrombopoiesis, and try to figure out the truth behind the mystery. This review provides more comprehensive insights into the relationship between megakaryocytopoiesis, thrombopoiesis, and apoptosis and finds some clues for the possible pathological mechanisms of platelet disorders caused by abnormal apoptosis.
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Affiliation(s)
- Shuo Yang
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Long Wang
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Yuesong Wu
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Anguo Wu
- School of Pharmacy, Southwest Medical University, Luzhou, China
- Institute of Cardiovascular Research, the Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Feihong Huang
- School of Pharmacy, Southwest Medical University, Luzhou, China
- Institute of Cardiovascular Research, the Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Xiaoqin Tang
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Fahsai Kantawong
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Songyot Anuchapreeda
- Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Dalian Qin
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Qibing Mei
- School of Pharmacy, Southwest Medical University, Luzhou, China
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Jianping Chen
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Xinwu Huang
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Chunxiang Zhang
- Institute of Cardiovascular Research, the Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Jianming Wu
- School of Pharmacy, Southwest Medical University, Luzhou, China
- Institute of Cardiovascular Research, the Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
- School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
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8
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Chen W, Wilson MS, Wang Y, Bergmeier W, Lanza F, Li R. Fast clearance of platelets in a commonly used mouse model for GPIbα is impeded by an anti-GPIbβ antibody derivative. J Thromb Haemost 2022; 20:1451-1463. [PMID: 35305057 PMCID: PMC9133214 DOI: 10.1111/jth.15702] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/21/2022] [Accepted: 03/14/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND Glycoprotein (GP)Ibα plays a critical role in regulating platelet clearance. Recently, we identified the mechanosensory domain (MSD) in GPIbα and reported evidence to suggest that unfolding of the GPIbα MSD induces exposure of the Trigger sequence therein and subsequent GPIb-IX signaling that accelerates platelet clearance. In a commonly used transgenic mouse model, IL4R-IbαTg, where the Trigger sequence is constitutively exposed, constitutive GPIb-IX-mediated cellular signals are present. Clearance of their platelets is also significantly faster than that of wild-type mice. Previously, an anti-GPIbβ antibody RAM.1 was developed. RAM.1 inhibits GPIbα-dependent platelet signaling and activation. Further, RAM.1 also inhibits anti-GPIbα antibody-mediated filopodia formation. OBJECTIVE To investigate whether RAM.1 can ameliorate trigger sequence exposure-mediated platelet clearance. METHODS Spontaneous filopodia were measured by confocal microscopy. Other platelet signaling events were measured by flow cytometry. Endogenous platelet life span was tracked by Alexa 488-labeled anti-mouse GPIX antibody. RESULT Transfected Chinese hamster ovary cells stably expressing the same chimeric IL4R-Ibα protein complex as in IL4R-IbαTg mice also constitutively exhibit filopodia, and that such filopodia could be abolished by treatment of RAM.1. Further, transfusion of a recombinant RAM.1 derivative that is devoid of its Fc portion significantly extends the endogenous life span of IL4R-IbαTg platelets. CONCLUSION These results provide the key evidence supporting the causative link of Trigger sequence exposure to accelerated platelet clearance, and suggest that a RAM.1 derivative may be therapeutically developed to treat GPIb-IX-mediated thrombocytopenia.
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Affiliation(s)
- Wenchun Chen
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Departments of Pediatrics, Emory University School of Medicine Atlanta, GA
| | - Moriah S. Wilson
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Departments of Pediatrics, Emory University School of Medicine Atlanta, GA
| | - Yingchun Wang
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Departments of Pediatrics, Emory University School of Medicine Atlanta, GA
| | - Wolfgang Bergmeier
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC
| | - Francois Lanza
- Université de Strasbourg, INSERM, BPPS UMR-S1255, Strasbourg, France
| | - Renhao Li
- Aflac Cancer and Blood Disorders Center, Children’s Healthcare of Atlanta, Departments of Pediatrics, Emory University School of Medicine Atlanta, GA
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Divalent magnesium restores cytoskeletal storage lesions in cold-stored platelet concentrates. Sci Rep 2022; 12:6229. [PMID: 35422472 PMCID: PMC9010418 DOI: 10.1038/s41598-022-10231-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 04/04/2022] [Indexed: 01/20/2023] Open
Abstract
Cold storage of platelet concentrates (PC) has become attractive due to the reduced risk of bacterial proliferation, but in vivo circulation time of cold-stored platelets is reduced. Ca2+ release from storage organelles and higher activity of Ca2+ pumps at temperatures < 15 °C triggers cytoskeleton changes. This is suppressed by Mg2+ addition, avoiding a shift in Ca2+ hemostasis and cytoskeletal alterations. We report on the impact of 2–10 mM Mg2+ on cytoskeleton alterations of platelets from PC stored at room temperature (RT) or 4 °C in additive solution (PAS), 30% plasma. Deformation of platelets was assessed by real-time deformability cytometry (RT-DC), a method for biomechanical cell characterization. Deformation was strongly affected by storage at 4 °C and preserved by Mg2+ addition ≥ 4 mM Mg2+ (mean ± SD of median deformation 4 °C vs. 4 °C + 10 mM Mg2+ 0.073 ± 0.021 vs. 0.118 ± 0.023, p < 0.01; n = 6, day 7). These results were confirmed by immunofluorescence microscopy, showing that Mg2+ ≥ 4 mM prevents 4 °C storage induced cytoskeletal structure lesion. Standard in vitro platelet function tests showed minor differences between RT and cold-stored platelets. Hypotonic shock response was not significantly different between RT stored (56.38 ± 29.36%) and cold-stored platelets with (55.22 ± 11.16%) or without magnesium (45.65 ± 11.59%; p = 0.042, all n = 6, day 1). CD62P expression and platelet aggregation response were similar between RT and 4 °C stored platelets, with minor changes in the presence of higher Mg2+ concentrations. In conclusion, increasing Mg2+ up to 10 mM in PAS counteracts 4 °C storage lesions in platelets, maintains platelet cytoskeletal integrity and biomechanical properties comparable to RT stored platelets.
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10
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Bendas G, Schlesinger M. The GPIb-IX complex on platelets: insight into its novel physiological functions affecting immune surveillance, hepatic thrombopoietin generation, platelet clearance and its relevance for cancer development and metastasis. Exp Hematol Oncol 2022; 11:19. [PMID: 35366951 PMCID: PMC8976409 DOI: 10.1186/s40164-022-00273-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/19/2022] [Indexed: 12/13/2022] Open
Abstract
The glycoprotein (GP) Ib-IX complex is a platelet receptor that mediates the initial interaction with subendothelial von Willebrand factor (VWF) causing platelet arrest at sites of vascular injury even under conditions of high shear. GPIb-IX dysfunction or deficiency is the reason for the rare but severe Bernard-Soulier syndrome (BSS), a congenital bleeding disorder. Although knowledge on GPIb-IX structure, its basic functions, ligands, and intracellular signaling cascades have been well established, several advances in GPIb-IX biology have been made in the recent years. Thus, two mechanosensitive domains and a trigger sequence in GPIb were characterized and its role as a thrombin receptor was deciphered. Furthermore, it became clear that GPIb-IX is involved in the regulation of platelet production, clearance and thrombopoietin secretion. GPIb is deemed to contribute to liver cancer development and metastasis. This review recapitulates these novel findings highlighting GPIb-IX in its multiple functions as a key for immune regulation, host defense, and liver cancer development.
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Affiliation(s)
- Gerd Bendas
- Department of Pharmacy, Rheinische Friedrich-Wilhelms-University Bonn, An der Immenburg 4, 53121, Bonn, Germany
| | - Martin Schlesinger
- Department of Pharmacy, Rheinische Friedrich-Wilhelms-University Bonn, An der Immenburg 4, 53121, Bonn, Germany. .,Federal Institute for Drugs and Medical Devices (BfArM), Bonn, Germany.
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11
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Colberg L, Cammann C, Wesche J, Topfstedt E, Seifert U, Greinacher A. The platelet proteasome and immunoproteasome are stable in buffy-coat derived platelet concentrates for up to 7 days. Transfusion 2021; 61:2746-2755. [PMID: 34331776 DOI: 10.1111/trf.16605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 06/20/2021] [Accepted: 06/27/2021] [Indexed: 01/19/2023]
Abstract
OBJECTIVES Characterization of the proteasome and its stability in buffy-coat derived platelet concentrates (PCs) during storage. BACKGROUND The proteasome plays a key role in cell homeostasis by processing misfolded or abnormal proteins and regulating the levels and activities of a high number of proteins contributing to cell cycle, survival, and proliferation. Controversial data exist, whether inhibition of the proteasome affects platelet function. Little is known about function, expression, and stability of the proteasome in PCs during storage, and the potential role of the platelet proteasome in storage lesions. STUDY DESIGN AND METHODS PCs were produced by the buffy-coat method in additive solution and stored at room temperature under agitation. Platelet aggregation was monitored by light transmission aggregometry. Proteasome complexes were assessed by immunoprecipitation and immunoblotting, and proteasome activity was measured using fluorogenic substrates specific for the three different proteolytic activities over 7 days of storage. RESULTS Proteasome inhibition led to a decreased platelet aggregation response after activation with collagen, ADP, TRAP-6, and thrombin. There were no changes in the expression of the catalytic active subunits as well as the proteasome activity during storage of PCs, comparing baseline and day 7. DISCUSSION Platelet proteasome function is relevant for platelet aggregation in response to various agonists. The constitutive and stable expression of the active standard- and immunoproteasome in platelets makes it unlikely that loss of proteasome function is a relevant cause of storage lesions.
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Affiliation(s)
- Lisa Colberg
- Institut für Immunologie und Transfusionsmedizin, Universitätsmedizin Greifswald, Greifswald, Germany.,Friedrich Loeffler-Institut für Medizinische Mikrobiologie-Virologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Clemens Cammann
- Friedrich Loeffler-Institut für Medizinische Mikrobiologie-Virologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Jan Wesche
- Institut für Immunologie und Transfusionsmedizin, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Eylin Topfstedt
- Friedrich Loeffler-Institut für Medizinische Mikrobiologie-Virologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Ulrike Seifert
- Friedrich Loeffler-Institut für Medizinische Mikrobiologie-Virologie, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Andreas Greinacher
- Institut für Immunologie und Transfusionsmedizin, Universitätsmedizin Greifswald, Greifswald, Germany
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12
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Ebermeyer T, Cognasse F, Berthelot P, Mismetti P, Garraud O, Hamzeh-Cognasse H. Platelet Innate Immune Receptors and TLRs: A Double-Edged Sword. Int J Mol Sci 2021; 22:ijms22157894. [PMID: 34360659 PMCID: PMC8347377 DOI: 10.3390/ijms22157894] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/14/2021] [Accepted: 07/20/2021] [Indexed: 12/17/2022] Open
Abstract
Platelets are hematopoietic cells whose main function has for a long time been considered to be the maintenance of vascular integrity. They have an essential role in the hemostatic response, but they also have functional capabilities that go far beyond it. This review will provide an overview of platelet functions. Indeed, stress signals may induce platelet apoptosis through proapoptotis or hemostasis receptors, necrosis, and even autophagy. Platelets also interact with immune cells and modulate immune responses in terms of activation, maturation, recruitment and cytokine secretion. This review will also show that platelets, thanks to their wide range of innate immune receptors, and in particular toll-like receptors, and can be considered sentinels actively participating in the immuno-surveillance of the body. We will discuss the diversity of platelet responses following the engagement of these receptors as well as the signaling pathways involved. Finally, we will show that while platelets contribute significantly, via their TLRs, to immune response and inflammation, these receptors also participate in the pathophysiological processes associated with various pathogens and diseases, including cancer and atherosclerosis.
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Affiliation(s)
- Théo Ebermeyer
- INSERM U1059-SAINBIOSE, Université de Lyon, F-42023 Saint-Etienne, France; (T.E.); (F.C.); (P.M.); (O.G.)
| | - Fabrice Cognasse
- INSERM U1059-SAINBIOSE, Université de Lyon, F-42023 Saint-Etienne, France; (T.E.); (F.C.); (P.M.); (O.G.)
- Etablissement Français du Sang Auvergne-Rhône-Alpes, 25 bd Pasteur, F-42100 Saint-Étienne, France
| | - Philippe Berthelot
- Team GIMAP, CIRI—Centre International de Recherche en Infectiologie, Université de Lyon, U1111, UMR5308, F-69007 Lyon, France;
- Infectious Diseases Department, CHU de St-Etienne, F-42055 Saint-Etienne, France
| | - Patrick Mismetti
- INSERM U1059-SAINBIOSE, Université de Lyon, F-42023 Saint-Etienne, France; (T.E.); (F.C.); (P.M.); (O.G.)
- Department of Vascular Medicine and Therapeutics, INNOVTE, CHU de St-Etienne, F-42055 Saint-Etienne, France
| | - Olivier Garraud
- INSERM U1059-SAINBIOSE, Université de Lyon, F-42023 Saint-Etienne, France; (T.E.); (F.C.); (P.M.); (O.G.)
| | - Hind Hamzeh-Cognasse
- INSERM U1059-SAINBIOSE, Université de Lyon, F-42023 Saint-Etienne, France; (T.E.); (F.C.); (P.M.); (O.G.)
- Correspondence:
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13
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Abstract
Platelet adhesion to the site of vascular damage is a critical early step in hemostasis. The platelet glycoprotein (GP) Ib-IX-V plays a key role in this step via its interaction with immobilized von Willebrand Factor (VWF). In addition to its well-known role in adhesion, GPIb-IX-V is critical for platelets' survival in circulation and plays an important role in the regulation of platelet clearance. Several mechanisms of platelet clearance work in concert to maintain a normal platelet count and ensure that circulating platelets are functionally viable via removal of senescent or activated platelets. Furthermore, dysregulation of platelet clearance underlies several bleeding disorders. GPIb-IX-V is central to many physiological mechanisms of platelet clearance including clearance via glycan receptors, clearance of VWF-platelet complexes, and fast clearance of transfused platelets. GPIb-IX-V dependent clearance also underlies thrombocytopenia in several bleeding disorders, including von Willebrand disease (VWD) and immune thrombocytopenia. This review will cover physiological and pathological mechanisms of platelet clearance, focusing on the role of GPIb-IX-V.
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Affiliation(s)
- M Edward Quach
- Stem Cell Program, Boston Children's Hospital, Boston, MA, USA.,Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
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14
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Zhou K, Xia Y, Yang M, Xiao W, Zhao L, Hu R, Shoaib KM, Yan R, Dai K. Actin polymerization regulates glycoprotein Ibα shedding. Platelets 2021; 33:381-389. [PMID: 33979555 DOI: 10.1080/09537104.2021.1922882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Glycoprotein (GP) Ibα shedding mediated by ADAM17 (a disintegrin and metalloproteinase 17) plays an important role in negatively regulating platelet function and thrombus formation. However, the mechanism of GPIbα shedding remains elusive. Here, we show that jasplakinolide (an actin-polymerizing peptide)-induced actin polymerization results in GPIbα shedding and impairs platelet function. Thrombin and A23187-induced GPIbα shedding is increased by jasplakinolide; in contrast, GPIbα shedding is reduced by a depolymerization regent (cytochalasin B). We find that actin polymerization activates calpain leading to filamin A hydrolyzation. We further demonstrate that the interaction of filamin A with the cytoplasmic domain of GPIbα plays a critical role in regulating actin polymerization-induced GPIbα shedding. Taken together, these data demonstrate that actin polymerization regulates ADAM17-mediated GPIbα shedding, suggesting a novel strategy to negatively regulate platelet function.
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Affiliation(s)
- Kangxi Zhou
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
| | - Yue Xia
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
| | - Mengnan Yang
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
| | - Weiling Xiao
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
| | - Lili Zhao
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
| | - Renping Hu
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
| | - Khan Muhammad Shoaib
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
| | - Rong Yan
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
| | - Kesheng Dai
- Medical College, Jiangsu Institute of Hematology, the First Affiliated Hospital and Collaborative Innovation Center of Hematology, State Key Laboratory of Radiation Medicine and Protection, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, Jiangsu, China
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15
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The Opportunities and Challenges regarding Induced Platelets from Human Pluripotent Stem Cells. Stem Cells Int 2021; 2021:5588165. [PMID: 34054969 PMCID: PMC8112939 DOI: 10.1155/2021/5588165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 04/14/2021] [Accepted: 04/19/2021] [Indexed: 12/30/2022] Open
Abstract
As a standard clinical treatment, platelet transfusion has been employed to prevent hemorrhage in patients with thrombocytopenia or platelet dysfunctions. Platelets also show therapeutic potential for aiding liver regeneration and bone healing and regeneration and for treating dermatological conditions. However, the supply of platelets rarely meets the rising clinical demand. Other issues, including short shelf life, strict storage temperature, and allogeneic immunity caused by frequent platelet transfusions, have become serious challenges that require the development of high-yielding alternative sources of platelets. Human pluripotent stem cells (hPSCs) are an unlimited substitution source for regenerative medicine, and patient-derived iPSCs can provide novel research models to explore the pathogenesis of some diseases. Many studies have focused on establishing and modifying protocols for generating functional induced platelets (iPlatelets) from hPSCs. To reach high efficiency production and eliminate the exogenous antigens, media supplements and matrix have been optimized. In addition, the introduction of some critical transgenes, such as c-MYC, BMI1, and BCL-XL, can also significantly increase hPSC-derived platelet production; however, this may pose some safety concerns. Furthermore, many novel culture systems have been developed to scale up the production of iPlatelets, including 2D flow systems, 3D rotary systems, and vertical reciprocal motion liquid culture bioreactors. The development of new gene-editing techniques, such as CRISPR/Cas9, can be used to solve allogeneic immunity of platelet transfusions by knocking out the expression of B2M. Additionally, the functions of iPlatelets were also evaluated from multiple aspects, including but not limited to morphology, structure, cytoskeletal organization, granule content, DNA content, and gene expression. Although the production and functions of iPlatelets are close to meeting clinical application requirements in both quantity and quality, there is still a long way to go for their large-scale production and clinical application. Here, we summarize the diverse methods of platelet production and update the progresses of iPlatelets. Furthermore, we highlight recent advances in our understanding of key transcription factors or molecules that determine the platelet differentiation direction.
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16
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Isola H, Ravanat C, Rudwill F, Pongerard A, Haas D, Eckly A, Gachet C, Hechler B. Removal of citrate from PAS-III additive solution improves functional and biochemical characteristics of buffy-coat platelet concentrates stored for 7 days, with or without INTERCEPT pathogen reduction. Transfusion 2021; 61:919-930. [PMID: 33527430 DOI: 10.1111/trf.16280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/17/2020] [Accepted: 12/21/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Deterioration in quality of platelet concentrates (PCs) during storage results from the appearance of storage lesions affecting the hemostatic functions and posttransfusion survival of platelets. These lesions depend on the preparation and pathogen inactivation methods used, duration of storage, and platelet additive solutions (PASs) present in storage bags. METHODS We investigated the effects of citrate contained in third-generation PAS (PAS-III) on storage lesions in buffy-coat PCs with or without photochemical (amotosalen-ultraviolet A) treatment over 7 days. RESULTS Platelet counts were conserved in all groups during storage, as was platelet swirling without appearance of macroscopic aggregates. Glycoprotein (GP) IIbIIIa and GPVI expression remained stable, whereas GPIbα declined similarly in all groups during storage. Removal of citrate from PAS-III, resulting in global reduction of citrate from 11 to 5 mM, led to a significant decrease in glucose consumption, which largely countered a modest deleterious effect of photochemical treatment. Citrate reduction also resulted in decreased lactate generation and better maintenance of pH during storage, while photochemical treatment had no impact on these parameters. Moreover, citrate-free storage significantly reduced exposure of P-selectin and the apoptosis signal phosphatidylserine, thereby abolishing the activating effect of photochemical treatment on both parameters. Citrate reduction benefited platelet aggregation to various agonists up to Day 7, whereas PCT had no impact on these responses. CONCLUSION Removal of citrate from PAS-III has a beneficial impact on platelet metabolism, spontaneous activation, and apoptosis, and improves platelet aggregation, irrespective of photochemical treatment, which should allow transfusion of platelets with better and longer-lasting functional properties.
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Affiliation(s)
- Hervé Isola
- INSERM, Etablissement Français du Sang (EFS) Grand Est, BPPS UMR_S 1255, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Catherine Ravanat
- INSERM, Etablissement Français du Sang (EFS) Grand Est, BPPS UMR_S 1255, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Floriane Rudwill
- INSERM, Etablissement Français du Sang (EFS) Grand Est, BPPS UMR_S 1255, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Anais Pongerard
- INSERM, Etablissement Français du Sang (EFS) Grand Est, BPPS UMR_S 1255, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Delphine Haas
- INSERM, Etablissement Français du Sang (EFS) Grand Est, BPPS UMR_S 1255, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Anita Eckly
- INSERM, Etablissement Français du Sang (EFS) Grand Est, BPPS UMR_S 1255, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Christian Gachet
- INSERM, Etablissement Français du Sang (EFS) Grand Est, BPPS UMR_S 1255, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Béatrice Hechler
- INSERM, Etablissement Français du Sang (EFS) Grand Est, BPPS UMR_S 1255, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
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17
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Generation and manipulation of human iPSC-derived platelets. Cell Mol Life Sci 2021; 78:3385-3401. [PMID: 33439272 PMCID: PMC7804213 DOI: 10.1007/s00018-020-03749-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/01/2020] [Accepted: 12/23/2020] [Indexed: 12/17/2022]
Abstract
The discovery of iPSCs has led to the ex vivo production of differentiated cells for regenerative medicine. In the case of transfusion products, the derivation of platelets from iPSCs is expected to complement our current blood-donor supplied transfusion system through donor-independent production with complete pathogen-free assurance. This derivation can also overcome alloimmune platelet transfusion refractoriness by resulting in autologous, HLA-homologous or HLA-deficient products. Several developments were necessary to produce a massive number of platelets required for a single transfusion. First, expandable megakaryocytes were established from iPSCs through transgene expression. Second, a turbulent-type bioreactor with improved platelet yield and quality was developed. Third, novel drugs that enabled efficient feeder cell-free conditions were developed. Fourth, the platelet-containing suspension was purified and resuspended in an appropriate buffer. Finally, the platelet product needed to be assured for competency and safety including non-tumorigenicity through in vitro and in vivo preclinical tests. Based on these advancements, a clinical trial has started. The generation of human iPSC-derived platelets could evolve transfusion medicine to the next stage and assure a ubiquitous, safe supply of platelet products. Further, considering the feasibility of gene manipulations in iPSCs, other platelet products may bring forth novel therapeutic measures.
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18
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Xiang B, Zhang G, Zhang Y, Wu C, Joshi S, Morris AJ, Ware J, Smyth SS, Whiteheart SW, Li Z. Calcium Ion Chelation Preserves Platelet Function During Cold Storage. Arterioscler Thromb Vasc Biol 2021; 41:234-249. [PMID: 33176450 PMCID: PMC8158249 DOI: 10.1161/atvbaha.120.314879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Platelet transfusion is a life-saving therapy to prevent or treat bleeding in patients with thrombocytopenia or platelet dysfunction. However, for >6 decades, safe and effective strategies for platelet storage have been an impediment to widespread use of platelet transfusion. Refrigerated platelets are cleared rapidly from circulation, precluding cold storage of platelets for transfusion. Consequently, platelets are stored at room temperature with an upper limit of 5 days due to risks of bacterial contamination and loss of platelet function. This practice severely limits platelet availability for transfusion. This study is to identify the mechanism of platelet clearance after cold storage and develop a method for platelet cold storage. Approach and Results: We found that rapid clearance of cold-stored platelets was largely due to integrin activation and apoptosis. Deficiency of integrin β3 or caspase-3 prolonged cold-stored platelets in circulation. Pretreatment of platelets with EGTA, a cell impermeable calcium ion chelator, reversely inhibited cold storage-induced platelet activation and consequently prolonged circulation of cold-stored platelets. Moreover, transfusion of EGTA-treated, cold-stored platelets, but not room temperature-stored platelets, into the mice deficient in glycoprotein Ibα significantly shortened tail-bleeding times and diminished blood loss. CONCLUSIONS Integrin activation and apoptosis is the underlying mechanism of rapid clearance of platelets after cold storage. Addition of a cell impermeable calcium ion chelator to platelet products is potentially a simple and effective method to enable cold storage of platelets for transfusion.
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Affiliation(s)
- Binggang Xiang
- Gill Heart and Vascular Institute, Division of Cardiovascular Medicine, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Guoying Zhang
- Gill Heart and Vascular Institute, Division of Cardiovascular Medicine, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Yan Zhang
- Gill Heart and Vascular Institute, Division of Cardiovascular Medicine, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Congqing Wu
- Gill Heart and Vascular Institute, Division of Cardiovascular Medicine, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Smita Joshi
- Department of Molecular and Cellular Biochemistry, University of Kentucky College of Medicine, Lexington, KY 40536, USA
| | - Andrew J. Morris
- Gill Heart and Vascular Institute, Division of Cardiovascular Medicine, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Jerry Ware
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Susan S. Smyth
- Gill Heart and Vascular Institute, Division of Cardiovascular Medicine, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
- Veterans Affairs Medical Center, Lexington, KY 40536, USA
| | - Sidney W. Whiteheart
- Department of Molecular and Cellular Biochemistry, University of Kentucky College of Medicine, Lexington, KY 40536, USA
| | - Zhenyu Li
- Gill Heart and Vascular Institute, Division of Cardiovascular Medicine, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
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19
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Wang Y, Chen W, Zhang W, Lee-Sundlov MM, Casari C, Berndt MC, Lanza F, Bergmeier W, Hoffmeister KM, Zhang XF, Li R. Desialylation of O-glycans on glycoprotein Ibα drives receptor signaling and platelet clearance. Haematologica 2021; 106:220-229. [PMID: 31974202 PMCID: PMC7776245 DOI: 10.3324/haematol.2019.240440] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 01/22/2020] [Indexed: 11/16/2022] Open
Abstract
During infection neuraminidase desialylates platelets and induces their rapid clearance from circulation. The underlying molecular basis, particularly the role of platelet glycoprotein (GP)Ibα therein, is not clear. Utilizing genetically altered mice, we report that the extracellular domain of GPIbα, but neither von Willebrand factor nor ADAM17 (a disintegrin and metalloprotease 17), is required for platelet clearance induced by intravenous injection of neuraminidase. Lectin binding to platelet following neuraminidase injection over time revealed that the extent of desialylation of O-glycans correlates with the decrease of platelet count in mice. Injection of α2,3-neuraminidase reduces platelet counts in wild-type but not in transgenic mice expressing only a chimeric GPIbα that misses most of its extracellular domain. Neuraminidase treatment induces unfolding of the O-glycosylated mechanosensory domain in GPIbα as monitored by single-molecule force spectroscopy, increases the exposure of the ADAM17 shedding cleavage site in the mechanosensory domain on the platelet surface, and induces ligand-independent GPIb-IX signaling in human and murine platelets. These results suggest that desialylation of O-glycans of GPIbα induces unfolding of the mechanosensory domain, subsequent GPIb-IX signaling including amplified desialylation of N-glycans, and eventually rapid platelet clearance. This new molecular mechanism of GPIbα-facilitated clearance could potentially resolve many puzzling and seemingly contradicting observations associated with clearance of desialylated or hyposialylated platelet.
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Affiliation(s)
- Yingchun Wang
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Wenchun Chen
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
| | - Wei Zhang
- Department of Bioengineering, Lehigh University, Bethlehem, PA
| | | | - Caterina Casari
- McAllister Heart Institute, University of North Carolina, School of Medicine, Chapel Hill, NC
| | | | - Francois Lanza
- Université de Strasbourg, EFS-Alsace, Strasbourg, France
| | | | | | - X Frank Zhang
- Department of Bioengineering, Lehigh University, Bethlehem, PA
| | - Renhao Li
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA
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20
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Quach ME, Li R. Structure-function of platelet glycoprotein Ib-IX. J Thromb Haemost 2020; 18:3131-3141. [PMID: 32735697 PMCID: PMC7854888 DOI: 10.1111/jth.15035] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/13/2020] [Accepted: 07/17/2020] [Indexed: 12/20/2022]
Abstract
The glycoprotein (GP)Ib-IX receptor complex plays a critical role in platelet physiology and pathology. Its interaction with von Willebrand factor (VWF) on the subendothelial matrix instigates platelet arrest at the site of vascular injury and is vital to primary hemostasis. Its reception to other ligands and counter-receptors in the bloodstream also contribute to various processes of platelet biology that are still being discovered. While its basic composition and its link to congenital bleeding disorders were well documented and firmly established more than 25 years ago, recent years have witnessed critical advances in the organization, dynamics, activation, regulation, and functions of the GPIb-IX complex. This review summarizes important findings and identifies questions that remain about this unique platelet mechanoreceptor complex.
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Affiliation(s)
- M Edward Quach
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, GA, USA
| | - Renhao Li
- Aflac Cancer and Blood Disorders Center, Department of Pediatrics, Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, GA, USA
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21
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Reddoch-Cardenas KM, Sharma U, Salgado CL, Cantu C, Darlington DN, Pidcoke HF, Bynum JA, Cap AP. Use of Specialized Pro-Resolving Mediators to Alleviate Cold Platelet Storage Lesion. Transfusion 2020; 60 Suppl 3:S112-S118. [PMID: 32478925 DOI: 10.1111/trf.15750] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/19/2020] [Accepted: 02/24/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND Cold-stored platelets are an attractive option for treatment of actively bleeding patients due to a reduced risk of septic complications and preserved hemostatic function compared to conventional room temperature-stored platelets. However, refrigeration causes increased platelet activation and aggregate formation. Specialized pro-resolving mediators (SPMs), cell signaling mediators biosynthesized from essential fatty acids, have been shown to modulate platelet function and activation. In this study, we sought to determine if SPMs could be used to inhibit cold-stored platelet activation. METHODS Platelets were collected from healthy donors (n = 4-7) and treated with SPMs (resolvin E1 [RvE1], maresin 1 [MaR1], and resolvin D2 [RvD2]) or vehicle (VEH; 0.1% EtOH). Platelets were stored without agitation in the cold and assayed on Days 0 and 7 of storage for platelet activation levels using flow cytometry, platelet count, aggregation response using impedance aggregometry, and nucleotide content using mass spectrometry. RESULTS Compared to VEH, SPM treatment inhibited GPIb shedding (all compounds), significantly reduced both PS exposure and activation of GPIIb/IIIa receptor (RvD2, MaR1), and preserved aggregation response to TRAP (RvD2, MaR1) after 7 days of storage. Similar to untreated cold-stored platelets, SPM-treated samples did not preserve platelet counts or block the release of P-Selectin. Nucleotide content was unaffected by SPM treatment in cold-stored platelets. CONCLUSIONS SPM treatment, particularly Mar1 and RvD2, led to reduced platelet activation and preserved platelet function after 7 days of storage in the cold. Future work is warranted to better elucidate the mechanism of action of SPMs on cold platelet function and activation.
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Affiliation(s)
- Kristin M Reddoch-Cardenas
- Coagulation and Blood Research Program, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
| | - Umang Sharma
- Coagulation and Blood Research Program, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
| | - Christi L Salgado
- Coagulation and Blood Research Program, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
| | - Carolina Cantu
- Coagulation and Blood Research Program, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
| | - Daniel N Darlington
- Coagulation and Blood Research Program, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
| | - Heather F Pidcoke
- Translational Medicine Institute, Colorado State University, Fort Collins, Colorado, USA
| | - James A Bynum
- Coagulation and Blood Research Program, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
| | - Andrew P Cap
- Coagulation and Blood Research Program, U.S. Army Institute of Surgical Research, Fort Sam Houston, Texas, USA
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22
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Pennell EN, Shiels R, Vidimce J, Wagner KH, Shibeeb S, Bulmer AC. The impact of bilirubin ditaurate on platelet quality during storage. Platelets 2019; 31:884-896. [PMID: 31747815 DOI: 10.1080/09537104.2019.1693038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Bilirubin ditaurate (BRT), a conjugated bilirubin analogue, has demonstrated anti-platelet characteristics following acute ex vivo exposure. Scavenging of mitochondrial superoxide and attenuation of granule exocytosis suggested a potential benefit for including BRT for storage. With no reports of cytotoxicity following acute exposure, the impact of 35µM BRT on platelet function was investigated, in clinically suppled units, for up to seven days. Exposure to 35µM BRT significantly reduced mitochondrial membrane potential and increased glucose consumption until exhaustion after 72 hours. Platelet aggregation and activation was significantly impaired by BRT. Mitochondrial superoxide production and phosphatidylserine expression were significantly elevated following glucose exhaustion, with decreased viability observed from day five onwards. Lactate accumulation and loss of bicarbonate, support a metabolic disturbance, leading to a decline of quality following BRT inclusion. Although acute ex vivo BRT exposure reported potentially beneficial effects, translation from acute to chronic exposure failed to combat declining platelet function during storage. BRT exposure resulted in perturbations of platelet quality, with the utility of BRT during storage therefore limited. However, these are the first data of prolonged platelet exposure to analogues of conjugated bilirubin and may improve our understanding of platelet function in the context of conjugated hyperbilirubinemia.
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Affiliation(s)
- Evan Noel Pennell
- School of Medical Science, Griffith University , Gold Coast, Australia
| | - Ryan Shiels
- School of Medical Science, Griffith University , Gold Coast, Australia
| | - Josif Vidimce
- School of Medical Science, Griffith University , Gold Coast, Australia
| | - Karl-Heinz Wagner
- Research Platform Active Aging, Department of Nutritional Science, University of Vienna , Vienna Austria
| | - Sapha Shibeeb
- School of Medical Science, Griffith University , Gold Coast, Australia.,Endeavour College of Natural Health , Melbourne, Australia
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23
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Hosseini E, Mohtashami M, Ghasemzadeh M. Down-regulation of platelet adhesion receptors is a controlling mechanism of thrombosis, while also affecting post-transfusion efficacy of stored platelets. Thromb J 2019; 17:20. [PMID: 31660046 PMCID: PMC6806620 DOI: 10.1186/s12959-019-0209-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 09/10/2019] [Indexed: 12/14/2022] Open
Abstract
Physiologically, upon platelet activation, uncontrolled propagation of thrombosis is prevented by regulating mechanisms which affect the expression and function of either platelet adhesion receptors or integrins. Receptor ectodomain shedding is an elective mechanism which is mainly involved in down-regulation of adhesion receptors GPIbα and GPVI. Platelet integrin αIIbβ3 can also be modulated with a calpain-dependent proteolytic cleavage. In addition, activating signals may induce the internalization of expressed receptors to selectively down-regulate their intensity. Alternatively, further activation of platelets is associated with microvesiculation as a none-selective mechanism which leads to the loss of membrane- bearing receptors. In a non-physiological condition, the storage of therapeutic platelets has also shown to be associated with the unwilling activation of platelets which triggers receptors down-regulation via aforementioned different mechanisms. Notably, herein the changes are time-dependent and not controllable. While the expression and shedding of pro-inflammatory molecules can induce post-transfusion adverse effects, stored-dependent loss of adhesion receptors by ectodomain shedding or microvesiculation may attenuate post-transfusion adhesive functions of platelets causing their premature clearance from circulation. In its first part, the review presented here aims to describe the mechanisms involved in down-regulation of platelet adhesion receptors. It then highlights the crucial role of ectodomain shedding and microvesiculation in the propagation of "platelet storage lesion" which may affect the post-transfusion efficacy of platelet components.
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Affiliation(s)
- Ehteramolsadat Hosseini
- 1Blood Transfusion Research Centre, High Institute for Research and Education in Transfusion Medicine, Iranian Blood Transfusion Organization Building, Hemmat Exp. Way, Next to the Milad Tower, PO Box: 14665-1157, Tehran, Iran
| | - Maryam Mohtashami
- 1Blood Transfusion Research Centre, High Institute for Research and Education in Transfusion Medicine, Iranian Blood Transfusion Organization Building, Hemmat Exp. Way, Next to the Milad Tower, PO Box: 14665-1157, Tehran, Iran
| | - Mehran Ghasemzadeh
- 1Blood Transfusion Research Centre, High Institute for Research and Education in Transfusion Medicine, Iranian Blood Transfusion Organization Building, Hemmat Exp. Way, Next to the Milad Tower, PO Box: 14665-1157, Tehran, Iran.,2Australian Center for Blood Diseases, Monash University, Melbourne, Victoria 3004 Australia
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24
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Bhatlekar S, Basak I, Edelstein LC, Campbell RA, Lindsey CR, Italiano JE, Weyrich AS, Rowley JW, Rondina MT, Sola-Visner M, Bray PF. Anti-apoptotic BCL2L2 increases megakaryocyte proplatelet formation in cultures of human cord blood. Haematologica 2019; 104:2075-2083. [PMID: 30733267 PMCID: PMC6886406 DOI: 10.3324/haematol.2018.204685] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 01/30/2019] [Indexed: 12/23/2022] Open
Abstract
Apoptosis is a recognized limitation to generating large numbers of megakaryocytes in culture. The genes responsible have been rigorously studied in vivo in mice, but are poorly characterized in human culture systems. As CD34-positive (+) cells isolated from human umbilical vein cord blood were differentiated into megakaryocytes in culture, two distinct cell populations were identified by flow cytometric forward and side scatter: larger size, lower granularity (LLG), and smaller size, higher granularity (SHG). The LLG cells were CD41aHigh CD42aHigh phosphatidylserineLow, had an electron microscopic morphology similar to mature bone marrow megakaryocytes, developed proplatelets, and displayed a signaling response to platelet agonists. The SHG cells were CD41aLowCD42aLowphosphatidylserineHigh, had a distinctly apoptotic morphology, were unable to develop proplatelets, and showed no signaling response. Screens of differentiating megakaryocytes for expression of 24 apoptosis genes identified BCL2L2 as a novel candidate megakaryocyte apoptosis regulator. Lentiviral BCL2L2 overexpression decreased megakaryocyte apoptosis, increased CD41a+ LLG cells, and increased proplatelet formation by 58%. An association study in 154 healthy donors identified a significant positive correlation between platelet number and platelet BCL2L2 mRNA levels. This finding was consistent with the observed increase in platelet-like particles derived from cultured megakaryocytes over-expressing BCL2L2 BCL2L2 also induced small, but significant increases in thrombin-induced platelet-like particle αIIbβ3 activation and P-selectin expression. Thus, BCL2L2 restrains apoptosis in cultured megakaryocytes, promotes proplatelet formation, and is associated with platelet number. BCL2L2 is a novel target for improving megakaryocyte and platelet yields in in vitro culture systems.
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Affiliation(s)
- Seema Bhatlekar
- Program in Molecular Medicine and Department of Internal Medicine, University of Utah, Salt Lake City, UT
| | - Indranil Basak
- Program in Molecular Medicine and Department of Internal Medicine, University of Utah, Salt Lake City, UT
| | - Leonard C Edelstein
- Cardeza Foundation for Hematologic Research, Thomas Jefferson University, Philadelphia, PA
| | - Robert A Campbell
- Program in Molecular Medicine and Department of Internal Medicine, University of Utah, Salt Lake City, UT
| | - Cory R Lindsey
- Cardeza Foundation for Hematologic Research, Thomas Jefferson University, Philadelphia, PA
| | | | - Andrew S Weyrich
- Program in Molecular Medicine and Department of Internal Medicine, University of Utah, Salt Lake City, UT
| | - Jesse W Rowley
- Program in Molecular Medicine and Department of Internal Medicine, University of Utah, Salt Lake City, UT
| | - Matthew T Rondina
- Program in Molecular Medicine and Department of Internal Medicine, University of Utah, Salt Lake City, UT
- George E. Wahlen VAMC GRECC, Salt Lake City, UT
| | | | - Paul F Bray
- Program in Molecular Medicine and Department of Internal Medicine, University of Utah, Salt Lake City, UT
- Division of Hematology and Hematologic Malignancies, Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
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25
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Lei XH, Yang YQ, Ma CY, Duan EK. Induction of differentiation of human stem cells ex vivo: Toward large-scale platelet production. World J Stem Cells 2019; 11:666-676. [PMID: 31616542 PMCID: PMC6789181 DOI: 10.4252/wjsc.v11.i9.666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 05/12/2019] [Accepted: 08/27/2019] [Indexed: 02/06/2023] Open
Abstract
Platelet transfusion is one of the most reliable strategies to cure patients suffering from thrombocytopenia or platelet dysfunction. With the increasing demand for transfusion, however, there is an undersupply of donors to provide the platelet source. Thus, scientists have sought to design methods for deriving clinical-scale platelets ex vivo. Although there has been considerable success ex vivo in the generation of transformative platelets produced by human stem cells (SCs), the platelet yields achieved using these strategies have not been adequate for clinical application. In this review, we provide an overview of the developmental process of megakaryocytes and the production of platelets in vivo and ex vivo, recapitulate the key advances in the production of SC-derived platelets using several SC sources, and discuss some strategies that apply three-dimensional bioreactor devices and biochemical factors synergistically to improve the generation of large-scale platelets for use in future biomedical and clinical settings.
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Affiliation(s)
- Xiao-Hua Lei
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yi-Qing Yang
- Faculty of Laboratory Medical Science, Hebei North University, Zhangjiakou 075000, Hebei Province, China
| | - Chi-Yuan Ma
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - En-Kui Duan
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
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26
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Lei XH, Yang YQ, Ma CY, Duan EK. Induction of differentiation of human stem cellsex vivo: Toward large-scale platelet production. World J Stem Cells 2019. [DOI: dx.doi.org/10.4252/wjsc.v11.i9.666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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27
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Six KR, Devloo R, Compernolle V, Feys HB. Impact of cold storage on platelets treated with Intercept pathogen inactivation. Transfusion 2019; 59:2662-2671. [PMID: 31187889 PMCID: PMC6851707 DOI: 10.1111/trf.15398] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 05/23/2019] [Accepted: 05/23/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Pathogen inactivation and cold or cryopreservation of platelets (PLTs) both significantly affect PLT function. It is not known how PLTs function when both are combined. STUDY DESIGN AND METHODS Standard PLT concentrates (PCs) were compared to pathogen‐inactivated PCs treated with amotosalen photochemical treatment (AS‐PCT) when stored at room (RT, 22°C), cold (4°C, n = 6), or cryopreservation (−80°C, n = 8) temperatures. The impact of alternative storage methods on both arms was studied in flow cytometry, light transmittance aggregometry, and hemostasis in collagen‐coated microfluidic flow chambers. RESULTS Platelet aggregation of cold‐stored AS‐PCT PLTs was 44% ± 11% compared to 57% ± 14% for cold‐stored standard PLTs and 58% ± 21% for RT‐stored AS‐PCT PLTs. Integrin activation of cold‐stored AS‐PCT PLTs was 53% ± 9% compared to 77% ± 6% for cold‐stored standard PLTs and 69% ± 13% for RT‐stored AS‐PCT PLTs. Coagulation of cold‐stored AS‐PCT PLTs started faster under flow (836 ± 140 sec) compared to cold‐stored standard PLTs (960 ± 192 sec) and RT‐stored AS‐PCT PLTs (1134 ± 220 sec). Fibrin formation rate under flow was also highest for cold‐stored AS‐PCT PLTs. This was in line with thrombin generation in static conditions because cold‐stored AS‐PCT PLTs generated 297 ± 47 nmol/L thrombin compared to 159 ± 33 nmol/L for cold‐stored standard PLTs and 83 ± 25 nmol/L for RT‐stored AS‐PCT PLTs. So despite decreased PLT activation and aggregation, cold storage of AS‐PCT PLTs promoted coagulation. PLT aggregation of cryopreserved AS‐PCT PLTs (23% ± 10%) was not significantly different from cryopreserved standard PLTs (25% ± 8%). CONCLUSION This study shows that cold storage of AS‐PCT PLTs further affects PLT activation and aggregation but promotes (pro)coagulation. Increased procoagulation was not observed after cryopreservation.
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Affiliation(s)
- Katrijn R Six
- Transfusion Research Center, Belgian Red Cross-Flanders, Ghent, Belgium.,Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Rosalie Devloo
- Transfusion Research Center, Belgian Red Cross-Flanders, Ghent, Belgium
| | - Veerle Compernolle
- Transfusion Research Center, Belgian Red Cross-Flanders, Ghent, Belgium.,Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.,Blood Service of the Belgian Red Cross-Flanders, Mechelen, Belgium
| | - Hendrik B Feys
- Transfusion Research Center, Belgian Red Cross-Flanders, Ghent, Belgium.,Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
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28
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Zhang Q, Lu M, Wu MX. Potentials for prolonging shelf-life of platelets by near infrared low-level light. JOURNAL OF BIOPHOTONICS 2019; 12:e201800390. [PMID: 30561165 DOI: 10.1002/jbio.201800390] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/07/2018] [Accepted: 12/16/2018] [Indexed: 06/09/2023]
Abstract
Platelets are uniquely stored at room temperature, during which they gradually loss their quality owing to deteriorating functions of mitochondria over time. Given the well-documented beneficial effect of near infrared low-level light (LLL) on mitochondrial functions, we explored a potential for LLL to protect mitochondrial function and extend the shelf-life of platelets beyond the current 5 days. We found that exposure of a platelet-containing storage bag to 830 nm light-emitting diode (LED) light at 0.5 J/cm2 prior to storage could significantly retain a pH value and viability of the platelets stored for 8 days with improved quality compared to those stored similarly for 5 days in controls. The LLL inhibited reactive oxygen species (ROS) and lactate production, while sustaining ATP synthesis and mitochondrial membrane potential and morphology in the stored platelets. It also sustained aggregation capacity and in vivo survival of stored platelets, concomitant with no significant activation, as suggested by similar CD62p expression and enhanced agonist-induced aggregation and recovery following infusion in the presence compared to absence of LLL treatment. This simple, additive-free, cost-effective, noninvasive approach can be readily incorporated into the current platelet storage system to potentially improve quality of stored platelets.
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Affiliation(s)
- Qi Zhang
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts
- Department of Dermatology, Harvard Medical School, Boston, Massachusetts
| | - Min Lu
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts
- Department of Dermatology, Harvard Medical School, Boston, Massachusetts
| | - Mei X Wu
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts
- Department of Dermatology, Harvard Medical School, Boston, Massachusetts
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29
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30
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Enhancing functional platelet release in vivo from in vitro-grown megakaryocytes using small molecule inhibitors. Blood Adv 2019; 2:597-606. [PMID: 29545255 DOI: 10.1182/bloodadvances.2017010975] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 02/14/2018] [Indexed: 12/17/2022] Open
Abstract
In vitro-grown megakaryocytes for generating platelets may have value in meeting the increasing demand for platelet transfusions. Remaining challenges have included the poor yield and quality of in vitro-generated platelets. We have shown that infusing megakaryocytes leads to intrapulmonary release of functional platelets. A Src kinase inhibitor (SU6656), a Rho-associated kinase inhibitor (Y27632), and an aurora B kinase inhibitor (AZD1152) have been shown to increase megakaryocyte ploidy and in vitro proplatelet release. We now tested whether megakaryocytes generated from CD34+ hematopoietic cells in the presence of these inhibitors could enhance functional platelet yield following megakaryocyte infusion. As expected, all inhibitors increased megakaryocyte ploidy, size, and granularity, but these inhibitors differed in whether they injured terminal megakaryocytes: SU6656 was protective, whereas Y27632 and AZD1152 increased injury. Upon infusion, inhibitor-treated megakaryocytes released threefold to ninefold more platelets per initial noninjured megakaryocyte relative to control, but only SU6656-treated megakaryocytes had a significant increase in platelet yield when calculated based on the number of initial CD34+ cells; this was fourfold over nontreated megakaryocytes. The released platelets from drug-treated, but healthy, megakaryocytes contained similar percentages of young, uninjured platelets that robustly responded to agonists and were well incorporated into a growing thrombus in vivo as controls. These studies suggest that drug screens that select megakaryocytes with enhanced ploidy, cell size, and granularity may include a subset of drugs that can enhance the yield and function of platelets, and may have clinical application for ex vivo-generated megakaryocytes and platelet transfusion.
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31
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The Glycoprotein Ib-IX-V Complex. Platelets 2019. [DOI: 10.1016/b978-0-12-813456-6.00010-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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32
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33
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Mechanisms of receptor shedding in platelets. Blood 2018; 132:2535-2545. [DOI: 10.1182/blood-2018-03-742668] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 10/12/2018] [Indexed: 02/07/2023] Open
Abstract
Abstract
The ability to upregulate and downregulate surface-exposed proteins and receptors is a powerful process that allows a cell to instantly respond to its microenvironment. In particular, mobile cells in the bloodstream must rapidly react to conditions where infection or inflammation are detected, and become proadhesive, phagocytic, and/or procoagulant. Platelets are one such blood cell that must rapidly acquire and manage proadhesive and procoagulant properties in order to execute their primary function in hemostasis. The regulation of platelet membrane properties is achieved via several mechanisms, one of which involves the controlled metalloproteolytic release of adhesion receptors and other proteins from the platelet surface. Proteolysis effectively lowers receptor density and reduces the reactivity of platelets, and is a mechanism to control robust platelet activation. Recent research has also established clear links between levels of platelet receptors and platelet lifespan. In this review, we will discuss the current knowledge of metalloproteolytic receptor regulation in the vasculature with emphasis on the platelet receptor system to highlight how receptor density can influence both platelet function and platelet survival.
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34
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Wei G, Luo Q, Wang X, Wu X, Xu M, Ding N, Zhao Y, Zhong L, Wang J, Wu Y, Li X, Liu Y, Ju W, Li Z, Zeng L, Xu K, Qiao J. Increased GPIbα shedding from platelets treated with immune thrombocytopenia plasma. Int Immunopharmacol 2018; 66:91-98. [PMID: 30445311 DOI: 10.1016/j.intimp.2018.11.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 11/08/2018] [Accepted: 11/08/2018] [Indexed: 12/19/2022]
Abstract
Immune thrombocytopenia (ITP) is a heterogeneous autoimmune disease, characterized by accelerated platelet destruction/clearance or decreased platelet production. ADAM17-mediated platelet receptor GPIbα extracellular domain shedding has been shown to be involved in platelet clearance. Whether GPIbα shedding participates in the pathogenesis of ITP remains poorly understood. This study aims to investigate the role of GPIbα shedding in the development of ITP via incubating normal platelets with ITP plasma to mimic ITP in vivo environment. Plasma was isolated from ITP patients or healthy control and incubated with platelets in vitro followed by measuring GPIbα expression by flow cytometry and western blot, ADAM17 expression by western blot, ROS generation and platelet activation by flow cytometry. Compared with control plasma, ITP plasma-treated platelet displayed significantly reduced GPIbα surface expression, increased ADAM17 expression and ROS generation. However, metalloproteinase inhibitor GM6001 blocked the ITP-plasma-induced decrease in GPIbα surface expression, increase in ADAM17 expression and platelet activation. In addition, inhibitors of NADPH oxidase or mitochondria respiration significantly inhibited ROS generation from ITP plasma-treated platelets. Moreover, ROS inhibition or blocking FcγRIIa attenuated the decrease in GPIbα surface expression, platelet activation and ROS generation (for blocking FcγRIIa) in ITP plasma-treated platelets. In conclusion, ITP plasma induces platelet receptor GPIbα extracellular domain shedding, suggesting that it might participate in the pathogenesis of ITP and targeting it might be a novel approach for treating ITP.
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Affiliation(s)
- Guangyu Wei
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China
| | - Qi Luo
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China
| | - Xiamin Wang
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China
| | - Xiaoqing Wu
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, Xinyi City Hospital, Xuzhou, China
| | - Mengdi Xu
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China
| | - Ning Ding
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Yan Zhao
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Lamei Zhong
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Jurui Wang
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Yulu Wu
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China
| | - Xiaoqian Li
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Yun Liu
- Department of Clinical Laboratory, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Wen Ju
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China
| | - Zhenyu Li
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China
| | - Lingyu Zeng
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China
| | - Kailin Xu
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China.
| | - Jianlin Qiao
- Blood Diseases Institute, Xuzhou Medical University, Xuzhou, China; Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China; Key Laboratory of Bone Marrow Stem Cell, Jiangsu Province, Xuzhou, China.
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35
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Kumar PS, Chandrasekhar C, Srikanth L, Sarma PVGK. In vitro large scale production of megakaryocytes to functional platelets from human hematopoietic stem cells. Biochem Biophys Res Commun 2018; 505:168-175. [PMID: 30243726 DOI: 10.1016/j.bbrc.2018.09.090] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 09/14/2018] [Indexed: 12/18/2022]
Abstract
Megakaryocytopoiesis results in the formation of platelets, which are essential for hemostasis. Decreased production or increased destruction of platelets can cause thrombocytopenia, in which platelet transfusion is the mode of treatment. The present study is aimed in generation of megakaryocytes (MKs) and platelet from human hematopoietic stem cells (HSCs). The purity of HSCs was assessed through Flow cytometry and immunocytochemistry (ICC) studies. These pure HSCs were induced with thrombopoietin (TPO), similarly with Andrographis paniculata extract (APE) for 21 days to generate MKs. The APE is mainly composed of andrographolide which stimulates TPO from the liver, and this binds to CD110 present on the surface of HSCs and triggers the proliferation of HSCs and initiate higher MKs population subsequently, a large number of platelets. The results of the present study showed increased proliferation of HSCs grown in the presence of APE and revealed a high population of CD41a and CD42b positive MKs as enumerated by Flow cytometry compared with TPO induced MKs. These results also concurred with qRT-PCR and western blot analysis. The scanning electron microscopy (SEM) revealed the morphology of differentiated MKs and platelets were similar to human blood platelets. The differentiated MKs in APE exhibited polyploidy up to 32 N while TPO induced MKs showed polyploidy of 8 N, these results corroborated with colony forming unit assay. On thrombin stimulation, high expression of P-selectin (CD62p) and fibrinogen binding were detected in APE induced platelets. Autologous transplantation of platelets generated from APE may be a useful option in thrombocytopenia condition.
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Affiliation(s)
- Pasupuleti Santhosh Kumar
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, 517507, Andhra Pradesh, India
| | - Chodimella Chandrasekhar
- Department of Hematology, Sri Venkateswara Institute of Medical Sciences, Tirupati, 517507, Andhra Pradesh, India
| | - Lokanathan Srikanth
- Department of Biotechnology, Sri Venkateswara Institute of Medical Sciences, Tirupati, 517507, Andhra Pradesh, India
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36
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Affiliation(s)
- Joel S Bennett
- From the Hematology-Oncology Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia.
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37
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Cho J, Kim H, Song J, Cheong JW, Shin JW, Yang WI, Kim HO. Platelet storage induces accelerated desialylation of platelets and increases hepatic thrombopoietin production. J Transl Med 2018; 16:199. [PMID: 30021591 PMCID: PMC6052694 DOI: 10.1186/s12967-018-1576-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 07/13/2018] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Stored platelets undergo deleterious changes, referred to as platelet storage lesions (PSLs), which accelerate the desialylation of platelets and result in their phagocytosis and clearance by hepatic macrophages. Recent studies have reported that Ashwell-Morell receptor binds to desialylated platelets, thereby inducing hepatic thrombopoietin (TPO) production in a mouse model. Therefore, this study aimed to demonstrate these relationships between PSL and hepatic TPO production in human study. METHODS Platelet concentrates (PCs) were obtained from 5 healthy volunteers and the remaining were discarded samples from the blood bank. PCs were divided into two halves, and stored either at 22 or 4 °C. Experiments were conducted using serial samples. Desialylation was assessed using flow cytometry, and structural changes were visualized using electron microscopy. Following co-culture of HepG2 cells (HB-8065, ATCC) with isolated platelets, hepatic TPO production was determined using real-time quantitative polymerase chain reaction and the supernatant TPO level was measured using a Luminex kit. RESULTS For 5 days of storage duration, platelet counts were not influenced by the storage conditions, but the degree of desialylation was proportional to the storage duration. Significant changes in the platelet surface and structure according to storage conditions were noted in electron microscopy. HepG2 cells incubated with aged platelets expressed more TPO mRNA, and supernatant TPO levels were proportional to the storage duration. Refrigeration also influenced on the results of this study, but they were not statistically significant. CONCLUSIONS This is the first study to demonstrate that, in vitro, aging and refrigeration affect the integrity of human platelets, resulting in induction of hepatic TPO mRNA and protein expression.
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Affiliation(s)
- Jooyoung Cho
- Department of Laboratory Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722 South Korea
- Department of Laboratory Medicine, Yonsei University Wonju College of Medicine, Wonju, South Korea
| | - Hyunkyung Kim
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - Jaewoo Song
- Department of Laboratory Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722 South Korea
| | - June-Won Cheong
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Jeong Won Shin
- Department of Laboratory Medicine, Soonchunhyang University School of Medicine, Seoul, South Korea
| | - Woo Ick Yang
- Department of Pathology, Yonsei University College of Medicine, Seoul, South Korea
| | - Hyun Ok Kim
- Department of Laboratory Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722 South Korea
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38
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Intrinsic apoptosis circumvents the functional decline of circulating platelets but does not cause the storage lesion. Blood 2018; 132:197-209. [DOI: 10.1182/blood-2017-11-816355] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 05/07/2018] [Indexed: 01/21/2023] Open
Abstract
Key Points
BAK/BAX depletion in murine platelets reveals that intrinsic apoptosis is not required for the development of the platelet storage lesion. Restriction of platelet life span by intrinsic apoptosis is pivotal to maintain a functional, hemostatically reactive platelet population.
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39
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Protein kinase C signaling dysfunction in von Willebrand disease (p.V1316M) type 2B platelets. Blood Adv 2018; 2:1417-1428. [PMID: 29925524 DOI: 10.1182/bloodadvances.2017014290] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 05/17/2018] [Indexed: 01/22/2023] Open
Abstract
von Willebrand disease (VWD) type 2B is characterized by gain-of-function mutations in von Willebrand factor (VWF), enhancing its binding affinity for the platelet receptor glycoprotein (GP)Ibα. VWD type 2B patients display a bleeding tendency associated with loss of high-molecular-weight VWF multimers and variable thrombocytopenia. We recently demonstrated that a marked defect in agonist-induced activation of the small GTPase, Rap1, and integrin αIIbβ3 in VWD (p.V1316M) type 2B platelets also contributes to the bleeding tendency. Here, we investigated the molecular mechanisms underlying impaired platelet Rap1 signaling in this disease. Two distinct pathways contribute to Rap1 activation in platelets: rapid activation mediated by the calcium-sensing guanine nucleotide exchange factor CalDAG-GEF-I (CDGI) and sustained activation that is dependent on signaling by protein kinase C (PKC) and the adenosine 5'-diphosphate receptor P2Y12. To investigate which Rap1 signaling pathway is affected, we expressed VWF/p.V1316M by hydrodynamic gene transfer in wild-type and Caldaggef1-/- mice. Using αIIbβ3 integrin activation as a read-out, we demonstrate that platelet dysfunction in VWD (p.V1316M) type 2B affects PKC-mediated, but not CDGI-mediated, activation of Rap1. Consistently, we observed decreased PKC substrate phosphorylation and impaired granule release in stimulated VWD type 2B platelets. Interestingly, the defect in PKC signaling was caused by a significant increase in baseline PKC substrate phosphorylation in circulating VWD (p.V1316M) type 2B platelets, suggesting that the VWF-GPIbα interaction leads to preactivation and exhaustion of the PKC pathway. Consistent with PKC preactivation, VWD (p.V1316M) type 2B mice also exhibited marked shedding of platelet GPIbα. In summary, our studies identify altered PKC signaling as the underlying cause of platelet hypofunction in p.V1316M-associated VWD type 2B.
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40
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Zhang X, Yu S, Deng G, He Y, Li Q, Yu L, Yu Y. Effects of nitric oxide donor S-nitrosoglutathione on apoptosis of apheresis platelets. Hematology 2018; 23:574-580. [PMID: 29890936 DOI: 10.1080/10245332.2018.1483547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Xiongxin Zhang
- The Department of Anesthesiology, The First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, People’s Republic of China
| | - Shifang Yu
- The Department of Transfusion Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, People’s Republic of China
| | - Gang Deng
- The Ningbo Central Blood Station, Ningbo, People’s Republic of China
| | - Yunlei He
- The Ningbo Central Blood Station, Ningbo, People’s Republic of China
| | - Qiang Li
- The Department of Laboratory Medicine, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, People’s Republic of China
| | - Lu Yu
- The Ningbo Central Blood Station, Ningbo, People’s Republic of China
| | - Yong Yu
- The Department of Transfusion Medicine, Ningbo No. 2 Hospital, Ningbo, People’s Republic of China
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41
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Mechanisms of platelet clearance and translation to improve platelet storage. Blood 2018; 131:1512-1521. [PMID: 29475962 DOI: 10.1182/blood-2017-08-743229] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 01/28/2018] [Indexed: 02/01/2023] Open
Abstract
Hundreds of billions of platelets are cleared daily from circulation via efficient and highly regulated mechanisms. These mechanisms may be stimulated by exogenous reagents or environmental changes to accelerate platelet clearance, leading to thrombocytopenia. The interplay between antiapoptotic Bcl-xL and proapoptotic molecules Bax and Bak sets an internal clock for the platelet lifespan, and BH3-only proteins, mitochondrial permeabilization, and phosphatidylserine (PS) exposure may also contribute to apoptosis-induced platelet clearance. Binding of plasma von Willebrand factor or antibodies to the ligand-binding domain of glycoprotein Ibα (GPIbα) on platelets can activate GPIb-IX in a shear-dependent manner by inducing unfolding of the mechanosensory domain therein, and trigger downstream signaling in the platelet including desialylation and PS exposure. Deglycosylated platelets are recognized by the Ashwell-Morell receptor and potentially other scavenger receptors, and are rapidly cleared by hepatocytes and/or macrophages. Inhibitors of platelet clearance pathways, including inhibitors of GPIbα shedding, neuraminidases, and platelet signaling, are efficacious at preserving the viability of platelets during storage and improving their recovery and survival in vivo. Overall, common mechanisms of platelet clearance have begun to emerge, suggesting potential strategies to extend the shelf-life of platelets stored at room temperature or to enable refrigerated storage.
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42
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Arthur JF, Gardiner EE, Andrews RK, Al-Tamimi M. Focusing on plasma glycoprotein VI. Thromb Haemost 2017; 107:648-55. [DOI: 10.1160/th11-10-0745] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Accepted: 12/10/2011] [Indexed: 12/18/2022]
Abstract
SummaryNew methods for analysing both platelet and plasma forms of the platelet-specific collagen receptor, glycoprotein VI (GPVI) in experimental models or human clinical samples, and the development of the first therapeutic compounds based on dimeric soluble GPVI-Fc or anti-GPVI antibody-based constructs, coincide with increased understanding of the potential pathophysiological role of GPVI ligand binding and shedding. Platelet GPVI not only mediates platelet activation at the site of vascular injury where collagen is exposed, but is also implicated in the pathogenesis of other diseases, such as atherosclerosis and coagulopathy, rheumatoid arthritis and tumour metastasis. Here, we describe some of the critical mechanisms for generating soluble GPVI from platelets, and future avenues for exploiting this unique platelet-specific receptor for diagnosis and/or disease prevention.
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43
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Chen W, Druzak SA, Wang Y, Josephson CD, Hoffmeister KM, Ware J, Li R. Refrigeration-Induced Binding of von Willebrand Factor Facilitates Fast Clearance of Refrigerated Platelets. Arterioscler Thromb Vasc Biol 2017; 37:2271-2279. [PMID: 29097365 DOI: 10.1161/atvbaha.117.310062] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 10/23/2017] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Apheresis platelets for transfusion treatment are currently stored at room temperature because after refrigeration platelets are rapidly cleared on transfusion. In this study, the role of von Willebrand factor (VWF) in the clearance of refrigerated platelets is addressed. APPROACH AND RESULTS Human and murine platelets were refrigerated in gas-permeable bags at 4°C for 24 hours. VWF binding, platelet signaling events, and platelet post-transfusion recovery and survival were measured. After refrigeration, the binding of plasma VWF to platelets was drastically increased, confirming earlier studies. The binding was blocked by peptide OS1 that bound specifically to platelet glycoprotein (GP)Ibα and was absent in VWF-/- plasma. Although surface expression of GPIbα was reduced after refrigeration, refrigeration-induced VWF binding under physiological shear induced unfolding of the GPIbα mechanosensory domain on the platelet, as evidenced by increased exposure of a linear epitope therein. Refrigeration and shear treatment also induced small elevation of intracellular Ca2+, phosphatidylserine exposure, and desialylation of platelets, which were absent in VWF-/- platelets or inhibited by OS1, which is a monomeric 11-residue peptide (CTERMALHNLC). Furthermore, refrigerated VWF-/- platelets displayed increased post-transfusion recovery and survival than wild-type ones. Similarly, adding OS1 to transgenic murine platelets expressing only human GPIbα during refrigeration improved their post-transfusion recovery and survival. CONCLUSIONS Refrigeration-induced binding of VWF to platelets facilitates their rapid clearance by inducing GPIbα-mediated signaling. Our results suggest that inhibition of the VWF-GPIbα interaction may be a potential strategy to enable refrigeration of platelets for transfusion treatment.
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Affiliation(s)
- Wenchun Chen
- From the Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, GA (W.C., S.A.D., Y.W., C.D.J., R.L.); Department of Pediatrics (W.C., S.A.D., Y.W., C.D.J., R.L.) and Department of Pathology (C.D.J.), Emory University School of Medicine, Atlanta, GA; Blood Research Institute, BloodCenter of Wisconsin, Milwaukee (K.M.H.); and Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock (J.W.)
| | - Samuel A Druzak
- From the Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, GA (W.C., S.A.D., Y.W., C.D.J., R.L.); Department of Pediatrics (W.C., S.A.D., Y.W., C.D.J., R.L.) and Department of Pathology (C.D.J.), Emory University School of Medicine, Atlanta, GA; Blood Research Institute, BloodCenter of Wisconsin, Milwaukee (K.M.H.); and Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock (J.W.)
| | - Yingchun Wang
- From the Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, GA (W.C., S.A.D., Y.W., C.D.J., R.L.); Department of Pediatrics (W.C., S.A.D., Y.W., C.D.J., R.L.) and Department of Pathology (C.D.J.), Emory University School of Medicine, Atlanta, GA; Blood Research Institute, BloodCenter of Wisconsin, Milwaukee (K.M.H.); and Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock (J.W.)
| | - Cassandra D Josephson
- From the Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, GA (W.C., S.A.D., Y.W., C.D.J., R.L.); Department of Pediatrics (W.C., S.A.D., Y.W., C.D.J., R.L.) and Department of Pathology (C.D.J.), Emory University School of Medicine, Atlanta, GA; Blood Research Institute, BloodCenter of Wisconsin, Milwaukee (K.M.H.); and Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock (J.W.)
| | - Karin M Hoffmeister
- From the Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, GA (W.C., S.A.D., Y.W., C.D.J., R.L.); Department of Pediatrics (W.C., S.A.D., Y.W., C.D.J., R.L.) and Department of Pathology (C.D.J.), Emory University School of Medicine, Atlanta, GA; Blood Research Institute, BloodCenter of Wisconsin, Milwaukee (K.M.H.); and Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock (J.W.)
| | - Jerry Ware
- From the Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, GA (W.C., S.A.D., Y.W., C.D.J., R.L.); Department of Pediatrics (W.C., S.A.D., Y.W., C.D.J., R.L.) and Department of Pathology (C.D.J.), Emory University School of Medicine, Atlanta, GA; Blood Research Institute, BloodCenter of Wisconsin, Milwaukee (K.M.H.); and Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock (J.W.)
| | - Renhao Li
- From the Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta, GA (W.C., S.A.D., Y.W., C.D.J., R.L.); Department of Pediatrics (W.C., S.A.D., Y.W., C.D.J., R.L.) and Department of Pathology (C.D.J.), Emory University School of Medicine, Atlanta, GA; Blood Research Institute, BloodCenter of Wisconsin, Milwaukee (K.M.H.); and Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock (J.W.).
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44
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Zhao L, Liu J, He C, Yan R, Zhou K, Cui Q, Meng X, Li X, Zhang Y, Nie Y, Zhang Y, Hu R, Liu Y, Zhao L, Chen M, Xiao W, Tian J, Zhao Y, Cao L, Zhou L, Lin A, Ruan C, Dai K. Protein kinase A determines platelet life span and survival by regulating apoptosis. J Clin Invest 2017; 127:4338-4351. [PMID: 29083324 DOI: 10.1172/jci95109] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 09/21/2017] [Indexed: 11/17/2022] Open
Abstract
Apoptosis delimits platelet life span in the circulation and leads to storage lesion, which severely limits the shelf life of stored platelets. Moreover, accumulating evidence indicates that platelet apoptosis provoked by various pathological stimuli results in thrombocytopenia in many common diseases. However, little is known about how platelet apoptosis is initiated or regulated. Here, we show that PKA activity is markedly reduced in platelets aged in vitro, stored platelets, and platelets from patients with immune thrombocytopenia (ITP), diabetes, and bacterial infections. Inhibition or genetic ablation of PKA provoked intrinsic programmed platelet apoptosis in vitro and rapid platelet clearance in vivo. PKA inhibition resulted in dephosphorylation of the proapoptotic protein BAD at Ser155, resulting in sequestration of prosurvival protein BCL-XL in mitochondria and subsequent apoptosis. Notably, PKA activation protected platelets from apoptosis induced by storage or pathological stimuli and elevated peripheral platelet levels in normal mice and in a murine model of ITP. Therefore, these findings identify PKA as a homeostatic regulator of platelet apoptosis that determines platelet life span and survival. Furthermore, these results suggest that regulation of PKA activity represents a promising strategy for extending platelet shelf life and has profound implications for the treatment of platelet number-related diseases and disorders.
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Affiliation(s)
- Lili Zhao
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Jun Liu
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Chunyan He
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Rong Yan
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Kangxi Zhou
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Qingya Cui
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Xingjun Meng
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Xiaodong Li
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Yang Zhang
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Yumei Nie
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Yang Zhang
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Renping Hu
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Yancai Liu
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Lian Zhao
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China.,Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Mengxing Chen
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Weiling Xiao
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Jingluan Tian
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Yunxiao Zhao
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Lijuan Cao
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Ling Zhou
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Anning Lin
- Ben May Department for Cancer Research, The University of Chicago, Chicago, Illinois, USA
| | - Changgeng Ruan
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
| | - Kesheng Dai
- Jiangsu Institute of Hematology, The First Affiliated Hospital and Collaborative Innovation Center of Hematology, Soochow University, Key Laboratory of Thrombosis and Hemostasis, Ministry of Health, Suzhou, China
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45
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Choo HJ, Kholmukhamedov A, Zhou C, Jobe S. Inner Mitochondrial Membrane Disruption Links Apoptotic and Agonist-Initiated Phosphatidylserine Externalization in Platelets. Arterioscler Thromb Vasc Biol 2017; 37:1503-1512. [PMID: 28663253 PMCID: PMC5560492 DOI: 10.1161/atvbaha.117.309473] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 06/16/2017] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Phosphatidylserine exposure mediates platelet procoagulant function and regulates platelet life span. Apoptotic, necrotic, and integrin-mediated mechanisms have been implicated as intracellular determinants of platelet phosphatidylserine exposure. Here, we investigate (1) the role of mitochondrial events in platelet phosphatidylserine exposure initiated by these distinct stimuli and (2) the cellular interactions of the procoagulant platelet in vitro and in vivo. APPROACH AND RESULTS Key mitochondrial events were examined, including cytochrome c release and inner mitochondrial membrane (IMM) disruption. In both ABT-737 (apoptotic) and agonist (necrotic)-treated platelets, phosphatidylserine externalization was temporally correlated with IMM disruption. Agonist stimulation resulted in rapid cyclophilin D-dependent IMM disruption that coincided with phosphatidylserine exposure. ABT-737 treatment caused rapid cytochrome c release, eventually followed by caspase-dependent IMM disruption that again closely coincided with phosphatidylserine exposure. A nonmitochondrial and integrin-mediated mechanism has been implicated in the formation of a novel phosphatidylserine-externalizing platelet subpopulation. Using image cytometry, this subpopulation is demonstrated to be the result of the interaction of an aggregatory platelet and a procoagulant platelet rather than indicative of a novel intracellular mechanism regulating platelet phosphatidylserine externalization. Using electron microscopy, similar interactions between aggregatory and procoagulant platelets are demonstrated in vitro and in vivo within a mesenteric vein hemostatic thrombus. CONCLUSIONS Platelet phosphatidylserine externalization is closely associated with the mitochondrial event of IMM disruption identifying a common pathway in phosphatidylserine-externalizing platelets. The limited interaction of procoagulant platelets and integrin-active aggregatory platelets identifies a potential mechanism for procoagulant platelet retention within the hemostatic thrombus.
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Affiliation(s)
- Hyo-Jung Choo
- From the BloodCenter of Wisconsin, Milwaukee (A.K., S.J.); Emory University School of Medicine, Department of Pediatrics and Children's Healthcare of Atlanta, GA (H.-J.C., C.Z., S.J.); Emory University, School of Medicine, Department of Cell Biology, Atlanta, GA (H.-J.C.); and Medical College of Wisconsin, Department of Pediatrics, Milwaukee (S.J.)
| | - Andaleb Kholmukhamedov
- From the BloodCenter of Wisconsin, Milwaukee (A.K., S.J.); Emory University School of Medicine, Department of Pediatrics and Children's Healthcare of Atlanta, GA (H.-J.C., C.Z., S.J.); Emory University, School of Medicine, Department of Cell Biology, Atlanta, GA (H.-J.C.); and Medical College of Wisconsin, Department of Pediatrics, Milwaukee (S.J.)
| | - ChengZing Zhou
- From the BloodCenter of Wisconsin, Milwaukee (A.K., S.J.); Emory University School of Medicine, Department of Pediatrics and Children's Healthcare of Atlanta, GA (H.-J.C., C.Z., S.J.); Emory University, School of Medicine, Department of Cell Biology, Atlanta, GA (H.-J.C.); and Medical College of Wisconsin, Department of Pediatrics, Milwaukee (S.J.)
| | - Shawn Jobe
- From the BloodCenter of Wisconsin, Milwaukee (A.K., S.J.); Emory University School of Medicine, Department of Pediatrics and Children's Healthcare of Atlanta, GA (H.-J.C., C.Z., S.J.); Emory University, School of Medicine, Department of Cell Biology, Atlanta, GA (H.-J.C.); and Medical College of Wisconsin, Department of Pediatrics, Milwaukee (S.J.).
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46
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Stivala S, Gobbato S, Infanti L, Reiner MF, Bonetti N, Meyer SC, Camici GG, Lüscher TF, Buser A, Beer JH. Amotosalen/ultraviolet A pathogen inactivation technology reduces platelet activatability, induces apoptosis and accelerates clearance. Haematologica 2017; 102:1650-1660. [PMID: 28729303 PMCID: PMC5622849 DOI: 10.3324/haematol.2017.164137] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 07/13/2017] [Indexed: 01/03/2023] Open
Abstract
Amotosalen and ultraviolet A (UVA) photochemical-based pathogen reduction using the Intercept™ Blood System (IBS) is an effective and established technology for platelet and plasma components, which is adopted in more than 40 countries worldwide. Several reports point towards a reduced platelet function after Amotosalen/UVA exposure. The study herein was undertaken to identify the mechanisms responsible for the early impairment of platelet function by the IBS. Twenty-five platelet apheresis units were collected from healthy volunteers following standard procedures and split into 2 components, 1 untreated and the other treated with Amotosalen/UVA. Platelet impedance aggregation in response to collagen and thrombin was reduced by 80% and 60%, respectively, in IBS-treated units at day 1 of storage. Glycoprotein Ib (GpIb) levels were significantly lower in IBS samples and soluble glycocalicin correspondingly augmented; furthermore, GpIbα was significantly more desialylated as shown by Erythrina Cristagalli Lectin (ECL) binding. The pro-apoptotic Bak protein was significantly increased, as well as the MAPK p38 phosphorylation and caspase-3 cleavage. Stored IBS-treated platelets injected into immune-deficient nonobese diabetic/severe combined immunodeficiency (NOD/SCID) mice showed a faster clearance. We conclude that the IBS induces platelet p38 activation, GpIb shedding and platelet apoptosis through a caspase-dependent mechanism, thus reducing platelet function and survival. These mechanisms are of relevance in transfusion medicine, where the IBS increases patient safety at the expense of platelet function and survival.
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Affiliation(s)
- Simona Stivala
- Laboratory for Platelet Research, Center for Molecular Cardiology, University of Zurich, Switzerland.,Department of Internal Medicine, Cantonal Hospital Baden, Switzerland
| | - Sara Gobbato
- Laboratory for Platelet Research, Center for Molecular Cardiology, University of Zurich, Switzerland.,Department of Internal Medicine, Cantonal Hospital Baden, Switzerland
| | - Laura Infanti
- Regional Blood Transfusion Service of the Swiss Red Cross, Basel, Switzerland
| | - Martin F Reiner
- Laboratory for Platelet Research, Center for Molecular Cardiology, University of Zurich, Switzerland.,Department of Internal Medicine, Cantonal Hospital Baden, Switzerland
| | - Nicole Bonetti
- Laboratory for Platelet Research, Center for Molecular Cardiology, University of Zurich, Switzerland.,Department of Internal Medicine, Cantonal Hospital Baden, Switzerland
| | - Sara C Meyer
- Division of Hematology and Department of Biomedicine, University Hospital Basel, Switzerland
| | | | - Thomas F Lüscher
- Department of Cardiology, University Heart Center, University Hospital Zurich, Switzerland
| | - Andreas Buser
- Regional Blood Transfusion Service of the Swiss Red Cross, Basel, Switzerland
| | - Jürg H Beer
- Laboratory for Platelet Research, Center for Molecular Cardiology, University of Zurich, Switzerland .,Department of Internal Medicine, Cantonal Hospital Baden, Switzerland
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47
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Identifying and enriching platelet-producing human stem cell-derived megakaryocytes using factor V uptake. Blood 2017; 130:192-204. [PMID: 28455282 DOI: 10.1182/blood-2017-01-761049] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 04/14/2017] [Indexed: 12/21/2022] Open
Abstract
Stem cell-derived platelets have the potential to replace donor platelets for transfusion. Defining the platelet-producing megakaryocytes (MKs) within the heterogeneous MK culture may help to optimize the in vitro generation of platelets. Using 2 human stem cell models of megakaryopoiesis, we identified novel MK populations corresponding to distinct maturation stages. An immature, low granular (LG) MK pool (defined by side scatter on flow cytometry) gives rise to a mature high granular (HG) pool, which then becomes damaged by apoptosis and glycoprotein Ib α chain (CD42b) shedding. We define an undamaged HG/CD42b+ MK subpopulation, which endocytoses fluorescently labeled coagulation factor V (FV) from the media into α-granules and releases functional FV+CD42b+ human platelet-like particles in vitro and when infused into immunodeficient mice. Importantly, these FV+ particles have the same size distribution as infused human donor platelets and are preferentially incorporated into clots after laser injury. Using drugs to protect HG MKs from apoptosis and CD42b shedding, we also demonstrate that apoptosis precedes CD42b shedding and that apoptosis inhibition enriches the FV+ HG/CD42b+ MKs, leading to increased platelet yield in vivo, but not in vitro. These studies identify a transition between distinct MK populations in vitro, including one that is primed for platelet release. Technologies to optimize and select these platelet-ready MKs may be important to efficiently generate functional platelets from in vitro-grown MKs.
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FLI1 level during megakaryopoiesis affects thrombopoiesis and platelet biology. Blood 2017; 129:3486-3494. [PMID: 28432223 DOI: 10.1182/blood-2017-02-770958] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 04/14/2017] [Indexed: 12/17/2022] Open
Abstract
Friend leukemia virus integration 1 (FLI1), a critical transcription factor (TF) during megakaryocyte differentiation, is among genes hemizygously deleted in Jacobsen syndrome, resulting in a macrothrombocytopenia termed Paris-Trousseau syndrome (PTSx). Recently, heterozygote human FLI1 mutations have been ascribed to cause thrombocytopenia. We studied induced-pluripotent stem cell (iPSC)-derived megakaryocytes (iMegs) to better understand these clinical disorders, beginning with iPSCs generated from a patient with PTSx and iPSCs from a control line with a targeted heterozygous FLI1 knockout (FLI1+/-). PTSx and FLI1+/- iMegs replicate many of the described megakaryocyte/platelet features, including a decrease in iMeg yield and fewer platelets released per iMeg. Platelets released in vivo from infusion of these iMegs had poor half-lives and functionality. We noted that the closely linked E26 transformation-specific proto-oncogene 1 (ETS1) is overexpressed in these FLI1-deficient iMegs, suggesting FLI1 negatively regulates ETS1 in megakaryopoiesis. Finally, we examined whether FLI1 overexpression would affect megakaryopoiesis and thrombopoiesis. We found increased yield of noninjured, in vitro iMeg yield and increased in vivo yield, half-life, and functionality of released platelets. These studies confirm FLI1 heterozygosity results in pleiotropic defects similar to those noted with other critical megakaryocyte-specific TFs; however, unlike those TFs, FLI1 overexpression improved yield and functionality.
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Hosseini E, Ghasemzadeh M, Nassaji F, Jamaat ZP. GPVI modulation during platelet activation and storage: its expression levels and ectodomain shedding compared to markers of platelet storage lesion. Platelets 2016; 28:498-508. [PMID: 27778530 DOI: 10.1080/09537104.2016.1235692] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Platelet storage is associated with deleterious changes leading to the loss of platelet reactivity and response. During storage, platelets experience increased expression and shedding of P-selectin and CD40L as specific markers of platelet activation, whereas GPIbα decreases due to ectodomain shedding. As an important adhesive receptor, GPVI contributes significantly to thrombus formation while its expression and shedding levels during storage of platelet products have not been well characterized yet. This study investigated the modulation of GPVI during platelet storage. For this study, samples obtained from 10 PRP-platelet concentrates (PCs) were subjected to flow-cytometry analysis to examine the expression of platelet activation markers and GPVI on days 1, 3, and 5 post-storage. To examine the levels of etcodomain shedding of these molecules, microparticle (MP)-free supernatants were also analyzed by either ELISA or Western blot methods. According to results, the expression levels of P-selectin and CD40L as well as the amounts of their soluble forms significantly increased during storage. The expression of GPIbα and GPVI decreased whereas their shedding significantly increased post-storage. The expression and shedding levels of these two receptors were significantly correlated. Negative correlations between the expressions of GPIbα or GPVI and P-selectin have been observed whereas their shedding levels were significantly relevant together. In a control study, the use of biotinylated platelet resuspended in Tyrode's buffer in the presence of ionophore with/without EDTA, confirmed the role of calcium in receptors shedding. In citrated PRP-PCs, recalcification of platelets also enhanced shedding levels of both GPIbα and GPVI. Intriguingly, the shedding levels of GPVI in stored PRP-PCs were much higher than those of ionophore-treated controls obtained from washed platelets. The ratios of sGPVI in stored platelet to ionophore-treated controls were also at least six times higher than those of GPIbα during storage. In conclusion, here we showed significant decreases of GPVI expression associated with its increasing levels of shedding during storage, suggesting GPVI as a valid marker of platelet storage lesion. Importantly, we found higher levels of GPVI shedding in stored platelets than those of ionophore-treated non-stored control samples. This suggests whereas platelet receptor shedding is mainly modulated by calcium-dependent signals, either platelet-surface interactions with the container walls during storage or induced shear stress under long-term agitation, might be also involved in the excessive shedding of GPVI during the storage of PCs.
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Affiliation(s)
- Ehteramolsadat Hosseini
- a Blood Transfusion Research Center , High Institute for Research and Education in Transfusion Medicine , Tehran , Iran
| | - Mehran Ghasemzadeh
- a Blood Transfusion Research Center , High Institute for Research and Education in Transfusion Medicine , Tehran , Iran.,b Australian Centre for Blood Diseases , Monash University , Melbourne , Australia
| | - Fatemeh Nassaji
- a Blood Transfusion Research Center , High Institute for Research and Education in Transfusion Medicine , Tehran , Iran
| | - Zeynab Pirmohammad Jamaat
- a Blood Transfusion Research Center , High Institute for Research and Education in Transfusion Medicine , Tehran , Iran
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Chatterjee M, Gawaz M. Clinical significance of receptor shedding-platelet GPVI as an emerging diagnostic and therapeutic tool. Platelets 2016; 28:362-371. [PMID: 27753514 DOI: 10.1080/09537104.2016.1227062] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Platelet membrane bedecked with a wide array of receptors offers a platform to regulate platelet responsiveness, thrombotic propensity, inflammatory disposition, and immune reactivity under diverse pathophysiological conditions. Ectopic proteolytic cleavage of such receptors irreversibly inactivates receptor-mediated intracellular signaling governing cellular functions, further releases soluble fragments into circulation which might modulate functions of target cells. Glycoprotein VI-(GPVI) is a membrane glycoprotein expressed in platelets and megakaryocytes. Platelet GPVI surface expression is enhanced following acute ischemic events like myocardial infarction and cerebral stroke, serves as an imminent diagnostic tool independent of markers of tissue necrosis, and is associated with poor prognosis. Platelets undergo GPVI shedding and thereby contribute to soluble plasma levels of sGPVI, with distinct diagnostic and prognostic attributes. This review summarizes the functional significance and mechanistic basis whereby GPVI surface availability is up- or downregulated on platelets and the impact of GPVI in diagnostic, prognostic, and therapeutic strategies in diseases where platelets play a regulatory role. Further, we also highlight how novel non-invasive platelet-based diagnostic and therapeutic strategies have evolved utilizing GPVI for lesion-directed antithrombotic therapy or to counteract atherosclerotic disposition to ameliorate care of patients particularly in the context of cardio-cerebro-vascular medicine.
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Affiliation(s)
- Madhumita Chatterjee
- a Innere Medizin III, Kardiologie und Kreislauferkrankungen , Eberhard Karls Universität , Tübingen , Germany
| | - Meinrad Gawaz
- a Innere Medizin III, Kardiologie und Kreislauferkrankungen , Eberhard Karls Universität , Tübingen , Germany
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