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Jimenez-Marco T, Castrillo A, Hierro-Riu F, Vicente V, Rivera J. Frozen and cold-stored platelets: reconsidered platelet products. Platelets 2021; 33:27-34. [PMID: 34423718 DOI: 10.1080/09537104.2021.1967917] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Platelet transfusion, both prophylactic and therapeutic, is a key element in modern medicine. Currently, the standard platelet product for clinical use is platelet concentrates at room temperature (20-24°C) under gentle agitation. As this temperature favors bacterial growth, storage is limited to 5-7 days, which result in high wastage rate, and complicates inventory and product availability at remote areas. Frozen and/or cold storage would ameliorate those disadvantages by reducing the risk of bacterial contamination and by extending the product shelf-life to weeks or even years. Consequently, the usefulness in transfusion medicine of platelet cryopreservation and refrigeration, two old and scarcely used platelet storage approaches, is reemerging. Indeed, there have been substantial recent research efforts to characterize both cold and cryopreserved platelets. Most recent studies indicate that cryopreserved and cold platelets display a pro-coagulant profile that may produce the rapid hemostatic response which is needed in bleeding patients. Thus, it seems appropriate that blood banks and blood transfusion centers explore the possibility of split platelet inventories consisting of platelets stored at room temperature and cryopreserved and cold-stored platelets.
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Affiliation(s)
- Teresa Jimenez-Marco
- Fundació Banc De Sang I Teixits De Les Illes Balears, Majorca, Spain.,Institut d'Investigació Sanitària Illes Balears (Idisba), Majorca, Spain
| | - Azucena Castrillo
- Axencia Galega De Sangue, Órganos E Tecidos. Santiago De Compostela, A Coruña, Spain
| | | | - Vicente Vicente
- Servicio De Hematología Y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional De Hemodonación, Universidad De Murcia, IMIB-Arrixaca, Murcia, Spain
| | - José Rivera
- Servicio De Hematología Y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional De Hemodonación, Universidad De Murcia, IMIB-Arrixaca, Murcia, Spain
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Fernández-Muñoz H, Plaza EM, Rivera-Caravaca JM, Candela MJ, Romera M, De Arriba F, Lozano ML, Vicente V, Heras I, Castilla-Llorente C, Rivera J. Comparative assessment of prophylactic transfusions of platelet concentrates obtained by the PRP or buffy-coat methods, in patients undergoing allogeneic hematopoietic stem cell transplantation. ACTA ACUST UNITED AC 2018; 23:712-718. [PMID: 29582705 DOI: 10.1080/10245332.2018.1455434] [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: 10/17/2022]
Abstract
OBJECTIVES Whole blood-derived platelet concentrates can be obtained by the platelet-rich plasma (PRP-PCs) or the buffy-coat (BC-PCs) method. Few studies have shown that BC-PCs display lower in vitro platelet activation, but scarce information exists regarding transfusion efficacy. We have performed a retrospective study assessing platelet transfusion in patients undergoing allogeneic hematopoietic cell transplantation (AHCT) in our clinic, before and after the implementation of BC-PCs. METHODS We reviewed clinical records corresponding to 70 PRP-PCs and 86 BC-PCs prophylactic transfusions, which were performed to 55 AHCT patients. Transfusion efficacy was assessed by the 24-h post-transfusion corrected count increment (24-h CCI) and bleeding events. Clinical factors affecting transfusion outcome were also investigated. RESULTS Clinical characteristics and the total number of platelet transfusions were similar among groups. Mean donor exposure was 5.8 and 5.0 in each single PRP-PCs and BC-PCs transfusion, respectively (p < 0.01). The 24-h CCI was significantly higher in patients transfused with BC-PCs than in those receiving PRP-PCs (8.3[2.7-13.4] vs. 4.7[1.3-8.1]; p < 0.01). Independent predictors of poor platelet transfusion response included diagnosis other than acute leukemia (HR 8.30; 95% CI 1.96-35.22; p = 0.004), splenomegaly (HR 8.75; 95% CI 2.77-27.60; p < 0.001), graft versus host disease prophylaxis different from cyclosporine A and methotrexate (HR 3.96; 95% CI 1.55-10.14; p = 0.004) and PRP-PCs transfusion (HR 4.54; 95% CI 1.72-12.01; p = 0.002). There were no differences between both groups regarding the bleeding events. CONCLUSION In the AHCT setting, we hypothesize that BC-PCs transfusion, when compared to PRP-PCs, results in higher CCI and reduced donor exposure, but provides no significant benefit regarding bleeding outcome.
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Affiliation(s)
- Hermógenes Fernández-Muñoz
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain.,b Servicio de Hematología y Hemoterapia , Hospital Universitario Rafael Méndez , Lorca , Spain
| | - Eva M Plaza
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain
| | - José Miguel Rivera-Caravaca
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain
| | - María José Candela
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain
| | - Marta Romera
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain.,c Servicio de Hematología y Hemoterapia , Hospital Universitario Santa Lucía , Cartagena , Spain
| | - Felipe De Arriba
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain
| | - María L Lozano
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain
| | - Vicente Vicente
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain
| | - Inmaculada Heras
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain
| | - Cristina Castilla-Llorente
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain.,d Service d' Hématologie , Institut Gustave Roussy , Villejuif , France
| | - José Rivera
- a Servicio de Hematología y Oncología Médica, Hospital Universitario Morales Meseguer, Centro Regional de Hemodonación , Universidad de Murcia, CIBERER, IMIB-Arrixaca , Murcia , Spain
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3
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Cumhur Cure M, Cure E, Yuce S, Yazici T, Karakoyun I, Efe H. Mean platelet volume and vitamin D level. Ann Lab Med 2014. [PMID: 24624344 DOI: 10.3343/alm.2014.34.2.98.] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Vitamin D deficiency and a high mean platelet volume (MPV) are related to cardiovascular disease. We investigated whether vitamin D deficiency is associated with high MPV. METHODS This study included 434 patients without chronic disease who were not taking vitamin D or calcium supplements. Vitamin D was measured by chemiluminescent microparticle immunoassay on the Architect-I2000 system (Abbott Diagnostics, USA), and MPV was measured on the Cell-Dyn Ruby analyzer (Abbott Diagnostics). Patients were divided into Groups 1 (138 [men/women, 46/92]), 2 (148 [men/women, 54/94]), and 3 (148 [men/women, 50/98]) according to vitamin D levels of <10 ng/mL, 10-20 ng/mL, and >20 ng/mL, respectively. RESULTS The vitamin D level in Group 1 (7.7±1.9 ng/mL) was lower than that in Group 2 (15.1±1.6 ng/mL, P<0.001) and Group 3 (25.6±6.3 ng/mL, P<0.001). The MPV in Group 3 (7.5±1.0 fL) was lower than that in Group 1 (8.1±1.1 fL, P<0.001) and Group 2 (7.9±1.0 fL, P=0.009). Linear regression analysis showed that low levels of vitamin D (β=-0.109, P=0.019) was independently associated with increased MPV. CONCLUSIONS There was a strong association between a low vitamin D level and a high MPV; therefore, vitamin D deficiency may be associated with increased MPV.
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Affiliation(s)
- Medine Cumhur Cure
- Department of Biochemistry, University of Recep Tayyip Erdogan, Rize, Turkey
| | - Erkan Cure
- Department of Internal Medicine, University of Recep Tayyip Erdogan, Rize, Turkey
| | - Suleyman Yuce
- Department of Internal Medicine, University of Recep Tayyip Erdogan, Rize, Turkey
| | - Tarkan Yazici
- Department of Biochemistry, University of Recep Tayyip Erdogan, Rize, Turkey
| | - Inanc Karakoyun
- Department of Biochemistry, Izmir Public Health Laboratory, Izmir, Turkey
| | - Hasan Efe
- Department of Biochemistry, University of Recep Tayyip Erdogan, Rize, Turkey
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4
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Cumhur Cure M, Cure E, Yuce S, Yazici T, Karakoyun I, Efe H. Mean platelet volume and vitamin D level. Ann Lab Med 2014; 34:98-103. [PMID: 24624344 PMCID: PMC3948840 DOI: 10.3343/alm.2014.34.2.98] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 09/12/2013] [Accepted: 12/17/2013] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Vitamin D deficiency and a high mean platelet volume (MPV) are related to cardiovascular disease. We investigated whether vitamin D deficiency is associated with high MPV. METHODS This study included 434 patients without chronic disease who were not taking vitamin D or calcium supplements. Vitamin D was measured by chemiluminescent microparticle immunoassay on the Architect-I2000 system (Abbott Diagnostics, USA), and MPV was measured on the Cell-Dyn Ruby analyzer (Abbott Diagnostics). Patients were divided into Groups 1 (138 [men/women, 46/92]), 2 (148 [men/women, 54/94]), and 3 (148 [men/women, 50/98]) according to vitamin D levels of <10 ng/mL, 10-20 ng/mL, and >20 ng/mL, respectively. RESULTS The vitamin D level in Group 1 (7.7±1.9 ng/mL) was lower than that in Group 2 (15.1±1.6 ng/mL, P<0.001) and Group 3 (25.6±6.3 ng/mL, P<0.001). The MPV in Group 3 (7.5±1.0 fL) was lower than that in Group 1 (8.1±1.1 fL, P<0.001) and Group 2 (7.9±1.0 fL, P=0.009). Linear regression analysis showed that low levels of vitamin D (β=-0.109, P=0.019) was independently associated with increased MPV. CONCLUSIONS There was a strong association between a low vitamin D level and a high MPV; therefore, vitamin D deficiency may be associated with increased MPV.
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Affiliation(s)
- Medine Cumhur Cure
- Department of Biochemistry, University of Recep Tayyip Erdogan, Rize, Turkey
| | - Erkan Cure
- Department of Internal Medicine, University of Recep Tayyip Erdogan, Rize, Turkey
| | - Suleyman Yuce
- Department of Internal Medicine, University of Recep Tayyip Erdogan, Rize, Turkey
| | - Tarkan Yazici
- Department of Biochemistry, University of Recep Tayyip Erdogan, Rize, Turkey
| | - Inanc Karakoyun
- Department of Biochemistry, Izmir Public Health Laboratory, Izmir, Turkey
| | - Hasan Efe
- Department of Biochemistry, University of Recep Tayyip Erdogan, Rize, Turkey
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5
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Cesar JM, Vecino AM. Survival and function of transfused platelets. Studies in two patients with congenital deficiencies of platelet membrane glycoproteins. Platelets 2009; 20:158-62. [DOI: 10.1080/09537100902751925] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Corral J, González-Conejero R, Martínez C, Rivera J, Lozano ML, Vicente V. Platelet aggregation through prothrombinase activation induced by non-aggregant doses of platelet agonists. Blood Coagul Fibrinolysis 2002; 13:95-103. [PMID: 11914651 DOI: 10.1097/00001721-200203000-00004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Activation of the prothrombinase complex, which catalyzes the formation of thrombin from prothrombin, is crucial for the (patho)physiological processes of hemostasis and thrombosis. We here report that washed platelets supplemented with prothrombin can be irreversibly aggregated with otherwise non-aggregant doses of adenosine diphosphate (10 micromol/l), thrombin (0.06 U/ml), or collagen (1 microg/ml). Prothrombinase-catalyzed prothrombin to thrombin conversion most probably supports this aggregation response, since inhibitors of thrombin (hirudin or heparin) and an inhibitor of activated factor X (DX-9065a) impair the response. A certain degree of agonist-induced platelet activation seems to be required for this prothrombin-supported aggregation response, since prothrombin alone does not induce aggregation, and blockade of glycoprotein Ia/IIa with a specific antibody inhibits the platelet aggregation response to collagen and prothrombin. These results may suggest that activation of the prothrombinase complex could be a common step of the platelet response to distinct agonists, which may be achieved at low levels of platelet stimulation.
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Affiliation(s)
- J Corral
- Unit of Hematology and Medical Oncology, Hospital General Universitario Morales Meseguer, Murcia, Spain
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7
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Fabris F, Soini B, Sartori R, Randi ML, Luzzatto G, Girolami A. Clinical and laboratory factors that affect the post-transfusion platelet increment. TRANSFUSION SCIENCE 2000; 23:63-8. [PMID: 10925055 DOI: 10.1016/s0955-3886(00)00064-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Transfusion of platelet concentrates (PC) reduced the incidence of fatal hemorrhages in several thrombocytopenic conditions. Unfortunately, long-term platelet supportive care may be complicated by the development of a state of refractoriness, resulting in inadequate recovery of functional platelets. PC handling, clinical conditions of the patients and alloimmunization are the main factors affecting refractoriness. We evaluated the post-transfusion platelet increase in 25 patients (M=6, F=19) with hypomegakaryocytic thrombocytopenia receiving random ABO-compatible PC within 24 h after collection. Quality of PC was assessed by platelet count, pH measuring, LDH release, glycocalicin levels, CD-62 and CD-42b expression. Besides history, clinical status and therapy, we searched for the presence of anti-HLA class 1 and anti-HPA 1-4-5 antibodies. Only six patients (24%) were refractory to PC transfusion, as assessed by a corrected count increment (CCI)<5000. Four of such six patients (67%) had anti-HLA antibodies, as compared to zero of 19 responders (P<0.02). No other investigated clinical or laboratory feature was significantly different in refractory and responsive patients. Although post-transfusion bleeding time was shorter in responders than in refractory patients (297.33+/-249.95 versus 673.33+/-409.96; P<0.02), it did not significantly change even in patients with adequate correct count increment. Our data confirm the importance of anti-HLA antibodies in determining adequate post-transfusion recovery or refractoriness.
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Affiliation(s)
- F Fabris
- Department of Medical and Surgical Sciences, University of Padua Medical School, Padua, Italy.
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8
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Lozano ML, Rivera J, Bermejo E, Corral J, Pérez E, Vicente V. In vitro analysis of platelet concentrates stored in the presence of modulators of 3',5' adenosine monophosphate, and organic anions. TRANSFUSION SCIENCE 2000; 22:3-11. [PMID: 10771373 DOI: 10.1016/s0955-3886(00)00002-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The storage of conventional platelet concentrates (PCs) under standard blood bank conditions is limited to five days, in part because longer storage periods lead to increasing damage in platelet integrity and functionality. The growing demand of PCs for clinical use, raises the interest to develop agents that would potentially permit a more extended period of storage. We have evaluated and compared the in vitro quality of PCs treated with: (1) Modulators of levels of cAMP (PGE1, foskolin, theophylline and isobutyl-methyl-xanthine [IBMX]); and (2) organic anions that function as alternative substrates of platelets (pyruvate and acetate). Platelet rich plasma (PRP) from pools (n = 6) of PCs was distributed into storage bags, and the agents to be tested were added, using saline as a control substance. PCs were stored at 22 degrees C with continuous agitation for up to 10 days. At 0, 5 and 10 days of storage, samples were analyzed for platelet counts, mean platelet volume (MPV), metabolic markers, and expression of glycoproteins (GPs). The addition of modulators of levels of cAMP, at the concentration used in the study, did not lead to substantial improvement in the parameters being evaluated, with respect to those in control units. The supplementation with organic anions, while not affecting the surface levels of GPs, favored the maintenance of metabolic values, such as pH, PCO2, and bicarbonate concentrations, as well as the preservation of MPV (p values < 0.05 respect to control units both at 5 and 10 days of storage). Our results indicate that while the use of modulators of levels of cAMP do not provide substantial benefit in the prevention of platelet storage lesions, organic anions have some advantageous effect in the storage promoted metabolic changes of PCs. These data might be considered when designing strategies to improve PC storage.
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Affiliation(s)
- M L Lozano
- Unit of Oncohematology and Hemotherapy, University General Hospital, School of Medicine, Murcia, Spain
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Lozano ML, Rivera J, Corral J, Gonzalez-Conejero R, Vicente V. Platelet cryopreservation using a reduced dimethyl sulfoxide concentration and second-messenger effectors as cryopreserving solution. Cryobiology 1999; 39:1-12. [PMID: 10458897 DOI: 10.1006/cryo.1999.2184] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cryopreservation of platelets is of great interest since it could extend to years the shelf life of therapeutic platelet concentrates (PCs) and facilitate stockpiling and inventory control in blood banking. We have compared the cryopreservation of PCs by the standard method using 6% Me(2)SO as cryoprotectant with the method of freezing employing low concentrations of Me(2)SO (2%) plus ThromboSol, a mixture of second-messenger effectors that protect platelets from cold damage. PC pools were treated either with 6% Me(2)SO or with ThromboSol and 2% Me(2)SO and then placed directly in a -80 degrees C freezer or in the vapor phase of a liquid nitrogen freezer (-120 degrees C). After storage for 1 week or for 3 months, samples were removed, thawed, and analyzed. Measurements included cell recovery, biochemical parameters, membrane glycoproteins (GPs), platelet aggregation, and binding of radiolabeled von Willebrand factor (vWF) and fibrinogen. PCs cryopreserved with ThromboSol and 2% Me(2)SO displayed a platelet recovery (90%) equivalent to those frozen with 6% Me(2)SO. Following either cryopreservation procedure, platelets showed increased surface expression of P-selectin and moderate loss of GP Ibalpha in comparison to fresh platelets. The aggregatory response to ristocetin and the binding of vWF were similar in platelets frozen by either procedure. Finally, both methods promoted comparable impairment of the reactivity of platelets to thrombin, aggregation and binding of fibrinogen and vWF, compared to that of fresh platelets. In summary, cryopreservation of PCs using reduced Me(2)SO concentration and ThromboSol yields platelets with in vitro functional characteristics equivalent to those of cells frozen with the conventional method using 6% Me(2)SO.
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Affiliation(s)
- M L Lozano
- Unit of Hematology, Hemotherapy and Clinical Oncology, School of Medicine, Centro Regional de Hemodonación, Murcia, 30003, Spain
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10
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Wang C, Mody M, Herst R, Sher G, Freedman J. Flow cytometric analysis of platelet function in stored platelet concentrates. TRANSFUSION SCIENCE 1999; 20:129-39. [PMID: 10539116 DOI: 10.1016/s0955-3886(99)00022-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Platelet activation occurs during the collection, processing and storage of platelet concentrates. The effect of the platelet activation on the functional state of stored platelets remains however undefined. We employed flow cytometric analysis to evaluate the extent of platelet activation and the physiological response to thrombin stimulation of platelets stored for up to five days under routine blood bank conditions. Platelet surface expression of the activation markers CD62 and CD63 was examined, along with modulation of platelet membrane glycoproteins (GP) Ib and IIbIIIa. Platelet dense granule content was determined using a mepacrine uptake assay and the extent of platelet microparticle generation was quantified. Thirteen random-donor platelet concentrates prepared under routine conditions by a platelet-rich-plasma protocol were examined. Platelets were found to be activated following preparation on day 1. Although a gradual increase was seen with increasing storage time, this was not statistically significant for CD62 or CD63 expression, GPIIbIIIa or GPIb modulation or dense granule release; the generation of platelet microparticles did, however, increase with increasing storage time. The characteristic increase in surface expression of CD62, CD63 and GPIIbIIIa and decrease in GPIb and dense granule content in response to thrombin stimulation was observed with all concentrates, but these measures of platelet functional reserve showed decreasing platelet function with increasing storage time. The results indicate that platelets are activated by day 1, likely as a consequence of manipulation during collection and processing, but are not further progressively activated with increasing storage time; they do, however, become relatively hypofunctional with increasing storage.
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Affiliation(s)
- C Wang
- Canadian Red Cross Blood Services, Toronto Centre, Canada
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Matsubayashi H, Weidner J, Miraglia CC, McIntyre JA. Platelet membrane early activation markers during prolonged storage. Thromb Res 1999; 93:151-60. [PMID: 10064270 DOI: 10.1016/s0049-3848(98)00173-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The relationship between platelet aging and early markers of membrane activation have not been defined clearly. Activation markers expressed during prolonged storage are similar if not identical to those that appear after exposure to thrombin. Using flow cytometry, we investigated platelet membrane expression of CD62P, CD63, and annexin V binding (i.e., loss of membrane asymmetry) in platelets stored for up to 11 days under standard blood banking conditions. We compared five apheresis platelets to two random donor platelet concentrates, and to one pooled platelet preparation from six single platelet concentrates before and after exposure to thrombin. CD62P, CD63 expression, and annexin V binding increased during storage albeit with different kinetics. The differential increments observed between resting and thrombin (1 unit/ml) activated platelets showed an inverse correlation to storage time for CD62P, CD63, and annexin V binding, which was identical to published survival curves. A difference between apheresis platelets and platelet concentrates was observed only on day 1. Our data indicate that the in vitro platelet reserve activity to thrombin activation mirrors that of radiolabeled platelet survival in vivo and that platelet cross-sectional residual life span can explain their diminished capacity to respond to thrombin as a function of viability.
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Affiliation(s)
- H Matsubayashi
- Transplantation Immunology Laboratory, Methodist Hospital of Indiana, Indianapolis 46202, USA
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12
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Rivera J, Lozano ML, Gonzalez-Conejero R, Corral J, De Arriba F, Vicente V. A radioreceptor assay for mass measurement of inositol (1,4,5)-trisphosphate using saponin-permeabilized outdated human platelets. Anal Biochem 1998; 256:117-21. [PMID: 9466804 DOI: 10.1006/abio.1997.2488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The binding of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] to saponin-permeabilized blood-bank-outdated human platelets, 6 days old, has been characterized (Kd = 3.8 nM; Bmax = 1.7 pmol/mg protein) and used to develop a novel radioreceptor assay which allows the measurement of the Ins(1,4,5)P3 content in resting or agonist-stimulated cells. This assay is as sensitive (0.25 pmol in a 0.25 ml volume), specific, and reproducible as previously proposed methods. In addition, obtaining large batches of the Ins(1,4,5)P3 binding protein by treating outdated platelets with saponin is simple and quick and uses otherwise discarded material. Moreover, the assay is considerably cheaper than commercially available kits. Using this method we confirmed that thrombin evokes a rapid, transient, and dose-dependent increase in the platelet concentration of Ins(1,4,5)P3.
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Affiliation(s)
- J Rivera
- Unit of Hematology and Hemotherapy, School of Medicine, Hospital General Universitario, Murcia, Spain
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