1
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Tefferi A, Barbui T. Polycythemia vera: 2024 update on diagnosis, risk-stratification, and management. Am J Hematol 2023; 98:1465-1487. [PMID: 37357958 DOI: 10.1002/ajh.27002] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 06/12/2023] [Indexed: 06/27/2023]
Abstract
DISEASE OVERVIEW Polycythemia vera (PV) is a JAK2-mutated myeloproliferative neoplasm characterized by clonal erythrocytosis; other features include leukocytosis, thrombocytosis, splenomegaly, pruritus, constitutional symptoms, microcirculatory disturbances, and increased risk of thrombosis and progression into myelofibrosis (post-PV MF) or acute myeloid leukemia (AML). DIAGNOSIS A working diagnosis is considered in the presence of a JAK2 mutation associated with hemoglobin/hematocrit levels of >16.5 g/dL/49% in men or 16 g/dL/48% in women; morphologic confirmation by bone marrow examination is advised but not mandated. CYTOGENETICS Abnormal karyotype is seen in 15%-20% of patients with the most frequent sole abnormalities being +9 (5%), loss of chromosome Y (4%), +8 (3%), and 20q- (3%). MUTATIONS Over 50% of patients harbor DNA sequence variants/mutations other than JAK2, with the most frequent being TET2 (18%) and ASXL1 (15%). Prognostically adverse mutations include SRSF2, IDH2, RUNX1, and U2AF1, with a combined incidence of 5%-10%. SURVIVAL AND PROGNOSIS Median survival is ⁓15 years but exceeds 35 years for patients aged ≤40 years. Risk factors for survival include older age, leukocytosis, abnormal karyotype, and the presence of adverse mutations. Twenty-year risk for thrombosis, post-PV MF, or AML are ⁓26%, 16% and 4%, respectively. RISK FACTORS FOR THROMBOSIS Two risk categories are considered: high (age >60 years or thrombosis history) and low (absence of both risk factors). Additional predictors for arterial thrombosis include cardiovascular risk factors and for venous thrombosis higher absolute neutrophil count and JAK2V617F allele burden. TREATMENT Current goal of therapy is to prevent thrombosis. Periodic phlebotomy, with a hematocrit target of <45%, combined with once- or twice-daily aspirin (81 mg) therapy, absent contraindications, is the backbone of treatment in all patients, regardless of risk category. Cytoreductive therapy is reserved for high-risk disease with first-line drugs of choice being hydroxyurea and pegylated interferon-α and second-line busulfan and ruxolitinib. In addition, systemic anticoagulation is advised in patients with venous thrombosis history. ADDITIONAL TREATMENT CONSIDERATIONS At the present time, we do not consider a drug-induced reduction in JAK2V617F allele burden, which is often incomplete and seen not only with peg-IFN but also with ruxolitinib and busulfan, as an indicator of disease-modifying activity, unless accompanied by cytogenetic and independently-verified morphologic remission. Accordingly, we do not use the specific parameter to influence treatment choices. The current review also includes specific treatment strategies in the context of pregnancy, splanchnic vein thrombosis, pruritus, perioperative care, and post-PV MF.
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Affiliation(s)
- Ayalew Tefferi
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Tiziano Barbui
- Research Foundation, Papa Giovanni XXIII Hospital, Bergamo, Italy
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2
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Kremers BMM, Daemen JHC, ten Cate H, Spronk HMH, Mees BME, ten Cate-Hoek AJ. Inadequate response to antiplatelet therapy in patients with peripheral artery disease: a prospective cohort study. Thromb J 2023; 21:5. [PMID: 36627677 PMCID: PMC9832392 DOI: 10.1186/s12959-022-00445-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 12/22/2022] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Patients with peripheral artery disease (PAD) are treated with preventive strategies to improve the cardiovascular risk. The incidence of cardiovascular events and mortality however remains high in PAD populations. We therefore aimed to better characterize PAD patients suffering from cardiovascular events and mortality in order to tailor preventive treatment. METHODS Between 2018 and 2020, 246 PAD outpatients (17 newly diagnosed, 229 with known PAD) were prospectively enrolled in this observational cohort study. Patient data and blood samples were collected after inclusion, and the primary composite endpoint (myocardial infarction, elective coronary revascularization, ischemic stroke, acute limb ischemia, mortality) was evaluated after one year. Secondary outcomes included platelet reactivity, measured using the VerifyNow assay, and medication adherence, assessed using the Morisky Medication Adherence Scale-8 (MMAS-8). Logistic regression models were used to identify associations between characteristics and the occurrence of events. RESULTS The cohort comprised 207 patients with claudication and 39 with chronic limb threatening ischemia. Twenty-six (10.6%) patients suffered from an event during follow-up. Prior myocardial infarction (OR 3.3 [1.4-7.7]), prior ischemic stroke (OR 4.5 [1.8-10.9]), higher levels of creatinine (OR 5.2 [2.2-12.6]), lower levels of high-density lipoprotein (OR 4.2 [1.5-10.6]) and lower haemoglobin levels (OR 3.1 [1.3-7.1]) were associated with events. Patients with events had more often high on-treatment platelet reactivity (HTPR) on aspirin (OR 5.9 [1.4-25.1]) or clopidogrel (OR 4.3 [1-19.3]). High adherence to medication was associated with the occurrence of events (OR 4.1 [1-18]). CONCLUSIONS Patients suffering from cardiovascular events and mortality were characterized by prior cardiovascular events as compared to patients who did not experience any events. Antiplatelet therapy was not optimally protective despite high medication adherence, and HTPR was independently associated with the occurrence of events. More research is needed on alternative treatment strategies such as dual antiplatelet therapy or combinations with anticoagulant drugs. TRIAL REGISTRATION The Medical Ethics Committee (METC) of the MUMC+ approved the study (NL63235.068.17) and the study was registered in the Netherlands Trial Register ( NTR7250 ).
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Affiliation(s)
- B. M. M. Kremers
- grid.5012.60000 0001 0481 6099Department of Biochemistry, Laboratory for Clinical Thrombosis and Hemostasis, Maastricht University, Maastricht, The Netherlands
| | - J. H. C. Daemen
- grid.412966.e0000 0004 0480 1382Department of Vascular Surgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - H. ten Cate
- grid.5012.60000 0001 0481 6099Department of Biochemistry, Laboratory for Clinical Thrombosis and Hemostasis, Maastricht University, Maastricht, The Netherlands ,grid.412966.e0000 0004 0480 1382Thrombosis Expertise Center, Maastricht University Medical Center, Maastricht, The Netherlands ,grid.412966.e0000 0004 0480 1382Department of Internal Medicine, Maastricht University Medical Center, Maastricht, The Netherlands ,grid.410607.4Center for Thrombosis and Hemostasis, Gutenberg University Medical Center, Mainz, Germany
| | - H. M. H. Spronk
- grid.5012.60000 0001 0481 6099Department of Biochemistry, Laboratory for Clinical Thrombosis and Hemostasis, Maastricht University, Maastricht, The Netherlands
| | - B. M. E. Mees
- grid.412966.e0000 0004 0480 1382Department of Vascular Surgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - A. J. ten Cate-Hoek
- grid.5012.60000 0001 0481 6099Department of Biochemistry, Laboratory for Clinical Thrombosis and Hemostasis, Maastricht University, Maastricht, The Netherlands ,grid.412966.e0000 0004 0480 1382Thrombosis Expertise Center, Maastricht University Medical Center, Maastricht, The Netherlands
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3
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Pedersen OB, Grove EL, Pasalic L, Ommen HB, Kristensen SD, Hvas AM. Cytoreductive treatment and association with platelet function and maturity in patients with essential thrombocythaemia. Br J Haematol 2022; 198:693-702. [PMID: 35675970 PMCID: PMC9540443 DOI: 10.1111/bjh.18303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/21/2022] [Accepted: 05/26/2022] [Indexed: 12/03/2022]
Abstract
Patients with essential thrombocythaemia (ET) have an increased risk of thromboembolic events, which may differ according to different cytoreductive drugs. We investigated the effect of cytoreductive treatment on platelet function and turnover in ET patients. Blood samples were obtained at 1 and 24 h after aspirin intake. Platelet function was evaluated by platelet aggregation and flow cytometry. Platelet turnover was assessed by immature platelet count, immature platelet fraction (IPF) and mean platelet volume (MPV). A total of 47 ET patients were included and grouped into 21 patients not receiving cytoreductive treatment, 15 patients receiving hydroxycarbamide and 11 patients receiving pegylated interferon alpha (peg‐IFN). Patients receiving peg‐IFN had significantly higher IPF and MPV than the other ET groups. Patients not receiving cytoreductive treatment had significantly higher platelet aggregation 24 h after aspirin intake than the other ET groups (p‐values from 0.03 to 0.0002). Patients receiving hydroxycarbamide had significantly higher expression of platelet granule makers, P‐selectin and CD63, than patients receiving peg‐IFN (p‐values ≤0.003). Cytoreduction provides more consistent platelet inhibition compared with no cytoreductive treatment. Moreover, peg‐IFN provides superior inhibition of platelet activation markers than hydroxycarbamide, which in part may explain differences in risk of thromboembolic events in ET patients.
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Affiliation(s)
- Oliver Buchhave Pedersen
- Thrombosis and Haemostasis Research Unit, Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark.,Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
| | - Erik Lerkevang Grove
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Leonardo Pasalic
- Institute of Clinical Pathology and Medical Research and the Departments of Clinical and Laboratory Haematology, Westmead Hospital, Sydney, Australia.,Westmead Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
| | - Hans Beier Ommen
- Department of Haematology, Aarhus University Hospital, Aarhus, Denmark
| | - Steen Dalby Kristensen
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Anne-Mette Hvas
- Thrombosis and Haemostasis Research Unit, Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
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4
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Tefferi A, Vannucchi AM, Barbui T. Polycythemia vera: historical oversights, diagnostic details, and therapeutic views. Leukemia 2021; 35:3339-3351. [PMID: 34480106 PMCID: PMC8632660 DOI: 10.1038/s41375-021-01401-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/17/2021] [Accepted: 08/23/2021] [Indexed: 02/07/2023]
Abstract
Polycythemia vera (PV) is a relatively indolent myeloid neoplasm with median survival that exceeds 35 years in young patients, but its natural history might be interrupted by thrombotic, fibrotic, or leukemic events, with respective 20-year rates of 26%, 16%, and 4%. Current treatment strategies in PV have not been shown to prolong survival or lessen the risk of leukemic or fibrotic progression and instead are directed at preventing thrombotic complications. In the latter regard, two risk categories are considered: high (age >60 years or thrombosis history) and low (absence of both risk factors). All patients require phlebotomy to keep hematocrit below 45% and once-daily low-dose aspirin, in the absence of contraindications. Cytoreductive therapy is recommended for high-risk or symptomatic low-risk disease; our first-line drug of choice in this regard is hydroxyurea but we consider pegylated interferon as an alternative in certain situations, including in young women of reproductive age, in patients manifesting intolerance or resistance to hydroxyurea therapy, and in situations where treatment is indicated for curbing phlebotomy requirement rather than preventing thrombosis. Additional treatment options include busulfan and ruxolitinib; the former is preferred in older patients and the latter in the presence of symptoms reminiscent of post-PV myelofibrosis or protracted pruritus. Our drug choices reflect our appreciation for long-term track record of safety, evidence for reduction of thrombosis risk, and broader suppression of myeloproliferation. Controlled studies are needed to clarify the added value of twice- vs once-daily aspirin dosing and direct oral anticoagulants. In this invited review, we discuss our current approach to diagnosis, prognostication, and treatment of PV in general, as well as during specific situations, including pregnancy and splanchnic vein thrombosis.
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Affiliation(s)
- Ayalew Tefferi
- Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN, USA.
| | - Alessandro M Vannucchi
- Department of Experimental and Clinical Medicine, CRIMM, Center Research and Innovation of Myeloproliferative Neoplasms, Azienda Ospedaliera Universitaria Careggi, University of Florence, Florence, Italy
| | - Tiziano Barbui
- Research Foundation, Papa Giovanni XXIII Hospital, Bergamo, Italy
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5
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Pedersen OB, Hvas AM, Ommen HB, Kristensen SD, Grove EL. Lower Antiplatelet Effect of Aspirin in Essential Thrombocythemia than in Coronary Artery Disease. TH OPEN 2021; 5:e230-e238. [PMID: 34235392 PMCID: PMC8255105 DOI: 10.1055/s-0041-1731309] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/16/2021] [Indexed: 01/02/2023] Open
Abstract
Background
Patients with essential thrombocythemia (ET) and coronary artery disease (CAD) have increased risk of thromboembolic complications. In addition, a reduced antiplatelet effect of aspirin has been demonstrated in both patient groups. As ET is a platelet disorder, platelets may be more important for the thromboembolic risk in ET than in CAD. We aimed to investigate the antiplatelet effect of aspirin and platelet turnover in ET versus CAD patients.
Methods
We included 48 ET patients and an age-matched group of 48 CAD patients. The effect of aspirin was evaluated by thromboxane B
2
(TXB
2
) levels and platelet aggregation. Platelet turnover was assessed by immature platelet count (IPC) and immature platelet fraction (IPF).
Results
ET patients had reduced effect of aspirin compared with CAD patients, demonstrated by significantly higher TXB
2
levels (median of differences = 22.3 ng/mL,
p
< 0.0001) and platelet aggregation (median of differences = 131.0 AU*min,
p
= 0.0003). Furthermore, ET patients had significantly higher IPC (
p
< 0.0001) and IPF (
p
= 0.0004) than CAD patients.
Conclusion
ET patients have lower 24-hour antiplatelet effect of aspirin than CAD patients. This may be explained by an increased platelet production and turnover counteracting the antiplatelet effect of aspirin. These findings strengthen the rationale for exploring novel antiplatelet regimens in ET patients to reduce the risk of cardiovascular events.
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Affiliation(s)
- Oliver Buchhave Pedersen
- Thrombosis and Haemostasis Research Unit, Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark.,Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
| | - Anne-Mette Hvas
- Thrombosis and Haemostasis Research Unit, Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Hans Beier Ommen
- Department of Hematology, Aarhus University Hospital, Aarhus, Denmark
| | - Steen Dalby Kristensen
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Erik Lerkevang Grove
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
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6
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Christiansen M, Grove EL, Hvas AM. Contemporary Clinical Use of Aspirin: Mechanisms of Action, Current Concepts, Unresolved Questions, and Future Perspectives. Semin Thromb Hemost 2021; 47:800-814. [PMID: 34130339 DOI: 10.1055/s-0041-1726096] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The ability of aspirin to inhibit platelet aggregation has positioned this agent within the most frequently used drugs worldwide. The aim of this article is to review the contemporary clinical use of aspirin and also to discuss unresolved issues not yet translated into clinical practice. Results from several clinical trials have led to strong guideline recommendations for aspirin use in the acute management and secondary prevention of cardiovascular disease. On the contrary, guidelines regarding aspirin use as primary prevention of cardiovascular disease are almost conservative, supported by recent trials reporting that the bleeding risk outweighs the potential benefits in most patients. In pregnancy, aspirin has proved efficient in preventing preeclampsia and small-for-gestational-age births in women at high risk, and is hence widely recommended in clinical guidelines. Despite the vast amount of clinical data on aspirin, several unresolved questions remain. Randomized trials have reported that aspirin reduces the risk of recurrent venous thromboembolism, but the clinical relevance remains limited, because direct oral anticoagulants are more effective. Laboratory studies suggest that a twice-daily dosing regimen or evening intake may lead to more efficient platelet inhibition, and the potential clinical benefit of such strategies is currently being explored in ongoing clinical trials. Enteric-coated formulations of aspirin are frequently used, but it remains unclear if they are safer and as efficient as plain aspirin. In the future, aspirin use after percutaneous coronary interventions might not be mandatory in patients who also need anticoagulant therapy, as several trials support shorter aspirin duration strategies. On the other hand, new treatment indications for aspirin will likely arise, as there is growing evidence that aspirin may reduce the risk of colorectal cancer and other types of cancer.
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Affiliation(s)
- Mikael Christiansen
- Department of Clinical Biochemistry, Regional Hospital in Horsens, Horsens, Denmark
| | - Erik Lerkevang Grove
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark.,Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark
| | - Anne-Mette Hvas
- Department of Clinical Medicine, Faculty of Health, Aarhus University, Aarhus, Denmark.,Department of Clinical Biochemistry, Aarhus University Hospital, Aarhus, Denmark
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7
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Abstract
PURPOSE OF REVIEW Thrombocytosis is common to all myeloproliferative neoplasms (MPN), including essential thrombocythemia (ET), polycythemia vera (PV), and myelofibrosis. Despite the traditionally held belief amongst many clinicians that thrombocytosis correlates with thrombosis risk, there is little evidence in the literature to support that claim. Herein we critically analyze the literature to better understand the relationship between thrombocytosis and risk of thrombosis in MPN. RECENT FINDINGS Both retrospective and prospective studies argue against associations between thrombocytosis and risk of thrombosis in patients with ET and PV. Rather, most studies suggest that the presence of extreme thrombocytosis is instead associated with an increased risk of hemorrhagic events, a paradoxical phenomenon with important clinical implications. Thrombosis risk has a multifactorial set of etiologies in MPNs. While qualitative abnormalities of the platelets may contribute, associations between platelet quantity and thrombosis risk are weak in MPN patients.
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8
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van Diemen JJK, Madsen MC, Vrancken P, de Bie K, van der Bom JG, Veen G, Bonten TN, Fuijkschot WW, Smulders YM, Thijs A. Evening aspirin intake results in higher levels of platelet inhibition and a reduction in reticulated platelets - a window of opportunity for patients with cardiovascular disease? Platelets 2020; 32:821-827. [PMID: 32838616 DOI: 10.1080/09537104.2020.1809643] [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] [Indexed: 01/08/2023]
Abstract
Cardiovascular events occur most frequently in the early morning. Similarly, the release of reticulated platelets (RP) by megakaryocytes has a peak in the late night and early morning. Which aspirin regimen most effectively inhibits platelets during these critical hours is unknown. Hence, the primary objective of this trial was to assess platelet function and RP levels at 8.00 AM, in stable cardiovascular (CVD) patients, during three different aspirin regimens. In this open-label randomized cross-over study subjects were allocated to three sequential aspirin regimens: once-daily (OD) 80 mg morning; OD-evening, and twice-daily (BID) 40 mg. Platelet function was measured at 8.00 AM & 8.00 PM by serum Thromboxane B2 (sTxB2) levels, the Platelet Function Analyzer (PFA)-200® Closure Time (CT), Aspirin Reaction Units (ARU, VerifyNow®), and RP levels. In total, 22 patients were included. At 8.00 AM, sTxB2 levels were the lowest after OD-evening in comparison with OD-morning (p = <0.01), but not in comparison with BID. Furthermore, RP levels were similar at 8.00 AM, but statistically significantly reduced at 8.00 PM after OD-evening (p = .01) and BID (p = .02) in comparison with OD-morning. OD-evening aspirin intake results in higher levels of platelet inhibition during early morning hours and results in a reduction of RP levels in the evening. These findings may, if confirmed by larger studies, be relevant to large groups of patients taking aspirin to reduce cardiovascular risk.
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Affiliation(s)
- J J K van Diemen
- Department of Internal Medicine, Amsterdam UMC, Location VU University, Amsterdam, The Netherlands
| | - M C Madsen
- Department of Internal Medicine, Amsterdam UMC, Location VU University, Amsterdam, The Netherlands
| | - P Vrancken
- Department of Internal Medicine, Amsterdam UMC, Location VU University, Amsterdam, The Netherlands
| | - K de Bie
- Department of Internal Medicine, Amsterdam UMC, Location VU University, Amsterdam, The Netherlands
| | - J G van der Bom
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands.,JJ Van Rood Center for Clinical Transfusion Research, Sanquin Research, Leiden, The Netherlands
| | - G Veen
- Department of Cardiology, Amsterdam UMC, Location VU University, Amsterdam, The Netherlands
| | - T N Bonten
- Department of Public Health & Primary Care, Leiden University Medical Center, Leiden, The Netherlands
| | - W W Fuijkschot
- Department of Internal Medicine, Amsterdam UMC, Location VU University, Amsterdam, The Netherlands
| | - Y M Smulders
- Department of Internal Medicine, Amsterdam UMC, Location VU University, Amsterdam, The Netherlands
| | - A Thijs
- Department of Internal Medicine, Amsterdam UMC, Location VU University, Amsterdam, The Netherlands
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9
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Kawada T. Genetic factors affecting thrombosis in patients with essential thrombocythemia by heparin treatment. J Thromb Thrombolysis 2019; 48:514-515. [DOI: 10.1007/s11239-019-01886-x] [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: 11/29/2022]
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10
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Parker WA, Orme RC, Hanson J, Stokes HM, Bridge CM, Shaw PA, Sumaya W, Thorneycroft K, Petrucci G, Porro B, Judge HM, Ajjan RA, Rocca B, Storey RF. Very-low-dose twice-daily aspirin maintains platelet inhibition and improves haemostasis during dual-antiplatelet therapy for acute coronary syndrome. Platelets 2019; 30:148-157. [PMID: 30759035 PMCID: PMC6425913 DOI: 10.1080/09537104.2019.1572880] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 01/04/2019] [Accepted: 01/11/2019] [Indexed: 01/11/2023]
Abstract
Higher aspirin doses may be inferior in ticagrelor-treated acute coronary syndrome (ACS) patients and reducing bleeding risk whilst maintaining antithrombotic benefits could improve outcomes. We characterized the pharmacodynamics of a novel dual-antiplatelet-therapy regimen consisting of very-low-dose twice-daily (BD) aspirin with standard-dose ticagrelor. A total of 20 ticagrelor-treated ACS patients entered a randomized crossover to take aspirin 20 mg BD (12-hourly) during one 14-day period and 75 mg once-daily (OD) in the other. After 14 days of treatment, serum thromboxane (TX)B2 and light-transmittance aggregometry were assessed pre- and 2 h post-morning-dose, bleeding time was measured post-dose, and TXA2 and prostacyclin stable metabolites were measured in urine collected 2 h post-morning-dose. Data are expressed as mean ± SD. After 14 days treatment, serum TXB2 levels were significantly greater 2 h post-dosing with aspirin 20 mg BD vs. 75 mg OD (3.0 ± 3.6 ng/mL vs. 0.8 ± 1.9 ng/mL; p = 0.018) whereas pre-dosing levels were not significantly different (3.5 ± 4.1 ng/mL vs. 2.5 ± 3.1 ng/mL, p = 0.23). 1-mmol/L arachidonic acid-induced platelet aggregation was similarly inhibited by both regimens pre-dose (8.5 ± 14.3% vs. 5.1 ± 3.6%, p = 0.24) and post-dose (8.7 ± 14.2% vs. 6.6 ± 5.3%; p = 0.41). Post-dose bleeding time was shorter with 20 mg BD (680 ± 306 s vs. 834 ± 386 s, p = 0.02). Urinary prostacyclin and TX metabolite excretion were not significantly different. In conclusion, compared to aspirin 75 mg OD, aspirin 20 mg BD provided consistent inhibition of platelet TXA2 release and aggregation, and improved post-dose hemostasis, in ticagrelor-treated ACS patients. Further studies are warranted to assess whether this regimen improves the balance of clinical efficacy and safety.
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Affiliation(s)
- William A.E. Parker
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Department of Cardiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Rachel C. Orme
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Department of Cardiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Jessica Hanson
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Hannah M. Stokes
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Claire M. Bridge
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Patricia A. Shaw
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Wael Sumaya
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Department of Cardiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Kirstie Thorneycroft
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Giovanna Petrucci
- Institute of Pharmacology, Catholic University School of Medicine, Rome, Italy
| | - Benedetta Porro
- Centro Cardiologico Monzino, Istituto di Ricovero e Cura a Carattere Scientifico Cardiologico Monzino, Milan, Italy
| | - Heather M. Judge
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
| | - Ramzi A. Ajjan
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Bianca Rocca
- Institute of Pharmacology, Catholic University School of Medicine, Rome, Italy
| | - Robert F. Storey
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, United Kingdom
- Department of Cardiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
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11
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Laboratory Monitoring of Antiplatelet Therapy. Platelets 2019. [DOI: 10.1016/b978-0-12-813456-6.00036-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Racca C, van Diemen JJK, Fuijkschot WW, Spit K, Bonten TN, Numans ME, van der Bom JG, Smulders YM, Thijs A. Aspirin intake in the morning is associated with suboptimal platelet inhibition, as measured by serum Thromboxane B2, during infarct-prone early-morning hours. Platelets 2018; 30:871-877. [DOI: 10.1080/09537104.2018.1528347] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Cati Racca
- Department of Internal Medicine, Amsterdam University Medical Center, VU University, Amsterdam, The Netherlands
| | | | - Wessel Willem Fuijkschot
- Department of Internal Medicine, Amsterdam University Medical Center, VU University, Amsterdam, The Netherlands
| | - Karlinde Spit
- Department of Internal Medicine, Amsterdam University Medical Center, VU University, Amsterdam, The Netherlands
| | - Tobias Nicolaas Bonten
- Department of Public Health & Primary Care, Leiden University Medical Center, Leiden, The Netherlands
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Mattijs Everard Numans
- Department of Public Health & Primary Care, Leiden University Medical Center, Leiden, The Netherlands
| | - Johanna Gerarda van der Bom
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
- JJ van Rood Center for Clinical Transfusion Research, Sanquin Research, Leiden, The Netherlands
| | - Yvo Michiel Smulders
- Department of Internal Medicine, Amsterdam University Medical Center, VU University, Amsterdam, The Netherlands
| | - Abel Thijs
- Department of Internal Medicine, Amsterdam University Medical Center, VU University, Amsterdam, The Netherlands
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