1
|
Regan IE, Cox D, Kelleher ST, McMahon CJ. The Effects of Aspirin dose in Children with Congenital and Acquired Heart Disease. Results from the Paediatric Study of Aspirin Efficacy using Diagnostic and Monitoring Tools (PAED-M). Pediatr Cardiol 2024:10.1007/s00246-024-03509-6. [PMID: 38755451 DOI: 10.1007/s00246-024-03509-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 04/23/2024] [Indexed: 05/18/2024]
Abstract
The optimal dose of aspirin required in children with congenital and acquired heart disease is not known. The primary aim of this prospective observational study was to evaluate the effects of aspirin dose on platelet inhibition. The secondary aim was to determine the prevalence and clinical predictors of aspirin non-responsiveness. Measurements were by Thromboelastography with Platelet Mapping (TEGPM) only in children less than 2 years (y) of age with particular emphasis on the parameter known as maximum amplitude with arachidonic acid (MAAA) and using both TEGPM, and light transmission aggregometry (LTA) in children greater than 2 y. We prospectively studied 101 patients with congenital and acquired cardiac disease who were receiving empirical doses of aspirin for a minimum of 4 weeks but no other antiplatelet agents. Patients were stratified according to dose concentration and age. There was a trend toward lower age in patients with no response or semi-response to aspirin. All patients were considered responsive to aspirin in the higher-dose quartile (Q4) with a median dose of 4.72 (4.18-6.05) mg/kg/day suggesting that patients in this age group may require 5 mg/kg/day as an empirical dose. In children > 2 y, there was no significant difference in inhibition found in patients dosed at higher doses in Q3 versus Q4 suggesting that patients in this cohort are responsive with 3 mg/kg/day dose. The current practices may lead to reduced platelet inhibition in some children due to under-dosing or overdosing in others. In conclusion, younger children require higher doses of aspirin. Laboratory assessment is warranted in this population to mitigate against under and overdosing.
Collapse
Affiliation(s)
- Irene E Regan
- Department of Coagulation/Haematology, Children's Health Ireland at Crumlin, Dublin, Ireland
- School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland
- National Children's Research Centre, Children's Health Ireland, Dublin, Ireland
| | - Dermot Cox
- School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons Ireland, Dublin, Ireland
| | - Sean T Kelleher
- Department of Paediatric Cardiology, Children's Health Ireland at Crumlin, Dublin, Ireland
| | - Colin J McMahon
- Department of Paediatric Cardiology, Children's Health Ireland at Crumlin, Dublin, Ireland.
- School of Medicine, University College Dublin, Belfield, Dublin 4, Ireland.
- School of Health Professions Education (SHE), Maastricht University, Maastricht, Netherlands.
- National Children's Research Centre, Children's Health Ireland, Dublin, Ireland.
| |
Collapse
|
2
|
Aspirin Resistance in Vascular Disease: A Review Highlighting the Critical Need for Improved Point-of-Care Testing and Personalized Therapy. Int J Mol Sci 2022; 23:ijms231911317. [PMID: 36232618 PMCID: PMC9570127 DOI: 10.3390/ijms231911317] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/17/2022] [Accepted: 09/21/2022] [Indexed: 11/16/2022] Open
Abstract
Aspirin resistance describes a phenomenon where patients receiving aspirin therapy do not respond favorably to treatment, and is categorized by continued incidence of adverse cardiovascular events and/or the lack of reduced platelet reactivity. Studies demonstrate that one in four patients with vascular disease are resistant to aspirin therapy, placing them at an almost four-fold increased risk of major adverse limb and adverse cardiovascular events. Despite the increased cardiovascular risk incurred by aspirin resistant patients, strategies to diagnose or overcome this resistance are yet to be clinically validated and integrated. Currently, five unique laboratory assays have shown promise for aspirin resistance testing: Light transmission aggregometry, Platelet Function Analyzer-100, Thromboelastography, Verify Now, and Platelet Works. Newer antiplatelet therapies such as Plavix and Ticagrelor have been tested as an alternative to overcome aspirin resistance (used both in combination with aspirin and alone) but have not proven to be superior to aspirin alone. A recent breakthrough discovery has demonstrated that rivaroxaban, an anticoagulant which functions by inhibiting active Factor X when taken in combination with aspirin, improves outcomes in patients with vascular disease. Current studies are determining how this new regime may benefit those who are considered aspirin resistant.
Collapse
|
3
|
Prodhan P, Steiner M, Greiten LE. Systemic-to-Pulmonary Artery Shunt Thromboprophylaxis: Searching for the Holy Grail. Pediatr Crit Care Med 2022; 23:757-759. [PMID: 36053038 DOI: 10.1097/pcc.0000000000003034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Parthak Prodhan
- Pediatric Cardiology/Pediatric Critical Care, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Marie Steiner
- Pediatric Cardiothoracic Surgery, University of Arkansas for Medical Sciences, Little Rock, AR
| | - Lawrence E Greiten
- Pediatric Critical Care/Pediatric Hematology-Oncology, University of Minnesota, Minneapolis, MN
| |
Collapse
|
4
|
Boucher AA, Heneghan JA, Jang S, Spillane KA, Abarbanell AM, Steiner ME, Meyer AD. A Narrative Review of Postoperative Anticoagulation Therapy for Congenital Cardiac Disease. Front Surg 2022; 9:907782. [PMID: 35774388 PMCID: PMC9237365 DOI: 10.3389/fsurg.2022.907782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/26/2022] [Indexed: 11/18/2022] Open
Abstract
Congenital heart disease encompasses a range of cardiac birth defects. Some defects require early and complex surgical intervention and post-operative thromboprophylaxis primarily for valve, conduit, and shunt patency. Antiplatelet and anticoagulant management strategies vary considerably and may or may not align with recognized consensus practice guidelines. In addition, newer anticoagulant agents are being increasingly used in children, but these medications are not addressed in most consensus statements. This narrative review evaluated the literature from 2011 through 2021 on the topic of postoperative thromboprophylaxis after congenital heart disease operations. The search was focused on the descriptions and results of pediatric studies for replacement and/or repair of heart valves, shunts, conduits, and other congenital heart disease operations. Wide variability in practice exists and, as was true a decade ago, few randomized controlled trials have been conducted. Aspirin, warfarin, and perioperative heparin remain the most commonly used agents with varying dosing, duration, and monitoring strategies, making comparisons difficult. Only recently have data on direct oral anticoagulants been published in children, suggesting evolving paradigms of care. Our findings highlight the need for more research to strengthen the evidence for standardized thromboprophylaxis strategies.
Collapse
Affiliation(s)
- Alexander A. Boucher
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
- Correspondence: Alexander A. Boucher Julia A. Heneghan
| | - Julia A. Heneghan
- Division of Critical Care, Department of Pediatrics, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
- Correspondence: Alexander A. Boucher Julia A. Heneghan
| | - Subin Jang
- Division of Pediatric Cardiac Surgery, Department of Surgery, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
| | - Kaitlyn A. Spillane
- Division of Critical Care, Department of Pediatrics, Long School of Medicine, University of Texas Health Science Center, San Antonio, TX, United States
| | - Aaron M. Abarbanell
- Division of Congenital Cardiac Surgery, Department of Cardiothoracic Surgery, Long School of Medicine, University of Texas Health Science Center, San Antonio, TX, United States
| | - Marie E. Steiner
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
- Division of Critical Care, Department of Pediatrics, University of Minnesota Masonic Children’s Hospital, Minneapolis, MN, United States
| | - Andrew D. Meyer
- Division of Critical Care, Department of Pediatrics, Long School of Medicine, University of Texas Health Science Center, San Antonio, TX, United States
| |
Collapse
|
5
|
Kanwal F, Ma M, Rehman MFU, Khan FU, Elizur SE, Batool AI, Wang CC, Tabassum T, Lu C, Wang Y. Aspirin Repurposing in Folate-Decorated Nanoparticles: Another Way to Target Breast Cancer. Front Mol Biosci 2022; 8:788279. [PMID: 35187067 PMCID: PMC8848101 DOI: 10.3389/fmolb.2021.788279] [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: 10/01/2021] [Accepted: 12/06/2021] [Indexed: 12/31/2022] Open
Abstract
Breast cancer affects more than 1 million women per year worldwide. Through this study, we developed a nanoparticle-based drug delivery system to target breast cancer cells. Aspirin has been found to inhibit thromboembolic diseases with its tumor-preventing activity. As a consequence, it relieves disease symptoms and severity. Here, mesoporous silica nanoparticles (MNPs) have been used to deliver aspirin to the tumor location. MNP-based aspirin in folic acid (F)-conjugated polydopamine (MNP-Asp-PD-PG-F) vehicles are prepared for targeted breast cancer therapy. The vehicle hinges on MNP altered with polymer polyethylene glycol (PG), polydopamine (PD), and F. The delivery vehicle was studied for in vitro drug release, cytotoxicity, and breast cancer cell proliferation. F-conjugated drug delivery vehicles let MNPs achieve an elevated targeting efficacy, ideal for cancer therapy. It was also observed that compared to free aspirin, our drug delivery system (MNP-Asp-PD-PG-F) has a higher cytotoxic and antiproliferative effect on breast cancer cells. The drug delivery system can be proposed as a targeted breast cancer therapy that could be further focused on other targeted cancer therapies. Delivering aspirin by the PD-PG-F system on the tumor sites promises a therapeutic potential for breast cancer treatment.
Collapse
Affiliation(s)
- Fariha Kanwal
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Mingming Ma
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Key Laboratory of Ocular Fundus Diseases, National Clinical Research Center for Eye Diseases, Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai Engineering Center for Precise Diagnosis and Treatment of Eye Diseases, Shanghai, China
| | - Muhammad Fayyaz ur Rehman
- Institute of Chemistry, University of Sargodha, Sargodha, Pakistan
- *Correspondence: Muhammad Fayyaz ur Rehman, ; Yao Wang,
| | - Fahim-ullah Khan
- Department of Biotechnology, University of Science and Technology, Bannu, Pakistan
| | - Shai E. Elizur
- IVF Unit, Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer and Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Aima Iram Batool
- Department of Zoology, University of Sargodha, Sargodha, Pakistan
| | - Chi Chiu Wang
- Department of Obstetrics and Gynecology, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Tahira Tabassum
- Department of Pathology, Sargodha Medical College, University of Sargodha, Sargodha, Pakistan
| | - Changrui Lu
- Department of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Yao Wang
- Department of Assisted Reproduction, School of Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University, Shanghai, China
- *Correspondence: Muhammad Fayyaz ur Rehman, ; Yao Wang,
| |
Collapse
|
6
|
Sikora J, Karczmarska-Wódzka A, Bugieda J, Sobczak P. The Importance of Platelets Response during Antiplatelet Treatment after Ischemic Stroke-Between Benefit and Risk: A Systematic Review. Int J Mol Sci 2022; 23:ijms23031043. [PMID: 35162965 PMCID: PMC8835275 DOI: 10.3390/ijms23031043] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 01/01/2023] Open
Abstract
Ischemic stroke is a disease related to abnormal blood flow that leads to brain dysfunction. The early and late phases of the disease are distinguished. A distinction is made between the early and late stages of the disease, and the best effect in treating an ischemic stroke is usually achieved within the first hours after the onset of symptoms. This review looked at studies platelet activity monitoring studies to determine the risks and benefits of various approaches including antiplatelet therapy. A study was conducted on recently published literature based on PRISMA. This review includes 32 research articles directly addressing the importance of monitoring platelet function during antiplatelet therapy (dual or monotherapy) after ischemic stroke. In patients with transient ischemic attack or ischemic stroke, antiplatelet therapy can reduce the risk of stroke by 11–15%, assuming that patients respond well. Secondary prevention results are dependent on platelet reactivity, meaning that patients do not respond equally to antiplatelet therapy. It is very important that aspirin-resistant patients can benefit from the use of dual antiplatelet therapy. The individualized approach to secondary stroke prevention is to administer the most appropriate drug at the correct dose and apply the optimal therapeutic procedure to the individual patient.
Collapse
Affiliation(s)
- Joanna Sikora
- Research and Education Unit for Experimental Biotechnology, Department of Transplantology and General Surgery, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (A.K.-W.); (J.B.)
- Correspondence: ; Tel.: +48-52-585-59-76; Fax: +48-52-585-43-80
| | - Aleksandra Karczmarska-Wódzka
- Research and Education Unit for Experimental Biotechnology, Department of Transplantology and General Surgery, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (A.K.-W.); (J.B.)
| | - Joanna Bugieda
- Research and Education Unit for Experimental Biotechnology, Department of Transplantology and General Surgery, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland; (A.K.-W.); (J.B.)
| | - Przemysław Sobczak
- Department of Laboratory Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, 85-094 Bydgoszcz, Poland;
| |
Collapse
|
7
|
Klaeske K, Dieterlen MT, Eifert S, Scholz U, Garbade J, Jawad K, Sieg F, Borger MA, Meyer AL. Device-induced platelet dysfunction in patients after left ventricular assist device implantation. J Thromb Haemost 2021; 19:1331-1341. [PMID: 33636040 DOI: 10.1111/jth.15279] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 01/26/2021] [Accepted: 02/22/2021] [Indexed: 12/22/2022]
Abstract
BACKGROUND Non-surgical bleeding (NSB) is a major complication after left ventricular assist device (LVAD) implantation. It has been reported that non-physiological shear stress caused by LVADs could alter platelet receptor expression, which leads to bleeding disorders caused by coagulation dysfunctions. OBJECTIVES Because bleeding diathesis could be multifactorial, we focused on the combined characterization of platelet receptor expression patterns and oxidative stress to compare patients with NSB and patients without coagulation disorder in a monocentric, prospective study. METHODS Blood samples were obtained from LVAD patients with NSB (bleeder group, n = 19) and without NSB (non-bleeder group, n = 20). The platelet receptors platelet endothelial cell adhesion molecule-1 (PECAM-1), glycoprotein (GP)Ibα, P-selectin, CD63, and GPIIb/IIIa, as well as the production of intraplatelet reactive oxygen species (ROS) were quantified by flow cytometry. Aggregation capacity was evaluated by aggregometry. RESULTS The surface expression level of P-selectin and GPIbα on platelets was decreased in bleeders (P-selectin: 465 ± 72 U; GPIbα: 435 ± 41 U) compared to non-bleeders (P-selectin: 859 ± 115 U, P < .01; GPIbα: 570 ± 49 U, p = .04). Additionally, the mean fluorescence intensity of ADP-stimulated P-selectin and PECAM-1 expressing platelets were reduced in bleeders (P-selectin: 944 ± 84 U; PECAM-1: 6722 ± 419 U) compared to non-bleeders (P-selectin: 1269 ± 130 U, P = .04; PECAM-1: 8542 ± 665 U, P = .03). Bleeders showed a higher amount of ROS formation in platelets (88.0 ± 2.6%) than non-bleeders (81.5 ± 2.1%, P = .05). CONCLUSIONS These findings suggested that changes of three platelet receptors (GPIbα, P-selectin, and PECAM-1) and elevated oxidative stress may play a role in patients with bleeding complications following LVAD implantation. These results might help to explain the high incidence of spontaneous hemorrhage during LVAD support through an altered platelet function.
Collapse
Affiliation(s)
- Kristin Klaeske
- University Department for Cardiac Surgery, Leipzig Heart Center, Helios Clinic, Leipzig, Germany
| | - Maja-Theresa Dieterlen
- University Department for Cardiac Surgery, Leipzig Heart Center, Helios Clinic, Leipzig, Germany
| | - Sandra Eifert
- University Department for Cardiac Surgery, Leipzig Heart Center, Helios Clinic, Leipzig, Germany
| | - Ute Scholz
- MVZ Labor Dr. Reising-Ackermann und Kollegen, Center of Hemostasis, Leipzig, Germany
| | - Jens Garbade
- University Department for Cardiac Surgery, Leipzig Heart Center, Helios Clinic, Leipzig, Germany
| | - Khalil Jawad
- University Department for Cardiac Surgery, Leipzig Heart Center, Helios Clinic, Leipzig, Germany
| | - Franz Sieg
- University Department for Cardiac Surgery, Leipzig Heart Center, Helios Clinic, Leipzig, Germany
| | - Michael A Borger
- University Department for Cardiac Surgery, Leipzig Heart Center, Helios Clinic, Leipzig, Germany
| | - Anna L Meyer
- Department of Cardiac Surgery, University Hospital Heidelberg, Heidelberg, Germany
| |
Collapse
|
8
|
Appleton JP, Richardson C, Dovlatova N, May J, Sprigg N, Heptinstall S, Bath PM. Remote platelet function testing using P-selectin expression in patients with recent cerebral ischaemia on clopidogrel. Stroke Vasc Neurol 2020; 6:103-108. [PMID: 32973115 PMCID: PMC8005903 DOI: 10.1136/svn-2020-000346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 05/05/2020] [Accepted: 07/14/2020] [Indexed: 12/13/2022] Open
Abstract
Background Antiplatelet agents reduce recurrence after cerebral ischaemia but are not effective in all patients, in part because of treatment resistance. The primary aim was to assess the proportion of patients who are insensitive to clopidogrel. The secondary aim was to assess the association between insensitivity to clopidogrel and recurrent cerebrovascular events. Methods Following written informed consent, independent patients with a recent non-cardioembolic ischaemic stroke or transient ischaemic attack, and taking clopidogrel, were enrolled. Platelet function was assessed with remote measurement of surface expression of P-selectin (CD62P) using commercial kits sensitive to aspirin or clopidogrel. Participants’ general practitioners provided details on recurrent vascular events at least 90 days later. Data are mean (SD) and median [IQR]. Resistance was defined as: aspirin median fluorescence (MF) >500 units, clopidogrel MF >860 units. Non-parametric descriptors and tests were used. Results 63 patients were recruited: mean age 64 (13.7) years, women 47%. At baseline, 59 (95%) patients were taking clopidogrel alone with 3 (5%) on combined clopidogrel and aspirin. Assessment of platelet surface P-selectin revealed: aspirin test 528 [317, 834], >500 54.8%; clopidogrel test 429 [303, 656], >860 11.3%. No participants on aspirin and clopidogrel showed aspirin resistance. Thirteen (20.6%) patients had a recurrent cerebrovascular event; those with an ischaemic stroke had a non-significantly higher baseline P-selectin using the clopidogrel test as compared with those with no recurrence: 626 [380, 801] versus 406 [265, 609], p=0.08. Conclusions Remote measurement of platelet function assessed using the platelet surface expression of P-selectin is feasible. 11% of patients taking clopidogrel showed resistance. No significant associations were noted between clopidogrel resistance and recurrent ischaemic events.
Collapse
Affiliation(s)
- Jason Philip Appleton
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK.,Stroke Division, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Carla Richardson
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK.,Stroke Division, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Natalia Dovlatova
- Platelet Solutions Ltd, Division of Clinical Neuroscience, Queen's Medical Centre, University of Nottingham, Nottingham, UK.,Platelet Research Group, Division of Clinical Neuroscience, Queen's Medical Centre, University of Nottingham, Nottingham, UK
| | - Jane May
- Platelet Solutions Ltd, Division of Clinical Neuroscience, Queen's Medical Centre, University of Nottingham, Nottingham, UK.,Platelet Research Group, Division of Clinical Neuroscience, Queen's Medical Centre, University of Nottingham, Nottingham, UK
| | - Nikola Sprigg
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK.,Stroke Division, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Stan Heptinstall
- Platelet Solutions Ltd, Division of Clinical Neuroscience, Queen's Medical Centre, University of Nottingham, Nottingham, UK.,Platelet Research Group, Division of Clinical Neuroscience, Queen's Medical Centre, University of Nottingham, Nottingham, UK
| | - Philip M Bath
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK .,Stroke Division, Nottingham University Hospitals NHS Trust, Nottingham, UK
| |
Collapse
|
9
|
Rolling CC, Tomada J, Frölich AM, Holst B, Holstein K, Voigtländer M, Janjetovic S, Haddad M, Renné T, Fiehler J, Bokemeyer C, Rolling T, Langer F. Comparison of acetylsalicylic acid and clopidogrel non-responsiveness assessed by light transmittance aggregometry and PFA-100® in patients undergoing neuroendovascular procedures. Clin Chem Lab Med 2020; 59:383-392. [PMID: 32866112 DOI: 10.1515/cclm-2020-0737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 08/03/2020] [Indexed: 12/28/2022]
Abstract
Objectives Dual platelet inhibition is commonly used for prevention of cardiovascular events in patients undergoing neuroendovascular procedures. Non-responsiveness to platelet inhibitors may be associated with adverse outcomes. The aim of this study was to evaluate the reliability of the platelet function analyzer PFA-100® in comparison to light transmittance aggregometry (LTA) for monitoring clopidogrel and acetylsalicylic acid (ASA) non-responsiveness in a cohort of patients treated for intracranial aneurysm or cranial artery stenosis. Methods Non-responsiveness to clopidogrel and ASA was assessed by LTA using adenosine diphosphate (ADP) and arachidonic acid and by PFA-100® with the ADP/prostaglandin E1 (PGE1) and collagen/epinephrine cartridges, respectively. Results A total of 203 patients (145 females; median age, 57 years) were analyzed. Agreement between the two tests was poor for clopidogrel non-responsiveness (ƙ=0.19) and not better than chance for ASA non-responsiveness (ƙ=0.01). Clopidogrel non-responsiveness by LTA and PFA-100® was associated with higher von Willebrand factor antigen and activity levels. ADP-induced platelet disaggregation was lower in patients with clopidogrel non-responsiveness as assessed by PFA-100®. Clopidogrel non-responsiveness by LTA was associated with a higher prevalence of diabetes and a higher body mass index (BMI). Adverse outcomes (death, thromboembolism, or in-stent thrombosis) occurred in 13% (n=26) of all patients independently of ASA and clopidogrel non-responsiveness as assessed by both devices. Conclusions Our results show that LTA and PFA-100® are not interchangeable in the assessment of ASA and clopidogrel non-responsiveness in patients undergoing neuroendovascular interventions.
Collapse
Affiliation(s)
- Christina C Rolling
- Department of Oncology/Hematology and BMT with Section of Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Julia Tomada
- Department of Oncology/Hematology and BMT with Section of Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Andreas M Frölich
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Brigitte Holst
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Katharina Holstein
- Department of Oncology/Hematology and BMT with Section of Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Minna Voigtländer
- Department of Oncology/Hematology and BMT with Section of Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Snjezana Janjetovic
- Department of Oncology/Hematology and BMT with Section of Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Munif Haddad
- Department of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Renné
- Department of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Carsten Bokemeyer
- Department of Oncology/Hematology and BMT with Section of Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thierry Rolling
- Division of Infectious Diseases, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florian Langer
- Department of Oncology/Hematology and BMT with Section of Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| |
Collapse
|
10
|
Abstract
: Platelets play a pivotal role in controlling hemorrhaging from vessels of the human body. The impairment of platelets may lead to the development of bleeding manifestations. Unraveling the precise defects of platelets by means of suitable laboratory methods paves the way for the effective control and management of platelet disorders. Choosing the most appropriate approach for the detection of platelet disorders may be difficult for a researcher or clinical internist when faced with ordering a platelet-function test. The aim of the current study was to provide a user-friendly overview of the advantages and disadvantages of the available detection systems. To reach this goal, 11 commonly used methods of studying platelet activity were evaluated and compared in detail. A literature search, with no time or language limitations, was conducted in Google Scholar and Medline. All publications published before June 2019 were analyzed. The following laboratory methods were compared: number and size of platelets, bleeding time, clot retraction time, platelet function assay 100 & 200, Rapid platelet function assay, flow cytometry, light transmission aggregometry, multiple electrode aggregometry, 96-well plate aggregometry, cone and plate(let) analyzer (Impact-R), and Plateletworks (single platelet counting system). This article provides the reader with a rapid comparison of the different systems used to study platelets activities.
Collapse
|
11
|
Harrison P, Bethel MA, Kennedy I, Dinsdale R, Coleman R, Holman RR. Comparison of nine platelet function tests used to determine responses to different aspirin dosages in people with type 2 diabetes. Platelets 2018; 30:521-529. [DOI: 10.1080/09537104.2018.1478402] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Paul Harrison
- Institute of Inflammation and Ageing, University of Birmingham Medical School, Birmingham, UK
| | | | - Irene Kennedy
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- NIHR Oxford Biomedical Research Centre, Churchill Hospital, Oxford, UK
| | - Robert Dinsdale
- Institute of Inflammation and Ageing, University of Birmingham Medical School, Birmingham, UK
| | - Ruth Coleman
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- NIHR Oxford Biomedical Research Centre, Churchill Hospital, Oxford, UK
| | - Rury R. Holman
- Diabetes Trials Unit, University of Oxford, Oxford, UK
- NIHR Oxford Biomedical Research Centre, Churchill Hospital, Oxford, UK
| |
Collapse
|
12
|
Bath PM, May J, Heptinstall S. Clinical utility of remote platelet function measurement using P-selectin: assessment of aspirin, clopidogrel, and prasugrel and bleeding disorders. Platelets 2018; 29:425-430. [DOI: 10.1080/09537104.2018.1445839] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Philip M Bath
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK
| | - Jane May
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK
| | - Stan Heptinstall
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK
| |
Collapse
|
13
|
Bordet JC, Negrier C, Dargaud Y, Quellec SL. Comparison of current platelet functional tests for the assessment of aspirin and clopidogrel response. Thromb Haemost 2017; 116:638-50. [DOI: 10.1160/th15-11-0870] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 06/29/2016] [Indexed: 12/18/2022]
Abstract
SummaryThe two most widely used antiplatelet drugs in the world are aspirin and clopidogrel. However, some patients on aspirin and/or clopidogrel therapy do not respond appropriately to either aspirin or clopidogrel. This phenomenon is usually called “aspirin/clopidogrel resistance”. Several platelet function tests have been used in various studies for the assessment of aspirin and clopidogrel resistance in healthy individuals and patients admitted in cardiology departments. An accurate assessment of platelet response to aspirin/clopidogrel could benefit patients by proposing tailored-antiplatelet therapy based on test results. However, there is a clear lack of standardisation of such techniques and their analytical variability may induce misinterpretation. After a quick report of the mechanisms responsible for aspirin/clopidogrel resistance, we describe the pre-analytical aspects and the analytical performances of current platelet function tests (Light-transmission aggregometry, whole-blood aggregometry, VerifyNow®, Platelet Function Analyzer®, thromboelastography, VASP assay) that are used for the assessment of aspirin/clopidogrel resistance in clinical studies. Considering the different variables that have to be taken into account with each of the platelet function tests, a particular attention should be paid when interpreting results.
Collapse
|
14
|
Platelet Aggregometry Testing: Molecular Mechanisms, Techniques and Clinical Implications. Int J Mol Sci 2017; 18:ijms18081803. [PMID: 28820484 PMCID: PMC5578190 DOI: 10.3390/ijms18081803] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/08/2017] [Accepted: 08/10/2017] [Indexed: 12/18/2022] Open
Abstract
Platelets play a fundamental role in normal hemostasis, while their inherited or acquired dysfunctions are involved in a variety of bleeding disorders or thrombotic events. Several laboratory methodologies or point-of-care testing methods are currently available for clinical and experimental settings. These methods describe different aspects of platelet function based on platelet aggregation, platelet adhesion, the viscoelastic properties during clot formation, the evaluation of thromboxane metabolism or certain flow cytometry techniques. Platelet aggregometry is applied in different clinical settings as monitoring response to antiplatelet therapies, the assessment of perioperative bleeding risk, the diagnosis of inherited bleeding disorders or in transfusion medicine. The rationale for platelet function-driven antiplatelet therapy was based on the result of several studies on patients undergoing percutaneous coronary intervention (PCI), where an association between high platelet reactivity despite P2Y12 inhibition and ischemic events as stent thrombosis or cardiovascular death was found. However, recent large scale randomized, controlled trials have consistently failed to demonstrate a benefit of personalised antiplatelet therapy based on platelet function testing.
Collapse
|
15
|
Bath PM, May J, Flaherty K, Woodhouse LJ, Dovlatova N, Fox SC, England TJ, Krishnan K, Robinson TG, Sprigg N, Heptinstall S, Investigators TARDIS. Remote Assessment of Platelet Function in Patients with Acute Stroke or Transient Ischaemic Attack. Stroke Res Treat 2017; 2017:7365684. [PMID: 28630782 PMCID: PMC5463170 DOI: 10.1155/2017/7365684] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 03/03/2017] [Accepted: 03/30/2017] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND The TARDIS trial assessed the safety and efficacy of intensive versus guideline antiplatelet agents given for one month in patients with acute stroke or TIA. The aim of this substudy was to assess the effect of antiplatelet agents taken at baseline on platelet function reactivity and activation. METHODS Platelet function, assessed by remotely measured surface expression of P-selectin, was assessed in patients at their time of randomisation. Data are median fluorescence values. RESULTS The aspirin P-selectin test demonstrated that platelet expression was lower in 494 patients taking aspirin than in 162 patients not: mean 210 (SD 188) versus 570 (435), difference 360.3 (95% CI 312.2-408.4) (2p < 0.001). Aspirin did not suppress P-selectin levels below 500 units in 23 (4.7%) patients. The clopidogrel test showed that platelet reactivity was lower in 97 patients taking clopidogrel than in 585 patients not: 655 (296) versus 969 (315), difference 314.5 (95% CI 247.3-381.7) (2p < 0.001). Clopidogrel did not suppress P-selectin level below 860 units in 24 (24.7%) patients. CONCLUSIONS Aspirin and clopidogrel suppress stimulated platelet P-selectin, although one-quarter of patients on clopidogrel have high on-treatment platelet reactivity. Platelet function testing may be performed remotely in the context of a large multicentre trial. Trial registration ISRCTN47823388.
Collapse
Affiliation(s)
- Philip M. Bath
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, City Hospital Campus, Nottingham NG5 1PB, UK
- Stroke, Nottingham University Hospitals NHS Trust, City Hospital Campus, Nottingham NG5 1PB, UK
| | - Jane May
- Platelet Solutions Ltd., Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
- Platelet Research Group/Stroke, Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
| | - Katie Flaherty
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, City Hospital Campus, Nottingham NG5 1PB, UK
| | - Lisa J. Woodhouse
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, City Hospital Campus, Nottingham NG5 1PB, UK
| | - Natalia Dovlatova
- Platelet Solutions Ltd., Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
- Platelet Research Group/Stroke, Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
| | - Sue C. Fox
- Platelet Solutions Ltd., Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
- Platelet Research Group/Stroke, Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
| | - Timothy J. England
- Vascular Medicine, Division of Medical Sciences and GEM, School of Medicine, University of Nottingham, Nottingham, UK
| | - Kailash Krishnan
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, City Hospital Campus, Nottingham NG5 1PB, UK
- Stroke, Nottingham University Hospitals NHS Trust, City Hospital Campus, Nottingham NG5 1PB, UK
| | - Thompson G. Robinson
- Department of Cardiovascular Sciences, University of Leicester, Glenfield Hospital, Leicester LE3 9QP, UK
| | - Nikola Sprigg
- Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, City Hospital Campus, Nottingham NG5 1PB, UK
- Stroke, Nottingham University Hospitals NHS Trust, City Hospital Campus, Nottingham NG5 1PB, UK
| | - Stan Heptinstall
- Platelet Solutions Ltd., Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
- Platelet Research Group/Stroke, Division of Clinical Neuroscience, University of Nottingham, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
| | | |
Collapse
|
16
|
den Toom ML, van Leeuwen MW, Szatmári V, Teske E. Effects of clopidogrel therapy on whole blood platelet aggregation, the Plateletworks® assay and coagulation parameters in cats with asymptomatic hypertrophic cardiomyopathy: a pilot study. Vet Q 2016; 37:8-15. [PMID: 27786603 DOI: 10.1080/01652176.2016.1244618] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
BACKGROUND Although scientific evidence is limited, clopidogrel is frequently used as prophylaxis for arterial thromboembolism in cats with hypertrophic cardiomyopathy (HCM). OBJECTIVES Evaluating effects of clopidogrel therapy in asymptomatic cats with HCM on (1) conventional whole blood aggregation (WBA), (2) alternative platelet aggregation assessed with tubes of the Plateletworks® assay and (3) standard coagulation parameters. ANIMALS AND METHODS Prospective, randomized, double-blind, placebo-controlled pilot study. Fourteen asymptomatic HCM cats were randomly allocated to receive placebo (n = 5) or clopidogrel (18.75 mg/cat q24h, n = 9) as part of a larger study. Aggregation responses (to 20 µM adenosine diphosphate (ADP) and 10 µg/ml collagen) in WBA and the Plateletworks® assay and standard coagulation parameters were evaluated at baseline and after seven days of therapy. RESULTS Clopidogrel therapy significantly reduced aggregation responses to ADP and collagen in the Plateletworks® agonists tubes (ADP and collagen: P < 0.001), but did not significantly reduce aggregation responses to ADP and collagen in the WBA technique (ADP: P = 0.07, collagen: P = 0.30). Clopidogrel therapy did not show a significant effect on prothrombin time, activated partial thromboplastin time, antithrombin, D-dimers and fibrinogen concentrations. CONCLUSION AND CLINICAL IMPORTANCE Clopidogrel therapy at a dose of 18.75 mg/cat q24h for seven days causes a significant decrease in in vitro platelet aggregation evaluated with the Plateletworks® assay, without affecting standard coagulation parameters in cats with asymptomatic HCM.
Collapse
Affiliation(s)
- M L den Toom
- a Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| | - M W van Leeuwen
- a Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| | - V Szatmári
- a Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| | - E Teske
- a Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| |
Collapse
|
17
|
Platelet function testing after acute myocardial infarction: The correlation among various assays is insufficient. COR ET VASA 2016. [DOI: 10.1016/j.crvasa.2015.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
18
|
Lim ST, Coughlan CA, Murphy SJX, Fernandez-Cadenas I, Montaner J, Thijs V, Marquardt L, McCabe DJH. Platelet function testing in transient ischaemic attack and ischaemic stroke: A comprehensive systematic review of the literature. Platelets 2015; 26:402-12. [DOI: 10.3109/09537104.2015.1049139] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
19
|
Corredor C, Wasowicz M, Karkouti K, Sharma V. The role of point-of-care platelet function testing in predicting postoperative bleeding following cardiac surgery: a systematic review and meta-analysis. Anaesthesia 2015; 70:715-31. [PMID: 25916344 DOI: 10.1111/anae.13083] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/03/2015] [Indexed: 12/23/2022]
Abstract
This systematic review and meta-analysis appraises the utility of point-of-care platelet function tests for predicting blood loss and transfusion requirements in cardiac surgical patients, and analyses whether their use within a transfusion management algorithm is associated with improved patient outcomes. We included 30 observational studies incorporating 3044 patients in the qualitative assessment, and nine randomised controlled trials including 1057 patients in the meta-analysis. Platelet function tests demonstrated significant variability in their ability to predict blood loss and transfusion requirements. Their use within a blood transfusion algorithm demonstrated a reduction in blood loss at longest follow-up (mean difference -102.9 ml (95% CI -149.9 to -56.1 ml), p < 0.001), and transfusion of packed red cells (RR 0.86 (95% CI 0.78-0.94), p = 0.001) and fresh frozen plasma (RR 0.42 (95% CI 0.30-0.59), p < 0.001). Viscoelastic methods used in combination with other platelet function tests achieved greater reduction in blood loss (mean difference -111.8 ml (95% CI -174.9 to -49.1 ml), p = 0.0005) compared with their use alone (mean difference -90.6 ml (95% CI 166.1-15.0 ml), p = 0.02). We conclude that incorporation of point-of-care platelet function tests into transfusion management algorithms is associated with a reduction in blood loss and transfusion requirements in cardiac surgery patients.
Collapse
Affiliation(s)
- C Corredor
- Department of Anaesthesia, St. George's Hospital, London, UK
| | - M Wasowicz
- Department of Anesthesia and Pain Management, Toronto General Hospital, Toronto, Ontario, Canada
| | - K Karkouti
- Department of Anesthesia and Pain Management, Toronto General Hospital, Toronto, Ontario, Canada
| | - V Sharma
- Department of Anaesthesia, St. George's Hospital, London, UK
| |
Collapse
|
20
|
Laboratory Aspirin Resistance Reversibility in Diabetic Patients: a Pilot Study Using Different Pharmaceutical Formulations. Cardiovasc Drugs Ther 2014; 28:323-9. [DOI: 10.1007/s10557-014-6536-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
21
|
Zhen XE, Zong M, Gao SN, Cao YG, Jiang L, Chen SX, Wang K, Sun SQ, Peng HS, Bai YH, Li S. Preparation and characterization of a novel aspirin derivative with anti-thrombotic and gastric mucosal protection properties. PLoS One 2014; 9:e98513. [PMID: 24892779 PMCID: PMC4043976 DOI: 10.1371/journal.pone.0098513] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Accepted: 05/01/2014] [Indexed: 12/20/2022] Open
Abstract
The use of acetylsalicylic acid (ASP) is limited by its adverse effects, especially the effect on the gastric mucosa. To address this problem, we synthesized a derivative form of ASP, prepared by modification of ASP with nano-hydroxyapatite (a kind of inorganic particle containing Ca(2+)). The derivative was named Ca-ASP. Structural study showed that Ca-ASP was a kind of carboxylate containing intramolecular hydrogen bonds. Rats given a high dose of Ca-ASP (5 mmol per kg body weight) showed similar anti-thrombotic activity as those given the same dose of ASP, but had much lower gastric mucosal damage than ASP (UI: 2 versus UI: 12.5). These rats also showed reduced expression of COX-2, but their COX-1 expression was similar to that of control rats, but significantly higher than that of ASP-administered rats. Furthermore, the level of prostaglandin E2 (PGE2) was up-regulated in Ca-ASP-administered rats compared to ASP-administered rats. Taken together, the results showed that Ca-ASP possessed similar antithrombotic activity as ASP but without the side effect associated with ASP, and the underlying mechanism may center on inhibiting COX-2 without inhibiting COX-1, and thus favouring the production of PGE2, the prostaglandin that plays a vital role in the suppression of platelet aggregation and thrombosis, as well as in the repair of gastric damage.
Collapse
Affiliation(s)
- Xi-E Zhen
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Ming Zong
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Sai-Nan Gao
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Yong-Gang Cao
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Lei Jiang
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Shu-Xin Chen
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Kuan Wang
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Shi-Qin Sun
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Hai-Sheng Peng
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Yu-Hua Bai
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
| | - Sen Li
- Department of Pharmaceutics, Daqing Branch, Harbin Medical University, Daqing, China
- * E-mail:
| |
Collapse
|
22
|
Renda G, Zurro M, Malatesta G, Ruggieri B, De Caterina R. Inconsistency of different methods for assessing ex vivo platelet function: relevance for the detection of aspirin resistance. Haematologica 2014; 95:2095-101. [PMID: 21123440 DOI: 10.3324/haematol.2010.027102] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Assays to evaluate platelet function are often interchangeably used to assess "resistance" to aspirin. We compared different platelet function assays in patients treated or untreated with aspirin. DESIGN AND METHODS Platelet function was evaluated in 162 subjects, 85 of whom were not being treated with any antiplatelet drug and 77 of whom were receiving chronic therapy with low-dose aspirin. Platelet Function Analyzer collagen/ADP- and collagen/epinephrine closure times, as well as light transmittance aggregometry in response to ADP, collagen and arachidonic acid (this last in 47 aspirin-treated patients) were determined. In 43 aspirin-treated patients, serum thromboxane B(2) levels were also measured. RESULTS In untreated patients, collagen/ADP- and collagen/epinephrine-closure times were correlated with each other (r=0.5, P=0.0001), but did not correlate with ADP- or collagen-induced aggregation. In patients treated with aspirin, collagen/ADP-closure time values were not different from those in untreated patients, while the collagen/epinephrine-closure time was prolonged. ADP-induced aggregation was unaffected by aspirin, while collagen-induced aggregation was reduced. Arachidonic acid-induced aggregation was almost completely suppressed (% maximum light transmittance aggregometry =5 ± 13%). There was, however, no correlation between the various platelet function tests. Serum thromboxane B(2), an index of platelet cyclooxygenase-1 activity, was almost completely suppressed (down to 8 ± 17 ng/mL) in treated patients, and was not correlated with arachidonic acid-, ADP- and collagen-induced aggregation or with collagen/ADP-closure time, but was inversely correlated with collagen/epinephrine-closure time. CONCLUSIONS There is a high heterogeneity of results of tests evaluating inhibition of platelet function by aspirin, and the results of functional tests do not match biochemical measurement of cyclooxygenase-1 activity. Extreme caution should, therefore, be used in defining "resistance" to aspirin on the basis of the results of these tests.
Collapse
Affiliation(s)
- Giulia Renda
- The Institute of Cardiology and Center of Excellence on Aging at G. d'Annunzio University, Chieti, Italy
| | | | | | | | | |
Collapse
|
23
|
Timur AA, Murugesan G, Zhang L, Barnard J, Bhatt DL, Kottke-Marchant K. Multi-parameter assessment of platelet inhibition and its stability during aspirin and clopidogrel therapy. Thromb Res 2014; 134:96-104. [PMID: 24852729 DOI: 10.1016/j.thromres.2014.04.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/04/2014] [Accepted: 04/15/2014] [Indexed: 10/25/2022]
Abstract
INTRODUCTION Poor response to antiplatelet drugs is associated with adverse outcomes. We assessed platelet inhibition and its stability and tested correlation and agreement between platelet function assays. METHODS Peripheral blood from 58 patients on both aspirin and clopidogrel who underwent percutaneous coronary intervention (PCI) was collected at hospital discharge (visit-1) and at 30-90 days (visit-2). Platelet function was measured using light transmission aggregometry (LTA-AA and LTA-ADP), VerifyNow® (Aspirin; ARU and P2Y12; PRU), ex vivo TxB2, urinary 11dhTxB2, and VASP (PRI) assays. Data were analyzed as continuous, quartiles and binary. Patients were defined as aspirin poor responder (PR) with ARU ≥ 550, LTA-AA maximum ≥ 20%, TxB2 ≥ 1 ng/mL or 11dhTxB2 ≥ 1,500 pg/mg of creatinine and as clopidogrel PR with PRU ≥ 240, PRU ≥ 208, LTA-ADP maximum ≥ 40%, PRI ≥ 50%, or PRI ≥66%. RESULTS Aspirin PR was 3-33% and clopidogrel PR was 10-35% in visit-1. LTA-AA, 11dhTxB2, and all clopidogrel-response measures showed correlation and agreement between visit-1 and visit-2. The highest agreement between two visits was revealed by PRU ≥ 240 and PRI ≥ 66% (PRU-κ=0.7, 95% CI=0.47, 0.93; PRI-κ=0.69, 95% CI=0.42, 0.95, p-values<0.001). Comparison of platelet function assays in a single visit (visit-1) revealed a poor correlation between LTA-AA and 11dhTxB2 assays and no agreement among aspirin-response assays. The highest correlation and agreement were obtained between VerifyNow® P2Y12 and VASP assays (rho=0.7, p-value<0.001 and PRU ≥ 208-PRI-κ=0.41-0.42, 95% CI=0.13, 0.69, p-values<0.001). CONCLUSIONS Platelet inhibition is stable during aspirin and clopidogrel treatment. Clopidogrel-response assays correlate and agree with each other better than aspirin-response assays.
Collapse
Affiliation(s)
- A Anil Timur
- Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Gurunathan Murugesan
- Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Li Zhang
- Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - John Barnard
- Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Deepak L Bhatt
- Brigham and Women's Hospital Heart & Vascular Center, and Harvard Medical School, Boston, MA, USA
| | - Kandice Kottke-Marchant
- Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, OH, USA.
| |
Collapse
|
24
|
Kinsella JA, Tobin WO, Cox D, Coughlan T, Collins R, O’Neill D, Murphy RP, McCabe DJ. Prevalence of Ex Vivo High On-treatment Platelet Reactivity on Antiplatelet Therapy after Transient Ischemic Attack or Ischemic Stroke on the PFA-100® and VerifyNow®. J Stroke Cerebrovasc Dis 2013; 22:e84-92. [DOI: 10.1016/j.jstrokecerebrovasdis.2012.07.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 07/12/2012] [Accepted: 07/13/2012] [Indexed: 11/29/2022] Open
|
25
|
Schwartz KA. Aspirin resistance: a clinical review focused on the most common cause, noncompliance. Neurohospitalist 2013; 1:94-103. [PMID: 23983843 DOI: 10.1177/1941875210395776] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Aspirin is an inexpensive, readily available medication that reduces the risk of subsequent vascular disease by about 25% in patients with known occlusive vascular disease. Aspirin's beneficial effect is mediated via inhibition of arachidonic acid (AA) activation of platelets and is detected by demonstrating a decrease in platelet function and/or a decrease in prostaglandin metabolites. Patients who are assumed to be taking their aspirin, but who do not demonstrate an aspirin effect are labeled as, "aspirin resistant." This is an unfortunate designation as the vast majority of patients labeled as "aspirin resistant" are noncompliant. Noncompliance is demonstrated in multiple studies that use repeat testing for platelet inhibition in patients with an initial inadequate response to aspirin. When the test is repeated under condition where ingestion of the test aspirin is assured, the patients' platelets are inhibited. Instead of using the term "aspirin resistance," this review will use "inadequate response to aspirin." Patients with an inadequate aspirin response have an increased likelihood for subsequent vascular events. Detection and treatment of an inadequate aspirin response would be facilitated by the development of a bedside assay that uses whole blood, is technically simple, inexpensive, sensitive, specific, reproducible, and provides an answer in a few minutes. Future research in patients with an inadequate response to aspirin should focus on mechanisms to improve compliance, which should decrease their risk of future vascular events.
Collapse
Affiliation(s)
- Kenneth A Schwartz
- Department of Medicine, Division of Hematology/Oncology, Michigan State University, East Lansing, Michigan, USA
| |
Collapse
|
26
|
Tobin WO, Kinsella JA, Coughlan T, Collins DR, O'Neill D, Murphy RP, Egan B, Tierney S, Feeley TM, McCabe DJH. High on-treatment platelet reactivity on commonly prescribed antiplatelet agents following transient ischaemic attack or ischaemic stroke: results from the Trinity Antiplatelet Responsiveness (TRAP) study. Eur J Neurol 2012; 20:344-52. [DOI: 10.1111/j.1468-1331.2012.03861.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Accepted: 07/25/2012] [Indexed: 11/26/2022]
Affiliation(s)
- W. O. Tobin
- Department of Neurology; Adelaide and Meath Hospital; Dublin, incorporating the National Children's Hospital; Trinity College Dublin; Dublin; Ireland
| | - J. A. Kinsella
- Department of Neurology; Adelaide and Meath Hospital; Dublin, incorporating the National Children's Hospital; Trinity College Dublin; Dublin; Ireland
| | | | | | | | | | - B. Egan
- Department of Vascular Surgery; Adelaide and Meath Hospital; Dublin, incorporating the National Children's Hospital; Trinity College Dublin; Dublin; Ireland
| | - S. Tierney
- Department of Vascular Surgery; Adelaide and Meath Hospital; Dublin, incorporating the National Children's Hospital; Trinity College Dublin; Dublin; Ireland
| | - T. M. Feeley
- Department of Vascular Surgery; Adelaide and Meath Hospital; Dublin, incorporating the National Children's Hospital; Trinity College Dublin; Dublin; Ireland
| | | |
Collapse
|
27
|
Comparison of the protective effect of dipyridamole and acetylsalicylic acid on long-term histologic damage in a rat model of testicular ischemia-reperfusion injury. J Pediatr Surg 2012; 47:1716-23. [PMID: 22974612 DOI: 10.1016/j.jpedsurg.2012.01.078] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/05/2012] [Accepted: 01/31/2012] [Indexed: 11/23/2022]
Abstract
PURPOSE Ischemia reperfusion injury arising from testicular torsion results in a loss of spermatogenesis and a significant increase in germ cell apoptosis. We investigated the effects of dipyridamole and acetylsalicylic acid (ASA), 2 well-known platelet inhibitors, on testicular ischemia reperfusion injury. METHODS Thirty adult male Sprague-Dawley rats were randomly divided into 5 groups (n = 6 for each group): control, sham-operated, torsion/detorsion (T/D), T/D + dipyridamole, and T/D + ASA. Testicular ischemia was achieved by rotating the left testis 720° clockwise for 2 hours. Thirty minutes before torsion, 10 mg/kg dipyridamole was injected transperitoneally in the T/D + dipyridamole group, and 100 mg/kg ASA was injected transperitoneally in the T/D + ASA group. Sixty days after the initial surgical procedure, ipsilateral orchiectomies were performed for histopathologic examination to determine Johnsen's mean testicular biopsy score (MTBS), mean seminiferous tubular diameter (MSTD), and apoptotic index (AI) in all groups. RESULTS Unilateral testicular torsion-detorsion led to a significant decrease in Johnsen's MTBS and MSTD values in the ipsilateral testis and a significant increase in AI values of the T/D group. There were no significant differences between the T/D + dipyridamole and control groups in terms of MSTD and MTBS values. Although an amount of improvement exits in T/D + ASA group, there were significant differences between the T/D + ASA and control group MSTD and MTBS values. There was no significant difference between the T/D + dipyridamole and control groups in terms of AI values (P > .05), but the differences between the T/D + ASA and control groups were significant despite a slight decline in AI values of the T/D + ASA group. CONCLUSIONS Our findings show that the use of dipyridamole before testicular reperfusion has a potentially protective effect against long-term injury in testicular ischemia reperfusion injury.
Collapse
|
28
|
Sadilkova L, Paluch Z, Mottlova J, Bednar F, Alusik S. The effect of selected pre-analytical phase variables on plasma thromboxane A₂ measurements in humans. Int J Lab Hematol 2012; 35:92-100. [PMID: 22908995 DOI: 10.1111/j.1751-553x.2012.01458.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 05/08/2012] [Indexed: 11/30/2022]
Abstract
AIMS Platelet function testing is often affected by the existence of different pre-analytical variables that can cause platelet activation. The aim of this study was to assess the effect of such variables that are present when samples are taken (different anticoagulants, incubation temperature, and storage conditions) to select those which enable to reach optimal range of measured plasma concentrations of the two stable thromboxane A₂ metabolites, that is, thromboxane B₂ (TxB₂) and 11-dehydrothromboxane B₂ (11-dTxB₂). MATERIALS AND METHODS For the purpose of this study, whole blood samples obtained from 20 volunteers were screened for TxB₂ and 11-dTxB₂ concentrations using commercial EIA kits (Cayman Chemicals™; Neogen™) in relation to the effect of different anticoagulants, using different incubation temperatures and storage conditions. RESULTS Trisodium citrate has been shown not to be affecting the TxB₂ and 11-dTxB₂ concentrations compared with the values measured in the serum. Incubation of the samples for 1 h at 37 °C and freezing at -20 °C or -80 °C give the most suitable concentration range of both thromboxanes in the used EIA measurement. CONCLUSION This study describes the setup of such pre-analytical phase conditions that enable the screening of platelet function in terms of the plasma concentrations of TxB₂ and 11-dTxB₂ in selected EIA measurement.
Collapse
Affiliation(s)
- L Sadilkova
- Division of Clinical Pharmacology of the Department of Medicine I, Thomayer Hospital, Prague, Czech Republic.
| | | | | | | | | |
Collapse
|
29
|
Assessment of Platelet Function in Patients on Antiplatelet Therapy Undergoing Cardiac Surgery: A Review. Heart Lung Circ 2012; 21:455-62. [DOI: 10.1016/j.hlc.2012.03.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 03/12/2012] [Accepted: 03/14/2012] [Indexed: 02/07/2023]
|
30
|
Abstract
Antiplatelet treatment is a mainstay in acute and long-term secondary stroke prevention. Aspirin is still most widely used worldwide, however, there is increasing evidence from small randomised trials that dual antiplatelet therapy combining aspirin with dipyridamole or clopidogrel might be more effective in the acute and early chronic post-ischemic phase (i.e. first 90 days). Both clopidogrel and the combination of aspirin and extended-release dipyridamole are recommended by current guidelines in long-term secondary stroke prevention in patients who are at high risk for a recurrent ischemic stroke, since they are more effective compared with aspirin monotherapy. Antiplatelet agents are the therapy of choice in patients with ischemic stroke due to intracranial stenosis and patent foramen ovale. In contrast, oral anticoagulation is clearly superior to single or double antiplatelet therapy in patients with cardioembolic stroke, mainly caused by atrial fibrillation.Concerning newer antiplatelet agents, only cilostazol appears to be a promising therapeutic option in patients with ischemic stroke in the near future, but so far, only studies in Asian stroke patients have been performed.
Collapse
Affiliation(s)
- Ralph Weber
- Department of Neurology and Stroke Center, University Duisburg-Essen, Hufelandstr. 55, 45122, Essen, Germany
| | | | | |
Collapse
|
31
|
Sevcikova H, Vojacek J, Bis J, Sevcik R, Maly J, Pecka M, Fatorova I. Good short-term but not long-term reproducibility of the antiplatelet efficacy laboratory assessment. Clin Appl Thromb Hemost 2011; 18:174-80. [PMID: 21949037 DOI: 10.1177/1076029611418961] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND The antiplatelet effect of acetylsalicylic acid (ASA) varies among individual patients. We assessed the short-term reproducibility (STR) and long-term reproducibility (LTR) of light transmission aggregometry (LTA). METHODS Residual platelet reactivity was measured twice using LTA in a group of 207 consecutive patients (56 females, mean age 67 ± 9 years) on ASA therapy in 10 ± 6 months interval. The STR was assessed in 15 patients (6 females, mean age 61 ± 7 years) with 10 measurements on 2 consecutive days. RESULTS There was no correlation between both measurements in the long-term part of the study, and also Bland-Altman plot showed a diverging pattern. However, LTA STR was good with a correlation coefficient of .800 (P < .05) confirmed by Bland-Altman plot. CONCLUSIONS Although short-term intraindividual reproducibility of LTA assessment of platelet reactivity is very good, in the long-term perspective the antiplatelet ASA effectivity may be influenced by additional variables and repeated measurements are warranted.
Collapse
Affiliation(s)
- Hana Sevcikova
- Department Medicine I, Charles University Prague, School of Medicine, Czech Republic
| | | | | | | | | | | | | |
Collapse
|
32
|
Madsen EH, Gehr NR, Johannesen NL, Schmidt EB, Kristensen SR. Platelet response to aspirin and clopidogrel in patients with peripheral atherosclerosis. Platelets 2011; 22:537-46. [PMID: 21591982 DOI: 10.3109/09537104.2011.577254] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Aspirin and clopidogrel are important drugs in the secondary prevention of ischemic events. A considerable individual variation in platelet response to these drugs has, however, been reported, and high residual platelet reactivity despite treatment may be an independent risk factor for ischemic events. Most studies have been undertaken in patients with coronary heart disease, but patients with peripheral artery disease (PAD) may exhibit greater residual platelet reactivity, possibly because of platelet activation by a larger area of diseased endothelium. It is yet unsettled which method that best measures platelet reactivity and an eventual lack of response to aspirin. Several instruments are promoted to measure platelet response and low-response to platelet inhibitors, but it is questionable if they measure this in comparable ways. We studied the comparability of three tests of platelet reactivity for the assessment of low-response to aspirin and clopidogrel in patients with PAD. In 263 patients, platelet function was assessed twice, 3 months apart, by the Platelet Function Analyzer-100 (PFA), light transmission aggregometry (LTA), and whole blood impedance aggregometry (IA). In a subgroup of 43 patients, we studied the effect of a single dose of 600 mg clopidogrel on platelet function. Low-response to aspirin assessed by analyses targeting cyclooxygenase-1 activity (LTA, IA) was rare (≤ 8.1%). With the PFA, we found 17% with low response at both visits, and 60% who were consistently responsive, whereas 23% were categorized differently at the two visits. Low response to clopidogrel, occurred in 0-23%, depending on the method and the criteria used. A low-response to aspirin, defined by lack of COX-1 inhibition, is a rare phenomenon whereas high residual platelet reactivity as determined by PFA may be a rather frequent finding but is not consistent over time in all patients. A low-response to clopidogrel depends very much on the method and definition used.
Collapse
Affiliation(s)
- Esben Hjorth Madsen
- Department of Internal Medicine, Viborg Hospital , Heibergs Allé 4, 8800 Viborg, Denmark.
| | | | | | | | | |
Collapse
|
33
|
Halawani SHM, Williams DJP, Adefurin A, Webster J, Greaves M, Ford I. Aspirin failure in patients presenting with acute cerebrovascular ischaemia. Thromb Haemost 2011; 106:240-7. [PMID: 21544317 DOI: 10.1160/th11-01-0045] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Accepted: 04/08/2011] [Indexed: 11/05/2022]
Abstract
Aspirin is the most commonly used antiplatelet drug for prevention of ischaemic stroke. In order to determine the prevalence and nature of aspirin failure, we studied 51 adults admitted with suspected ischaemic stroke and already prescribed daily aspirin. Within 48 hours (h) of onset, blood and urine samples were collected to assess platelet aggregation, activation and aspirin response by a range of methods. All tests were then repeated on a second sample taken 24 h after witnessed administration of 75 mg or 150 mg aspirin. At entry to the study, incomplete response to aspirin, measured by arachidonic acid (AA)-stimulated platelet aggregation, was found in 43% of patients. Following in-hospital aspirin administration, there was a significant decrease in AA-aggregation (p=0.001) suggesting poor adherence to therapy prior to admission. However, residual aggregation (10-15%) persisted in 11 subjects - suggesting alternative causes. In incomplete responders on admission, platelet aggregation with adenosine diphosphate (ADP) was significantly higher compared with responders (p<0.05) but there were no significant differences in collagen aggregation, platelet fibrinogen binding or P-selectin expression, plasma von Willebrand factor, fibrinogen, high-sensitivity C-reactive protein, or the urinary metabolite, 11-dehydro-TxB2. Incomplete platelet inhibition is common around the time of acute cerebrovascular ischaemic events in patients prescribed aspirin. Up to 50% of these observations appear due to incomplete adherence to aspirin therapy. Intervention studies are required to determine the clinical relevance of measured platelet response to aspirin in terms of outcome, and the effectiveness of improved pharmacotherapy for stroke prevention.
Collapse
Affiliation(s)
- Saeed H M Halawani
- School of Medicine and Dentistry, University of Aberdeen, and Acute Stroke Unit, Aberdeen Royal Infirmary, Aberdeen, Scotland, UK
| | | | | | | | | | | |
Collapse
|
34
|
Fong J, Cheng-Ching E, Hussain MS, Katzan I, Gupta R. Predictors of Biochemical Aspirin and Clopidogrel Resistance in Patients With Ischemic Stroke. J Stroke Cerebrovasc Dis 2011; 20:227-30. [DOI: 10.1016/j.jstrokecerebrovasdis.2009.12.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2009] [Revised: 11/30/2009] [Accepted: 12/01/2009] [Indexed: 11/16/2022] Open
|
35
|
FitzGerald R, Pirmohamed M. Aspirin resistance: Effect of clinical, biochemical and genetic factors. Pharmacol Ther 2011; 130:213-25. [DOI: 10.1016/j.pharmthera.2011.01.011] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Accepted: 01/18/2011] [Indexed: 01/08/2023]
|
36
|
Aspirin resistance in patients with acute ischemic stroke. J Neurol 2011; 258:1979-86. [DOI: 10.1007/s00415-011-6052-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 03/19/2011] [Accepted: 04/08/2011] [Indexed: 10/18/2022]
|
37
|
Weber R, Diener HC. Controversies and future perspectives of antiplatelet therapy in secondary stroke prevention. J Cell Mol Med 2011; 14:2371-80. [PMID: 20738445 PMCID: PMC3823155 DOI: 10.1111/j.1582-4934.2010.01162.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Antiplatelet agents are a cornerstone in the treatment of acute arterial thrombotic events and in the prevention of thrombus formation. However, existing antiplatelet agents (mainly aspirin, the combination of aspirin and dipyridamole and clopidogrel) reduce the risk of vascular events only by about one quarter compared with placebo. As a consequence, more efficacious antiplatelet therapies with a reduced bleeding risk are needed. We give an overview of several new antiplatelet agents that are currently investigated in secondary stroke prevention: adenosine 5'-diphosphonate receptor antagonists, cilostazol, sarpogrelate, terutroban and SCH 530348. There are unique features in secondary stroke prevention that have to be taken into account: ischaemic stroke is a heterogeneous disease caused by multiple aetiologies and the blood-brain barrier is disturbed after stroke which may result in a higher intracerebral bleeding risk. Several small randomized trials indicated that the combination of aspirin and clopidogrel might be superior to antiplatelet monotherapy in the acute and early post-ischaemic phase. There is an ongoing debate about antiplatelet resistance. Decreasing response to aspirin is correlated independently with an increased risk of cardiovascular events. However, there is still no evidence from randomized trials linking aspirin resistance and recurrent ischaemic events. Similarly, randomized trials have not demonstrated a clinical significantly decreased antiplatelet effect by the concomitant use of clopidogrel and proton pump inhibitors. Nevertheless, a routine use of this drug combination is not recommended.
Collapse
Affiliation(s)
- Ralph Weber
- Department of Neurology and Stroke Center, University Duisburg-Essen, Essen, Germany
| | | |
Collapse
|
38
|
Crescente M, Mezzasoma AM, Del Pinto M, Palmerini F, Di Castelnuovo A, Cerletti C, De Gaetano G, Gresele P. Incomplete inhibition of platelet function as assessed by the platelet function analyzer (PFA-100) identifies a subset of cardiovascular patients with high residual platelet response while on aspirin. Platelets 2011; 22:179-87. [PMID: 21284493 DOI: 10.3109/09537104.2010.543710] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Sixty-six patients with a history of ischemic events (myocardial infarction, unstable angina, or stroke) on chronic aspirin therapy were studied by different platelet function tests: 37 patients had suffered a recurrent event while on aspirin and 29 were without recurrences. Based on results from light transmission aggregometry (LTA) induced by arachidonic acid (AA) and serum TxB(2) both COX-1-dependent methods, only one patient could be identified as aspirin "resistant". However, when methods only partially-dependent on platelet COX-1 activity were considered, the prevalence of aspirin non-responders ranged, according to the different tests, from 0 to 52%. No difference was observed between patients with recurrences and those without. Among patients with recurrent events, those with an incomplete inhibition of platelet function, as assessed by the PFA-100, had significantly higher residual serum TxB(2) (2.4 ± 2.4 ng/mL vs 0.4 ± 0.1 ng/mL, p = 0.03), residual LTA-AA (9.2 ± 10.6% vs 2.0 ± 1.6%, p = 0.008), LTA-Coll (49.3 ± 14.6% vs 10.2 ± 8.3%, p = 0.007) and LTA-ADP (50.9 ± 16.2% vs 34.3 ± 11.0%, p = 0.04). In conclusion, laboratory tests solely exploring the AA-mediated pathway of platelet function, while being the most appropriate to detect the effect of aspirin on its pharmacologic target (platelet COX-1), may fail to reveal the functional interactions between minimal residual TxA(2) and additional stimuli or primers potentially leading to aspirin-insensitive platelet aggregation. High residual platelet response in platelet function tests only partially dependent on COX-1 may reveal a condition of persistent platelet reactivity in a subset of aspirin-treated patients characterizing them as a subgroup at higher vascular risk.
Collapse
Affiliation(s)
- M Crescente
- Department of Internal Medicine, University of Perugia, Italy
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Saunders J, Nambi V, Kimball KT, Virani SS, Morrisett JD, Lumsden AB, Ballantyne CM, Dong JF. Variability and persistence of aspirin response in lower extremity peripheral arterial disease patients. J Vasc Surg 2011; 53:668-75. [PMID: 21227624 DOI: 10.1016/j.jvs.2010.08.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 08/10/2010] [Accepted: 08/12/2010] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To determine the prevalence of poor response to aspirin (ASA) therapy over 12-month follow-up in patients with lower extremity peripheral arterial disease (PAD), and to compare the classification agreement among different ASA response assays. METHODS Patients with PAD on ASA therapy at baseline were included from the ongoing Effect of Lipid Modification on Peripheral Arterial Disease after Endovascular Intervention Trial (ELIMIT), which is a randomized trial testing whether combination treatment with ezetimibe, niacin, and a statin will halt/regress atherosclerosis compared with statin monotherapy. Patients who had baseline platelet testing and repeat testing at 6-month or 12-month follow-up were included. ASA responsiveness was tested using three different assays: Optical aggregation with 0.5 mg/mL of arachidonic acid (AA), optical aggregation with 10 μM of adenosine diphosphate (ADP), and platelet function analyzer-100 (PFA-100) testing with collagen/epinephrine (Epi) loaded cartridges. ASA response was defined as AA aggregation <30%, ADP aggregation <70%, or PFA-100 Epi >164 seconds. Patients who showed response to ASA at baseline were classified as Responders. Poor response to ASA was defined as AA aggregation ≥ 30%, ADP aggregation ≥ 70%, or PFA-100 Epi ≤ 164 seconds. Patients who showed poor response (PR) to an assay at baseline, but then were responsive at follow-up visits were classified as Initial PRs. Patients who showed poor response at baseline and all follow-up visits were classified as Persistent PRs. The classification agreement between assays was tested using the kappa statistic. RESULTS Of 102 patients randomized in ELIMIT, 80 patients satisfied inclusion criteria. There were no significant baseline demographic differences between Responders, Initial PRs, and Persistent PRs. The prevalence of persistent poor response varied by the assay used; 5% of subjects (4/80) were Persistent PRs by AA aggregation, compared with 27.5% (22/80) of subjects by ADP aggregation and 9.9% (7/71) of patients by PFA-100 Epi. Regarding the agreement of the assays, only AA aggregation and PFA-100 Epi agreed significantly (K = 0.3223; 95% confidence interval [CI] 0.15-0.493; P = .0001), and though statistically significant, the magnitude of this agreement is small. AA aggregation and ADP aggregation did not agree (K = 0.1161; 95% CI -0.004-0.236; P = .029), nor did ADP aggregation and PFA-100 Epi (K = 0.0044; 95% CI -0.151-0.160; P = .48). CONCLUSIONS Between 5% and 27.5% of PAD patients were Persistent PRs to ASA over 6- to 12-month follow-up using different platelet assays. Further, these commonly used platelet assays show weak agreement in determining poor response to aspirin.
Collapse
Affiliation(s)
- Justin Saunders
- Section of Atherosclerosis and Vascular Medicine, Department of Medicine, Baylor College of Medicine, Houston, Tex, USA.
| | | | | | | | | | | | | | | |
Collapse
|
40
|
Awidi A, Saleh A, Dweik M, Kailani B, Abu-Fara M, Nabulsi R, Bener A. Measurement of platelet reactivity of patients with cardiovascular disease on-treatment with acetyl salicylic acid: a prospective study. Heart Vessels 2010; 26:516-22. [DOI: 10.1007/s00380-010-0086-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Accepted: 09/03/2010] [Indexed: 10/18/2022]
|
41
|
Abstract
Although the utility of platelet function testing is still under debate, the necessity to inhibit platelets in patients suffering from cardiovascular and cerebrovascular disease is undoubted and well proven. The wide variety of available platelet function tests often using different methodologies, the apparent lack of standardization, and finally the emerging evidence on the clinical value of platelet function testing are resulting in a considerable uncertainty in the clinical practice, how to deal with the issue of platelet function testing. Platelet function testing might not only yield clinical benefits for the patients but also economical advantages by identifying the right drug at the right dose for the right patient. This article intends to provide an overview of the current platelet function tests such as light transmittance aggregometry, whole blood impedance aggregometry, the PFA-1001 system, the VerifyNow2 system, flow cytometry, as well as other promising technologies like Plateletworks3, IMPACT-R4, PADA, thromboelastography, and the mean platelet component (MPC), briefly addressing strengths, weaknesses and clinical utility of these tests.
Collapse
Affiliation(s)
- A R Rechner
- Assay Development Haemostasis, Emil-von-Behring-Str. 76, 35041 Marburg, Germany.
| |
Collapse
|
42
|
Effects of different doses, enteric-coated preparation of aspirin, and sex on urinary 11-dehydrothromboxane B2 in healthy volunteers. Blood Coagul Fibrinolysis 2010; 21:649-52. [DOI: 10.1097/mbc.0b013e32833cea2c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
43
|
Harrison P. The influence of citrate concentrations on PFA-100 closure times, platelet hyper-reactivity and aspirin monitoring. Thromb Res 2010; 126:e137-8. [DOI: 10.1016/j.thromres.2009.11.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 10/28/2009] [Accepted: 11/02/2009] [Indexed: 10/20/2022]
|
44
|
Feher G, Feher A, Pusch G, Koltai K, Tibold A, Gasztonyi B, Papp E, Szapary L, Kesmarky G, Toth K. Clinical importance of aspirin and clopidogrel resistance. World J Cardiol 2010; 2:171-86. [PMID: 21160749 PMCID: PMC2998916 DOI: 10.4330/wjc.v2.i7.171] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 06/02/2010] [Accepted: 06/09/2010] [Indexed: 02/06/2023] Open
Abstract
Aspirin and clopidogrel are important components of medical therapy for patients with acute coronary syndromes, for those who received coronary artery stents and in the secondary prevention of ischaemic stroke. Despite their use, a significant number of patients experience recurrent adverse ischaemic events. Interindividual variability of platelet aggregation in response to these antiplatelet agents may be an explanation for some of these recurrent events, and small trials have linked "aspirin and/or clopidogrel resistance", as measured by platelet function tests, to adverse events. We systematically reviewed all available evidence on the prevalence of aspirin/clopidogrel resistance, their possible risk factors and their association with clinical outcomes. We also identified articles showing possible treatments. After analyzing the data on different laboratory methods, we found that aspirin/clopidogrel resistance seems to be associated with poor clinical outcomes and there is currently no standardized or widely accepted definition of clopidogrel resistance. Therefore, we conclude that specific treatment recommendations are not established for patients who exhibit high platelet reactivity during aspirin/clopidogrel therapy or who have poor platelet inhibition by clopidogrel.
Collapse
Affiliation(s)
- Gergely Feher
- Gergely Feher, Andrea Feher, Gabriella Pusch, Laszlo Szapary, Department of Neurology, University of Pecs, Pecs, Baranya, H-7623, Hungary
| | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Derhaschnig U, Schweeger-Exeli I, Marsik C, Cardona F, Minuz P, Jilma B. Effects of aspirin and NO-aspirin (NCX 4016) on platelet function and coagulation in human endotoxemia. Platelets 2010; 21:320-8. [DOI: 10.3109/09537101003735572] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
46
|
Solomon C, Hartmann J, Osthaus A, Schöchl H, Raymondos K, Koppert W, Rahe-Meyer N. Platelet concentrates transfusion in cardiac surgery in relation to preoperative point-of-care assessment of platelet adhesion and aggregation. Platelets 2010; 21:221-8. [DOI: 10.3109/09537100903560155] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
47
|
Linnemann B, Schwonberg J, Toennes SW, Mani H, Lindhoff-Last E. Variability of residual platelet function despite clopidogrel treatment in patients with peripheral arterial occlusive disease. Atherosclerosis 2010; 209:504-9. [PMID: 20153859 DOI: 10.1016/j.atherosclerosis.2009.05.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Revised: 03/08/2009] [Accepted: 05/03/2009] [Indexed: 10/19/2022]
Abstract
Residual platelet function despite treatment with clopidogrel may predict an unfavourable cardiovascular outcome. The majority of studies have investigated the effects of clopidogrel administration in conjunction with aspirin in patients undergoing percutaneous coronary intervention. The primary objective of the present study was to assess the platelet response to clopidogrel in the absence of aspirin in patients with peripheral arterial occlusive disease (PAOD) and to investigate whether non-responsiveness to clopidogrel is reproducible during long-term follow-up. Fifty-four clinically stable PAOD patients on a maintenance dose of 75 mg/d clopidogrel were enrolled in this study. Platelet function was assessed at baseline and after a median follow-up of 18 months using light transmittance aggregometry (LTA) with 2 microM ADP as an agonist. HPLC-coupled mass spectrometry was used to detect clopidogrel and clopidogrel carboxylic acid, the main metabolite of clopidogrel. Residual platelet function, as defined by late aggregation values within the reference range (i.e., >43%), was observed in 35.2% of patients at baseline and 17.6% during follow-up. During the observation period, 26.5% had switched from responder to non-responder status or vice versa. Among non-responders, either clopidogrel or its metabolite was detected in 89.5% and 83.3% of patients at baseline and at follow-up, respectively. We conclude that non-responsiveness to clopidogrel as determined by ADP-induced LTA is not stable over time. This phenomenon cannot be attributed to non-compliance alone.
Collapse
Affiliation(s)
- Birgit Linnemann
- Division of Vascular Medicine, Department of Internal Medicine, J.W. Goethe University Hospital, Frankfurt/Main, Germany.
| | | | | | | | | |
Collapse
|
48
|
Reny JL, Bonvini R, Barazer I, Berdagué P, de Moerloose P, Schved JF, Gris JC, Fontana P. Le concept de « résistance » à l’aspirine : mécanismes et pertinence clinique. Rev Med Interne 2009; 30:1020-9. [DOI: 10.1016/j.revmed.2009.02.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Revised: 02/03/2009] [Accepted: 02/15/2009] [Indexed: 11/29/2022]
|
49
|
Azam SM, Jozic J. Variable platelet responsiveness to aspirin and clopidogrel: role of platelet function and genetic polymorphism testing. Transl Res 2009; 154:309-13. [PMID: 19931197 DOI: 10.1016/j.trsl.2009.09.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 09/29/2009] [Accepted: 09/29/2009] [Indexed: 12/19/2022]
Abstract
Dual antiplatelet therapy with aspirin and clopidogrel is the standard treatment for patients with an acute coronary syndrome or percutaneous coronary intervention. However, at standard doses, many patients still experience an adverse cardiovascular event. Numerous studies have demonstrated that a laboratory assessment of platelet resistance to an antiplatelet medication is associated with adverse outcomes. The gold standard in assessing platelet function is light transmittance aggregometry. However, because of the time necessary to complete the test, the need for skilled technicians, and the associated costs, newer point-of-care tests have been developed to assess rapidly an individual's platelet responsiveness. Although numerous studies demonstrate an association with adverse outcomes and platelet resistance, currently no clinical trial results demonstrate a treatment strategy to mitigate the adverse outcomes associated with platelet resistance. Studies currently underway are evaluating treatment options for a laboratory assessment of platelet resistance, such as increasing the clopidogrel maintenance dose. Until such results are available, routine testing of platelet resistance to aspirin or clopidogrel should be used only in a research setting.
Collapse
Affiliation(s)
- Salman M Azam
- University Hospitals Case Medical Center, Harrington-McLaughlin Heart and Vascular Institute, Cleveland, Ohio 44106, USA
| | | |
Collapse
|
50
|
Affiliation(s)
- Udaya S Tantry
- Sinai Center for Thrombosis Research, Baltimore, MD, USA
| | | | | |
Collapse
|