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Source: Platelets
Condition: Bleeding
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Total 46 results found since Jan 2013.
Intravenous abciximab as a rescue therapy for immediate reocclusion after successful mechanical thrombectomy in acute ischemic stroke patients
Conclusions - Our results underscore a key role for platelet aggregation and the potential of Glycoprotein IIb/IIIa antagonists as a rescue therapy in post-MT immediate reocclusion.PMID:33840346 | DOI:10.1080/09537104.2021.1894326
Source: Platelets - April 12, 2021 Category: Hematology Authors: Fran çois Delvoye Stephane Loyau Julien Labreuche Guillaume Taylor Benjamin Maier Michel Piotin Raphael Blanc Simon Escalard Lucas Di Meglio Malek Ben Maacha Hocine Redjem Stanislas Smajda Gabriele Ciccio Sol ène Hébert Candice Sabben Martine Jandrot-P Source Type: research
Antiplatelet effects of clopidogrel and aspirin after interventional patent foramen ovale/ atrium septum defect closure.
In this study, we aimed to analyze the incidence of high on-treatment platelet reactivity (HTPR) to antiplatelet medication in patients undergoing PFO/ASD closure as well as clinical complications and thrombus formation on the occluder during six-month follow-up. This hypothesis generating pilot study was observed, which included 140 patients undergoing PFO/ASD closure. The primary endpoint was pharmacodynamic response to antiplatelet medication. A composite of death, myocardial infarction, bleeding, stroke and thrombus formation on the occluder during six-month follow-up was the secondary endpoint. HTPR to clopidogrel was...
Source: Platelets - February 14, 2016 Category: Hematology Tags: Platelets Source Type: research
Inhibition of NMDA receptor function with an anti-GluN1-S2 antibody impairs human platelet function and thrombosis.
This study investigated whether anti-GluN1-mediated neuroprotection involves inhibition of platelet function. Four commercial anti-GluN1 antibodies were screened for their abilities to inhibit human platelet aggregation. Haematological parameters were examined in rats vaccinated with GluN1. Platelet effects of a mouse monoclonal antibody targeting the glycine-binding region of GluN1 (GluN1-S2) were tested in assays of platelet activation, aggregation and thrombus formation. The epitope of anti-GluN1-S2 was mapped and the mechanism of antibody action modelled using crystal structures of GluN1. Our work found that rats vacci...
Source: Platelets - March 11, 2017 Category: Hematology Tags: Platelets Source Type: research
Platelet reactivity-adjusted antiplatelet therapy in patients with percutaneous coronary intervention: a meta-analysis of randomized controlled trials.
Authors: Xing Z, Tang L, Zhu Z, Huang J, Peng X, Hu X
Abstract
Numerous number of evidences show that high on-treatment platelet reactivity is a well-known risk factor for adverse events in patients after percutaneous coronary intervention (PCI). Controversial situations still exist regarding the effectiveness of tailoring antiplatelet therapy according to platelet function monitoring. The PubMed, Embase, and Cochrane Central databases were searched for randomized trials comparing platelet reactivity-adjusted antiplatelet therapy with conventional antiplatelet therapy in patients undergoing PCI. The primary end poi...
Source: Platelets - September 14, 2017 Category: Hematology Tags: Platelets Source Type: research
Clinical utility of remote platelet function measurement using P-selectin: assessment of aspirin, clopidogrel, and prasugrel and bleeding disorders.
Authors: Bath PM, May J, Heptinstall S
Abstract
Vascular diseases such as myocardial infarction and ischemic stroke are associated with increased platelet function whilst the risk of recurrence is reduced by antiplatelet agents such as aspirin, clopidogrel, and prasugrel. However, some patients exhibit high platelet reactivity, especially with clopidogrel. Existing platelet function tests may not be ideal in that they can be expensive, are often time consuming, and measurements must be made near to the patient and within a few hours of blood collection. Platelet activation leads to translocation of P-selectin from ...
Source: Platelets - April 20, 2018 Category: Hematology Tags: Platelets Source Type: research
Long-term and short-term duration of thienopyridine therapy after coronary stenting in patients with chronic kidney disease a meta-analysis of literature studies.
Authors: Wu Y, Song Y, Pan Y, Gong Y, Zhou Y
Abstract
The study aimed to compare the efficacy and safety outcome associated with a short and a prolonged duration of thienopyridine therapy in patients with chronic kidney disease (CKD) after coronary stenting. We systematically searched PubMed, EMBASE and the Cochrane Library from their inception to 1 January 2019 for studies comparing short and prolonged thienopyridine therapy in patients with CKD. Ischemic and bleeding events were considered as the clinical endpoints in this analysis. Odds Ratios (OR) with 95% confidence intervals (CIs) were used as estimates of ef...
Source: Platelets - August 1, 2019 Category: Hematology Tags: Platelets Source Type: research
Efficacy and safety of abciximab versus tirofiban in addition to ticagrelor in STEMI patients undergoing primary percutaneous intervention.
The objectives were to assess the efficacy and safety of abciximab versus tirofiban in patients with ST-elevation acute myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PPCI) and pretreated with ticagrelor, and to identify independent predictor factors of efficacy, bleeding and platelet drop. Three hundred sixty-two patients were divided by GPI administered. Clinical, laboratory, angiographic and outcome characteristics were compared. The primary objective was a composite efficacy endpoint (death from any cause, nonfatal myocardial infarction and nonfatal stroke) at 30 days. The seconda...
Source: Platelets - February 10, 2021 Category: Hematology Tags: Platelets Source Type: research
Platelets and vascular integrity.
Authors: Deppermann C
Abstract
Platelets patrol the vasculature and adhere at sites of vascular damage after trauma to limit blood loss. In recent years, however, it has become clear that platelets also contribute to pathophysiologic processes such as thrombosis, atherosclerosis, stroke, sepsis and many more. An exciting new role for them is in non-classical hemostasis to prevent bleeding in the inflamed vasculature. Recent studies suggest that GPVI, CLEC-2, integrin αIIbβ3 (GPIIb/IIIa), and the content of platelet α- and dense granules are important players in this process. This review summarizes the current kn...
Source: Platelets - February 17, 2018 Category: Hematology Tags: Platelets Source Type: research
Using flow cytometry to monitor glycoprotein IIb-IIIa activation.
Authors: Frelinger AL
Abstract
Platelet-to-platelet aggregation is critical to the formation of hemostatic thrombi which limit bleeding following vascular injury and also contributes to obstructive thrombi in acute myocardial infarction, stroke, or other thrombotic diseases. Platelet aggregation is mediated by platelet surface glycoprotein (GP) IIb-IIIa (integrin αIIbβ3, CD41/61) on adjacent platelets. Upon platelet activation by adenosine diphosphate (ADP), thrombin, or other platelet agonists, GPIIb-IIIa undergoes conformational changes from a "resting" bent conformation to an "activated" extended conformation....
Source: Platelets - May 30, 2018 Category: Hematology Tags: Platelets Source Type: research
Equilibrative nucleoside transporter 1 gene polymorphisms and clinical outcomes following acute coronary syndromes: findings from the PLATelet inhibition and patient Outcomes (PLATO) study.
Authors: Parker WAE, Eriksson N, Becker RC, Voora D, Åkerblom A, Himmelmann A, James SK, Wallentin L, Storey RF, PLATO Investigators
Abstract
In the PLATelet inhibition and patient Outcomes (PLATO) study, the P2Y12 inhibitors ticagrelor and clopidogrel were compared in the treatment of acute coronary syndromes (ACS). Ticagrelor was shown to reduce occurrence of the primary end point - a composite of death from vascular causes, myocardial infarction, or stroke - compared to clopidogrel. Ticagrelor's pleiotropic effects on reuptake of adenosine via inhibition of equilibrative nucleoside transporter 1 (ENT1) have bee...
Source: Platelets - June 2, 2018 Category: Hematology Tags: Platelets Source Type: research
Pharmacodynamic safety of clopidogrel monotherapy in patients under oral anticoagulation with a vitamin K antagonist undergoing coronary stent implantation.
This study enrolled 100 patients on aspirin plus clopidogrel (DAPT-cohort, without indication for VKA) and 100 patients on clopidogrel monotherapy plus phenprocoumon (OAC-cohort) undergoing elective PCI. Platelet reactivity was assessed by impedance aggregometry on day 1 following PCI. Ischemic (death, stroke, or myocardial infarction) and bleeding (BARC 2-5) events within 12 months were compared in a propensity score adjusted model. Platelet reactivity was not different in the OAC- and DAPT-cohort (187 [127-242] vs. 167 [126-218] AU×min; p = 0.23). Overall, 17 ischemic and 34 bleeding events were recorded during follo...
Source: Platelets - September 14, 2018 Category: Hematology Tags: Platelets Source Type: research
De-escalation versus standard dual antiplatelet therapy in patients undergoing percutaneous coronary intervention: a systematic review and meta-analysis.
In conclusion, de-escalation of antiplatelet therapy is associated with nonsignificant differences in both ischemic events and major bleeding compared with standard potent antiplatelet therapy in patients undergoing percutaneous coronary intervention. The feasibility and even superiority of this strategy need to be elucidated by further randomized trials.
PMID: 30759033 [PubMed - as supplied by publisher]
Source: Platelets - February 15, 2019 Category: Hematology Tags: Platelets Source Type: research
Efficacy and safety of switching from ticagrelor to clopidogrel during the early and late phase in acute coronary syndrome patients after percutaneous coronary intervention.
The objective of the present study was to investigate the efficacy and safety of de-escalation in early and late phase after percutaneous coronary intervention (PCI). We performed a retrospective study of 4678 ACS patients from March 2016 to April 2017 who initially received ticagrelor then de-escalated to clopidogrel and categorized them into Group 1: early phase (1-30 days) and Group 2: late phase (>30 days-1 year) switching groups. The primary efficacy endpoints included cardiovascular death, definite/probable stent thrombosis, myocardial infarction, unplanned revascularization, and stroke. The safety endpoint was...
Source: Platelets - May 4, 2019 Category: Hematology Tags: Platelets Source Type: research
