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Thrombus composition and thrombolysis resistance in stroke
Res Pract Thromb Haemost. 2023 May 16;7(4):100178. doi: 10.1016/j.rpth.2023.100178. eCollection 2023 May.ABSTRACTA State of the Art lecture titled "Thrombus Composition and Thrombolysis Resistance in Stroke" was presented at the ISTH Congress in 2022. Intravenous thrombolysis (IVT) remains the only pharmacologic option to re-establish cerebral perfusion at the acute phase of ischemic stroke. IVT is based on the administration of recombinant tissue plasminogen activator with the objective of dissolving fibrin, the major fibrillar protein component of thrombi. Almost 30 years on from its introduction, although the clinical b...
Source: Thrombosis and Haemostasis - August 4, 2023 Category: Hematology Authors: Benoit Ho-Tin-No é Jean-Philippe Desilles Mikael Mazighi Source Type: research

Erythrocyte aggregation in sudden flow arrest is linked to hyperthermia, hypoxemia and band 3 availability
CONCLUSIONS: We show that the C-terminal domain of band 3 plays a pivotal role in RBC aggregation. Further, aggregation is enhanced by hyperthermia and hypoxemia.PMID:35841276 | DOI:10.1111/jth.15821
Source: Thrombosis and Haemostasis - July 16, 2022 Category: Hematology Authors: Samantha Weber-Fishkin Harrison S Seidner Geoffrey Gunter Mary D Frame Source Type: research

Association of antithrombotic medications and composition of thrombi retrieved by mechanical thrombectomy in acute ischemic stroke
Timely restoration of blood perfusion through thrombolysis and/or mechanical thrombectomy (MT) is an important step in salvaging ischemic brain in stroke patients. MT has opened an avenue for histological evaluation of thrombi and over the last couple of years our knowledge on the thromboembolus histological and mechanical properties and effects of these properties on the success of MT has grown significantly [1,2]. Two major classes of antithrombotic therapies, including antiplatelet and anticoagulant drugs, have been used for both management and prevention of stroke.
Source: Thrombosis Research - September 26, 2021 Category: Hematology Authors: Mehdi Abbasi, Oana Madalina Mereuta, Sean F. Fitzgerald, Daying Dai, Alejandro A. Rabinstein, Ramanathan Kadirvel, David F. Kallmes, Waleed Brinjikji Tags: Letter to the Editors-in-Chief Source Type: research

Fibrin Modulates Shear-Induced NETosis in Sterile Occlusive Thrombi Formed under Haemodynamic Flow.
Abstract Neutrophils can release extracellular traps (NETs) in infectious, inflammatory and thrombotic diseases. NETs have been detected in deep vein thrombosis, atherothrombosis, stroke, disseminated intravascular coagulation and trauma. We have previously shown that haemodynamic forces trigger rapid NETosis within sterile occlusive thrombi in vitro. Here, we tested the effects of thrombin, fibrin and fibrinolysis on shear-induced NETosis by imaging NETs with Sytox Green during microfluidic perfusion of factor XIIa-inhibited or thrombin-inhibited human whole blood over fibrillar collagen (±tissue factor). For pe...
Source: Thrombosis and Haemostasis - February 5, 2019 Category: Hematology Authors: Yu X, Diamond SL Tags: Thromb Haemost Source Type: research

Efficacy and Safety of Direct Oral Factor Xa Inhibitors in 795 Morbidly Obese Patients
Conclusions: Our study is the largest study examining morbidly obese patients on DOACS and provides further evidence of comparable efficacy and safety of the direct oral anti-Xa inhibitors, compared to warfarin, in morbidly obese patients with AF and VTE.DisclosuresKushnir: Janssen: Research Funding. Billett: Bayer: Consultancy; Janssen: Research Funding.
Source: Blood - November 21, 2018 Category: Hematology Authors: Kushnir, M., Choi, Y., Eisenberg, R., Rao, D., Tolu, S., Gao, J., Mowrey, W., Billett, H. H. Tags: 332. Antithrombotic Therapy: Management of Challenging Patients and Scenarios Source Type: research

Acute management of hemostasis in patients with neurological injury
Neurological injuries can be divided into those with traumatic and non-traumatic causes. The largest groups are traumatic brain injury (TBI) and non-traumatic stroke. TBI patients may present with intracranial hemorrhages (contusions, subdural-, or epidural hematomas). Strokes are ischemic or hemorrhagic. In all these disorders thrombosis and hemostasis play a major role. Treatment aims to either cease bleeding and/or restore perfusion. We reviewed hemostatic and thrombolytic therapies in patients with neurological injuries by MEDLINE and EMBASE search using various key words for neurological disorders and hemostatic thera...
Source: Transfusion Medicine Reviews - July 13, 2017 Category: Hematology Authors: M. Irem Baharoglu, Anneke Brand, Maria M. Koopman, Marinus Vermeulen, Yvo B.W.E.M. Roos Source Type: research

ADAMTS13 controls vascular remodeling by modifying VWF reactivity during stroke recovery
Angiogenic response is essential for ischemic brain repair. The von Willebrand factor (VWF)–cleaving protease disintegrin and metalloprotease with thrombospondin type I motif, member 13 (ADAMTS13) is required for endothelial tube formation in vitro, but there is currently no in vivo evidence supporting a function of ADAMTS13 in angiogenesis. Here we show that mice deficient in ADAMTS13 exhibited reduced neovascularization, brain capillary perfusion, pericyte and smooth muscle cell coverage on microvessels, expression of the tight junction and basement membrane proteins, and accelerated blood-brain barrier (BBB) break...
Source: Blood - July 6, 2017 Category: Hematology Authors: Xu, H., Cao, Y., Yang, X., Cai, P., Kang, L., Zhu, X., Luo, H., Lu, L., Wei, L., Bai, X., Zhu, Y., Zhao, B.-Q., Fan, W. Tags: Plenary Papers, Thrombosis and Hemostasis, Vascular Biology Source Type: research

Hematocrit and Stroke: A Forgotten and Neglected Link?
Semin Thromb Hemost DOI: 10.1055/s-0037-1602663Stroke is considered among the most common causes of mortality and disability, leading to dramatic socioeconomic consequences. From a pathophysiologic perspective, enhanced blood viscosity due to increased hematocrit might be associated with stroke through impaired cerebral blood perfusion. This association has remained rather neglected during previous decades, but newly emerged as an epicenter of scientific interest due to the unexpected elevation of stroke rates with sodium-glucose cotransporter-2 inhibitors, a new class of hypoglycemic drugs with otherwise dramatic cardiova...
Source: Seminars in Thrombosis and Hemostasis - June 13, 2017 Category: Hematology Authors: Stavropoulos, Konstantinos Imprialos, Konstantinos P. Bouloukou, Sofia Boutari, Chrysoula Doumas, Michael Tags: Review Article Source Type: research

Shear ‐sensitive nanocapsule drug release for site‐specific inhibition of occlusive thrombus formation
ConclusionsTargeted delivery of eptifibatide by shear‐sensitive nanocapsules offers site‐specific antiplatelet potential, and may form a basis for developing more potent and safer antiplatelet drugs.
Source: Journal of Thrombosis and Haemostasis - April 9, 2017 Category: Hematology Authors: C. P. Molloy, Y. Yao, H. Kammoun, T. Bonnard, T. Hoefer, K. Alt, F. Tovar ‐Lopez, G. Rosengarten, P. A. Ramsland, A. D. Meer, A. Berg, A. J. Murphy, C. E. Hagemeyer, K. Peter, E. Westein Tags: Original Article Source Type: research

Shear sensitive nanocapsule drug release for site specific inhibition of occlusive thrombus formation.
CONCLUSIONS: Targeted delivery of eptifibatide by shear-sensitive nanocapsules offers site specific antiplatelet potential and may form a basis for developing more potent and safer antiplatelet drugs. This article is protected by copyright. All rights reserved. PMID: 28267256 [PubMed - as supplied by publisher]
Source: Thrombosis and Haemostasis - March 6, 2017 Category: Hematology Authors: Molloy CP, Yao Y, Kammoun H, Bonnard T, Hoefer T, Alt K, Tovar-Lopez F, Rosengarten G, Ramsland PA, van der Meer AD, van den Berg A, Murphy AJ, Hagemeyer CE, Peter K, Westein E Tags: J Thromb Haemost Source Type: research

Stem cell mobilisation by granulocyte-colony stimulating factor in patients with acute myocardial infarction. Long-term results of the REVIVAL-2 trial.
In conclusion, these long-term follow-up data show that G-CSF does not improve clinical outcomes of patients with acute myocardial infarction. PMID: 26790705 [PubMed - as supplied by publisher]
Source: Thrombosis and Haemostasis - January 21, 2016 Category: Hematology Authors: Steppich B, Hadamitzky M, Ibrahim T, Groha P, Schunkert H, Laugwitz KL, Kastrati A, Ott I, Regenerate Vital Myocardium by Vigorous Activation of Bone Marrow Stem Cells (REVIVAL-2) Study Investigators Tags: Thromb Haemost Source Type: research

Lack of secondary microthrombosis after thrombin-induced stroke in mice and non-human primates.
CONCLUSIONS: Our data demonstrates that secondary microthrombosis does not occur after thrombin-induced stroke. In view of that, the pathophysiological roles of hematologic players promoting or protecting from secondary microthrombosis (such as Factor XII, von Willebrand Factor, T-cells…) deserve to be reevaluated in non-TMVO stroke models. This article is protected by copyright. All rights reserved. PMID: 24354644 [PubMed - as supplied by publisher]
Source: Thrombosis and Haemostasis - December 16, 2013 Category: Hematology Authors: Gauberti M, de Lizarrondo SM, Orset C, Vivien D Tags: J Thromb Haemost Source Type: research