Special Issue "Molecular Research on Thrombotic Microangiopathy and Thrombotic Complications"

A special issue of Biomolecules (ISSN 2218-273X). This special issue belongs to the section "Molecular Medicine".

Deadline for manuscript submissions: 30 September 2023 | Viewed by 665

Special Issue Editors

Koltzov Institute of Developmental Biology, Russian Academy of Sciences, RAS, Moscow, Russia
Interests: receptors; signalling systems; von Willebrand factor; endothelial cells; calcium; thrombotic microangiopathy
Department of Pediatrics, Russian Medical Academy of Continuous Professional Education, Moscow, Russia
Interests: atypical HUS; complement; doppler ultrasonography; ultrasonography; diffusion magnetic resonance imaging

Special Issue Information

Dear Colleagues,

Thrombotic microangiopathy (TMA) is a pathological syndrome characterized by microangiopathic hemolytic anemia (MAHA), thrombocytopenia, and organ damage, primarily of the kidney and brain. Several approaches have been proposed for classification of TMA, each taking into account various aspects, such as genetic predisposition and secondary causes, violations of complement function or von Willebrand factor metabolism, dependence on pregnancy, transplantation, oncological diseases, the influence of drugs, etc. The molecular mechanisms causing TMA are diverse and not fully understood. The pathogenesis of thrombotic thrombocytopenic purpura and hemolytic uremic syndrome are the most studied forms of TMA. There is less clarity regarding other forms of TMA. The key reason for the development of TMA is damage of the microvascular endothelium. However, the mechanisms of endotheliopathy remain poorly understood. The purpose of this Special Issue is to present, analyze and summarize the latest data on the molecular and cellular mechanisms of the development of various forms of TMA and thrombotic complications. Of interest are articles that will characterize the pathogenetic mechanisms of TMA associated with other comorbidities. Another objective of the Issue is to consider the effectiveness of new approaches to the treatment of TMA, based on the use of new drugs that affect the main pathogenetic links of this disease.

Dr. Pavel Avdonin
Dr. Galina A. Generalova
Dr. Vasily Nikolaevich Sukhorukov
Guest Editors

Manuscript Submission Information

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Keywords

  • thrombotic mycroangiopathy
  • von Willebrand factor
  • endothelium
  • complement
  • hemolytic uremic syndrome
  • drugs
  • pathology
  • cardiovascular diseases
  • thrombotic complications
  • comorbidities

Published Papers (1 paper)

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Research

Article
Effects of Antiplatelet Drugs on Platelet-Dependent Coagulation Reactions
Biomolecules 2023, 13(7), 1124; https://doi.org/10.3390/biom13071124 - 14 Jul 2023
Viewed by 476
Abstract
Activated platelets are involved in blood coagulation by exposing phosphatidylserine (PS), which serves as a substrate for assembling coagulation complexes. Platelets accelerate fibrin formation and thrombin generation, two final reactions of the coagulation cascade. We investigated the effects of antiplatelet drugs on platelet [...] Read more.
Activated platelets are involved in blood coagulation by exposing phosphatidylserine (PS), which serves as a substrate for assembling coagulation complexes. Platelets accelerate fibrin formation and thrombin generation, two final reactions of the coagulation cascade. We investigated the effects of antiplatelet drugs on platelet impact in these reactions and platelet ability to expose PS. Washed human platelets were incubated with acetylsalicylic acid (ASA), ticagrelor, ASA in combination with ticagrelor, ruciromab (glycoprotein IIb-IIIa antagonist), or prostaglandin E1 (PGE1). Platelets were not activated or activated by collagen and sedimented in multiwell plates, and plasma was added after supernatant removal. Fibrin formation (clotting) was monitored in a recalcification assay by light absorbance and thrombin generation in a fluorogenic test. PS exposure was assessed by annexin V staining using flow cytometry. Ticagrelor (alone and in combination with ASA), ruciromab, and PGE1, but not ASA, prolonged the lag phase and decreased the maximum rate of plasma clotting and decreased the peak and maximum rate of thrombin generation. Inhibition was observed when platelets were not treated with exogenous agonists (activation by endogenous thrombin) and pretreated with collagen. Ticagrelor (alone and in combination with ASA), ruciromab, and PGE1, but not ASA, decreased PS exposure on washed platelets activated by thrombin and by thrombin + collagen. PS exposure on activated platelets in whole blood was lower in patients with acute coronary syndrome receiving ticagrelor + ASA in comparison with donors free of medications. These results indicate that antiplatelet drugs are able to suppress platelet coagulation activity not only in vitro but also after administration to patients. Full article
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