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Plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation
BACKGROUND: Microclots, a term also used for amyloid fibrin(ogen) particles and henceforth named aggregates, have recently been reported in the plasma of patients with COVID-19 and long COVID. These aggregates have been implicated in the thrombotic complications of these diseases. METHODS: Plasma sa...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9883810/ https://www.ncbi.nlm.nih.gov/pubmed/36709220 http://dx.doi.org/10.1038/s43856-023-00242-8 |
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author | Baker, Stephen R. Halliday, Georgia Ząbczyk, Michal Alkarithi, Ghadir Macrae, Fraser L. Undas, Anetta Hunt, Beverley J. Ariëns, Robert A. S. |
author_facet | Baker, Stephen R. Halliday, Georgia Ząbczyk, Michal Alkarithi, Ghadir Macrae, Fraser L. Undas, Anetta Hunt, Beverley J. Ariëns, Robert A. S. |
author_sort | Baker, Stephen R. |
collection | PubMed |
description | BACKGROUND: Microclots, a term also used for amyloid fibrin(ogen) particles and henceforth named aggregates, have recently been reported in the plasma of patients with COVID-19 and long COVID. These aggregates have been implicated in the thrombotic complications of these diseases. METHODS: Plasma samples from 35 patients with acute pulmonary embolism were collected and analysed by laser scanning confocal microscopy and scanning electron microscopy before and after clotting. RESULTS: Here we confirm the presence of aggregates and show that they also occur in the plasma of patients with pulmonary embolism, both before and after clotting. Aggregates vary in size and consist of fibrin and platelets. We show that treatment with low-molecular weight heparin reduces aggregates in the samples of patients with pulmonary embolism. Double centrifugation of plasma does not eliminate the aggregates. CONCLUSIONS: These data corroborate the existence of microclots or aggregates in diseases associated with venous thromboembolism. Important questions are raised regarding their pathophysiological relevance and further studies are warranted to investigate whether they represent cause or consequence of clinical thrombosis. |
format | Online Article Text |
id | pubmed-9883810 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-98838102023-01-30 Plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation Baker, Stephen R. Halliday, Georgia Ząbczyk, Michal Alkarithi, Ghadir Macrae, Fraser L. Undas, Anetta Hunt, Beverley J. Ariëns, Robert A. S. Commun Med (Lond) Article BACKGROUND: Microclots, a term also used for amyloid fibrin(ogen) particles and henceforth named aggregates, have recently been reported in the plasma of patients with COVID-19 and long COVID. These aggregates have been implicated in the thrombotic complications of these diseases. METHODS: Plasma samples from 35 patients with acute pulmonary embolism were collected and analysed by laser scanning confocal microscopy and scanning electron microscopy before and after clotting. RESULTS: Here we confirm the presence of aggregates and show that they also occur in the plasma of patients with pulmonary embolism, both before and after clotting. Aggregates vary in size and consist of fibrin and platelets. We show that treatment with low-molecular weight heparin reduces aggregates in the samples of patients with pulmonary embolism. Double centrifugation of plasma does not eliminate the aggregates. CONCLUSIONS: These data corroborate the existence of microclots or aggregates in diseases associated with venous thromboembolism. Important questions are raised regarding their pathophysiological relevance and further studies are warranted to investigate whether they represent cause or consequence of clinical thrombosis. Nature Publishing Group UK 2023-01-28 /pmc/articles/PMC9883810/ /pubmed/36709220 http://dx.doi.org/10.1038/s43856-023-00242-8 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Baker, Stephen R. Halliday, Georgia Ząbczyk, Michal Alkarithi, Ghadir Macrae, Fraser L. Undas, Anetta Hunt, Beverley J. Ariëns, Robert A. S. Plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation |
title | Plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation |
title_full | Plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation |
title_fullStr | Plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation |
title_full_unstemmed | Plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation |
title_short | Plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation |
title_sort | plasma from patients with pulmonary embolism show aggregates that reduce after anticoagulation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9883810/ https://www.ncbi.nlm.nih.gov/pubmed/36709220 http://dx.doi.org/10.1038/s43856-023-00242-8 |
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