Magnetic Coagulometry: Towards a New Nanotechnological Tool for ex vivo Monitoring Coagulation in Human Whole Blood

Santana-Otero, Antonio; Harper, Alan; Telling, Neil D; Ortega, Daniel; Cabrera, David

Abstract

Blood clotting disorders consisting of unwanted blood clot formation or excessive bleeding are some of the main causes of death worldwide. However, there are significant limitations in the current methods used to clinically monitoring the dynamics of clot formation in human whole blood ex vivo. Here a new magnetic coagulometry platform for testing ex vivo coagulation is described. This platform exploits the sensitivity of the out-of-phase component of alternating current (AC) magnetic susceptibility (χ’’) to variations in mobility and agglomeration of magnetic nanoparticles when trapped during blood clot formation. By labelling human whole blood with magnetic nanoparticles, the out-of-phase component of AC magnetic susceptibility shows that the dynamics of blood clot formation correlates with a decrease in the out-of-phase component χ’’ over time activation of coagulation. This is caused by a rapid immobilization of nanoparticles upon blood coagulation and compaction. In contrast, this rapid fall in the out-of-phase component χ’’ is significantly slowed down when blood is pre-treated with three different anticoagulant drugs. Remarkably, the system showed sensitivity towards the effect of clinically used direct oral anticoagulation (DOAC) drugs in whole blood coagulation, in contrast to the inability of clinical routine tests prothrombin time (PT) and partial thromboplastin time (PTT) to efficiently monitoring this effect. Translation of this nanomagnetic approach into clinic can provide a superior method for monitoring blood coagulation and improve the efficiency of the current diagnostic techniques.

Citation

Santana-Otero, A., Harper, A., Telling, N. D., Ortega, D., & Cabrera, D. (in press). Magnetic Coagulometry: Towards a New Nanotechnological Tool for ex vivo Monitoring Coagulation in Human Whole Blood. Nanoscale, https://doi.org/10.1039/d3nr02593d

• Journal Article Type: Article
• Acceptance Date: Dec 19, 2023
• Online Publication Date: Dec 21, 2023
• Deposit Date: Jan 17, 2024
• Journal: Nanoscale
• Print ISSN: 2040-3364
• Electronic ISSN: 2040-3372
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1039/d3nr02593d
• Keywords: General Materials Science
• Publisher URL: https://pubs.rsc.org/en/Content/ArticleLanding/2024/NR/D3NR02593D