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Lookup NU author(s): Dr Ankita Das
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Tissue plasminogen activators induce enzymatic activation of plasminogen to plasmin that cleaves fibrin strands in blood clots. In the present study, extracellular vesicles such as exosomes from fibrosarcoma cell line HT1080 were utilized as clot-busting agents. These exosomes were being used for clot lysis of whole blood which showed 28% lysis within 10 h, which was comparable to that of the streptokinase (commercial plasmin activator) with no significant difference. These exosomes were able to facilitate the migration of endothelial cells in a scratch wound assay where normalized wound area remaining was 7.5% at 18 h. Also, exosomes aided in attenuation of oxidative stress generated on the cells, thereby maintaining cell viability. These exosomes were further encapsulated in a thermo-responsive polymer for better localized delivery that showed no cytotoxic effects, and sustained delivery was achieved up to a concentration of 117 µg/mL in 25 days, which corresponds to around 65% of the total amount of exosomes added. When a combination of exosomes and thermo–responsive polymer was utilized, the clot lysis activity reached to around 22% in 72 h. Thus, it proves the potential of this combinatorial approach which can be effectively used for thrombus degradation and healing of endothelium lining in damaged blood vessels.
Author(s): Das A, Nikhil A, Kumar A
Publication type: Article
Publication status: Published
Journal: Colloids and Surfaces B: Biointerfaces
Year: 2022
Volume: 216
Print publication date: 01/08/2022
Online publication date: 18/05/2022
Acceptance date: 14/05/2022
ISSN (print): 0927-7765
ISSN (electronic): 1873-4367
Publisher: Elsevier
URL: https://doi.org/10.1016/j.colsurfb.2022.112580
DOI: 10.1016/j.colsurfb.2022.112580
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