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Article Abstract
The aim of the present study was to investigate the potential of human plasma derived exosomes for the delivery of hydroxyurea to enhance its therapeutic efficacy in breast cancer. Plasma derived exosomes were isolated using differential centrifugation along with ultrafiltration method. Hydroxyurea was encapsulated in exosomes using a freeze-thaw method. The exosomes and Exo-HU were characterized for their size distribution, drug entrapment efficiency, in-vitro drug release profile, morphological analysis and cytotoxic effects on MCF-7 cell line. The results showed a mean size of 178.8 nm and a zeta potential of -18.3 mV, indicating good stability and 70% encapsulation effectiveness for HU. Exo-HU produced sustained drug release action with a considerable percentage released within 72 h. The morphological analysis indicated that the plasma derived exosomes were spherical, and cup shaped. In cytotoxicity studies on MCF-7 cells, Exo-HU has reduced cell viability compared to HU and blank exosomes. Findings of this study showed that human plasma-derived exosomes have been considered as effective delivery vehicle for hydroxyurea, potentially improving breast cancer treatment outcomes.
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