Abstract
IR780 is a near infrared (NIR) dye with a huge potential to be applied in cancer phototherapy and imaging. However, IR780 poor water solubility and acute cytotoxicity limit its direct use in cancer theragnostic. Herein, a novel Hyaluronic acid (HA)-based amphiphilic polymer was used, for the first time, in the preparation of polymeric nanoparticles (HPN) encapsulating IR780 aimed to be applied in breast cancer therapy. Furthermore, HPN co-encapsulating IR780 and Doxorubicin (DOX) were also produced in order to further enhance the therapeutic effectiveness of this nanoformulation. The results revealed that HPN were able to successfully encapsulate IR780 (IR-HPN) and the IR780-DOX combination (IR/DOX-HPN). Furthermore, the encapsulation of IR780 in HPN improved its absorption at 808 nm by about 2.2-fold, thereby enhancing its photothermal potential, as well as its cytocompatibility. The 2D in vitro cell uptake studies demonstrated that the nanostructures displayed a higher internalization by breast cancer cells than by normal cells. In addition, the assays performed in 3D in vitro models of breast cancer revealed that HPN can penetrate into spheroids. Furthermore, the 3D in vitro studies also demonstrated that the combined applic...Continue Reading
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