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In vitro study: synthesis and evaluation of Fe3O4/CQD magnetic/fluorescent nanocomposites for targeted drug delivery, MRI, and cancer cell labeling applications

Fattahi Nafchi, R ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1021/acs.langmuir.1c03458
  3. Publisher: American Chemical Society , 2022
  4. Abstract:
  5. In the present study, first, Fe3O4nanoparticles were functionalized using glutaric acid and then composited with CQDs. Doxorubicin (DOX) drug was loaded to evaluate the performance of the nanocomposite for targeted drug delivery applications. The XRD pattern confirmed the presence of characteristic peaks of CQDs and Fe3O4. In the FTIR spectrum, the presence of carboxyl functional groups on Fe3O4/CQDs was observed; DOX (positive charge) is loaded onto Fe3O4/CQDs (negative charge) by electrostatic absorption. FESEM and AFM images showed that the particle sizes of Fe3O4and CQDs were 23-75 and 1-3 nm, respectively. The hysteresis curves showed superparamagnetic properties for Fe3O4and Fe3O4/CQDs (57.3 and 8.4 emu/g). The Fe3O4hysteresis curve showed superparamagnetic properties (Ms and Mr: 57.3 emu/g and 1.46 emu/g. The loading efficiency and capacity for Fe3O4/CQDs were 93.90% and 37.2 mg DOX/g MNP, respectively. DOX release from Fe3O4/CQDs in PBS showed pH-dependent release behavior where after 70 h at pH 5 and 7.4, about 50 and 21% of DOX were released. Fluorescence images of Fe3O4/CQD-treated cells showed that Fe3O4/CQDs are capable of labeling MCF-7 and HFF cells. Also, T2-weighted MRI scans of Fe3O4/CQDs in water exhibited high r2relaxivity (86.56 mM-1S-1). MTT assay showed that DOX-loaded Fe3O4/CQDs are highly biocompatible in contact with HFF cells (viability = 95%), but they kill MCF-7 cancer cells (viability = 45%). Therefore, the synthesized nanocomposite can be used in MRI, targeted drug delivery, and cell labeling. © 2022 American Chemical Society. All rights reserved
  6. Keywords:
  7. Absorption spectroscopy ; Biocompatibility ; Cells ; Controlled drug delivery ; Cytology ; Diseases ; Hysteresis ; Magnetic resonance imaging ; Superparamagnetism ; Targeted drug delivery ; Cancer cells ; Cell labelling ; Cell viability ; Doxorubicin ; Fe3O4 nanoparticles ; Functionalized ; Hysteresis curve ; In-vitro ; Superparamagnetic property ; Vitro studies ; Magnetite ; Drug carrier ; Nanocomposite ; Chemistry ; Drug delivery system ; Drug release ; Human ; Neoplasm ; Nuclear magnetic resonance imaging ; Drug Carriers ; Drug Delivery Systems ; Drug Liberation ; Humans ; Nanocomposites ; Neoplasms
  8. Source: Langmuir ; Volume 38, Issue 12 , 2022 , Pages 3804-3816 ; 07437463 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/acs.langmuir.1c03458