Marinho, Jéssica Pauline NunesNeme, Natália PazMatos, Matheus Josué de SouzaBatista, Ronaldo Junio CamposMacedo, Waldemar Augusto de AlmeidaGastelois, Pedro LanaGomes, Dawidson AssisRodrigues, Michele AngelaCipreste, Marcelo FernandesSousa, Edésia Martins Barros de2023-08-172023-08-172023MARINHO, J. P. N. et al. Nanostructured system based on hydroxyapatite and curcumin: a promising candidate for osteosarcoma therapy. Ceramics International, v. 49, n. 12, p. 19932–19949, 2023. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0272884223006995>. Acesso em: 06 jul. 2023.0272-8842http://www.repositorio.ufop.br/jspui/handle/123456789/17249Osteosarcoma is the most common type of bone cancer. Despite therapeutic progress, survival rates for meta- static cases or that do not respond well to chemotherapy remain in the 30% range. In this sense, the use of nanotechnology to develop targeted and more effective therapies is a promising tool in the fight against cancer. Nanostructured hydroxyapatite, due to its biocompatibility and the wide possibility of functionalization, is an interesting material to design nanoplatforms for targeted drug delivery. These platforms have the potential to enable the use of natural substances in the fight against cancer, such as curcumin. Curcumin is a polyphenol with promising properties in treating various types of cancer, including osteosarcoma. In this work, hydroxyapatite (n- HA) nanorods synthesized by the hydrothermal method were investigated as a carrier for curcumin. For this, first-principle calculations based on the Density Functional Theory (DFT) were performed, in which the modi- fication of curcumin (CM) with the coupling agent (3-aminopropyl) triethoxysilane (APTES) was theoretically evaluated. Curcumin was incorporated in n-HA and the drug loading stability was evaluated by leaching test. Samples were characterized by a multi-techniques approach, including Fourier transform infrared spectroscopy (FTIR), UV–visible spectroscopy (UV–Vis), X-ray diffraction (XRD), X-ray fluorescence spectrometry (FRX), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), zeta potential analysis (ζ), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The results show that n-HAs with a 90 nm average size were obtained and successful incorporation of curcumin in the nanostructure was achieved. Cell viability and the number of osteosarcoma cells were decreased by CMAP-HA treatment. Furthermore, the stability test suggests that hydroxyapatite nanoparticles present great potential for the trans- portation of curcumin in the bloodstream, crediting this system for biological performance evaluations aiming at the treatment of osteosarcomas. Keywords: nanostructures, curcumin, hydroxyapatite, osteosarcoma.en-USrestritoArtigo publicado em periodicohttps://www.sciencedirect.com/science/article/pii/S0272884223006995https://doi.org/10.1016/j.ceramint.2023.03.115