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Cannabidiol has become in a potential anticancer agent. Nevertheless, it has not been evaluated in ovarian cancer, one of the most aggressive tumors in women. In this work, the potential use of cannabidiol in solution and encapsulated into polymeric nanoparticles coated with folic acid was evaluated for the first time for the treatment of ovarian cancer. Ovarian tumors over-express folic acid receptors and folic-acid-coated nanoformulations trend to be selectively accumulated at tumor site. Cannabidiol in solution administered as monotherapy inhibits the proliferation and migration of SKOV-3 cells. In combination therapy, it significantly increases the antitumor efficacy of paclitaxel, showing a sensitizer and synergistic effect. In ovo, the previous administration of cannabidiol in solution followed by its co-administration with paclitaxel, shows a significantly higher inhibitory effect on ovarian tumor growth than single paclitaxel. The developed nanoparticles are efficiently uptaken by SKOV-3 cells, showing folic acid coated formulations a faster internalization. Although coated formulations do not exhibit a higher in vitro antiproliferative effect compared to cannabidiol in solution or non-coated formulations, in ovo its antitumoral efficacy is significantly higher. This indicates thatfolic acid-coated nanoparticles represent a good strategy to target cannabidiol to ovarian tumors. Finally, cannabidiol-loaded nanoparticles improve the in vitro antiproliferative effect of paclitaxel, showing folic acid-coated-formulations a better efficacy than cannabidiol in solution.

CANNABINOID BASED CHEMO-NANOTHERAPY FOR THE TREATMENT OF GYNECOLOGICAL MALIGNANCIES