Abstract
Curcumin has the propensity to inhibit cancer growth, slow cancer development, increase chemotherapy effectiveness, and shield healthy cells from radiation treatment harm. As a result of curcumin's ability to block several signaling pathways, cervical cancer cells can once again proliferate normally. To optimize topically applied curcumin-loaded solid lipid nanoparticles (SLNPs) for the treatment of cervical cancer, this study set out to establish the relationship between design variables and experimental data. It also performed in vitro characterizations to determine the formulation's efficacy and safety. Curcumin-loaded SLNPs were constructed and optimized using a systematic design of experiment (DoE) technique. SLNPs that were loaded with curcumin were produced utilizing a cold emulsification ultrasonication process. Using the Box Behnken Design, it was determined how independent variables (factors) like the quantity of lipid (A), the quantity of phospholipid (B), and the concentration of surfactant (C) affected the responses of the dependent variables (responses), such as particle size (Y1), polydispersity index (PDI) (Y2), and entrapment efficiency (EE) (Y3) (BBD). The ideal formulation (SLN9) was chosen using the desirability technique based on 3-D surface response graphs. Using polynomial equations and three-dimensional surface plots, the influence of independent factors on the dependent variables was evaluated. The observed responses were almost equal to the levels that the optimal formulation expected. The improved SLNP gel's shape and other physicochemical characteristics were also assessed, and they were determined to be ideal. The sustained release profile of the produced formulations was validated by in vitro release tests. Studies on hemolysis, immunogenic response, and in vitro cell cytotoxicity demonstrate the efficacy and safety of the formulations. To improve the treatment effect, chitosan-coated SLNPs may carry encapsulated curcumin to the desired location and facilitate its localization and deposition in the desired vaginal tissue.
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