Ultrasound-Responsive Nrf2-Targeting siRNA-Loaded Nanobubbles for Enhancing the Treatment of Melanoma.
Monica ArgenzianoFederica BessoneChiara DianzaniMarie Angèle CucciMargherita GrattarolaStefania PizzimentiRoberta CavalliPublished in: Pharmaceutics (2022)
The siRNA-mediated inhibition of nuclear factor E2-related factor 2 (Nrf2) can be an attractive approach to overcome chemoresistance in various malignant tumors, including melanoma. This work aims at designing a new type of chitosan-shelled nanobubble for the delivery of siRNA against Nrf2 in combination with an ultrasound. A new preparation method based on a water-oil-water (W/O/W) double-emulsion was purposely developed for siRNA encapsulation in aqueous droplets within a nanobubble core. Stable, very small NB formulations were obtained, with sizes of about 100 nm and a positive surface charge. siRNA was efficiently loaded in NBs, reaching an encapsulation efficiency of about 90%. siNrf2-NBs downregulated the target gene in M14 cells, sensitizing the resistant melanoma cells to the cisplatin treatment. The combination with US favored NB cell uptake and transfection efficiency. Based on the results, nanobubbles have shown to be a promising US responsive tool for siRNA delivery, able to overcome chemoresistance in melanoma cancer cells.
Keyphrases
- cancer therapy
- drug delivery
- nuclear factor
- oxidative stress
- magnetic resonance imaging
- hyaluronic acid
- toll like receptor
- induced apoptosis
- photodynamic therapy
- stem cells
- computed tomography
- cell therapy
- genome wide
- wound healing
- immune response
- signaling pathway
- skin cancer
- ultrasound guided
- mesenchymal stem cells
- inflammatory response
- endoplasmic reticulum stress
- basal cell carcinoma
- liquid chromatography
- molecularly imprinted
- contrast enhanced ultrasound