Objective To analyze the stability of a siRNA delivery system in solution and evaluate its gene silencing effect. Methods Chitosan(CHS)-Hyaluronic acid(HA)-siRNA multilayer films were prepared through layer-by-layer self-assembly(LBL). Both the construction and the disassembly process of siRNA-loaded films were verified by UV-vis spectroscopy. Additionally, the biological gene silencing effect of the siRNA delivery system in eGFP-HEK 293 T cells was evaluated via flow cytometry and Olympus fluorescence imag...