Layer-by-layer siRNA/poly(L-lysine) Multilayers on Polydopamine-coated Surface for Efficient Cell Adhesion and Gene...

Area of Science:

• Biomaterials Science
• Molecular Biology
• Tissue Engineering

Background:

• Small interfering RNA (siRNA) is crucial for controlling cellular functions in tissue engineering.
• Traditional polycationic carriers for siRNA face challenges due to low siRNA association and cytotoxicity.

Purpose of the Study:

• To develop an efficient and less cytotoxic method for siRNA delivery.
• To explore the self-assembly of siRNA with mild polyelectrolytes for gene silencing.

Main Methods:

• Fabrication of siRNA/poly-L-lysine (PLL) multilayers via layer-by-layer deposition on a polydopamine-coated substrate.
• Assessment of gene silencing efficiency in cells cultured on the fabricated multilayers.
• Investigation of the impact of multilayer structure on gene silencing efficacy.

Main Results:

• The siRNA/PLL multilayers effectively inhibited target gene expression in cells.
• Gene silencing efficiency was correlated with the number of siRNA layers in the multilayer.
• This approach offers a promising alternative to conventional siRNA delivery methods, reducing cytotoxicity.

Conclusions:

• Self-assembled siRNA/PLL multilayers provide an efficient platform for surface-mediated gene silencing.
• This technique holds potential for advanced tissue engineering applications requiring controlled gene modulation.