Off-resonance plasmonic enhanced femtosecond laser optoporation and transfection of cancer cells.

A femtosecond laser based transfection method using off-resonance plasmonic gold nanoparticles is described. For human cancer melanoma cells, the treatment leads to a very high perforation rate of 70%, transfection efficiency three times higher than for conventional lipofection, and very low toxicity (<1%). Off-resonance laser excitation inhibited the fracture of the nanoparticles into possibly toxic DNA intercalating particles. This efficient and low toxicity method is a promising alternative to viral transfection for skin cancer treatment.

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