Progress in the design of gene delivery system is vital for cancer gene therapy since many physiological and intracellular barriers remain. We have developed a technology for condensing genes into nanometric delivery systems. In this paper, we present a novel strategy for decorating 30 nm DNA particles with folic acid for cancer cell recognition. Physicochemical and biological experiments show that these DNA complexes selectively bind to cells expressing the corresponding folic acid receptor.

Key words: DNA condensation; Folic acid; and Gene delivery