A versatile method for the automated synthesis of composites containing DNA-oligonucleotides and boron cluster scaffolds and their assembly into functional nanoparticles is described. The obtained, torus-like nanoparticles carry antisense oligonucleotides that target two different oncogenes simultaneously. The nanoparticles exhibited notable silencing efficiency in vitro in a pancreatic carcinoma cell line PANC-1 toward EGFR and c-Myc genes at the mRNA level, and a significant efficiency at the protein level. The proposed approach may be an attractive alternative to methods currently used, including one therapeutic nucleic acid, one genetic target, or the use of cocktails of therapeutic nucleic acids.
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