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Researchers develop ultra-small nanomedicines to target intractable cancers Ultra-small nanomedicines of approximately 18 nm were fabricated by dynamic ion-pairing between Y-shaped block copolymers and nucleic acid drugs, such as siRNA and antisense drugs. Chemically modified and double-stranded oligonucleotides dramatically enhanced the stability of the ultra-small nanomedicines in the blood circulation. The ultra-small size allows for high permeability in cancer tissues by slipping through the cracks in tumor vasculatures and stromal tissues. Clinical trials and preclinical studies using th...

Loading video... VIDEO: Nanomedicines consisting of one molecule of oligonucleotide and one or two molecules of Y-shaped block copolymer(s), of which the size is approximately 18 nm and is in dynamic equilibrium with free Y-shaped... view more  Credit: 2021 Innovation Center of NanoMedicine Summary Ultra-small nanomedicines of approximately 18 nm were fabricated by dynamic ion-pairing between Y-shaped block copolymers and nucleic acid drugs, such as siRNA and antisense drugs. Chemically modified and double-stranded oligonucleotides dramatically enhanced the stability of the ultra-smal...