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Ultra-small nanomedicines which stably deliver oligonucleotides to refractory cancers


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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.
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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-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. ....

Kanjiro Miyata , Mami Satake , Kazunori Kataoka , Makoto Shimazaki , King Skyfront , Department Of Material Engineering , Nature Communications , Innovation Network For Smart Health , Innovation Center , Innovation Program , Technology Agency , School Of Engineering , University Of Tokyo , Public Interest Incorporated Foundation , Research Promotion Office Person , Ministry Of Education , Controlled Release , Director General , Unit Polyion Complex , Material Engineering , Graduate School , Kawasaki City , Japan Science , Open Innovation Network , Smart Health , Promotion Office ,