In vivo rendezvous of small nucleic acid drugs with charge-matched block catiomers to target cancers

Nat Commun. 2019 Apr 24;10(1):1894. doi: 10.1038/s41467-019-09856-w.

Abstract

Stabilisation of fragile oligonucleotides, typically small interfering RNA (siRNA), is one of the most critical issues for oligonucleotide therapeutics. Many previous studies encapsulated oligonucleotides into ~100-nm nanoparticles. However, such nanoparticles inevitably accumulate in liver and spleen. Further, some intractable cancers, e.g., tumours in pancreas and brain, have inherent barrier characteristics preventing the penetration of such nanoparticles into tumour microenvironments. Herein, we report an alternative approach to cancer-targeted oligonucleotide delivery using a Y-shaped block catiomer (YBC) with precisely regulated chain length. Notably, the number of positive charges in YBC is adjusted to match that of negative charges in each oligonucleotide strand (i.e., 20). The YBC rendezvouses with a single oligonucleotide in the bloodstream to generate a dynamic ion-pair, termed unit polyion complex (uPIC). Owing to both significant longevity in the bloodstream and appreciably small size (~18 nm), the uPIC efficiently delivers oligonucleotides into pancreatic tumour and brain tumour models, exerting significant antitumour activity.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antineoplastic Agents / chemical synthesis
  • Antineoplastic Agents / metabolism*
  • Antineoplastic Agents / pharmacokinetics
  • Brain Neoplasms / genetics
  • Brain Neoplasms / metabolism
  • Brain Neoplasms / mortality
  • Brain Neoplasms / therapy*
  • Carbocyanines / chemistry
  • Cell Cycle Proteins / antagonists & inhibitors
  • Cell Cycle Proteins / genetics
  • Cell Cycle Proteins / metabolism
  • Cell Line, Tumor
  • Drug Carriers / chemical synthesis
  • Drug Carriers / pharmacokinetics
  • Fluorescent Dyes / chemistry
  • Gene Expression Regulation, Neoplastic*
  • Humans
  • Injections, Intravenous
  • Male
  • Mice
  • Nanostructures / administration & dosage
  • Nanostructures / chemistry*
  • Oligonucleotides / chemical synthesis
  • Oligonucleotides / genetics*
  • Oligonucleotides / metabolism
  • Oligonucleotides / pharmacokinetics
  • Pancreatic Neoplasms / genetics
  • Pancreatic Neoplasms / metabolism
  • Pancreatic Neoplasms / mortality
  • Pancreatic Neoplasms / therapy*
  • Polo-Like Kinase 1
  • Polyethylene Glycols / chemistry
  • Polylysine / chemistry
  • Protein Serine-Threonine Kinases / antagonists & inhibitors
  • Protein Serine-Threonine Kinases / genetics
  • Protein Serine-Threonine Kinases / metabolism
  • Proto-Oncogene Proteins / antagonists & inhibitors
  • Proto-Oncogene Proteins / genetics
  • Proto-Oncogene Proteins / metabolism
  • RNA, Long Noncoding / antagonists & inhibitors
  • RNA, Long Noncoding / genetics
  • RNA, Long Noncoding / metabolism
  • RNA, Small Interfering / chemical synthesis
  • RNA, Small Interfering / genetics*
  • RNA, Small Interfering / metabolism
  • RNA, Small Interfering / pharmacokinetics
  • Static Electricity
  • Survival Analysis
  • Xenograft Model Antitumor Assays

Substances

  • Alexa Fluor 647
  • Antineoplastic Agents
  • Carbocyanines
  • Cell Cycle Proteins
  • Drug Carriers
  • Fluorescent Dyes
  • Oligonucleotides
  • Proto-Oncogene Proteins
  • RNA, Long Noncoding
  • RNA, Small Interfering
  • TUG1 long noncoding RNA, human
  • Polylysine
  • Polyethylene Glycols
  • Protein Serine-Threonine Kinases