Lipopeptide nanoparticles for potent and selective siRNA delivery in rodents and nonhuman primates

Yizhou Dong, Kevin T. Love, J. Robert Dorkin, Sasilada Sirirungruang, Yunlong Zhang, Delai Chen, Roman L. Bogorad, Hao Yin, Yi Chen, Arturo J. Vegas, Christopher A. Alabi, Gaurav Sahay, Karsten T. Olejnik, Weiheng Wang, Avi Schroeder, Abigail K R Lytton-Jean, Daniel J. Siegwart, Akin Akinc, Carmen Barnes, Scott A. BarrosMary Carioto, Kevin Fitzgerald, Julia Hettinger, Varun Kumar, Tatiana I. Novobrantseva, June Qin, William Querbes, Victor Koteliansky, Robert Langer, Daniel G. Anderson

Research output: Contribution to journalArticlepeer-review

317 Scopus citations


siRNA therapeutics have promise for the treatment of a wide range of genetic disorders. Motivated by lipoproteins, we report lipopeptide nanoparticles as potent and selective siRNA carriers with a wide therapeutic index. Lead material cKK-E12 showed potent silencing effects in mice (ED50 ̃ 0.002 mg/kg), rats (ED50 < 0.01 mg/kg), and nonhuman primates (over 95% silencing at 0.3 mg/kg). Apolipoprotein E plays a significant role in the potency of cKK-E12 both in vitro and in vivo. cKK-E12 was highly selective toward liver parenchymal cell in vivo, with orders of magnitude lower doses needed to silence in hepatocytes compared with endothelial cells and immune cells in different organs. Toxicity studies showed that cKK-E12 was well tolerated in rats at a dose of 1 mg/kg (over 100-fold higher than the ED50). To our knowledge, this is the most efficacious and selective nonviral siRNA delivery system for gene silencing in hepatocytes reported to date.

Original languageEnglish (US)
Pages (from-to)3955-3960
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number11
StatePublished - Mar 18 2014


  • Lipopeptide nanomaterials
  • Liver genetic disorders
  • Tissue and cell specificity
  • Translational research

ASJC Scopus subject areas

  • General


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