Lipid Nanoparticle Delivery Systems for siRNA-Based Therapeutics


Authors: C. Wan, T.M. Allen and P.R. Cullis

Journal: Drug Delivery and Translational Research

DOI: 10.1007/s13346-013-0161-z

Publication - Abstract

February 19, 2014

Abstract:

Therapeutics based on small interfering RNA (siRNA) have a huge potential for the treatment of disease but requires sophisticated delivery systems for in vivo applications. Lipid nanoparticles (LNP) are proven delivery systems for conventional small molecule drugs with over eight approved LNP drugs. Experience gained in the clinical development of LNP for the delivery of small molecules, combined with an understanding of the physical properties of lipids, can be applied to design LNP systems for in vivo delivery of siRNA. In particular, cationic lipids are required to achieve efficient encapsulation of oligonucleotides; however, the presence of a charge on LNP systems can result in toxic side effects and rapid clearance from the circulation. To address these problems, we have developed ionizable cationic lipids with pKa values below 7 that allow oligonucleotide encapsulation at low pH (e.g., pH 4) and a relatively neutral surface at physiological pH. Further optimization of cationic lipids to achieve maximized endosomal destabilization following uptake has resulted in LNP siRNA systems that can silence genes in hepatocytes at doses as low as 0.005 mg siRNA/kg body weight in mouse models. These systems have been shown to be highly effective clinically, with promising results for the treatment of hypercholesterolemia and transthyretin-induced amyloidosis among others. More LNP siRNA therapeutics, targeting different tissues and diseases, are expected to become available in the near future.

Advanced Search

close
  • Publications
  • Application Notes
  • Posters
  • Workshops
  • Videos & Webinars
  • Articles
Search

Browse by Category

  • Application
    • Diagnostic and Imaging
    • Genetic Medicine
    • Hematology
    • Metabolic Disorders
    • Neuroscience
    • Oncology
    • Skeletal Disorders
    • Targeted Drug Delivery
    • Vaccines
    • Other Applications
    • Cell therapy
  • Formulation
    • Liposomes
    • Nucleic Acid Lipid Nanoparticles
    • Polymeric Nanoparticles
    • Other Formulations
  • Payload
    • DNA
    • microRNA
    • mRNA
    • siRNA
    • Small Molecule Drugs
    • Other Payloads


related content

Publication - Summary

Effective Lipidoid Nanoparticle Delivery In Vivo of siRNA Targeting Kappa Light Chain Production in a Murine Xenograft Model

X. Ma, P. Zhou, A. Kugelmass, D. Toskic, M. Warner, L.X. Lee, T. Fogaren, M. Wang, Y. Li, L. Yang, Q. Xu and R. Comenzo

Researchers at Tufts University have recently reported a proof of concept for siRNA-LNP treatment for AL amyloidosis - a bone marrow disorder where Immunoglobulin (Ig) light chains (LC) misfold into amyloids that deposit in a variety of other tissues where they cause disfunction ...
Read More


Publication - Abstract

The ability to control chemical functionality is an exciting feature of modern polymer science that enables precise design of drug delivery systems. Ring-opening polymerization of functional monomers has emerged as a versatile method to prepare clinically translatable degradable ...
Read More


Sign Up and Stay Informed
Sign up today to automatically receive new Cytiva, formerly Precision NanoSystems application notes, conference posters, relevant science publications, and webinar invites.