Cited by 693RNA Interference and Gene DeliveryNanoparticle-Based Drug DeliveryCellular transport and secretion

Visualizing lipid-formulated siRNA release from endosomes and target gene knockdown

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Wittrup, Anders, Ai, Angela, Liu, Xing, Hamar, Peter, Trifonova, Radiana, Charisse, Klaus, Manoharan, Muthiah, Kirchhausen, Tomas +1 more·2015·Nature Biotechnology

Abstract

A central hurdle in developing small interfering RNAs (siRNAs) as therapeutics is the inefficiency of their delivery across the plasma and endosomal membranes to the cytosol, where they interact with the RNA interference machinery. With the aim of improving endosomal release, a poorly understood and inefficient process, we studied the uptake and cytosolic release of siRNAs, formulated in lipoplexes or lipid nanoparticles, by live-cell imaging and correlated it with knockdown of a target GFP reporter. siRNA release occurred invariably from maturing endosomes within ~5-15 min of endocytosis. Cytosolic galectins immediately recognized the damaged endosome and targeted it for autophagy. However, inhibiting autophagy did not enhance cytosolic siRNA release. Gene knockdown occurred within a few hours of release and required <2,000 copies of cytosolic siRNAs. The ability to detect cytosolic release of siRNAs and understand how it is regulated will facilitate the development of rational strategies for improving the cytosolic delivery of candidate drugs.

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  1. [14]Mu FT EEA1 is a conserved α-helical peripheral membrane protein flanked by cysteine “fingers” and contains a calmodulin-binding IQ motif J. Biol. Chem 1995 270 13503 13511 7768953

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Authors
Wittrup, A., Ai, A., Liu, X., Hamar, P., Trifonova, R., Charisse, K., Manoharan, M., Kirchhausen, T., & Lieberman, J.
Affiliations
  • Boston Children's Hospital (US)
  • Alnylam Pharmaceuticals (United States) (US)
Corresponding author
  • Wittrup, Anders
  • Lieberman, Judy
Venue
Nature Biotechnology
Published
2015-07-20
Volume
33
Issue
8
Pages
870-876
ISSN
  • 0733-222X (ISSN-L)
  • 1087-0156
  • 1546-1696
OpenAlex
W1844274376
Cited by
693
References
30
Citations by year
2026: 101 · 2025: 104 · 2024: 82 · 2023: 60 · 2022: 59 · 2021: 63 · 2020: 53 · 2019: 40 · 2018: 54 · 2017: 37 · 2016: 31 · 2015: 8
FWCI
18.70
Type
journal article
Language
en
Open access
Locations
  • Nature Biotechnology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (R01CA139444, CA139444)
  • National Institute of General Medical Sciences (GM075252, R01GM075252)
  • National Institute of Allergy and Infectious Diseases (AI090671, AI057159, R01AI090671, U54AI057159)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
Keywords
siRNA delivery, endosomal escape, lipoplexes, lipid nanoparticles, endocytosis, autophagy, galectins, gene knockdown, live-cell imaging, RNA interference, siRNA therapeutics
MeSH terms
HeLa Cells, Humans, Lipids, Luminescent Proteins, Endosomes, RNA Interference, RNA, Small Interfering, Nanoparticles, Gene Knockdown Techniques

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