Cited by 572RNA Interference and Gene DeliveryNanoparticle-Based Drug DeliveryLipid Membrane Structure and Behavior

Cationic lipid saturation influences intracellular delivery of encapsulated nucleic acids

Heyes, James, Palmer, Lorne, Bremner, Kaz, MacLachlan, Ian·2005·Journal of Controlled Release

Abstract

An analogous series of cationic lipids (1,2-distearyloxy-N,N-dimethyl-3-aminopropane (DSDMA), 1,2-dioleyloxy-N,N-dimethyl-3-aminopropane (DODMA), 1,2-dilinoleyloxy-N,N-dimethyl-3-aminopropane (DLinDMA) and 1,2-dilinolenyloxy-N,N-dimethyl-3-aminopropane (DLenDMA)) possessing 0, 1, 2 or 3 double bonds per alkyl chain respectively, was synthesized to determine the correlation between lipid saturation, fusogenicity and efficiency of intracellular nucleic acid delivery. 31P-NMR analysis suggests that as saturation increases, from 2 to 0 double bonds, lamellar (L(alpha)) to reversed hexagonal (H(II)) phase transition temperature increases, indicating decreasing fusogenicity. This trend is largely reflected by the efficiency of gene silencing observed in vitro when the lipids are formulated as Stable Nucleic Acid Lipid Particles (SNALPs) encapsulating small inhibitory RNA (siRNA). Uptake experiments suggest that despite their lower gene silencing efficiency, the less fusogenic particles are more readily internalized by cells. Microscopic visualization of fluorescently labelled siRNA uptake was supported by quantitative data acquired using radiolabelled preparations. Since electrostatic binding is a precursor to uptake, the pKa of each cationic lipid was determined. The results support a transfection model in which endosomal release, mediated by fusion with the endosomal membrane, results in cytoplasmic translocation of the nucleic acid payload.

Integrity signals

Registry

Crossref · 10.1016/j.jconrel.2005.06.014

Cites

29 of 29 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The ionizable cationic lipid DLinDMA is highly effective at delivering siRNA systemically in rodents and nonhuman primates.

    “The ionizable cationic lipid 1,2-dilinoleyloxy-3-dimethylaminopropane (DLinDMA) (27), which is highly effective at delivering siRNA systemically in rodents and nonhuman primates, was used as the main component of the lipid nanoparticles.”

    From Nonviral delivery of self-amplifying RNA vaccines (2012) · cites this paper as [27]

  • The delivery efficacy of mRNA could be improved by rational design of lipids through modulation of head groups and hydrophobic tails to increase cellular uptake and endosomal escape of lipid nanoparticle-mRNA formulations.

    “Moreover, the delivery efficacy of mRNA could be improved, for example, by rational design of lipids through modulation of head groups and hydrophobic tails to increase cellular uptake and endosomal escape of lipid nanoparticle–mRNA formulations64,66,76–78,88,97,100,114,140,141.”

    From Lipid nanoparticles for mRNA delivery (2021) · cites this paper as [64]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Heyes, J., Palmer, L., Bremner, K., & MacLachlan, I.
Corresponding author
MacLachlan, Ian
Venue
Journal of Controlled Release
Publisher
Elsevier BV
Published
2005-10
Volume
107
Issue
2
Pages
276-287
ISSN
0168-3659 (ISSN-L)
OpenAlex
W2086919915
Cited by
572
References
29
Citations by year
2026: 27 · 2025: 52 · 2024: 65 · 2023: 51 · 2022: 41 · 2021: 49 · 2020: 23 · 2019: 30 · 2018: 17 · 2017: 29 · 2016: 23 · 2015: 15 · 2014: 23 · 2013: 24 · 2012: 29
FWCI
2.89
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Controlled Release (publishedVersion)
  • PubMed (publishedVersion)
Funders
University of British Columbia
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 › Molecular Biology › Lipid Membrane Structure and Behavior
Keywords
cationic lipids, lipid saturation, siRNA, gene silencing, fusogenicity, lipid phase transition, endosomal escape, endosomal membrane fusion, electrostatic binding, pKa, lipogenesis
MeSH terms
Cations, Cell Line, Chemistry, Pharmaceutical, Drug Compounding, Humans, Lipids, Luciferases, Neurons, Magnetic Resonance Spectroscopy, Toluene, Transfection, Gene Expression, Drug Delivery Systems, Gene Silencing, RNA, Small Interfering

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review