Evidence map›Paper›PMID 30927008›Full record

ArticleNucleic acids research2019

Differential uptake, kinetics and mechanisms of intracellular trafficking of next-generation antisense oligonucleotides across human cancer cell lines.

Emily Linnane, Paul Davey, Pei Zhang, Sanyogitta Puri, Mark Edbrooke, Elisabetta Chiarparin, Alexey S Revenko, A Robert Macleod, Jim C Norman, Sarah J Ross

Open access · goldAbstract read
In one paragraph

Article in Nucleic acids research, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 71 papers.

0numbers the graph read from it
0cells of the map it votes in
71citing papers in PubMed
4.5field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

71 citing papers in PubMed, 96 citations in OpenAlex.

  1. RNA therapeutics: current status and future directions.Signal transduction and targeted therapy · 2026
    Review
  2. Article
  3. Review
  4. The Versatile Applications of Antisense Oligonucleotides in Modern Medicine.International journal of molecular sciences · 2026
    Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Review
  19. Investigational RNA Interference Agents for Hepatitis B.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2025
    Review
  20. Review

11 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 3 institutions in 2 countries.

Emily LinnaneBioscience, Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, CB10 1XL, UK.
Paul DaveyChemistry, Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, CB4 0WG, UK.
Pei ZhangBioscience, Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, CB10 1XL, UK.
Sanyogitta PuriAdvanced Drug Delivery, Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca, Cambridge, CB21 6GH, UK.
Mark EdbrookeBioscience, Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, CB10 1XL, UK.
Elisabetta ChiarparinChemistry, Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, CB4 0WG, UK.
Alexey S RevenkoIonis Pharmaceuticals, Carlsbad, CA 92010, USA.
A Robert MacleodIonis Pharmaceuticals, Carlsbad, CA 92010, USA.
Jim C NormanCancer Research UK Beatson Institute, Glasgow, G61 1BD, UK.
Sarah J RossBioscience, Oncology, IMED Biotech Unit, AstraZeneca, Cambridge, CB10 1XL, UK.
AstraZeneca (United Kingdom) · GBIonis Pharmaceuticals (United States) · USCancer Research UK Scotland Institute · GB

Funding

Cancer Research UK 18277Cancer Research UK 28291Medical Research Council MR/P01058X/1
6 · The paper itself

Abstract

Antisense oligonucleotides (ASOs) modulate cellular target gene expression through direct binding to complementary RNA. Advances in ASO chemistry have led to the development of phosphorothioate (PS) ASOs with constrained-ethyl modifications (cEt). These next-generation cEt-ASOs can enter cells without transfection reagents. Factors involved in intracellular uptake and trafficking of cEt-ASOs leading to successful target knockdown are highly complex and not yet fully understood. AZD4785 is a potent and selective therapeutic KRAS cEt-ASO currently under clinical development for the treatment of cancer. Therefore, we used this to investigate mechanisms of cEt-ASO trafficking across a panel of cancer cells. We found that the extent of ASO-mediated KRAS mRNA knockdown varied significantly between cells and that this did not correlate with bulk levels of intracellular accumulation. We showed that in cells with good productive uptake, distribution of ASO was perinuclear and in those with poor productive uptake distribution was peripheral. Furthermore, ASO rapidly trafficked to the late endosome/lysosome in poor productive uptake cells compared to those with more robust knockdown. An siRNA screen identified several factors mechanistically involved in productive ASO uptake, including the endosomal GTPase Rab5C. This work provides novel insights into the trafficking of cEt-ASOs and mechanisms that may determine their cellular fate.

Indexed as

EndosomesGene Expression Regulation, NeoplasticGene Knockdown TechniquesHT29 CellsHumansNeoplasmsOligonucleotides, AntisensePhosphorothioate OligonucleotidesProto-Oncogene Proteins p21(ras)rab5 GTP-Binding ProteinsRNA, MessengerRNA, Small InterferingKRAS protein, humanOligonucleotides, AntisensePhosphorothioate OligonucleotidesProto-Oncogene Proteins p21(ras)RAB5C protein, humanrab5 GTP-Binding ProteinsRNA, MessengerRNA, Small Interfering

Identifiers

PMID30927008
PMCPMC6511877
OpenAlexW2930517794

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.