Evidence map›Paper›PMID 22939618›Full record

ArticleCell2012

Single-stranded siRNAs activate RNAi in animals.

Walt F Lima, Thazha P Prakash, Heather M Murray, Garth A Kinberger, Wenyu Li, Alfred E Chappell, Cheryl S Li, Susan F Murray, Hans Gaus, Punit P Seth and 2 more

Abstract read
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In one paragraph

Article in Cell, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 148 papers.

0numbers the graph read from it
0cells of the map it votes in
148citing papers in PubMed
–field-weighted citation impact
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

148 citing papers in PubMed.

  1. Review
  2. Review
  3. Article
  4. Antisense Oligonucleotide Therapeutics Targeting Age-Related Diseases.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2026
    Review
  5. Article
  6. A Novel Method to Silence Genes in Cryptosporidium.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  7. RNA Therapeutics in Heart Failure.Journal of cardiovascular translational research · 2025
    Review
  8. Article
  9. Optimized chemical structure extends silencing duration of therapeutic siRNAs in dividing cancer and immune cells.Molecular therapy : the journal of the American Society of Gene Therapy · 2025
    Article
  10. Article
  11. Article
  12. Review
  13. Review
  14. Review
  15. Article
  16. Article
  17. Chemical Modifications in Nucleic Acid Therapeutics.Methods in molecular biology (Clifton, N.J.) · 2025
    Review
  18. Review
  19. Review
  20. Review

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

12 authors.

Walt F LimaCore Antisense Research, Isis Pharmaceuticals Inc., Carlsbad, CA 92010, USA.
Thazha P Prakash
Heather M Murray
Garth A Kinberger
Wenyu Li
Alfred E Chappell
Cheryl S Li
Susan F Murray
Hans Gaus
Punit P Seth
Eric E Swayze
Stanley T Crooke

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The therapeutic utility of siRNAs is limited by the requirement for complex formulations to deliver them to tissues. If potent single-stranded RNAs could be identified, they would provide a simpler path to pharmacological agents. Here, we describe single-stranded siRNAs (ss-siRNAs) that silence gene expression in animals absent lipid formulation. Effective ss-siRNAs were identified by iterative design by determining structure-activity relationships correlating chemically modified single strands and Argonaute 2 (AGO2) activities, potency in cells, nuclease stability, and pharmacokinetics. We find that the passenger strand is not necessary for potent gene silencing. The guide-strand activity requires AGO2, demonstrating action through the RNAi pathway. ss-siRNA action requires a 5' phosphate to achieve activity in vivo, and we developed a metabolically stable 5'-(E)-vinylphosphonate (5'-VP) with conformation and sterioelectronic properties similar to the natural phosphate. Identification of potent ss-siRNAs offers an additional option for RNAi therapeutics and an alternate perspective on RNAi mechanism.

Indexed as

RNA InterferenceAnimalsArgonaute ProteinsBase SequenceCells, CulturedHeLa CellsHepatocytesHumansLipid MetabolismLiverMaleMiceMice, Inbred BALB CMolecular Sequence DataOrganophosphonatesRNA-Induced Silencing ComplexAGO2 protein, humanArgonaute ProteinsOrganophosphonatesRNA-Induced Silencing ComplexRNA, Small InterferingVinyl Compoundsvinylphosphonic acid

Identifiers

What OpenQuestion holds

Textmetadata
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.