Evidence map›Paper›PMID 21060810›Full record

ArticlePLoS pathogens2010

Retention and loss of RNA interference pathways in trypanosomatid protozoans.

Lon-Fye Lye, Katherine Owens, Huafang Shi, Silvane M F Murta, Ana Carolina Vieira, Salvatore J Turco, Christian Tschudi, Elisabetta Ullu, Stephen M Beverley

Open access · goldAbstract read
In one paragraph

Article in PLoS pathogens, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 136 papers.

0numbers the graph read from it
0cells of the map it votes in
136citing papers in PubMed
11.6field-weighted citation impact, top 1% 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

136 citing papers in PubMed, 232 citations in OpenAlex.

  1. Review
  2. Review
  3. Article
  4. Article
  5. Small RNA Profiling in Trypanosomes.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  6. A Novel Method to Silence Genes in Cryptosporidium.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  7. CRISPR-Cas13b mediated gene knockdowns in Leishmania infantum.International journal for parasitology. Drugs and drug resistance · 2025
    Article
  8. Article
  9. Review
  10. Hybrid reference genome assembly for the archetypalMicrobiology resource announcements · 2025
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Comparative microRNA profiling ofFrontiers in cellular and infection microbiology · 2023
    Article
  17. Article
  18. Review
  19. Article
  20. CRISPR-Cas9: Taming protozoan parasites with bacterial scissor.Journal of parasitic diseases : official organ of the Indian Society for Parasitology · 2022
    Review

76 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

9 authors at 3 institutions in 1 country.

Lon-Fye LyeDepartment of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, United States of America.
Katherine Owens
Huafang Shi
Silvane M F Murta
Ana Carolina Vieira
Salvatore J Turco
Christian Tschudi
Elisabetta Ullu
Stephen M Beverley
Washington University in St. Louis · USYale University · USUniversity of Kentucky · US

Funding

GLYCOSYLATION MUTANTS OF LEISHMANIAR01AI031078 · NIAID · WASHINGTON UNIVERSITY · PI BEVERLEY, STEPHEN M · 1992 to 2019
$11.4M
TRANSCRIPTION AND RNA PROCESSING IN TRYPANOSOMESR01AI028798 · NIAID · YALE UNIVERSITY · PI TSCHUDI, CHRISTIAN · 1990 to 2020
$10.9M
MOLECULAR GENETICS OF LEISHMANIA USING DNA TRANSFECTIONR01AI029646 · NIAID · WASHINGTON UNIVERSITY · PI BEVERLEY, STEPHEN M · 1990 to 2015
$9.3M
SMALL RNAS AND THEIR ROLE IN TRYPANOSOME BIOLOGYR01AI056333 · NIAID · YALE UNIVERSITY · PI ULLU, ELISABETTA · 2003 to 2012
$3.3M
RNA METABOLISM IN TRYPANOSOMESR37AI028798 · NIAID · YALE UNIVERSITY · PI ULLU, ELISABETTA · 2010 to 2013
$2.9M
NIAID NIH HHS AI028798NIAID NIH HHS AI031078NIAID NIH HHS AI29646NIAID NIH HHS AI56333NIAID NIH HHS R01 AI028798NIAID NIH HHS R01 AI029646NIAID NIH HHS R01 AI031078NIAID NIH HHS R01 AI056333NIAID NIH HHS R37 AI028798
6 · The paper itself

Abstract

RNA interference (RNAi) pathways are widespread in metaozoans but the genes required show variable occurrence or activity in eukaryotic microbes, including many pathogens. While some Leishmania lack RNAi activity and Argonaute or Dicer genes, we show that Leishmania braziliensis and other species within the Leishmania subgenus Viannia elaborate active RNAi machinery. Strong attenuation of expression from a variety of reporter and endogenous genes was seen. As expected, RNAi knockdowns of the sole Argonaute gene implicated this protein in RNAi. The potential for functional genetics was established by testing RNAi knockdown lines lacking the paraflagellar rod, a key component of the parasite flagellum. This sets the stage for the systematic manipulation of gene expression through RNAi in these predominantly diploid asexual organisms, and may also allow selective RNAi-based chemotherapy. Functional evolutionary surveys of RNAi genes established that RNAi activity was lost after the separation of the Leishmania subgenus Viannia from the remaining Leishmania species, a divergence associated with profound changes in the parasite infectious cycle and virulence. The genus Leishmania therefore offers an accessible system for testing hypothesis about forces that may select for the loss of RNAi during evolution, such as invasion by viruses, changes in genome plasticity mediated by transposable elements and gene amplification (including those mediating drug resistance), and/or alterations in parasite virulence.

Indexed as

RNA InterferenceEvolution, MolecularGenes, ProtozoanGenetic SpeciationGenomic InstabilityLeishmania braziliensisPhenotypePhylogenyRNA-Binding ProteinsRNA, Small InterferingSignal TransductionTrypanosomatinaVirusesRNA-Binding ProteinsRNA, Small Interfering

Identifiers

PMID21060810
PMCPMC2965760
OpenAlexW2119799023

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.