Evidence map›Paper›PMID 22216965›Full record

ArticleBMC genomics2012

Diversity in parasitic nematode genomes: the microRNAs of Brugia pahangi and Haemonchus contortus are largely novel.

Alan D Winter, William Weir, Martin Hunt, Matthew Berriman, John S Gilleard, Eileen Devaney, Collette Britton

Abstract read
In one paragraph

Article in BMC genomics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing 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

46 citing papers in PubMed.

  1. Trial
  2. Article
  3. Current research in parasitology & vector-borne diseases · 2025
    Article
  4. Article
  5. Review
  6. AdvancingPhilosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024
    Review
  7. Article
  8. Differential expression of microRNAs in response toFrontiers in plant science · 2024
    Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Developmental Regulation and Functional Prediction of microRNAs in an ExpandedFrontiers in cellular and infection microbiology · 2022
    Article
  15. Parasite-derived microRNAs as a diagnostic biomarker: potential roles, characteristics, and limitations.Journal of parasitic diseases : official organ of the Indian Society for Parasitology · 2021
    Review
  16. Article
  17. Article
  18. Article
  19. Review
  20. Article
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

7 authors.

Alan D WinterInstitute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences; University of Glasgow, Garscube Estate, Bearsden Road, Glasgow, G61 1QH, UK. Alan.Winter@glasgow.ac.uk
William Weir
Martin Hunt
Matthew Berriman
John S Gilleard
Eileen Devaney
Collette Britton

Funding

Wellcome Trust 085775/Z/08/ZWellcome Trust 086823/Z/08/Z
6 · The paper itself

Abstract

backgroundMicroRNAs (miRNAs) play key roles in regulating post-transcriptional gene expression and are essential for development in the free-living nematode Caenorhabditis elegans and in higher organisms. Whether microRNAs are involved in regulating developmental programs of parasitic nematodes is currently unknown. Here we describe the the miRNA repertoire of two important parasitic nematodes as an essential first step in addressing this question.

resultsThe small RNAs from larval and adult stages of two parasitic species, Brugia pahangi and Haemonchus contortus, were identified using deep-sequencing and bioinformatic approaches. Comparative analysis to known miRNA sequences reveals that the majority of these miRNAs are novel. Some novel miRNAs are abundantly expressed and display developmental regulation, suggesting important functional roles. Despite the lack of conservation in the miRNA repertoire, genomic positioning of certain miRNAs within or close to specific coding genes is remarkably conserved across diverse species, indicating selection for these associations. Endogenous small-interfering RNAs and Piwi-interacting (pi)RNAs, which regulate gene and transposon expression, were also identified. piRNAs are expressed in adult stage H. contortus, supporting a conserved role in germline maintenance in some parasitic nematodes.

conclusionsThis in-depth comparative analysis of nematode miRNAs reveals the high level of divergence across species and identifies novel sequences potentially involved in development. Expression of novel miRNAs may reflect adaptations to different environments and lifestyles. Our findings provide a detailed foundation for further study of the evolution and function of miRNAs within nematodes and for identifying potential targets for intervention.

Indexed as

Genetic VariationAnimalsBrugia pahangiCaenorhabditis elegansCluster AnalysisComputational BiologyGenes, HelminthGenome, HelminthHaemonchusLarvaMicroRNAsRNA, Small InterferingSequence Analysis, RNAMicroRNAsRNA, Small Interfering

Identifiers

PMID22216965
PMCPMC3282659

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Registered trials

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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.