Evidence map›Paper›PMID 28848235›Full record

ArticleScientific reports2017

Analysis of the miR-34 family functions in breast cancer reveals annotation error of miR-34b.

M E Engkvist, E W Stratford, S Lorenz, L A Meza-Zepeda, O Myklebost, E Munthe

Abstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing 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

16 citing papers in PubMed.

  1. Review
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  5. Article
  6. Deciphering the role of microRNAs in mustard gas-induced toxicity.Annals of the New York Academy of Sciences · 2021
    Review
  7. Article
  8. Article
  9. Article
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  11. Review
  12. Article
  13. Article
  14. MicroRNA-34 family: a potential tumor suppressor and therapeutic candidate in cancer.Journal of experimental & clinical cancer research : CR · 2019
    Review
  15. Article
  16. Cell Cycle Regulation of Stem Cells by MicroRNAs.Stem cell reviews and reports · 2018
    Review
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

6 authors.

M E EngkvistDepartment of Tumour Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.
E W StratfordDepartment of Tumour Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.
S LorenzDepartment of Tumour Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.
L A Meza-ZepedaDepartment of Tumour Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.
O MyklebostDepartment of Tumour Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway. ola.myklebost@uib.no.
E MuntheDepartment of Tumour Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway. else.munthe@rr-research.no.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The microRNAs in the miR-34 family, consisting of miR-34a, miR-34b and miR-34c, are tumour suppressors. The annotated human miR-34b-5p has one additional base at the 5' end of the common miR-34 family seed sequence, compared to miR-34a-5p and miR-34c-5p. This extra base results in a shift of the seed sequence, which would affect the target gene repertoire and have functional consequences. During our studies of miR-34 functions, we investigated the precise sequence of mature miR-34b-5p in human cells by deep sequencing. We found that a miR-34b-5p without the extra base was the predominant form in both non-malignant and malignant cells derived from several human tissues, indicating that the miR-34b annotation is misleading. We evaluated the functional implications of the seed shift, by comparing the effect of mimics representing the alternative miR-34b-5p sequences in MDA-MB-231 cells. In contrast to the annotated miR-34b, the endogenously expressed miR-34b displayed tumour suppressive characteristics in vitro similarly to miR-34c. These data demonstrate the importance of determining the precise sequence of a mature microRNA before exploring miRNA functions.

Indexed as

Computational BiologyGene Expression Regulation, NeoplasticMolecular Sequence AnnotationMultigene FamilyBase SequenceBreast NeoplasmsCell Line, TumorConserved SequenceFemaleHumansMicroRNAsMicroRNAsMIRN34 microRNA, human

Identifiers

PMID28848235
PMCPMC5573726

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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.