Evidence map›Paper›PMID 24667779›Full record

ArticleEuropean journal of human genetics : EJHG2014

Functional characterization of BRCA1 gene variants by mini-gene splicing assay.

Ane Y Steffensen, Mette Dandanell, Lars Jønson, Bent Ejlertsen, Anne-Marie Gerdes, Finn C Nielsen, Thomas vO Hansen

Abstract read
In one paragraph

Article in European journal of human genetics : EJHG, 2014. 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.

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  12. Silent but Not Harmless: A SynonymousFrontiers in endocrinology · 2022
    Article
  13. Article
  14. Article
  15. Article
  16. Characterization of SynonymousFrontiers in oncology · 2021
    Article
  17. Reclassification ofJournal of gynecologic oncology · 2020
    Article
  18. Article
  19. Article
  20. Six Exonic Variants in theFrontiers in genetics · 2020
    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.

Ane Y SteffensenCenter for Genomic Medicine, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Mette DandanellCenter for Genomic Medicine, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Lars JønsonCenter for Genomic Medicine, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Bent EjlertsenDepartment of Oncology, Rigshospitalet, Copenhagen, Denmark.
Anne-Marie GerdesDepartment of Clinical Genetics, Rigshospitalet, Copenhagen, Denmark.
Finn C NielsenCenter for Genomic Medicine, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Thomas vO HansenCenter for Genomic Medicine, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mutational screening of the breast cancer susceptibility gene BRCA1 leads to the identification of numerous pathogenic variants such as frameshift and nonsense variants, as well as large genomic rearrangements. The screening moreover identifies a large number of variants, for example, missense, silent, and intron variants, which are classified as variants of unknown clinical significance owing to the lack of causal evidence. Variants of unknown clinical significance can potentially have an impact on splicing and therefore functional examinations are warranted to classify whether these variants are pathogenic or benign. Here we validate a mini-gene splicing assay by comparing the results of 24 variants with previously published data from RT-PCR analysis on RNA from blood samples/lymphoblastoid cell lines. The analysis showed an overall concordance of 100%. In addition, we investigated 13 BRCA1 variants of unknown clinical significance or putative variants affecting splicing by in silico analysis and mini-gene splicing assay. Both the in silico analysis and mini-gene splicing assay classified six BRCA1 variants as pathogenic (c.80+1G>A, c.132C>T (p.=), c.213-1G>A, c.670+1delG, c.4185+1G>A, and c.5075-1G>C), whereas six BRCA1 variants were classified as neutral (c.-19-22_-19-21dupAT, c.302-15C>G, c.547+14delG, c.4676-20A>G, c.4987-21G>T, and c.5278-14C>G) and one BRCA1 variant remained unclassified (c.670+16G>A). In conclusion, our study emphasizes that in silico analysis and mini-gene splicing assays are important for the classification of variants, especially if no RNA is available from the patient. This knowledge is crucial for proper genetic counseling of patients and their family members.

Indexed as

Genetic VariationRNA SplicingAnimalsBRCA1 ProteinBRCA2 ProteinBreast NeoplasmsChlorocebus aethiopsCOS CellsExonsFemaleGenetic CounselingGenetic Predisposition to DiseaseGenome, HumanHumansMolecular Sequence DataReproducibility of ResultsBRCA1 ProteinBRCA2 Protein

Identifiers

PMID24667779
PMCPMC4231409

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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.