Evidence map›Paper›PMID 19770520›Full record

ArticleThe Journal of clinical investigation2009

Expression of human BRCA1 variants in mouse ES cells allows functional analysis of BRCA1 mutations.

Suhwan Chang, Kajal Biswas, Betty K Martin, Stacey Stauffer, Shyam K Sharan

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2009. 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
5.0field-weighted citation impact, top 5% 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

46 citing papers in PubMed, 67 citations in OpenAlex.

  1. Review
  2. Review
  3. BRCA1 the Versatile Defender: Molecular to Environmental Perspectives.International journal of molecular sciences · 2023
    Review
  4. Article
  5. Article
  6. Article
  7. Review
  8. Functional Characterization ofFrontiers in molecular biosciences · 2020
    Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. A Novel Germline Mutation inJournal of breast cancer · 2017
    Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 1 country.

Suhwan ChangMouse Cancer Genetics Program, Center for Cancer Research, National Cancer Institute at Frederick, 1050 Boyles Street, Frederick, MD 21702, USA.
Kajal Biswas
Betty K Martin
Stacey Stauffer
Shyam K Sharan
Cancer Genetics (United States) · USCenter for Cancer Research · USNational Cancer Institute · US

Funding

Functional Evaluation of BRCA2 Variants on TumorigenesisZIABC010387 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI SHARAN, SHYAM · 2009 to 2025
$12.5M
Functional Analysis of Variants Identified in Human Breast Cancer SusceptibilityZIABC011181 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI SHARAN, SHYAM · 2009 to 2025
$11.6M
6 · The paper itself

Abstract

To date, inheritance of a mutant BRCA1 or BRCA2 gene is the best-established indicator of an increased risk of developing breast cancer. Sequence analysis of these genes is being used to identify BRCA1/2 mutation carriers, though these efforts are hampered by the high frequency of variants of unknown clinical significance (VUSs). Functional evaluation of such variants has been restricted due to lack of a physiologically relevant assay. In this study we developed a functional assay using mouse ES cells to study variants of BRCA1. We introduced BAC clones with human wild-type BRCA1 or variants into Brca1-null ES cells and confirmed that only wild-type and a known neutral variant rescued cell lethality. The same neutral variant was also able to rescue embryogenesis in Brca1-null mice. A test of several BRCT domain mutants revealed all to be deleterious, including a VUS. Furthermore, we used this assay to determine the effects of BRCA1 variants on cell cycle regulation, differentiation, and genomic stability. Importantly, we discovered that ES cells rescued by S1497A BRCA1 exhibited significant hypersensitivity after gamma-irradiation. Our results demonstrate that this ES cell-based assay is a powerful and reliable method for analyzing the functional impact of BRCA1 variants, which we believe could be used to determine which patients may require preventative treatments.

Indexed as

BRCA1 ProteinMutationAnimalsBRCA2 ProteinBreast NeoplasmsCell CycleCell DifferentiationDNA DamageDNA RepairEmbryonic Stem CellsFemaleGenetic Predisposition to DiseaseHumansMiceMice, NudeMice, TransgenicBRCA1 ProteinBRCA2 Protein

Identifiers

PMID19770520
PMCPMC2752086
OpenAlexW2019089605

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.