Evidence map›Paper›PMID 11826021›Full record

ArticleJournal of medical genetics2002

High frequency of skewed X inactivation in young breast cancer patients.

M Kristiansen, A Langerød, G P Knudsen, B L Weber, A L Børresen-Dale, K H Orstavik

Open access · bronzeAbstract read
In one paragraph

Article in Journal of medical genetics, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

28 citing papers in PubMed, 93 citations in OpenAlex.

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  10. The human sex ratio from conception to birth.Proceedings of the National Academy of Sciences of the United States of America · 2015
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  19. A skewed view of X chromosome inactivation.The Journal of clinical investigation · 2008
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  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

6 authors at 4 institutions in 2 countries.

M KristiansenInstitute of Medical Genetics, University of Oslo, Oslo, Norway.
A Langerød
G P Knudsen
B L Weber
A L Børresen-Dale
K H Orstavik
Norwegian Cancer Society · NOOslo University Hospital · NOUniversity of Oslo · NOUniversity of Pennsylvania · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionPatients with invasive ovarian cancer were recently shown to have a higher frequency of skewed X chromosome inactivation in peripheral blood cells compared to patients with borderline cancer and controls. In this study, we analysed the X inactivation pattern in peripheral blood from 216 breast cancer patients.

methodsX inactivation analysis was performed using HpaII predigestion of DNA followed by PCR of the highly polymorphic CAG repeat of the androgen receptor gene (AR), which amplifies the undigested inactive X chromosome only. The X inactivation pattern was classified as skewed when 90% or more of the cells preferentially used one X chromosome.

resultsYoung breast cancer patients (27-45 years) had a higher frequency of skewed X inactivation than young controls (13 and 1%, respectively) (p=0.009), whereas no difference was found for middle aged and older patients compared to controls of a similar age.

conclusionsA germline mutation in an X linked tumour suppressor gene may give a proliferative advantage to cells with this mutation on the active X chromosome, thus causing skewed X inactivation and an increased risk for developing cancer. Another possible explanation could be that females with a constitutionally skewed X inactivation pattern are more susceptible to develop breast cancer because of an X linked low penetrance susceptibility allele that is affected by the inactivation pattern.

Indexed as

Dosage Compensation, GeneticAdultAgedAged, 80 and overAge FactorsBreast NeoplasmsFemaleHumansMiddle AgedTrinucleotide RepeatsX Chromosome

Identifiers

PMID11826021
PMCPMC1734952
OpenAlexW2068862319

What OpenQuestion holds

Textmetadata
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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.