Evidence map›Paper›PMID 19252972›Full record

ReviewJournal of mammary gland biology and neoplasia2009

Resistance to endocrine therapy: are breast cancer stem cells the culprits?

Ciara S O'Brien, Sacha J Howell, Gillian Farnie, Robert B Clarke

Abstract readReview
PubMed Publisher
In one paragraph

Review in Journal of mammary gland biology and neoplasia, 2009. 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
3.8field-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, 67 citations in OpenAlex.

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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

4 authors at 2 institutions in 1 country.

Ciara S O'BrienBreast Biology Group, School of Cancer and Imaging Sciences, Paterson Institute for Cancer Research, University of Manchester, Manchester, UK.
Sacha J Howell
Gillian Farnie
Robert B Clarke
Cancer Research UK Manchester Institute · GBUniversity of Manchester · GB

Funding

Breast Cancer Now 2006MAYSF01
6 · The paper itself

Abstract

From a developmental point of view, tumors can be seen as aberrant versions of their tissue of origin. For example, tumors often partially retain differentiation markers of their tissue of origin and there is evidence that they contain cancer stem cells (CSCs) that drive tumorigenesis. In this review, we summarise current evidence that breast CSCs may partly explain endocrine resistance in breast cancer. In normal breast, the stem cells are known to possess a basal phenotype and to be mainly ERalpha-. If the hierarchy in breast cancer reflects this, the breast CSC may be endocrine resistant because it expresses very little ERalpha and can only respond to treatment by virtue of paracrine influences of neighboring, differentiated ERalpha+ tumor cells. Normal breast epithelial stem cells are highly dependent on the EGFR and other growth factor receptors and it may be that the observed increased growth factor receptor expression in endocrine-resistant breast cancers reflects an increased proportion of CSCs selected by endocrine therapies. There is evidence from a number of studies that breast CSCs are ERalpha- and EGFR+/HER2+, which would support this view. CSCs also express mesenchymal genes which are suppressed by ERalpha expression, further indicating the mutual exclusion between ERalpha+ cells and the CSCs. As we learn more about CSCs, differentiation and the expression and functional activity of the ERalpha in these cells in diverse breast tumor sub-types, it is hoped that our understanding will lead to new modalities to overcome the problem of endocrine resistance in the clinic.

Indexed as

AnimalsBreast NeoplasmsDrug Resistance, NeoplasmEndocrine SystemEpigenesis, GeneticEstrogen Receptor alphaHumansNeoplastic Stem CellsEstrogen Receptor alpha

Identifiers

PMID19252972
OpenAlexW2095510030

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.