Evidence map›Paper›PMID 20445538›Full record

ArticleNature2010

Progesterone induces adult mammary stem cell expansion.

Purna A Joshi, Hartland W Jackson, Alexander G Beristain, Marco A Di Grappa, Patricia A Mote, Christine L Clarke, John Stingl, Paul D Waterhouse, Rama Khokha

Abstract read
PubMed Publisher
In one paragraph

Article in Nature, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 381 papers.

0numbers the graph read from it
0cells of the map it votes in
381citing papers in PubMed
31.8field-weighted citation impact, top 1% 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

381 citing papers in PubMed, 688 citations in OpenAlex.

  1. Trial
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  10. Growth hormone regulates the stem cell population in the growth plate.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  11. Article
  12. Article
  13. UTERINE FIBROIDS.Physiological reviews · 2025
    Review
  14. Article
  15. CXCR4Nature communications · 2025
    Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Review

321 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 5 institutions in 3 countries.

Purna A JoshiOntario Cancer Institute, Department of Medical Biophysics and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto M5G 2M9, Ontario, Canada.
Hartland W Jackson
Alexander G Beristain
Marco A Di Grappa
Patricia A Mote
Christine L Clarke
John Stingl
Paul D Waterhouse
Rama Khokha
Ontario Institute for Cancer Research · CACancer Research UK · GBUniversity of Sydney · AUUniversity of Toronto · CAWestmead Institute · AU

Funding

Medical Research Council G0800784
6 · The paper itself

Abstract

Reproductive history is the strongest risk factor for breast cancer after age, genetics and breast density. Increased breast cancer risk is entwined with a greater number of ovarian hormone-dependent reproductive cycles, yet the basis for this predisposition is unknown. Mammary stem cells (MaSCs) are located within a specialized niche in the basal epithelial compartment that is under local and systemic regulation. The emerging role of MaSCs in cancer initiation warrants the study of ovarian hormones in MaSC homeostasis. Here we show that the MaSC pool increases 14-fold during maximal progesterone levels at the luteal dioestrus phase of the mouse. Stem-cell-enriched CD49fhi cells amplify at dioestrus, or with exogenous progesterone, demonstrating a key role for progesterone in propelling this expansion. In aged mice, CD49fhi cells display stasis upon cessation of the reproductive cycle. Progesterone drives a series of events where luminal cells probably provide Wnt4 and RANKL signals to basal cells which in turn respond by upregulating their cognate receptors, transcriptional targets and cell cycle markers. Our findings uncover a dynamic role for progesterone in activating adult MaSCs within the mammary stem cell niche during the reproductive cycle, where MaSCs are putative targets for cell transformation events leading to breast cancer.

Indexed as

AgingAnimalsCell CountCell DivisionCell Transformation, NeoplasticEstrogensEstrous CycleFemaleHomeostasisIntegrin alpha6Mammary Glands, AnimalMiceOvariectomyParacrine CommunicationProgesteroneRANK LigandEstrogensIntegrin alpha6ProgesteroneRANK LigandReceptors, EstrogenReceptors, ProgesteroneTnfsf11 protein, mouseWnt4 ProteinWnt4 protein, mouseWnt Proteins

Identifiers

PMID20445538
OpenAlexW1984433201

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.