Publication Date:
2015-07-15
Description:
Progesterone receptor (PR) expression is used as a biomarker of oestrogen receptor-alpha (ERalpha) function and breast cancer prognosis. Here we show that PR is not merely an ERalpha-induced gene target, but is also an ERalpha-associated protein that modulates its behaviour. In the presence of agonist ligands, PR associates with ERalpha to direct ERalpha chromatin binding events within breast cancer cells, resulting in a unique gene expression programme that is associated with good clinical outcome. Progesterone inhibited oestrogen-mediated growth of ERalpha(+) cell line xenografts and primary ERalpha(+) breast tumour explants, and had increased anti-proliferative effects when coupled with an ERalpha antagonist. Copy number loss of PGR, the gene coding for PR, is a common feature in ERalpha(+) breast cancers, explaining lower PR levels in a subset of cases. Our findings indicate that PR functions as a molecular rheostat to control ERalpha chromatin binding and transcriptional activity, which has important implications for prognosis and therapeutic interventions.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4650274/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4650274/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mohammed, Hisham -- Russell, I Alasdair -- Stark, Rory -- Rueda, Oscar M -- Hickey, Theresa E -- Tarulli, Gerard A -- Serandour, Aurelien A -- Birrell, Stephen N -- Bruna, Alejandra -- Saadi, Amel -- Menon, Suraj -- Hadfield, James -- Pugh, Michelle -- Raj, Ganesh V -- Brown, Gordon D -- D'Santos, Clive -- Robinson, Jessica L L -- Silva, Grace -- Launchbury, Rosalind -- Perou, Charles M -- Stingl, John -- Caldas, Carlos -- Tilley, Wayne D -- Carroll, Jason S -- 242664/European Research Council/International -- 5P30CA142543/CA/NCI NIH HHS/ -- A10178/Cancer Research UK/United Kingdom -- England -- Nature. 2015 Jul 16;523(7560):313-7. doi: 10.1038/nature14583. Epub 2015 Jul 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Research UK Cambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UK. ; Dame Roma Mitchell Cancer Research Laboratories and the Adelaide Prostate Cancer Research Centre, School of Medicine, Hanson Institute Building, University of Adelaide, Adelaide, South Australia 5005, Australia. ; Department of Urology, University of Texas, Southwestern Medical Center at Dallas, Dallas, Texas 75390, USA. ; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, 450 West Drive, CB7295, Chapel Hill, North Carolina 27599, USA. ; 1] Cancer Research UK Cambridge Institute, University of Cambridge, Robinson Way, Cambridge CB2 0RE, UK [2] Cambridge Breast Unit, Addenbrooke's Hospital, Cambridge University Hospital NHS Foundation Trust and NIHR Cambridge Biomedical Research Centre, Cambridge CB2 2QQ, UK [3] Cambridge Experimental Cancer Medicine Centre, Cambridge CB2 0RE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26153859" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Breast Neoplasms/drug therapy/*genetics/*metabolism/pathology
;
Cell Line, Tumor
;
Cell Proliferation/drug effects
;
Chromatin/drug effects/genetics/metabolism
;
DNA Copy Number Variations/genetics
;
Disease Progression
;
Estrogen Receptor alpha/antagonists & inhibitors/*metabolism
;
Estrogens/metabolism/pharmacology
;
Female
;
*Gene Expression Regulation, Neoplastic/drug effects
;
Humans
;
Ligands
;
Mice
;
Progesterone/metabolism/pharmacology
;
Protein Binding/drug effects
;
Receptors, Progesterone/genetics/*metabolism
;
Transcription, Genetic/drug effects
;
Xenograft Model Antitumor Assays
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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