Publication Date:
2010-10-01
Description:
Breast cancer is one of the most common cancers in humans and will on average affect up to one in eight women in their lifetime in the United States and Europe. The Women's Health Initiative and the Million Women Study have shown that hormone replacement therapy is associated with an increased risk of incident and fatal breast cancer. In particular, synthetic progesterone derivatives (progestins) such as medroxyprogesterone acetate (MPA), used in millions of women for hormone replacement therapy and contraceptives, markedly increase the risk of developing breast cancer. Here we show that the in vivo administration of MPA triggers massive induction of the key osteoclast differentiation factor RANKL (receptor activator of NF-kappaB ligand) in mammary-gland epithelial cells. Genetic inactivation of the RANKL receptor RANK in mammary-gland epithelial cells prevents MPA-induced epithelial proliferation, impairs expansion of the CD49f(hi) stem-cell-enriched population, and sensitizes these cells to DNA-damage-induced cell death. Deletion of RANK from the mammary epithelium results in a markedly decreased incidence and delayed onset of MPA-driven mammary cancer. These data show that the RANKL/RANK system controls the incidence and onset of progestin-driven breast cancer.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3084017/" 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/PMC3084017/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schramek, Daniel -- Leibbrandt, Andreas -- Sigl, Verena -- Kenner, Lukas -- Pospisilik, John A -- Lee, Heather J -- Hanada, Reiko -- Joshi, Purna A -- Aliprantis, Antonios -- Glimcher, Laurie -- Pasparakis, Manolis -- Khokha, Rama -- Ormandy, Christopher J -- Widschwendter, Martin -- Schett, Georg -- Penninger, Josef M -- HD055601/HD/NICHD NIH HHS/ -- R01 HD055601/HD/NICHD NIH HHS/ -- R01 HD055601-04/HD/NICHD NIH HHS/ -- England -- Nature. 2010 Nov 4;468(7320):98-102. doi: 10.1038/nature09387. Epub 2010 Sep 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, 1030 Vienna, Austria.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20881962" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Apoptosis/radiation effects
;
Cell Differentiation
;
Cell Proliferation/drug effects
;
DNA Damage
;
Epithelial Cells/cytology/drug effects/metabolism/radiation effects
;
Female
;
Gamma Rays
;
Integrin alpha6/metabolism
;
Mammary Neoplasms, Experimental/*chemically
;
induced/genetics/metabolism/*pathology
;
Medroxyprogesterone Acetate/administration & dosage/adverse effects
;
Mice
;
NF-kappa B/metabolism
;
Osteoclasts/cytology
;
Phosphoproteins/analysis/immunology
;
Progestins/administration & dosage/*adverse effects
;
RANK Ligand/deficiency/genetics/*metabolism
;
Receptor Activator of Nuclear Factor-kappa B/deficiency/genetics/metabolism
;
Signal Transduction
;
Stem Cells/cytology/drug effects/metabolism
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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