Progesterone receptors - animal models and cell signaling in breast cancer: Role of steroid receptor coactivators and corepressors of progesterone receptors in breast cancer

Breast Cancer Res. 2002;4(5):182-6. doi: 10.1186/bcr449. Epub 2002 Jun 28.


Progesterone, an ovarian steroid hormone, plays a key role in the development and function of the mammary gland, as it also does in the uterus and the ovary. The action of progesterone is mediated through its intracellular cognate receptor, the progesterone receptor (PR), which functions as a transcription factor that regulates gene expression. As with other nuclear receptors, coregulators (coactivators and corepressors) recruited by the liganded or unliganded PR, either to enhance or to suppress transcription activity, modulate the function of the PR. Mutation or aberrant expression of the coregulators might thus affect the normal function of the PR and hence disrupt the normal development of the mammary gland, which may lead to breast cancer.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.
  • Review

MeSH terms

  • Animals
  • Breast Neoplasms / metabolism*
  • Breast Neoplasms / pathology
  • Cell Division
  • Disease Models, Animal
  • Female
  • Humans
  • Mice
  • Nuclear Proteins / metabolism
  • Nuclear Receptor Co-Repressor 1
  • Receptor Cross-Talk / physiology*
  • Receptors, Progesterone / physiology*
  • Repressor Proteins / metabolism
  • Signal Transduction
  • Trans-Activators / metabolism
  • Transcription, Genetic


  • NCOR1 protein, human
  • Ncor1 protein, mouse
  • Nuclear Proteins
  • Nuclear Receptor Co-Repressor 1
  • Receptors, Progesterone
  • Repressor Proteins
  • Trans-Activators