At present, there is an extensive body of literature documenting the participation of estrogen
receptors (ER) and progesterone receptors (PR) in mammary gene expression. Yet, the …

The appearance, epithelial and stromal cell distribution of estrogen receptors (ER) in normal
mouse mammary gland were determined between 1 and 10 weeks of age using …

A relatively small number of cells in the normal human mammary gland express receptors
for oestrogen and progesterone (ER and PR), and there is almost complete dissociation …

Steroid hormones, in particular estrogen and progesterone, play important roles in normal
and neoplastic breast development. Alterations in both estrogen signaling and progesterone …

Ovarian steroid hormones play a critical role inregulating mammary gland growth and
development. Themammary gland sequentially acquires and cyclicallyexhibits proliferative …

Abstract Estrogen, mainly estradiol (E2), and progesterone (P) are essential for the growth
and differentiation of the breast, but their roles in breast cancer are highly debated. To …

Estrogen receptors (ER) and progesterone receptors (PgR) were studied
immunohistochemically using specific antireceptor monoclonal antibodies in uterine tissue …

Measurements performed using cell lines or animal tissues have shown that the
progesterone receptor (PR) can be induced by estrogens. By use of immunohistochemistry …

Despite recent gains in our knowledge of the hormonal control of proliferation and
differentiation in the rodent mammary gland, the factors regulating these processes in the …

The ovarian hormones estrogen and progesterone are master regulators of the development
and function of a broad spectrum of human tissues, including the breast, reproductive and …