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Amphiregulin mediates the hormonal regulation on Rspondin-1 expression in the mammary gland.

Dev Biol. 2020 Feb 01;458(1):43-51. Epub 2019 Oct 11
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摘要


The steroid hormones are instrumental for the growth of mammary epithelial cells. Our previous study indicates that hormones regulate the expression of Rspondin-1 (Rspo1). Yet, the regulatory mechanism remains unknown. In the current study, we identify Amphiregulin (Areg) as a novel upstream regulator of Rspo1 expression mediating the hormonal influence. In response to hormonal signaling, Areg emanating from estrogen receptor (ER)-positive luminal cells, induce the expression of Rspo1 in ER-negative luminal cells. The paracrine action of Areg on Rspo1 expression is dependent on Egfr. Our data reveal a novel Estrogen-Areg-Rspo1 regulatory axis in the mammary gland, providing new evidence for the orchestrated action of systemic hormones and local growth factors.

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