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Cyclooxygenase-2 expression during immortalization and breast cancer progression.
Identification of molecular aberrations in premalignant human mammary epithelial cells (hMEC), the precursors for breast cancers, is a central goal in breast cancer biology. Recent studies implicated expression of cyclooxygenase 2 (COX-2) a…
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Down-regulation of activin, activin receptors, and Smads in high-grade breast cancer.
Activin and transforming growth factor (TGF)-beta, members of the TGF-beta superfamily of growth factors, have been implicated in both mammary gland development and breast carcinogenesis. TGF-beta is thought to be involved in the maintenanc…