The Osteoblast Transcription Factor Runx2 Is Expressed in Mammary Epithelial Cells and Mediates osteopontin Expression

Abstract excerpt

Targeted deletion of the Runx2 gene in mice has demonstrated that Runx2 is a master regulator of osteoblast differentiation. Runx2 has therefore largely been regarded as a bone-specific transcription factor. Runx2-/- mice die shortly after birth and therefore the role of Runx2 in later developing tissues remains unclear. Here we show that the Runx2 protein is expressed in several mammary epithelial cell lines and...

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