Cytokeratin 5/6 in normal human breast: lack of evidence for a stem cell phenotype.

Abstract excerpt

In recent studies, Böcker and colleagues described a population of cells in paraffin wax sections of normal human breast that express cytokeratins (CK) 5/6 without expression of CK8/18 or smooth muscle actin (SMA). They proposed that these represent stem cells that give rise to differentiated luminal and myoepithelial cells. The data have been used to generate a model for breast cancer progression and...

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