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Topotecan-induced ABCG2 expression in MCF-7 cells is associated with decreased CD24 and EpCAM expression and a loss of tumorigenicity

Huber, Stefan ; Wege, Anja K. ; Bernhardt, Günther ; Buschauer, Armin ; Brockhoff, Gero


Human breast cancer shows a considerable heterogeneity regarding the expression of CD24, CD44, EpCAM, and HER2. These markers are involved in cell adhesion, migration, and proliferation, and thus affect metastasis and, in turn, patient's outcome. The ATP-driven efflux pump (ABC transporter) breast cancer resistance protein (BCRP, ABCG2) is known to confer resistance to a wide variety of ...


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