Imp3 Promotes Chemo-resistance in Breast Cancer Cells by Regulating Bcrp (abcg2) Expression*
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Celecoxib Up Regulates the Expression of Drug Efflux Transporter ABCG2 in Breast Cancer Cell Lines
Elevated expression of the drug efflux transporter ABCG2 seems to correlate with multidrug resistance of cancer cells. Specific COX-2 inhibitor celecoxib has been shown to enhance the sensitivity of cancer cells to anticancer drugs. To clarify whether ABCG2 inhibition is involved in the sensitizing effect of celecoxib, we investigated whether the expression of ABCG2 in breast cancer cell lines ...
متن کاملCelecoxib Up Regulates the Expression of Drug Efflux Transporter ABCG2 in Breast Cancer Cell Lines
Elevated expression of the drug efflux transporter ABCG2 seems to correlate with multidrug resistance of cancer cells. Specific COX-2 inhibitor celecoxib has been shown to enhance the sensitivity of cancer cells to anticancer drugs. To clarify whether ABCG2 inhibition is involved in the sensitizing effect of celecoxib, we investigated whether the expression of ABCG2 in breast cancer cell lines ...
متن کاملProgesterone negatively regulates BCRP in progesterone receptor-positive human breast cancer cells.
BACKGROUND/AIMS Breast cancer resistance protein (BCRP) plays a crucial role in multidrug resistance (MDR). Previous studies have shown that steroid hormones, like progesterone (PROG), regulate BCRP expression. The presence of a progesterone response element (PRE) in the BCRP promoter, suggests that PROG may regulate transcription of BCRP. METHODS To investigate the role of PROG in the regula...
متن کاملEstrogen-mediated post transcriptional down-regulation of breast cancer resistance protein/ABCG2.
Breast cancer resistance protein (BCRP)/ABCG2 mediates concurrent resistance to chemotherapeutic agents, such as 7-ethyl-10-hydroxycamptothecin (SN-38), mitoxantrone, and topotecan, by pumping them out of cells. We previously reported that BCRP transports sulfated estrogens. In the present study, we show that at physiologic levels, estrogens markedly decrease endogenous BCRP expression in the e...
متن کاملG protein-coupled KISS1 receptor is overexpressed in triple negative breast cancer and promotes drug resistance
Triple-negative breast cancer (TNBC) lacks the expression of estrogen receptor α, progesterone receptor and human epidermal growth factor receptor 2 (HER2). TNBC patients lack targeted therapies, as they fail to respond to endocrine and anti-HER2 therapy. Prognosis for this aggressive cancer subtype is poor and survival is limited due to the development of resistance to available chemotherapies...
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تاریخ انتشار 2013