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- W2568574476 abstract "// Giuseppina Roscigno 1, 2, * , Ilaria Puoti 1, 2, * , Immacolata Giordano 1 , Elvira Donnarumma 3 , Valentina Russo 1 , Alessandra Affinito 1 , Assunta Adamo 1 , Cristina Quintavalle 1, 2 , Matilde Todaro 4 , Maria dM Vivanco 5 , Gerolama Condorelli 1, 2 1 Department of Molecular Medicine and Medical Biotechnology, “Federico II” University of Naples, Naples, Italy 2 IEOS, CNR, Naples, Italy 3 IRCCS-SDN, Naples, Italy 4 Department of Pathobiology and Medical Biotechnology, University of Palermo, Palermo, Italy 5 CIC bioGUNE, Centre for Cooperative Research in Biosciences, Derio, Spain * These authors have contributed equally to the paper as first authors Correspondence to: Gerolama Condorelli, email: gecondor@unina.it Keywords: microRNAs, breast cancer, cancer stem cells, BimL, FIH1 Received: May 17, 2016 Accepted: November 30, 2016 Published: January 03, 2017 ABSTRACT Breast cancer remains one of the leading causes of cancer mortality among women. It has been proved that the onset of cancer depends on a very small pool of tumor cells with a phenotype similar to that of normal adult stem cells. Cancer stem cells (CSC) possess self-renewal and multilineage differentiation potential as well as a robust ability to sustain tumorigenesis. Evidence suggests that CSCs contribute to chemotherapy resistance and to survival under hypoxic conditions. Interestingly, hypoxia in turn regulates self-renewal in CSCs and these effects may be primarily mediated by hypoxic inducible factors (HIFs). Recently, microRNAs (miRNAs) have emerged as critical players in the maintenance of pluripotency and self-renewal in normal and cancer stem cells. Here, we demonstrate that miR-24 is upregulated in breast CSCs and that its overexpression increases the number of mammospheres and the expression of stem cell markers. MiR-24 also induces apoptosis resistance through the regulation of BimL expression. Moreover, we identify a new miR-24 target, FIH1, which promotes HIFα degradation: miR-24 increases under hypoxic conditions, causing downregulation of FIH1 and upregulation of HIF1α. In conclusion, miR-24 hampers chemotherapy-induced apoptosis in breast CSCs and increases cell resistance to hypoxic conditions through an FIH1−HIFα pathway." @default.
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- W2568574476 date "2017-01-03" @default.
- W2568574476 modified "2023-10-15" @default.
- W2568574476 title "MiR-24 induces chemotherapy resistance and hypoxic advantage in breast cancer" @default.
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- W2568574476 doi "https://doi.org/10.18632/oncotarget.14470" @default.
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