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• W2427839911 endingPage "651" @default.
• W2427839911 startingPage "645" @default.
• W2427839911 abstract "Although paclitaxel (Taxol) is an active chemotherapeutic agent for the treatment of breast cancer, not all breast tumors are sensitive to this drug. In particular, there is a wide agreement on the low sensitivity of estrogen receptor (ER) α-positive breast cancer to paclitaxel treatment. However, the ERα-based insensitivity to paclitaxel is still elusive. Here, the effect of the E2/ERα-dependent upregulation of neuroglobin (NGB), an antiapoptotic globin, on the reduced sensitivity of breast cancer cells to paclitaxel-induced apoptosis has been evaluated in ERα-containing MCF-7 cells. The E2 pretreatment enhances the ERα activity and significantly impairs paclitaxel-induced apoptosis as evaluated by Annexin V assay and PARP-1 cleavage. NGB displays a pivotal role in the E2/ERα-induced antiapoptotic pathway to abrogate paclitaxel-induced cell death in stable NGB-silenced MCF-7 cell clones. Moreover, in the absence of the active ERα, paclitaxel significantly reduces the NGB cell content. In conclusion, these results highlight the involvement of ERα activation and of E2/ERα-dependent NGB upregulation in the insensitivity of MCF-7 to paclitaxel. These novel findings could have important implications in the development of targeted therapeutics for overcoming paclitaxel insensitivity in ERα-positive human breast cancer. © 2016 IUBMB Life, 68(8):645–651, 2016" @default.
• W2427839911 created "2016-06-24" @default.
• W2427839911 creator A5000136249 @default.
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• W2427839911 date "2016-06-16" @default.
• W2427839911 modified "2023-10-18" @default.
• W2427839911 title "Neuroglobin overexpression induced by the 17<i>β</i>-Estradiol-Estrogen receptor-α Pathway reduces the sensitivity of MCF-7 Breast cancer cell to paclitaxel" @default.
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• W2427839911 doi "https://doi.org/10.1002/iub.1522" @default.
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• W2427839911 hasPublicationYear "2016" @default.
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