Association between Twist and multidrug resistance gene-associated proteins in Taxol ®-resistant MCF-7 cells and a 293 cell model of Twist overexpression.

Association between Twist and multidrug resistance gene-associated proteins in Taxol®-resistant MCF-7 cells and a 293 cell model of Twist overexpression. Oncol Lett. 2018 Jan;15(1):1058-1066 Authors: Wang L, Tan RZ, Zhang ZX, Yin R, Zhang YL, Cui WJ, He T Abstract Multidrug resistance (MDR) severely limits the effectiveness of chemotherapy. Previous studies have identified Twist as a key factor of acquired MDR in breast, gastric and prostate cancer. However, the underlying mechanisms of action of Twist in MDR remain unclear. In the present study, the expression levels of MDR-associated proteins, including lung resistance-related protein (LRP), topoisomerase IIα (TOPO IIα), MDR-associated protein (MRP) and P-glycoprotein (P-gp), and the expression of Twist in cancerous tissues and pericancerous tissues of human breast cancer, were examined. In order to simulate Taxol® resistance in cells, a Taxol®-resistant human mammary adenocarcinoma cell subline (MCF-7/Taxol®) was established by repeatedly exposing MCF-7 cells to high concentrations of Taxol® (up to 15 µg/ml). Twist was also overexpressed in 293 cells by transfecting this cell line with pcDNA5/FRT/TO vector containing full-length hTwist cDNA to explore the dynamic association between Twist and MDR gene-associated proteins. It was identified that the expression levels of Twist, TOPO IIα, MRP and P-gp were upregulated and LRP was downregulated in human breast ca...
Source: Oncology Letters - Category: Cancer & Oncology Tags: Oncol Lett Source Type: research

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Authors: Dandachi D, Wilson Dib R, Fernández-Cruz A, Jiang Y, Chaftari AM, Hachem R, Raad I Abstract BACKGROUND: The characteristics and management of invasive pulmonary aspergillosis (IPA) in patients with hematologic malignancies are well known, but IPA in patients with solid tumors is not well described. METHODS: We retrospectively reviewed all Aspergillus-positive cultures at a tertiary cancer center during 2004-2017. We identified 101 patients with IPA and solid tumors. We analyzed the association between clinical features and treatment and 12-week mortality and response to antifungal therapy. R...
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