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BCLIN25 / miRNA-125b axis regulates chemotherapeutic resistance and epithelial-mesenchymal transition

ABSTRACT: paclitaxel-resistant triple-negative breast cancer cell lines (MDA-MB-231/PTX）transfect BCLIN25-specific si-BCLIN25 to knockdown BCLIN25 and analysis differential paclitaxel-resistantlung adenocarcinoma cell lines（PC9/GR）transfect HUMT-specific shHUMT to knockdown HUMT1 and analysis differential

ORGANISM(S): Homo sapiens

PROVIDER: GSE179144 | GEO | 2021/07/06

REPOSITORIES: GEO

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The long noncoding RNA SNHG1 promotes carboplatin resistance retinoblastoma

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miR-1061 and miR-591 are involved in paclitaxel-resistance and their regulation increases the sensitivity to paclitaxel

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miR-1061 and miR-591 are involved in paclitaxel-resistance and their regulation increases the sensitivity to paclitaxel

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Transcriptional screening in MDA-231 cells treated with low-dose Paclitaxel for 24 and 48 hours

Project description:Paclitaxel is the most commonly used chemotherapeutic agent in breast cancer treatment. Notably, a comprehensive understanding of paclitaxelâs effects requires insight into the dose-specific activities of paclitaxel and their influence on the cancer cells and host microenvironment. The aim of our study is to reveal the gene transcriptional changes in response to low-Paclitaxel (PTX) treatment in breast cancer cells. For genome-wide gene expression analysis, MDA-MB-231 cells (high-invasive breast cancer cell line) were treated with 5 ng/ml PTX for 24 and 48 hours respectively and then the cell lysates were prepared by TRIzol reagent. Then the total RNA in each group was extracted and the genome-wide gene expressing profile was detected through the Human One Array (HOA) Microarray system (Phalanx Biotech Group, Taiwan).

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Project description:Background: Paclitaxel is touted as an essential medicine due to its extensive use as a chemotherapeutic for various cancers and an antiproliferative agent for restenosis. Due to recent concerns related to long-term mortality, paclitaxel (PTX)-based endovascular therapy is now surrounded by controversies. Objective: Examine the inflammatory mediators driven by the systemic administration of PTX and explore the means to suppress these effects. Methods: RNAseq analysis, cell and mouse models. Results: RNAseq analysis of primary human endothelial cells (ECs) treated with PTX demonstrated transcriptional perturbations of a set of pro-inflammatory mediators, including monocyte chemoattractant protein-1 (MCP-1) and CD137, which were validated in EC lysates. These perturbations were abrogated with dexamethasone, a prototypic anti-inflammatory compound. The media of ECs pre-treated with PTX showed a significant increase in MCP-1 levels, which were reverted to baseline levels with DEX treatment. A group of mice harvested at different time points after PTX injection were analyzed for immediate and delayed effects of PTX. A 3-fold increase in MCP-1 was noted in blood and aortic ECs after 12 hours of PTX treatment. Similar changes in CD137 and downstream mediators such as tissue factor, VCAM-1 and E-selectin were noted in aortic ECs. Conclusions: Our study shows that systemic PTX exposure upregulates atherothrombotic markers, and co-delivery of DEX can subdue the untoward toxic effects. Long-term studies are needed to probe the mechanisms driving systemic complications of PTX-based therapies and evaluate the clinical potential of DEX to mitigate risk.

2023-03-02 | GSE217550 | GEO

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