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Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
Published on: February 21, 2014
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Genome-wide profiling of long non-coding RNA expression patterns in anthracycline-resistant breast cancer cells
Dong-Xu He1, Guang-Yuan Zhang1, Xiao-Ting Gu2
1National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu 214122, P.R. China.
International Journal of Oncology
|September 17, 2016
Summary
This study reveals novel long non-coding RNAs (lncRNAs) that drive adriamycin resistance in breast cancer. These lncRNAs impact cell cycle and chemoresistance through cis- and trans-regulation of gene expression.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Long non-coding RNAs (lncRNAs) play a role in cancer progression.
- Understanding lncRNA involvement in chemoresistance is crucial for developing effective cancer therapies.
Purpose of the Study:
- To identify and characterize dysregulated lncRNAs in adriamycin-resistant breast cancer cells.
- To elucidate the mechanisms by which lncRNAs mediate chemoresistance.
- To discover novel lncRNA targets for overcoming adriamycin resistance.
Main Methods:
- Comparative analysis of lncRNA profiles in adriamycin-resistant and -sensitive breast cancer cells.
- Correlation analysis between lncRNA and mRNA expression.
- Gene Ontology (GO) and KEGG pathway enrichment analysis.
- Validation of specific lncRNA functions (e.g., NONHSAT028712, NONHSAT057282, NONHSAG023333) in regulating cell cycle and chemoresistance.
Main Results:
- A set of lncRNAs were found to be dysregulated in adriamycin-resistant breast cancer cells.
- Dysregulated lncRNAs and mRNAs were enriched in cancer progression and chemoresistance-associated pathways.
- The lncRNA NONHSAT028712 was shown to regulate CDK2, affecting cell cycle and chemoresistance.
- Other lncRNAs (NONHSAT057282, NONHSAG023333) were identified to modulate chemoresistance via transcription factor interactions (ELF1, E2F1).
Conclusions:
- This study presents the first comprehensive lncRNA expression patterns in adriamycin-resistant breast cancer.
- Novel lncRNAs mediating chemoresistance through both cis- and trans-regulatory mechanisms were identified.
- These findings offer potential new therapeutic targets for overcoming adriamycin resistance in breast cancer.
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