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Identification of RNAs Engaged in Direct RNA-RNA Interaction with a Long Non-Coding RNA
Published on: July 9, 2021
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Identification of Long Noncoding RNAs That Exert Transcriptional Regulation by Forming RNA-DNA Triplexes in Prostate
Yugang Liang1, Yali Lu1, Qin Chen1
1State Key Laboratory of Genetic Engineering, Shanghai Engineering Research Center of Industrial Microorganisms, School of Life Science, Fudan University, Shanghai 200433, China.
International Journal of Molecular Sciences
|February 11, 2023
Summary
Long noncoding RNAs (lncRNAs) regulate gene expression and are implicated in prostate cancer (PCa). This study identifies lncRNA AC002128.1 as a key player, promoting PCa by forming RNA-DNA triplexes to enhance target gene transcription.
Area of Science:
- Molecular Biology
- Genomics
- Cancer Research
Background:
- Long noncoding RNAs (lncRNAs) are crucial regulators of gene expression.
- Dysregulation of lncRNAs is linked to the development of human cancers, including prostate cancer (PCa).
- The specific mechanisms by which lncRNAs contribute to PCa pathogenesis are not fully understood.
Purpose of the Study:
- To identify and characterize lncRNAs that interact with DNA and regulate mRNA transcription in prostate cancer.
- To elucidate the role of specific lncRNAs in promoting PCa development and progression.
- To explore the potential of identified lncRNAs as diagnostic biomarkers and therapeutic targets for PCa.
Main Methods:
- Utilized The Cancer Genome Atlas (TCGA) database to analyze gene expression data from PCa.
- Performed co-expression analysis to identify relationships between lncRNAs and protein-coding genes (PCGs).
- Screened lncRNAs for potential DNA interaction and promoter region binding, focusing on RNA-DNA triplex formation. Validated findings using functional assays in PCa cell lines.
Main Results:
- Identified 1148 differentially expressed lncRNAs in PCa and established extensive co-expression networks.
- Discovered 392 lncRNAs with the potential to form DNA:DNA:RNA triplexes, selecting AC002128.1 for further study.
- Demonstrated that lncRNA AC002128.1 is highly expressed in PCa, positively regulates target gene expression via triplex formation, and promotes cancer cell proliferation and motility while inhibiting apoptosis.
Conclusions:
- lncRNA AC002128.1 promotes prostate cancer progression by forming RNA-DNA triplexes that enhance target gene transcription.
- AC002128.1 functions as a potential prognostic biomarker and a therapeutic target for prostate cancer.
- Further research into lncRNA-mediated transcriptional regulation via triplex structures is warranted for cancer therapy development.
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