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Updated: Jun 27, 2026
09:40
Characterization of Functionally Associated miRNAs in Glioblastoma and their Engineering into Artificial Clusters for Gene Therapy
Published on: October 4, 2019
Functional interaction between miR-505-3p and miR-21 contributes to GBM suppression.
Mohammadreza Zare Banadkooki1, Bahram Mohammad Soltani1, Seyed Javad Mowla2
1Department of Molecular Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.
Scientific Reports
|June 25, 2026
Summary
MicroRNA-505-3p may suppress glioblastoma (GBM) by modulating oncogenic microRNA-21 (miR-21) processing. This interaction restores tumor suppressor gene expression and reduces GBM cell proliferation.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- Non-coding RNAs (ncRNAs), including microRNAs (miRs), are crucial in cancer development.
- miR-21 is an oncogenic miR implicated in glioblastoma (GBM).
- miR-505-3p acts as a tumor suppressor (TSG).
Purpose of the Study:
- Investigate the interaction between miR-505-3p and miR-21 in GBM.
- Determine if miR-505-3p can modulate miR-21 expression and its targets.
Main Methods:
- Bioinformatic analysis and RNA hybridization modeling.
- Overexpression of miR-505-3p in GBM cell lines (U87-MG, A172).
- Analysis of mature miR-21 levels, miR-21 target gene expression (PDCD4, HNRNPK, RECK), and cell proliferation assays.
- Dual luciferase reporter assays to assess miR-21 processing.
Main Results:
- Bioinformatics predicted and modeling supported miR-505-3p interaction with pri-miR-21.
- miR-505-3p overexpression reduced mature miR-21-5p levels in GBM cells.
- Increased expression of miR-21 target genes (PDCD4, HNRNPK, RECK) was observed.
- Functional assays showed reduced cell proliferation and increased apoptosis (sub-G1 population).
- Dual luciferase assays indicated miR-505-3p may interfere with miR-21 processing.
Conclusions:
- miR-505-3p demonstrates potential to modulate miR-21 expression in GBM.
- This interaction is associated with the restoration of tumor suppressor gene expression.
- The findings suggest a novel regulatory axis with therapeutic implications for GBM, though precise mechanisms require further elucidation.
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