Related Experiment Video
Updated: Mar 3, 2026
Characterization of Functionally Associated miRNAs in Glioblastoma and their Engineering into Artificial Clusters for Gene Therapy
Published on: October 4, 2019
miRNA Regulation in Gliomas: Usual Suspects in Glial Tumorigenesis and Evolving Clinical Applications
Heather Ames1, Marc K Halushka2,3, Fausto J Rodriguez1,3
1Division of Neuropathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
Abstract:
In recent years, an increasing role for noncoding small RNAs (miRNA) has been uncovered in carcinogenesis. These oligonucleotides can promote degradation and/or inhibit translation of key mRNAs. Recent studies have also highlighted a possible role for miRNAs in adult and pediatric brain tumors, including high- and low-grade gliomas, medulloblastoma, ependymoma, and neoplasms associated with neurofibromatosis type 1. Gliomas represent the most common category of primary intraparenchymal brain tumors, and, for example, manipulation of signaling pathways, through inhibition of PTEN transcription appears to be an important function of miRNA dysregulation through miR-21, miR-106b, and miR-26a. Moreover, altered miRNA expression in gliomas play roles in the regulation of common tumorigenic processes, including receptor tyrosine kinase signaling, angiogenesis, invasion, suppression of differentiation, cell cycle enhancement, and inhibition of apoptosis. Suppression of differentiation requires the downregulation of a number of miRNAs that are both enriched in the brain and required for terminal glial differentiation, including miR-219 and miR-338. Our evolving understanding about the biology of gliomas make them attractive for miRNA study, given that recent evidence suggests that epigenetic and subtle genetic changes may contribute to their pathogenesis. Identification of key miRNAs also provides a rationale for developing robust biomarkers and inhibitory RNA strategies for therapeutic purposes in glioma patients.
Insights
MicroRNAs (miRNAs) play a crucial role in brain tumor development, particularly gliomas. Understanding these small RNAs offers potential for new diagnostic biomarkers and therapeutic strategies.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Noncoding small RNAs, specifically microRNAs (miRNAs), are increasingly recognized for their roles in cancer development (carcinogenesis).
- miRNAs regulate gene expression by degrading messenger RNAs (mRNAs) or inhibiting their translation.
- Emerging research implicates miRNAs in various brain tumors, including gliomas, medulloblastoma, and ependymomas.
Purpose of the Study:
- To explore the role of microRNAs (miRNAs) in the pathogenesis of gliomas.
- To identify specific miRNAs involved in key tumorigenic processes within gliomas.
- To assess the potential of miRNAs as biomarkers and therapeutic targets for glioma treatment.
Main Methods:
- Review of recent studies on miRNA involvement in adult and pediatric brain tumors.
- Analysis of miRNA dysregulation in gliomas, focusing on pathways like PTEN transcription.
- Investigation of miRNAs associated with glioma hallmarks such as angiogenesis, invasion, and apoptosis.
Main Results:
- miRNA dysregulation, including miR-21, miR-106b, and miR-26a, impacts signaling pathways like PTEN inhibition in gliomas.
- Altered miRNA expression contributes to glioma progression by regulating receptor tyrosine kinase signaling, angiogenesis, invasion, differentiation suppression, cell cycle, and apoptosis.
- Specific miRNAs, such as miR-219 and miR-338, are crucial for glial differentiation and are downregulated in gliomas.
Conclusions:
- miRNAs are significantly implicated in the biology and progression of gliomas.
- Understanding miRNA functions in gliomas provides a basis for developing novel diagnostic biomarkers.
- Targeting specific miRNAs offers a promising therapeutic avenue for glioma patients.
More Related Videos
Related Concept Videos
01:22MicroRNAs
01:22MicroRNAs