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Published on: October 4, 2019
Identification and Functional Characterization of Novel MYC-Regulated Long Noncoding RNAs in Group 3 Medulloblastoma
Jessica Rea1, Annamaria Carissimo2, Daniela Trisciuoglio3
1Department of Biology and Biotechnologies "C. Darwin", Sapienza University of Rome, 00185 Rome, Italy.
Abstract:
The impact of protein-coding genes on cancer onset and progression is a well-established paradigm in molecular oncology. Nevertheless, unveiling the contribution of the noncoding genes-including long noncoding RNAs (lncRNAs)-to tumorigenesis represents a great challenge for personalized medicine, since they (i) constitute the majority of the human genome, (ii) are essential and flexible regulators of gene expression and (iii) present all types of genomic alterations described for protein-coding genes. LncRNAs have been increasingly associated with cancer, their highly tissue- and cancer type-specific expression making them attractive candidates as both biomarkers and therapeutic targets. Medulloblastoma is one of the most common malignant pediatric brain tumors. Group 3 is the most aggressive subgroup, showing the highest rate of metastasis at diagnosis. Transcriptomics and reverse genetics approaches were combined to identify lncRNAs implicated in Group 3 Medulloblastoma biology. Here we present the first collection of lncRNAs dependent on the activity of the MYC oncogene, the major driver gene of Group 3 Medulloblastoma. We assessed the expression profile of selected lncRNAs in Group 3 primary tumors and functionally characterized these species. Overall, our data demonstrate the direct involvement of three lncRNAs in Medulloblastoma cancer cell phenotypes.
Insights
This study identifies novel long noncoding RNAs (lncRNAs) regulated by the MYC oncogene in aggressive Group 3 Medulloblastoma. Three specific lncRNAs were found to directly impact cancer cell phenotypes, offering potential new biomarkers and therapeutic targets.
Area of Science:
- Molecular Oncology
- Genomics
- Cancer Biology
Background:
- Long noncoding RNAs (lncRNAs) are crucial gene expression regulators and increasingly implicated in cancer.
- Group 3 Medulloblastoma is an aggressive pediatric brain tumor driven by the MYC oncogene.
- Identifying novel lncRNAs in this subgroup is vital for personalized medicine.
Purpose of the Study:
- To identify and characterize lncRNAs dependent on MYC activity in Group 3 Medulloblastoma.
- To investigate the functional role of these lncRNAs in Medulloblastoma biology.
- To explore the potential of lncRNAs as biomarkers and therapeutic targets.
Main Methods:
- Transcriptomics analysis to profile lncRNA expression.
- Reverse genetics approaches to assess lncRNA function.
- Expression profiling of selected lncRNAs in primary Group 3 Medulloblastoma tumors.
Main Results:
- The first collection of MYC-dependent lncRNAs in Group 3 Medulloblastoma was identified.
- Expression profiles of key lncRNAs were assessed in patient tumors.
- Three specific lncRNAs were functionally characterized and shown to directly influence Medulloblastoma cancer cell phenotypes.
Conclusions:
- The study demonstrates the direct involvement of three lncRNAs in Medulloblastoma cancer cell phenotypes.
- These findings highlight the importance of lncRNAs in Group 3 Medulloblastoma pathogenesis.
- The identified lncRNAs represent promising candidates for future biomarker and therapeutic strategies.
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