Related Experiment Video
Updated: Mar 3, 2026
A Protocol for Rapid Post-mortem Cell Culture of Diffuse Intrinsic Pontine Glioma DIPG
Published on: March 7, 2017
Transcriptional Dependencies in Diffuse Intrinsic Pontine Glioma
Surya Nagaraja1, Nicholas A Vitanza1, Pamelyn J Woo1
1Department of Neurology, Stanford University, Palo Alto, CA 94305, USA.
Abstract:
Diffuse intrinsic pontine glioma (DIPG) is a fatal pediatric cancer with limited therapeutic options. The majority of cases of DIPG exhibit a mutation in histone-3 (H3K27M) that results in oncogenic transcriptional aberrancies. We show here that DIPG is vulnerable to transcriptional disruption using bromodomain inhibition or CDK7 blockade. Targeting oncogenic transcription through either of these methods synergizes with HDAC inhibition, and DIPG cells resistant to HDAC inhibitor therapy retain sensitivity to CDK7 blockade. Identification of super-enhancers in DIPG provides insights toward the cell of origin, highlighting oligodendroglial lineage genes, and reveals unexpected mechanisms mediating tumor viability and invasion, including potassium channel function and EPH receptor signaling. The findings presented demonstrate transcriptional vulnerabilities and elucidate previously unknown mechanisms of DIPG pathobiology.
Insights
Diffuse intrinsic pontine glioma (DIPG), a pediatric cancer, shows vulnerability to transcriptional disruption. Targeting transcription, particularly with CDK7 blockade, offers new therapeutic strategies and synergizes with existing treatments.
Area of Science:
- Pediatric Oncology
- Cancer Genomics
- Molecular Biology
Background:
- Diffuse intrinsic pontine glioma (DIPG) is a highly aggressive pediatric brain tumor with a dismal prognosis.
- The H3K27M mutation is prevalent in DIPG, driving aberrant gene transcription crucial for tumor growth.
Purpose of the Study:
- To identify novel therapeutic vulnerabilities in DIPG by targeting transcriptional dysregulation.
- To explore the synergistic effects of combining different transcriptional inhibition strategies.
- To elucidate novel mechanisms of DIPG pathobiology and identify potential therapeutic targets.
Main Methods:
- Utilized bromodomain inhibitors and CDK7 blockade to disrupt oncogenic transcription in DIPG models.
- Investigated the synergy between transcriptional inhibitors and histone deacetylase (HDAC) inhibitors.
- Performed super-enhancer identification to understand DIPG cell of origin and signaling pathways.
Main Results:
- DIPG cells are sensitive to bromodomain inhibition and CDK7 blockade, leading to transcriptional disruption.
- Transcriptional targeting synergizes with HDAC inhibition, and CDK7 blockade overcomes resistance to HDAC inhibitors.
- Super-enhancer analysis revealed oligodendroglial lineage markers and identified potassium channels and EPH receptor signaling as key to tumor viability and invasion.
Conclusions:
- Transcriptional vulnerabilities represent a promising therapeutic avenue for DIPG.
- CDK7 blockade is a potential strategy to overcome resistance to HDAC inhibitors in DIPG.
- Novel pathways, including ion channel and receptor signaling, are critical for DIPG progression and offer new therapeutic targets.
More Related Videos
10:58Transposon Mediated Integration of Plasmid DNA into the Subventricular Zone of Neonatal Mice to Generate Novel Models of Glioblastoma
Published on: February 22, 2015
09:17Digital Spatial Profiling for Characterization of the Microenvironment in Adult-Type Diffusely Infiltrating Glioma
Published on: September 13, 2022
Related Concept Videos
01:20The Retinoblastoma Gene
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
01:31Translation
Translation Produces the Building Blocks of Life
Proteins are...
01:31Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
01:30General Transcription Factors