Related Experiment Video
Updated: Aug 15, 2026
Isolation, Enrichment, and Maintenance of Medulloblastoma Stem Cells
Published on: September 2, 2010
Comparison of medulloblastoma and normal neural transcriptomes identifies a restricted set of activated genes
Kathy Boon1, Jennifer B Edwards, I-Mei Siu
1Department of Pathology, Duke University Medical Center, Box 3156, Durham NC 27710, USA.
Abstract:
Over 1.4 million transcript tags expressed in 20 different human medulloblastomas were counted using serial analysis of gene expression. Digital gene expression profiles in the medulloblastoma were compared to multiple regions of the normal human brain, revealing 30 transcripts with high expression in multiple tumors and little or no expression in the normal cerebellum and other adult and pediatric brain regions. Using independent medulloblastoma samples and normal tissue, real-time PCR verified eight of nine selected genes as candidate tumor-associated antigens. Differential protein expression for CD24, prolactin and Topo2A was further confirmed by immunohistochemical analysis using medulloblastoma and normal brain sections and a tissue microarray. The genes highly expressed in the medulloblastoma include PRAME, a cancer-testis antigen and potential targets for immunotherapy.
Insights
Researchers identified 30 transcripts highly expressed in human medulloblastomas compared to normal brain tissue. Eight of these genes are potential tumor-associated antigens, including PRAME, a target for immunotherapy.
Area of Science:
- Oncology
- Neuroscience
- Molecular Biology
Background:
- Medulloblastoma is a common pediatric brain tumor.
- Identifying tumor-specific antigens is crucial for targeted therapies.
Purpose of the Study:
- To identify novel tumor-associated antigens in medulloblastoma.
- To explore potential targets for medulloblastoma immunotherapy.
Main Methods:
- Serial analysis of gene expression (SAGE) was used to profile 1.4 million transcripts from 20 medulloblastomas.
- Digital gene expression profiles were compared to normal human brain regions.
- Real-time PCR and immunohistochemistry validated candidate genes and proteins.
Main Results:
- 30 transcripts showed high expression in medulloblastomas but low/no expression in normal brain tissues.
- Eight of nine selected genes were verified as candidate tumor-associated antigens.
- Differential protein expression of CD24, prolactin, and Topo2A was confirmed.
Conclusions:
- Several highly expressed genes in medulloblastoma, such as PRAME, represent potential targets for immunotherapy.
- This study provides a foundation for developing targeted therapies against medulloblastoma.
