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Updated: Mar 5, 2026
Isolation, Enrichment, and Maintenance of Medulloblastoma Stem Cells
Published on: September 1, 2010
Detection of lower levels of SNAP25 using multiple microarray systems and its functional significance in
Chi-Jung Huang1, Chia-Long Lee2, Chih-Yi Liu3
1Department of Biochemistry, National Defense Medical Center, Taipei 11490, Taiwan, R.O.C.
Abstract:
Medulloblastoma (MB) is the most common pediatric malignant brain tumor and patients with high-risk or recurrent MB respond poorly to current therapies, and have a higher related mortality. For this reason, potential molecules related to MB need be identified in order to develop targets for the development of novel therapeutics. In the present study, we compared MB microarray data obtained using different microarray systems and significant targets were selected by gene annotation and enrichment analysis. Genes for soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs) annotated with the function 'vesicle' were identified and one of these proteins, synaptosomal-associated protein 25 (SNAP25), was found to have significantly lower expression levels in MB. In addition, SNAP25 was detected in a very low number of MB cells as shown by western blot analysis and immunohistochemical analyses of archived and formalin-fixed/paraffin-embedded human MB specimens. We found that SNAP25 altered the morphology and the chemotherapeutic effects of arabinofuranosyl cytidine (Ara-C) on SNAP25-expressing MB cells. On the whole, our data indicate that the expression of SNAP25 is crucial for dendrite formation and is associated with the effects of targeted chemotherapy. The detection of SNAP25 expression in MB cells may thus be essential for the chemotherapeutic application of Ara-C.
Insights
Synaptosomal-associated protein 25 (SNAP25) is significantly underexpressed in medulloblastoma (MB), a pediatric brain tumor. Lower SNAP25 levels impact MB cell morphology and response to chemotherapy, suggesting its potential as a therapeutic target.
Area of Science:
- Neuro-oncology
- Molecular Biology
- Genomics
Background:
- Medulloblastoma (MB) is the most common pediatric malignant brain tumor.
- High-risk or recurrent MB patients exhibit poor response to current therapies, necessitating novel therapeutic targets.
Purpose of the Study:
- To identify potential molecular targets for novel therapeutics in medulloblastoma.
- To investigate the role of synaptosomal-associated protein 25 (SNAP25) in MB.
Main Methods:
- Comparative analysis of MB microarray data from different systems.
- Gene annotation and enrichment analysis to identify significant targets.
- Western blot and immunohistochemical analyses of human MB specimens.
Main Results:
- Soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs) involved in vesicle function were identified.
- Synaptosomal-associated protein 25 (SNAP25) showed significantly lower expression in MB.
- SNAP25 expression influenced MB cell morphology and response to arabinofuranosyl cytidine (Ara-C) chemotherapy.
Conclusions:
- SNAP25 expression is crucial for dendrite formation in MB cells.
- SNAP25 expression is associated with the efficacy of targeted chemotherapy.
- Detecting SNAP25 expression may be essential for optimizing Ara-C chemotherapy in MB patients.
