Microsatellite Instability in Pediatric High Grade Glioma
Author Information
Author(s): Viana-Pereira Marta, Lee Alicia, Popov Sergey, Bax Dorine A., Al-Sarraj Safa, Bridges Leslie R., Stávale João N., Hargrave Darren, Jones Chris, Reis Rui M.
Primary Institution: Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
Hypothesis
Is microsatellite instability (MSI) more prevalent in pediatric high grade gliomas compared to adult cases?
Conclusion
The study found that microsatellite instability is significantly more common in pediatric high grade gliomas than in adults.
Supporting Evidence
- MSI was found in 19.7% of pediatric cases compared to 6.8% in adults.
- 10 out of 13 pediatric MSI cases showed downregulation of MLH1 expression.
- MSI-positive pediatric gliomas exhibited a stable genomic profile.
Takeaway
Kids with a type of brain cancer called high grade glioma often have a special change in their DNA called microsatellite instability, which is less common in adults with the same cancer.
Methodology
The study analyzed DNA from 144 patients (71 pediatric and 73 adults) to determine MSI status using a panel of five markers and assessed gene expression and mutations.
Potential Biases
Potential bias due to the retrospective nature and lack of informed consent for all samples.
Limitations
The study was retrospective and some samples lacked matched normal DNA for comparison.
Participant Demographics
71 pediatric patients aged 4 months to 20 years and 73 adult patients aged 32 to 79 years.
Statistical Information
P-Value
0.02
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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