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Microarray-based gene expression profiling and DNA copy number variation analysis of temporal fossa arachnoid cysts
Mads Aarhus1, Christian A Helland, Morten Lund-Johansen
1Centre for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway. mads.aarhus@me.com
Cerebrospinal Fluid Research
|March 2, 2010
Summary
This study identified a small number of genes with altered expression and DNA changes in intracranial arachnoid cysts (AC) compared to normal arachnoid membranes, offering new insights into cyst formation.
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Intracranial arachnoid cysts (AC) are congenital, fluid-filled sacs often found in the temporal fossa.
- Symptoms include headache, dizziness, and cognitive impairment.
- The genetic basis of AC membrane formation remains largely unknown.
Purpose of the Study:
- To identify differences in gene expression between normal arachnoid membrane (AM) and AC membranes.
- To screen AC samples for chromosomal copy number variations.
Main Methods:
- High-resolution mRNA microarray analysis was used to compare gene expression in AC and AM tissues.
- DNA microarray-based copy number variation analysis was performed on AC samples.
Main Results:
- Gene expression profiles were nearly identical between AC and AM, with only nine genes showing differential expression.
- ASGR1, DPEP2, SOX9, SHROOM3, A2BP1, ATP10D, TRIML1, and NMU were downregulated in AC.
- BEND5 was upregulated in AC, and three samples showed DNA gains.
Conclusions:
- A small subset of differentially expressed genes and DNA alterations were identified in intracranial arachnoid cysts.
- These findings contribute to understanding the molecular basis of AC formation.
