Related Experiment Video
Updated: Aug 12, 2026
10:17
An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
Published on: November 3, 2010
Is there an association between the COMT gene and P300 endophenotypes?
E Bramon1, E Dempster, S Frangou
1Institute of Psychiatry, King's College London, De Crespigny Park, London SE5 8AF, UK. e.bramon@iop.kcl.ac.uk
Summary
This study investigated the COMT gene
Area of Science:
- Neuroscience
- Genetics
- Psychiatry
Background:
- P300 wave anomalies are linked to schizophrenia genetic risk and may serve as an endophenotype.
- The COMT gene is implicated in cognitive functions and schizophrenia susceptibility.
- Previous research suggests a link between COMT gene and P300, but findings are inconsistent.
Purpose of the Study:
- To examine the influence of the COMT Val158Met polymorphism on P300 amplitude and latency.
- To investigate the COMT gene's role as a potential endophenotype marker for schizophrenia.
Main Methods:
- Electroencephalography (EEG) was used to record P300.
- Genotyping for the COMT Val158Met polymorphism was performed.
- P300 measures (amplitude and latency) were analyzed in relation to COMT genotype in 189 individuals.
Main Results:
- No significant association was found between the COMT Val158Met polymorphism and P300 amplitude or latency.
- This finding contrasts with some previous studies.
- The effect of COMT on P300, if any, appears to be subtle.
Conclusions:
- The COMT Val158Met polymorphism does not appear to significantly influence P300 measures in this cohort.
- The theoretical link between COMT, prefrontal cognition, dopamine, and P300 endophenotypes may be weak or require further investigation with larger sample sizes or different methodologies.
- Further research is needed to clarify the subtle neurophysiological evidence for COMT's influence on P300.
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