The P300 as a possible endophenotype for schizophrenia and bipolar disorder: Evidence from twin and patient studies

Abstract It has been proposed that psychophysiological abnormalities in schizophrenia, such as decreased amplitude of the evoked potential component P300, may be genetically influenced. Studies of heritability of the P300 have used different and typically more complex tasks than those used in clinic...

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Bibliographic Details
Published in:Psychiatry research 2009-10, Vol.169 (3), p.212-219
Main Authors: Bestelmeyer, Patricia E.G, Phillips, Louise H, Crombie, Caroline, Benson, Philip, St.Clair, David
Format: Article
Language:English
Subjects:
Acoustic Stimulation - methods
Adult
Adult and adolescent clinical studies
Biological and medical sciences
Bipolar disorder
Bipolar Disorder - genetics
Bipolar Disorder - physiopathology
Bipolar disorders
Diseases in Twins
Electroencephalography - methods
Endophenotype
Event-Related Potentials, P300 - physiology
Female
Heritability
Humans
Male
Medical sciences
Middle Aged
Mood disorders
Multivariate Analysis
Neuropsychological Tests
P300
Photic Stimulation - methods
Psychiatry
Psychoacoustics
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Psychoses
Reaction Time - physiology
Schizophrenia
Schizophrenia - genetics
Schizophrenia - physiopathology
Trait marker
Twin Studies as Topic
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Summary:Abstract It has been proposed that psychophysiological abnormalities in schizophrenia, such as decreased amplitude of the evoked potential component P300, may be genetically influenced. Studies of heritability of the P300 have used different and typically more complex tasks than those used in clinical studies of schizophrenia. Here we present data on P300 parameters on the same set of auditory and visual tasks in samples of twins, and patients with schizophrenia or bipolar disorder to examine the P300 as a possible endophenotype. Evidence from the twin study indicated that the auditory, but not visual, P300 amplitude is genetically influenced at centro-parietal sites. Similarly, auditory and to a lesser extent visual P300 amplitude were decreased in schizophrenia and bipolar disorder. Results indicate that the auditory P300 may serve as an endophenotype for schizophrenia. However, given that schizophrenia and bipolar disorder patients could not be distinguished on these measures at midline sites, it appears that the P300 may be a marker for functional psychosis in general rather than being specific to schizophrenia.
ISSN:0165-1781
1872-7123
DOI:10.1016/j.psychres.2008.06.035