POSTER
MITOCHONDRIAL
DYSFUNCTION IN SCHIZOPHRENIA: OXIDATIVE STRESSING
S.
Huffamer1,2, M. Ryan1,2, and S. Bahn1,2
1Department of
Neurobiology, Babraham Institute, Cambridge CB2 4AT, UK; 2Department
of Psychiatry, University of Cambridge, Addenbrooke’s Hospital, Cambridge CB2
1QQ, UK
The onset
and etiology of schizophrenia has been implicated with a wide range of genetic
and epigenetic factors with limited agreement of the true causality. The
ambiguousness of the causative agents and the heterogeneity of behavioral
phenotypes have been suggested as evidence that schizophrenia is a “catch-all”
category describing many etiologically heterogeneous neuropsychiatric
abnormalities.
Using
Affymetrix microarray technology representing 22,000+ human transcripts, we have
generated a dataset from the prefrontal cortex of 106 well-matched unaffected
and schizophrenia patients. We observed significant changes in transcripts
encoding genes involved in mitochondrial function and oxidative stress reaction
pathways in schizophrenia patients. Converging proteomics and metabolomics
investigations imply that dysregulations of metabolic activity and increased
levels of reactive oxygen species may closely underlie the symptoms of
schizophrenia, despite the apparent heterogeneity of the disorder and its
causative factors
Our
findings point toward oxidative stress injury and perhaps microvasculature
abnormalities in patients suffering from schizophrenia and related syndromes.
However, the specific underlying developmental, genetic, and epigenetic factors
remain elusive.
The
authors gratefully acknowledge support from the Stanley Medical Research
Institute and the NIH-Cambridge University Health Science Scholars Program.