Enzymes in the glutamate-glutamine cycle in the anterior cingulate cortex in postmortem brain of subjects with autism

Accumulating evidence suggests that dysfunction in the glutamatergic system may underlie the pathophysiology of autism. The anterior cingulate cortex (ACC) has been implicated in autism as well as in glutamatergic neurotransmission. We hypothesized that alterations in the glutamate-glutamine cycle i...

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Bibliographic Details
Published in:Molecular autism 2013-03, Vol.4 (1), p.6-6, Article 6
Main Authors: Shimmura, Chie, Suzuki, Katsuaki, Iwata, Yasuhide, Tsuchiya, Kenji J, Ohno, Koji, Matsuzaki, Hideo, Iwata, Keiko, Kameno, Yosuke, Takahashi, Taro, Wakuda, Tomoyasu, Nakamura, Kazuhiko, Hashimoto, Kenji, Mori, Norio
Format: Article
Language:English
Subjects:
Anterior cingulate cortex
Autism
Brain
Glutamate
Glutamine
Ligases
Liver
Neural transmission
Oxidoreductases
Physiological aspects
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Summary:Accumulating evidence suggests that dysfunction in the glutamatergic system may underlie the pathophysiology of autism. The anterior cingulate cortex (ACC) has been implicated in autism as well as in glutamatergic neurotransmission. We hypothesized that alterations in the glutamate-glutamine cycle in the ACC might play a role in the pathophysiology of autism. We performed Western blot analyses for the protein expression levels of enzymes in the glutamate-glutamine cycle, including glutamine synthetase, kidney-type glutaminase, liver-type glutaminase, and glutamate dehydrogenases 1 and 2, in the ACC of postmortem brain of individuals with autism (n = 7) and control subjects (n = 13). We found that the protein levels of kidney-type glutaminase, but not those of the other enzymes measured, in the ACC were significantly lower in subjects with autism than in controls. The results suggest that reduced expression of kidney-type glutaminase may account for putative alterations in glutamatergic neurotransmission in the ACC in autism.
ISSN:2040-2392
2040-2392
DOI:10.1186/2040-2392-4-6