Alterations of muscarinic and GABA receptor binding in the posterior cingulate cortex in schizophrenia

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dc.contributor.authorNewell, KAen_AU
dc.contributor.authorZavitsanou, Ken_AU
dc.contributor.authorJew, SKen_AU
dc.contributor.authorHuang, XFen_AU
dc.date.accessioned2014-03-07T04:19:10Zen_AU
dc.date.available2014-03-07T04:19:10Zen_AU
dc.date.issued2007-01-30en_AU
dc.date.statistics2014-03-07en_AU
dc.description.abstractThe posterior cingulate cortex (PCC), a key component of the limbic system, has been implicated in the pathology of schizophrenia because of its sensitivity to NMDA receptor antagonists. Recent studies have shown that the PCC is dysfunctional in schizophrenia, and it is now suspected to be critically involved in the pathogenesis of schizophrenia. Studies also suggest that there are abnormalities in muscarinic and GABAergic neurotransmission in schizophrenia. Therefore, in the present study we used quantitative autoradiography to investigate the binding of [3H]pirenzepine, [3H]AF-DX 384 and [3H]muscimol, which respectively label M1/4 and M2/4 muscarinic and GABAA receptors, in the PCC of schizophrenia and control subjects matched for age and post-mortem interval. The present study found that [3H]pirenzepine binding was significantly decreased in the superficial (− 24%, p = 0.002) and deep (− 35%, p < 0.001) layers of the PCC in the schizophrenia group as compared with the control group. In contrast, a dramatic increase in [3H]muscimol binding was observed in the superficial (+ 112%, p = 0.001) and deep layers (+ 100%, p = 0.017) of the PCC in the schizophrenia group. No difference was observed for [3H]AF-DX 384 binding between the schizophrenia and control groups. The authors found a significant inverse correlation between [3H]pirenzepine binding in the deep cortical layers and [3H]muscimol binding in the superficial layers (rho = − 0.732, p = 0.003). In addition, negative correlations were also found between age and [3H]pirenzepine binding in both superficial and deep cortical layers (rho = − 0.669 p = 0.049 and rho = − 0.778, p = 0.014), and between age of schizophrenia onset and [3H]AF-DX 384 binding (rho = − 0.798, p = 0.018). These results for the first time demonstrated the status of M1/M4, M2/M4 and GABAA receptors in the PCC in schizophrenia. Whilst the exact mechanism causing these alterations is not yet known, a possible increased acetylcholine and down regulated GABA stimulation in the PCC of schizophrenia is suggested. © 2007, Elsevieren_AU
dc.identifier.citationNewell, K., Zavitsanou, K., Jew, S. K., & Huang, X. F. (2007). Alterations in muscarinic and GABA receptors in the posterior cingulate cortex in schizophrenia. Progress in Neuro-Psychopharmacology & Biological Psychiatry, 31(1), 225-233. doi:10.1016/j.pnpbp.2006.07.004en_AU
dc.identifier.govdoc4533en_AU
dc.identifier.issn0278-5846en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleProgress in Neuro-Psychopharmacology & Biological Psychiatryen_AU
dc.identifier.pagination225-233en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.pnpbp.2006.07.004en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5248en_AU
dc.identifier.volume31en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectBrainen_AU
dc.subjectCerebral cortexen_AU
dc.subjectDopamineen_AU
dc.subjectRatsen_AU
dc.subjectReceptorsen_AU
dc.subjectAutoradiographyen_AU
dc.titleAlterations of muscarinic and GABA receptor binding in the posterior cingulate cortex in schizophreniaen_AU
dc.typeJournal Articleen_AU
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