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- W2078972824 abstract "Alterations in cholinergic functions have been reported to be associated with neuropsychiatric symptoms in dementia. Increased M1 muscarinic receptor binding in temporal cortex is associated with delusions in dementia with Lewy bodies (DLB) patients and increased M2/M4 receptor binding with psychosis in Alzheimer's disease. However, the relation between M2 and M4 muscarinic receptor and psychotic symptoms in DLB is unknown. The aim of this study was to measure M2 and M4 receptors in the anterior cingulate cortex in DLB and to correlate the neurochemical findings with neuropsychiatric symptoms. Muscarinic M2 and M4 receptor levels in the anterior cingulate cortex and adjacent cortex (Brodmann's area [BA] 32) were measured separately by using a radioligand binding protocol based on binding of [(3)H]AF-DX 384 in the presence and absence of dicyclomine, a potent M4 receptor antagonist. M2 receptor binding was significantly increased, while M4 receptor binding was unchanged in the cingulate cortex and BA32 of DLB patients compared with age-matched controls. Impaired consciousness was significantly associated with increased M4 binding and delusions were significantly associated with increased M2 binding. Increased M2 and M4 receptor binding in DLB was also associated with visual hallucinations. Upregulation of M2 and M4 muscarinic receptors in cingulate and adjacent cortex may thus contribute to the development of psychosis in DLB, with potential implications for treatments with drugs acting on these receptors." @default.
- W2078972824 created "2016-06-24" @default.
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- W2078972824 date "2005-06-01" @default.
- W2078972824 modified "2023-09-26" @default.
- W2078972824 title "Muscarinic M2 and M4 receptors in anterior cingulate cortex: relation to neuropsychiatric symptoms in dementia with Lewy bodies" @default.
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- W2078972824 doi "https://doi.org/10.1016/j.bbr.2005.02.019" @default.
- W2078972824 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15922057" @default.
- W2078972824 hasPublicationYear "2005" @default.
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