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Brain Res. 1982 Jan 28;232(1):129-39.

Muscarinic binding and choline acetyltransferase activity in Parkinsonian subjects with reference to dementia.


[3H]Quinuclidinylbenzilate ([3H]QNB) binding and choline acetyltransferase (CAT) activity were studied in post-mortem brains from control and Parkinsonian subjects. CAT levels were reduced in the cortex and hippocampus of Parkinsonians. The apparent affinity of [3H]QNB for the muscarinic receptor was higher in both the caudate nucleus and the frontal cortex. Receptor density increased only in the frontal cortex. These changes are discussed in relation to dementia and mental disturbances following anticholinergic treatment frequently observed in Parkinson's disease.

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