Session Information
Date: Monday, June 20, 2016
Session Title: Parkinsonism, MSA, PSP (secondary and parkinsonism-plus)
Session Time: 12:30pm-2:00pm
Location: Exhibit Hall located in Hall B, Level 2
Objective: To measure muscarinic M2 and M4 receptors in the basal ganglia in PSP.
Background: Progressive supranuclear palsy is a nuerodegenerative Parkinson’s plus syndrome. This relates, in part, to a lack of knowledge of the underlying neurochemical abnormalities, including cholinergic receptor status in the basal ganglia.
Methods: The muscarinic M2 (presynaptic) and M4 (postsynaptic) receptors in the striatum, pallidum and adjacent insular cortex were autoradiographically measured in pathologically confirmed cases of PSP (n = 42), and compared with cases of controls (n = 50).
Results: In cases of PSP, there was a reduction in M2 and M4 receptors in the posterior caudate and putamen compared to controls, but no significant changes in the pallidum. Cases with AD showed lower M2 receptors in the posterior striatum. Groups with LBD and AD showed higher M2 binding in the insular cortex compared with controls.
Conclusions: The results suggest loss of posterior striatal cholinergic interneurones in PSP, and reduction in medium spiny projection neurones bearing M4 receptors. These results should be taken in the context of more widespread pathology in PSP, but may have implications for future trials of cholinergic treatments.
To cite this abstract in AMA style:
B. Muinjonov, E. Giyaziddinova, G. Rakhimbaeva. The basal ganglia muscarine receptors impairment in progressive supranuclear palsy [abstract]. Mov Disord. 2016; 31 (suppl 2). https://www.mdsabstracts.org/abstract/the-basal-ganglia-muscarine-receptors-impairment-in-progressive-supranuclear-palsy/. Accessed July 13, 2025.« Back to 2016 International Congress
MDS Abstracts - https://www.mdsabstracts.org/abstract/the-basal-ganglia-muscarine-receptors-impairment-in-progressive-supranuclear-palsy/