Cognitive and Brain Metabolism Profiles of Mild Cognitive Impairment in Prodromal Alpha-Synucleinopathy.

Autor:	Mattioli P; Department of Neuroscience, University of Genoa, Genoa, Italy., Pardini M; Department of Neuroscience, University of Genoa, Genoa, Italy.; IRCCS Ospedale Policlinico San Martino, Genoa, Italy., Girtler N; Department of Neuroscience, University of Genoa, Genoa, Italy.; Clinical Psychology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy., Brugnolo A; Department of Neuroscience, University of Genoa, Genoa, Italy.; Clinical Psychology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy., Orso B; Department of Neuroscience, University of Genoa, Genoa, Italy., Donniaquio A; Department of Neuroscience, University of Genoa, Genoa, Italy., Calizzano F; Department of Neuroscience, University of Genoa, Genoa, Italy., Mancini R; Department of Neuroscience, University of Genoa, Genoa, Italy., Massa F; Department of Neuroscience, University of Genoa, Genoa, Italy., Terzaghi M; Unit of Sleep Medicine and Epilepsy, IRCCS Mondino Foundation, Pavia, Italy.; Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy., Bauckneht M; IRCCS Ospedale Policlinico San Martino, Genoa, Italy.; Nuclear Medicine Unit, Department of Health Sciences, University of Genoa, Genoa, Italy., Morbelli S; IRCCS Ospedale Policlinico San Martino, Genoa, Italy.; Nuclear Medicine Unit, Department of Health Sciences, University of Genoa, Genoa, Italy., Sambuceti G; IRCCS Ospedale Policlinico San Martino, Genoa, Italy.; Nuclear Medicine Unit, Department of Health Sciences, University of Genoa, Genoa, Italy., Nobili F; Department of Neuroscience, University of Genoa, Genoa, Italy.; IRCCS Ospedale Policlinico San Martino, Genoa, Italy., Arnaldi D; Department of Neuroscience, University of Genoa, Genoa, Italy.; IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
Jazyk:	angličtina
Zdroj:	Journal of Alzheimer's disease : JAD [J Alzheimers Dis] 2022; Vol. 90 (1), pp. 433-444.
DOI:	10.3233/JAD-220653
Abstrakt:	Background: Mild cognitive impairment (MCI) is a heterogeneous condition. Idiopathic REM sleep behavior disorder (iRBD) can be associated with MCI (MCI-RBD). Objective: To investigate neuropsychological and brain metabolism features of patients with MCI-RBD by comparison with matched MCI-AD patients. To explore their predictive value toward conversion to a full-blown neurodegenerative disease. Methods: Seventeen MCI-RBD patients (73.6±6.5 years) were enrolled. Thirty-four patients with MCI-AD were matched for age (74.8±4.4 years), Mini-Mental State Exam score and education with a case-control criterion. All patients underwent a neuropsychological assessment and brain 18F-FDG-PET. Images were compared between groups to identify hypometabolic volumes of interest (MCI-RBD-VOI and MCI-AD-VOI). The dependency of whole-brain scaled metabolism levels in MCI-RBD-VOI and MCI-AD-VOI on neuropsychological test scores was explored with linear regression analyses in both groups, adjusting for age and education. Survival analysis was performed to investigate VOIs phenoconversion prediction power. Results: MCI-RBD group scored lower in executive functions and higher in verbal memory compared to MCI-AD group. Also, compared with MCI-AD, MCI-RBD group showed relative hypometabolism in a posterior brain area including cuneus, precuneus, and occipital regions while the inverse comparison revealed relative hypometabolism in the hippocampus/parahippocampal areas in MCI-AD group. MCI-RBD-VOI metabolism directly correlated with executive functions in MCI-RBD (p = 0.04). MCI-AD-VOI metabolism directly correlated with verbal memory in MCI-AD (p = 0.001). MCI-RBD-VOI metabolism predicted (p = 0.03) phenoconversion to an alpha-synucleinopathy. MCI-AD-VOI metabolism showed a trend (p = 0.07) in predicting phenoconversion to dementia. Conclusion: MCI-RBD and MCI-AD showed distinct neuropsychological and brain metabolism profiles, that may be helpful for both diagnosis and prognosis purposes.
Databáze:	MEDLINE
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