Regional changes in the type 1 cannabinoid receptor are associated with cognitive dysfunction in Parkinson's disease.

Autor: Ceccarini J; Nuclear Medicine and Molecular Imaging, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium. jenny.ceccarini@uzleuven.be.; Department of Imaging and Pathology, KU Leuven, Leuven, Belgium. jenny.ceccarini@uzleuven.be., Casteels C; Nuclear Medicine and Molecular Imaging, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.; Department of Imaging and Pathology, KU Leuven, Leuven, Belgium., Ahmad R; Nuclear Medicine and Molecular Imaging, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.; Department of Imaging and Pathology, KU Leuven, Leuven, Belgium., Crabbé M; Nuclear Medicine and Molecular Imaging, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.; Department of Imaging and Pathology, KU Leuven, Leuven, Belgium., Van de Vliet L; Department of Old Age Psychiatry, University Psychiatric Centre, KU Leuven, Leuven, Belgium.; Department of Neurosciences, KU Leuven, Leuven, Belgium., Vanhaute H; Nuclear Medicine and Molecular Imaging, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.; Department of Imaging and Pathology, KU Leuven, Leuven, Belgium.; Department of Old Age Psychiatry, University Psychiatric Centre, KU Leuven, Leuven, Belgium., Vandenbulcke M; Department of Old Age Psychiatry, University Psychiatric Centre, KU Leuven, Leuven, Belgium.; Department of Neurosciences, KU Leuven, Leuven, Belgium., Vandenberghe W; Department of Neurosciences, KU Leuven, Leuven, Belgium.; Department of Neurology, University Hospitals Leuven, Leuven, Belgium., Van Laere K; Nuclear Medicine and Molecular Imaging, University Hospitals Leuven, Herestraat 49, 3000, Leuven, Belgium.; Department of Imaging and Pathology, KU Leuven, Leuven, Belgium.
Jazyk: angličtina
Zdroj: European journal of nuclear medicine and molecular imaging [Eur J Nucl Med Mol Imaging] 2019 Oct; Vol. 46 (11), pp. 2348-2357. Date of Electronic Publication: 2019 Jul 24.
DOI: 10.1007/s00259-019-04445-x
Abstrakt: Purpose: The endocannabinoid system plays a regulatory role in a number of physiological functions, including motor control but also mood, emotion, and cognition. A number of preclinical studies in Parkinson's disease (PD) models demonstrated that modulating the type 1 cannabinoid receptor (CB 1 R) may improve motor symptoms and components of cognitive processing. However, the relation between CB 1 R, cognitive decline and behavioral symptoms has not been investigated in PD patients so far. The aim of this study was to examine whether CB 1 R availability is associated with measures of cognitive and behavioral function in PD patients.
Methods: Thirty-eight PD patients and ten age- and gender-matched controls underwent a [ 18 F]MK-9470 PET scan to assess CB 1 R availability, as well as volumetric MR imaging. Neuropsychological symptoms were evaluated using an extensive cognitive and behavioral battery covering the five cognitive domains, depression, anxiety, apathy, and psychiatric complications, and were correlated to CB 1 R availability using vowel-wise regression analysis (P < 0.05, corrected for familywise error).
Results: PD patients with poorer performance in episodic memory, executive functioning, speed and mental flexibility (range P 0.003-0.03) showed lower CB 1 R availability in predominantly the midcingulate cortex and middle to superior frontal gyrus (T peak-level > 4.0). Also, PD patients with more severe visuospatial dysfunction showed decreased CB 1 R availability in the precuneus, midcingulate, supplementary motor cortex, inferior orbitofrontal gyrus and thalamus (T peak-level = 5.5). These correlations were not related to cortical gray matter atrophy. No relationship was found between CB 1 R availability and mood or behavioral symptom scores.
Conclusions: Decreased CB 1 R availability in the prefrontal and midcingulate cortex in PD patients is strongly correlated with disturbances in executive functioning, episodic memory, and visuospatial functioning. Further investigation of regional CB1R expression in groups of PD patients with mild cognitive impairment or dementia is warranted in order to further investigate the role of CB1R expression in different levels of cognitive impairment in PD.
Databáze: MEDLINE
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