PERFORM Publications

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Title		Authors	PubMed ID
1	Functional analysis of the protocatechuate branch of the β-ketoadipate pathway in Aspergillus niger	Sgro M; Chow N; Olyaei F; Arentshorst M; Geoffrion N; Ram AFJ; Powlowski J; Tsang A;	37399977 BIOLOGY
2	TRAPPC11-related muscular dystrophy with hypoglycosylation of alpha-dystroglycan in skeletal muscle and brain	Munot P; McCrea N; Torelli S; Manzur A; Sewry C; Chambers D; Feng L; Ala P; Zaharieva I; Ragge N; Roper H; Marton T; Cox P; Milev MP; Liang WC; Maruyama S; Nishino I; Sacher M; Phadke R; Muntoni F;	34648194 BIOLOGY
3	Chronic Neuroleptic-Induced Parkinsonism Examined with Positron Emission Tomography.	Galoppin M, Berroir P, Soucy JP, Suzuki Y, Lavigne GJ, Gagnon JF, Montplaisir JY, Stip E, Blanchet PJ	32353194 PERFORM
4	The non-aromatizable androgen dihydrotestosterone (DHT) facilitates sexual behavior in ovariectomized female rats primed with estradiol.	Maseroli E, Santangelo A, Lara-Fontes B, Quintana GR, Mac Cionnaith CE, Casarrubea M, Ricca V, Maggi M, Vignozzi L, Pfaus JG	32087523 PSYCHOLOGY
5	Angiotensin-I-Converting Enzyme Inhibitory Activity of Coumarins from Angelica decursiva.	Ali MY, Seong SH, Jung HA, Choi JS	31683604 CHEMBIOCHEM
6	Heterosynaptic modulation of evoked synaptic potentials in layer II of the entorhinal cortex by activation of the parasubiculum.	Sparks DW, Chapman CA	27146979 PSYCHOLOGY
7	Mining Enzyme Diversity of Transcriptome Libraries through DNA Synthesis for Benzylisoquinoline Alkaloid Pathway Optimization in Yeast.	Narcross L, Bourgeois L, Fossati E, Burton E, Martin VJ	27442619 BIOLOGY

Title:	Chronic Neuroleptic-Induced Parkinsonism Examined with Positron Emission Tomography.
Authors:	Galoppin M, Berroir P, Soucy JP, Suzuki Y, Lavigne GJ, Gagnon JF, Montplaisir JY, Stip E, Blanchet PJ
Link:	https://www.ncbi.nlm.nih.gov/pubmed/32353194?dopt=Abstract
DOI:	10.1002/mds.28046
Publication:	Movement disorders : official journal of the Movement Disorder Society
Keywords:	antipsychotic drugs; dihydrotetrabenazine; positron emission tomography; raclopride; striatum;
PMID:	32353194	Category:	Mov Disord	Date Added:	2020-05-01
Dept Affiliation:	PERFORM 1 Department of Medicine, University of Montreal Hospital Center, Montreal, Canada. 2 PERFORM Centre, Concordia University, Montreal, Canada. 3 McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, Canada. 4 Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan. 5 Centre for Advanced Research in Sleep Medicine, Hopital du Sacre-Coeur de Montreal, Montreal, Canada. 6 Faculty of Dental Medicine, University of Montreal, Montreal, Canada. 7 Department of Psychiatry, United Arab Emirates University, Al Ain, United Arab Emirates. 8 Montreal Mental Health University Institute, Montreal, Canada.

Description:

Chronic Neuroleptic-Induced Parkinsonism Examined with Positron Emission Tomography.

Mov Disord. 2020 Apr 30;:

Authors: Galoppin M, Berroir P, Soucy JP, Suzuki Y, Lavigne GJ, Gagnon JF, Montplaisir JY, Stip E, Blanchet PJ

Abstract

BACKGROUND: Neuroleptic drug-induced parkinsonism (NIP) is a leading cause of parkinsonism, particularly in aging. Based on abnormal dopamine transporter scan results, individuals displaying chronic NIP are often diagnosed with Lewy-body Parkinson's disease (PD), but this assumption needs further substantiation.

OBJECTIVE: To quantitate the profile of striatal dopaminergic nerve terminal density in NIP relative to PD.

METHODS: We used the positron emission tomography ligand [11 C](+)-dihydrotetrabenazine targeting vesicular monoamine transporter type 2 (VMAT2) binding sites and collected various clinical parameters (motor ratings, olfaction, polysomnography to document rapid eye movement sleep muscle activity, quantitative sensory testing for pain thresholds) possibly predicting binding results in patients older than age 50 living with schizophrenia spectrum disorders under long-term stable antipsychotic drug treatment, with (N = 11) or without (N = 11) chart documention of chronic NIP, and compared them to healthy volunteers (N = 11) and others medicated for PD (N = 12).

RESULTS: Striatal VMAT2 binding was dichotomous in the NIP group between those with spared (N = 5) or low (N = 6) PD-like values. Striatal binding reduction in the low VMAT2-NIP group was asymmetric without the gradient of maximal involvement in the posterior putamen typical of PD. Anosmia was the only nonmotor parameter measured matching the abnormal striatal VMAT2 binding status.

CONCLUSION: These preliminary observations suggest that striatal VMAT2 binding is abnormal in a fraction of chronic NIP cases and differs in spatial distribution from PD. The possibility of a drug-induced axonopathy and resultant synaptopathy, as well as the evolution of the binding deficit, warrant further longitudinal studies in a large cohort. © 2020 International Parkinson and Movement Disorder Society.

PMID: 32353194 [PubMed - as supplied by publisher]

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