Article (Scientific journals)
Parkinson’s disease multimodal imaging: F-DOPA PET, neuromelanin-sensitive and quantitative iron-sensitive MRI
DEPIERREUX, Frédérique; PARMENTIER, Eric; MACKELS, Laurane et al.
2021In NPJ Parkinson's Disease, p. 1-10
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Keywords :
Parkinson’s disease; quantitative magnetic resonance imaging; positron emission tomography; [18F]-DOPA; brain iron; neuromelanin
Abstract :
[en] Parkinson’s disease is a neurodegenerative synucleinopathy characterized by the degeneration of neuromelanin-containing dopaminergic neurons and deposition of iron in the substantia nigra (SN). How regional neuromelanin (NM) loss and iron accumulation within specific areas of SN relates to nigro-striatal dysfunction needs to be clarified. We measured dopaminergic function in pre- and post-commissural putamen by [18F]DOPA PET in twenty-three Parkinson’s disease (PD) patients and 23 healthy control (HC) participants in whom NM content and iron load was assessed in medial and lateral SN, respectively by neuromelanin-sensitive and quantitative R2* MRI. Data analysis consisted of voxelwise regressions testing the group effect and its interaction with NM or iron signals. In PD patients, R2* was selectively increased in left lateral SN as compared to healthy participants, suggesting a local accumulation of iron in Parkinson’s disease. By contrast, NM signal differed between PD and HC, without specific regional specificity within SN. Dopaminergic function in posterior putamen decreased as R2* increased in lateral SN, indicating that dopaminergic function impairment progresses with iron accumulation in the SN. Dopaminergic function was also positively correlated with NM signal in lateral SN, indicating that dopaminergic function impairment progresses with depigmentation in the SN. A complex relationship was detected between R2* in the lateral SN and NM signal in the medial substantia nigra. In conclusion, multimodal imaging reveals regionally-specific relationships between iron accumulation and depigmentation within the SN of Parkinson’s disease and provides in vivo insights in its neuropathology.
Research center :
GIGA CRC (Cyclotron Research Center) In vivo Imaging-Aging & Memory - ULiège
Disciplines :
Neurology
Author, co-author :
DEPIERREUX, Frédérique  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service de neurologie
PARMENTIER, Eric  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service de neurologie
MACKELS, Laurane  
Baquero Duarte, Katherine Andrea ;  Université de Liège - ULiège > GIGA
Degueldre, Christian ;  Université de Liège - ULiège > GIGA CRC In vivo Imaging - Aging & Memory
Balteau, Evelyne ;  Université de Liège - ULiège > GIGA CRC In vivo Im. - Neuroimaging, data acquisi. & proces.
SALMON, Eric  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Centre de jour interdisciplinaire des troubles de la mémoire
Phillips, Christophe  ;  Université de Liège - ULiège > GIGA CRC In vivo Im. - Neuroimaging, data acquisi. & proces.
Bahri, Mohamed Ali  ;  Université de Liège - ULiège > GIGA CRC In vivo Imaging - Aging & Memory
MAQUET, Pierre  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service de neurologie
GARRAUX, Gaëtan  ;  Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Groupe des mouvements anormaux (Movere)
Language :
English
Title :
Parkinson’s disease multimodal imaging: F-DOPA PET, neuromelanin-sensitive and quantitative iron-sensitive MRI
Alternative titles :
[fr] Imagerie multimodale dans la maladie de Parkinson: PET FDOPA, IRM quantitative sensible au fer et à la neuromélanine
Publication date :
08 July 2021
Journal title :
NPJ Parkinson's Disease
eISSN :
2373-8057
Publisher :
Nature Publishing Group, New-York, United States - New York
Pages :
1-10
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Parkinson's disease multimodal imaging
Funders :
Fonds de la Recherche Scientifique - F.R.S.-FNRS; Fonds Rahier
Available on ORBi :
since 19 July 2021

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