Objective It is unclear whether the decline in dopamine transporters (DAT) differs among idiopathic rapid eye movement sleep behavior disorder (iRBD) patients with different levels of olfactory impairment. This study aimed to characterize DAT changes in relation to nonmotor features in iRBD patients by olfactory loss.
Methods This prospective cohort study consisted of three age-matched groups: 30 polysomnography-confirmed iRBD patients, 30 drug-naïve Parkinson’s disease patients, and 19 healthy controls without olfactory impairment. The iRBD group was divided into two groups based on olfactory testing results. Participants were evaluated for reported prodromal markers and then underwent 18F-FP-CIT positron emission tomography and 3T MRI. Tracer uptakes were analyzed in the caudate, anterior and posterior putamen, substantia nigra, and raphe nuclei.
Results Olfactory impairment was defined in 38.5% of iRBD patients. Mild parkinsonian signs and cognitive functions were not different between the two iRBD subgroups; however, additional prodromal features, constipation, and urinary and sexual dysfunctions were found in iRBD patients with olfactory impairment but not in those without. Tracer uptake showed significant group differences in all brain regions, except the raphe nuclei. The iRBD patients with olfactory impairment had uptake reductions in the anterior and posterior putamen, caudate, and substantia nigra (p < 0.016 in all, adjusted for age), which ranged from 0.6 to 0.8 of age-normative values. In contrast, those without olfactory impairment had insignificant changes in all regions ranging above 0.8.
Conclusion There was a clear distinction in DAT loss and nonmotor profiles by olfactory status in iRBD.
Citations
Citations to this article as recorded by
Neuropsychological Changes in Isolated REM Sleep Behavior Disorder: A Systematic Review and Meta-analysis of Cross-sectional and Longitudinal Studies Caterina Leitner, Giada D’Este, Laura Verga, Shady Rahayel, Samantha Mombelli, Marco Sforza, Francesca Casoni, Marco Zucconi, Luigi Ferini-Strambi, Andrea Galbiati Neuropsychology Review.2024; 34(1): 41. CrossRef
Dopamine transporter positron emission tomography in patients with Alzheimer’s disease with Lewy body disease features Sungwoo Kang, Seun Jeon, Young-gun Lee, Byoung Seok Ye Neurobiology of Aging.2024; 134: 57. CrossRef
Imaging Procedure and Clinical Studies of [18F]FP-CIT PET Changhwan Sung, Seung Jun Oh, Jae Seung Kim Nuclear Medicine and Molecular Imaging.2024; 58(4): 185. CrossRef
Validation of the REM behaviour disorder phenoconversion-related pattern in an independent cohort Beatrice Orso, Pietro Mattioli, Eun-Jin Yoon, Yu Kyeong Kim, Heejung Kim, Jung Hwan Shin, Ryul Kim, Claudio Liguori, Francesco Famà, Andrea Donniaquio, Federico Massa, David Vállez García, Sanne K. Meles, Klaus L. Leenders, Agostino Chiaravalloti, Matteo Neurological Sciences.2023; 44(9): 3161. CrossRef
Neurofilament light chain and cardiac MIBG uptake as predictors for phenoconversion in isolated REM sleep behavior disorder Don Gueu Park, Ju Yeong Kim, Min Seung Kim, Mi Hee Kim, Young-Sil An, Jaerak Chang, Jung Han Yoon Journal of Neurology.2023; 270(9): 4393. CrossRef
Longitudinal evolution of cortical thickness signature reflecting Lewy body dementia in isolated REM sleep behavior disorder: a prospective cohort study Jung Hwan Shin, Heejung Kim, Yu Kyeong Kim, Eun Jin Yoon, Hyunwoo Nam, Beomseok Jeon, Jee-Young Lee Translational Neurodegeneration.2023;[Epub] CrossRef
Brain olfactory‐related atrophy in isolated rapid eye movement sleep behavior disorder Kyung Ah Woo, Heejung Kim, Eun Jin Yoon, Jung Hwan Shin, Hyunwoo Nam, Beomseok Jeon, Yu Kyeong Kim, Jee‐Young Lee Annals of Clinical and Translational Neurology.2023; 10(12): 2192. CrossRef
Monoaminergic Degeneration and Ocular Motor Abnormalities in De Novo Parkinson's Disease Kyung Ah Woo, Joo Hong Joun, Eun Jin Yoon, Chan Young Lee, Beomseok Jeon, Yu Kyeong Kim, Jee‐Young Lee Movement Disorders.2023; 38(12): 2291. CrossRef
Altered cerebral perfusion and microstructure in advanced Parkinson’s disease and their associations with clinical features Zhaoxi Liu, Yiwei Zhang, Han Wang, Dan Xu, Hui You, Zhentao Zuo, Feng Feng Neurological Research.2022; 44(1): 47. CrossRef
Brain Neuroimaging of Rapid Eye Movement Sleep Behavior Disorder in Parkinson’s Disease: A Systematic Review Rafail Matzaras, Kuangyu Shi, Artemios Artemiadis, Panagiotis Zis, Georgios Hadjigeorgiou, Axel Rominger, Claudio L.A. Bassetti, Panagiotis Bargiotas Journal of Parkinson's Disease.2022; 12(1): 69. CrossRef
Odor Identification by Parkinson’s Disease Patients Tested by Using Sniffin’ Sticks versus Natural Spices Florence Baert, Geertrui Vlaemynck, Jarissa Maselyne, Christophe Matthys, Seyed-Mohammad Fereshtehnejad Parkinson's Disease.2022; 2022: 1. CrossRef
Brain Metabolic Correlates of Dopaminergic Denervation in Prodromal and Early Parkinson's Disease Ryul Kim, Heejung Kim, Yu Kyeong Kim, Eun Jin Yoon, Hyun Woo Nam, Beomseok Jeon, Jee‐Young Lee Movement Disorders.2022; 37(10): 2099. CrossRef
Longitudinal Changes in Isolated Rapid Eye Movement Sleep Behavior Disorder‐Related Metabolic Pattern Expression Ryul Kim, Jee‐Young Lee, Yu Kyeong Kim, Heejung Kim, Eun Jin Yoon, Jung Hwan Shin, Dallah Yoo, Hyunwoo Nam, Beomseok Jeon Movement Disorders.2021; 36(8): 1889. CrossRef
Parkinson Disease-Related Brain Metabolic Patterns and Neurodegeneration in Isolated REM Sleep Behavior Disorder Jung Hwan Shin, Jee-Young Lee, Yu-Kyeong Kim, Eun Jin Yoon, Heejung Kim, Hyunwoo Nam, Beomseok Jeon Neurology.2021;[Epub] CrossRef
Retina Thickness as a Marker of Neurodegeneration in Prodromal Lewy Body Disease Jee‐Young Lee, Jeeyun Ahn, Sohee Oh, Joo Young Shin, Yu Kyeong Kim, Hyunwoo Nam, Beomseok Jeon Movement Disorders.2020; 35(2): 349. CrossRef
Serum TNF-α and neurodegeneration in isolated REM sleep behavior disorder Ryul Kim, Jee-Young Lee, Han-Joon Kim, Yu Kyeong Kim, Hyunwoo Nam, Beomseok Jeon Parkinsonism & Related Disorders.2020; 81: 1. CrossRef
Longitudinal change in dopamine transporter availability in idiopathic REM sleep behavior disorder Jung Hwan Shin, Jee-Young Lee, Yu-Kyeong Kim, Sung-A Shin, Heejung Kim, Hyunwoo Nam, Beomseok Jeon Neurology.2020;[Epub] CrossRef
The Multifocal Dural Arteriovenous Fistula Presumed to Present as a Progressive Cognitive Impairment Seunghee Na, Seung-Keun Lee, Eek-Sung Lee Dementia and Neurocognitive Disorders.2024; 23(1): 67. CrossRef
A case of Parkinson's disease with exacerbation of parkinsonism due to dural arteriovenous fistula Keito Ishihara, Hiroyuki Naito, Takeshi Hara, Tomohisa Nezu, Shiro Aoki, Daizo Ishii, Nobutaka Horie, Hirofumi Maruyama Japanese Journal of Stroke.2024;[Epub] CrossRef
Secondary parkinsonism associated with focal brain lesions Rok Berlot, Anđela Pavlović, Maja Kojović Frontiers in Neurology.2024;[Epub] CrossRef
The Sudden Onset of Pure Parkinsonism Caused by Intracranial Dural Arteriovenous Fistulas Hitoshi Kawasaki, Risa Okuda, Ryu Yokoyama, Toshimasa Yamamoto Internal Medicine.2022; 61(7): 1059. CrossRef
Reversible Parkinsonism and Rapidly Progressive Dementia Due to Dural Arteriovenous Fistula: Case Series and Literature Review Joshua Lai, Manraj K.S. Heran, A. Jon Stoessl, Peter A. Gooderham Movement Disorders Clinical Practice.2017; 4(4): 607. CrossRef
Dementia and Parkinsonism-a Rare Presentation of Intracranial Dural Arteriovenous Fistulae Manoj Gopinath, Chinmay Nagesh, K Santhosh, ER Jayadevan Neurointervention.2017; 12(2): 125. CrossRef
Straight sinus dural arteriovenous fistula presenting with reversible parkinsonism Jiali Pu, Xiaoli Si, Rong Ye, Baorong Zhang Medicine.2017; 96(49): e9005. CrossRef