Evidence map›Paper›PMID 35487930›Full record

ArticleNPJ Parkinson's disease2022

Neuroimaging evidence of glymphatic system dysfunction in possible REM sleep behavior disorder and Parkinson's disease.

Xiaoli Si, Tao Guo, Zhiyun Wang, Yi Fang, Luyan Gu, Lanxiao Cao, Wenyi Yang, Ting Gao, Zhe Song, Jun Tian and 10 more

Abstract read
In one paragraph

Article in NPJ Parkinson's disease, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 109 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
109citing papers in PubMed, 5 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

109 citing papers in PubMed, 5 syntheses or guidelines pooled it.

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  6. Review
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  8. The glymphatic system and Parkinson's disease: a narrative review.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
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49 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

20 authors.

Xiaoli Si *Department of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Tao Guo *Department of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Zhiyun WangDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Yi FangDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Luyan GuDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Lanxiao CaoDepartment of Neurology, Fourth Affiliated Hospital, School of Medicine, Zhejiang University, N1 Avenue, 322000, Yiwu, Zhejiang, China.
Wenyi YangDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Ting GaoDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Zhe SongDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Jun TianDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Xinzhen YinDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Xiaojun GuanDepartment of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Cheng ZhouDepartment of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Jingjing WuDepartment of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Xueqin BaiDepartment of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.ORCID http://orcid.org/0000-0002-9092-7824
Xiaocao LiuDepartment of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China.
Guohua ZhaoDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China. gzhao@zju.edu.cn.ORCID http://orcid.org/0000-0003-0593-9175
Minming ZhangDepartment of Radiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China. zhangminming@zju.edu.cn.ORCID http://orcid.org/0000-0003-0145-7558
Jiali PuDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China. jialipu@zju.edu.cn.ORCID http://orcid.org/0000-0002-6719-4060
Baorong ZhangDepartment of Neurology, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, Zhejiang, China. brzhang@zju.edu.cn.ORCID http://orcid.org/0000-0002-8099-7407

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Alpha-synucleinopathy is postulated to be central to both idiopathic rapid eye movement sleep behaviour disorder (iRBD) and Parkinson's disease (PD). Growing evidence suggests an association between the diminished clearance of α-synuclein and glymphatic system dysfunction. However, evidence accumulating primarily based on clinical data to support glymphatic system dysfunction in patients with iRBD and PD is currently insufficient. This study aimed to use diffusion tensor image analysis along the perivascular space (DTI-ALPS) to evaluate glymphatic system activity and its relationship to clinical scores of disease severity in patients with possible iRBD (piRBDs) and those with PD. Further, we validated the correlation between the ALPS index and the prognosis of PD longitudinally. Overall, 168 patients with PD, 119 piRBDs, and 129 healthy controls were enroled. Among them, 50 patients with PD had been longitudinally reexamined. Patients with PD exhibited a lower ALPS index than those with piRBDs (P = 0.036), and both patient groups showed a lower ALPS index than healthy controls (P < 0.001 and P = 0.001). The ALPS index and elevated disease severity were negatively correlated in the piRBD and PD subgroups. Moreover, the ALPS index was correlated with cognitive decline in patients with PD in the longitudinal analyses. In conclusion, DTI-ALPS provided neuroimaging evidence of glymphatic system dysfunction in piRBDs and patients with PD; however, the potential of assessing the pathological progress of α-synucleinopathies as an indicator is worth verifying. Further development of imaging methods for glymphatic system function is also warranted.

Identifiers

PMID35487930
PMCPMC9055043

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.