Evidence map›Paper›PMID 29075830›Full record

ArticleEuropean journal of nuclear medicine and molecular imaging2018

Presynaptic dopamine depletion determines the timing of levodopa-induced dyskinesia onset in Parkinson's disease.

Han Soo Yoo, Seok Jong Chung, Su Jin Chung, Hyojeong Moon, Jung Su Oh, Jae Seung Kim, Jin Yong Hong, Byoung Seok Ye, Young Ho Sohn, Phil Hyu Lee

Open access · greenAbstract read
PubMed Publisher
In one paragraph

Article in European journal of nuclear medicine and molecular imaging, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
2.8field-weighted citation impact, top 9% of its field
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

23 citing papers in PubMed, 34 citations in OpenAlex.

  1. Spatiotemporal Progression Patterns of Striatal Dopamine Depletion and Cerebral Hypoperfusion in Parkinson's Disease.Movement disorders : official journal of the Movement Disorder Society · 2026
    Article
  2. Review
  3. Article
  4. Article
  5. Baseline [NPJ Parkinson's disease · 2025
    Article
  6. Levodopa-induced dyskinesia: brain iron deposition as a new hypothesis.Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2024
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Review
  14. Article
  15. Article
  16. Cerebellar connectivity in Parkinson's disease with levodopa-induced dyskinesia.Annals of clinical and translational neurology · 2019
    Article
  17. Article
  18. Review
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 1 country.

Han Soo YooDepartment of Neurology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
Seok Jong ChungDepartment of Neurology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
Su Jin ChungDepartment of Neurology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
Hyojeong MoonDepartment of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
Jung Su OhDepartment of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
Jae Seung KimDepartment of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
Jin Yong HongYonsei University Wonju College of Medicine, Wonju, South Korea.
Byoung Seok YeDepartment of Neurology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
Young Ho SohnDepartment of Neurology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea.
Phil Hyu LeeDepartment of Neurology, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea. phlee@yuhs.ac.
Yonsei University · KRAsan Medical Center · KRUlsan College · KRUniversity of Ulsan · KR

Funding

The Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI) HI16C1118
6 · The paper itself

Abstract

purposeReduced presynaptic dopaminergic activity plays an important role in the development of levodopa-induced dyskinesia (LID) in Parkinson's disease (PD). In this study, we investigated whether dopaminergic function in the nigrostriatal system is associated with the timing of LID onset.

methodsFrom among 412 drug-naive PD patients who underwent a dopamine transporter (DAT) PET scan during their baseline evaluation, we enrolled 65 patients who developed LID during a follow-up period of >2 years. Based on the time from PD onset, LID was classified as early, intermediate or late onset. We then compared DAT availability in the striatal subregions of the patients in the three groups.

resultsThe demographic characteristics did not differ among the three patient groups except for earlier intervention of levodopa therapy in the early LID onset group (p = 0.001). After adjusting for age at PD onset, gender, timing of levodopa therapy from PD onset, and the severity of PD motor symptoms, DAT activity in the posterior putamen was found to be significantly lower in the early LID onset group than in the late LID onset group (p = 0.017). Multivariate linear regression analysis showed that low DAT activity in the posterior putamen was significantly associated with the early appearance of LID in the early LID onset group (β = 16.039, p = 0.033).

conclusionThis study demonstrated that low DAT activity in the posterior putamen at baseline is a major risk factor for the early onset of LID in patients with PD, suggesting that the degree of presynaptic dopaminergic denervation plays an important role in determining the timing of LID onset.

Indexed as

DopamineDopamine Plasma Membrane Transport ProteinsDyskinesiasFemaleHumansLevodopaMaleMiddle AgedParkinson DiseasePositron Emission Tomography Computed TomographyPrognosisSynapsesTime FactorsTropanes2-carbomethoxy-8-(3-fluoropropyl)-3-(4-iodophenyl)tropaneDopamineDopamine Plasma Membrane Transport ProteinsLevodopaTropanesDopamine transporterLevodopa-induced dyskinesiaParkinson’s diseasePET

Identifiers

PMID29075830
OpenAlexW2766941933

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.