Evidence map›Paper›PMID 32022467›Full record

ArticleBrain and behavior2020

Gene polymorphisms and motor levodopa-induced complications in Parkinson's disease.

Małgorzata Michałowska, Małgorzata Chalimoniuk, Ewa Jówko, Iwona Przybylska, Józef Langfort, Beata Toczylowska, Anna Krygowska-Wajs, Urszula Fiszer

Open access · goldAbstract read
In one paragraph

Article in Brain and behavior, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 2 pooled it
1.2field-weighted citation impact, top 18% 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

12 citing papers in PubMed, 2 syntheses or guidelines pooled it, 22 citations in OpenAlex.

  1. Polymorphisms of the dopamine metabolic and signaling pathways are associated with susceptibility to motor levodopa-induced complications (MLIC) in Parkinson's disease: a systematic review and meta-analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
    Pooled it
  2. Association of COMT rs4680 and MAO-B rs1799836 polymorphisms with levodopa-induced dyskinesia in Parkinson's disease-a meta-analysis.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2021
    Pooled it
  3. Disruption of BDNF signalling in neuropathologies.Biochemical Society transactions · 2026
    Review
  4. Pharmacogenetics in advanced Parkinson's disease.Journal of neural transmission (Vienna, Austria : 1996) · 2025
    Review
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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

8 authors at 5 institutions in 1 country.

Małgorzata MichałowskaDepartment of Neurology and Epileptology, Centre of Postgraduate Medical Education, Orłowski Hospital, Warsaw, Poland.ORCID 0000-0002-9539-0683
Małgorzata ChalimoniukDepartment of Physical Education and Health in Biała Podlaska, Józef Piłsudski University of Physical Education in Warsaw, Biała Podlaska, Poland.
Ewa JówkoDepartment of Physical Education and Health in Biała Podlaska, Józef Piłsudski University of Physical Education in Warsaw, Biała Podlaska, Poland.
Iwona PrzybylskaDepartment of Physical Education and Health in Biała Podlaska, Józef Piłsudski University of Physical Education in Warsaw, Biała Podlaska, Poland.
Józef LangfortInstitut of Sport Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland.
Beata ToczylowskaInstitute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Warsaw, Poland.
Anna Krygowska-WajsDepartment of Neurology, Jagiellonian University, Collegium Medicum, Cracow, Poland.
Urszula FiszerDepartment of Neurology and Epileptology, Centre of Postgraduate Medical Education, Orłowski Hospital, Warsaw, Poland.
Józef Piłsudski University of Physical Education in Warsaw · PLGrochowski Hospital · PLAkademii Wychowania Fizycznego im. Jerzego Kukuczki w Katowicach · PLInstitute of Biocybernetics and Biomedical Engineering · PLJagiellonian University · PL

Funding

Centre of Postgraduate Medical Education in Warsaw (Poland) 501-1-14-16-11
6 · The paper itself

Abstract

objectiveThe aim of the study was to evaluate the association of individual and combined single-nucleotide polymorphisms in brain-derived neurotrophic factor (BDNF), dopamine transporter (DAT), and catechol-O-methyltransferase (COMT) genes with the occurrence of motor levodopa-induced complications (MLIC) in Parkinson's disease (PD). MATERIALS AND

methodsWe studied 76 patients with PD (MLIC occurred in 56.6%) and 60 controls. Allelic discrimination of rs6265 BDNF (Val66Met), rs397595 DAT (SLC6A3), and rs4680 COMT (Val158Met) genes were genotyped. Odds ratios (OR) and 95% confidence intervals (95% CI) were calculated using multinominal logistic regression. Orthogonal partial least squares (OPLS) analysis and OPLS discriminant analysis (OPLS-DA) were used to analyze qualitative genetic data.

resultsThe risk of PD in subjects with the AG BDNF genotype was increased sixfold (OR = 6.12, 95% CI = 2.88-13.02, p < .0001), and AG BDNF and AG DAT genotypes were correlated with PD in OPLS-DA (VIP > 1). There were no differences in distributions of BDNF, DAT and COMT genotypes between PD groups with and without MLIC, while OPLS model showed that genotype combination of AG BDNF, AG DAT, and GG COMT was correlated with MLIC and genotypes combination of GG BDNF, AA DAT, and AA COMT with lack of MLIC in PD patients (VIP > 1).

conclusionsOur results confirmed the association of rs6265 BDNF (Val66Met) with the risk of PD and suggest a synergic effect of rs6265 BDNF (Val66Met), rs397595 DAT (SLC6A3), and rs4680 COMT (Val158Met) polymorphisms on the occurrence of MLIC.

Indexed as

Polymorphism, Single NucleotideAdultAgedAged, 80 and overAllelesAntiparkinson AgentsBrain-Derived Neurotrophic FactorCatechol O-MethyltransferaseDopamine Plasma Membrane Transport ProteinsDyskinesia, Drug-InducedFemaleGenotypeHumansLevodopaMaleMiddle AgedAntiparkinson AgentsBDNF protein, humanBrain-Derived Neurotrophic FactorCatechol O-MethyltransferaseCOMT protein, humanDopamine Plasma Membrane Transport ProteinsLevodopaSLC6A3 protein, humanbrain-derived neurotrophic factorcatechol-O-methyltransferasedopamine transportermotor levodopa-induced complicationsParkinson's diseasesingle-nucleotide polymorphism

Identifiers

PMID32022467
PMCPMC7066344
OpenAlexW3004768058

What OpenQuestion holds

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LicenceCC BY
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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.