Evidence map›Paper›PMID 25496089›Full record

SynthesisBMC medical genetics2014

Genetic associations of Nrf2-encoding NFE2L2 variants with Parkinson's disease - a multicenter study.

Malin von Otter, Petra Bergström, Aldo Quattrone, Elvira Valeria De Marco, Grazia Annesi, Peter Söderkvist, Stephanie Bezzina Wettinger, Marek Drozdzik, Monika Bialecka, Hans Nissbrandt and 5 more

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in BMC medical genetics, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

42 citing papers in PubMed, 1 synthesis or guideline pooled it, 78 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Review
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Nrf2 as a potential target for Parkinson's disease therapy.Journal of molecular medicine (Berlin, Germany) · 2021
    Review
  16. Review
  17. Article
  18. Review
  19. Review
  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

15 authors at 11 institutions in 7 countries.

Malin von Otter
Petra Bergström
Aldo Quattrone
Elvira Valeria De Marco
Grazia Annesi
Peter Söderkvist
Stephanie Bezzina Wettinger
Marek Drozdzik
Monika Bialecka
Hans Nissbrandt
Christine Klein
Michael Nilsson
Ola Hammarsten
Staffan Nilsson
Henrik Zetterberg
University of Gothenburg · SEPomeranian Medical University · PLChalmers University of Technology · SEHunter Medical Research Institute · AUInstitute of Molecular Bioimaging and Physiology · ITInstitute of Neurological Sciences · ITLinköping University · SEMagna Graecia University · ITUniversity College London · GBUniversity of Lübeck · DEUniversity of Malta · MT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe transcription factor Nrf2, encoded by the NFE2L2 gene, is an important regulator of the cellular protection against oxidative stress. Parkinson's disease is a neurodegenerative disease highly associated with oxidative stress. In a previously published study, we reported associations of NFE2L2 haplotypes with risk and age at onset of idiopathic Parkinson's disease in a Swedish discovery material and a Polish replication material. Here, we have extended the replication study and performed meta-analyses including the Polish material and four new independent European patient-control materials. Furthermore, all SNPs included in the haplotype windows were investigated individually for associations with Parkinson's disease in meta-analyses including all six materials.

methodsTotally 1038 patients and 1600 control subjects were studied. Based on previous NFE2L2 haplotype associations with Parkinson's disease, five NFE2L2 tag SNPs were genotyped by allelic discrimination and three functional NFE2L2 promoter SNPs were genotyped by sequencing. The impact of individual SNPs and haplotypes on risk and age at onset of Parkinson's disease were investigated in each material individually and in meta-analyses of the obtained results.

resultsMeta-analyses of NFE2L2 haplotypes showed association of haplotype GAGCAAAA, including the fully functional promoter haplotype AGC, with decreased risk (OR = 0.8 per allele, p = 0.012) and delayed onset (+1.1 years per allele, p = 0.048) of Parkinson's disease. These results support the previously observed protective effect of this haplotype in the first study. Further, meta-analyses of the SNPs included in the haplotypes revealed four NFE2L2 SNPs associated with age at onset of Parkinson's disease (rs7557529 G > A, -1.0 years per allele, p = 0.042; rs35652124 A > G, -1.1 years per allele, p = 0.045; rs2886161 A > G, -1.2 years per allele, p = 0.021; rs1806649 G > A, +1.2 years per allele, p = 0.029). One of these (rs35652124) is a functional SNP located in the NFE2L2 promoter. No individual SNP was associated with risk of Parkinson's disease.

conclusionOur results support the hypothesis that variation in the NFE2L2 gene, encoding a central protein in the cellular protection against oxidative stress, may contribute to the pathogenesis of Parkinson's disease. Functional studies are now needed to explore these results further.

Indexed as

Genome-Wide Association StudyPolymorphism, Single NucleotideAgedAged, 80 and overAge of OnsetAllelesCase-Control StudiesDemographyFemaleGenotyping TechniquesHaplotypesHumansMaleMiddle AgedNF-E2-Related Factor 2Oxidative StressNFE2L2 protein, humanNF-E2-Related Factor 2

Identifiers

PMID25496089
PMCPMC4335439
OpenAlexW2162624787

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.