Evidence map›Paper›PMID 33502028›Full record

ArticleAnnals of neurology2021

Heritability Enrichment Implicates Microglia in Parkinson's Disease Pathogenesis.

Maren Stolp Andersen, Sara Bandres-Ciga, Regina H Reynolds, John Hardy, Mina Ryten, Lynne Krohn, Ziv Gan-Or, Inge R Holtman, Lasse Pihlstrøm, International Parkinson's Disease Genomics Consortium

Open access · hybridAbstract read
In one paragraph

Article in Annals of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
48citing papers in PubMed, 1 pooled it
8.3field-weighted citation impact, top 2% 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

48 citing papers in PubMed, 1 synthesis or guideline pooled it, 74 citations in OpenAlex.

  1. Pooled it
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  11. The Role and Mechanisms of G protein-coupled receptors in Parkinson's disease.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Review
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  19. bioRxiv : the preprint server for biology · 2024
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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

10 authors at 6 institutions in 7 countries.

Maren Stolp AndersenDepartment of Neurology, Oslo University Hospital, Oslo, Norway.
Sara Bandres-CigaLaboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.
Regina H ReynoldsDepartment of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, London, UK.
John HardyDepartment of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, London, UK.
Mina RytenDepartment of Neurodegenerative Disease, Queen Square Institute of Neurology, University College London, London, UK.
Lynne KrohnMontreal Neurological Institute, McGill University, Montreal, Québec, Canada.ORCID 0000-0001-6554-1666
Ziv Gan-OrMontreal Neurological Institute, McGill University, Montreal, Québec, Canada.ORCID 0000-0003-0332-234X
Inge R HoltmanDepartment of Biomedical Sciences of Cells & Systems, Section Molecular Neurobiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Lasse PihlstrømDepartment of Neurology, Oslo University Hospital, Oslo, Norway.ORCID 0000-0002-7635-8645
International Parkinson's Disease Genomics Consortium
Great Ormond Street Hospital · GBMontreal Neurological Institute and Hospital · CAOslo University Hospital · NONational Institutes of Health · USQueen Mary University of London · GBUniversity Medical Center Groningen · NL

Funding

Alzheimer's Research UKIntramural NIH HHS Z99 AG999999Medical Research Council G0802462Medical Research Council MR/K01417X/1Medical Research Council MR/N008324/1Medical Research Council MR/N026004/1Wellcome Trust
6 · The paper itself

Abstract

objectiveUnderstanding how different parts of the immune system contribute to pathogenesis in Parkinson's disease is a burning challenge with important therapeutic implications. We studied enrichment of common variant heritability for Parkinson's disease stratified by immune and brain cell types.

methodsWe used summary statistics from the most recent meta-analysis of genomewide association studies in Parkinson's disease and partitioned heritability using linkage disequilibrium score regression, stratified for specific cell types, as defined by open chromatin regions. We also validated enrichment results using a polygenic risk score approach and intersected disease-associated variants with epigenetic data and expression quantitative loci to nominate and explore a putative microglial locus.

resultsWe found significant enrichment of Parkinson's disease risk heritability in open chromatin regions of microglia and monocytes. Genomic annotations overlapped substantially between these 2 cell types, and only the enrichment signal for microglia remained significant in a joint model. We present evidence suggesting P2RY12, a key microglial gene and target for the antithrombotic agent clopidogrel, as the likely driver of a significant Parkinson's disease association signal on chromosome 3.

interpretationOur results provide further support for the importance of immune mechanisms in Parkinson's disease pathogenesis, highlight microglial dysregulation as a contributing etiological factor, and nominate a targetable microglial gene candidate as a pathogenic player. Immune processes can be modulated by therapy, with potentially important clinical implications for future treatment in Parkinson's disease. ANN NEUROL 2021;89:942-951.

Indexed as

ChromatinChromosomes, Human, Pair 3ClopidogrelGenetic Predisposition to DiseaseGenome-Wide Association StudyHumansImmunity, CellularLinkage DisequilibriumMicrogliaMonocytesMultifactorial InheritanceParkinson DiseasePolymorphism, Single NucleotideReceptors, Purinergic P2Y12Risk AssessmentChromatinClopidogrelP2RY12 protein, humanReceptors, Purinergic P2Y12

Identifiers

PMID33502028
PMCPMC9017316
OpenAlexW3109706750

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.