Evidence map›Paper›PMID 34793693›Full record

ArticleNeuron2022

Rescue of α-synuclein aggregation in Parkinson's patient neurons by synergistic enhancement of ER proteostasis and protein trafficking.

Iva Stojkovska, Willayat Y Wani, Friederike Zunke, Nandkishore R Belur, Egor A Pavlenko, Nkatha Mwenda, Karan Sharma, Laetitia Francelle, Joseph R Mazzulli

Open access · greenAbstract read
In one paragraph

Article in Neuron, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 72 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
72citing papers in PubMed, 1 pooled it
7.6field-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

72 citing papers in PubMed, 1 synthesis or guideline pooled it, 111 citations in OpenAlex.

  1. Pooled it
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  13. In Vivo Screen of Parkinson's Disease GWAS Risk Genes IdentifiesThe Journal of neuroscience : the official journal of the Society for Neuroscience · 2026
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  19. Two-Color Timestamping of Gene Expression with a Chemigenetic Reporter System.Chembiochem : a European journal of chemical biology · 2025
    Article
  20. Review

12 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 1 institution in 2 countries.

Iva StojkovskaThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Willayat Y WaniThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Friederike ZunkeThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; Department of Molecular Neurology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany.
Nandkishore R BelurThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Egor A PavlenkoThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Nkatha MwendaThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Karan SharmaThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Laetitia FrancelleThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Joseph R MazzulliThe Ken and Ruth Davee Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA. Electronic address: jmazzulli@northwestern.edu.
Northwestern University · US

Funding

The role of a-synuclein accumulation in lysosomal hydrolase trafficking and functionR01NS092823 · NINDS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI Joseph R Mazzulli · 2015 to 2026
$4.8M
Mechanisms of gene regulation and RNA processing in synucleinopathiesR01NS118824 · NINDS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI MAZZULLI, JOSEPH R · 2020 to 2024
$2.8M
Exploring the role of protein farnesylation in the regulation of SNARE protein ykt6 in synucleinopathy modelsR21NS107770 · NINDS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI MAZZULLI, JOSEPH R · 2018 to 2019
$435k
NINDS NIH HHS R01 NS092823NINDS NIH HHS R21 NS107770
6 · The paper itself

Abstract

Neurodegenerative disorders are characterized by a collapse in proteostasis, as shown by the accumulation of insoluble protein aggregates in the brain. Proteostasis involves a balance of protein synthesis, folding, trafficking, and degradation, but how aggregates perturb these pathways is unknown. Using Parkinson's disease (PD) patient midbrain cultures, we find that aggregated α-synuclein induces endoplasmic reticulum (ER) fragmentation and compromises ER protein folding capacity, leading to misfolding and aggregation of immature lysosomal β-glucocerebrosidase. Despite this, PD neurons fail to initiate the unfolded protein response, indicating perturbations in sensing or transducing protein misfolding signals in the ER. Small molecule enhancement of ER proteostasis machinery promotes β-glucocerebrosidase solubility, while simultaneous enhancement of trafficking improves ER morphology, lysosomal function, and reduces α-synuclein. Our studies suggest that aggregated α-synuclein perturbs the ability of neurons to respond to misfolded proteins in the ER, and that synergistic enhancement of multiple proteostasis branches may provide therapeutic benefit in PD.

Indexed as

alpha-SynucleinNeuronsParkinson DiseaseEndoplasmic ReticulumHumansMesencephalonProtein Aggregation, PathologicalProtein FoldingProtein TransportProteostasisalpha-Synucleinalpha-synucleinbeta-glucocerebrosidaseER stressiPSC-derived midbrain dopaminergic neuronslysosomal dysfunctionParkinson's diseaseprotein aggregation

Identifiers

PMID34793693
PMCPMC8815333
OpenAlexW3211868860

What OpenQuestion holds

Textmetadata
LicenceTDM
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.