Evidence map›Paper›PMID 31649329›Full record

ArticleCell research2020

Initiation of Parkinson's disease from gut to brain by δ-secretase.

Eun Hee Ahn, Seong Su Kang, Xia Liu, Guiqin Chen, Zhentao Zhang, Bindu Chandrasekharan, Ashfaqul M Alam, Andrew S Neish, Xuebing Cao, Keqiang Ye

Open access · bronzeAbstract read
In one paragraph

Article in Cell research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 4 pooled it
6.1field-weighted citation impact, top 3% 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

68 citing papers in PubMed, 4 syntheses or guidelines pooled it, 102 citations in OpenAlex.

  1. Enteric Nervous System Damage by Food Contaminants: A Pathway to Neurodegeneration?Comprehensive reviews in food science and food safety · 2026
    Pooled it
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  10. Converging pathologies in neurodegeneration: the mechanistic interplay between α-Synuclein and Tau in Alzheimer's and Parkinson's.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Review
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8 more citing papers are in PubMed but not listed here.

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 3 institutions in 2 countries.

Eun Hee Ahn *Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.
Seong Su Kang *Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.
Xia LiuDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.
Guiqin ChenDepartment of Neurology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China.
Zhentao ZhangDepartment of Neurology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China.
Bindu ChandrasekharanDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.
Ashfaqul M AlamDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.
Andrew S NeishDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.
Xuebing CaoDepartment of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China. caoxuebing@126.com.
Keqiang YeDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA. kye@emory.edu.ORCID http://orcid.org/0000-0002-7657-8154
Emory University · USWuhan University · CNUnion Hospital · CN

Funding

Implementing a Maternal health and PRegnancy Outcomes Vision for Everyone (IMPROVE)UL1TR002378 · NCATS · EMORY UNIVERSITY · PI Andres J Garcia, Elizabeth O. Ofili · 2017 to 2026
$92.1M
Molecular Regulation of AEP during AgeingRF1AG051538 · NIA · EMORY UNIVERSITY · PI YE, KEQIANG · 2016 to 2016
$3.4M
NCATS NIH HHS UL1 TR002378NIA NIH HHS RF1 AG051538
6 · The paper itself

Abstract

Lewy pathology, composed of α-Synuclein (α-Syn) inclusions, a hallmark of Parkinson's disease (PD), progressively spreads from the enteric nervous system (ENS) to the central nervous system (CNS). However, it remains unclear how this process is regulated at a molecular level. Here we show that δ-secretase (asparagine endopeptidase, AEP) cleaves both α-Syn at N103 and Tau at N368, and mediates their fibrillization and retrograde propagation from the gut to the brain, triggering nigra dopaminergic neuronal loss associated with Lewy bodies and motor dysfunction. α-Syn N103 and Tau N368 robustly interact with each other and are highly elevated in PD patients' gut and brain. Chronic oral administration of the neurotoxin rotenone induces AEP activation and α-Syn N103/Tau N368 complex formation in the gut, eliciting constipation and dopaminergic neuronal death in an AEP-dependent manner. Preformed fibrils (PFFs) of α-Syn N103/Tau N368 are more neurotoxic and compact, and aggregate more quickly along the vagus nerve than their FL/FL counterparts or the individual fragments' fibrils. Colonic injection of PFFs induces PD pathologies, motor dysfunctions, and cognitive impairments. Thus, δ-secretase plays a crucial role in initiating PD pathology progression from the ENS to the CNS.

Indexed as

alpha-SynucleinAnimalsAsparaginyl EndopeptidaseBrainBrain StemCell LineCells, CulturedColonCysteine EndopeptidasesGastrointestinal TractHumansMiceNeurofibrillary TanglesParkinson DiseasePhosphorylationRatsalpha-SynucleinAsparaginyl EndopeptidaseCysteine EndopeptidasesRotenoneSNCA protein, humantau Proteins

Identifiers

PMID31649329
PMCPMC6951265
OpenAlexW2982059485

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.