Evidence map›Paper›PMID 34260075›Full record

ArticleThe EMBO journal2021

Gut inflammation triggers C/EBPβ/δ-secretase-dependent gut-to-brain propagation of Aβ and Tau fibrils in Alzheimer's disease.

Chun Chen, Yunzhe Zhou, Hualong Wang, Ashfaqul Alam, Seong Su Kang, Eun Hee Ahn, Xia Liu, Jianping Jia, Keqiang Ye

Open access · bronzeAbstract read
In one paragraph

Article in The EMBO journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
74citing papers in PubMed, 1 pooled it
10.4field-weighted citation impact, top 1% 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

74 citing papers in PubMed, 1 synthesis or guideline pooled it, 126 citations in OpenAlex.

  1. Pooled it
  2. The microbiota-proteostasis axis: implications in neurodegenerative diseases.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2026
    Review
  3. Article
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  6. Review
  7. Article
  8. Review
  9. Tuft Cells in the Gut Limit Cognitive Disorders by Regulating Gut Homeostasis.Cellular and molecular gastroenterology and hepatology · 2026
    Article
  10. Microbiota-Gut-Brain Axis in Neurodegenerative Diseases: The Role of Bacterial Amyloids.Cellular and molecular gastroenterology and hepatology · 2026
    Review
  11. Review
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  14. Article
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  18. Article
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14 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

9 authors at 4 institutions in 2 countries.

Chun ChenDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA.ORCID 0000-0003-3041-3263
Yunzhe ZhouInnovation Center for Neurological Disorders, Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.ORCID 0000-0002-5482-5767
Hualong WangDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA.
Ashfaqul AlamDepartment of Neurology, The First Hospital of Hebei Medical University, Brain Aging and Cognitive Neuroscience Laboratory of Heibei Province, Shijiazhuang, China.
Seong Su KangDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA.
Eun Hee AhnDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA.ORCID 0000-0002-1833-6720
Xia LiuDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA.
Jianping JiaInnovation Center for Neurological Disorders, Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.ORCID 0000-0002-1829-7776
Keqiang YeDepartment of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, USA.ORCID 0000-0002-7657-8154
Emory University · USCapital Medical University · CNHebei Medical University · CNUniversity of Kentucky · US

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
The Goizueta Alzheimer's Disease Research CenterP30AG066511 · NIA · EMORY UNIVERSITY · PI Amy D Rodriguez · 2020 to 2026
$29.0M
Understanding the role of anti-apolipoprotein A-I antibodies in atherosclerotic cardiovascular diseaseP20GM130456 · NIGMS · UNIVERSITY OF KENTUCKY · PI M. Ashfaqul Alam · 2020 to 2026
$18.7M
ENNCF - Viral Vector CoreP30NS055077 · NINDS · EMORY UNIVERSITY · PI LEVEY, ALLAN I · 2008 to 2018
$6.8M
Molecular Regulation of AEP during AgeingRF1AG051538 · NIA · EMORY UNIVERSITY · PI YE, KEQIANG · 2016 to 2016
$3.4M
Mechanisms underlying selective vulnerability of locus coeruleus neurons in Alzheimer's diseaseRF1AG061175 · NIA · EMORY UNIVERSITY · PI KANG, SEONG SU, WEINSHENKER, DAVID · 2019 to 2019
$2.8M
NCATS NIH HHS UL1 TR002378NIA NIH HHS P30 AG066511NIA NIH HHS RF1 AG051538NIA NIH HHS RF1 AG061175NIGMS NIH HHS P20 GM130456NINDS NIH HHS P30 NS055077
6 · The paper itself

Abstract

Inflammation plays an important role in the pathogenesis of Alzheimer's disease (AD). Some evidence suggests that misfolded protein aggregates found in AD brains may have originated from the gut, but the mechanism underlying this phenomenon is not fully understood. C/EBPβ/δ-secretase signaling in the colon was investigated in a 3xTg AD mouse model in an age-dependent manner. We applied chronic administration of 1% dextran sodium sulfate (DSS) to trigger gut leakage or colonic injection of Aβ or Tau fibrils or AD patient brain lysates in 3xTg mice and combined it with excision/cutting of the gut-brain connecting vagus nerve (vagotomy), in order to explore the role of the gut-brain axis in the development of AD-like pathologies and to monitor C/EBPβ/δ-secretase signaling under those conditions. We found that C/EBPβ/δ-secretase signaling is temporally activated in the gut of AD patients and 3xTg mice, initiating formation of Aβ and Tau fibrils that spread to the brain. DSS treatment promotes gut leakage and facilitates AD-like pathologies in both the gut and the brain of 3xTg mice in a C/EBPβ/δ-secretase-dependent manner. Vagotomy selectively blunts this signaling, attenuates Aβ and Tau pathologies, and restores learning and memory. Aβ or Tau fibrils or AD patient brain lysates injected into the colon propagate from the gut into the brain via the vagus nerve, triggering AD pathology and cognitive dysfunction. The results indicate that inflammation activates C/EBPβ/δ-secretase and initiates AD-associated pathologies in the gut, which are subsequently transmitted to the brain via the vagus nerve.

Indexed as

Alzheimer DiseaseAmyloid beta-PeptidesAmyloid Precursor Protein SecretasesAnimalsAsparaginyl EndopeptidaseBrainCCAAT-Enhancer-Binding ProteinsColitisColonCysteine EndopeptidasesMiceMice, Inbred C57BLtau ProteinsAmyloid beta-PeptidesAmyloid Precursor Protein SecretasesAsparaginyl EndopeptidaseCCAAT-Enhancer-Binding ProteinsCysteine Endopeptidasestau ProteinsAlzheimer’s diseaseC/EBPβfibrilsinflammationδ-secretase

Identifiers

PMID34260075
PMCPMC8408610
OpenAlexW3179732585

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.