Evidence map›Paper›PMID 33347974›Full record

SynthesisNeurobiology of disease2021

Systematic review and meta-analysis of human transcriptomics reveals neuroinflammation, deficient energy metabolism, and proteostasis failure across neurodegeneration.

Ayush Noori, Aziz M Mezlini, Bradley T Hyman, Alberto Serrano-Pozo, Sudeshna Das

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Neurobiology of disease, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed, 2 pooled it
10.2field-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

69 citing papers in PubMed, 2 syntheses or guidelines pooled it, 90 citations in OpenAlex.

  1. Meta-Analysis of Transcriptomic Studies of Blood and Six Brain Regions Identifies a Consensus of 15 Cross-Tissue Mechanisms in Alzheimer's Disease and Suggests an Origin of Cross-Study Heterogeneity.American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics · 2025
    Pooled it
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  14. The Progress of Active Immunotherapy for Parkinson's Disease.International journal of molecular sciences · 2026
    Review
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  16. Astrocytic KFrontiers in aging neuroscience · 2026
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9 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

5 authors at 2 institutions in 1 country.

Ayush NooriHarvard College, Cambridge, MA 02138, United States of America; Department of Neurology, Massachusetts General Hospital, Boston, MA 02114, United States of America; MIND Data Science Lab, Cambridge, MA 02139, United States of America; MassGeneral Institute for Neurodegenerative Disease, Charlestown, MA 02129, United States of America.
Aziz M MezliniDepartment of Neurology, Massachusetts General Hospital, Boston, MA 02114, United States of America; MIND Data Science Lab, Cambridge, MA 02139, United States of America; MassGeneral Institute for Neurodegenerative Disease, Charlestown, MA 02129, United States of America; Harvard Medical School, Boston, MA 02115, United States of America.
Bradley T HymanDepartment of Neurology, Massachusetts General Hospital, Boston, MA 02114, United States of America; MassGeneral Institute for Neurodegenerative Disease, Charlestown, MA 02129, United States of America; Harvard Medical School, Boston, MA 02115, United States of America.
Alberto Serrano-PozoDepartment of Neurology, Massachusetts General Hospital, Boston, MA 02114, United States of America; MassGeneral Institute for Neurodegenerative Disease, Charlestown, MA 02129, United States of America; Harvard Medical School, Boston, MA 02115, United States of America. Electronic address: ASERRANO1@mgh.harvard.edu.
Sudeshna DasDepartment of Neurology, Massachusetts General Hospital, Boston, MA 02114, United States of America; MIND Data Science Lab, Cambridge, MA 02139, United States of America; MassGeneral Institute for Neurodegenerative Disease, Charlestown, MA 02129, United States of America; Harvard Medical School, Boston, MA 02115, United States of America. Electronic address: SDAS5@mgh.harvard.edu.
Massachusetts General Hospital · USMaineGeneral Medical Center · US

Funding

Research Education ComponentP30AG062421 · NIA · MASSACHUSETTS GENERAL HOSPITAL · PI Teresa Gomez-Isla · 2019 to 2026
$36.5M
Synergy between amyloid and tau in Alzheimer's DiseaseRF1AG058674 · NIA · MASSACHUSETTS GENERAL HOSPITAL · PI HYMAN, BRADLEY T. · 2018 to 2018
$2.6M
Astrocyte Reaction in Alzheimer's DiseaseK08AG064039 · NIA · MASSACHUSETTS GENERAL HOSPITAL · PI SERRANO-POZO, ALBERTO · 2019 to 2023
$837k
NIA NIH HHS K08 AG064039NIA NIH HHS P30 AG062421NIA NIH HHS RF1 AG058674
6 · The paper itself

Abstract

Neurodegenerative disorders such as Alzheimer's disease (AD), Lewy body diseases (LBD), and the amyotrophic lateral sclerosis and frontotemporal dementia (ALS-FTD) spectrum are defined by the accumulation of specific misfolded protein aggregates. However, the mechanisms by which each proteinopathy leads to neurodegeneration remain elusive. We hypothesized that there is a common "pan-neurodegenerative" gene expression signature driving pathophysiology across these clinically and pathologically diverse proteinopathies. To test this hypothesis, we performed a systematic review of human CNS transcriptomics datasets from AD, LBD, and ALS-FTD patients and age-matched controls in the Gene Expression Omnibus (GEO) and ArrayExpress databases, followed by consistent processing of each dataset, meta-analysis, pathway enrichment, and overlap analyses. After applying pre-specified eligibility criteria and stringent data pre-processing, a total of 2600 samples from 26 AD, 21 LBD, and 13 ALS-FTD datasets were included in the meta-analysis. The pan-neurodegenerative gene signature is characterized by an upregulation of innate immunity, cytoskeleton, and transcription and RNA processing genes, and a downregulation of the mitochondrial electron transport chain. Pathway enrichment analyses also revealed the upregulation of neuroinflammation (including Toll-like receptor, TNF, and NFκB signaling) and phagocytosis, and the downregulation of mitochondrial oxidative phosphorylation, lysosomal acidification, and ubiquitin-proteasome pathways. Our findings suggest that neuroinflammation and a failure in both neuronal energy metabolism and protein degradation systems are consistent features underlying neurodegenerative diseases, despite differences in the extent of neuronal loss and brain regions involved.

Indexed as

Alzheimer DiseaseAmyotrophic Lateral SclerosisBrainEnergy MetabolismFrontotemporal DementiaHumansInflammationInflammation MediatorsLewy Body DiseaseNeurodegenerative DiseasesProteostasisTranscriptomeInflammation MediatorsAlzheimer's diseaseAmyotrophic lateral sclerosisFrontotemporal dementiaLewy body diseasesMeta-analysisMitochondrial energy metabolismNeurodegenerationNeuroinflammationProteostasisTranscriptomics

Identifiers

PMID33347974
PMCPMC7856076
OpenAlexW3116928997

What Socratic holds

Textmetadata
LicenceCC BY-NC-ND
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 Socratic graph.