Evidence map›Paper›PMID 33407625›Full record

ArticleJournal of neuroinflammation2021

Comparisons of neuroinflammation, microglial activation, and degeneration of the locus coeruleus-norepinephrine system in APP/PS1 and aging mice.

Song Cao, Daniel W Fisher, Guadalupe Rodriguez, Tian Yu, Hongxin Dong

Open access · goldAbstract readComparative Study
In one paragraph

Article in Journal of neuroinflammation, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
4.4field-weighted citation impact, top 5% 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

44 citing papers in PubMed, 70 citations in OpenAlex.

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  20. Frontiers in pharmacology · 2025
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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

5 authors at 3 institutions in 2 countries.

Song CaoDepartment of Pain Medicine, Affiliated Hospital of Zunyi Medical University, 149 Dalian Street, Zunyi, 563000, Guizhou, China.
Daniel W FisherDepartment of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, 303 East Chicago Avenue, Chicago, IL, 60611, USA.
Guadalupe RodriguezDepartment of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, 303 East Chicago Avenue, Chicago, IL, 60611, USA.
Tian YuGuizhou Key Lab of Anesthesia and Organ Protection, Affiliated Hospital of Zunyi Medical University, 6 West Xuefu Street, Zunyi, 563002, Guizhou, China.
Hongxin DongDepartment of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, 303 East Chicago Avenue, Chicago, IL, 60611, USA. h-dong@northwestern.edu.
Northwestern University · USUniversity of Washington Medical Center · USZunyi Medical University · CN

Funding

Sex Differences in Central Stress Response and Alzheimer's Disease NeuropathologyRF1AG057884 · NIA · NORTHWESTERN UNIVERSITY AT CHICAGO · PI DONG, HONGXIN · 2017 to 2019
$2.1M
NIA NIH HHS RF1 AG057884NIH HHS R01AG062249-01NIH HHS RF1AG057884-02
6 · The paper itself

Abstract

backgroundThe role of microglia in Alzheimer's disease (AD) pathogenesis is becoming increasingly important, as activation of these cell types likely contributes to both pathological and protective processes associated with all phases of the disease. During early AD pathogenesis, one of the first areas of degeneration is the locus coeruleus (LC), which provides broad innervation of the central nervous system and facilitates norepinephrine (NE) transmission. Though the LC-NE is likely to influence microglial dynamics, it is unclear how these systems change with AD compared to otherwise healthy aging.

methodsIn this study, we evaluated the dynamic changes of neuroinflammation and neurodegeneration in the LC-NE system in the brain and spinal cord of APP/PS1 mice and aged WT mice using immunofluorescence and ELISA.

resultsOur results demonstrated increased expression of inflammatory cytokines and microglial activation observed in the cortex, hippocampus, and spinal cord of APP/PS1 compared to WT mice. LC-NE neuron and fiber loss as well as reduced norepinephrine transporter (NET) expression was more evident in APP/PS1 mice, although NE levels were similar between 12-month-old APP/PS1 and WT mice. Notably, the degree of microglial activation, LC-NE nerve fiber loss, and NET reduction in the brain and spinal cord were more severe in 12-month-old APP/PS1 compared to 12- and 24-month-old WT mice.

conclusionThese results suggest that elevated neuroinflammation and microglial activation in the brain and spinal cord of APP/PS1 mice correlate with significant degeneration of the LC-NE system.

Indexed as

Amyloid beta-Protein PrecursorPresenilin-1AgingAnimalsInflammationLocus CoeruleusMiceMice, Inbred C57BLMice, TransgenicMicrogliaNerve DegenerationNorepinephrineSpinal CordAmyloid beta-Protein PrecursorNorepinephrinePresenilin-1Alzheimer’s diseaseDopaminergicLocus coeruleusMicrogliaNoradrenergicNorepinephrine/noradrenalineNorepinephrine transporterSpinal cord

Identifiers

PMID33407625
PMCPMC7789762
OpenAlexW3120633330

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.