Evidence map›Paper›PMID 33422891›Full record

ArticleNeurobiology of aging2021

Dystrophic microglia are associated with neurodegenerative disease and not healthy aging in the human brain.

Ryan K Shahidehpour, Rebecca E Higdon, Nicole G Crawford, Janna H Neltner, Eseosa T Ighodaro, Ela Patel, Douglas Price, Peter T Nelson, Adam D Bachstetter

Abstract read
In one paragraph

Article in Neurobiology of aging, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 117 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
117citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

117 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  14. Glial Cells and Aging: From the CNS to the Cerebellum.International journal of molecular sciences · 2025
    Review
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57 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.

Ryan K ShahidehpourSpinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, KY, USA; Department of Neuroscience, University of Kentucky, Lexington, KY, USA.
Rebecca E HigdonSpinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, KY, USA; Department of Neuroscience, University of Kentucky, Lexington, KY, USA.
Nicole G CrawfordSpinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, KY, USA; Department of Neuroscience, University of Kentucky, Lexington, KY, USA.
Janna H NeltnerSanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA; Department of Pathology and Laboratory Medicine, Division of Neuropathology, University of Kentucky, Lexington, KY, USA.
Eseosa T IghodaroDepartment of Neuroscience, University of Kentucky, Lexington, KY, USA; Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA.
Ela PatelSanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA.
Douglas PriceSanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA.
Peter T NelsonDepartment of Neuroscience, University of Kentucky, Lexington, KY, USA; Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA; Department of Pathology and Laboratory Medicine, Division of Neuropathology, University of Kentucky, Lexington, KY, USA.
Adam D BachstetterSpinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, KY, USA; Department of Neuroscience, University of Kentucky, Lexington, KY, USA; Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA. Electronic address: adam.bachstetter@uky.edu.

Funding

University of Kentucky Alzheimer's Disease Research CenterP30AG072946 · NIA · UNIVERSITY OF KENTUCKY · PI LINDA J VAN ELDIK · 2021 to 2026
$23.5M
University of Kentucky Alzheimer's Disease Core Center - Biomarker CoreP30AG028383 · NIA · UNIVERSITY OF KENTUCKY · PI SCHMITT, FREDERICK · 2006 to 2020
$23.3M
Training in Translational Research in Alzheimer's and Related Dementias (TRIAD)T32AG057461 · NIA · UNIVERSITY OF KENTUCKY · PI MURPHY, MICHAEL PAUL, VAN ELDIK, LINDA J · 2017 to 2021
$2.1M
PROBING CELLULAR INTRACELLULAR CALCIUM SIGNALING AND SENSING THROUGH COMPUTATIONR35GM124977 · NIGMS · UNIVERSITY OF KENTUCKY · PI KEKENES-HUSKEY, PETER MICHAEL · 2017 to 2021
$1.8M
Pumping iron: Loss of iron homeostasis causes microglia degeneration in ADR21AG066865 · NIA · UNIVERSITY OF KENTUCKY · PI BACHSTETTER, ADAM D · 2020 to 2020
$421k
NIA NIH HHS P30 AG028383NIA NIH HHS P30 AG072946NIA NIH HHS R21 AG066865NIA NIH HHS T32 AG057461NIGMS NIH HHS R35 GM124977
6 · The paper itself

Abstract

Loss of physiological microglial function may increase the propagation of neurodegenerative diseases. Cellular senescence is a hallmark of aging; thus, we hypothesized age could be a cause of dystrophic microglia. Stereological counts were performed for total microglia, 2 microglia morphologies (hypertrophic and dystrophic) across the human lifespan. An age-associated increase in the number of dystrophic microglia was found in the hippocampus and frontal cortex. However, the increase in dystrophic microglia was proportional to the age-related increase in the total number of microglia. Thus, aging alone does not explain the presence of dystrophic microglia. We next tested if dystrophic microglia could be a disease-associated microglia morphology. Compared with controls, the number of dystrophic microglia was greater in cases with either Alzheimer's disease, dementia with Lewy bodies, or limbic-predominant age-related TDP-43 encephalopathy. These results demonstrate that microglia dystrophy, and not hypertrophic microglia, are the disease-associated microglia morphology. Finally, we found strong evidence for iron homeostasis changes in dystrophic microglia, providing a possible molecular mechanism driving the degeneration of microglia in neurodegenerative disease.

Indexed as

Cellular SenescenceFemaleFrontal LobeHealthy AgingHippocampusHomeostasisHumansHypertrophyIronMaleMicrogliaNeurodegenerative DiseasesIronAgingMicroglia morphologyNeurodegenerationNeuroinflammationNeuropathologySenescence

Identifiers

PMID33422891
PMCPMC8293930

What OpenQuestion holds

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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.