Evidence map›Paper›PMID 34669475›Full record

ArticleScience advances2021

Microglia become hypofunctional and release metalloproteases and tau seeds when phagocytosing live neurons with P301S tau aggregates.

Jack H Brelstaff, Matthew Mason, Taxiarchis Katsinelos, William A McEwan, Bernardino Ghetti, Aviva M Tolkovsky, Maria Grazia Spillantini

Abstract read
In one paragraph

Article in Science advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 95 papers.

0numbers the graph read from it
0cells of the map it votes in
95citing papers in PubMed
–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

95 citing papers in PubMed.

  1. Article
  2. Review
  3. Review
  4. Review
  5. Article
  6. Review
  7. Unraveling the molecular mechanisms of aluminium chloride-induced Alzheimer's disease.Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2026
    Review
  8. Article
  9. Article
  10. Review
  11. Review
  12. Silmitasertib, an FDA-designated orphan CK2 inhibitor, ameliorates neuropathology and motor dysfunction in a Huntington's disease mouse model.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2026
    Article
  13. Article
  14. Microglial phagocytosis in Alzheimer disease.Nature reviews. Neurology · 2026
    Review
  15. Review
  16. Article
  17. Article
  18. Amyloid beta and tau are associated with the dual effect of neuroinflammation on neurodegeneration.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  19. Article
  20. Review

35 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

7 authors.

Jack H BrelstaffDepartment of Clinical Neurosciences, Clifford Allbutt Building, University of Cambridge, Cambridge CB2 0AH, UK.ORCID 0000-0003-4772-8018
Matthew MasonDepartment of Clinical Neurosciences, Clifford Allbutt Building, University of Cambridge, Cambridge CB2 0AH, UK.ORCID 0000-0003-4284-0174
Taxiarchis KatsinelosDepartment of Clinical Neurosciences, Clifford Allbutt Building, University of Cambridge, Cambridge CB2 0AH, UK.ORCID 0000-0001-6951-3216
William A McEwanDepartment of Clinical Neurosciences, Clifford Allbutt Building, University of Cambridge, Cambridge CB2 0AH, UK.ORCID 0000-0002-4408-0407
Bernardino GhettiDepartment of Pathology and Laboratory Medicine, Indiana University, Indianapolis, IN, USA.
Aviva M TolkovskyDepartment of Clinical Neurosciences, Clifford Allbutt Building, University of Cambridge, Cambridge CB2 0AH, UK.ORCID 0000-0003-1951-3175
Maria Grazia SpillantiniDepartment of Clinical Neurosciences, Clifford Allbutt Building, University of Cambridge, Cambridge CB2 0AH, UK.ORCID 0000-0002-8544-7332

Funding

Research Education ComponentP30AG010133 · NIA · INDIANA UNIV-PURDUE UNIV AT INDIANAPOLIS · PI SAYKIN, ANDREW J · 1991 to 2020
$37.3M
Research Education ComponentP30AG072976 · NIA · INDIANA UNIVERSITY INDIANAPOLIS · PI ANDREW J SAYKIN · 2021 to 2026
$24.1M
National Centre for the Replacement, Refinement and Reduction of Animals in Research NC/L000741/1NIA NIH HHS P30 AG010133NIA NIH HHS P30 AG072976
6 · The paper itself

Abstract

The microtubule-associated protein tau aggregates in multiple neurodegenerative diseases, causing inflammation and changing the inflammatory signature of microglia by unknown mechanisms. We have shown that microglia phagocytose live neurons containing tau aggregates cultured from P301S tau mice due to neuronal tau aggregate-induced exposure of the “eat me” signal phosphatidylserine. Here, we show that after phagocytosing tau aggregate-bearing neurons, microglia become hypophagocytic while releasing seed-competent insoluble tau aggregates. These microglia express a senescence-like phenotype, demonstrated by acidic β-galactosidase activity, secretion of paracrine senescence-associated cytokines, and maturation of matrix remodeling enzymes, results that are corroborated in P301S mouse brains and ex vivo brain slices. In particular, the nuclear factor κB–dependent activation of matrix metalloprotease 3 (MMP3/stromelysin1) was replicated in brains from patients with tauopathy. These data show that microglia that have been activated to ingest live tau aggregates-bearing neurons behave hormetically, becoming hypofunctional while acting as vectors of tau aggregate spreading.

Identifiers

PMID34669475
PMCPMC8528424

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.