Evidence map›Paper›PMID 33433698›Full record

ReviewEuropean journal of nuclear medicine and molecular imaging2021

Cellular sources of TSPO expression in healthy and diseased brain.

Erik Nutma, Kelly Ceyzériat, Sandra Amor, Stergios Tsartsalis, Philippe Millet, David R Owen, Vassilios Papadopoulos, Benjamin B Tournier

Open access · hybridAbstract readReview
In one paragraph

Review in European journal of nuclear medicine and molecular imaging, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 111 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
111citing papers in PubMed, 1 pooled it
18.2field-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

111 citing papers in PubMed, 1 synthesis or guideline pooled it, 186 citations in OpenAlex.

  1. Pooled it
  2. Does a monoclonal antibody targeting immune cells affect glutamatergic level in schizophrenia? A multimodal PET/MRS brain imaging study.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
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  15. [BMC neurology · 2026
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  16. Microglial reactivity predicts hippocampal, but not global, atrophy in cerebral small vessel disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
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  18. Comparing and combining TSPO-PET tracers in tauopathies.European journal of nuclear medicine and molecular imaging · 2026
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51 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

8 authors at 6 institutions in 4 countries.

Erik NutmaDepartment of Pathology, Amsterdam UMC, VUmc, Amsterdam, The Netherlands.
Kelly CeyzériatDivision of Adult Psychiatry, Department of Psychiatry, University Hospitals of Geneva, Avenue de la Roseraie, 64, 1206, Geneva, Switzerland.
Sandra AmorDepartment of Pathology, Amsterdam UMC, VUmc, Amsterdam, The Netherlands.
Stergios TsartsalisDivision of Adult Psychiatry, Department of Psychiatry, University Hospitals of Geneva, Avenue de la Roseraie, 64, 1206, Geneva, Switzerland.
Philippe MilletDivision of Adult Psychiatry, Department of Psychiatry, University Hospitals of Geneva, Avenue de la Roseraie, 64, 1206, Geneva, Switzerland.
David R OwenDepartment of Brain Sciences, Faculty of Medicine, Imperial College London, London, UK.
Vassilios PapadopoulosDepartment of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, USA.
Benjamin B TournierDivision of Adult Psychiatry, Department of Psychiatry, University Hospitals of Geneva, Avenue de la Roseraie, 64, 1206, Geneva, Switzerland. benjamin.tournier@hcuge.ch.ORCID http://orcid.org/0000-0002-8027-7530
University Hospital of Geneva · CHUniversity of Geneva · CHAmsterdam University Medical Centers · NLImperial College London · GBQueen Mary University of London · GBUniversity of Southern California · US

Funding

Medical Research Council MR/N008219/1Medical Research Council MR/T031891/1
6 · The paper itself

Abstract

The 18 kDa translocator protein (TSPO) is a highly conserved protein located in the outer mitochondrial membrane. TSPO binding, as measured with positron emission tomography (PET), is considered an in vivo marker of neuroinflammation. Indeed, TSPO expression is altered in neurodegenerative, neuroinflammatory, and neuropsychiatric diseases. In PET studies, the TSPO signal is often viewed as a marker of microglial cell activity. However, there is little evidence in support of a microglia-specific TSPO expression. This review describes the cellular sources and functions of TSPO in animal models of disease and human studies, in health, and in central nervous system diseases. A discussion of methods of analysis and of quantification of TSPO is also presented. Overall, it appears that the alterations of TSPO binding, their cellular underpinnings, and the functional significance of such alterations depend on many factors, notably the pathology or the animal model under study, the disease stage, and the involved brain regions. Thus, further studies are needed to fully determine how changes in TSPO binding occur at the cellular level with the ultimate goal of revealing potential therapeutic pathways.

Indexed as

Receptors, GABATomography, X-Ray ComputedAnimalsBrainHumansMicrogliaPositron-Emission TomographyReceptors, GABATSPO protein, humanAstrocytesMicrogliaPositron emission tomographyTSPO

Identifiers

PMID33433698
PMCPMC8712293
OpenAlexW3119647162

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.