Evidence map›Paper›PMID 33531712›Full record

ArticleNature immunology2021

Outcome of SARS-CoV-2 infection is linked to MAIT cell activation and cytotoxicity.

Héloïse Flament, Matthieu Rouland, Lucie Beaudoin, Amine Toubal, Léo Bertrand, Samuel Lebourgeois, Camille Rousseau, Pauline Soulard, Zouriatou Gouda, Lucie Cagninacci and 25 more

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In one paragraph

Article in Nature immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 150 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
150citing papers in PubMed, 1 pooled it
14.7field-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

150 citing papers in PubMed, 1 synthesis or guideline pooled it, 207 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Distinct CD8iScience · 2026
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  10. The Central Role of Macrophages in Long COVID Pathophysiology.International journal of molecular sciences · 2025
    Review
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  15. Article
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90 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

35 authors at 5 institutions in 2 countries.

Héloïse Flament *Laboratory of Immunological Dysfunction, Assistance Publique-Hôpitaux de Paris (AP-HP), Bichat-Claude Bernard University Hospital, Paris, France.
Matthieu Rouland *Université de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.ORCID http://orcid.org/0000-0002-8019-7629
Lucie Beaudoin *Université de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Amine Toubal *Université de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.ORCID http://orcid.org/0000-0001-7760-3852
Léo BertrandUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.ORCID http://orcid.org/0000-0001-5584-3476
Samuel LebourgeoisDepartment of Virology, AP-HP, Bichat-Claude Bernard University Hospital, Paris, France.
Camille RousseauUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Pauline SoulardUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Zouriatou GoudaUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Lucie CagninacciUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Antoine C MonteiroDepartment of Virology, AP-HP, Bichat-Claude Bernard University Hospital, Paris, France.
Margarita Hurtado-NedelecLaboratory of Immunological Dysfunction, Assistance Publique-Hôpitaux de Paris (AP-HP), Bichat-Claude Bernard University Hospital, Paris, France.ORCID http://orcid.org/0000-0001-9681-7653
Sandrine LuceUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.ORCID http://orcid.org/0000-0002-9519-333X
Karine BaillyUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Muriel AndrieuUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Benjamin SaintpierreUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Franck LetourneurUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Youenn JouanUniversité de Tours, Inserm, Centre d'Etude des Pathologies Respiratoires UMR 1100, Tours, France.
Mustapha Si-TaharUniversité de Tours, Inserm, Centre d'Etude des Pathologies Respiratoires UMR 1100, Tours, France.
Thomas BaranekUniversité de Tours, Inserm, Centre d'Etude des Pathologies Respiratoires UMR 1100, Tours, France.
Christophe PagetUniversité de Tours, Inserm, Centre d'Etude des Pathologies Respiratoires UMR 1100, Tours, France.
Christian BoitardUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Anaïs Vallet-PichardUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Jean-François GautierDepartment of Diabetes and Endocrinology, AP-HP, Lariboisière Hospital, Paris, France.
Nadine AjzenbergDepartment of Hematology, AP-HP, Bichat-Claude Bernard University Hospital, Paris, France.
Benjamin TerrierDepartment of Internal Medicine, AP-HP, Cochin University Hospital, Paris, France.
Frédéric PèneUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France.
Jade GhosnUniversité de Paris, Infections Antimicrobials Modelling Evolution UMR 1137, Paris, France.
Xavier LescureUniversité de Paris, Infections Antimicrobials Modelling Evolution UMR 1137, Paris, France.
Yazdan YazdanpanahUniversité de Paris, Infections Antimicrobials Modelling Evolution UMR 1137, Paris, France.
Benoit VisseauxDepartment of Virology, AP-HP, Bichat-Claude Bernard University Hospital, Paris, France.
Diane DescampsDepartment of Virology, AP-HP, Bichat-Claude Bernard University Hospital, Paris, France.
Jean-François TimsitUniversité de Paris, Infections Antimicrobials Modelling Evolution UMR 1137, Paris, France.
Renato C MonteiroLaboratory of Immunological Dysfunction, Assistance Publique-Hôpitaux de Paris (AP-HP), Bichat-Claude Bernard University Hospital, Paris, France.ORCID http://orcid.org/0000-0001-5202-5646
Agnès LehuenUniversité de Paris, Institut Cochin, Inserm U1016, Centre National de la Recherche Scientifique UMR 8104, Inflamex Laboratory, Paris, France. agnes.lehuen@inserm.fr.ORCID http://orcid.org/0000-0002-0450-3321
Inserm · FRUniversité Claude Bernard Lyon 1 · FRUniversité de Tours · FRAssistance Publique – Hôpitaux de Paris · FRHôpital Cochin · FR

Funding

Agence Nationale de la Recherche (French National Research Agency) ANR-11-IDEX-0005-02Agence Nationale de la Recherche (French National Research Agency) ANR-17-CE14-0002-01Agence Nationale de la Recherche (French National Research Agency) ANR-17-RHUS-009Agence Nationale de la Recherche (French National Research Agency) ANR-19-CE14-0020Fondation pour la Recherche Médicale (Foundation for Medical Research in France) EQU201903007779Fondation pour la Recherche Médicale (Foundation for Medical Research in France) EQU201903007816
6 · The paper itself

Abstract

Immune system dysfunction is paramount in coronavirus disease 2019 (COVID-19) severity and fatality rate. Mucosal-associated invariant T (MAIT) cells are innate-like T cells involved in mucosal immunity and protection against viral infections. Here, we studied the immune cell landscape, with emphasis on MAIT cells, in cohorts totaling 208 patients with various stages of disease. MAIT cell frequency is strongly reduced in blood. They display a strong activated and cytotoxic phenotype that is more pronounced in lungs. Blood MAIT cell alterations positively correlate with the activation of other innate cells, proinflammatory cytokines, notably interleukin (IL)-18, and with the severity and mortality of severe acute respiratory syndrome coronavirus 2 infection. We also identified a monocyte/macrophage interferon (IFN)-α-IL-18 cytokine shift and the ability of infected macrophages to induce the cytotoxicity of MAIT cells in an MR1-dependent manner. Together, our results suggest that altered MAIT cell functions due to IFN-α-IL-18 imbalance contribute to disease severity, and their therapeutic manipulation may prevent deleterious inflammation in COVID-19 aggravation.

Indexed as

AdultAgedAged, 80 and overAnimalsBronchoalveolar LavageCase-Control StudiesChlorocebus aethiopsCohort StudiesCOVID-19FemaleFranceHumansImmunophenotypingInterferon-alphaInterleukin-10Interleukin-15Interferon-alphaInterleukin-10Interleukin-15Interleukin-18Interleukin-1betaInterleukin-6Interleukin-8

Identifiers

PMID33531712
OpenAlexW3127852620

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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.