Evidence map›Paper›PMID 34232954›Full record

ArticlePLoS biology2021

Exosomes mediate LTB4 release during neutrophil chemotaxis.

Ritankar Majumdar, Aidin Tavakoli Tameh, Subhash B Arya, Carole A Parent

Abstract read
In one paragraph

Article in PLoS biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing 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

30 citing papers in PubMed.

  1. Article
  2. cPLAScience advances · 2026
    Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Review
  8. Review
  9. Article
  10. Review
  11. Cysteinyl Leukotrienes in Allergic Inflammation.Annual review of pathology · 2025
    Review
  12. Article
  13. Review
  14. Review
  15. Review
  16. Article
  17. Review
  18. Article
  19. Innate Pulmonary Phagocytes and Their Interactions with PathogenicJournal of fungi (Basel, Switzerland) · 2023
    Review
  20. Article
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

4 authors.

Ritankar MajumdarLaboratory of Cellular and Molecular Biology Center for Cancer Research, NCI, NIH, Bethesda, Maryland, United States of America.
Aidin Tavakoli TamehLaboratory of Cellular and Molecular Biology Center for Cancer Research, NCI, NIH, Bethesda, Maryland, United States of America.
Subhash B AryaDepartment of Pharmacology, University of Michigan Medical School, Ann Arbor, United States of America.ORCID 0000-0002-5671-8666
Carole A ParentLaboratory of Cellular and Molecular Biology Center for Cancer Research, NCI, NIH, Bethesda, Maryland, United States of America.ORCID 0000-0002-1518-1452

Funding

Signal relay during directed cell migrationR01AI152517 · NIAID · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI HANSON, PHYLLIS I, PARENT, CAROLE ANNE · 2020 to 2024
$2.6M
NIAID NIH HHS R01 AI152517
6 · The paper itself

Abstract

Leukotriene B4 (LTB4) is secreted by chemotactic neutrophils, forming a secondary gradient that amplifies the reach of primary chemoattractants. This strategy increases the recruitment range for neutrophils and is important during inflammation. Here, we show that LTB4 and its synthesizing enzymes localize to intracellular multivesicular bodies, which, upon stimulation, release their content as exosomes. Purified exosomes can activate resting neutrophils and elicit chemotactic activity in an LTB4 receptor-dependent manner. Inhibition of exosome release leads to loss of directional motility with concomitant loss of LTB4 release. Our findings establish that the exosomal pool of LTB4 acts in an autocrine fashion to sensitize neutrophils towards the primary chemoattractant, and in a paracrine fashion to mediate the recruitment of neighboring neutrophils in trans. We envision that this mechanism is used by other signals to foster communication between cells in harsh extracellular environments.

Indexed as

Arachidonate 5-LipoxygenaseBiological TransportChemotaxis, LeukocyteExosomesHumansLeukotriene B4Neutrophil ActivationNeutrophilsN-Formylmethionine Leucyl-PhenylalanineReceptors, LamininRibosomal ProteinsTetraspanin 30Arachidonate 5-LipoxygenaseCD63 protein, humanLeukotriene B4N-Formylmethionine Leucyl-PhenylalanineReceptors, LamininRibosomal ProteinsRPSA protein, humanTetraspanin 30

Identifiers

PMID34232954
PMCPMC8262914

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.