Evidence map›Paper›PMID 12117974›Full record

ArticleInfection and immunity2002

Fusobacterium necrophorum leukotoxin induces activation and apoptosis of bovine leukocytes.

Sanjeevkumar Narayanan, George C Stewart, M M Chengappa, Lloyd Willard, Wilma Shuman, Melinda Wilkerson, T G Nagaraja

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
3.7field-weighted citation impact, top 7% 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

24 citing papers in PubMed, 72 citations in OpenAlex.

  1. Article
  2. Review
  3. Fusobacterium necrophorum in necrotic laryngitis of feedlot cattle.Journal of veterinary internal medicine · 2026
    Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. EstablishingVirulence · 2023
    Article
  11. Outer-Membrane Vesicles ofMicroorganisms · 2023
    Article
  12. Article
  13. Article
  14. Frontiers in cellular and infection microbiology · 2022
    Article
  15. Evaluation of Immunoprotective Effects ofFrontiers in veterinary science · 2021
    Article
  16. Utilizing WholeJournal of bacteriology · 2019
    Article
  17. Article
  18. Article
  19. Article
  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

7 authors at 1 institution in 1 country.

Sanjeevkumar NarayananDepartment of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan 66506, USA.
George C Stewart
M M Chengappa
Lloyd Willard
Wilma Shuman
Melinda Wilkerson
T G Nagaraja
Kansas State University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fusobacterium necrophorum, a gram-negative, rod-shaped, anaerobic bacterium, is a primary or secondary etiological agent in a variety of necrotic, purulent infections in humans and animals. Its major virulence factor is leukotoxin, a high-molecular-weight secreted protein, primarily toxic to ruminant leukocytes. In this study, bovine peripheral blood leukocytes were exposed to various concentrations of immunoaffinity-purified leukotoxin and the cytotoxicity was analyzed by flow cytometry and scanning and transmission electron microscopy. At very low toxin concentrations, polymorphonuclear leukocytes (PMNs) showed activation, as indicated by translocation of primary and secondary granules to the periphery of the cytoplasm. Furthermore, these cells showed changes characteristic of apoptosis, including decreased cell size, organelle condensation, cytoplasmic membrane blebbing (zeiosis), and chromatin condensation and margination, and decrease in cellular DNA content. At moderately high concentrations of leukotoxin, bovine mononuclear cells were also induced to undergo programmed cell death. At very high concentrations, leukotoxin caused necrotic cell death of bovine peripheral leukocytes. The ability of F. necrophorum leukotoxin to modulate the host immune system by its toxicity, including cellular activation of PMNs and apoptosis-mediated killing of phagocytes and immune effector cells, represents a potentially important mechanism of its pathogenesis.

Indexed as

ApoptosisFusobacterium necrophorumAnimalsBacterial ToxinsCattleCytotoxinsExotoxinsFlow CytometryFluorescenceHydro-LyasesImmunophenotypingLeukocytesMicroscopy, ElectronMicroscopy, Electron, ScanningNeutrophilsPhagocytosisBacterial ToxinsCytotoxinsExotoxinsHydro-Lyaseslactate dehydrataseleukotoxin

Identifiers

PMID12117974
PMCPMC128195
OpenAlexW2108901809

What OpenQuestion holds

Textmetadata
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.