Evidence map›Paper›PMID 21843872›Full record

ArticleCell host & microbe2011

Nutrient metal sequestration by calprotectin inhibits bacterial superoxide defense, enhancing neutrophil killing of Staphylococcus aureus.

Thomas E Kehl-Fie, Seth Chitayat, M Indriati Hood, Steven Damo, Nicole Restrepo, Carlos Garcia, Kim A Munro, Walter J Chazin, Eric P Skaar

Open access · bronzeAbstract read
In one paragraph

Article in Cell host & microbe, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 286 papers.

0numbers the graph read from it
0cells of the map it votes in
286citing papers in PubMed
9.2field-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

286 citing papers in PubMed, 411 citations in OpenAlex.

  1. Trial
  2. Article
  3. Article
  4. Article
  5. Microbiology spectrum · 2026
    Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Metal-independent effects of calprotectin on cocultures ofbioRxiv : the preprint server for biology · 2026
    Article
  13. Article
  14. Review
  15. Deletion ofApplied and environmental microbiology · 2026
    Article
  16. The innate immune protein calprotectin ablates the bactericidal activity of β-lactam antibiotics.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  17. Article
  18. Review
  19. Review
  20. Microbial metal physiology: ions to ecosystems.Nature reviews. Microbiology · 2025
    Review

226 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 2 institutions in 2 countries.

Thomas E Kehl-FieDepartment of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.
Seth Chitayat
M Indriati Hood
Steven Damo
Nicole Restrepo
Carlos Garcia
Kim A Munro
Walter J Chazin
Eric P Skaar
Vanderbilt University · USQueen's University · CA

Funding

Yessinia autotransporters (Yaps): Structure, function, and host responseU54AI057157 · NIAID · UNIV OF NORTH CAROLINA CHAPEL HILL · PI ACCAVITTI-LOPER, MARY ANN V · 2003 to 2013
$91.4M
MEDICAL SCIENTIST TRAINING PROGRAMT32GM007347 · NIGMS · VANDERBILT UNIVERSITY · PI WILLIAMS, CHRISTOPHER S. · 1985 to 2023
$26.3M
BIOCHEMICAL &CHEMICAL TRAINING FOR CANCER RESEARCHT32CA009582 · NCI · VANDERBILT UNIVERSITY · PI David K Cortez · 1987 to 2026
$8.8M
Interdisciplinary Training Program in Lung ResearchT32HL094296 · NHLBI · VANDERBILT UNIVERSITY MEDICAL CENTER · PI Ray Stokes Peebles · 2008 to 2026
$6.3M
Pathobiology of heme inducible transporters in Gram positive pathogensR01AI073843 · NIAID · VANDERBILT UNIVERSITY MEDICAL CENTER · PI SKAAR, ERIC P · 2009 to 2025
$5.9M
Mechanism and function of heme-iron utilization in staphylococcal pathogenesisR01AI069233 · NIAID · VANDERBILT UNIVERSITY MEDICAL CENTER · PI SKAAR, ERIC P · 2006 to 2020
$5.6M
S100 PROTEINS: STRUCTURAL BASIS OF FUNCTIONAL PROPERTIESR01GM062112 · NIGMS · VANDERBILT UNIVERSITY · PI CHAZIN, WALTER J. · 2000 to 2009
$2.1M
NCI NIH HHS 5 T32 CA009582-23NCI NIH HHS T32 CA009582NHLBI NIH HHS T32 HL094296NHLBI NIH HHS T32HL094296-02NIAID NIH HHS R01 AI069233NIAID NIH HHS R01AI069233NIAID NIH HHS R01 AI073843NIAID NIH HHS R01AI073843NIAID NIH HHS U54 AI057157NIGMS NIH HHS 1 R01GM62112NIGMS NIH HHS R01 GM062112NIGMS NIH HHS T32 GM007347NIGMS NIH HHS T32 GM07347
6 · The paper itself

Abstract

By sequestering manganese and zinc, the neutrophil protein calprotectin plays a crucial role in host defense against bacterial and fungal pathogens. However, the essential processes disrupted by calprotectin remain unknown. We report that calprotectin enhances the sensitivity of Staphylococcus aureus to superoxide through inhibition of manganese-dependent bacterial superoxide defenses, thereby increasing superoxide levels within the bacterial cell. Superoxide dismutase activity is required for full virulence in a systemic model of S. aureus infection, and disruption of staphylococcal superoxide defenses by calprotectin augments the antimicrobial activity of neutrophils promoting in vivo clearance. Calprotectin mutated in two transition metal binding sites and therefore defective in binding manganese and zinc does not inhibit microbial growth, unequivocally linking the antimicrobial properties of calprotectin to metal chelation. These results suggest that calprotectin contributes to host defense by rendering bacterial pathogens more sensitive to host immune effectors and reducing bacterial growth.

Indexed as

AnimalsAnti-Bacterial AgentsDisease Models, AnimalLeukocyte L1 Antigen ComplexMaleManganeseMiceMice, Inbred C57BLNeutrophilsOxidative StressStaphylococcal InfectionsStaphylococcus aureusSuperoxide DismutaseSuperoxidesZincAnti-Bacterial AgentsLeukocyte L1 Antigen ComplexManganeseSuperoxide DismutaseSuperoxidesZinc

Identifiers

PMID21843872
PMCPMC3157011
OpenAlexW2156658768

What OpenQuestion holds

Textmetadata
LicenceTDM
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.