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Cited by 244

The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.

Interplay between antibacterial effectors: A macrophage antimicrobial peptide impairs intracellular Salmonella replication

Open access
Rosenberger, Carrie M., Gallo, Richard L., Finlay, B. Brett·2004·Proceedings of the National Academy of Sciences

Abstract

Antimicrobial peptides have established an important role in the defense against extracellular infections, but the expression of cationic peptides within macrophages as an antibacterial effector mechanism against intracellular pathogens has not been demonstrated. Macrophage expression of the murine cathelicidin-related antimicrobial peptide (CRAMP) was increased after infection by the intracellular pathogen Salmonella typhimurium , and this increase required reactive oxygen intermediates. By using CRAMP-deficient mice or synthetic CRAMP peptide, we found that CRAMP impaired Salmonella cell division in vivo and in vitro , resulting in long filamentous bacteria. This impaired bacterial cell division also depended on intracellular elastase-like serine protease activity, which can proteolytically activate cathelicidins. Macrophage serine protease activity induced filamentation and enhanced the activity of CRAMP in vitro . A peptide-sensitive Salmonella mutant showed enhanced survival within macrophages derived from CRAMP-deficient mice, indicating that Salmonella can sense and respond to cationic peptides in the intracellular environment. Although cationic peptides have been hypothesized to have activity against pathogens within macrophages, this work provides experimental evidence that the antimicrobial arsenal of macrophages includes cathelicidins. These results show that intracellular reactive oxygen intermediates and proteases regulate macrophage CRAMP expression and activity to impair the replication of an intracellular bacterial pathogen, and they highlight the cooperativity between macrophage antibacterial effectors.

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Metadata

Authors
Rosenberger, C. M., Gallo, R. L., & Finlay, B. B.
Venue
Proceedings of the National Academy of Sciences
Published
2004-02-11
Volume
101
Issue
8
Pages
2422-2427
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2043639065
Cited by
244
References
9
FWCI
18.91
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Interplay between antibacterial effectors: A macrophage antimicrobial peptide impairs intracellular Salmonella replication. https://app.cochat.ai/papers/10.1073/pnas.0304455101
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Rosenberger, C. M., Gallo, R. L., & Finlay, B. B. (2004). Interplay between antibacterial effectors: A macrophage antimicrobial peptide impairs intracellular Salmonella replication. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0304455101

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.