Local Chemokine Paralysis, a Novel Pathogenic Mechanism for Porphyromonas Gingivalis
Overview
Authors
Affiliations
Periodontitis, which is widespread in the adult population, is a persistent bacterial infection associated with Porphyromonas gingivalis. Gingival epithelial cells are among the first cells encountered by both P. gingivalis and commensal oral bacteria. The chemokine interleukin 8 (IL-8), a potent chemoattractant and activator of polymorphonuclear leukocytes, was secreted by gingival epithelial cells in response to components of the normal oral flora. In contrast, P. gingivalis was found to strongly inhibit IL-8 accumulation from gingival epithelial cells. Inhibition was associated with a decrease in mRNA for IL-8. Antagonism of IL-8 accumulation did not occur in KB cells, an epithelial cell line that does not support high levels of intracellular invasion by P. gingivalis. Furthermore, a noninvasive mutant of P. gingivalis was unable to antagonize IL-8 accumulation. Invasion-dependent destruction of the gingival IL-8 chemokine gradient at sites of P. gingivalis colonization (local chemokine paralysis) will severely impair mucosal defense and represents a novel mechanism for bacterial colonization of host tissue.
Gum-on-a-Chip Exploring Host-Microbe Interactions: Periodontal Disease Modeling and Drug Discovery.
Hu Q, Acharya A, Shum H, Leung W, Pelekos G J Tissue Eng. 2025; 16:20417314251314356.
PMID: 40078219 PMC: 11898034. DOI: 10.1177/20417314251314356.
The intriguing strategies of host interaction.
Schaffer C, Andrukhov O Front Oral Health. 2024; 5:1434217.
PMID: 38872984 PMC: 11169705. DOI: 10.3389/froh.2024.1434217.
Intracellular bacteria in cancer-prospects and debates.
Schorr L, Mathies M, Elinav E, Puschhof J NPJ Biofilms Microbiomes. 2023; 9(1):76.
PMID: 37813921 PMC: 10562400. DOI: 10.1038/s41522-023-00446-9.
Kerns K, Bamashmous S, Hendrickson E, Kotsakis G, Leroux B, Daubert D Proc Natl Acad Sci U S A. 2023; 120(41):e2306020120.
PMID: 37782795 PMC: 10576129. DOI: 10.1073/pnas.2306020120.
Social networking at the microbiome-host interface.
Lamont R, Hajishengallis G, Koo H Infect Immun. 2023; 91(9):e0012423.
PMID: 37594277 PMC: 10501221. DOI: 10.1128/iai.00124-23.