Genetic dependence of the specific T-cell cytokine response to Porphyromonas gingivalis in mice

Gemmell, E., Carter, C. L., Bird, P. S. and Seymour, G. J. (2002) Genetic dependence of the specific T-cell cytokine response to Porphyromonas gingivalis in mice. Journal of Periodontology, 73 6: 591-596. doi:10.1902/jop.2002.73.6.591


Author Gemmell, E.
Carter, C. L.
Bird, P. S.
Seymour, G. J.
Title Genetic dependence of the specific T-cell cytokine response to Porphyromonas gingivalis in mice
Journal name Journal of Periodontology   Check publisher's open access policy
ISSN 0022-3492
Publication date 2002
Sub-type Article (original research)
DOI 10.1902/jop.2002.73.6.591
Volume 73
Issue 6
Start page 591
End page 596
Total pages 6
Editor Robert Genco
Place of publication Chicago
Publisher American Academy of Periodontology
Collection year 2002
Language eng
Subject C1
320899 Dentistry not elsewhere classified
730112 Oro-dental and disorders
1105 Dentistry
Abstract Background: Susceptibility to periodontal infections may, in part, be genetically determined. Porphyromonas gingivalis is a major periodontopathogen, and the immune response to this organism requires T-cell help. The aim of the present study was to examine the specific T-cell cytokine responses to P gingivalis outer membrane antigens in a mouse model and their relationship with H-2 haplotype. Methods: BALB/c and DBA/2J (H-2(d)), CBACaH (H-2(k)), and C57BL6 (H-2(b)) mice were immunized with P gingivalis outer membrane antigens weekly for 3 weeks. One week after the final injection, the spleens were removed, and 6 T-cell lines specific for P gingivalis were established for each mouse strain. The percentage of CD4 and CD8 cells in the P gingivalis-specific T-cell lines staining positive for intracytoplasmic interleukin (IL)-4, interferon (IFN)-gamma, and IL-10 was determined by 2-color flow cytometry. Results: The cytokine profiles of T-cell lines from BALB/c and DBA/2J mice showed no significant differences. Significantly fewer IL4+, IFN-gamma+, and IL-10+ CD4 cells than IL-4+, IFN-gamma+, and IL-10+ CD8 cells, respectively, were demonstrated for both strains. P gingivalis-specific T-cell lines generated from CBACaH mice were similar to those generated from BALB/c and DBA/2J mice; however, the mean percentage of IL4+ CD4 cells in CBACaH mice was lower than the percentage of IFN-gamma+ CD4 cells. Also, the mean percentage of IFN-gamma+ CD4 cells in CBACaH mice was significantly increased compared to DBA/2J mice. Unlike the other 3 strains, T-cell lines established from C57BL6 mice contained similar percentages of cytokine-positive cells, although the percentage of IL-4+ CD4 cells was reduced in comparison to the percentage of CD8 cells. However, comparisons with the other 3 strains demonstrated a higher percentage of IL-4+ CD4 cells than in lines established from the spleens of DBA/2J mice, IFN-gamma+ CD4 cells than in lines established from BALB/c and CBACaH mice, and IL-10+ CD4 cells than in lines established from all 3 other strains. No significant differences in the percentage of positive CD8 cells were demonstrated between lines in the 4 strains of mice. Conclusion: The specific T-cell response to P gingivalis in mice may, in the case of the CD4 response, depend on MHC genes. These findings are consistent with the concept that patient susceptibility is important to the outcome of periodontal infection and may, in part, be genetically determined.
Keyword Dentistry, Oral Surgery & Medicine
Cytokines
Models, Animal
T Lymphocytes
Periodontal Diseases/microbiology
Porphyromonas Gingivalls
Alveolar Bone Loss
Gamma-interferon
Murine Model
Periodontal-disease
Animal-models
Susceptibility
Infection
Resistance
Antigens
Cd4(+)
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Dentistry Publications
 
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Created: Tue, 14 Aug 2007, 17:01:21 EST