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Isolation, Characterization and Functional Examination of the Gingival Immune Cell Network
Published on: February 16, 2016
IL-1beta and TNF-alpha regulate IL-6-type cytokines in gingival fibroblasts
P Palmqvist1, P Lundberg, I Lundgren
1Department of Oral Cell Biology, Umeå University, Umeå, Sweden. py.palmqvist@odont.umu.se
Journal of Dental Research
|May 27, 2008
Summary
Gingival fibroblasts produce interleukin-6 (IL-6)-type cytokines that stimulate bone resorption. These cytokines, regulated by inflammatory signals, may contribute to periodontal disease pathogenesis via MAP kinase pathways.
Area of Science:
- Cell Biology
- Immunology
- Periodontology
Background:
- Interleukin-6 (IL-6)-type cytokines are key mediators of bone resorption.
- Gingival fibroblasts are resident cells in the periodontium with potential roles in local tissue homeostasis.
- Inflammatory cytokines like IL-1beta and TNF-alpha are implicated in periodontal disease progression.
Purpose of the Study:
- To investigate if gingival fibroblasts produce IL-6-type cytokines.
- To determine the regulation of these cytokines by IL-1beta and TNF-alpha.
- To elucidate the signaling pathways involved in cytokine production.
Main Methods:
- Cultured human gingival fibroblasts from healthy individuals.
- Quantitative PCR (qPCR) to measure mRNA expression of IL-6, IL-11, LIF, and OSM.
- Enzyme-linked immunosorbent assay (ELISA) to quantify protein levels.
- MAP kinase and NF-kappaB pathway inhibitors to study signaling.
Main Results:
- Constitutive mRNA expression of IL-6, IL-11, and LIF, but not OSM, was detected.
- IL-1beta and TNF-alpha significantly upregulated IL-6 and LIF mRNA and protein.
- IL-1beta also upregulated IL-11 mRNA and protein.
- MAP kinase activation, not NF-kappaB, mediated IL-6 and LIF mRNA stimulation.
Conclusions:
- Gingival fibroblasts produce osteotropic IL-6-type cytokines.
- Fibroblast cytokine production is modulated by inflammatory stimuli via MAP kinase signaling.
- These findings suggest a role for gingival fibroblasts in periodontal disease pathogenesis through cytokine-mediated bone resorption.
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