title: Human periodontal ligament cells facilitate leukocyte recruitment and are influenced in their immunomodulatory function by Th17 cytokine release.
abstract: The objective of this in vitro study was to examine the immunomodulatory impact of human periodontal ligament (PDL) cells on the nature and magnitude of the leukocyte infiltrate in periodontal inflammation, particularly with regard to Th17 cells. PDL cells were challenged with pro-inflammatory cytokines (IL-1ß, IL-17A, and IFN-γ) and analyzed for the expression of cytokines involved in periodontal immunoinflammatory processes (IL-6, MIP-3 alpha, IL-23A, TGFß1, IDO, and CD274). In order to further investigate a direct involvement of PDL cells in leukocyte function, co-culture experiments were conducted. The expression of the immunomodulatory cytokines studied was significantly increased under pro-inflammatory conditions in PDL cells. Although PDL cells did not stimulate leukocyte proliferation or Th17 differentiation, these cells induced the recruitment of leukocytes. The results of our study suggest that PDL cells might be involved in chronic inflammatory mechanisms in periodontal tissues and thus in the transition to an adaptive immune response in periodontitis.
authors: Department of Orthodontics, University of Bonn, Welschnonnenstr. 17, D-53111 Bonn, Germany.
authors: A
authors: A
authors: Konermann
authors: M
authors: M
authors: Beyer
authors: J
authors: J
authors: Deschner
authors: J P
authors: JP
authors: Allam
authors: N
authors: N
authors: Novak
authors: J
authors: J
authors: Winter
authors: S
authors: S
authors: Jepsen
authors: A
authors: A
authors: Jäger
mesh_terms: D015496:CD4-Positive T-Lymphocytes / Q000276:immunology / Q000378:metabolism; D002454:Cell Differentiation / Q000235:genetics / Q000276:immunology; D018920:Coculture Techniques; D006801:Humans; D007155:Immunologic Factors / Q000235:genetics / Q000276:immunology*; D007249:Inflammation / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D020381:Interleukin-17 / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D015850:Interleukin-6 / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D007962:Leukocytes / Q000276:immunology* / Q000378:metabolism; D008213:Lymphocyte Activation / Q000235:genetics / Q000276:immunology; D010513:Periodontal Ligament / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D010518:Periodontitis / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D058504:Th17 Cells / Q000276:immunology* / Q000378:metabolism; D053773:Transforming Growth Factor beta1 / Q000235:genetics / Q000276:immunology* / Q000378:metabolism
chemical_list: D007155:Immunologic Factors; D020381:Interleukin-17; D015850:Interleukin-6; D053773:Transforming Growth Factor beta1