title: Tannerella forsythia infection-induced calvarial bone and soft tissue transcriptional profiles.
abstract: Tannerella forsythia is associated with subgingival biofilms in adult periodontitis, although the molecular mechanisms contributing to chronic inflammation and loss of periodontal bone remain unclear. We examined changes in the host transcriptional profiles during a T. forsythia infection using a murine calvarial model of inflammation and bone resorption. Tannerella forsythia was injected into the subcutaneous soft tissue over calvariae of BALB/c mice for 3 days, after which the soft tissues and calvarial bones were excised. RNA was isolated and Murine GeneChip (Affymetrix, Santa Clara, CA) array analysis of transcript profiles showed that 3226 genes were differentially expressed in the infected soft tissues (P < 0.05) and 2586 genes were differentially transcribed in calvarial bones after infection. Quantitative real-time reverse transcription-polymerase chain reaction analysis of transcription levels of selected genes corresponded well with the microarray results. Biological pathways significantly impacted by T. forsythia infection in calvarial bone and soft tissue included leukocyte transendothelial migration, cell adhesion molecules (immune system), extracellular matrix-receptor interaction, adherens junction, and antigen processing and presentation. Histologic examination revealed intense inflammation and increased osteoclasts in calvariae compared with controls. In conclusion, localized T. forsythia infection differentially induces transcription of a broad array of host genes, and the profiles differ between inflamed soft tissues and calvarial bone.
authors.affiliation: Center for Oral Health Research, College of Dentistry, University of Kentucky, Lexington, KY, USA.
authors.forename: V
authors.initials: V
authors.lastname: Bakthavatchalu
authors.forename: A
authors.initials: A
authors.lastname: Meka
authors.forename: S
authors.initials: S
authors.lastname: Sathishkumar
authors.forename: M C
authors.initials: MC
authors.lastname: Lopez
authors.forename: I
authors.initials: I
authors.lastname: Bhattacharyya
authors.forename: B F
authors.initials: BF
authors.lastname: Boyce
authors.forename: J J
authors.initials: JJ
authors.lastname: Mans
authors.forename: R J
authors.initials: RJ
authors.lastname: Lamont
authors.forename: H V
authors.initials: HV
authors.lastname: Baker
authors.forename: J L
authors.initials: JL
authors.lastname: Ebersole
authors.forename: L
authors.initials: L
authors.lastname: Kesavalu
mesh_terms: D016301:Alveolar Bone Loss / Q000235:genetics* / Q000382:microbiology*; D000818:Animals; D001442:Bacteroides Infections / Q000235:genetics*; D015815:Cell Adhesion Molecules / Q000235:genetics; D055113:Chronic Periodontitis / Q000235:genetics* / Q000382:microbiology*; D005260:Female; D020869:Gene Expression Profiling; D007962:Leukocytes / Q000502:physiology; D051379:Mice; D008807:Mice, Inbred BALB C; D020411:Oligonucleotide Array Sequence Analysis; D011956:Receptors, Cell Surface / Q000235:genetics; D012886:Skull; D014158:Transcription, Genetic; D057705:Transendothelial and Transepithelial Migration / Q000235:genetics
chemical_list: D015815:Cell Adhesion Molecules; D011956:Receptors, Cell Surface; C052131:extracellular matrix receptor