Sex-based differential regulation of bacterial-induced bone resorption
| Autor: | Michael B. Chavez, Joy E Kirkpatrick, Michael S. Valerio, Bethany A. Herbert, D. S. Basilakos, Jessica D. Hathaway-Schrader, Keith L. Kirkwood |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Lipopolysaccharides Male Chemokine Lipopolysaccharide Neutrophils Osteoclasts Polymerase Chain Reaction Bone resorption Article Bone remodeling 03 medical and health sciences chemistry.chemical_compound Mice 0302 clinical medicine Immune system Sex Factors Osteoclast Gene expression medicine Animals Bone Resorption Periodontitis biology 030206 dentistry medicine.disease 030104 developmental biology medicine.anatomical_structure chemistry Immunology biology.protein Periodontics Female Chemokines |
| Zdroj: | Journal of periodontal research. 52(3) |
| ISSN: | 1600-0765 |
| Popis: | Background and Objective Periodontal disease pathogenesis is comprised of the complex inflammatory immune response to oral bacterial dysbiosis. Like other inflammatory diseases, there is sexual dimorphism evident in periodontal diseases. During periodontitis, inflammatory chemokines direct neutrophils to migrate to the site of infection to neutralize the pathogen. Interestingly, these same chemokines are also involved in regulating pathogen-induced osteoclast formation. Previous reports show differences in bone turnover and lymphocyte recruitment between sexes. We hypothesize that chemokine expression is differentially regulated by sex and thus results in differential osteoclast formation. Material and Methods Male and female mice were utilized to isolate neutrophils based on expression of Ly6G-specific, as well as defined osteoclast progenitors. Cells were stimulated with lipopolysaccharide (LPS; 100 ng/mL) then analyzed for neutrophil infiltration and gene expression. Defined osteoclast progenitors were primed: macrophage-colony stimulating factor (25 ng/mL), receptor activator of NF-κB ligand (50 ng/mL), then stimulated with LPS. Osteoclasts were enumerated via TRAP stain and mRNA isolated for gene expression analysis via quantitative polymerase chain reaction. Results In response to LPS, male neutrophils in vitro respond with increased chemokine expression and significantly more osteoclast formed in response to LPS compared to females. Conclusions Findings support observations in humans regarding a sexual dimorphism in oral bacterial infections of alveolar bone loss. Males have a strong inflammatory response to bacterial infection, resulting in increased inflammatory microenvironment, reduced pathogenic bacteria clearance and increased osteoclast-driven bone loss in response to differential expression of key chemokines. |
| Databáze: | OpenAIRE |
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