Blotting, Western CCAAT enhancer binding protein CCAAT enhancer binding protein beta CCAAT-Enhancer-Binding Protein-beta CCAAT-Enhancer-Binding Proteins CEBPB protein, human Cells, Cultured Cytokine Dendritic Cells, Follicular Epithelial Attachment FDCSP protein, human Follicular dendritic cell-secreted protein GATA Transcription Factors Gene Expression Humans IL-1β Immunoprecipitation Inflammation Interleukin-1beta Periodontal Ligament Periodontal ligament Promoter Regions, Genetic Proteins Real-Time Polymerase Chain Reaction Signaling pathway Transcription, Genetic Western blotting YY1 Transcription Factor cell culture cytology