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Modulation of Integrin α9β1 in Macrophages Reduces Periodontal Inflammation and Supports Alveolar Bone Preservation in Periodontitis [RNA-seq]

ABSTRACT: Bone marrow-derived macrophages (BMMs) from Itga9-Lyz2-cKO and Itga9-Lyz2-cHet mice were stimulated with Porphyromonas gingivalis (Pg) for 2 hours, then subjected to mRNA sequencing.

ORGANISM(S): Mus musculus

PROVIDER: GSE274669 | GEO | 2024/08/14

REPOSITORIES: GEO

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Modulation of Integrin α9β1 in Macrophages Reduces Periodontal Inflammation and Supports Alveolar Bone Preservation in Periodontitis [scRNA-seq]

Project description:Establish an experimental periodontitis model using Itga9-Lyz2-cKO mice and Itga9-Lyz2-cHet mice, and collect gingival tissues for single-cell analysis.

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Expression data from human macrophages treated with Porphyromonas gingivalis and its components

Project description:Periodontitis is the most common human infection affecting tooth-supporting structures. It was shown to play a role in aggravating atherosclerosis. To deepen our understanding of the pathogenesis of this disease, we exposed human macrophages to an oral bacteria Porphyromonas gingivalis (P. gingivalis) either as live bacteria, or its lipopolysaccharide (LPS) or fimbria. Microarray data from treated macrophages or control cells were analyzed to define molecular signatures. We focused our analysis on three important groups of genes. Group PG (genes differentially expressed by live bacteria only); Group LFG (genes differentially expressed in response to exposure to LPS and/or FimA); Group CG (core gene set jointly activated by all 3 stimulants). A total of 842 macrophage genes were differentially expressed in at least one of the three conditions compared to naÃ¯ve cells. Using pathway analysis, we found that group CG activates the initial phagocytosis process and induces genes relevant to immune response, whereas group PG can de-activate the phagocytosis process associated with phagosome-lysosome fusion. LFG mostly affected RIG-I-like receptor signaling pathway. 12 samples in total. 4 conditions (treatment with live P. gingivalis, P. gingivalis LPS, P. gingivalis fimbriae, or saline) were used, and triplicates were performed for each condition. We considered the following comparisons: PG vs. Control (saline), PG-LPS vs. Control, and PG-fimbriae vs. Control. Fold-change > 2.0 and FDR < 0.25 were used to select significantly expressed genes.

2010-10-23 | E-GEOD-24897 | biostudies-arrayexpress

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Project description:We report the study of the mechanism of action of Porphyromonas gingivalis on human oral epithelial cells based on high-throughput sequencing technology. By acting Porphyromonas gingivalis and its metabolites on human oral epithelial cells separately, the mechanism of Porphyromonas gingivalis evading immune surveillance and causing local and deep tissue diffusion to induce systemic diseases was studied. This study provides a framework for studying the pathogenic mechanism of Porphyromonas gingivalis.

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Porphyromonas gingivalis outer membrane vesicles promote apoptosis via msRNA-regulated DNA methylation in periodontitis

Project description:The outer membrane vesicles (OMVs) produced by Porphyromonas gingivalis (P. gingivalis) contain a variety of bioactive molecules that may be involved in the progression of periodontitis. However, the participation of P. gingivalis OMVs in the development of periodontitis has not been elucidated. Here we isolated P. gingivalis OMVs and confirmed their participation in periodontitis both in vivo and in vitro. Microcomputed Tomography (micro-CT) and histological analysis showed that under the stimulation of P. gingivalis OMVs, the alveolar bone of rats was significantly resorbed in vivo. We found that P. gingivalis OMVs were taken up by hPDLCs (human Periodontal Ligament Cells, hPDLCs) in vitro, then subsequently resulting in apoptosis and inflammatory cytokines releasing which was accomplished by the microRNA-size small RNAs (msRNAs) sRNA45033 in the P. gingivalis OMVs. Through bioinformatics analysis and screening of target genes, Chromobox 5 (CBX5) was identified as the downstream target of screened-out small RNA s45033. Using dual-luciferase reporter assay, overexpression, and knockdown methods, s45033 was confirmed to target CBX5 to regulate hPDLCs apoptosis. In addition, Cleavage Under Targets and Tagmentation (Cut&Tag) analysis confirmed the mechanism that CBX5 regulates apoptosis through the methylation of p53 DNA. Collectively, these findings indicate that the role of P. gingivalis OMVs is immunologically relevant and related to bacterial virulence in the development of periodontitis.

2022-11-30 | GSE218606 | GEO

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