Expression profiles of peripheral blood monocytes in periodontal therapy
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE6751 | GEO | 2007/12/31
SECONDARY ACCESSION(S): PRJNA98955
REPOSITORIES: GEO
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Project description:Periodontal infections have been associated with systemic inflammation and risk for atherosclerosis and vascular disease. We investigated the effects of comprehensive periodontal therapy on gene expression of peripheral blood monocytes. Approximately 1/3 of the patients showed substantial changes in expression in genes relevant to innate immunity, apoptosis, and cell signaling. We concluded that periodontal therapy may alter monocytic gene expression in a manner consistent with a systemic anti-inflammatory effect. Experiment Overall Design: Fifteen patients with periodontitis contributed with blood samples at four time points: 1 week prior to periodontal treatment (#1), at treatment initiation (baseline, #2), 6 weeks (#3) and 10 weeks post-baseline (#4). At baseline and 10 weeks, periodontal status was recorded and subgingival plaque samples were collected and processed by checkerboard DNA-DNA hybridization. Periodontal therapy, including periodontal surgery and extractions but no adjunctive antibiotics, was completed within 6 weeks. At each of the four time points, serum concentrations of 19 biomarkers were determined using multiplex assays for Luminex technology. Peripheral blood monocytes were purified, RNA was extracted, reverse-transcribed, labeled, and hybridized with Affymetrix U133 Plus 2.0 chips. Expression profiles were analyzed using linear random effects models. Further analysis of Gene Ontology (GO) terms summarized the expression patterns into biologically relevant categories. Treatment resulted in substantial improvement in clinical periodontal status and reduction in levels of several periodontal pathogens. Expression profiling over time revealed more than 11,000 probes sets differentially expressed at a false discovery rate of <0.05.
2008-06-15 | E-GEOD-6751 | biostudies-arrayexpress
Project description:Periodontal Ehlers–Danlos syndrome (pEDS) is a rare, distinct hereditary disorder characterized by early onset periodontal destruction, tissue fragility and joint hypermobility. pEDS is caused by mutant variants of C1R (and C1S) genes, which encode the C1s (and C1s) subunits of the first component of the classical complement pathway. Abberant serine protease activation will result in C4 cleavage and local complement cascade activation, as well as other possible consequences. Although multiple studies have investigated the genetic variant analysis of pEDS, the transcriptome profiles of pEDS remain unknown. To better understand the pathomechanism underlying the clinical manifestation of pEDS and to identify novel molecular targets that may expand treatment strategies, our study performed transcriptome profiling by RNA sequencing of patient-derived monocytes from 2 pEDS patients and 3 normal controls. Genes related to periodontal host defense, inflammatory response, skin disease and vascular development were significantly enriched. Furthermore, we identified genes that may be involved in the pathogenesis of periodontal destruction and pretibial pigmentation of pEDS. Overall, our study presents the first pEDS transcriptomics data, revealing distinct molecular features in monocytes of periodontal Ehlers–Danlos syndrome, and serves as a tool to better understand the disease.
2021-12-16 | GSE190786 | GEO
Project description:Periodontitis can impair the osteogenic differentiation of human periodontal mesenchymal stem cells, but the underlying molecular mechanisms are still poorly understood. Long noncoding RNAs (lncRNAs) have been demonstrated to play significant roles under both physiologic and pathological conditions. We performed comprehensive lncRNAs profiling by lncRNA microarray to identify differentially expressed long noncoding RNA expression between Periodontal ligament stem cells from healthy Periodontal tissue and periodontal ligament stem cells from inflammatory periodontal tissue. Our analysis identified 233 lncRNAs and 423 mRNAs that were differently expressed (fold change >2.0, p-value < 0.05) between the two groups of cells. The GO analysis revealed that the significantly down-regulated biological processes included multicellular organismal process, developmental process and multicellular organismal development and the significantly up-regulated biological processes included cellular process, biological regulation and response to stimulus in periodontal ligament stem cells from inflammatory periodontal tissue. The Pathway analysis revealed that the differentially expressed mRNAs may involved in Focal adhesion, ECM-receptor interaction, Bacterial invasion of epithelial cells, Long-term depression, Circadian entrainment and HIF-1 signaling pathway. Two-condition experiment, periodontal ligament stem cells from healthy periodontal tissue (hPDLSCs) vs. periodontal ligament stem cells from inflammatory periodontal tissue (pPDLSCs), Biological replicates: 3 control replicates (hPDLSCs), 3 testing replicates (pPDLSCs).
2016-02-19 | E-GEOD-78074 | biostudies-arrayexpress
Project description:Periodontal regeneration study. Periodontitis is a common chronic inflammatory disease which may lead to tooth loss. The ultimate goal of periodontal therapy is complete regeneration of the tissues lost as a result of periodontitis. However, most regenerative clinical procedures are unpredictable, largely because there is a lack of understanding of how the various tissues comprising the periodontium (gingival epithelium, gingival connective tissue, periodontal ligament, aveolar bone and cementum) interact during the regenerative process. The aim of this study was to investigate the molecular mechanisms that are involved in periodontal regeneration. For this purpose, paired sets of gingival, ligament and regenerating cells were isolated from patients that have been treated for periodontitis via a regenerative surgical procedure. A microarray analysis using the Hu133A Affymetrix arrays was used to identify the genes and pathways that were characteristic of the three different tissues. We have identified over 500 transcripts in global comparison and intrapatient comparisons that were differentially expressed between ligament and gingival samples, and approximately 30 transcripts that characterized the regenerating cell population. By using a functional classification based on Gene Ontology we were able to group the transcripts into 12 groups. Proteases/Protease inhibitors were differentially expressed between the ligament and gingiva highlighting high ECM remodelling activity by gingival cells. On the other hand, ligament cells were shown to have increased protein synthesis by increasing their nucleolar and ribosomal gene complement. We were able to identify 57 various DNA binding proteins, among them were some well characterised transcription factors, transcriptional regulators, including DNA polymerases and transcriptional co-activators. Furthermore, we have also identified changes in expression of their targets in the two tissues. This is the first study to characterise the gene expression profile of periodontal regenerating cells and allowed us to gain valuable insights into the cellular and molecular mechanisms that occur during the regenerative process. We have identified signalling pathways which are consistent with clinical observations of the regenerative properties of gingival and periodontal ligament cells. These pathways provide candidate targets that can be manipulated in order to achieve a superior regenerative clinical outcome. Keywords: other
2006-04-13 | GSE2525 | GEO
Project description:Periodontitis can impair the osteogenic differentiation of human periodontal mesenchymal stem cells, but the underlying molecular mechanisms are still poorly understood. Long noncoding RNAs (lncRNAs) have been demonstrated to play significant roles under both physiologic and pathological conditions. We performed comprehensive lncRNAs profiling by lncRNA microarray to identify differentially expressed long noncoding RNA expression between Periodontal ligament stem cells from healthy Periodontal tissue and periodontal ligament stem cells from inflammatory periodontal tissue. Our analysis identified 233 lncRNAs and 423 mRNAs that were differently expressed (fold change >2.0, p-value < 0.05) between the two groups of cells. The GO analysis revealed that the significantly down-regulated biological processes included multicellular organismal process, developmental process and multicellular organismal development and the significantly up-regulated biological processes included cellular process, biological regulation and response to stimulus in periodontal ligament stem cells from inflammatory periodontal tissue. The Pathway analysis revealed that the differentially expressed mRNAs may involved in Focal adhesion, ECM-receptor interaction, Bacterial invasion of epithelial cells, Long-term depression, Circadian entrainment and HIF-1 signaling pathway.
2016-02-19 | GSE78074 | GEO
Project description:Periodontal disease (PD) is characterized by inflammation affecting the tissue surrounding the teeth, primarily affecting the soft tissues, like the gingiva. However, without proper treatment, the condition exacerbates and progresses to impact the deeper structures, as the alveolar bone. The periodontal inflammation leads to the alveolar bone resorption, that eventually results in the complete loss of tooth support. Given its potential consequences, periodontal disease is a significant public health concern, as one of the primary causes of tooth loss, contributing to issues such as impaired mastication, speech difficulties, low self-esteem, and quality of life. Notably, comorbidities, like hypertension, can exacerbate the progression and severity of periodontal disease. In addition, the coexistence of periodontal disease and hypertension is highly likely to occur due to sharing of several risk factors. A better understanding of the underling molecular mechanisms associated to the severity of periodontal disease in the context of hypertension would greatly contribute to the advancement of translational research in the field of periodontics. MicroRNAs, a class of small non-coding RNA molecules, have an important role in regulating gene expression at the post-transcriptional level. These molecules can regulate multiple mRNA targets through complementary base pairing between the miRNA 5' seed sequence and the mRNA 3' untranslated region (UTR). Therefore, microRNAs can potentially modulate a wide variety of cellular processes, in both normal and pathological contexts. Presently, most of the studies in the field concentrate on the periodontium soft tissues, while our understanding of microRNA modulation in the alveolar bone remains comparatively limited. We used microarray analysis to evaluate the expression profiles of microRNAs in the mandibles of Wistar and SHR rats with periodontal disease, compared to their respective control groups. Our aim was to identify microRNAs of interest that could possibly be associated to the periodontal disease-induced alveolar bone loss.
2023-11-21 | GSE241787 | GEO
Project description:Periodontal pathogens (Porphyromonas gingivalis, Fusobacterium nucleatum) are known as one of several important bacterial pathogens associated with sporadic Alzheimer's disease (AD). It is suggested that the entry of Periodontal pathogens into the brain is due to the disruption of the tight junctions of endothelial cells by Periodontal pathogens. However, genomic alterations that occur as a result of Periodontal pathogens infection in endothelial cells are not well understood. Our goal was to identify genes associated with Periodontal pathogens infection-induced endothelial dysfunction by integrating gene expression data.
2023-01-07 | GSE222136 | GEO
Project description:Single-cell transcriptomics were used to comprehensively resolve the osteoimmunology microenvironment that are involved in periodontal tissues from human chronic periodontitis before and after nonsurgical periodontal therapy, as well as clinically healthy controls. This allows unbiased assessment of many heterogeneous cells at the single-cell level, hence revealing complexities of the molecular components and differences with counterparts residing in periodontal tissues.
2021-12-08 | GSE171213 | GEO
Project description:Loss of tissue attachment as a consequence of bacterial infection and inflammation represents the main therapeutic target for the treatment of periodontitis. Cementoblasts, the cells that produce the mineralized tissue, cementum, that is responsible for connecting the soft periodontal tissue to the tooth, are a key cell type for maintaining/restoring tissue attachment following disease. Here, we identify two distinct stem cell populations that contribute to cementoblast differentiation at different times by lineage tracing and single cell RNA sequencing. During postnatal development, cementoblasts are formed from perivascular‐derived cells expressing CD90 and perivascular‐associated cells that express Axin2. During adult homeostasis, only Wnt‐responsive Axin2+ cells form cementoblasts but following experimental induction of periodontal disease, CD90+ cells become the main source of cementoblasts. We thus show that different populations of resident stem cells are mobilized at different times and during disease to generate precursors for cementoblast differentiation and thus provide an insight into the targeting cells resident cells for novel therapeutic approaches.
2020-10-29 | GSE160358 | GEO
Project description:The periodontium are the tissues supporting and investing the tooth and consists of the periodontal ligament, the gingiva, the root cementum, and the alveolar bone. The functions of the cell populations in health and disease regarding the host-mediated tissue destruction are not well understood. To get a first idea, of which genes might play a distinct role in chronic periodontal disease in vivo, we compared the genom-wide gene expressions of chronic inflamed and healthy periodontal ligament cells by microarray analysis and validated the data by real-time RT-PCR. The expression rates of 14.239 genes were investigated and 3.018 of them were found differentially expressed by at least two-fold, the expression rates of 1.451 genes were significantly up-regulated and the expression rates of 1.567 genes were significantly down-regulated in inflamed PDL cells. We focused on mainly structural components, for example, laminins and integrins, as well as degrading enzymes, for example, MMPs and cathepsins. The molecular composition of the laminin network varies in chronic inflamed compared to healthy PDL cells in vivo. Furthermore, integrin alpha6beta4, together with laminin-332, might be involved in chronic periodontal inflammation. Findings that diverse keratins were upregulated in chronic disease indicate that the epithelial cell rests of Malassez might also be involved in chronic periodontal inflammation. Also cathepsin B and cathepsin C might participate in the connective tissue destruction. The microarray analysis has identified a profile of genes potentially involved in chronic periodontal inflammation in vivo. Further studies are needed to entirely understand cellular activities during chronic periodontal inflammation in vivo. Experiment Overall Design: Periodontal tissue was collected from 32 patients at the Dental Medical School of the University of Goettingen (12 men, 20 women, aged between 18 and 72 years) from March 2005 to Dezember 2005. The tissue probes were taken from teeth, either extracted for orthodontic reasons (healthy periodontium) or because of chronic periodontal lesions. The differentiation between both collectives was performed using clinical and radiological parameters (clinical attachment loss, increase in probing depth, and radiographic bone loss). A detailed anamnesis of each patient was explored. All patients were without a medical history and were not on medication. In addition, the tissue samples used in our study were only taken from non-smokers. The extracted teeth were immediately frozen and stored at -80°C. All patients who participated in the study were informed about the nature and aim of this project and gave their written informed consent. The study was approved according to the regulations of the Ethics Committee of the Medical Faculty of the University of Goettingen.
2008-06-15 | E-GEOD-7321 | biostudies-arrayexpress