Academic literature on the topic 'Cellules parodontales'
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Journal articles on the topic "Cellules parodontales":
Petrović, Milica, Ljiljana Kesić, Radmila Obradović, Simona Stojanović, Branislava Stojković, Marija Bojović, Ivana Stanković, Kosta Todorović, Milan Spasić, and Nenad Stošić. "Regenerative periodontal therapy: I part." Acta stomatologica Naissi 37, no. 84 (2021): 2304–13. http://dx.doi.org/10.5937/asn2184304p.
Ferranti, B., R. Armanino, and C. Becce. "L’importanza dei Toll-Like Receptors nei tessuti parodontali. Ruolo delle cellule del parodonto nell’attivazione dell’infiammazione locale in seguito ad aggressione batterica." Dental Cadmos 82, no. 1 (January 2014): 9–28. http://dx.doi.org/10.1016/s0011-8524(14)70120-5.
Boutoille, Florian. "La gingivo-stomatite chronique féline : état des lieux des connaissances." Bulletin de l'Académie vétérinaire de France 175 (2022). http://dx.doi.org/10.3406/bavf.2022.70997.
Dissertations / Theses on the topic "Cellules parodontales":
Séguier, Sylvie. "L'inflammation gingivale et les cellules de Langerhans au cours des parodontopathies chez l'homme." Paris 5, 2000. http://www.theses.fr/2000PA05S007.
Sy, Kadiatou. "Potentiel thérapeutique de médications intracanalaires dans les lésions endo-parodontales." Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILS047.
Endo-periodontal lesions (EPL) are difficult clinical situations where periodontal and pulpal pathologies occur in the same tooth. Their treatment usually involves a combined endodontic and periodontal approach, and their prognosis is often uncertain. Intracanal calcium hydroxide (Ca[OH]2) medications (ICM), to complete root canal disinfection, have been reported to have a positive effect on periodontal healing in EPL, but the specific mechanisms involved in the process are still unclear.The first part of this experimental study is devoted to the optimization of a Ca(OH)2-based MIC by addition of different antimicrobial agents (copper, zinc, silver and chlorhexidine [CHX]) and to the precise characterization of the resulting formulations. Among the tested molecules, only chlorhexidine (CHX) (0.5%, 1% and 2%) significantly improved, in vitro, the antimicrobial activity of the Ca(OH)2 paste on the target microorganisms, without altering its mechanical and physicochemical properties.The second part of the work reports the ex vivo study of the diffusion potential of active compounds contained in the ICM through the dental root and the in vitro study of the effect of ICM extracts on the viability and response of three populations of periodontal cells (fibroblasts of the periodontal ligament, cementoblasts and osteoblasts). A stronger diffusion of ions (Ca2+, OH-) and CHX via the apex could be demonstrated, with variable release profiles over time and according to the initial CHX dose. In vitro, diluted Ca(OH)2 extracts (with or without CHX) seem to be well tolerated by periodontal cells and to reduce the production of inflammatory mediators without significant effect on the mineralization potential of the cells
Huck, Olivier. "Infection et stimulation de cellules endothéliales par Porphyromonas gingivalis et son lipopolysaccharide : lien entre maladies parodontales et athérosclérose." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAJ021.
Periodontal diseases have been linked to systemic diseases especially cardiovascular diseases and atherosclerosis. In our study, we investigated the effects induced by an infection with Porphyromonas gingivalis, a major periodontal pathogen, and stimulation by its lipopolysaccharide on endothelial cells at the interface between the inner part of arteries and blood flow. We focused on the effects induced on cathepsin B, a protease involved in atherosclerosis and on the activation of inflammasome, an intracellular complex linked to secretion of IL-1beta. Results showed that infection with Porphyromonas gingivalis and stimulation by its lipopolysaccharide increase enzymatic activity of cathepsin B with different kinetics. These modifications are observed without any modifications of RNAm expression and protein concentration. We also showed that infection with Porphyromonas gingivalis increases RNAm expression of NLRP3 but this increase at the RNAm level is not associated with an increase of the protein concentration due to an induced proteolysis. Furthermore, we developed a reliable model of experimental periodontitis that will be used to analyze interactions between periodontitis and systemic diseases in vivo, especially in apolipoprotein-E -/- mice
Monsarrat, Paul. "Cellules souches, médecine régénérative et régénération parodontale." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30031/document.
The first part of this work introduces a new concept of analysis of clinical trial records and the dynamics of their evolution, both thematic and temporal. This concept has been applied to regenerative medicine, showing the lack of correlation between the source of stem cells and the fields of application. The stomatognathic diseases are few involved in clinical trials for stem cells therapy. Yet periodontitis, immuno-infectious diseases responsible for the destruction of the tooth supporting tissues, are a major public health issue. While the authors agree on the responsibility of the immune and microbial ecology in the pathophysiology of the disease, the reasons for dysbiosis, individual susceptibilities, are still unclear. Graft of mesenchymal stromal cells (MSCs) would return to homeostasis by promoting the activation of endogenous MSCs. The second part of this work shows that periodontitis were potentially associated with 57 systemic diseases; the clinical trials registry of the World Health Organization have been analyzed. The efficacy and safety of the use of MSCs for periodontal regeneration in animal models have also been demonstrated. Yet the models suffered from methodological problems, periodontal lesions are few representative of the pathophysiology. This second part thus provides data on the effectiveness of ASC (CSM from adipose tissue) to improve quantitative and qualitative regeneration of periodontal supporting tissues in a mouse model where periodontal lesions were generated by repeated administration of parodonto-pathogenic bacteria. It is therefore a model whose pathophysiology is closer to that found in humans. Finally, the second part demonstrates broad antibacterial spectrum of ASC whose effect is both direct (macrophage-like effect) and indirect (via the secretion of antibacterial factors)
Dubar, Marie. "TREM-1 et parodontite : évaluation clinique de l’effet du traitement étiologique parodontal sur les concentrations de TREM-1 soluble et études in vitro de l’impact de P. gingivalis sur l’expression de TREM-1 par des cellules du parodonte." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0205.
Periodontal diseases are chronic multifactorial inflammatory diseases, affecting the tissues surrounding the teeth. The current consensus concerning their etiopathogenesis recognizes that the majority of tissue destruction is the result of a complex dysbiotic infectious process associated with immune system dysfunctions possibly exacerbated by general factors such as stress/anxiety. TREM-1 (Triggering Receptor Expressed on Myeloid cells-1) is an immunoreceptor expressed by neutrophils and monocytes/macrophages. It plays a fundamental role in the early stages of the inflammatory response and in particular in its amplification via TLRs (Toll-like receptor). In a clinical study in patients with periodontitis, we have observed, for the first time, the effects of a non-surgical periodontal treatment on the concentrations of the soluble receptor of TREM-1, sTREM-1, remaining higher in non-improved sites. However, TREM-1s, a potential marker of the inflammatory state of the site, does not appear to be a predictive marker of periodontal healing after treatment. Clinical results also provide a new insight into the complexity of the relationships between microbiological, clinical and psychosocial factors. At the same time, the use of the peptide LR12, modulator of TREM-1, induced decreased production of pro-inflammatory cytokines in in vitro models of monocytes stimulated by Porphyromonas gingivalis, a major periodontopathogen. This TREM-1 modulating agent could potentially be an interesting adjuvant in periodontal therapies to limit the amplitude of the inflammatory response without completely inhibiting it
Vincent, Séverine. "Infection des épithélia du parodonte par le virus Epstein-Barr : vers un nouveau modèle physiopathologique de la maladie parodontale." Nice, 2012. http://www.theses.fr/2012NICE4039.
Chronic periodontitis (CP) is a common inflammatory disease recognized as a major cause of tooth loss worldwide. Although bacterial pathogens are thought to initiate the periodontal inflammation, other pathogenic mechanisms must contribute. Viruses, notably Epstein-Barr virus (EBV), have emerged as putative periodontal pathogens, leading to the proposal of a synergistic model between viruses and bacteria. However, evidence is still lacking to demonstrate that EBV actively replicates in periodontal tissues, and if so, which periodontal cells are infected and which pathogenic mechanisms might be involved. Therefore, aim of our work was to explore these questions in CP patients. Using a simple cell-sampling, periodontal cells from 20 CP patients were analyzed through histologic, immunochemical, quantitative RT-PCR, and in situ hybridization studies. We discovered that the periodontal epithelial cells (pEC) of the junctional epithelium are frequently infected with EBV and this frequency correlated with disease progression. Moreover, EBV-infected pEC were more likely to be apoptotic than non-infected pEC and that apoptosis and EBV-infection of pEC were strongly associated. It was also thought that EBV may contribute to local immune dysfunction through the production of local inflammatory chémokines. We focused on CCL20 expression and showed that EBV-infection and CCL20 production by pEC was strongly associated. Our findings are novel in that they uncover a new paradigm whereby an EBV-associated pathology involves widespread infection of epithelial cells, establishing a first in vivo model of epithelial EBV replication in otherwise healthy individual
Bisson-Boutelliez, Catherine. "Desulfovibrio spp. dans la maladie parodontale : Interactions avec les cellules épithéliales KB et activité de l'amoxicilline libre ou complexée sur ces formes extracellulaires et intracellulaires." Thesis, Nancy 1, 2009. http://www.theses.fr/2009NAN10113/document.
It has been suggested that Desulfovibrio, which are sulfate-reducing anaerobic bacteria, may be involved in periodontitis. We investigated the capacity of Desulfovibrio to invade epithelial cells and induce cytokine secretion from these cells. We showed that Desulfovibrio desulfuricans and Desulfovibrio fairfieldensis were able to invade and to multiply within oral epithelial cells (KB cells). Intracytoplasmic location of both bacteria was confirmed by confocal laser scanning and transmission microscopy. Invasion of these strains involved microtubule but not microfilament polymerization. Infection by Desulfovibrio resulted in an increase of the production of IL-6 and IL-8 by KB cells. The ability of D. desulfuricans and D. fairfieldensis to survive within oral epithelial cells and to modulate the epithelial immune response may contribute to the initiation and progression of periodontal diseases. Desulfovibrio as well as other periodontopathogens may produce ß-lactamases and have the capacity to invade epithelial cells. It has been suggested that the hydrolysis of amoxicillin might be prevented by using an amoxicillin-ß-cyclodextrin (ßCD) complex and that intracellular diffusion of antimicrobial agents might be enhanced after complexation with ßCDs. A stable [1:1] amoxicillin-ßCD complex, characterized by spectroscopic and thermal analysis, did neither improve the activity of amoxicillin against ß-lactamase producing strains nor enhance the intracellular diffusion of this compound
Coyac, Benjamin R. "Periodontal pathobiology and defective cell-autonomous mineralization in X-linked hypophosphatemia." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCB006/document.
X-linked hypophosphatemia (XLH) is a rare X-linked dominant disorder caused by inactivating mutations in the PHEX gene. The impairment of PHEX protein leads to an increase in FGF23, a circulating factor that causes systemic loss of phosphate. The rachitic skeleton of patients with XLH displays short stature and osteomalacia. Dental defects include poorly mineralized dentin and spontaneous dental abscesses. Little is known about the periodontal condition of XLH and if patients are more prone to develop periodontitis, eventually leading to tooth loss. Although the exact function and substrate of PHEX are not known, it has been shown in vitro that PHEX could interact with SIBLING proteins such as MEPE or OPN, both involved in the regulation of bone and dentin mineralization, but it is not yet clear if the defects in the calcified extracellular matrices of XLH are caused by systemic hypophosphatemia only, or also by local consequences of the absence of PHEX. The aim of this doctoral dissertation was to explore the pathobiology of the XLH periodontium and to determine the impact of PHEX deficiency at the local level in a model of human biomineralization where phosphate supply could be adjusted and normalized. We first examined 34 adults with XLH in a case-control study and observed that periodontitis frequency and severity were increased in individuals with late or incomplete supplementation in phosphate and vitamin D analogs. The periodontium was then analyzed in XLH dental roots and further characterized in the Hyp mouse, the murine model of XLH. We performed a model of tooth movement adaptation leading to the formation of cellular cementum and a model of periodontal breakdown and repair to investigate the impact of XLH on the pathobiology of periodontal tissues. Our results showed strongly affected XLH/Hyp periodontal phenotype and impaired pathobiology and suggested that the key role played by OPN in bone could not be generalized to other periodontal mineralized tissues. In order to determine the role of PHEX in local human mineralization, dense collagen gels were seeded with primary human dental pulp cells harvested from XLH patients displaying PHEX mutations and age-matched healthy individuals. Cell-seeded gels were cultured up to 24 days under osteogenic conditions and controlled phosphate medium concentrations. Our results showed that despite normal phosphate concentrations, PHEX deficiency led to decreased quantity and quality of the mineral phase and a pathologic accumulation and processing of OPN. Overall the original contributions of this doctoral dissertation consist in the demonstration of a higher susceptibility of XLH patients to periodontitis and in the evidence of a local effect of PHEX deficiency in the pathologic intrinsic mineralization from XLH osteogenic cells
Conference papers on the topic "Cellules parodontales":
Le Choismier, H. "Un transporteur d’oxygène universel d’origine marine au service de la santé." In 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206601009.