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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

Abstract : 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.
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Theses
File URL :
http://docnum.univ-lorraine.fr/ulprive/DDOC_T_2019_0205_DUBAR.pdf
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https://hal.univ-lorraine.fr/tel-02529337
Contributor : Thèses Ul <>
Submitted on : Thursday, April 2, 2020 - 11:49:20 AM
Last modification on : Tuesday, October 13, 2020 - 10:46:05 AM

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  • HAL Id : tel-02529337, version 1

Citation

Marie Dubar. 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. Médecine humaine et pathologie. Université de Lorraine, 2019. Français. ⟨NNT : 2019LORR0205⟩. ⟨tel-02529337⟩

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