Specialized pro-resolving lipid mediators in gut immunophysiology: from dietary precursors to inflammation resolution.

Purpose Of Review: This review aims to examine recent research on the role of specialized pro-resolving mediators (SPMs) in the regulation of gut immunophysiology.

Recent Findings: Inflammatory bowel disease (IBD) is characterized by chronic inflammation in the gastrointestinal tract, driven by disruptions in the intestinal barrier and an imbalance between the host immune system and gut microbiota. Dietary polyunsaturated fatty acids (PUFAs), especially ω-3 and ω-6, are key regulators of immune responses and help maintain the integrity of the intestinal barrier.

Fusobacterium nucleatum triggers senescence phenotype in gingival epithelial cells.

The prevalence of periodontitis increases with physiological aging. However, whether bacteria associated with periodontal diseases foster aging and the mechanisms by which they may do so are unknown. Herein, we hypothesize that Fusobacterium nucleatum, a microorganism associated with periodontitis and several other age-related disorders, triggers senescence, a chief hallmark of aging responsible to reduce tissue repair capacity.

Osteogenesis in human periodontal ligament stem cell sheets is enhanced by the protease-activated receptor 1 (PAR) in vivo.

Human periodontal ligament stem cells (PDLSCs) have been studied as a promising strategy in regenerative approaches. The protease-activated receptor 1 (PAR) plays a key role in osteogenesis and has been shown to induce osteogenesis and increase bone formation in PDLSCs. However, little is known about its effects when activated in PDLSCs as a cell sheet construct and how it would impact bone formation as a graft in vivo.

Periodontitis, chronic liver diseases, and the emerging oral-gut-liver axis.

The liver carries out a wide range of functions ranging from the control of metabolites, nutrient storage, and detoxification to immunosurveillance. While inflammation is essential for the tissue remodeling and maintenance of homeostasis and normal liver physiology, constant exposure to dietary and microbial products creates a niche for potentially prolonged immune activation and unresolved inflammation in susceptible host. Failure to restrain inflammation can lead to development of chronic liver diseases characterized by fibrosis, cirrhosis and eventually liver failure.

Probiotics improve re-epithelialization of scratches infected by Porphyromonas gingivalis through up-regulating CXCL8-CXCR1/CXCR2 axis.

Porphyromonas gingivalis inhibits the release of CXCL8 by gingival epithelial cells and reduces their proliferation. We previously reported that Bifidocaterium sp. and Lactobacillus sp.

Therapeutic potential of periodontal ligament stem cells.

Inflammatory periodontal disease known as periodontitis is one of the most common conditions that affect human teeth and often leads to tooth loss. Due to the complexity of the periodontium, which is composed of several tissues, its regeneration and subsequent return to a homeostatic state is challenging with the therapies currently available. Cellular therapy is increasingly becoming an alternative in regenerative medicine/dentistry, especially therapies using mesenchymal stem cells, as they can be isolated from a myriad of tissues.

Maresin-1 and Resolvin E1 Promote Regenerative Properties of Periodontal Ligament Stem Cells Under Inflammatory Conditions.

Maresin-1 (MaR1) and Resolvin E1 (RvE1) are specialized pro-resolving lipid mediators (SPMs) that regulate inflammatory processes. We have previously demonstrated the hard and soft tissue regenerative capacity of RvE1 in an model of the periodontal disease characterized by inflammatory tissue destruction. Regeneration of periodontal tissues requires a well-orchestrated process mediated by periodontal ligament stem cells.

Probiotics alter biofilm formation and the transcription of virulence-associated genes.

Background And Objective: The potential of probiotics on the prevention and control of periodontitis and other chronic inflammatory conditions has been suggested. and species influence interaction with gingival epithelial cells (GECs) but may not act in a unique way. In order to select the most appropriate probiotic against , we aimed to evaluate the effect of several strains on biofilm formation and transcription virulence-associated factors (PgVAFs).

Chemokines and cytokines profile in whole saliva of patients with periodontitis.

Clinical features suggest differences in immune response among periodontitis forms, albeit a large number of cytokines and chemokines remain to be evaluated. The saliva is an available source of mediators and its analysis would be valuable in order to understand pathophysiological differences. The objective of this study was analyze chemokines/cytokines profile in whole saliva of individuals with severe periodontitis (Stage III) presenting moderate [Grade B; GB] or rapid progression rate with a localized incisor-molar pattern [Grade C; GC/IMP].

Probiotics alter the immune response of gingival epithelial cells challenged by Porphyromonas gingivalis.

Background And Objective: Although previous studies revealed the potential use of probiotics in the control of periodontitis, little is known about their interactions with gingival epithelial cells (GECs). Since GECs comprise the first defense in the subgingival microenvironment, the aim of this study was to evaluate the effect of probiotic lactobacilli and bifidobacteria strains on OBA-9 cells challenged with Porphyromonas gingivalis.

Methods: Immortalized human GECs (OBA-9) were challenged with live P.

A systematic review and meta-analysis on the effects of crown lengthening on adjacent and non-adjacent sites.

Objectives: The objective of the study was to assess the impact of periodontal crown lengthening surgery on clinical parameters at adjacent and non-adjacent sites compared to treated sites.

Material And Methods: An electronic search was carried out on MEDLINE-PubMed, The Cochrane Library, and ISI Web of Science databases between 1978 and 2015. Methodological quality assessment was based on Cochrane recommendations.