scholarly journals Understanding the microbial components of periodontal diseases and periodontal treatment-induced microbiological shifts

2020 ◽  
Author(s):  
Ioannis Fragkioudakis ◽  
Marcello P. Riggio ◽  
Danae Anastasia Apatzidou
Keyword(s):  
Periodontal Diseases ◽  
Bacterial Species ◽  
Oral Microbiome ◽  
Periodontal Pocket ◽  
Oral Microbiota ◽  
Periodontal Pathogens ◽  
Susceptible Host ◽  
Modern Culture ◽  
Microbial Identification ◽  
Dental Biofilm

In the mid-1960s the microbial aetiology of periodontal diseases was introduced based on classical experimental gingivitis studies . Since then, numerous studies have addressed the fundamental role that oral microbiota plays in the initiation and progression of periodontal diseases. Recent advances in laboratory identification techniques have contributed to a better understanding of the complexity of the oral microbiome in both health and disease. Modern culture-independent methods such as human oral microbial identification microarray and next-generation sequencing have been used to identify a wide variety of microbial taxa residing in the gingival sulcus and the periodontal pocket. The first theory of the ‘non-specific plaque’ hypothesis gave rise to the ‘ecological plaque’ hypothesis and more recently to the ‘polymicrobial synergy and dysbiosis hypothesis’. Periodontitis is now considered to be a multimicrobial inflammatory disease in which the various bacterial species within the dental biofilm are in a dysbiotic state and this imbalance favours the establishment of chronic inflammatory conditions and ultimately the destruction of tooth-supporting tissues. Apart from the known putative periodontal pathogens, the whole biofilm community is now considered to play a role in the establishment of inflammation and the initiation and progression of periodontitis in a susceptible host. Treatment is unlikely to eliminate putative pathogens but, when it is thoroughly performed it has the potential to establish a healthy ecosystem by altering the microbial community in numbers and composition and also contribute to the maturation of the host immune response.

scholarly journals Study of the correlation between the clinical manifestations of the inflammatory periodontal diseases and the microbiome of periodontal pathogenic microflora in young representatives of a mixed population of the European region

2021 ◽  
Vol 18 (4) ◽  
pp. 433-444
Author(s):  
E. A. Tikhomirova ◽  
I. V. Zudina ◽  
E. S. Slazhneva ◽  
L. Yu. Orekhova ◽  
Yu. L. Denisova ◽  
...  
Keyword(s):  
Young People ◽  
Periodontal Diseases ◽  
Clinical Manifestations ◽  
Plaque Formation ◽  
Periodontal Pocket ◽  
Purulent Discharge ◽  
Control Group ◽  
Periodontal Pathogens ◽  
Dental Biofilm ◽  
Pd Complexes

The age of inflammatory periodontal disease (PD) manifestations has tended to decrease over the past decades. The study of the range of periodontal pathogens in young people and their influence on the PD manifestation contributes to the predictor identification for the early prevention of this pathology.The aim was to study the correlation between the range of periodontal pathogens in the dentoalveolar sulcus/periodontal pocket (DS/PC) contents and the clinical PD manifestations in young people.We examined 28 patients (23.1 ± 0.93 years) with dental biofilm-induced gingivitis (BG), 24 patients (30.7 ± 0.6 years) with aggressive periodontitis (AgP), and 87 clinically periodontally healthy patients (21.1 ± 0.49 years) (Control). The hygiene index and the periodontal status were determined in all patients. DNA of five periodontal pathogens was identified by PCR in the DS/PC contents. The statistical analysis was performed in Statistica 13.3. The critical significance level was p ≤ 0.05.DNA was not observed in 60.9 % of the control group samples and 7.1 % of the BG group samples. In other cases, the bacteria were found separately and as part of bacterial complexes. P.g. and T.f. were most often detected in all groups. P.g. (U = 474, р < 0.01) and A.a. (U = 209, р >< 0.05) significantly contributed to the plaque formation in the control group, T.d. – in BG and AgP groups (U = 37.5, р >< 0.05 and U = 34, р >< 0.05, respectively). In the AgP group, purulent discharge was more often recorded if T.d. was detected in the PC contents (χ2  = 5.53, р >< 0.05). T.f. + P.i. and P.g. + T.f. + P.i. complexes were exclusively associated with PD. Complexes of four bacteria were found only in the AgP group. The association of periodontal pathogens and their complexes with different PD forms was revealed.>< 0.01) and A.a. (U = 209, р <0.05) significantly contributed to the plaque formation in the control group, T.d. – in BG and AgP groups (U = 37.5, р <0.05 and U = 34, р <0.05, respectively). In the AgP group, purulent discharge was more often recorded if T.d. was detected in the PC contents (χ2  = 5.53, р <0.05). T.f. + P.i. and P.g. + T.f. + P.i. complexes were exclusively associated with PD. Complexes of four bacteria were found only in the AgP group.The association of periodontal pathogens and their complexes with different PD forms was revealed.

scholarly journals Pre and Probiotics Involved in the Modulation of Oral Bacterial Species: New Therapeutic Leads in Mental Disorders?

2021 ◽  
Vol 9 (7) ◽  
pp. 1450
Author(s):  
Yoann Maitre ◽  
Rachid Mahalli ◽  
Pierre Micheneau ◽  
Alexis Delpierre ◽  
Marie Guerin ◽  
...  
Keyword(s):  
Systematic Review ◽  
Central Nervous System ◽  
Nervous System ◽  
Oral Health ◽  
Mental Disorders ◽  
Meta Analysis ◽  
Bacterial Species ◽  
Oral Microbiome ◽  
Oral Microbiota ◽  
Therapeutic Leads

This systematic review aims to identify probiotics and prebiotics for modulating oral bacterial species associated with mental disorders. Using the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guideline, we search the electronic MEDLINE database published till January 2021 to identify the studies on probiotics and/or prebiotics for preventing and treating major oral dysbiosis that provokes mental disorders. The outcome of the search produces 374 records. After excluding non-relevant studies, 38 papers were included in the present review. While many studies suggest the potential effects of the oral microbiota on the biochemical signalling events between the oral microbiota and central nervous system, our review highlights the limited development concerning the use of prebiotics and/or probiotics in modulating oral dysbiosis potentially involved in the development of mental disorders. However, the collected studies confirm prebiotics and/or probiotics interest for a global or targeted modulation of the oral microbiome in preventing or treating mental disorders. These outcomes also offer exciting prospects for improving the oral health of people with mental disorders in the future.

scholarly journals Inter-site and interpersonal diversity of salivary and tongue microbiomes, and the effect of oral care tablets

F1000Research ◽  
2021 ◽  
Vol 9 ◽  
pp. 1477
Author(s):  
Hugo Maruyama ◽  
Ayako Masago ◽  
Takayuki Nambu ◽  
Chiho Mashimo ◽  
Kazuya Takahashi ◽  
...  
Keyword(s):  
Bacterial Species ◽  
Oral Care ◽  
Alpha Diversity ◽  
Shannon Index ◽  
Oral Microbiome ◽  
Oral Microbiota ◽  
Tongue Coating ◽  
Haemophilus Parainfluenzae ◽  
Prevotella Melaninogenica

Background: Oral microbiota has been linked to both health and diseases. Specifically, tongue-coating microbiota has been implicated in aspiration pneumonia and halitosis. Approaches altering one's oral microbiota have the potential to improve oral health and prevent diseases. Methods: Here, we designed a study that allows simultaneous monitoring of the salivary and tongue microbiomes during an intervention on the oral microbiota. We applied this study design to evaluate the effect of single-day use of oral care tablets on the oral microbiome of 10 healthy individuals. Tablets with or without actinidin, a protease that reduces biofilm formation in vitro, were tested. Results: Alpha diversity of the tongue microbiome was significantly lower than that of the salivary microbiome, using both the number of observed amplicon sequence variants (254 ± 53 in saliva and 175 ± 37 in tongue; P = 8.9e-7, Kruskal–Wallis test) and Shannon index (6.0 ± 0.4 in saliva and 5.4 ± 0.3 in tongue; P = 2.0e-7, Kruskal–Wallis test). Fusobacterium periodonticum, Saccharibacteria sp. 352, Streptococcus oralis subsp. dentisani, Prevotella melaninogenica, Granulicatella adiacens, Campylobacter concisus, and Haemophilus parainfluenzae were the core operational taxonomic units (OTUs) common to both sites. The salivary and tongue microbiomes of one individual tended to be more similar to one another than to those of other individuals. The tablets did not affect the alpha or beta diversity of the oral microbiome, nor the abundance of specific bacterial species. Conclusions: While the salivary and tongue microbiomes differed significantly in terms of bacterial composition, they showed inter- rather than intra-individual diversity. A one-day usage of oral care tablets did not alter the salivary or tongue microbiomes of healthy adults. Whether the use of oral tablets for a longer period on healthy people or people with greater tongue coating accumulation shifts their oral microbiome needs to be investigated.

scholarly journals Acquisition of Oral Microbiota is Driven by Environment, Not Host Genetics

2020 ◽  
Author(s):  
Chiranjit Mukherjee ◽  
Christina O. Moyer ◽  
Heidi M. Steinkamp ◽  
Shahr B. Hashmi ◽  
Xiaohan Guo ◽  
...  
Keyword(s):  
Genetic Relatedness ◽  
Bacterial Species ◽  
Oral Microbiome ◽  
Individual Species ◽  
Shared Environment ◽  
Oral Microbiota ◽  
Host Genetics ◽  
Early Effects ◽  
The Many

Abstract Background: The oral microbiota is acquired very early, but the factors shaping its acquisition are not well understood. Previous studies comparing monozygotic (MZ) and dizygotic (DZ) twins have suggested that host genetics plays a role. However, all twins share an equal portion of their parent’s genome, so this model is not informative for studying parent-to-child transmission. We used a novel study design that allowed us to directly examine the genetics of transmission by comparing the oral microbiota of biological versus adoptive mother-child dyads. Results: No difference was observed in how closely oral bacterial community profiles matched for adoptive versus biological mother-child pairs, indicating little if any effect of host genetics on the fidelity of transmission. Both adopted and biologic children more closely resembled their own mother as compared to unrelated women, supporting the role of contact and environment. Mother-child strain similarity increased with the age of the child, ruling out early effects of host genetic influence that are lost over time. No effect on the fidelity of mother-child strain sharing from vaginal birth or breast feeding was seen. Analysis of extended families showed that fathers and mothers were equally similar to their children, and that cohabitating couples showed even greater strain similarity than mother-child pairs. These findings support the role of contact and shared environment, and age, but not genetics, as determinants of microbial transmission, and were consistent at both species and strain level resolutions, and across multiple oral habitats. In addition, analysis of individual species all showed similar results. Conclusions: The host is clearly active in shaping the composition of the oral microbiome, since only a few of the many bacterial species in the larger environment are capable of colonizing the human oral cavity. Our findings suggest that these host mechanisms are universally shared among humans, since no effect of genetic relatedness on fidelity of microbial transmission could be detected. Instead our findings point towards contact and shared environment being the driving factors of microbial transmission, with a unique combination of these factors ultimately shaping the highly personalized human oral microbiome.

scholarly journals Oral Microbiome and Preterm Birth: Correlation or Coincidence? A Narrative Review

2020 ◽  
Vol 8 (F) ◽  
pp. 123-132
Author(s):  
Biagio Rapone ◽  
Elisabetta Ferrara ◽  
Nicola Montemurro ◽  
Ilaria Converti ◽  
Matteo Loverro ◽  
...  
Keyword(s):  
Preterm Birth ◽  
Oral Bacteria ◽  
Oral Microbiome ◽  
Periodontal Pathogen ◽  
Oral Microbiota ◽  
Periodontal Pathogens ◽  
Medline Search ◽  
Phylogenetic Community Structure ◽  
Inflammatory Status ◽  
Periodontal Infection

BACKGROUND: Physiological changes that occur during pregnancy involve, as a natural consequence, also modifications of oral microbiome. However, the addition with microbial imbalance due to pre-existing periodontal infection might impair a pathological alteration in the phylogenetic community structure and composition in the oral cavity, exacerbating an inflammatory status, and becoming a potential risk factor for preterm birth. From the empirical findings about the relationship between periodontal pathogens and systemic diseases, a clear interest focused on the potential impact of some periodontal pathogens on the preterm birth risk has emerged. AIM: Exploration of the potential interdependence existing between dysbiosis of oral microbiome and changes in maternal-fetal barrier in premature rupture of membranes. MATERIALS AND METHODS: In accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, a Medline search was performed for studies focusing on oral microbioma and its association with pre-term birth, and completed by additional hand searching. Two reviewers independently selected studies and extracted data. The search was restricted to only reports written in English. RESULTS: The electronic search produced 66 items. Six duplicates were found. Among the collected studies, 56 were discarded because they met the exclusion criteria. The articles and reports in our review showed a connection between preterm birth and altered oral microbiome, suggesting a potential key role of Fusobacterium nucleatum, a notable periodontal pathogen involved in several pathological periodontal conditions, in increasing the risk of premature birth. CONCLUSIONS: Since F. nucleatum is frequently associated with preterm birth, it is coherent to hypothesize a potential role for the oral microbiota for preterm birth risk. Further studies should be carried out to determine the changes of the oral microflora in pregnancy and to provide comprehensive knowledge of the diversity of oral bacteria involved in preterm birth.

scholarly journals Periodontal Pathogens Invade Gingiva and Aortic Adventitia and Elicit Inflammasome Activation in αvβ6 Integrin-Deficient Mice

2015 ◽  
Vol 83 (12) ◽  
pp. 4582-4593 ◽  
Author(s):  
Irina M. Velsko ◽  
Sasanka S. Chukkapalli ◽  
Mercedes F. Rivera-Kweh ◽  
Donghang Zheng ◽  
Ikramuddin Aukhil ◽  
...  
Keyword(s):  
Atherosclerotic Plaque ◽  
Inflammatory Responses ◽  
Periodontal Diseases ◽  
Periodontal Pocket ◽  
Bacterial Invasion ◽  
Inflammasome Activation ◽  
Periodontal Pathogens ◽  
Content Type ◽  
Amyloid A ◽  
Significant Difference

The American Heart Association supports an association between periodontal diseases and atherosclerosis but not a causal association. This study explores the use of the integrin β6−/−mouse model to study the causality. We investigated the ability of a polymicrobial consortium ofPorphyromonas gingivalis,Treponema denticola,Tannerella forsythia, andFusobacterium nucleatumto colonize the periodontium and induce local and systemic inflammatory responses. Polymicrobially infectedItgβ6−/−mice demonstrate greater susceptibility to gingival colonization/infection, with severe gingival inflammation, apical migration of the junctional epithelium, periodontal pocket formation, alveolar bone resorption, osteoclast activation, bacterial invasion of the gingiva, a greater propensity for the bacteria to disseminate hematogenously, and a strong splenic T cell cytokine response. Levels of atherosclerosis risk factors, including serum nitric oxide, oxidized low-density lipoprotein, serum amyloid A, and lipid peroxidation, were significantly altered by polybacterial infection, demonstrating an enhanced potential for atherosclerotic plaque progression. Aortic gene expression revealed significant alterations in specific Toll-like receptor (TLR) and nucleotide-binding domain- and leucine-rich-repeat-containing receptor (NLR) pathway genes in response to periodontal bacterial infection. Histomorphometry of the aorta demonstrated larger atherosclerotic plaques inItgβ6−/−mice than in wild-type (WT) mice but no significant difference in atherosclerotic plaque size between mice with polybacterial infection and mice with sham infection. Fluorescencein situhybridization demonstrated active invasion of the aortic adventitial layer byP. gingivalis. Our observations suggest that polybacterial infection elicits distinct aortic TLR and inflammasome signaling and significantly increases local aortic oxidative stress. These results are the first to demonstrate the mechanism of the host aortic inflammatory response induced by polymicrobial infection with well-characterized periodontal pathogens.

Domestic prophylactic agents in maintaining the dental health of the elderly

2021 ◽  
pp. 5-9
Author(s):  
A. K. Iordanishvili
Keyword(s):  
Oral Cavity ◽  
Secondary Prevention ◽  
Elderly Patients ◽  
Oral Hygiene ◽  
Periodontal Diseases ◽  
Dental Health ◽  
Oral Microbiota ◽  
Periodontal Pathogens ◽  
Dental Tissues ◽  
Group 2

Goal. To investigate dental health and oral microbiota in elderly people who use domestic care products after the completion of their sanitation.Material and methods. The prevalence and intensity of the course of dental caries, periodontal pathology, pathology of the oral mucosa, as well as the microbiota in 96 people aged 61 to 73 years were studied using conventional research methods in dentistry in elderly patients who visited a dentist for a year according to the appealability (group 1) or were under dynamic supervision and regularly carried out individual oral hygiene with the help of domestic ASEPTA products (group 2).Results. Individual prophylactic and hygienic measures for the care of the oral cavity, regularly carried out by elderly patients of group 2, significantly improved their dental health, contributed to the secondary prevention of periodontal diseases and a significant reduction in periodontal pathogens in the oral cavity.Conclusion. Elderly patients who are regularly observed by a dentist with a complex of measures for the primary and secondary prevention of dental diseases carried out 2 times a year, as well as with their proper adherence to oral care, it is possible to achieve effective treatment of the pathology of hard dental tissues, remission of inflammatory pathology of periodontal disease, and also good oral hygiene, which has a positive effect on their quality of life.

scholarly journals Oral Microbiota Composition and Function Changes During Chronic Erythematous Candidiasis

2021 ◽  
Vol 11 ◽  
Author(s):  
Xin Lyu ◽  
Hui Zheng ◽  
Xu Wang ◽  
Heyu Zhang ◽  
Lu Gao ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Bacterial Species ◽  
Oral Bacteria ◽  
Oral Microbiome ◽  
Marker Genes ◽  
Oral Microbiota ◽  
Metagenomic Sequencing ◽  
Cytochrome Bc1 Complex ◽  
Microbial Composition ◽  
Treatment And Prevention

Oral microbiota is constantly changing with the host state, whereas the oral microbiome of chronic erythematous candidiasis remains poorly understood. The aim of this study was to compare oral microbial signatures and functional profiling between chronic erythematous candidiasis and healthy subjects. Using shotgun metagenomic sequencing, we analyzed the microbiome in 12 chronic erythematous candidiasis, 12 healthy subjects, and 2 chronic erythematous candidiasis cured by antifungal therapy. We found that the salivary microbiota of chronic erythematous candidiasis was significantly different from that of healthy subjects. Among them, Rothia mucilaginosa and Streptococcus mitis were the most abundant disease-enriched species (Mann-Whitney U-test, P &lt; 0.05). In addition, co-occurrence network analysis showed that C. albicans formed densely connected modules with oral bacterial species and was mainly positive connected to Streptococcus species. Furthermore, we investigated the functional potentials of the microbiome and identified a set of microbial marker genes associated with chronic erythematous candidiasis. Some of these genes enriching in chronic erythematous candidiasis are involved in eukaryotic ribosome, putative glutamine transport system, and cytochrome bc1 complex respiratory unit. Altogether, this study revealed the changes of oral microbial composition, the co-occurrence between C. albicans and oral bacteria, as well as the changes of microbial marker genes during chronic erythematous candidiasis, which provides evidence of oral microbiome as a target for the treatment and prevention of chronic erythematous candidiasis.

scholarly journals Caries and Periodontitis: Contesting the Conventional Wisdom on Their Aetiology

2018 ◽  
Vol 52 (6) ◽  
pp. 548-564 ◽  
Author(s):  
Firoze  Manji ◽  
Gunnar Dahlen ◽  
Ole Fejerskov
Keyword(s):  
Random Noise ◽  
Early Period ◽  
Epidemiological Studies ◽  
Oral Microbiome ◽  
Oral Microbiota ◽  
Public Health Importance ◽  
Dental Biofilm ◽  
Periodontal Tissues ◽  
Dental Hard Tissues ◽  
Metabolic Activities

We review the literature on the oral microbiome and the role of the microbiota in the development of dental caries and periodontitis. While most research has been focused on identifying one or more specific determinants of these diseases, the results have provided limited predictive value and have not been able to explain the variation in the distribution of these diseases observed in epidemiological or clinical studies. Drawing on existing knowledge about the nature of the oral microbiota, we suggest that a stochastic model based on the Weiner process provides simple and parsimonious explanations for the pathogenesis of both caries and periodontitis, making few assumptions, and providing explanations for phenomena that have hitherto proved difficult, or have required complex arguments, to explain. These diseases occur as the result of the dental hard tissues and periodontal tissues integrating the random “noise” caused by normal metabolic activities of commensal microorganisms in the dental biofilm. The processes that result in the progression and regression of caries and periodontitis may be considered as “natural,” rather than pathological, even if, when left unchecked over long periods of time, they can result in the development of pathologies. The likelihood of progression or regression can be influenced by other determinants, but these processes will nevertheless occur in the absence of such influences. The distributional characteristics of the model approximate the findings of epidemiological studies indicating that, for both caries and periodontitis, there will be few sites affected in the early period after the eruption of the permanent dentition, but in those older there is an almost linear relationship with increasing age; furthermore, the longer a site survives without being affected, the less likely that it will be affected. We discuss the clinical and public health importance of these findings.

scholarly journals ESTIMATION OF PREVALENCE OF MAIN PERIODONTAL PATHOGENS AT WORKERS OF PETROCHEMICAL PRODUCTION WITH CHRONIC PERIODONTAL DISEASES

2018 ◽  
Vol 14 (2) ◽  
pp. 19-24
Author(s):  
Искандер Зайдуллин ◽  
Iskander Zaydullin ◽  
Денис Каримов ◽  
Denis Karimov ◽  
Миляуша Кабирова ◽  
...  
Keyword(s):  
Chronic Periodontitis ◽  
Oil And Gas ◽  
Periodontal Diseases ◽  
Bacterial Species ◽  
Clinical Signs ◽  
Oil And Gas Industry ◽  
Periodontal Pocket ◽  
Tooth Surface ◽  
Gas Industry ◽  
Production Factors

Background. Periodontitis is a complex, multifactorial inflammatory disease. The prevalence in the adult population is 80-98%. The onset of the disease and the progression of the inflammatory process is associated with the colonization of the subgingival tooth surface with parodontopathogenic microorganisms. Objectives. The purpose is to study the prevalence of five oral microbes in subgingival plaque samples: Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf), Treponema denticola (Td), Prevotella intermedia (Pi) in oil and gas industry employees with chronic periodontitis and identify the presence connection between the clinical manifestations of periodontitis and the microbial profile of periodontal pockets. Methods. The study of periodontal microbiota was carried out in 32 workers in oil and gas industry employees with chronic periodontitis and in 32 patients with chronic periodontitis diagnosed not working in this field. Genomic DNA was extracted and 5 bacterial species were detected using the polymerase chain reaction. Results. Oil and gas industry employees with chronic periodontitis have their own flow peculiarities associated with the systematic influence of production factors. The most prevalent microorganism is Pg (77%), the presence of which is significantly associated with an increase in the depth of the periodontal pocket (PPD), clinical attachment loss (CAL), and an increase in the bleeding on probing (BOP). The pathogenic effect was manifested in the presence of the following microorganisms - the formation of the periodontal pocket in combination of Tf and Td, Tf and Pi, CAL level - Tf and Td, increased BOP index - Pg and Tf. Conclusions. As a result of the study, a connection was established between the red and orange complex bacteria with the clinical signs of chronic periodontitis. There was no significant association between age, smoking and the clinic of chronic periodontitis. Significant impact on the development of inflammatory periodontal diseases in oil and gas industry employees have harmful production factors.

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