Influence of cigarette smoking on oral microbiota in patients with recurrent aphthous stomatitis

2021 ◽  
pp. jim-2021-002119
Author(s):  
Xue Wang ◽  
Na Luo ◽  
Qili Mi ◽  
Weisong Kong ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Specific Effect ◽  
Recurrent Aphthous Stomatitis ◽  
Aphthous Stomatitis ◽  
Community Diversity ◽  
Oral Microbiota ◽  
Human Pathogens ◽  
Microbial Composition ◽  
Actinomyces Naeslundii ◽  
Significant Difference

Recurrent aphthous stomatitis (RAS) is a common recurrent ulcerative disease of the oral mucosa which is closely related to oral microbial composition. However, the specific effect and the mechanism of smoking in RAS are unclear. In this study, 16S rRNA sequencing technology was used to compare the differences in saliva microbial community between 28 non-smoking healthy controls (NSctrl), 31 non-smoking RAS patients (NSras), and 19 smoking RAS patients (Sras). The results showed that the bacterial community diversity in patients with RAS (NSras and Sras) was lower than that of NSctrl. The microbial community in smoking-associated RAS is less diverse and distinct from that of non-smokers. The RAS groups have higher abundance of Veillonella, Rothia, and Sneathia and lower abundance of Bacteroidales, Bacteroides, Wolinella, Moryella, Pyramidobacter, and Christensenellaceae at the genera level. A significantly different abundance of Anaerovorax, Candidatus Endomicrobium, Lactococcus, Sneathia, Veillonella, and Cloacibacterium was observed between the Sras and the NSras group. Notably, there was a significant difference in many species from the genus Prevotella and Treponema between the NSras and the Sras group. Further, the relative abundance of several taxa is correlated with smoking age or frequency, including Megasphaera, Haemophilus, Leptotrichia, and Rothia at the genera level, and Prevotella melaninogenica, Prevotella salivae, Megasphaera micronuciformis, Haemophilus parainfluenzae, Alloprevotella tannerae, Actinomyces naeslundii, Lautropia mirabilis, and Capnocytophaga sputigena at the species level. Among patients with RAS, smoking aggravated the pathways of respiration and human pathogens. Our results suggest that smoking is closely related to changes in the oral microbiota, which may contribute an opposite effect to the pathogenesis of RAS. This study provides new insight and theoretical basis for the cause and pathogenesis of RAS and better prevention and treatment.

Structural changes in gut microbiome after Ramadan fasting: a pilot study

2020 ◽  
Vol 11 (3) ◽  
pp. 227-233
Author(s):  
C. Ozkul ◽  
M. Yalinay ◽  
T. Karakan
Keyword(s):  
Microbial Community ◽  
Pilot Study ◽  
Structural Changes ◽  
Bacterial Species ◽  
Shannon Index ◽  
Microbial Community Analysis ◽  
Intermittent Fasting ◽  
Microbial Composition ◽  
Ramadan Fasting ◽  
Significant Difference

It has been largely accepted that dietary changes have an effect on gut microbial composition. In this pilot study we hypothesised that Ramadan fasting, which can be considered as a type of time-restricted feeding may lead to changes in gut microbial composition and diversity. A total of 9 adult subjects were included in the study. Stool samples were collected before (baseline) and at the end of the Ramadan fasting (after 29 days). Following the construction of an 16S rRNA amplicon library, the V4 region was sequenced using the Illumina Miseq platform. Microbial community analysis was performed using the QIIME program. A total of 27,521 operational taxonomic units (OTUs) with a 97% similarity were determined in all of the samples. Microbial richness was significantly increased after Ramadan according to observed OTU results (P=0.016). No significant difference was found in terms of Shannon index or phylogenetic diversity metrics of alpha diversity. Microbial community structure was significantly different between baseline and after Ramadan samples according to unweighted UniFrac analysis (P=0.025). LEfSe analysis revealed that Butyricicoccus, Bacteroides, Faecalibacterium, Roseburia, Allobaculum, Eubacterium, Dialister and Erysipelotrichi were significantly enriched genera after the end of Ramadan fasting. According to random forest analysis, the bacterial species most affected by the Ramadan fasting was Butyricicoccus pullicaecorum. Despite this is a pilot study with a limited sample size; our results clearly revealed that Ramadan fasting, which represents an intermittent fasting regime, leads to compositional changes in the gut microbiota.

scholarly journals Oral Microbiota Composition and Antimicrobial Antibody Response in Patients with Recurrent Aphthous Stomatitis

2019 ◽  
Vol 7 (12) ◽  
pp. 636 ◽  
Author(s):  
Zuzana Stehlikova ◽  
Vojtech Tlaskal ◽  
Natalie Galanova ◽  
Radka Roubalova ◽  
Jakub Kreisinger ◽  
...  
Keyword(s):  
Oral Mucosa ◽  
Serum Levels ◽  
Recurrent Aphthous Stomatitis ◽  
Aphthous Stomatitis ◽  
Common Disease ◽  
Oral Microbiota ◽  
Healthy Controls ◽  
Alpha And Beta Diversity ◽  
Oral Site ◽  
Bacteria And Fungi

Recurrent aphthous stomatitis (RAS) is the most common disease of the oral mucosa, and it has been recently associated with bacterial and fungal dysbiosis. To study this link further, we investigated microbial shifts during RAS manifestation at an ulcer site, in its surroundings, and at an unaffected site, compared with healed mucosa in RAS patients and healthy controls. We sampled microbes from five distinct sites in the oral cavity. The one site with the most pronounced differences in microbial alpha and beta diversity between RAS patients and healthy controls was the lower labial mucosa. Detailed analysis of this particular oral site revealed strict association of the genus Selenomonas with healed mucosa of RAS patients, whereas the class Clostridia and genera Lachnoanaerobaculum, Cardiobacterium, Leptotrichia, and Fusobacterium were associated with the presence of an active ulcer. Furthermore, active ulcers were dominated by Malassezia, which were negatively correlated with Streptococcus and Haemophilus and positively correlated with Porphyromonas species. In addition, RAS patients showed increased serum levels of IgG against Mogibacterium timidum compared with healthy controls. Our study demonstrates that the composition of bacteria and fungi colonizing healthy oral mucosa is changed in active RAS ulcers, and that this alteration persists to some extent even after the ulcer is healed.

scholarly journals Profile of microbial community of organic and conventional rice field using metagenomic analysis

2021 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Arum Asri Trisnastuti ◽  
Edi Purwanto ◽  
Ari Susilowati
Keyword(s):  
Microbial Community ◽  
Relative Abundance ◽  
Rice Field ◽  
Fertilizer Application ◽  
Rice Fields ◽  
Community Diversity ◽  
Total N ◽  
Organic C ◽  
Organic Rice ◽  
Significant Difference

Organic farming can increase the diversity of soil bacterial. This research aimed to compare the profile of microbial community of organic and conventional rice fields in early (0 Day After Planting/DAP), mid (15 DAP), and late (45 DAP) fertilizer application period. The total DNA genome from the soil sample was extracted then analyzed metagenomically using Next Generation Sequencing (NGS). There was nine genus of bacteria found in high relative abundance, 95.28%, while 4.72% included in Domain of Archaea (genus Methanosaeta). Phylum of Firmicutes (genus Clostridium has 24.50% relative abundance, Bacillus 11.90%, Lactobacillus 9.69%); Proteobacteria (genus Defluviicoccus 12.10%, Buchnera 18.46%, Rosenbergiella 2.46%); and Actinobacteria (genus Nocardioides 12.21%, and Streptomyces 3.96%). Meanwhile, the average plant height of organic rice fields was shorter than conventional rice fields got directly measured coincided with soil sampled. Based on alpha and beta diversity analysis, the highest community diversity and abundance were found in organic rice field soil samples taken at 45 DAP, i.e., at the end of the fertilizer application period. However, in both organic and conventional rice field soils, there was almost no significant difference in the bacterial community, so it impacts that organic and conventional systems do not make a real difference in the total N, P available, CEC, and pH values. It makes a significant difference in organic C and organic matters.

scholarly journals Dietary resveratrol attenuated colitis and modulated gut microbiota in dextran sulfate sodium-treated mice

2020 ◽  
Vol 11 (1) ◽  
pp. 1063-1073 ◽  
Author(s):  
Fang Li ◽  
Yanhui Han ◽  
Xiaokun Cai ◽  
Min Gu ◽  
Jin Sun ◽  
...  
Keyword(s):  
Microbial Community ◽  
Gut Microbiota ◽  
Dextran Sulfate ◽  
Dextran Sulfate Sodium ◽  
Community Diversity ◽  
Microbial Composition ◽  
Microbial Community Diversity

Dietary resveratrol altered the microbial composition and restored microbial community diversity in colitic mice, which was associated with the suppression of colitis in the mice.

W1630 Oral Microbiota in Inflammatory Bowel Disease and Recurrent Aphthous Stomatitis

2009 ◽  
Vol 136 (5) ◽  
pp. A-706
Author(s):  
Garrett C. Zella ◽  
Flavia R. Teles ◽  
Anne D. Haffajee ◽  
Joshua R. Korzenik
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Recurrent Aphthous Stomatitis ◽  
Aphthous Stomatitis ◽  
Oral Microbiota ◽  
Inflammatory Bowel

Microbial Community Analysis on Oxic-Settling-Anaerobic Process by Using PCR-DGGE Assay

2011 ◽  
Vol 255-260 ◽  
pp. 2934-2939 ◽  
Author(s):  
Jian Fang Wang ◽  
Qing Liang Zhao
Keyword(s):  
Microbial Community ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Community Analysis ◽  
Diversity Indices ◽  
Community Diversity ◽  
Microbial Community Analysis ◽  
Organic Loading Rate ◽  
Slight Variation ◽  
Biological Phosphorus Removal ◽  
Microbial Composition

In situ sludge reduction of the oxic-settling-anaerobic (OSA) process was investigated in this study and microbial community diversity in the system was analyzed by using a PCR-denaturing gradient gel electrophoresis (DGGE) approach. Comparing to the conventional activated sludge method, the production of excessive sludge in the OSA process was shown to be efficiently reduced by 44-50 % and the organic loading rate was observed to have a slight impact on sludge yield. As demonstrated by the slight variation of Shannon diversity indices (SDI), the dominant microbial composition remained stable in the OSA sludge with the increase ofNs. About 63% of clones represented by predominant bands in the DGGE pattern were affiliated with the subclass ofb-proteobacteria. A number of bacteria in the OSA process were phylogenetically related to uncultured bacteria isolated from enhanced biological phosphorus removal (EBPR) sludge.

scholarly journals Clinical Evaluation of 660 nm Diode Laser Therapy on the Pain, Size and Functional Disorders of Recurrent Aphthous Stomatitis

2019 ◽  
Vol 7 (9) ◽  
pp. 1516-1522 ◽  
Author(s):  
Hisham Abdelmonem Soliman ◽  
Diana Mostafa
Keyword(s):  
Laser Therapy ◽  
Diode Laser ◽  
Pathological Condition ◽  
Ventral Surface ◽  
Healing Time ◽  
Recurrent Aphthous Stomatitis ◽  
Aphthous Stomatitis ◽  
Control Group ◽  
Functional Disorders ◽  
Significant Difference

BACKGROUND: Minor recurrent aphthous stomatitis (MiRAS) is one of the most common, recurrent, and painful mucosal pathological condition. It is characterised by round or shallow oval ulcers, less than 10 mm in diameter, surrounded by a thin erythematous halo. It involves non-keratinized mucosa such as the labial and buccal mucosa, the ventral surface or borders of the tongue and the floor of the mouth, but it is uncommon to occur on the keratinised mucosa. It heals spontaneously within 10-14 days without scarring. There is no curative remedy to prevent its recurrence; also, available modalities only reduce the symptoms and severity of the lesion. AIM: Since these lesions may be extremely painful, we decided to estimate the pain-relieving and healing properties of low energy level laser therapy using diode laser 660 nm on MiRAS. MATERIAL AND METHODS: Twenty healthy patients suffering from minor aphthous ulcers were randomly selected from the Out-Patient Clinic of Oral Medicine Department, Faculty of Dentistry, Alexandria University. They were equally divided into two groups, study group who received 660 nm diode laser irradiation while the control group received placebo (sodium bicarbonate rinse). The visual analogue scale, size reduction, effectiveness indices and functional disorders were compared between the groups. RESULTS: Both groups presented a statistically significant difference from baseline to follow up periods. But, diode laser 660 nm treatment showed more remarkable improvements in reduction of healing time, pain and lesion size. CONCLUSION: We concluded that diode laser 660 nm should be further considered as an effective alternative therapeutic regimen to patients who suffer from recurrent aphthous stomatitis.

scholarly journals RELATIONSHIP BETWEEN RECURRENT APHTHOUS STOMATITIS WITH IRON DEFICIENCY ANEMIA

2018 ◽  
Vol 21 (2) ◽  
pp. 41-46
Author(s):  
Nurdiana Nurdiana ◽  
Pocut Astari
Keyword(s):  
Iron Deficiency ◽  
Iron Deficiency Anemia ◽  
Recurrent Aphthous Stomatitis ◽  
Aphthous Stomatitis ◽  
Deficiency Anemia ◽  
Mean Corpuscular Hemoglobin ◽  
Iron Level ◽  
Corpuscular Hemoglobin ◽  
Serum Iron Level ◽  
Significant Difference

Recurrent aphtous stomatitisis a recurrent oral ulcer. Clinically recurrent aphtous stomatitis is easy to diagnose, but its etiology and pathogenesis remain unclear because it has no single or specific cause. The main predisposing factors associated with recurrent aphtous stomatitis are genetic factors, hematological and immunologic abnormalities, local factors such as trauma, and smoking cessation. Several studies have shown that hematological abnormalities can affect the oral mucosa and cause recurrent aphtous stomatitis. The purpose of this study was to examine the relationship between recurrent aphthous stomatitis and iron deficiency anemia, as well as the relationship between recurrent aphthous stomatitis and hematological status. The subjects consist of 59 recurrent aphtous stomatitis patients and 60 control patients. A full blood examination was carried out for all subjects. Hemoglobin level, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, and serum iron level are determined for each subject.The result of this study showed that there is no significant difference in hemoglobin level, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, and serum iron level with p-value of 0.714, 0.395, 0.809, 0.497, and 0.368, respectively. The result also showed that there is no significant difference in iron deficiency anemia status between the recurrent aphtous stomatitis and control group (p = 0,7). Therefore, it can be concluded that there is no relationship between iron deficiency anemia and recurrent aphtous stomatitis incidence.

A Study of the Relationship between Helicobacter pylori and Recurrent Aphthous Stomatitis Using a Urea Breath Test

2009 ◽  
Vol 10 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Maryam Baharvand ◽  
Ziba Maleki ◽  
Kaveh Alavi ◽  
Ali Akbar Sayyari ◽  
Leila Sayyari
Keyword(s):  
Helicobacter Pylori ◽  
Breath Test ◽  
Urea Breath Test ◽  
Recurrent Aphthous Stomatitis ◽  
Aphthous Stomatitis ◽  
Control Group ◽  
Peptic Ulcers ◽  
Significant Difference ◽  
H Pylori ◽  
The Relationship

Abstract Aim Helicobacter pylori (H. pylori) is one of the most common, well-known pathogenic agents in the development of peptic ulcers. Some investigators have shown a relationship between H. pylori and recurrent aphthous stomatitis (RAS). However, this relationship is controversial. The aim of this study was to determine the association between H. pylori and RAS using the urea breath test (UBT). Methods and Materials Forty-three patients with RAS and 44 non-RAS controls were evaluated. There were no differences in gender or age in the two groups. The UBT was used to detect H. pylori infection. Data were analyzed using the Chi Square Test. Results Sixteen individuals in the RAS patients (37.2%) and 14 individuals in the control group (31.8%) had a positive breath test. The difference was not considered statistically significant (p=0.597). Conclusion In the present study no statistically significant difference was found between frequency of a positive UBT in the RAS patients and the control group. Clinical Significance Since the probability of a positive test was higher in the more severe cases this factor needs to be considered in the diagnosis and treatment of RAS. Citation Maleki Z, Sayyari AA, Alvavi K, Sayyari L, Baharvand M. A Study on the Relationship between Helicobacter pylori and Recurrent Aphthous Stomatitis Using a Urea Breath Test. J Contemp Dent Pract 2009 January; (10)1:009-016.

scholarly journals The efficacy of probiotics in management of recurrent aphthous stomatitis: a systematic review and meta-analysis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Bin Cheng ◽  
Xinyi Zeng ◽  
Shaoyuan Liu ◽  
Jing Zou ◽  
Yan Wang
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Recurrent Aphthous Stomatitis ◽  
Aphthous Stomatitis ◽  
The Other ◽  
Controlled Trials ◽  
Randomized Controlled ◽  
Oral Pain ◽  
Significant Difference ◽  
Effective Drugs

AbstractThere is currently a lack of effective drugs to cure recurrent aphthous stomatitis. This study aimed to evaluate the efficacy of probiotics alone or as an adjunct in recurrent aphthous stomatitis (RAS) patients. Seven randomized controlled trials (RCTs) were included, of which three were included in quantitative analysis. Of five studies evaluating the efficacy of probiotics alone compared with placebo or Oracure gel, two reported no significant difference in relieving oral pain, while probiotics exhibited a higher capacity for decreasing oral pain in the other three. A significant decrease in ulcer severity was found in one, while no significant difference was found in the other four. The remaining two studies demonstrated that probiotics, as an adjunct to steroids or anaesthetic antiseptic gel, significantly reduced the ulcer severity and oral pain. The meta-analysis showed a significant decrease in oral pain (− 1.72, P = 0.0001) with probiotics compared with placebo. In conclusion, probiotics alone were capable of relieving oral pain but not effective in reducing ulcer severity. A combination of probiotics and steroids or anaesthetic antiseptic gel was more effective than steroids or anaesthetic antiseptic gel alone in RAS patients. Probiotics are promising for the treatment of recurrent aphthous stomatitis.

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