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salivary microbiota

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https://www.readbyqxmd.com/read/29670544/dynamic-alterations-in-salivary-microbiota-related-to-dental-caries-and-age-in-preschool-children-with-deciduous-dentition-a-2-year-follow-up-study
#1
Lei Xu, Xi Chen, Yuan Wang, Wen Jiang, Sa Wang, Zongxin Ling, Hui Chen
Dynamic alterations in oral microbiota are closely related to the development of dental caries;however, changes in salivary microbiota during this process have not been extensively studied. In addition, increasing evidence suggests that oral microbiome profiles differ according to dentition stages, but it is unclear whether they change with age during the same dentition, such as deciduous dentition. These two aspects were investigated in a 2-year follow-up study, and caries-free preschool children with complete deciduous dentition were enrolled...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29662960/impact-of-oral-hygiene-discontinuation-on-supragingival-and-salivary-microbiomes
#2
D Belstrøm, M L Sembler-Møller, M A Grande, N Kirkby, S L Cotton, B J Paster, S Twetman, P Holmstrup
The purpose of the present study was to characterize and compare supragingival and salivary microbiotas during a 10-d period of oral hygiene discontinuation. We tested the hypothesis that the composition of the salivary microbiota will reflect local microbial changes associated with accumulated biofilm formation and maturation. Pooled supragingival plaque ( n = 145) and stimulated saliva ( n = 145) samples were collected and plaque and gingival indices were recorded from 29 orally healthy individuals at baseline, during oral hygiene discontinuation (days 4, 7, and 10), and 14 d after resumption of oral hygiene...
January 2018: JDR Clinical and Translational Research
https://www.readbyqxmd.com/read/29643500/impact-of-a-vegan-diet-on-the-human-salivary-microbiota
#3
Tue H Hansen, Timo Kern, Emilie G Bak, Alireza Kashani, Kristine H Allin, Trine Nielsen, Torben Hansen, Oluf Pedersen
Little is known about the effect of long-term diet patterns on the composition and functional potential of the human salivary microbiota. In the present study, we sought to contribute to the ongoing elucidation of dietary effects on the oral microbial community by examining the diversity, composition and functional potential of the salivary microbiota in 160 healthy vegans and omnivores using 16S rRNA gene amplicon sequencing. We further sought to identify bacterial taxa in saliva associated with host inflammatory markers...
April 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29615776/dysbiosis-of-the-salivary-microbiota-in-pediatric-onset-primary-sclerosing-cholangitis-and-its-potential-as-a-biomarker
#4
Kentaro Iwasawa, Wataru Suda, Tomoyuki Tsunoda, Manari Oikawa-Kawamoto, Shuichiro Umetsu, Lena Takayasu, Ayano Inui, Tomoo Fujisawa, Hidetoshi Morita, Tsuyoshi Sogo, Masahira Hattori
Primary sclerosing cholangitis (PSC) is a liver disease known for its frequent concurrence with inflammatory bowel disease. Dysbiosis of the gut microbiota in PSC was reported in several studies, but the microbiological features of the salivary microbiota in PSC have not been established. Here we compared the salivary microbial communities of 24 pediatric-onset PSC patients, 16 age-matched ulcerative colitis (UC) patients, and 24 healthy controls (HCs) by analyzing the bacterial 16S rRNA gene sequence data...
April 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29614112/a-fine-tuned-vector-parasite-dialogue-in-tsetse-s-cardia-determines-peritrophic-matrix-integrity-and-trypanosome-transmission-success
#5
Aurélien Vigneron, Emre Aksoy, Brian L Weiss, Xiaoli Bing, Xin Zhao, Erick O Awuoche, Michelle B O'Neill, Yineng Wu, Geoffrey M Attardo, Serap Aksoy
Arthropod vectors have multiple physical and immunological barriers that impede the development and transmission of parasites to new vertebrate hosts. These barriers include the peritrophic matrix (PM), a chitinous barrier that separates the blood bolus from the midgut epithelia and thus modulates vector-microbiota interactions. In tsetse flies, a sleeve-like PM is continuously produced by the cardia organ located at the fore- and midgut junction. African trypanosomes, Trypanosoma brucei, must bypass the PM twice; first to colonize the midgut and secondly to reach the salivary glands (SG), to complete their transmission cycle in tsetse...
April 3, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29602225/oral-microbiota-maturation-during-the-first-7-years-of-life-in-relation-to-allergy-development
#6
Majda Dzidic, Thomas Abrahamsson, Alejandro Artacho, Maria Carmen Collado, Alex Mira, Maria C Jenmalm
BACKGROUND: Allergic diseases have become a major public health problem in affluent societies. Microbial colonization early in life seems to be critical for instructing regulation on immune system maturation and allergy development in children. Even though the oral cavity is the first site of encounter between a majority of foreign antigens and the immune system, the influence of oral bacteria on allergy development has not yet been reported. OBJECTIVE: We sought to determine the bacterial composition in longitudinally collected saliva samples during childhood in relation to allergy development...
March 30, 2018: Allergy
https://www.readbyqxmd.com/read/29559963/the-impact-of-maltitol-sweetened-chewing-gum-on-the-dental-plaque-biofilm-microbiota-composition
#7
Bart J F Keijser, Tim J van den Broek, Dagmar E Slot, Lodewic van Twillert, Jolanda Kool, Clémentine Thabuis, Michel Ossendrijver, Fridus A van der Weijden, Roy C Montijn
Background: The oral cavity harbors a complex microbial ecosystem, intimately related to oral health and disease. The use of polyol-sweetened gum is believed to benefit oral health through stimulation of salivary flow and impacting oral pathogenic bacteria. Maltitol is often used as sweetener in food products. This study aimed to establish the in vivo effects of frequent consumption of maltitol-sweetened chewing gum on the dental plaque microbiota in healthy volunteers and to establish the cellular and molecular effects by in vitro cultivation and transcriptional analysis...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29533791/supragingival-and-subgingival-microbiota-from-patients-with-poor-oral-hygiene-submitted-to-radiotherapy-for-head-and-neck-cancer-treatment
#8
Elerson Gaetti-Jardim, Ellen Cristina Gaetti Jardim, Christiane Marie Schweitzer, Júlio Cesar Leite da Silva, Murilo Moura Oliveira, Danilo Chizzolini Masocatto, Cauê Monteiro Dos Santos
OBJECTIVE: This case-control study aimed to evaluate the effects of conventional radiotherapy (RT) on the prevalence and populations of oral microorganisms in head and neck cancer patients who did not receive adequate preventive dental care. It was hypothesized that side effects of radiotherapy could be associated with radiation dose, microbiological aspects, and socioeconomic conditions of the patients. DESIGN: Twenty-eight dentate patients with head and neck cancer submitted to RT were included in the study...
January 8, 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29520798/influence-of-periodontal-treatment-on-subgingival-and-salivary-microbiotas
#9
Daniel Belstrøm, Maria Anastasia Grande, Maria Lynn Sembler-Møller, Nikolai Kirkby, Sean L Cotton, Bruce J Paster, Palle Holmstrup
BACKGROUND: The purpose of this study was to characterize and compare subgingival and salivary microbiotas before and after periodontal treatment to learn if any changes of the subgingival microbiota were reflected in saliva. We tested the hypothesis that salivary levels of specific periopathogens correlate with corresponding subgingival levels before and after periodontal treatment. METHODS: Twenty-five patients with generalized chronic periodontitis completed the study...
February 19, 2018: Journal of Periodontology
https://www.readbyqxmd.com/read/29497601/ecological-shifts-of-supragingival-microbiota-in-association-with-pregnancy
#10
Wenzhen Lin, Wenxin Jiang, Xuchen Hu, Li Gao, Dongmei Ai, Hongfei Pan, Chenguang Niu, Keyong Yuan, Xuedong Zhou, Changen Xu, Zhengwei Huang
Pregnancy is a physiological process with pronounced hormonal fluctuations in females, and relatively little is known regarding how pregnancy influences the ecological shifts of supragingival microbiota. In this study, supragingival plaques and salivary hormones were collected from 11 pregnant women during pregnancy (P1, ≤14 weeks; P2, 20-25 weeks; P3, 33-37 weeks) and the postpartum period (P4, 6 weeks after childbirth). Seven non-pregnant volunteers were sampled at the same time intervals. The microbial genetic repertoire was obtained by 16S rDNA sequencing...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29425873/digestibility-of-sulfated-polysaccharide-from-the-brown-seaweed-ascophyllum-nodosum-and-its-effect-on-the-human-gut-microbiota-in-vitro
#11
Ligen Chen, Wei Xu, Dan Chen, Guijie Chen, Junwei Liu, Xiaoxiong Zeng, Rong Shao, Hongjun Zhu
Sulfated polysaccharides from marine algae exhibit various bioactivities with potential benefits for human health and well-being. In this study, the in vitro digestibility and fermentability of polysaccharides from the brown seaweed Ascophyllum nodosum (AnPs) were examined, and the effects of AnPs on gut microbiota were determined using high-throughput sequencing technology. Salivary amylase, artificial gastric juice, and intestinal juice had no effect on AnPs, but the molecular weight of AnPs and reducing sugar decreased significantly after fermentation by gut microbiota...
February 6, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29371629/alterations-of-oral-microbiota-distinguish-children-with-autism-spectrum-disorders-from-healthy-controls
#12
Yanan Qiao, Mingtao Wu, Yanhuizhi Feng, Zhichong Zhou, Lei Chen, Fengshan Chen
Altered gut microbiota is associated with autism spectrum disorders (ASD), a group of complex, fast growing but difficult-to-diagnose neurodevelopmental disorders worldwide. However, the role of the oral microbiota in ASD remains unexplored. Via high-throughput sequencing of 111 oral samples in 32 children with ASD and 27 healthy controls, we demonstrated that the salivary and dental microbiota of ASD patients were highly distinct from those of healthy individuals. Lower bacterial diversity was observed in ASD children compared to controls, especially in dental samples...
January 25, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29362114/compositional-and-functional-variations-of-oral-microbiota-associated-with-the-mutational-changes-in-oral-cancer
#13
Shun-Fa Yang, Hsien-Da Huang, Wen-Lang Fan, Yuh-Jyh Jong, Mu-Kuan Chen, Chien-Ning Huang, Chun-Yi Chuang, Yu-Lun Kuo, Wen-Hung Chung, Shih-Chi Su
OBJECTIVES: Both genetic and environmental factors are conceivably required to assess the prognosis of oral squamous cell carcinoma (OSCC), yet little is known regarding the relationship between oral microbiome and the mutational spectrum of OSCC. MATERIALS AND METHODS: Here, we used 16S rRNA amplicon sequencing to study the composition of oral microorganisms in OSCC patients, whose cancer mutational profiles were previously defined by whole-exome sequencing, to evaluate the relationship between oral microbiome and the mutational changes in OSCC...
February 2018: Oral Oncology
https://www.readbyqxmd.com/read/29323208/composition-of-salivary-microbiota-in-elderly-subjects
#14
Taiji Ogawa, Yujiro Hirose, Mariko Honda-Ogawa, Minami Sugimoto, Satoshi Sasaki, Masahito Kibi, Shigetada Kawabata, Kazunori Ikebe, Yoshinobu Maeda
Frailty is gaining attention worldwide with the aging of society. Despite the potential lethality and multiple signs and symptoms in affected individuals, preclinical detection of early manifestations leading to frailty syndrome have not been established. We speculated that the composition of the oral microbiota is associated with general frailty, as well as a relationship between gut microbiota and general health condition. In the present study, we investigated the salivary microbiota composition in samples from healthy and frail elderly individuals using 16S rRNA sequencing analysis for characterization...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29316741/association-of-salivary-microbiota-with-dental-caries-incidence-with-dentine-involvement-after-4-years
#15
Bong-Soo Kim, Dong-Hun Han, Ho Lee, Bumjo Oh
Salivary microbiota alterations can correlate with dental caries development in children, and mechanisms mediating this association need to be studied in further detail. Our study explored salivary microbiota shifts in children and their association with the incidence of dental caries with dentine involvement. Salivary samples were collected from children with caries and their subsequently matched caries-free controls before and after caries development. The microbiota was analyzed by 16S rRNA gene-based high-throughput sequencing...
March 28, 2018: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29233857/timing-of-food-intake-impacts-daily-rhythms-of-human-salivary-microbiota-a-randomized-crossover-study
#16
María Carmen Collado, Phillip A Engen, Cristina Bandín, Raúl Cabrera-Rubio, Robin M Voigt, Stefan J Green, Ankur Naqib, Ali Keshavarzian, Frank A J L Scheer, Marta Garaulet
The composition of the diet (what we eat) has been widely related to the microbiota profile. However, whether the timing of food consumption (when we eat) influences microbiota in humans is unknown. A randomized, crossover study was performed in 10 healthy normal-weight young women to test the effect of the timing of food intake on the human microbiota in the saliva and fecal samples. More specifically, to determine whether eating late alters daily rhythms of human salivary microbiota, we interrogated salivary microbiota in samples obtained at 4 specific time points over 24 h, to achieve a better understanding of the relationship between food timing and metabolic alterations in humans...
January 5, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29184122/bacterial-alterations-in-salivary-microbiota-and-their-association-in-oral-cancer
#17
Wei-Hsiang Lee, Hui-Mei Chen, Shun-Fa Yang, Chao Liang, Chih-Yu Peng, Feng-Mao Lin, Lo-Lin Tsai, Buor-Chang Wu, Chung-Han Hsin, Chun-Yi Chuang, Ting Yang, Tzu-Ling Yang, Shinn-Ying Ho, Wen-Liang Chen, Kwo-Chang Ueng, Hsien-Da Huang, Chien-Ning Huang, Yuh-Jyh Jong
Oral squamous cell carcinoma (OSCC) is the most common malignant neoplasm of the oral cavity and the fourth leading malignancy and cause of cancer-related death in the male population of Taiwan. Most cases are detected at advanced stages, resulting in poor prognosis. Therefore, improved detection of early oral health disorders is indispensable. The involvement of oral bacteria in inflammation and their association with OSCC progression provide a feasible target for diagnosis. Due to the nature of oral neoplasms, the diagnosis of epithelial precursor lesions is relatively easy compared with that of other types of cancer...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29153519/invited-review-practical-feeding-management-recommendations-to-mitigate-the-risk-of-subacute-ruminal-acidosis-in-dairy-cattle
#18
E Humer, R M Petri, J R Aschenbach, B J Bradford, G B Penner, M Tafaj, K-H Südekum, Q Zebeli
Rumen health is of vital importance in ensuring healthy and efficient dairy cattle production. Current feeding programs for cattle recommend concentrate-rich diets to meet the high nutritional needs of cows during lactation and enhance cost-efficiency. These diets, however, can impair rumen health. The term "subacute ruminal acidosis" (SARA) is often used as a synonym for poor rumen health. In this review, we first describe the physiological demands of cattle for dietary physically effective fiber...
February 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29125139/salivary-proteins-and-microbiota-as-biomarkers-for-early-childhood-caries-risk-assessment
#19
REVIEW
Abdullah S Hemadi, Ruijie Huang, Yuan Zhou, Jing Zou
Early childhood caries (ECC) is a term used to describe dental caries in children aged 6 years or younger. Oral streptococci, such as Streptococcus mutans and Streptococcus sorbrinus, are considered to be the main etiological agents of tooth decay in children. Other bacteria, such as Prevotella spp. and Lactobacillus spp., and fungus, that is, Candida albicans, are related to the development and progression of ECC. Biomolecules in saliva, mainly proteins, affect the survival of oral microorganisms by multiple innate defensive mechanisms, thus modulating the oral microflora...
November 10, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/29105152/proton-pump-inhibitor-alters-oral-microbiome-in-gastrointestinal-tract-of-healthy-volunteers
#20
Tsuyoshi Mishiro, Kentaro Oka, Yasutoshi Kuroki, Motomichi Takahashi, Kasumi Tatsumi, Tsukasa Saitoh, Hiroshi Tobita, Norihisa Ishimura, Shuichi Sato, Shunji Ishihara, Joji Sekine, Koichiro Wada, Yoshikazu Kinoshita
BACKGROUND AND AIM: Acid suppressive agents including proton pump inhibitors (PPIs) are used as first-line treatment for various acid-related gastrointestinal disorders. Although known to profoundly reduce gastric acid production, their influence on inhibition of acid secretion as part of the function of the gastrointestinal tract microbiome remains to be elucidated. The aim of the present study was to examine the effects of PPI usage on oral and gut microbiota in healthy volunteers. METHODS: Ten healthy adult volunteers receiving no medications were enrolled...
November 4, 2017: Journal of Gastroenterology and Hepatology
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