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salivary microbiota

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https://www.readbyqxmd.com/read/28819242/the-saliva-microbiome-profiles-are-minimally-affected-by-collection-method-or-dna-extraction-protocols
#1
Yenkai Lim, Makrina Totsika, Mark Morrison, Chamindie Punyadeera
Saliva has attracted attention as a diagnostic fluid due to the association of oral microbiota with systemic diseases. However, the lack of standardised methods for saliva collection has led to the slow uptake of saliva in microbiome research. The aim of this study was to systematically evaluate the potential effects on salivary microbiome profiles using different methods of saliva collection, storage and gDNA extraction. Three types of saliva fractions were collected from healthy individuals with or without the gDNA stabilising buffer...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28803012/effect-of-fermented-milk-containing-lactobacillus-rhamnosus-sd11-on-oral-microbiota-of-healthy-volunteers-a-randomized-clinical-trial
#2
P Rungsri, N Akkarachaneeyakorn, M Wongsuwanlert, S Piwat, P Nantarakchaikul, R Teanpaisan
The aims of this study were to evaluate whether short-term consumption of fermented milk containing Lactobacillus rhamnosus SD11 affected levels of oral microbiota in vivo and whether L. rhamnosus SD11 could colonize in the human mouth. We also monitored for potential side effects of the probiotic. The applicability of using L. rhamnosus SD11 compared with Lactobacillus bulgaricus as a starter culture for fermented milk was evaluated. After informed consent, 43 healthy young adults were recruited and randomly assigned to either the probiotic or control group and received fermented milk containing L...
August 9, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28800622/microbial-profile-comparisons-of-saliva-pooled-and-site-specific-subgingival-samples-in-periodontitis-patients
#3
Daniel Belstrøm, Maria Lynn Sembler-Møller, Maria Anastasia Grande, Nikolai Kirkby, Sean Liam Cotton, Bruce J Paster, Palle Holmstrup
OBJECTIVES: The purpose of this study was to compare microbial profiles of saliva, pooled and site-specific subgingival samples in patients with periodontitis. We tested the hypotheses that saliva can be an alternative to pooled subgingival samples, when screening for presence of periopathogens. DESIGN: Site specific subgingival plaque samples (n = 54), pooled subgingival plaque samples (n = 18) and stimulated saliva samples (n = 18) were collected from 18 patients with generalized chronic periodontitis...
2017: PloS One
https://www.readbyqxmd.com/read/28790932/the-effects-of-weaning-methods-on-gut-microbiota-composition-and-horse-physiology
#4
Núria Mach, Aline Foury, Sandra Kittelmann, Fabrice Reigner, Marco Moroldo, Maria Ballester, Diane Esquerré, Julie Rivière, Guillaume Sallé, Philippe Gérard, Marie-Pierre Moisan, Léa Lansade
Weaning has been described as one of the most stressful events in the life of horses. Given the importance of the interaction between the gut-brain axis and gut microbiota under stress, we evaluated (i) the effect of two different weaning methods on the composition of gut microbiota across time and (ii) how the shifts of gut microbiota composition after weaning affect the host. A total of 34 foals were randomly subjected to a progressive (P) or an abrupt (A) weaning method. In the P method, mares were separated from foals at progressively increasing intervals every day, starting from five min during the fourth week prior to weaning and ending with 6 h during the last week before weaning...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28780386/salivary-microbiome-in-non-oral-disease-a-summary-of-evidence-and-commentary
#5
REVIEW
Aneesha Acharya, Yuki Chan, Supriya Kheur, Li Jian Jin, Rory M Watt, Nikos Mattheos
OBJECTIVE: The advent of high-throughput sequencing and 'omic' technologies is facilitating an 'open-ended' understanding of the human microbial community and its interplay with health. This commentary aims to present key perspectives and summarize current evidence from metagenomic studies of salivary microbiota in relation to general health and systemic diseases. DESIGN: A narrative review of studies that described salivary microbiome composition in relation to various general health conditions was conducted and the main results were summarized...
July 29, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28668353/salsa-a-dance-on-a-slippery-floor-with-changing-partners
#6
M P Reichhardt, U Holmskov, S Meri
It is becoming increasingly clear that the connections between our immune system and the microbiota colonizing us have a tremendous impact on human health. A number of innate molecular defence mechanisms cooperate to selectively target unwanted microorganisms at the mucosal surfaces. Amongst others these include the complement system, IgA and the SALSA molecule. The salivary scavenger and agglutinin (SALSA), also known as deleted in malignant brain tumors 1 (DMBT1), salivary agglutinin (SAG) or gp340 is a multifunctional molecule with important functions in innate immunity, inflammation and epithelial homeostasis...
June 28, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28649403/inter-personal-diversity-and-temporal-dynamics-of-dental-tongue-and-salivary-microbiota-in-the-healthy-oral-cavity
#7
Michael W Hall, Natasha Singh, Kester F Ng, David K Lam, Michael B Goldberg, Howard C Tenenbaum, Josh D Neufeld, Robert G Beiko, Dilani B Senadheera
Oral microbes form a complex and dynamic biofilm community, which is subjected to daily host and environmental challenges. Dysbiosis of the oral biofilm is correlated with local and distal infections and postulating a baseline for the healthy core oral microbiota provides an opportunity to examine such shifts during the onset and recurrence of disease. Here we quantified the daily, weekly, and monthly variability of the oral microbiome by sequencing the largest oral microbiota time-series to date, covering multiple oral sites in ten healthy individuals...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/28637979/the-oral-microbiome-and-human-health
#8
Yoshihisa Yamashita, Toru Takeshita
In this brief review, we discuss our previous research on the relationship between the bacterial composition of salivary microbiota and periodontal disease. Analysis using a terminal restriction fragment length polymorphism method and an international comparison suggest that the predominance of the genera Prevotella and Veillonella in the salivary microbiota is attributable to periodontal disease conditions, and that the predominance of the genus Neisseria indicates healthy periodontal conditions. Furthermore, we recently used next-generation sequencing technology to perform a detailed large-scale analysis of the salivary microbiota...
2017: Journal of Oral Science
https://www.readbyqxmd.com/read/28630705/physiological-effects-of-stress-related-to-helicopter-travel-in-federal-emergency-management-agency-search-and-rescue-canines
#9
E Perry, N Gulson, T-W Liu Cross, K S Swanson
Working canines are deployed by the Federal Emergency Management Agency (FEMA), as part of a National Disaster Response Plan. Stress associated with helicopter flight and the resulting physical effects on the dog are unknown. Our objective was to test the hypotheses that (1) helicopter travel affects the physiology and faecal microbiota of working canines, but that (2) physiological consequences of helicopter travel will not negatively affect their work performance. A total of nine FEMA canines were loaded onto helicopters and flown for 30 min in July 2015...
2017: Journal of Nutritional Science
https://www.readbyqxmd.com/read/28553275/host-immune-selection-of-rumen-bacteria-through-salivary-secretory-iga
#10
Janelle M Fouhse, Luke Smiegielski, Melanie Tuplin, Le Luo Guan, Benjamin P Willing
The rumen microbiome is integral to efficient production in cattle and shows strong host specificity, yet little is known about what host factors shape rumen microbial composition. Secretory immunoglobulin A (SIgA) is produced in large amounts in the saliva, can coat both commensal and pathogenic microbes within the gut, and presents a plausible mechanism of host specificity. However, the role salivary SIgA plays in commensal bacteria selection in ruminants remains elusive. The main objectives of this study were to develop an immuno-affinity benchtop method to isolate SIgA-tagged microbiota and to determine if salivary SIgA preferentially binds selected bacteria...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28383398/effect-of-probiotics-on-digestibility-and-immunity-in-infants-a-study-protocol-for-a-randomized-controlled-trial
#11
RANDOMIZED CONTROLLED TRIAL
Lingli Xiao, Guodong Ding, Yifang Ding, Chaoming Deng, Xiaolei Ze, Liang Chen, Yao Zhang, Lihua Song, Hongli Yan, Fang Liu, Xiaoming Ben
The gastrointestinal (GI) tract of a fetus in utero is sterile but it becomes colonized with environmental microorganisms shortly after birth. Since the gut microbiota undergoes substantial changes in early life, healthy gut microflora is essential to an infant's gut health and immune system and probably also has an effect on overall health status in later life. Probiotics, defined as viable microbial preparations that have a beneficial effect on the health of the host, represent a rapidly expanding field. Although randomized controlled trials using probiotics in infants have shown promising results in the prevention and treatment of common diseases such as diarrhea and allergy, little is known about whether probiotics could offer benefits to healthy infants...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28369125/relative-abundance-of-total-subgingival-plaque-specific-bacteria-in-salivary-microbiota-reflects-the-overall-periodontal-condition-in-patients-with-periodontitis
#12
Shinya Kageyama, Toru Takeshita, Mikari Asakawa, Yukie Shibata, Kenji Takeuchi, Wataru Yamanaka, Yoshihisa Yamashita
Increasing attention is being focused on evaluating the salivary microbiota as a promising method for monitoring oral health; however, its bacterial composition greatly differs from that of dental plaque microbiota, which is a dominant etiologic factor of oral diseases. This study evaluated the relative abundance of subgingival plaque-specific bacteria in the salivary microbiota and examined a relationship between the abundance and severity of periodontal condition in patients with periodontitis. Four samples (subgingival and supragingival plaques, saliva, and tongue coating) per each subject were collected from 14 patients with a broad range of severity of periodontitis before periodontal therapy...
2017: PloS One
https://www.readbyqxmd.com/read/28358023/relevance-of-secretor-status-genotype-and-microbiota-composition-in-susceptibility-to-rotavirus-and-norovirus-infections-in-humans
#13
Jesús Rodríguez-Díaz, Izaskun García-Mantrana, Susana Vila-Vicent, Roberto Gozalbo-Rovira, Javier Buesa, Vicente Monedero, Maria Carmen Collado
Host genetic factors, such as histo-blood group antigens (HBGAs), are associated with susceptibility to norovirus (NoV) and rotavirus (RV) infections. Recent advances point to the gut microbiome as a key player necessary for a viral pathogen to cause infection. In vitro NoV attachment to host cells and resulting infections have been linked to interactions with certain bacterial types in the gut microbiota. We investigated the relationship between host genotype, gut microbiota, and viral infections. Saliva and fecal samples from 35 adult volunteers were analysed for secretor status genotype, the gut microbiota composition by 16S rRNA gene sequencing, and salivary IgA titers to NoV and RV...
March 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28342734/integration-of-microbiome-and-epigenome-to-decipher-the-pathogenesis-of-autoimmune-diseases
#14
REVIEW
Beidi Chen, Luxi Sun, Xuan Zhang
The interaction between genetic predisposition and environmental factors are of great significance in the pathogenesis and development of autoimmune diseases (AIDs). The human mucosa is the most frequent site that interacts with the exterior environment, and commensal microbiota at the gut and other human mucosal cavities play a crucial role in the regulation of immune system. Growing evidence has shown that the compositional and functional changes of mucosal microbiota are closely related to AIDs. Gut dysbiosis not only influence the expression level of Toll-like receptors (TLRs) of antigen presenting cells, but also contribute to Th17/Treg imbalance...
March 23, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28326153/salivary-microbiota-in-individuals-with-different-levels-of-caries-experience
#15
Daniel Belstrøm, Palle Holmstrup, Nils-Erik Fiehn, Nikolai Kirkby, Alexis Kokaras, Bruce J Paster, Allan Bardow
This study compared salivary bacterial profiles in two groups having a 10-fold difference in levels of caries experience, as it was hypothesized that the composition of the salivary microbiota might associate with the levels of caries experience. Bacterial profiles in stimulated saliva samples from 85 individuals with low levels of caries experience (healthy group) and 79 individuals with high levels of caries experience (caries group) were analyzed by means of the Human Oral Microbiome Identification Next Generation Sequencing (HOMINGS) technique...
2017: Journal of Oral Microbiology
https://www.readbyqxmd.com/read/28319129/changes-in-salivary-microbiota-increase-volatile-sulfur-compounds-production-in-healthy-male-subjects-with-academic-related-chronic-stress
#16
Bruno Dias Nani, Patricia Oliveira de Lima, Fernanda Klein Marcondes, Francisco Carlos Groppo, Gustavo Sattolo Rolim, Antonio Bento Alves de Moraes, Karina Cogo-Müller, Michelle Franz-Montan
OBJECTIVE: To investigate the associations among salivary bacteria, oral emanations of volatile sulfur compounds, and academic-related chronic stress in healthy male subjects. MATERIALS AND METHODS: Seventy-eight healthy male undergraduate dental students were classified as stressed or not by evaluation of burnout, a syndrome attributed to academic-related chronic stress. This evaluation was carried out using the Maslach Burnout Inventory-Student Survey questionnaire...
2017: PloS One
https://www.readbyqxmd.com/read/28318170/-application-of-saliva-in-disease-diagnosis
#17
REVIEW
Cheng Xingqun, Zhou Xuedong, Xu Xin
Saliva is secreted by salivary glands and performs a variety of functions, including mouth cleaning and protection, antibacterial activity, and digestion. With the rapid progress in salivaomics, saliva became recognized as a potential pool of biological markers. Being a non-invasive and safe source, saliva is a potential substitute for blood in diagnosis and prognosis of diseases. This review summarizes the latest advancement in saliva-related studies and presents the potential value of saliva in early diagnosis of oral diseases, such as dental caries, periodontal disease, cancer, diabetes, and other systemic disorders...
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28254014/the-role-of-saliva-in-aroma-release-and-perception
#18
REVIEW
Sarah Ployon, Martine Morzel, Francis Canon
Aroma perception is an important factor driving food acceptance. Volatile organic compounds (VOCs) are released from the food matrix and then reach the receptors located in the nasal cavity, leading to their perception. These steps are closely dependent on the physicochemical properties of the volatile compounds and the food matrix, but also on human physiology. Among the different physiological parameters involved, the literature reports that saliva has various effects on VOCs and therefore appears as a major actor impacting the perception of aroma...
July 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28220901/distinct-signatures-of-dental-plaque-metabolic-byproducts-dictated-by-periodontal-inflammatory-status
#19
Akito Sakanaka, Masae Kuboniwa, Ei Hashino, Takeshi Bamba, Eiichiro Fukusaki, Atsuo Amano
Onset of chronic periodontitis is associated with an aberrant polymicrobial community, termed dysbiosis. Findings regarding its etiology obtained using high-throughput sequencing technique suggested that dysbiosis holds a conserved metabolic signature as an emergent property. The purpose of this study was to identify robust biomarkers for periodontal inflammation severity. Furthermore, we investigated disease-associated metabolic signatures of periodontal microbiota using a salivary metabolomics approach. Whole saliva samples were obtained from adult subjects before and after removal of supragingival plaque (debridement)...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28197769/confounding-effects-of-microbiome-on-the-susceptibility-of-tnfsf15-to-crohn-s-disease-in-the-ryukyu-islands
#20
Shigeki Nakagome, Hiroshi Chinen, Atsushi Iraha, Akira Hokama, Yasuaki Takeyama, Shotaro Sakisaka, Toshiyuki Matsui, Judith R Kidd, Kenneth K Kidd, Heba S Said, Wataru Suda, Hidetoshi Morita, Masahira Hattori, Tsunehiko Hanihara, Ryosuke Kimura, Hajime Ishida, Jiro Fujita, Fukunori Kinjo, Shuhei Mano, Hiroki Oota
Crohn's disease (CD) involves chronic inflammation in the gastrointestinal tract due to dysregulation of the host immune response to the gut microbiome. Even though the host-microbiome interactions are likely contributors to the development of CD, a few studies have detected genetic variants that change bacterial compositions and increase CD risk. We focus on one of the well-replicated susceptible genes, tumor necrosis factor superfamily member 15 (TNFSF15), and apply statistical analyses for personal profiles of genotypes and salivary microbiota collected from CD cases and controls in the Ryukyu Islands, southernmost islands of the Japanese archipelago...
April 2017: Human Genetics
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