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https://www.readbyqxmd.com/read/28344834/ligature-associated-bacterial-profiles-are-linked-to-type-2-diabetes-mellitus-in-a-rat-model-and-influenced-by-antibody-treatment-against-tnf-%C3%AE-or-rage
#1
M B Grauballe, D Belstrøm, J A Østergaard, B J Paster, S Schou, A Flyvbjerg, P Holmstrup
There is a bidirectional relationship between periodontal disease (PD) and type 2 diabetes mellitus (T2D). T2D may lead to ecological perturbations in the oral environment, which may facilitate an altered microbiota. However, previous studies have been inconclusive in determining the effect of T2D on oral bacterial profiles. Therefore, we aimed to evaluate the influence of T2D on the ligature-associated bacterial profile in a diabetic rat model with PD and investigated the impact of blocking inflammatory pathways with antibodies targeting either Tumor Necrosis Factor α (TNF-α) or the receptor of advanced glycation end-products (RAGE)...
February 2017: Clinical and Experimental Dental Research
https://www.readbyqxmd.com/read/28344333/stressor-exposure-has-prolonged-effects-on-colonic-microbial-community-structure-in-citrobacter-rodentium-challenged-mice
#2
Jeffrey D Galley, Amy R Mackos, Vanessa A Varaljay, Michael T Bailey
Stressor exposure significantly affects the colonic mucosa-associated microbiota, and exacerbates Citrobacter rodentium-induced inflammation, effects that can be attenuated with probiotic Lactobacillus reuteri. This study assessed the structure of the colonic mucosa-associated microbiota in mice exposed to a social stressor (called social disruption), as well as non-stressed control mice, during challenge with the colonic pathogen C. rodentium. Mice were exposed to the social stressor or home cage control conditions for six consecutive days and all mice were challenged with C...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28342908/intestinal-dendritic-cell-licensing-through-tlr4-is-required-for-oral-tolerance-in-allergic-contact-dermatitis
#3
Feriel Hacini-Rachinel, Mercedes Gomez de Agüero, Reem Kanjarawi, Ludovic Moro-Sibilot, Jean-Benoit Le Luduec, Claire Macari, Gilles Boschetti, Emilie Bardel, Philippe Langella, Bertrand Dubois, Dominique Kaiserlian
BACKGROUND: Induction of oral tolerance to haptens is an efficient way to prevent allergic contact dermatitis (ACD) in mice. Toll-like receptor (TLRs)-mediated sensing of the microbiota contributes to gut homeostasis, yet whether it contributes to induction of oral tolerance has not been documented. OBJECTIVE: We examined whether oral tolerance to the contact sensitizer DNFB depends on microbiota/TLRs and evaluated the role of TLR4 on the tolerogenic function of intestinal dendritic cells (DCs)...
March 22, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28342734/integration-of-microbiome-and-epigenome-to-decipher-the-pathogenesis-of-autoimmune-diseases
#4
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 22, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28341747/gut-symbiotic-microbes-imprint-intestinal-immune-cells-with-the-innate-receptor-slamf4-which-contributes-to-gut-immune-protection-against-enteric-pathogens
#5
Allison Cabinian, Daniel Sinsimer, May Tang, Youngsoon Jang, Bongkum Choi, Yasmina Laouar, Amale Laouar
BACKGROUND: Interactions between host immune cells and gut microbiota are crucial for the integrity and function of the intestine. How these interactions regulate immune cell responses in the intestine remains a major gap in the field. AIM: We have identified the signalling lymphocyte activation molecule family member 4 (SLAMF4) as an immunomodulator of the intestinal immunity. The aim is to determine how SLAMF4 is acquired in the gut and what its contribution to intestinal immunity is...
March 24, 2017: Gut
https://www.readbyqxmd.com/read/28337503/gut-microbiome-related-metabolic-changes-in-plasma-of-antibiotic-treated-rats
#6
C Behr, H Kamp, E Fabian, G Krennrich, W Mellert, E Peter, V Strauss, T Walk, I M C M Rietjens, B van Ravenzwaay
The intestinal microbiota contributes to the metabolism of its host. Adequate identification of the microbiota's impact on the host plasma metabolites is lacking. As antibiotics have a profound effect on the microbial composition and hence on the mammalian-microbiota co-metabolism, we studied the effects of antibiotics on the "functionality of the microbiome"-defined as the production of metabolites absorbed by the host. This metabolomics study presents insights into the mammalian-microbiome co-metabolism of endogenous metabolites...
March 23, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28337489/antibiotic-resistance-profiling-and-microbiota-of-the-upper-respiratory-tract-of-apparently-healthy-dogs-in-ibadan-south-west-nigeria
#7
Oluwafemi Babatunde Daodu, Elizabeth Adesola Amosun, Daniel Oladimeji Oluwayelu
BACKGROUND: Rearing of dogs and other pets has become increasingly popular in modern society. Bacterial flora resides within the nasal and oral cavities of dogs and when chanced, can be pathogenic. Certain similarities between humans and dogs portends dangerous behavioral habits that could lead to zoonotic disease transmission. This study was aimed at isolation, identification and antibiotic profiling of bacteria from nasal swabs of apparently healthy dogs. The zoonotic risk was also considered...
2017: African Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28337267/exploration-of-the-effect-of-probiotics-supplementation-on-intestinal-microbiota-of-food-allergic-mice
#8
Bo Yang, Liang Xiao, Sheng Liu, Xiaoyu Liu, Yan Luo, Qiongmei Ji, Pingchang Yang, Zhigang Liu
Environmental factor-induced alterations in intestinal microbiota have been demonstrated to be associated with increasing prevalence of food allergy. However, it is not clear to what extent oral administration of probiotics can affect gut microbiota composition, thus inhibiting food allergy development. Using ovalbumin (OVA)-sensitized murine model, it was demonstrated that probiotics ameliorated allergic symptoms, including reducing OVA specific-IgE, and -IgG1 levels in the serum, Th2 cytokines release in spleen, and occurrence of diarrhea...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28330600/the-chicken-or-the-egg-changes-in-oral-microbiota-as-cause-or-consequence-of-mucositis-during-radiation-therapy
#9
Stephen T Sonis
No abstract text is available yet for this article.
March 11, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28328083/oral-iron-supplementation-potential-implications-for-the-gut-microbiome-and-metabolome-in-patients-with-ckd
#10
Guus A M Kortman, Dorien Reijnders, Dorine W Swinkels
Patients with chronic kidney disease (CKD) and loss of kidney function are at increased risk for morbidity and mortality. The risks of CKD are attributed to "uremia," an increased concentration of uremic retention solutes (toxins) in the plasma. Recently, a colo-renal axis became clearly apparent and uremia has been associated with an altered gut microbiome composition and metabolism. There is a high prevalence of anemia in patients with CKD, for which patients are often treated with oral or intravenous iron...
March 22, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28326154/probiotic-lactobacillus-reuteri-has-antifungal-effects-on-oral-candida-species-in-vitro
#11
Mette Rose Jørgensen, Camilla Kragelund, Peter Østrup Jensen, Mette Kirstine Keller, Svante Twetman
Background: An alternative approach for managing Candida infections in the oral cavity by modulating the oral microbiota with probiotic bacteria has been proposed. Objective: The aim was to investigate the antifungal potential of the probiotic bacterium Lactobacillus reuteri (DSM 17938 and ATCC PTA 5289) against six oral Candida species (C. albicans, C. glabrata, C. krusei, C. tropicalis, C. dubliniensis, and C. parapsilosis). Design: The lactobacilli were tested for their ability to co-aggregate with and inhibit the growth of the yeasts assessed by spectrophotometry and the agar overlay inhibition assay...
2017: Journal of Oral Microbiology
https://www.readbyqxmd.com/read/28326153/salivary-microbiota-in-individuals-with-different-levels-of-caries-experience
#12
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/28326084/hiv-infection-and-compromised-mucosal-immunity-oral-manifestations-and-systemic-inflammation
#13
REVIEW
Samantha E Heron, Shokrollah Elahi
Mucosal surfaces account for the vast majority of HIV transmission. In adults, HIV transmission occurs mainly by vaginal and rectal routes but rarely via oral route. By contrast, pediatric HIV infections could be as the result of oral route by breastfeeding. As such mucosal surfaces play a crucial role in HIV acquisition, and spread of the virus depends on its ability to cross a mucosal barrier. HIV selectively infects, depletes, and/or dysregulates multiple arms of the human immune system particularly at the mucosal sites and causes substantial irreversible damage to the mucosal barriers...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28321827/effects-of-dietary-administration-of-shewanella-xiamenensis-a-1-aeromonas-veronii-a-7-and-bacillus-subtilis-single-or-combined-on-the-grass-carp-ctenopharyngodon-idella-intestinal-microbiota
#14
Kai Hao, Zhuo-Qi Wu, Dong-Liang Li, Xiao-Bo Yu, Gao-Xue Wang, Fei Ling
Gut microbiota of grass carp plays an important role in host. However, detailed information regarding the changes of microbiota after probiotics administration in relation to the gastrointestinal microbiota is absent. In the present study, dietary administration of putative probiotics Shewanella xiamenensis A-1, Aeromonas veronii A-7, and Bacillus subtilisstrains was conducted in grass carp to investigate if there is a discernible alteration in intestinal microbiota and whether the alteration is associated with previous study about the immunity regulation in grass carp...
March 21, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28320468/subgingival-microbiota-dysbiosis-in-systemic-lupus-erythematosus-association-with-periodontal-status
#15
Jôice Dias Corrêa, Débora Cerqueira Calderaro, Gilda Aparecida Ferreira, Santuza Maria Souza Mendonça, Gabriel R Fernandes, E Xiao, Antônio Lúcio Teixeira, Eugene J Leys, Dana T Graves, Tarcília Aparecida Silva
BACKGROUND: Periodontitis results from the interaction between a subgingival biofilm and host immune response. Changes in biofilm composition are thought to disrupt homeostasis between the host and subgingival bacteria resulting in periodontal damage. Chronic systemic inflammatory disorders have been shown to affect the subgingival microbiota and clinical periodontal status. However, this relationship has not been examined in subjects with systemic lupus erythematosus (SLE). The objective of our study was to investigate the influence of SLE on the subgingival microbiota and its connection with periodontal disease and SLE activity...
March 20, 2017: Microbiome
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
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/28317832/-variations-of-oral-fluid-microbiota-in-healthy-children-and-adolescents
#18
B N Davydov, A M Samoukina, E S Mikhailova, O A Gavrilova, Yu A Alekseeva
The aim of the study was to establish the bacterial and viral associations of saliva and the immune resistance in 127 healthy people of different ages. The analysis sorted out three variants of oral fluid microbiota differing by certain combination of indigenous and facultative microflora. It was found that with age there is a significant increase in the number of adolescents with the third variant of the microbiota, characterized by a decrease in the number of indigenous microflora and increase in opportunistic microorganisms and viruses...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28304209/subgingival-microbiota-in-caucasian-patients-with-desquamative-gingivitis-a-cross-sectional-study
#19
Paolo G Arduino, Federica Romano, Danilo Sasia, Roberto Broccoletti, Fulvio Ricceri, Anna Maria Barbui, Silvia Brossa, Raffaella Cipriani, Luca Cricenti, Marco Cabras, Mario Aimetti
BACKGROUND: The presence of epithelial desquamation, erythema, and erosions on the gingival tissue is usually described in literature as desquamative gingivitis (DG). A wide range of autoimmune/dermatological disorders can manifest as DG, although the two more common are oral lichen planus and mucous membrane pemphigoid. The aim of this study was to investigate the prevalence of 11 periodonto-pathogenic microorganisms in DG cases and to compare it with microbiologic status of individuals affected by plaque-induced gingivitis (GI)...
March 17, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28303827/characterisation-of-the-human-oral-microbiome-in-patients-with-coronary-artery-disease-using-next-generation-sequencing-of-16srrna-amplicons
#20
Thangam Menon, Sathya Narayanan Gopalakrishnan, Rayvathy Balasubramanian, Stalin Roy Justin
INTRODUCTION: Oral health is suspected to be linked to heart disease since species of bacteria that cause periodontitis and dental caries have been found in the atherosclerotic plaque in arteries in the heart. OBJECTIVES: The aim of this study was to characterize the oral microbiome in patients with coronary artery disease (CAD) and in a patient with dental caries (DC) without any clinical symptoms of CAD. METHODS: DNA was extracted from the oral swabs collected from the patients and sequencing was performed by next generation sequencing method using Illumina (MiSeq) platform...
January 2017: Indian Journal of Medical Microbiology
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