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Gut microbiota and diabetes

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https://www.readbyqxmd.com/read/28643167/microbiome-probiotics-and-neurodegenerative-diseases-deciphering-the-gut-brain-axis
#1
REVIEW
Susan Westfall, Nikita Lomis, Imen Kahouli, Si Yuan Dia, Surya Pratap Singh, Satya Prakash
The gut microbiota is essential to health and has recently become a target for live bacterial cell biotherapies for various chronic diseases including metabolic syndrome, diabetes, obesity and neurodegenerative disease. Probiotic biotherapies are known to create a healthy gut environment by balancing bacterial populations and promoting their favorable metabolic action. The microbiota and its respective metabolites communicate to the host through a series of biochemical and functional links thereby affecting host homeostasis and health...
June 22, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28641031/treatment-options-for-nonalcoholic-steatohepatitis-a-safety-evaluation
#2
Danny Issa, Julia Wattacheril, Arun J Sanyal
Introduction There is an urgent as yet unmet need to develop highly effective and safe therapeutics for nonalcoholic fatty liver disease (NAFLD). The remarkable progress in understanding NAFLD pathogenesis allowed the identification of injury pathways which may be recruited as therapy targets. Areas covered This article reviews the safety and tolerability data of the NAFLD therapies and explains the mechanistic basis for each of the established and investigational drugs. Treatment targets include: weight loss, anti-metabolic agents such as lipid lowering and anti-diabetic drugs, inflammation, fibrosis and others such as targeting gut microbiota, immune modulation and apoptosis...
June 22, 2017: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/28637406/socioeconomic-status-the-missing-link-between-obesity-and-diabetes-mellitus
#3
Alexei Volaco, Ana Maria Cavalcanti, Roberto Pecoits Filho, Dalton Bertolim Précoma
BACKGROUND: Currently, there is an epidemic expansion of the obesity rates worldwide. The increasing number of obese individuals associated with the aging of population leads to increasing number of individuals with type 2 diabetes mellitus (T2DM) at the same rate. The traditional factors that link obesity to T2DM are related to genetics, hypercaloric diet, sedentary lifestyle, and stress. Individuals from lower socioeconomic status (SES) have restricted autonomy and opportunities that could lead to more stress and consequently increase in stress hormones, such as cortisol, catecholamines, glucagon, and growth hormone, which might ultimately change fat deposition, increasing visceral fat and increasing the risk of T2DM mellitus development...
June 21, 2017: Current Diabetes Reviews
https://www.readbyqxmd.com/read/28636934/the-tmao-producing-enzyme-flavin-containing-monooxygenase-3-regulates-obesity-and-the-beiging-of-white-adipose-tissue
#4
Rebecca C Schugar, Diana M Shih, Manya Warrier, Robert N Helsley, Amy Burrows, Daniel Ferguson, Amanda L Brown, Anthony D Gromovsky, Markus Heine, Arunachal Chatterjee, Lin Li, Xinmin S Li, Zeneng Wang, Belinda Willard, YongHong Meng, Hanjun Kim, Nam Che, Calvin Pan, Richard G Lee, Rosanne M Crooke, Mark J Graham, Richard E Morton, Carl D Langefeld, Swapan K Das, Lawrence L Rudel, Nizar Zein, Arthur J McCullough, Srinivasan Dasarathy, W H Wilson Tang, Bernadette O Erokwu, Chris A Flask, Markku Laakso, Mete Civelek, Sathyamangla V Naga Prasad, Joerg Heeren, Aldons J Lusis, Stanley L Hazen, J Mark Brown
Emerging evidence suggests that microbes resident in the human intestine represent a key environmental factor contributing to obesity-associated disorders. Here, we demonstrate that the gut microbiota-initiated trimethylamine N-oxide (TMAO)-generating pathway is linked to obesity and energy metabolism. In multiple clinical cohorts, systemic levels of TMAO were observed to strongly associate with type 2 diabetes. In addition, circulating TMAO levels were associated with obesity traits in the different inbred strains represented in the Hybrid Mouse Diversity Panel...
June 20, 2017: Cell Reports
https://www.readbyqxmd.com/read/28615382/factors-influencing-the-gut-microbiota-inflammation-and-type-2-diabetes
#5
REVIEW
Li Wen, Andrew Duffy
The gut microbiota is a complex community of bacteria residing in the intestine. Animal models have demonstrated that several factors contribute to and can significantly alter the composition of the gut microbiota, including genetics; the mode of delivery at birth; the method of infant feeding; the use of medications, especially antibiotics; and the diet. There may exist a gut microbiota signature that promotes intestinal inflammation and subsequent systemic low-grade inflammation, which in turn promotes the development of type 2 diabetes...
June 14, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28609252/fecal-microbiota-transplantation-in-metabolic-syndrome-history-present-and-future
#6
P F de Groot, M N Frissen, N C de Clercq, M Nieuwdorp
The history of fecal microbiota transplantation (FMT) dates back even to ancient China. Recently, scientific studies have been looking into FMT as a promising treatment of various diseases, while in the process teaching us about the interaction between the human host and its resident microbial communities. Current research focuses mainly on Clostridium difficile infections, however interest is rising in other areas such as inflammatory bowel disease (IBD) and the metabolic syndrome. With regard to the latter, the intestinal microbiota might be causally related to the progression of insulin resistance and diabetes...
May 4, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28597812/microbial-impact-on-host-metabolism-opportunities-for-novel-treatments-of-nutritional-disorders
#7
Hubert Plovier, Patrice D Cani
Malnutrition is the cause of major public health concerns worldwide. On the one hand, obesity and associated pathologies (also known as the metabolic syndrome) affect more than 10% of the world population. Such pathologies might arise from an elevated inflammatory tone. We have discovered that the inflammatory properties of high-fat diets were linked to the translocation of lipopolysaccharide (LPS). We proposed a mechanism associating the gut microbiota with the onset of insulin resistance and low-grade inflammation, a phenomenon that we called "metabolic endotoxemia...
June 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28594855/the-artificial-sweetener-acesulfame-potassium-affects-the-gut-microbiome-and-body-weight-gain-in-cd-1-mice
#8
Xiaoming Bian, Liang Chi, Bei Gao, Pengcheng Tu, Hongyu Ru, Kun Lu
Artificial sweeteners have been widely used in the modern diet, and their observed effects on human health have been inconsistent, with both beneficial and adverse outcomes reported. Obesity and type 2 diabetes have dramatically increased in the U.S. and other countries over the last two decades. Numerous studies have indicated an important role of the gut microbiome in body weight control and glucose metabolism and regulation. Interestingly, the artificial sweetener saccharin could alter gut microbiota and induce glucose intolerance, raising questions about the contribution of artificial sweeteners to the global epidemic of obesity and diabetes...
2017: PloS One
https://www.readbyqxmd.com/read/28592385/nucleotide-binding-oligomerization-domain-containing-protein-2-nod2-modulates-t1dm-susceptibility-by-gut-microbiota
#9
Yang-Yang Li, James A Pearson, Chen Chao, Jian Peng, Xiaojun Zhang, Zhiguang Zhou, Yu Liu, F Susan Wong, Li Wen
Nucleotide-binding oligomerization domain-containing protein 2 (Nod2) is an innate immune receptor. To investigate the role of Nod2 in susceptibility to the autoimmune disease, type 1 diabetes mellitus (T1DM), we generated Nod2(-/-) non-obese diabetic (NOD) mice. The Nod2(-/-)NOD mice had different composition of the gut microbiota compared to Nod2(+/+)NOD mice and were significantly protected from diabetes, but only when housed separately from Nod2(+/+)NOD mice. This suggested that T1DM susceptibility in Nod2(-/-)NOD mice is dependent on the alteration of gut microbiota, which modulated the frequency and function of IgA-secreting B-cells and IL-10 promoting T-regulatory cells...
June 4, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28585563/global-metabolic-interaction-network-of-the-human-gut-microbiota-for-context-specific-community-scale-analysis
#10
Jaeyun Sung, Seunghyeon Kim, Josephine Jill T Cabatbat, Sungho Jang, Yong-Su Jin, Gyoo Yeol Jung, Nicholas Chia, Pan-Jun Kim
A system-level framework of complex microbe-microbe and host-microbe chemical cross-talk would help elucidate the role of our gut microbiota in health and disease. Here we report a literature-curated interspecies network of the human gut microbiota, called NJS16. This is an extensive data resource composed of ∼570 microbial species and 3 human cell types metabolically interacting through >4,400 small-molecule transport and macromolecule degradation events. Based on the contents of our network, we develop a mathematical approach to elucidate representative microbial and metabolic features of the gut microbial community in a given population, such as a disease cohort...
June 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28574058/gut-microbiota-trust-your-gut-metformin-and-diabetes
#11
Conor A Bradley
No abstract text is available yet for this article.
June 2, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28571659/gut-microbiota-endocrine-disrupting-chemicals-and-the-diabetes-epidemic
#12
REVIEW
Ganesan Velmurugan, Tharmarajan Ramprasath, Mithieux Gilles, Krishnan Swaminathan, Subbiah Ramasamy
Diabetes is rapidly emerging as one of the biggest health concerns worldwide, with profound implications for disability, mortality, and costs. This suddenly escalating rate of diabetes correlates with global industrialization and the production of plastics, pesticides, synthetic fertilizers, electronic waste, and food additives that release endocrine-disrupting chemicals (EDCs) into the environment and the food chain. Emerging evidence indicates an association between exposure of EDCs and diabetes. In humans, these chemicals are also metabolized by the gut microbiota and thereby their toxicodynamics are altered...
May 29, 2017: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/28559590/gut-microbiota-trust-your-gut-metformin-and-diabetes
#13
Conor A Bradley
No abstract text is available yet for this article.
May 31, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28556916/intestinal-dysbiosis-and-probiotic-applications-in-autoimmune-diseases
#14
REVIEW
Gislane Lelis Vilela de Oliveira, Aline Zazeri Leite, Bruna Stevanato Higuchi, Marina Ignácio Gonzaga, Vânia Sammartino Mariano
In humans, a complex interaction between the host immune system and commensal microbiota is required to maintain gut homeostasis. In this symbiotic relationship, the microbiota provides carbohydrate fermentation and digestion, vitamin synthesis, and gut-associated lymphoid tissue development, as well as prevents colonization by pathobionts, whereas the host offers a niche and nutrients for the survival of the microbiota. However, when this mutualistic relationship is compromised and an altered interaction between immune cells and microorganisms occurs, the gut microbiota may cause or contribute to the establishment of infectious diseases and trigger autoimmune diseases...
May 29, 2017: Immunology
https://www.readbyqxmd.com/read/28550681/antibiotic-associated-manipulation-of-the-gut-microbiota-and-phenotypic-restoration-in-nod-mice
#15
James R Fahey, Bonnie L Lyons, Haiyan L Olekszak, Anthony J Mourino, Jeremy J Ratiu, Jeremy J Racine, Harold D Chapman, David V Serreze, Dina L Baker, N Ken Hendrix
Segmented filamentous bacterium (SFB) a gram-positive, anaerobic, and intestinal commensal organism directly influencesthe development of Th17 helper cells in the small intestine of mice. In NOD mice, SFB colonization interferes with the developmentof type 1 diabetes (T1D), a T-cell-mediated autoimmune disease, suggesting that SFB may influence Th17 cells to inhibit Th1populations associated with the anti-β-cell immune response. This effect is a serious concern for investigators who use NOD micefor diabetes research because the expected incidence of disease decreases markedly when they are colonized by SFB...
May 26, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28545248/ephedra-treated-donor-derived-gut-microbiota-transplantation-ameliorates-high-fat-diet-induced-obesity-in-rats
#16
Jing-Hua Wang, Bong-Soo Kim, Kyungsun Han, Hojun Kim
Changes in gut microbiota (GM) are closely associated with metabolic syndrome, obesity, type 2 diabetes and so on. Several medicinal herbs, including Ephedra sinica (Es), have anti-obesity effects that ameliorate metabolic disorders. Therefore, in this study we evaluated whether Es maintains its anti-obesity effect through Es-altered gut microbiota (EsM) transplantation. GM was isolated from cecal contents of Es treated and untreated rats following repeated transplants into obese rats via oral gavage over three weeks...
May 23, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28540051/faecal-microbiota-transplantation-where-did-it-start-what-have-studies-taught-us-where-is-it-going
#17
REVIEW
Ryan M Chanyi, Laura Craven, Brandon Harvey, Gregor Reid, Michael J Silverman, Jeremy P Burton
The composition and activity of microorganisms in the gut, the microbiome, is emerging as an important factor to consider with regard to the treatment of many diseases. Dysbiosis of the normal community has been implicated in inflammatory bowel disease, Crohn's disease, diabetes and, most notoriously, Clostridium difficile infection. In Canada, the leading treatment strategy for recalcitrant C. difficile infection is to receive faecal material which by nature is filled with microorganisms and their metabolites, from a healthy individual, known as a faecal microbiota transplantation...
2017: SAGE Open Medicine
https://www.readbyqxmd.com/read/28530702/metformin-alters-the-gut-microbiome-of-individuals-with-treatment-naive-type-2-diabetes-contributing-to-the-therapeutic-effects-of-the-drug
#18
Hao Wu, Eduardo Esteve, Valentina Tremaroli, Muhammad Tanweer Khan, Robert Caesar, Louise Mannerås-Holm, Marcus Ståhlman, Lisa M Olsson, Matteo Serino, Mercè Planas-Fèlix, Gemma Xifra, Josep M Mercader, David Torrents, Rémy Burcelin, Wifredo Ricart, Rosie Perkins, José Manuel Fernàndez-Real, Fredrik Bäckhed
Metformin is widely used in the treatment of type 2 diabetes (T2D), but its mechanism of action is poorly defined. Recent evidence implicates the gut microbiota as a site of metformin action. In a double-blind study, we randomized individuals with treatment-naive T2D to placebo or metformin for 4 months and showed that metformin had strong effects on the gut microbiome. These results were verified in a subset of the placebo group that switched to metformin 6 months after the start of the trial. Transfer of fecal samples (obtained before and 4 months after treatment) from metformin-treated donors to germ-free mice showed that glucose tolerance was improved in mice that received metformin-altered microbiota...
May 22, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28524868/diabetes-associated-microbiota-in-fa-fa-rats-is-modified-by-roux-en-y-gastric-bypass
#19
Tulika Arora, Florian Seyfried, Neil G Docherty, Valentina Tremaroli, Carel W le Roux, Rosie Perkins, Fredrik Bäckhed
Roux-en-Y gastric bypass (RYGB) and duodenal jejunal bypass (DJB), two different forms of bariatric surgery, are associated with improved glucose tolerance, but it is not clear whether the gut microbiota contributes to this effect. Here we used fa/fa rats as a model of impaired glucose tolerance to investigate whether (i) the microbiota varies between fa/fa and nondiabetic fa/+ rats; (ii) the microbiota of fa/fa rats is affected by RYGB and/or DJB; and (iii) surgically induced microbiota alterations contribute to glucose metabolism...
May 19, 2017: ISME Journal
https://www.readbyqxmd.com/read/28511646/emergence-of-microbial-diversity-due-to-cross-feeding-interactions-in-a-spatial-model-of-gut-microbial-metabolism
#20
Milan J A van Hoek, Roeland M H Merks
BACKGROUND: The human gut contains approximately 10(14) bacteria, belonging to hundreds of different species. Together, these microbial species form a complex food web that can break down nutrient sources that our own digestive enzymes cannot handle, including complex polysaccharides, producing short chain fatty acids and additional metabolites, e.g., vitamin K. Microbial diversity is important for colonic health: Changes in the composition of the microbiota have been associated with inflammatory bowel disease, diabetes, obesity and Crohn's disease, and make the microbiota more vulnerable to infestation by harmful species, e...
May 16, 2017: BMC Systems Biology
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