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Obesity and Microbiome

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https://www.readbyqxmd.com/read/28728934/beyond-body-mass-index-obesity-and-lung-disease
#1
REVIEW
Ubong Peters, Benjamin T Suratt, Jason H T Bates, Anne E Dixon
The worldwide prevalence of obesity has increased rapidly in the last three decades, and this has led to important changes in the pathogenesis and clinical presentation of many common diseases. This review article examines the relationship between obesity and lung disease, highlighting some of the major findings that have advanced our understanding of the mechanisms contributing to this relationship. Changes in pulmonary function related to fat mass are important, but obesity is much more than simply a state of mass loading, and body mass index is only a very indirect measure of metabolic health...
July 17, 2017: Chest
https://www.readbyqxmd.com/read/28727115/the-microbiota-gut-brain-axis-as-a-key-regulator-of-neural-function-and-the-stress-response-implications-for-human-and-animal-health
#2
N C Wiley, T G Dinan, R P Ross, C Stanton, G Clarke, J F Cryan
The brain-gut-microbiota axis comprises an extensive communication network between the brain, the gut, and the microbiota residing there. Development of a diverse gut microbiota is vital for multiple features of behavior and physiology, as well as many fundamental aspects of brain structure and function. Appropriate early-life assembly of the gut microbiota is also believed to play a role in subsequent emotional and cognitive development. If the composition, diversity, or assembly of the gut microbiota is impaired, this impairment can have a negative impact on host health and lead to disorders such as obesity, diabetes, inflammatory diseases, and even potentially neuropsychiatric illnesses, including anxiety and depression...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28724659/human-milk-microbial-community-structure-is-relatively-stable-and-related-to-variations-in-macronutrient-and-micronutrient-intakes-in-healthy-lactating-women
#3
Janet E Williams, Janae M Carrothers, Kimberly A Lackey, Nicola F Beatty, Mara A York, Sarah L Brooker, Bahman Shafii, William J Price, Matthew L Settles, Mark A McGuire, Michelle K McGuire
Background: The human milk microbiome has been somewhat characterized, but little is known about changes over time and relations with maternal factors such as nutrient intake.Objective: We sought to characterize the human milk microbiome and described associations with maternal nutrient intake, time postpartum, delivery mode, and body mass index (BMI; in kg/m(2)).Methods: Milk samples (n = 104) and 24-h diet recalls were collected 9 times from 21 healthy lactating women from day 2 to 6 mo postpartum. Women were classified by BMI as healthy weight (<25) or overweight or obese (≥25)...
July 19, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28724546/high-protein-diet-promotes-sensitivity-to-cholecystokinin-and-shifts-the-cecal-microbiome-without-altering-brain-inflammation-in-diet-induced-obesity-in-rats
#4
Lixin Wang, Jonathan P Jacobs, Venu Lagishetty, Pu-Qing Yuan, Shuping Vincent Wu, Mulugeta Million, Joseph R Reeve, Joseph R Pisegna, Yvette Taché
High protein diet (HPD) curtails obesity and/or fat mass but it is unknown whether it reverses neuroinflammation, altered glucose levels, cholecystokinin (CCK) sensitivity and gut microbiome in rats fed a Western diet (WD)-induced obesity (DIO). Male rats fed a WD (high fat and sugar) for 12 weeks were switched to a HPD for 6 weeks. Body composition, food intake, meal pattern, sensitivity to intraperitoneal CCK-8S, blood glucose, brain signaling, and cecal microbiota were assessed. Compared to normal diet, WD increased body weight (9...
July 19, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28723981/intestinal-microbiota-in-digestive-diseases
#5
Maria do Carmo Friche Passos, Joaquim Prado Moraes-Filho
BACKGROUND: In recent years, especially after the development of sophisticated metagenomic studies, research on the intestinal microbiota has increased, radically transforming our knowledge about the microbiome and its association with health maintenance and disease development in humans. Increasing evidence has shown that a permanent alteration in microbiota composition or function (dysbiosis) can alter immune responses, metabolism, intestinal permeability, and digestive motility, thereby promoting a proinflammatory state...
July 6, 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28717234/dietary-lipid-content-reorganizes-gut-microbiota-and-probiotic-l-rhamnosus-attenuates-obesity-and-enhances-catabolic-hormonal-milieu-in-zebrafish
#6
Silvia Falcinelli, Ana Rodiles, Azadeh Hatef, Simona Picchietti, Lina Cossignani, Daniel L Merrifield, Suraj Unniappan, Oliana Carnevali
In the present study, we explored whether dietary lipid content influences the gut microbiome in adult zebrafish. Diets containing three different lipid levels (high [HFD], medium [MFD], and low [LFD]) were administered with or without the supplementation of Lactobacillus rhamnosus (P) to zebrafish in order to explore how the dietary lipid content may influence the gut microbiome. Dietary lipid content shifted the gut microbiome structure. The addition of L. rhamnosus in the diets, induced transcriptional reduction of orexigenic genes, upregulation of anorexigenic genes, and transcriptional decrease of genes involved in cholesterol and triglyceride (TAG) metabolism, concomitantly with lower content of cholesterol and TAG...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28708466/a-bidirectional-association-between-the-gut-microbiota-and-cns-disease-in-a-biphasic-murine-model-of-multiple-sclerosis
#7
Sara L Colpitts, Eli J Kasper, Abigail Keever, Caleb Liljenberg, Trevor Kirby, Krisztian Magori, Lloyd H Kasper, Javier Ochoa-Repáraz
The gut microbiome plays an important role in the development of inflammatory disease as shown using experimental models of central nervous system (CNS) demyelination. Gut microbes influence the response of regulatory immune cell populations in the gut-associated lymphoid tissue (GALT), which drive protection in acute and chronic experimental autoimmune encephalomyelitis (EAE). Recent observations suggest that communication between the host and the gut microbiome is bidirectional. We hypothesized that the gut microbiota differs between the acute inflammatory and chronic progressive stages of a murine model of secondary-progressive multiple sclerosis (SP-MS)...
July 14, 2017: Gut Microbes
https://www.readbyqxmd.com/read/28706193/polydextrose-changes-the-gut-microbiome-and-attenuates-fasting-triglyceride-and-cholesterol-levels-in-western-diet-fed-mice
#8
Ghulam Shere Raza, Heli Putaala, Ashley A Hibberd, Esa Alhoniemi, Kirsti Tiihonen, Kari Antero Mäkelä, Karl-Heinz Herzig
Obesity and dyslipidemia are hallmarks of metabolic and cardiovascular diseases. Polydextrose (PDX), a soluble fiber has lipid lowering effects. We hypothesize that PDX reduces triglycerides and cholesterol by influencing gut microbiota, which in turn modulate intestinal gene expression. C57BL/6 male mice were fed a Western diet (WD) ±75 mg PDX twice daily by oral gavage for 14 days. Body weight and food intake were monitored daily. Fasting plasma lipids, caecal microbiota and gene expression in intestine and liver were measured after 14 days of feeding...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28704544/effect-of-acute-ozone-exposure-on-the-lung-metabolomes-of-obese-and-lean-mice
#9
Joel Andrew Mathews, David Itiro Kasahara, Youngji Cho, Lauren Nicole Bell, Philip Ross Gunst, Edward D Karoly, Stephanie Ann Shore
Pulmonary responses to the air pollutant, ozone, are increased in obesity. Both obesity and ozone cause changes in systemic metabolism. Consequently, we examined the impact of ozone on the lung metabolomes of obese and lean mice. Lean wildtype and obese db/db mice were exposed to acute ozone (2 ppm for 3 h) or air. 24 hours later, the lungs were excised, flushed with PBS to remove blood and analyzed via liquid-chromatography or gas-chromatography coupled to mass spectrometry for metabolites. Both obesity and ozone caused changes in the lung metabolome...
2017: PloS One
https://www.readbyqxmd.com/read/28704429/effects-of-coconut-oil-on-glycemia-inflammation-and-urogenital-microbial-parameters-in-female-ossabaw-mini-pigs
#10
Annie E Newell-Fugate, Katherine Lenz, Cassandra Skenandore, Romana A Nowak, Bryan A White, Andrea Braundmeier-Fleming
Forty percent of American women are obese and at risk for type II diabetes, impaired immune function, and altered microbiome diversity, thus impacting overall health. We investigated whether obesity induced by an excess calorie, high fat diet containing hydrogenated fats, fructose, and coconut oil (HFD) altered glucose homeostasis, peripheral immunity, and urogenital microbial dynamics. We hypothesized that HFD would cause hyperglycemia, increase peripheral inflammation, and alter urogenital microbiota to favor bacterial taxonomy associated with inflammation...
2017: PloS One
https://www.readbyqxmd.com/read/28696041/the-contribution-of-microbial-biotechnology-to-sustainable-development-goals-microbiome-therapies
#11
Paul W O'Toole, Max Paoli
Complex communities of microbes live on and in plants, humans and other animals. These communities are collectively referred to as the microbiota or microbiome. Plants and animals evolved to co-exist with these microbes. In mammals, particular kinds of alteration of the microbiome (dysbiosis) are associated with loss of health, most likely due to loss of microbial metabolites, signalling molecules, or regulators of host pathways. Modern life-style diseases such as Inflammatory Bowel Disease (IBD), Irritable Bowel Syndrome (IBS), type 2 diabetes, obesity and metabolic syndrome have been linked to dysbiosis...
July 11, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28696008/sustainable-therapies-by-engineered-bacteria
#12
Beatriz Álvarez, Luis Ángel Fernández
The controlled in situ delivery of biologics (e.g. enzymes, cytokines, antibodies) by engineered bacteria of our microbiome will allow the sustainable production of these complex and expensive drugs locally in the human body, overcoming many of the technical and economical barriers currently associated with the global use of these potent medicines. We provide examples showing how engineered bacteria can be effective treatments against multiple pathologies, including autoimmune and inflammatory diseases, metabolic disorders, diabetes, obesity, infectious diseases and cancer, hence contributing to achieve the Global Sustainable Goal 3: ensure healthy lives and promote well-being for all at all ages...
July 11, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28685768/obesity-gut-microbiome-and-serum-metabolome-changes
#13
Claire Greenhill
No abstract text is available yet for this article.
July 7, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28683308/microbial-host-co-metabolites-are-prodromal-markers-predicting-phenotypic-heterogeneity-in-behavior-obesity-and-impaired-glucose-tolerance
#14
Marc-Emmanuel Dumas, Alice R Rothwell, Lesley Hoyles, Thomas Aranias, Julien Chilloux, Sophie Calderari, Elisa M Noll, Noémie Péan, Claire L Boulangé, Christine Blancher, Richard H Barton, Quan Gu, Jane F Fearnside, Chloé Deshayes, Christophe Hue, James Scott, Jeremy K Nicholson, Dominique Gauguier
The influence of the gut microbiome on metabolic and behavioral traits is widely accepted, though the microbiome-derived metabolites involved remain unclear. We carried out untargeted urine (1)H-NMR spectroscopy-based metabolic phenotyping in an isogenic C57BL/6J mouse population (n = 50) and show that microbial-host co-metabolites are prodromal (i.e., early) markers predicting future divergence in metabolic (obesity and glucose homeostasis) and behavioral (anxiety and activity) outcomes with 94%-100% accuracy...
July 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/28677210/gut-microbiome-diversity-influenced-more-by-the-westernized-dietary-regime-than-the-body-mass-index-as-assessed-using-effect-size-statistic
#15
Shannon C Davis, Jagjit S Yadav, Stephanie D Barrow, Boakai K Robertson
Human gut microbiome dysbiosis has been associated with the onset of metabolic diseases and disorders. However, the critical factors leading to dysbiosis are poorly understood. In this study, we provide increasing evidence of the association of diet type and body mass index (BMI) and how they relatively influence the taxonomic structure of the gut microbiota with respect to the causation of gut microbiome dysbiosis. The study included randomly selected Alabama residents (n = 81), including females (n = 45) and males (n = 36)...
July 4, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28676106/comparative-analysis-of-gut-microbiota-associated-with-body-mass-index-in-a-large-korean-cohort
#16
Yeojun Yun, Han-Na Kim, Song E Kim, Seong Gu Heo, Yoosoo Chang, Seungho Ryu, Hocheol Shin, Hyung-Lae Kim
BACKGROUND: Gut microbiota plays an important role in the harvesting, storage, and expenditure of energy obtained from one's diet. Our cross-sectional study aimed to identify differences in gut microbiota according to body mass index (BMI) in a Korean population. 16S rRNA gene sequence data from 1463 subjects were categorized by BMI into normal, overweight, and obese groups. Fecal microbiotas were compared to determine differences in diversity and functional inference analysis related with BMI...
July 4, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28673568/metformin-exerts-anti-obesity-effect-via-gut-microbiome-modulation-in-prediabetics-a-hypothesis
#17
Kunal Maniar, Amal Moideen, Rajasri Bhattacharyya, Dibyajyoti Banerjee
Prediabetic individuals are characterized by high levels of insulin, an anabolic hormone having an important role in the maintenance of glucose homeostasis. However, insulin has also been found to increase the growth of certain bacteria which form the non-butyrate producing part of the gut microbiome. The gut microbiome is recently in focus for its strong association with many chronic diseases such as type 2 diabetes mellitus and obesity. Metformin, a widely popular anti-diabetic medication has been shown to prevent weight gain in many trials...
July 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28662756/effect-of-antibiotic-administration-during-infancy-on-growth-curves-through-young-adulthood-in-rhesus-macaques-macaca-mulatta
#18
Heather M Sidener, Byung Park, Lina Gao
Recent human studies indicate a possible correlation between the administration of antibiotics during early life and the risk of later obesity, potentially due to antibiotic-induced alteration of the gastrointestinal microbiome. In humans, the risk of obesity increases with multiple courses of antibiotics and when fetuses or infants are treated with broad-spectrum and macrolide antibiotics. In addition, the obesity risk in humans seems higher for males than females. We used a retrospective, case-control, matched-pair study design to evaluate health records for 99 control-matched pairs of rhesus macaques (Macaca mulatta) from an outdoor breeding colony...
June 1, 2017: Comparative Medicine
https://www.readbyqxmd.com/read/28659968/the-human-microbiome-and-the-missing-heritability-problem
#19
Santiago Sandoval-Motta, Maximino Aldana, Esperanza Martínez-Romero, Alejandro Frank
The "missing heritability" problem states that genetic variants in Genome-Wide Association Studies (GWAS) cannot completely explain the heritability of complex traits. Traditionally, the heritability of a phenotype is measured through familial studies using twins, siblings and other close relatives, making assumptions on the genetic similarities between them. When this heritability is compared to the one obtained through GWAS for the same traits, a substantial gap between both measurements arise with genome wide studies reporting significantly smaller values...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28646079/identification-of-flavin-containing-monooxygenase-5-fmo5-as-a-regulator-of-glucose-homeostasis-and-a-potential-sensor-of-gut-bacteria
#20
Flora Scott, Sandra G Gonzalez Malagon, Brett A O'Brien, Diede Fennema, Sunil Veeravalli, Clarissa R Coveney, Ian R Phillips, Elizabeth A Shephard
We have previously identified flavin-containing monooxygenase 5 (FMO5) as a regulator of metabolic ageing. The aim of the present study was to investigate the role of FMO5 in glucose homeostasis and the impact of diet and gut flora on the phenotype of mice in which the Fmo5 gene has been disrupted (Fmo5(-/-) mice). In comparison with wild-type (WT) counterparts, Fmo5(-/-) mice are resistant to age-related changes in glucose homeostasis and maintain the higher glucose tolerance and insulin sensitivity characteristic of young animals...
June 23, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
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