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Obesity gut

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https://www.readbyqxmd.com/read/29048927/early-origins-of-asthma-role-of-microbial-dysbiosis-and-metabolic-dysfunction
#1
Fernando D Martinez, Stefano Guerra
Asthma is a developmental disease that affects airway growth and is characterized by inappropriate responses to a variety of environmental stimuli. Recent advances point to two altered early life pathways as major determinants of asthma risk. In the "microbial" pathway, pre- and post-natal exposures to microbiota-loaded farm environments block gene-virus interactions (e.g., interactions between risk alleles in chromosome 17q21 and lower respiratory illnesses [LRI] by rhinovirus) that are associated with asthma development...
October 19, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29047231/alterations-in-gut-microbiota-and-immunity-by-dietary-fat
#2
REVIEW
Bo Gie Yang, Kyu Yeon Hur, Myung Shik Lee
Gut microbiota play critical physiological roles in energy extraction from the intestine and in the control of systemic immunity, as well as local intestinal immunity. Disturbance of gut microbiota leads to the development of several diseases, such as colitis, inflammatory bowel diseases, metabolic disorders, cancer, etc. From a metabolic point of view, the gut is a large metabolic organ and one of the first to come into contact with dietary fats. Interestingly, excessive dietary fat has been incriminated as a primary culprit of metabolic syndrome and obesity...
November 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29046435/long-acting-mic-1-gdf15-molecules-to-treat-obesity-evidence-from-mice-to-monkeys
#3
Yumei Xiong, Kenneth Walker, Xiaoshan Min, Clarence Hale, Thanhvien Tran, Renee Komorowski, Jerry Yang, Jasmine Davda, Noi Nuanmanee, Dao Kemp, Xiaozhen Wang, Hantao Liu, Silke Miller, Ki Jeong Lee, Zhulun Wang, Murielle M Véniant
In search of metabolically regulated secreted proteins, we conducted a microarray study comparing gene expression in major metabolic tissues of fed and fasted ob/ob mice and C57BL/6 mice. The array used in this study included probes for ~4000 genes annotated as potential secreted proteins. Circulating macrophage inhibitory cytokine 1 (MIC-1)/growth differentiation factor 15 (GDF15) concentrations were increased in obese mice, rats, and humans in comparison to age-matched lean controls. Adeno-associated virus-mediated overexpression of GDF15 and recombinant GDF15 treatments reduced food intake and body weight and improved metabolic profiles in various metabolic disease models in mice, rats, and obese cynomolgus monkeys...
October 18, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29045349/male-specific-association-between-fat-free-mass-index-and-faecal-microbiota-in-2-to-3-year-old-australian-children
#4
Paula Smith-Brown, Mark Morrison, Lutz Krause, Peter S W Davies
OBJECTIVES: Maturation of the gut microbiota has been shown to influence childhood growth while alterations in microbiota composition are proposed to be causally related to the development of overweight and obesity. The objective of this study is to explore the association between microbiota profile, body size and body composition in young children. METHODS: Faecal microbiota was examined by 16S rRNA gene sequencing while body composition was assessed using the deuterium oxide dilution technique in a cohort of 37 well-nourished 2 to 3 year old Australian children...
October 17, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29044772/rd-lawrence-lecture-2017-incretins-the-intelligent-hormones-in-diabetes
#5
V A Gault
The incretin hormones glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) have attracted considerable scientific and clinical interest due largely to their insulin-releasing and glucose-lowering properties. Indeed, GLP-1-based therapies are now key treatment options for many people with diabetes worldwide. In contrast, GIP-based agents have yet to reach the clinic based primarily on the impaired insulinotropic action of GIP observed in people with diabetes. Nevertheless, GIP is a key physiological regulator of insulin secretion and stable forms of GIP show much promise in rodent models to alleviate diabetes-obesity...
October 16, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/29044635/development-and-application-of-a-real-time-polymerase-chain-reaction-assay-for-detection-of-a-novel-gut-bacteriophage-crassphage
#6
Yuying Liang, Xin Jin, Yuan Huang, Shuiping Chen
BACKGROUND: crAssphage is a novel and by far the most abundant bacteriophage in human gut. This bacteriophage might modulate gut microbiota balance so as to be involved in some diseases like obesity, diabetes, metabolic disorders, hypertension, and cancer. Therefore, a rapid and reliable detection and quantification method for crAssphage is essential for studying its molecular epidemiology and pathogenicity in human diseases. MATERIALS AND METHODS: The primers-probes set for the quantitative real-time PCR assay was designed based on the DNA polymerase gene (ORF00018) of crAssphage...
October 16, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/29043006/does-dietary-fat-affect-inflammatory-markers-in-overweight-and-obese-individuals-a-review-of-randomized-controlled-trials-from-2010-to-2016
#7
REVIEW
Vibeke H Telle-Hansen, Jacob J Christensen, Stine M Ulven, Kirsten B Holven
BACKGROUND: Obesity, a major cause of death and disability, is increasing worldwide. Obesity is characterized by a chronic, low-grade inflammatory state which is suggested to play a critical role in the development of obesity-related diseases like cardiovascular diseases and type 2 diabetes. In fact, in the hours following consumption of a meal, a transient increase in inflammatory markers occurs, a response that is exaggerated in obese subjects. Dietary composition, including content of dietary fatty acids, may affect this inflammatory response both acutely and chronically, and thereby be predictive of progression of disease...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/29043005/impact-of-supplementation-with-a-food-derived-microbial-community-on-obesity-associated-inflammation-and-gut-microbiota-composition
#8
Marianna Roselli, Chiara Devirgiliis, Paola Zinno, Barbara Guantario, Alberto Finamore, Rita Rami, Giuditta Perozzi
BACKGROUND: Obesity is a complex pathology associated with dysbiosis, metabolic alterations, and low-grade chronic inflammation promoted by immune cells, infiltrating and populating the adipose tissue. Probiotic supplementation was suggested to be capable of counteracting obesity-associated immune and microbial alterations, based on its proven immunomodulatory activity and positive effect on gut microbial balance. Traditional fermented foods represent a natural source of live microbes, including environmental strains with probiotic features, which could transiently colonise the gut...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/29042449/peptide-yy-mediates-the-satiety-effects-of-diets-enriched-with-whey-protein-fractions-in-male-rats
#9
Rizaldy C Zapata, Arashdeep Singh, Prasanth K Chelikani
Dairy proteins-whey protein, in particular-are satiating and often recommended for weight control; however, little is known about the mechanisms by which whey protein and its components promote satiety and weight loss. We used diet-induced obese rats to determine whether the hypophagic effects of diets that are enriched with whey and its fractions, lactalbumin and lactoferrin, are mediated by the gut hormone, peptide YY (PYY). We demonstrate that high protein diets that contain whey, lactalbumin, and lactoferrin decreased food intake and body weight with a concurrent increase in PYY mRNA abundance in the colon and/or plasma PYY concentrations...
October 17, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29038988/can-the-gastrointestinal-microbiota-be-modulated-by-dietary-fibre-to-treat-obesity
#10
H C Davis
Recent research suggests that the human gastrointestinal microbiota is greatly involved in yielding, storing and expending energy from the diet; therefore, it may be a further factor in linking diet to obesity. The gut microbial composition is affected by diet throughout the human lifespan, and is highly dynamic and efficient in response to dietary alterations in particular to dietary fibre intake. Short-chained fatty acids (SCFA) are the bi-product of fibre fermentation and have both obesogenic and anti-obesogenic properties...
October 16, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29038768/gut-microbial-metabolite-short-chain-fatty-acids-and-obesity
#11
REVIEW
Xuan Li, Yuuki Shimizu, Ikuo Kimura
Over the past decade, the gut microbiota has emerged as an essential mediator in the pathophysiology of obesity and related metabolic disorders. In this context, the reciprocal interactions of the gut microbiota structure and their metabolite profiles with host metabolism predisposing to a range of pathological conditions (e.g., insulin resistance) related to energy homeostasis have been increasingly discussed in various animal models and human cohorts. Remarkably, as the role of gut microbial metabolites as critical signaling molecules that function through the complementary host receptors has come to be appreciated, tremendous attention has been focused on the proposed diet-gut microbiota-host homeostasis axis, entailing extensive cross-disciplinary efforts in medical, pharmaceutical, and agricultural sciences...
2017: Bioscience of Microbiota, Food and Health
https://www.readbyqxmd.com/read/29038387/nephrotoxic-effect-of-aspartame-as-an-artificial-sweetener-a-brief-review
#12
Mohammad Reza Ardalan, Hadi Tabibi, Vahideh Ebrahimzadeh Attari, Aida Malek Mahdavi
Aspartame is one of the most popular artificial sweeteners over the world. Although its consumption is considered to be safe in acceptable daily intake ranges which were set by the United States Food and Drugs Administration and other regulatory agencies, there are lots of controversies regarding its safety nowadays. Some of the recent experimental and epidemiological studies showed that consumption of aspartame may causes some adverse health effects including obesity, metabolic syndrome, and alteration in gut microbiota...
October 2017: Iranian Journal of Kidney Diseases
https://www.readbyqxmd.com/read/29036231/vildagliptin-increases-butyrate-producing-bacteria-in-the-gut-of-diabetic-rats
#13
Qian Zhang, Xinhua Xiao, Ming Li, Miao Yu, Fan Ping, Jia Zheng, Tong Wang, Xiaojing Wang
Emerging evidence supports a key role for the gut microbiota in metabolic diseases, including type 2 diabetes (T2D) and obesity. The dipeptidyl peptidase-4 inhibitor vildagliptin is highly efficacious in treating T2D. However, whether vildagliptin can alter the gut microbiome is still unclear. This study aimed to identify whether vildagliptin modifies the gut microbiota structure during T2D treatment. Diabetic Sprague-Dawley (SD) rats were induced by a high-fat diet and streptozotocin injection (HFD/STZ). Diabetic rats were orally administered a low dose of vildagliptin (LV, 0...
2017: PloS One
https://www.readbyqxmd.com/read/29035308/gut-microbiota-and-nonalcoholic-fatty-liver-disease-insights-on-mechanisms-and-therapy
#14
REVIEW
Junli Ma, Qihang Zhou, Houkai Li
The gut microbiota plays critical roles in development of obese-related metabolic diseases such as nonalcoholic fatty liver disease (NAFLD), type 2 diabetes(T2D), and insulin resistance(IR), highlighting the potential of gut microbiota-targeted therapies in these diseases. There are various ways that gut microbiota can be manipulated, including through use of probiotics, prebiotics, synbiotics, antibiotics, and some active components from herbal medicines. In this review, we review the main roles of gut microbiota in mediating the development of NAFLD, and the advances in gut microbiota-targeted therapies for NAFLD in both the experimental and clinical studies, as well as the conclusions on the prospect of gut microbiota-targeted therapies in the future...
October 16, 2017: Nutrients
https://www.readbyqxmd.com/read/29034327/high-fat-diet-changes-fungal-microbiomes-and-interkingdom-relationships-in-the-murine-gut
#15
Timothy Heisel, Emmanuel Montassier, Abigail Johnson, Gabriel Al-Ghalith, Yi-Wei Lin, Li-Na Wei, Dan Knights, Cheryl A Gale
Dietary fat intake and shifts in gut bacterial community composition are associated with the development of obesity. To date, characterization of microbiota in lean versus obese subjects has been dominated by studies of gut bacteria. Fungi, recently shown to affect gut inflammation, have received little study for their role in obesity. We sought to determine the effects of high-fat diet on fungal and bacterial community structures in a mouse model using the internal transcribed spacer region 2 (ITS2) of fungal ribosomal DNA (rDNA) and the 16S rRNA genes of bacteria...
September 2017: MSphere
https://www.readbyqxmd.com/read/29031728/single-cell-rna-sequencing-reveals-a-distinct-population-of-proglucagon-expressing-cells-specific-to-the-mouse-upper-small-intestine
#16
Leslie L Glass, Fernando J Calero-Nieto, Wajid Jawaid, Pierre Larraufie, Richard G Kay, Berthold Göttgens, Frank Reimann, Fiona M Gribble
OBJECTIVES: To identify sub-populations of intestinal preproglucagon-expressing (PPG) cells producing Glucagon-like Peptide-1, and their associated expression profiles of sensory receptors, thereby enabling the discovery of therapeutic strategies that target these cell populations for the treatment of diabetes and obesity. METHODS: We performed single cell RNA sequencing of PPG-cells purified by flow cytometry from the upper small intestine of 3 GLU-Venus mice. Cells from 2 mice were sequenced at low depth, and from the third mouse at high depth...
October 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29031410/harnessing-gut-microbes-for-mental-health-getting-from-here-to-there
#17
REVIEW
Annadora J Bruce-Keller, J Michael Salbaum, Hans-Rudolf Berthoud
There has been an explosion of interest in the study of microorganisms inhabiting the gastrointestinal tract (gut microbiota) and their impact on host health and physiology. Accumulating data suggest that altered communication between gut microbiota and host systems could participate in disorders such as obesity, diabetes mellitus, and autoimmune disorders as well as neuropsychiatric disorders, including autism, anxiety, and major depressive disorders. The conceptual development of the microbiome-gut-brain axis has facilitated understanding of the complex and bidirectional networks between gastrointestinal microbiota and their host, highlighting potential mechanisms through which this environment influences central nervous system physiology...
August 30, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29030493/intrinsic-aerobic-capacity-governs-the-associations-between-gut-microbiota-composition-and-fat-metabolism-age-dependently-in-rat-siblings
#18
Satu Pekkala, Sanna Lensu, Miriam Nokia, Sanja Vanhatalo, Lauren G Koch, Steven L Britton, Heikki Kainulainen
Host genetic factors affecting the gut microbiome play an important role in obesity. Yet limited attention has been paid on the host genetic factors linked to physical fitness in modifying the microbiome. This study determined whether sibling-matched pairs of rats selectively bred for high (HCR) and low (LCR) aerobic capacity differ in their microbiome age-dependently and which taxa associate with differential in metabolism. Several taxa in young adult rats (hereafter young) linked to inherited aerobic capacity while in older adult (hereafter old) rats most of the differences between the lines associated with body weight...
October 13, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/29028448/characterization-of-the-stool-microbiome-in-hispanic-preschool-children-by-weight-status-and-time
#19
Emily B Hollister, Byron A Foster, Mahmoud Dahdouli, Jesica Ramirez, Zhao Lai
BACKGROUND: Variations in gut microbiota composition and diversity have been associated with childhood adiposity, although most studies describing this have been cross-sectional in nature. Our objective was to evaluate associations between body weight and the gut microbiota over time in obese preschool-age children. METHODS: Obese, preschool-age, Hispanic children provided stool samples at baseline and following a 6-month behavioral intervention. Normal-weight (NW) children also provided stool samples...
October 13, 2017: Childhood Obesity
https://www.readbyqxmd.com/read/29026883/increased-weight-gain-by-c-section-functional-significance-of-the-primordial-microbiome
#20
Keith A Martinez, Joseph C Devlin, Corey R Lacher, Yue Yin, Yi Cai, Jincheng Wang, Maria G Dominguez-Bello
Epidemiological evidence supports a direct association between early microbiota impact-including C-section-and obesity. We performed antibiotic-free, fostered C-sections and determined the impact on the early microbiota and body weight during development. Mice in the C-section group gained more body mass after weaning, with a stronger phenotype in females. C-section-born mice lacked the dynamic developmental gut microbiota changes observed in control mice. The results demonstrate a causal relationship between C-section and increased body weight, supporting the involvement of maternal vaginal bacteria in normal metabolic development...
October 2017: Science Advances
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