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Obesity intestine inflammation

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https://www.readbyqxmd.com/read/28698546/obesity-induces-organ-and-tissue-specific-tight-junction-restructuring-and-barrier-deregulation-by-claudin-switching
#1
Rizwan Ahmad, Bilal Rah, Dhundy Bastola, Punita Dhawan, Amar B Singh
Obesity increases susceptibility to multiple organ disorders, however, underlying mechanisms remain unclear. The subclinical inflammation assisted by obesity-induced gut permeability may underlie obesity-associated co-morbidities. Despite eminent clinical significance of the obesity led gut barrier abnormalities, its precise molecular regulation remains unclear. It is also unknown whether barrier deregulations, similar to the gut, characterize other vital organs in obese individuals. The claudin family of proteins is integral to the tight junction (TJ), the apical cell-cell adhesion and a key regulator of the epithelial barrier...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28696379/obesity-and-asthma-a-missing-link
#2
REVIEW
Mª Amelia Gomez-Llorente, Raquel Romero, Natalia Chueca, Ana Martinez-Cañavate, Carolina Gomez-Llorente
Obesity and asthma are two chronic conditions that affect millions of people. Genetic and lifestyle factors such as diet, physical activity, and early exposure to micro-organisms are important factors that may contribute to the escalating prevalence of both conditions. The prevalence of asthma is higher in obese individuals. Recently, two major phenotypes of asthma with obesity have been described: one phenotype of early-onset asthma that is aggravated by obesity, and a second phenotype of later-onset asthma that predominantly affects women...
July 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28685024/bugs-guts-and-brains-and-the-regulation-of-food-intake-and-body-weight
#3
REVIEW
M K Hamilton, H E Raybould
The microbiota-gut-brain axis is currently being explored in many types of rodent models, including models of behavioral, neurodegenerative and metabolic disorders. Our laboratory is interested in determining the mechanisms and consequences of activation of vagal afferent neurons that lead to activation of parasympathetic reflexes and changes in feeding behavior in the context of obesity. Obesity is associated with microbial dysbiosis, decreased intestinal barrier function, gut inflammation, metabolic endotoxemia, chronic low-grade systemic inflammation and desensitization of vagal afferent nerves...
December 2016: International Journal of Obesity Supplements
https://www.readbyqxmd.com/read/28682223/-gut-microbiota-and-immune-crosstalk-in-metabolic-disease
#4
Rémy Burcelin
The aim of the review is to discuss about the role played by the defence crosstalk between the gut microbiota and the intestinal immune system, in the development of metabolic disease focusing on obesity and diabetes. Starting from physiological and pathological stand points and based on the latest published data, this review is addressing how the concept of the hologenome theory of evolution can drive the fate of metabolic disease. The notion of "metabolic infection" to explain the "metabolic inflammation" is discussed...
2017: Biologie Aujourd'hui
https://www.readbyqxmd.com/read/28680065/nopal-opuntia-ficus-indica-protects-from-metabolic-endotoxemia-by-modifying-gut-microbiota-in-obese-rats-fed-high-fat-sucrose-diet
#5
Mónica Sánchez-Tapia, Miriam Aguilar-López, Claudia Pérez-Cruz, Edgar Pichardo-Ontiveros, Mei Wang, Sharon M Donovan, Armando R Tovar, Nimbe Torres
Current efforts are directed to reducing the gut dysbiosis and inflammation produced by obesity. The purpose of this study was to investigate whether consuming nopal, a vegetable rich in dietary fibre, vitamin C, and polyphenols can reduce the metabolic consequences of obesity by modifying the gut microbiota and preventing metabolic endotoxemia in rats fed a high fat and sucrose diet. With this aim, rats were fed a high fat diet with 5% sucrose in the drinking water (HFS) for 7 months and then were fed for 1 month with HFS + 5% nopal (HFS + N)...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28675945/impact-of-dietary-fat-on-gut-microbiota-and-low-grade-systemic-inflammation-mechanisms-and-clinical-implications-on-obesity
#6
Flávia Galvão Cândido, Flávia Xavier Valente, Łukasz Marcin Grześkowiak, Ana Paula Boroni Moreira, Daniela Mayumi Usuda Prado Rocha, Rita de Cássia Gonçalves Alfenas
Dietary fat strongly affects human health by modulating gut microbiota composition and low-grade systemic inflammation. High-fat diets have been implicated in reduced gut microbiota richness, increased Firmicutes to Bacteroidetes ratio, and several changes at family, genus and species levels. Saturated (SFA), monounsaturated (MUFA), polyunsaturated (PUFA) and conjugated linolenic fatty acids share important pathways of immune system activation/inhibition with gut microbes, modulating obesogenic and proinflammatory profiles...
July 4, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28649593/colonic-microbiota-encroachment-correlates-with-dysglycemia-in-humans
#7
Benoit Chassaing, Shreya M Raja, James D Lewis, Shanthi Srinivasan, Andrew T Gewirtz
BACKGROUND AND AIMS: Mucoid structures that coat the epithelium play an essential role in keeping the intestinal microbiota at a safe distance from host cells. Encroachment of bacteria into the normally almost-sterile inner mucus layer has been observed in inflammatory bowel disease and in mouse models of colitis. Moreover, such microbiota encroachment has also been observed in mouse models of metabolic syndrome, which are associated low-grade intestinal inflammation. Hence, we investigated if microbiota encroachment might correlate with indices of metabolic syndrome in humans...
September 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28630461/antrodia-cinnamomea-reduces-obesity-and-modulates-the-gut-microbiota-in-high-fat-diet-fed-mice
#8
C-J Chang, C-C Lu, C-S Lin, J Martel, Y-F Ko, D M Ojcius, T-R Wu, Y-H Tsai, T-S Yeh, J-J Lu, H-C Lai, J D Young
BACKGROUND: Obesity is associated with gut microbiota dysbiosis, disrupted intestinal barrier and chronic inflammation. Given the high and increasing prevalence of obesity worldwide, anti-obesity treatments that are safe, effective and widely available would be beneficial. We examined whether the medicinal mushroom Antrodia cinnamomea may reduce obesity in mice fed with a high-fat diet (HFD). METHODS: Male C57BL/6J mice were fed a HFD for eight weeks to induce obesity and chronic inflammation...
June 20, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28625150/update-on-the-molecular-mechanisms-underlying-the-effect-of-cholecystokinin-and-cholecystokinin-1-receptor-on-the-formation-of-cholesterol-gallstones
#9
Helen H Wang, Piero Portincasa, David Q-H Wang
Cholecystokinin (CCK) is an important neuro-intestinal peptide hormone produced by the enteroendocrine I-cells in the upper part of small intestine. Protein- and fat-enriched food plays an important role in triggering CCK secretion from the intestine. Carbohydrates stimulate only small amounts of CCK release. The CCK-1 receptor (CCK-1R) is largely localized in the gallbladder, sphincter of Oddi, pancreas, small intestine, gastric mucosa, and pyloric sphincter, where it is responsible for CCK to regulate multiple digestive processes including gallbladder contraction, pancreatic secretion, small intestinal transit, and gastric emptying...
June 19, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28615382/factors-influencing-the-gut-microbiota-inflammation-and-type-2-diabetes
#10
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...
July 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28612853/mangos-and-their-bioactive-components-adding-variety-to-the-fruit-plate-for-health
#11
REVIEW
Britt M Burton-Freeman, Amandeep K Sandhu, Indika Edirisinghe
The diet is an essential factor affecting the risk for development and progression of modern day chronic diseases, particularly those with pathophysiological roots in inflammation and oxidative stress-induced damage. The potential impact of certain foods and their bioactive compounds to reverse or prevent destructive dysregulated processes leading to disease has attracted intense research attention. The mango (Mangifera indica Linn.) is a tropical fruit with distinctive nutritional and phytochemical composition...
June 14, 2017: Food & Function
https://www.readbyqxmd.com/read/28596023/prebiotic-reduces-body-fat-and-alters-intestinal-microbiota-in-children-with-overweight-or-obesity
#12
Alissa C Nicolucci, Megan P Hume, Inés Martínez, Shyamchand Mayengbam, Jens Walter, Raylene A Reimer
BACKGROUND & AIMS: It might be possible to manipulate the intestinal microbiota with prebiotics or other agents to prevent or treat obesity. However, little is known about the ability of prebiotics to specifically modify gut microbiota in children with overweight/obesity or reduce body weight. We performed a randomized controlled trial to study the effects of prebiotics on body composition, markers of inflammation, bile acids in fecal samples, and composition of the intestinal microbiota in children with overweight or obesity...
June 3, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28590260/ghrelin-and-autophagy
#13
Silvia Ezquerro, Gema Frühbeck, Amaia Rodríguez
PURPOSE OF REVIEW: A compromised autophagy is associated with the onset of obesity, type 2 diabetes, nonalcoholic fatty liver disease, cardiovascular and neurodegenerative diseases. Our aim is to review the potential role of ghrelin, a gut hormone involved in energy homeostasis, in the regulation of autophagy. RECENT FINDINGS: In the recent years, it has been demonstrated that autophagy constitutes an important mechanism by which ghrelin exerts a plethora of central and peripheral actions...
June 3, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/28580850/-advances-in-the-pathogenesis-of-non-alcoholic-fatty-liver-disease
#14
Alajos Pár, Gabriella Pár
Non alcoholic fatty liver disease is the hepatic manifestation of metabolic syndrome, and the most common liver disease. Its more aggressive form is the non alcoholic steatohepatitis. Multiple genetic and environmental factors lead to the accumulation of triglicerides and the inflammatory cascade. High fat diet, obesity, adipocyte dysfunction with cytokine production, insulin resistance and increased lipolysis with free fatty acid flux into the liver - all are the drivers of liver cell injury. Activation of inflammasome by damage- or pathogen-associated molecular patterns results in "steril inflammation" and immune response, while the hepatic stellate cells and progenitor cells lead to fibrogenesis...
June 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28571979/impact-of-high-fat-diet-on-the-intestinal-microbiota-and-small-intestinal-physiology-before-and-after-the-onset-of-obesity
#15
REVIEW
João Ricardo Araújo, Julie Tomas, Christiane Brenner, Philippe J Sansonetti
The modulation of the intestinal microbiota by high-fat diet (HFD) has a major impact on both immunological and metabolic functions of the host. Taking this into consideration, the aim of this contribution is to review the impact of HFD on microbiota profile and small intestinal physiology before and after the onset of obesity and its metabolic complications. Evidence from animal studies suggest that before the onset of obesity and its metabolic complications, HFD induces intestinal dysbiosis - encompassing changes in composition balance and massive redistribution with bacteria occupying intervillous spaces and crypts - associated with early physiopathological changes, predominantly in the ileum, such as low-grade inflammation, decreased antimicrobial peptides expression, impaired mucus production, secretion and layer's thickness, and decreased expression of tight junction proteins...
May 29, 2017: Biochimie
https://www.readbyqxmd.com/read/28560232/the-microbiome-in-visceral-medicine-inflammatory-bowel-disease-obesity-and-beyond
#16
REVIEW
Mircea T Chiriac, Mousumi Mahapatro, Markus F Neurath, Christoph Becker
It has become increasingly evident over the past two decades that the microbiota plays a nurturing role in the development of the immune system. This appears to be important since the amplitude of immune responses has a crucial regulatory function in homeostasis and the prevention of unwanted inflammation. Hence, a malfunctioning gut flora has been shown to play a key role in visceral medicine. Strong evidence demonstrates for example that intestinal inflammation can develop as a result of a dysregulated microbiota, deficient antimicrobial responses, and aberrant bacterial translocation into the bowel wall...
May 2017: Visceral Medicine
https://www.readbyqxmd.com/read/28555008/different-intestinal-microbial-profile-in-over-weight-and-obese-subjects-consuming-a-diet-with-low-content-of-fiber-and-antioxidants
#17
Tania Fernández-Navarro, Nuria Salazar, Isabel Gutiérrez-Díaz, Clara G de Los Reyes-Gavilán, Miguel Gueimonde, Sonia González
Obesity has been related to an increased risk of multiple diseases in which oxidative stress and inflammation play a role. Gut microbiota has emerged as a mediator in this interaction, providing new mechanistic insights at the interface between fat metabolism dysregulation and obesity development. Our aim was to analyze the interrelationship among obesity, diet, oxidative stress, inflammation and the intestinal microbiota in 68 healthy adults (29.4% normal-weight). Diet was assessed through a food frequency questionnaire and converted into nutrients and dietary compounds using food composition tables...
May 27, 2017: Nutrients
https://www.readbyqxmd.com/read/28522975/hypoxia-and-inactivity-related-physiological-changes-constipation-inflammation-are-not-reflected-at-the-level-of-gut-metabolites-and-butyrate-producing-microbial-community-the-planhab-study
#18
Robert Šket, Nicole Treichel, Tadej Debevec, Ola Eiken, Igor Mekjavic, Michael Schloter, Marius Vital, Jenna Chandler, James M Tiedje, Boštjan Murovec, Zala Prevoršek, Blaž Stres
We explored the assembly of intestinal microbiota in healthy male participants during the run-in (5 day) and experimental phases [21-day normoxic bed rest (NBR), hypoxic bedrest (HBR)], and hypoxic ambulation (HAmb) in a strictly controlled laboratory environment, balanced fluid, and dietary intakes, controlled circadian rhythm, microbial ambiental burden, and 24/7 medical surveillance. The fraction of inspired O2 (FiO2) and partial pressure of inspired O2 (PiO2) were 0.209 and 133.1 ± 0.3 mmHg for NBR and 0...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28512356/adamdec1-ednrb-and-ptgs1-cox1-inflammation-genes-upregulated-in-the-intestinal-mucosa-of-obese-rats-are-downregulated-by-three-probiotic-strains
#19
Julio Plaza-Díaz, Cándido Robles-Sánchez, Francisco Abadía-Molina, Virginia Morón-Calvente, María José Sáez-Lara, Alfonso Ruiz-Bravo, María Jiménez-Valera, Ángel Gil, Carolina Gómez-Llorente, Luis Fontana
We have previously reported that administration of Lactobacillus paracasei CNCM I-4034, Bifidobacterium breve CNCM I-4035 and Lactobacillus rhamnosus CNCM I-4036 to obese Zucker-Lepr (fa/fa) rats attenuates liver steatosis and exerts anti-inflammatory effects. The goal of the present work was to investigate the modulation of gene expression in intestinal mucosa samples of obese Zucker-Lepr (fa/fa) rats fed the probiotic strains using a DNA microarray and postgenomic techniques. We also measured secretory IgA content in the gut and lipopolysaccharide (LPS)-binding protein (LBP) in serum...
May 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28512322/physicochemical-properties-of-dietary-phytochemicals-can-predict-their-passive-absorption-in-the-human-small-intestine
#20
Sophie N B Selby-Pham, Rosalind B Miller, Kate Howell, Frank Dunshea, Louise E Bennett
A diet high in phytochemical-rich plant foods is associated with reducing the risk of chronic diseases such as cardiovascular and neurodegenerative diseases, obesity, diabetes and cancer. Oxidative stress and inflammation (OSI) is the common component underlying these chronic diseases. Whilst the positive health effects of phytochemicals and their metabolites have been demonstrated to regulate OSI, the timing and absorption for best effect is not well understood. We developed a model to predict the time to achieve maximal plasma concentration (Tmax) of phytochemicals in fruits and vegetables...
May 16, 2017: Scientific Reports
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