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Short chained fatty acids

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https://www.readbyqxmd.com/read/28088411/standardization-of-milk-infrared-spectra-for-the-retroactive-application-of-calibration-models
#1
V Bonfatti, A Fleming, A Koeck, F Miglior
The objective of this study was to standardize the infrared spectra obtained over time and across 2 milk laboratories of Canada to create a uniform historical database and allow (1) the retroactive application of calibration models for prediction of fine milk composition; and (2) the direct use of spectral information for the development of indicators of animal health and efficiency. Spectral variation across laboratories and over time was inspected by principal components analysis (PCA). Shifts in the PCA scores were detected over time, leading to the definition of different subsets of spectra having homogeneous infrared signal...
January 11, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28087336/oleate-induces-katp-channel-dependent-hyperpolarisation-in-mouse-hypothalamic-glucose-excited-neurones-without-altering-cellular-energy-charge
#2
Selma Dadak, Craig Beall, Julia M Vlachaki Walker, Marc Pm Soutar, Rory J McCrimmon, Michael L J Ashford
The unsaturated fatty acid, oleate exhibits anorexigenic properties reducing food intake and hepatic glucose output. However, its mechanism of action in the hypothalamus has not been fully determined. This study investigated the effects of oleate and glucose on GT1-7 mouse hypothalamic cells (a model of glucose-excited (GE) neurones) and mouse arcuate nucleus (ARC) neurones. Whole-cell and perforated patch-clamp recordings, immunoblotting and cell energy status measures were used to investigate oleate and glucose sensing properties of mouse hypothalamic neurones...
January 9, 2017: Neuroscience
https://www.readbyqxmd.com/read/28075383/soluble-fibre-meal-challenge-reduces-airway-inflammation-and-expression-of-gpr43-and-gpr41-in-asthma
#3
Isabel Halnes, Katherine J Baines, Bronwyn S Berthon, Lesley K MacDonald-Wicks, Peter G Gibson, Lisa G Wood
Short chain fatty acids (SCFAs) are produced following the fermentation of soluble fibre by gut bacteria. In animal models, both dietary fibre and SCFAs have demonstrated anti-inflammatory effects via the activation of free fatty acid receptors, such as G protein-coupled receptor 41 and 43 (GPR41 and GPR43). This pilot study examined the acute effect of a single dose of soluble fibre on airway inflammation-including changes in gene expression of free fatty acid receptors-in asthma. Adults with stable asthma consumed a soluble fibre meal (n = 17) containing 3...
January 10, 2017: Nutrients
https://www.readbyqxmd.com/read/28070968/bacterial-short-chain-fatty-acid-metabolites-modulate-the-inflammatory-response-against-infectious-bacteria
#4
R O Corrêa, A Vieira, E M Sernaglia, M Lancellotti, A T Vieira, M J Avila-Campos, H G Rodrigues, M A R Vinolo
Short chain fatty acids (SCFAs), predominately acetic, propionic and butyric acids, are bacterial metabolites with an important role in the maintenance of homeostasis due to their metabolic and immunomodulatory actions. Some evidence suggests that they may also be relevant during infections. Therefore, we aimed to investigate the effects of SCFAs in the effector functions of neutrophils to an opportunistic pathogenic bacteria, Aggregatibacter actinomycetemcomitans (A. actinomycetemcomitans). Using a subcutaneous model to generate a mono, isolated infection of A...
January 9, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28067588/health-benefits-of-fiber-fermentation
#5
Wendy J Dahl, Nicole C Agro, Åsa M Eliasson, Kaley L Mialki, Joseph D Olivera, Carley T Rusch, Carly N Young
Although fiber is well recognized for its effect on laxation, increasing evidence supports the role of fiber in the prevention and treatment of chronic disease. The aim of this review is to provide an overview of the health benefits of fiber and its fermentation, and describe how the products of fermentation may influence disease risk and treatment. Higher fiber intakes are associated with decreased risk of cardiovascular disease, type 2 diabetes, and some forms of cancer. Fiber may also have a role in lowering blood pressure and in preventing obesity by limiting weight gain...
January 9, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28065757/fats-for-thoughts-an-update-on-brain-fatty-acid-metabolism
#6
Adele Romano, Justyna Barbara Koczwara, Cristina Anna Gallelli, Daniele Vergara, Maria Vittoria Micioni Di Bonaventura, Silvana Gaetani, Anna Maria Giudetti
Brain fatty acid (FA) metabolism deserves a close attention not only for its energetic aspects but also because FAs and their metabolites/derivatives are able to influence many neural functions, contributing to brain pathologies or representing potential targets for pharmacological and/or nutritional interventions. Glucose is the preferred energy substrate for the brain, whereas the role of FAs is more marginal. In conditions of decreased glucose supply ketone bodies, mainly formed by FA oxidation, are the alternative main energy source...
January 5, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28063208/effect-of-supplementation-of-calf-starter-with-fennel-powder-on-performance-weaning-age-and-fermentation-characteristics-in-holstein-dairy-calves
#7
S Saeedi, O Dayani, R Tahmasbi, A Khezri
The objective of this experiment was to investigate the effects on performance, weaning age and rumen fermentation characteristics in Holstein calves when fennel powder was added to their starter diets. Thirty Holstein calves with a mean birth weight 40 kg (SD = 0.5) were allocated randomly to one of the following experimental diets: (i) control (starter diet without fennel powder), (ii) starter diet containing 0.4% of fennel powder and (iii) starter diet containing 0.8% of fennel powder (DM basis). The effect of treatments on mean dry matter intake was significant (p < 0...
February 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28062699/cathelicidin-wa-improves-intestinal-epithelial-barrier-function-and-enhances-host-defense-against-enterohemorrhagic-escherichia-coli-o157-h7-infection
#8
Hongbo Yi, Wangyang Hu, Shan Chen, Zeqing Lu, Yizhen Wang
Impaired epithelial barrier function disrupts immune homeostasis and increases inflammation in intestines, leading to many intestinal diseases. Cathelicidin peptides suppress intestinal inflammation and improve intestinal epithelial barrier function independently of their antimicrobial activity. In this study, we investigated the effects of Cathelicidin-WA (CWA) on intestinal epithelial barrier function, as well as the underlying mechanism, by using enterohemorrhagic Escherichia coli (EHEC)-infected mice and intestinal epithelial cells...
January 6, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28062009/reduced-particle-size-wheat-bran-is-butyrogenic-and-lowers-salmonella-colonization-when-added-to-poultry-feed
#9
K Vermeulen, J Verspreet, C M Courtin, F Haesebrouck, R Ducatelle, F Van Immerseel
Feed additives, including prebiotics, are commonly used alternatives to antimicrobial growth promoters to improve gut health and performance in broilers. Wheat bran is a highly concentrated source of (in)soluble fiber which is partly degraded by the gut microbiota. The aim of the present study was to investigate the potential of wheat bran as such to reduce colonization of the cecum and shedding of Salmonella bacteria in vivo. Also, the effect of particle size was evaluated. Bran with an average reduced particle size of 280μm decreased levels of cecal Salmonella colonization and shedding shortly after infection when compared to control groups and groups receiving bran with larger particle sizes...
January 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28055958/maternal-butyrate-supplementation-induces-insulin-resistance-associated-with-enhanced-intramuscular-fat-deposition-in-the-offspring
#10
Yanping Huang, Shixing Gao, Jinglong Chen, Elke Albrecht, Ruqian Zhao, Xiaojing Yang
Maternal nutrition is important for the risk of the offspring to develop insulin resistance and adiposity later in life. The study was undertaken to determine effects of maternal butyrate supplementation on lipid metabolism and insulin sensitivity in the offspring skeletal muscle. The offspring of rats, fed a control diet or a butyrate diet (1% sodium butyrate) throughout gestation and lactation, was studied at weaning and at 60 days of age. The offspring of dams fed a butyrate diet had higher HOMA-insulin resistance and impaired glucose tolerance...
December 30, 2016: Oncotarget
https://www.readbyqxmd.com/read/28054209/long-term-outcome-of-expanded-newborn-screening-at-boston-children-s-hospital-benefits-and-challenges-in-defining-true-disease
#11
Yuval E Landau, Susan E Waisbren, Lawrence M A Chan, Harvey L Levy
INTRODUCTION: There is no universal consensus of the disorders included in newborn screening programs. Few studies so far, mostly short-term, have compared the outcome of disorders detected by expanded newborn screening (ENBS) to the outcome of the same disorders detected clinically. METHODS: We compared the clinical and neurodevelopmental outcomes in patients with metabolic disorders detected by ENBS, including biotinidase testing, with those detected clinically and followed at the Metabolism Clinic at Boston Children's Hospital...
January 4, 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28049222/short-chain-fatty-acids-inhibit-oxidative-stress-and-inflammation-in-mesangial-cells-induced-by-high-glucose-and-lipopolysaccharide
#12
Wei Huang, Heng-Li Guo, Xian Deng, Ting-Ting Zhu, Jian-Feng Xiong, You-Hua Xu, Yong Xu
Recently, an connection between Short-chain fatty acids (SCFAs) produced by intestinal microbiota and kidney has been revealed. The aim of this study was to explore whether SCFAs or their specific G protein-coupled receptors 43 (GPR43) agonist inhibit oxidative stress and inflammatory response in glomerular mesangial cells (GMCs) induced by high glucose and lipopolysaccharide (LPS). Our research showed that treatment with SCFAs, especially acetate and butyrate, or GPR43 agonist significantly inhibited GMCs proliferation induced by high glucose and LPS, and then reversed the production of reactive oxygen species (ROS) and malondialdehyde (MDA) but increased levels of antioxidant enzyme superoxide dismutase (SOD)...
January 3, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28045429/impact-of-glycosidic-bond-configuration-on-short-chain-fatty-acid-production-from-model-fermentable-carbohydrates-by-the-human-gut-microbiota
#13
Hannah C Harris, Christine A Edwards, Douglas J Morrison
Short chain fatty acids (SCFA) are the major products of carbohydrate fermentation by gut bacteria. Different carbohydrates are associated with characteristic SCFA profiles although the mechanisms are unclear. The individual SCFA profile may determine any resultant health benefits. Understanding determinants of individual SCFA production would enable substrate choice to be tailored for colonic SCFA manipulation. To test the hypothesis that the orientation and position of the glycosidic bond is a determinant of SCFA production profile, a miniaturized in vitro human colonic batch fermentation model was used to study a range of isomeric glucose disaccharides...
January 1, 2017: Nutrients
https://www.readbyqxmd.com/read/28044227/a-novel-versatile-family-iv-carboxylesterase-exhibits-high-stability-and-activity-in-a-broad-ph-spectrum
#14
Amélie Dukunde, Dominik Schneider, Mingji Lu, Silja Brady, Rolf Daniel
OBJECTIVES: To investigate the properties of a novel metagenome-derived member of the hormone-sensitive lipase family of lipolytic enzymes. RESULTS: A forest soil metagenome-derived gene encoding an esterase (Est06) belonging to the hormone-sensitive lipase family of lipolytic enzymes was subcloned, heterologously expressed and characterized. Est06 is a polypeptide of 295 amino acids with a molecular mass of 31 kDa. The deduced protein sequence shares 61% similarity with a hypothetical protein from the marine symbiont Candidatus Entotheonella sp...
January 2, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28040493/characterization-of-a-novel-sgnh-type-esterase-from-lactobacillus-plantarum
#15
Yonggyu Kim, Bum Han Ryu, Jimin Kim, Wanki Yoo, Deu Rae An, Boo-Young Kim, Sena Kwon, Sojeong Lee, Ying Wang, Kyeong Kyu Kim, T Doohun Kim
Lactic acid bacteria (LAB) are sources of a large variety of microbial ester hydrolases because they can produce a wide range of short-chain esters, phenolic alcohols, and fatty acids. Here, a novel SGNH-type esterase (LpSGNH1) from Lactobacillus plantarum WCFS1 was identified, functionally characterized, and immobilized for biotechnological applications. Homologs of LpSGNH1 are also found in many lactic acid bacteria (LAB) species. Biochemical features of LpSGNH1 were investigated using mass spectrometry, gel filtration chromatography, enzyme kinetics, fluorescence, and circular dichroism (CD) spectroscopy...
December 28, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28039811/a-fully-validated-gc-tof-ms-method-for-the-quantification-of-fatty-acids-revealed-alterations-in-the-metabolic-profile-of-fatty-acids-after-smoking-cessation
#16
Michael Goettel, Reinhard Niessner, Nikola Pluym, Gerhard Scherer, Max Scherer
We developed and validated an efficient and robust method for the simultaneous quantification of 44 fatty acid species in human plasma via GC-TOF-MS. The method is characterized by its robustness, accuracy and precision covering a wide range of fatty acid species with various saturation degrees including short chain fatty acids (beginning with FA 4:0) and long chain fatty acids (up to FA 32:0). The fatty acids were methylated prior to analyses and subsequently detected as fatty acid methyl esters by means of GC-TOF-MS...
January 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28035736/targeted-metabolomics-reveals-differences-in-the-extended-postprandial-plasma-metabolome-of-healthy-subjects-after-intake-of-whole-grain-rye-porridges-versus-refined-wheat-bread
#17
Lin Shi, Carl Brunius, Magnus Lindelöf, Souad Abou Shameh, Huaxing Wu, Isabella Lee, Rikard Landberg, Ali A Moazzami
SCOPE: We previously found that whole-grain (WG) rye porridges suppressed appetite and improved glucose metabolism. The present work aimed to investigate potential plasma metabolites that may be related to differences in those appetite and glucose responses. METHODS AND RESULTS: Twenty-one health subjects consumed six isocaloric breakfasts in a randomised cross-over study. Plain WG rye porridges (40 g and 55 g), rye porridge enriched with different inulin: gluten proportions (9:3 g; 6:6 g; 3:9 g), and a 55 g refined wheat bread (control) were served as part of complete breakfast, followed by a standardized lunch...
December 30, 2016: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28035535/the-role-of-the-gastrointestinal-microbiota-in-visceral-pain
#18
Kieran Rea, Siobhain M O'Mahony, Timothy G Dinan, John F Cryan
A growing body of preclinical and clinical evidence supports a relationship between the complexity and diversity of the microorganisms that inhabit our gut (human gastrointestinal microbiota) and health status. Under normal homeostatic conditions this microbial population helps maintain intestinal peristalsis, mucosal integrity, pH balance, immune priming and protection against invading pathogens. Furthermore, these microbes can influence centrally regulated emotional behaviour through mechanisms including microbially derived bioactive molecules (amino acid metabolites, short-chain fatty acids, neuropeptides and neurotransmitters), mucosal immune and enteroendocrine cell activation, as well as vagal nerve stimulation...
December 30, 2016: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28028466/consumption-of-antimicrobial-manuka-honey-does-not-significantly-perturb-the-microbiota-in-the-hind-gut-of-mice
#19
Doug Rosendale, Christine A Butts, Cloe Erika de Guzman, Ian S Maddox, Sheridan Martell, Lynn McIntyre, Margot A Skinner, Hannah Dinnan, Juliet Ansell
The aim of this study was to test the hypothesis that consuming manuka honey, which contains antimicrobial methylglyoxal, may affect the gut microbiota. We undertook a mouse feeding study to investigate whether dietary manuka honey supplementation altered microbial numbers and their production of organic acid products from carbohydrate fermentation, which are markers of gut microbiota function. The caecum of C57BL/6 mice fed a diet supplemented with antimicrobial UMF® 20+ manuka honey at 2.2 g/kg animal did not show any significantly changed concentrations of microbial short chain fatty acids as measured by gas chromatography, except for increased formate and lowered succinate organic acid concentrations, compared to mice fed a control diet...
2016: PeerJ
https://www.readbyqxmd.com/read/28026141/in-vitro-fermentative-capacity-of-swine-large-intestine-comparison-between-native-lantang-and-commercial-duroc-breeds
#20
Peng Hui Cheng, Juan Boo Liang, Yin Bao Wu, Yan Wang, Vincenzo Tufarelli, Vito Laudadio, Xin Di Liao
Native Lantang and commercial Duroc pigs were used as animal models to evaluate the differences existing in dietary fiber utilization ability between breeds. Animals were fed the same diet from weaning (4 weeks) to 4 months of age. Neutral detergent fiber (NDF) from wheat bran (as substrate) and fecal samples from the two breeds (as inoculum) were used in an in vitro gas production trial. Results showed that cumulative and maximum gas productions were higher in inocula from Lantang than those from the Duroc breed (P < 0...
December 27, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
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