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https://www.readbyqxmd.com/read/29154733/metabolomic-analysis-of-alterations-in-lipid-oxidation-carbohydrate-and-amino-acid-metabolism-in-dairy-goats-caused-by-exposure-to-aflotoxin-b1
#1
Jianbo Cheng, Shuai Huang, Caiyun Fan, Nan Zheng, Yangdong Zhang, Songli Li, Jiaqi Wang
The purposes of this study were to investigate the systemic and characteristic metabolites in the serum of dairy goats induced by aflatoxin B1 (AFB1) exposure and to further understand the endogenous metabolic alterations induced by it. A nuclear magnetic resonance (NMR)-based metabonomic approach was used to analyse the metabolic alterations in dairy goats that were induced by low doses of AFB1 (50 µg/kg DM). We found that AFB1 exposure caused significant elevations of glucose, citrate, acetate, acetoacetate, betaine, and glycine yet caused reductions of lactate, ketone bodies (acetate, β-hydroxybutyrate), amino acids (citrulline, leucine/isoleucine, valine, creatine) and cell membrane structures (choline, lipoprotein, N-acetyl glycoproteins) in the serum...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29145814/elevated-exhaled-acetone-concentration-in-stage-c-heart-failure-patients-with-diabetes-mellitus
#2
Tetsuro Yokokawa, Takamasa Sato, Satoshi Suzuki, Masayoshi Oikawa, Akiomi Yoshihisa, Atsushi Kobayashi, Takayoshi Yamaki, Hiroyuki Kunii, Kazuhiko Nakazato, Hitoshi Suzuki, Shu-Ichi Saitoh, Takafumi Ishida, Akito Shimouchi, Yasuchika Takeishi
BACKGROUND: Breath acetone is a noninvasive biomarker of heart failure; however, its significance in heart failure patients with diabetes mellitus has yet to be clarified. The objective of this study is to investigate whether exhaled acetone concentration is a noninvasive biomarker in heart failure patients with diabetes mellitus. METHODS: This study prospectively included 35 diabetic patients with stage C heart failure and 20 diabetic patients with or at risk of heart failure (stage A or B)...
November 16, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29137983/transcriptional-regulation-of-acetoacetyl-coa-synthetase-by-sp1-in-neuroblastoma-cells
#3
Shinya Hasegawa, Masahiko Imai, Masahiro Yamasaki, Noriko Takahashi, Tetsuya Fukui
Acetoacetyl-CoA synthetase (AACS) is the enzyme responsible for cholesterol and fatty acid synthesis in the cytosol. We have previously shown that AACS has an important role in normal neuronal development and that knockdown of SREBP-2, which orchestrates cholesterol synthesis, resulted in the downregulation of AACS mRNA levels. In this study, we investigated the transcriptional mechanism of AACS in Neuro-2a, neuroblastoma cells. Luciferase assay showed that the minimal core promoter of the mouse AACS gene is located in a region with 110 bps upstream from the transcription start site...
November 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29132539/the-diabetic-heart-utilizes-ketone-bodies-as-an-energy-source
#4
Yuji Mizuno, Eisaku Harada, Hitoshi Nakagawa, Yoshinobu Morikawa, Makoto Shono, Fumihito Kugimiya, Michihiro Yoshimura, Hirofumi Yasue
BACKGROUND: Diabetic heart is characterized by failure of insulin to increase glucose uptake and increasingly relies on free fatty acids (FFAs) as a source of fuel in animal models. However, it is not well known how cardiac energy metabolism is altered in diabetic hearts in humans. We examined cardiac fuel metabolism in the diabetics as compared to non-diabetics who underwent cardiac catheterization for heart diseases. MATERIAL AND METHODS: The study subjects comprised 81 patients (male 55, female 26, average age 63...
December 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29119686/ketone-body-3-hydroxybutyrate-mimics-calorie-restriction-via-the-nrf2-activator-fumarate-in-the-retina
#5
Yusuke Izuta, Toshihiro Imada, Ryuji Hisamura, Erina Oonishi, Shigeru Nakamura, Emi Inagaki, Masataka Ito, Tomoyoshi Soga, Kazuo Tsubota
Calorie restriction (CR) being the most robust dietary intervention provides various health benefits. D-3-hydroxybutyrate (3HB), a major physiological ketone, has been proposed as an important endogenous molecule for CR. To investigate the role of 3HB in CR, we investigated potential shared mechanisms underlying increased retinal 3HB induced by CR and exogenously applied 3HB without CR to protect against ischemic retinal degeneration. The repeated elevation of retinal 3HB, with or without CR, suppressed retinal degeneration...
November 9, 2017: Aging Cell
https://www.readbyqxmd.com/read/29114500/analysis-of-energy-restriction-and-physical-activity-on-brain-function-the-role-of-ketone-body-and-brain-derived-neurotrophic-factor
#6
REVIEW
Chan Ho Park, Yi-Sub Kwak
Brain development is a complex process, and stimuli during this development period may modulate the functional maturation of the brain. It has been shown that environmental stimuli, such as physical activity habits, have a beneficial effect on brain development. Endurance exercise and prolonged fasting state are known to improve brain function including cognition. The exact mechanisms of exercise improving brain function are still unknown. However, it can be considered that energy restriction and stressful challenge induced by long-lasting physical exercise might cause direct effect on brain function...
August 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29111889/the-combined-effects-of-exercise-diet-and-a-multi-ingredient-dietary-supplement-on-body-composition-and-adipokine-changes-in-overweight-adults
#7
Shawn M Arent, Alan J Walker, Joseph K Pellegrino, David J Sanders, Bridget A McFadden, Tim N Ziegenfuss, Hector L Lopez
BACKGROUND: Very few weight and fat loss supplements undergo finished-product research to examine efficacy. The purpose of this study was to determine the effects of an 8-week diet and exercise program on body composition, hip and waist girth, and adipokines and evaluate whether a dietary supplement containing raspberry ketone, capsaicin, caffeine, garlic, and Citrus aurantium enhanced outcomes. METHODS: Overweight men and women completed this randomized, placebo-controlled, double-blind study...
November 7, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/29109686/ketone-diester-ingestion-impairs-time-trial-performance-in-professional-cyclists
#8
Jill J Leckey, Megan L Ross, Marc Quod, John A Hawley, Louise M Burke
We investigated the effect of pre- "race" ingestion of a 1,3-butanediol acetoacetate diester on blood ketone concentration, substrate metabolism and performance of a cycling time trial (TT) in professional cyclists. In a randomized cross-over design, 10 elite male cyclists completed a ~31 km laboratory-based TT on a cycling ergometer programmed to simulate the 2017 World Road Cycling Championships course. Cyclists consumed a standardized meal [2 g/kg body mass (BM) carbohydrate (CHO)] the evening prior to a trial day and a CHO breakfast (2 g/kg BM CHO) with 200 mg caffeine on the morning of a trial day...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29108233/mitoketoscins-novel-mitochondrial-inhibitors-for-targeting-ketone-metabolism-in-cancer-stem-cells-cscs
#9
Bela Ozsvari, Federica Sotgia, Katie Simmons, Rachel Trowbridge, Richard Foster, Michael P Lisanti
Previous studies have now well-established that epithelial cancer cells can utilize ketone bodies (3-hydroxybutyrate and aceto-acetate) as mitochondrial fuels, to actively promote tumor growth and metastatic dissemination. The two critical metabolic enzymes implicated in this process are OXCT1 and ACAT1, which are both mitochondrial proteins. Importantly, over-expression of OXCT1 or ACAT1 in human breast cancer cells is sufficient to genetically drive tumorigenesis and/or lung metastasis, validating that they indeed behave as metabolic "tumor promoters"...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29107291/absence-of-the-kinase-s6k1-mimics-the-effect-of-chronic-endurance-exercise-on-glucose-tolerance-and-muscle-oxidative-stress
#10
C Binsch, T Jelenik, A Pfitzer, M Dille, S Müller-Lühlhoff, S Hartwig, S Karpinski, S Lehr, D G Kabra, A Chadt, M Roden, H Al-Hasani, T R Castañeda
OBJECTIVE: Ribosomal protein S6 Kinase-1 (S6K1) has been linked to resistance exercise-mediated improvements in glycemia. We hypothesized that S6K1 may also play a role in regulating glycemic control in response to endurance exercise training. METHODS: S6k1-knockout (S6K1KO) and WT mice on a 60 cal% high-fat diet were trained for 4 weeks on treadmills, metabolically phenotyped, and compared to sedentary controls. RESULTS: WT mice showed improved glucose tolerance after training...
November 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29090929/age-and-sex-effects-on-plasma-metabolite-association-networks-in-healthy-subjects
#11
Alessia Vignoli, Leonardo Tenori, Claudio Luchinat, Edoardo Saccenti
In the era of precision medicine, the analysis of simple information like sex and age can increase the potential to better diagnose and treat conditions that occur more frequently in one of the two sexes, present sex-specific symptoms and outcomes, or are characteristic of a specific age group. We present here study of the association networks constructed from an array of 22 plasma metabolites measured on a cohort of 844 healthy blood donors. Through differential network analysis we show that specific association networks can be associated with sex and age: different connectivity patterns where observed suggesting sex-related variability in several metabolic pathways (branched-chain amino acids, ketone bodies and propanoate metabolism)...
November 1, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29065221/berberine-attenuates-hepatic-steatosis-and-enhances-energy-expenditure-in-mice-by-inducing-autophagy-and-fibroblast-growth-factor-21
#12
Yixuan Sun, Mingfeng Xia, Hongmei Yan, Yamei Han, Feifei Zhang, Zhimin Hu, Aoyuan Cui, Fengguang Ma, Zhengshuai Liu, Qi Gong, Xuqing Chen, Jing Gao, Hua Bian, Yi Tan, Yu Li, Xin Gao
BACKGROUND AND PURPOSE: Berberine, a compound from rhizome coptidis, is traditionally used to treat gastrointestinal infections, such as bacteria diarrhea. Recently, hypoglycemic and hypolipidemic efficacies of berberine were identified. We investigate mechanisms by which berberine regulates hepatic lipid metabolism and energy expenditure in mice. EXPERIMENTAL APPROACH: Liver-specific SIRT1 knockout (SIRT1 LKO) mice and their wild-type littermates were fed on a HFHS diet, and then treated with berberine by intraperitoneal injection for five weeks...
October 24, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29058362/the-ketone-body-metabolite-%C3%AE-hydroxybutyrate-induces-an-antidepression-associated-ramification-of-microglia-via-hdacs-inhibition-triggered-akt-small-rhogtpase-activation
#13
Chao Huang, Peng Wang, Xing Xu, Yaru Zhang, Yu Gong, Wenfeng Hu, Minhui Gao, Yue Wu, Yong Ling, Xi Zhao, Yibin Qin, Rongrong Yang, Wei Zhang
Direct induction of macrophage ramification has been shown to promote an alternative (M2) polarization, suggesting that the ramified morphology may determine the function of immune cells. The ketone body metabolite β-hydroxybutyrate (BHB) elevated in conditions including fasting and low-carbohydrate ketogenic diet (KD) can reduce neuroinflammation. However, how exactly BHB impacts microglia remains unclear. We report that BHB as well as its producing stimuli fasting and KD induced obvious ramifications of murine microglia in basal and inflammatory conditions in a reversible manner, and these ramifications were accompanied with microglial profile toward M2 polarization and phagocytosis...
October 23, 2017: Glia
https://www.readbyqxmd.com/read/29040389/the-anti-epileptic-ketogenic-diet-alters-hippocampal-transporter-levels-and-reduces-adiposity-in-aged-rats
#14
Abbi R Hernandez, Caesar M Hernandez, Keila T Campos, Leah M Truckenbrod, Yasemin Sakarya, Joseph A McQuail Ph D, Christy S Carter, Jennifer L Bizon, Andrew P Maurer, Sara N Burke
Nutritional ketosis is induced by high fat/low carbohydrate dietary regimens, which produce high levels of circulating ketone bodies, shifting metabolism away from glucose utilization. While ketogenic diets (KD) were initially introduced to suppress seizures, they are garnering attention for their potential to treat a myriad of neurodegenerative and metabolic disorders that are associated with advanced age. The feasibility and physiological impact of implementing a long-term KD in old animals, however, has not been systematically examined...
October 12, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29025285/safety-and-efficacy-of-canagliflozin-in-elderly-patients-with-type-2-diabetes-mellitus-a-1-year-post-marketing-surveillance-in-japan
#15
Maki Goda, Tomoko Yamakura, Kazuyo Sasaki, Takumi Tajima, Makoto Ueno
Objective To evaluate the safety and efficacy of canagliflozin in elderly patients with type 2 diabetes mellitus (T2DM) in clinical settings. Methods We conducted a 1-year post-marketing surveillance (PMS) of canagliflozin in almost all the elderly patients (≥65 years old) with T2DM who began taking canagliflozin during the first 3 months after its launch in Japan. The main outcomes included the incidences of adverse drug reactions (ADRs), serious ADRs and the changes of laboratory tests as well as efficacy variables...
October 13, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/29018777/rationale-feasibility-and-acceptability-of-ketogenic-diet-for-cancer-treatment
#16
REVIEW
Hae-Yun Chung, Yoo Kyoung Park
Ketogenic diet has been used for more than 80 years as a successful dietary regimen for epilepsy. Recently, dietary modulation by carbohydrate depletion via ketogenic diet has been suggested as an important therapeutic strategy to selectively kill cancer cells and as adjuvant therapy for cancer treatment. However, some researchers insist ketogenic diet to be highly undesirable as ketogenic diet may trigger and/or exacerbate cachexia development and usually result in significant weight loss. This review revisits the meaning of physiological ketosis in the light of this evidence and considers possibility of the use of ketogenic diet for oncology patients...
September 2017: Journal of Cancer Prevention
https://www.readbyqxmd.com/read/29016751/cardiac-effects-of-sglt2-inhibitors-the-sodium-hypothesis
#17
Edoardo Bertero, Leticia Prates Roma, Pietro Ameri, Christoph Maack
The effects of intense glycaemic control on macrovascular complications in patients with type 2 diabetes are incompletely resolved, and many glucose-lowering medications negatively affect cardiovascular outcomes. Recently, the EMPA-REG OUTCOME trial revealed that empagliflozin, an inhibitor of the sodium-glucose cotransporter 2 (SGLT2), substantially reduced the risk of hospitalization for heart failure, death from cardiovascular causes, and all-cause mortality in patients with type 2 diabetes mellitus at high cardiovascular risk...
August 4, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28990936/olfactory-receptor-544-reduces-adiposity-by-steering-fuel-preference-toward-fats
#18
Chunyan Wu, Su Hyeon Hwang, Yaoyao Jia, Joobong Choi, Yeon-Ji Kim, Dahee Choi, Duleepa Pathiraja, In-Geol Choi, Seung-Hoi Koo, Sung-Joon Lee
Olfactory receptors (ORs) are present in tissues outside the olfactory system; however, the function of these receptors remains relatively unknown. Here, we determined that olfactory receptor 544 (Olfr544) is highly expressed in the liver and adipose tissue of mice and regulates cellular energy metabolism and obesity. Azelaic acid (AzA), an Olfr544 ligand, specifically induced PKA-dependent lipolysis in adipocytes and promoted fatty acid oxidation (FAO) and ketogenesis in liver, thus shifting the fuel preference to fats...
October 9, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28987936/hmg-coa-synthase-2-drives-brain-metabolic-reprogramming-in-cocaine-exposure
#19
Xue Shao, Yunxuan Tang, Hailei Long, Hui Gu, Jie Zhang, Pengchi Deng, Yinglan Zhao, Xiaobo Cen
The brain is a high energy-consuming organ that typically utilizes glucose as the main energy source for cerebral activity. When glucose becomes scarce under conditions of stress, ketone bodies, such as β-hydroxybutyrate, acetoacetate and acetone, become extremely important. Alterations in brain energy metabolism have been observed in psychostimulant abusers; however, the mode of brain metabolic programming in cocaine dependence remains largely unknown. Here, we profiled the metabolites and metabolic enzymes from brain nucleus accumbens (NAc) of mice exposed to cocaine...
October 4, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28987011/the-distant-double-bond-determines-the-fate-of-the-carboxylic-group-in-the-dissociative-photoionization-of-oleic-acid
#20
Maarten F Heringa, Jay Gates Slowik, Maximilian Goldmann, Ruth Signorell, Patrick Hemberger, Andras Bodi
The valence threshold photoionization of oleic acid has been studied using synchrotron VUV radiation and imaging photoelectron photoion coincidence (iPEPICO) spectroscopy. An oleic acid aerosol beam was impacted on a copper thermodesorber, heated to 130 °C, to evaporate the particles quantitatively. Upon threshold photoionization, oleic acid produces the intact parent ion first, followed by dehydration at higher energies. Starting at ca. 10 eV, a large number of fragment ions slowly rise suggesting several fragmentation coordinates with quasi-degenerate activation energies...
October 7, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
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