keyword
MENU ▼
Read by QxMD icon Read
search

BCAA metabolism

keyword
https://www.readbyqxmd.com/read/28219950/nutritional-modulation-of-mouse-and-human-liver-bud-growth-through-a-branched-amino-acid-metabolism
#1
Hiroyuki Koike, Ran-Ran Zhang, Yasuharu Ueno, Keisuke Sekine, Yun-Wen Zheng, Takanori Takebe, Hideki Taniguchi
Liver bud progenitors experience a transient amplification during early organ growth phase, yet the responsible mechanism was not fully understood. Collective evidence highlighted the specific requirements in stem cell metabolism for expanding organ progenitors during organogenesis and regeneration. Here, transcriptome analyses showed progenitors of mouse and human liver bud growth stage specifically expressed branched chain aminotransferase1 gene, a known breakdown enzyme of branched-chain amino acid (BCAA) for energy generation...
February 20, 2017: Development
https://www.readbyqxmd.com/read/28178567/defective-branched-chain-amino-acid-catabolism-disrupts-glucose-metabolism-and-sensitizes-the-heart-to-ischemia-reperfusion-injury
#2
Tao Li, Zhen Zhang, Stephen C Kolwicz, Lauren Abell, Nathan D Roe, Maengjo Kim, Bo Zhou, Yang Cao, Julia Ritterhoff, Haiwei Gu, Daniel Raftery, Haipeng Sun, Rong Tian
Elevated levels of branched-chain amino acids (BCAAs) have recently been implicated in the development of cardiovascular and metabolic diseases, but the molecular mechanisms are unknown. In a mouse model of impaired BCAA catabolism (knockout [KO]), we found that chronic accumulation of BCAAs suppressed glucose metabolism and sensitized the heart to ischemic injury. High levels of BCAAs selectively disrupted mitochondrial pyruvate utilization through inhibition of pyruvate dehydrogenase complex (PDH) activity...
February 7, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28145418/chronic-dietary-exposure-to-branched-chain-amino-acids-impairs-glucose-disposal-in-vegans-but-not-in-omnivores
#3
J Gojda, L Rossmeislová, R Straková, J Tůmová, M Elkalaf, M Jaček, P Tůma, J Potočková, E Krauzová, P Waldauf, J Trnka, V Štich, M Anděl
BACKGROUND/OBJECTIVES: Branched chain amino acids (BCAA) are among nutrients strongly linked with insulin sensitivity (IS) measures. We investigated the effects of a chronic increase of BCAA intake on IS in two groups of healthy subjects differing in their basal consumption of BCAA, that is, vegans and omnivores. SUBJECTS/METHODS: Eight vegans and eight matched omnivores (five men and three women in each group) received 15 g (women) or 20 g (men) of BCAA daily for 3 months...
February 1, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28130304/ccpa-and-cody-coordinate-acetate-metabolism-in-streptococcus-mutans
#4
Jeong Nam Kim, Robert A Burne
: In the dental caries pathogen Streptococcus mutans, phosphotransacetylase (Pta) and acetate kinase (Ack) convert pyruvate into acetate with the concomitant generation of ATP. The genes for this pathway are tightly regulated by multiple environmental and intracellular inputs, but the basis for differential expression of the genes for Pta and Ack in S. mutans had not been investigated. Here, we show that inactivation in S. mutans of ccpA or codY reduced the activity of the ackA promoter, whereas a ccpA mutant displayed elevated pta promoter activity...
January 27, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28127425/novel-metabolic-and-physiological-functions-of-branched-chain-amino-acids-a-review
#5
REVIEW
Shihai Zhang, Xiangfang Zeng, Man Ren, Xiangbing Mao, Shiyan Qiao
It is widely known that branched chain amino acids (BCAA) are not only elementary components for building muscle tissue but also participate in increasing protein synthesis in animals and humans. BCAA (isoleucine, leucine and valine) regulate many key signaling pathways, the most classic of which is the activation of the mTOR signaling pathway. This signaling pathway connects many diverse physiological and metabolic roles. Recent years have witnessed many striking developments in determining the novel functions of BCAA including: (1) Insufficient or excessive levels of BCAA in the diet enhances lipolysis...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28051178/muscle-specific-deletion-of-bdk-amplifies-loss-of-myofibrillar-protein-during-protein-undernutrition
#6
Takuya Ishikawa, Yasuyuki Kitaura, Yoshihiro Kadota, Yukako Morishita, Miki Ota, Fumiya Yamanaka, Minjun Xu, Masahito Ikawa, Naokazu Inoue, Fuminori Kawano, Naoya Nakai, Taro Murakami, Shinji Miura, Yukino Hatazawa, Yasutomi Kamei, Yoshiharu Shimomura
Branched-chain amino acids (BCAAs) are essential amino acids for mammals and play key roles in the regulation of protein metabolism. However, the effect of BCAA deficiency on protein metabolism in skeletal muscle in vivo remains unclear. Here we generated mice with lower BCAA concentrations by specifically accelerating BCAA catabolism in skeletal muscle and heart (BDK-mKO mice). The mice appeared to be healthy without any obvious defects when fed a protein-rich diet; however, bolus ingestion of BCAAs showed that mTORC1 sensitivity in skeletal muscle was enhanced in BDK-mKO mice compared to the corresponding control mice...
January 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28032919/expression-of-the-human-isoform-of-glutamate-dehydrogenase-hgdh2-augments-tca-cycle-capacity-and-oxidative-metabolism-of-glutamate-during-glucose-deprivation-in-astrocytes
#7
Jakob D Nissen, Kasper Lykke, Jaroslaw Bryk, Malin H Stridh, Ioannis Zaganas, Dorte M Skytt, Arne Schousboe, Lasse K Bak, Wolfgang Enard, Svante Pääbo, Helle S Waagepetersen
A key enzyme in brain glutamate homeostasis is glutamate dehydrogenase (GDH) which links carbohydrate and amino acid metabolism mediating glutamate degradation to CO2 and expanding tricarboxylic acid (TCA) cycle capacity with intermediates, i.e. anaplerosis. Humans express two GDH isoforms, GDH1 and 2, whereas most other mammals express only GDH1. hGDH1 is widely expressed in human brain while hGDH2 is confined to astrocytes. The two isoforms display different enzymatic properties and the nature of these supports that hGDH2 expression in astrocytes potentially increases glutamate oxidation and supports the TCA cycle during energy-demanding processes such as high intensity glutamatergic signaling...
December 29, 2016: Glia
https://www.readbyqxmd.com/read/27995574/metabolite-variation-in-lean-and-obese-streptozotocin-stz-induced-diabetic-rats-via-1-h-nmr-based-metabolomics-approach
#8
Azliana Abu Bakar Sajak, Ahmed Mediani, Maulidiani, Amin Ismail, Faridah Abas
Diabetes mellitus (DM) is considered as a complex metabolic disease because it affects the metabolism of glucose and other metabolites. Although many diabetes studies have been conducted in animal models throughout the years, the pathogenesis of this disease, especially between lean diabetes (ND + STZ) and obese diabetes (OB + STZ), is still not fully understood. In this study, the urine from ND + STZ, OB + STZ, lean/control (ND), and OB + STZ rats were collected and compared by using (1)H NMR metabolomics...
December 19, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27987392/urinary-metabolic-profiling-of-cisplatin-nephrotoxicity-and-nephroprotective-effects-of-orthosiphon-stamineus-leaves-elucidated-by-1-h-nmr-spectroscopy
#9
Raghunath Pariyani, Intan Safinar Ismail, Amalina Azam, Alfi Khatib, Faridah Abas, Khozirah Shaari, Hazilawati Hamza
Orthosiphon stamineus (OS) is a popular medicinal herb used in traditional Chinese medicine as a diuretic agent and for renal system disorders. This study employed (1)H NMR based metabolomics approach to investigate the possible protective activity of OS in cisplatin induced nephrotoxicity owing to its diuretic and antioxidant activities. Aqueous (OSAE) and 50% aqueous ethanolic (OSFE) extracts of OS leaves were orally administered at 400mg/kg BW doses to rats which were then intraperitoneally injected with cisplatin at 5mg/kg BW dose...
December 8, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27960294/free-amino-acid-profile-and-expression-of-genes-implicated-in-protein-metabolism-in-skeletal-muscle-of-growing-pigs-fed-low-protein-diets-supplemented-with-branched-chain-amino-acids
#10
Yehui Duan, Qiuping Guo, Chaoyue Wen, Wenlong Wang, Yinghui Li, Bie Tan, Fengna Li, Yulong Yin
Revealing the expression patterns of genes involved in protein metabolism as affected by diets would be useful for further clarifying the importance of the balance among the branched-chain amino acids (BCAAs), which include leucine (Leu), isoleucine (Ile), and valine (Val). Therefore, we used growing pigs to explore the effects of different dietary BCAA ratios on muscle protein metabolism. The Leu:Ile:Val ratio was 1:0.51:0.63 (20% crude protein, CP), 1:1:1 (17% CP), 1:0.75:0.75 (17% CP), 1:0.51:0.63 (17% CP), and 1:0...
December 14, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27933294/branched-chain-amino-acid-levels-are-related-with-surrogates-of-disturbed-lipid-metabolism-among-older-men
#11
Urho M Kujala, Markku Peltonen, Merja K Laine, Jaakko Kaprio, Olli J Heinonen, Jouko Sundvall, Johan G Eriksson, Antti Jula, Seppo Sarna, Heikki Kainulainen
AIMS/HYPOTHESIS: Existing studies suggest that decreased branched-chain amino acid (BCAA) catabolism and thus elevated levels in blood are associated with metabolic disturbances. Based on such information, we have developed a hypothesis how BCAA degradation mechanistically connects to tricarboxylic acid cycle, intramyocellular lipid storage, and oxidation, thus allowing more efficient mitochondrial energy production from lipids as well as providing better metabolic health. We analyzed whether data from aged Finnish men are in line with our mechanistic hypothesis linking BCAA catabolism and metabolic disturbances...
2016: Frontiers in Medicine
https://www.readbyqxmd.com/read/27898682/genetic-predisposition-to-an-impaired-metabolism-of-the-branched-chain-amino-acids-and-risk-of-type-2-diabetes-a-mendelian-randomisation-analysis
#12
Luca A Lotta, Robert A Scott, Stephen J Sharp, Stephen Burgess, Jian'an Luan, Therese Tillin, Amand F Schmidt, Fumiaki Imamura, Isobel D Stewart, John R B Perry, Luke Marney, Albert Koulman, Edward D Karoly, Nita G Forouhi, Rasmus J O Sjögren, Erik Näslund, Juleen R Zierath, Anna Krook, David B Savage, Julian L Griffin, Nishi Chaturvedi, Aroon D Hingorani, Kay-Tee Khaw, Inês Barroso, Mark I McCarthy, Stephen O'Rahilly, Nicholas J Wareham, Claudia Langenberg
BACKGROUND: Higher circulating levels of the branched-chain amino acids (BCAAs; i.e., isoleucine, leucine, and valine) are strongly associated with higher type 2 diabetes risk, but it is not known whether this association is causal. We undertook large-scale human genetic analyses to address this question. METHODS AND FINDINGS: Genome-wide studies of BCAA levels in 16,596 individuals revealed five genomic regions associated at genome-wide levels of significance (p < 5 × 10-8)...
November 2016: PLoS Medicine
https://www.readbyqxmd.com/read/27891833/metabolomics-guided-insights-on-bariatric-surgery-versus-behavioral-interventions-for-weight-loss
#13
REVIEW
Sara Tulipani, Jules Griffin, Magali Palau-Rodriguez, Ximena Mora-Cubillos, Rosa M Bernal-Lopez, Francisco J Tinahones, Barbara E Corkey, Cristina Andres-Lacueva
OBJECTIVE: To review the metabolomic studies carried out so far to identify metabolic markers associated with surgical and dietary treatments for weight loss in subjects with obesity. METHODS: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed. RESULTS: Thirty-two studies successfully met the eligibility criteria. The metabolic adaptations shared by surgical and dietary interventions mirrored a state of starvation ketoacidosis (increase of circulating ketone bodies), an increase of acylcarnitines and fatty acid β-oxidation, a decrease of specific amino acids including branched-chain amino acids (BCAA) and (lyso)glycerophospholipids previously associated with obesity, and adipose tissue expansion...
December 2016: Obesity
https://www.readbyqxmd.com/read/27886623/liver-bcatm-transgenic-mouse-model-reveals-the-important-role-of-the-liver-in-maintaining-bcaa-homeostasis
#14
Elitsa A Ananieva, Cynthia G Van Horn, Meghan R Jones, Susan M Hutson
Unlike other amino acids, the branched-chain amino acids (BCAAs) largely bypass first-pass liver degradation due to a lack of hepatocyte expression of the mitochondrial branched-chain aminotransferase (BCATm). This sets up interorgan shuttling of BCAAs and liver-skeletal muscle cooperation in BCAA catabolism. To explore whether complete liver catabolism of BCAAs may impact BCAA shuttling in peripheral tissues, the BCATm gene was stably introduced into mouse liver. Two transgenic mouse lines with low and high hepatocyte expression of the BCATm transgene (LivTg-LE and LivTg-HE) were created and used to measure liver and plasma amino acid concentrations and determine whether the first two BCAA enzymatic steps in liver, skeletal muscle, heart and kidney were impacted...
February 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/27885628/bcaa-metabolism-and-nh3-homeostasis
#15
M E Conway, S M Hutson
The branched chain amino acids (BCAA) are essential amino acids required not only for growth and development, but also as nutrient signals and as nitrogen donors to neurotransmitter synthesis and glutamate/glutamine cycling. Transamination and oxidative decarboxylation of the BCAAs are catalysed by the branched-chain aminotransferase proteins (BCATm, mitochondrial and BCATc, cytosolic) and the branched-chain α-keto acid dehydrogenase enzyme complex (BCKDC), respectively. These proteins show tissue, cell compartmentation, and protein-protein interactions, which call for substrate shuttling or channelling and nitrogen transfer for oxidation to occur...
2016: Advances in Neurobiology
https://www.readbyqxmd.com/read/27872968/new-functions-and-potential-applications-of-amino-acids
#16
Hisayuki Uneyama, Hisamine Kobayashi, Naoto Tonouchi
Currently, several types of amino acids are being produced and used worldwide. Nevertheless, several new functions of amino acids have been recently discovered that could result in other applications. For example, oral stimulation by glutamate triggers the cephalic phase response to prepare for food digestion. Further, the stomach and intestines have specific glutamate-recognizing systems in their epithelial mucosa. Regarding clinical applications, addition of monosodium glutamate to the medicinal diet has been shown to markedly enhance gastric secretion in a vagus-dependent manner...
November 22, 2016: Advances in Biochemical Engineering/biotechnology
https://www.readbyqxmd.com/read/27872960/branched-chain-amino-acids
#17
Keisuke Yamamoto, Atsunari Tsuchisaka, Hideaki Yukawa
Branched-chain amino acids (BCAAs), viz., L-isoleucine, L-leucine, and L-valine, are essential amino acids that cannot be synthesized in higher organisms and are important nutrition for humans as well as livestock. They are also valued as synthetic intermediates for pharmaceuticals. Therefore, the demand for BCAAs in the feed and pharmaceutical industries is increasing continuously. Traditional industrial fermentative production of BCAAs was performed using microorganisms isolated by random mutagenesis. A collection of these classical strains was also scientifically useful to clarify the details of the BCAA biosynthetic pathways, which are tightly regulated by feedback inhibition and transcriptional attenuation...
November 22, 2016: Advances in Biochemical Engineering/biotechnology
https://www.readbyqxmd.com/read/27816452/deletion-of-the-transcriptional-coactivator-pgc1%C3%AE-in-skeletal-muscles-is-associated-with-reduced-expression-of-genes-related-to-oxidative-muscle-function
#18
Yukino Hatazawa, Kimiko Minami, Ryoji Yoshimura, Takumi Onishi, Mark Christian Manio, Kazuo Inoue, Naoki Sawada, Osamu Suzuki, Shinji Miura, Yasutomi Kamei
The expression of the transcriptional coactivator PGC1α is increased in skeletal muscles during exercise. Previously, we showed that increased PGC1α leads to prolonged exercise performance (the duration for which running can be continued) and, at the same time, increases the expression of branched-chain amino acid (BCAA) metabolism-related enzymes and genes that are involved in supplying substrates for the TCA cycle. We recently created mice with PGC1α knockout specifically in the skeletal muscles (PGC1α KO mice), which show decreased mitochondrial content...
December 9, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27770143/-1-h-nuclear-magnetic-resonance-nmr-based-serum-metabolomics-of-human-gallbladder-inflammation
#19
Raj Kumar Sharma, Kumudesh Mishra, Alvina Farooqui, Anu Behari, Vinay Kumar Kapoor, Neeraj Sinha
OBJECTIVE AND DESIGN: We present in this article (1)H nuclear magnetic resonance (NMR)-based metabolic approach to screen the serum metabolic alterations in human gallbladder inflammation with chronic cholecystitis (CC). MATERIAL/METHODS: Total of 71 human serum samples was divided into two groups, (n = 41, CC) and (n = 30 control). (1)H NMR metabolic profiling was carried out for investigation of metabolic alterations. Multivariate statistical analysis was applied for pattern recognition and identification of metabolites playing crucial role in gallbladder inflammation...
January 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/27765690/isocaloric-diets-high-in-animal-or-plant-protein-reduce-liver-fat-and-inflammation-in-individuals-with-type-2-diabetes
#20
Mariya Markova, Olga Pivovarova, Silke Hornemann, Stephanie Sucher, Turid Frahnow, Katrin Wegner, Jürgen Machann, Klaus Jürgen Petzke, Johannes Hierholzer, Ralf Lichtinghagen, Christian Herder, Maren Carstensen-Kirberg, Michael Roden, Natalia Rudovich, Susanne Klaus, Ralph Thomann, Rosemarie Schneeweiss, Sascha Rohn, Andreas F H Pfeiffer
BACKGROUND & AIMS: Nonalcoholic fatty liver disease (NAFLD) is associated with increased risk of hepatic, cardiovascular, and metabolic diseases. High-protein diets, rich in methionine and branched chain amino acids (BCAAs), apparently reduce liver fat, but can induce insulin resistance. We investigated the effects of diets high in animal protein (AP) vs plant protein (PP), which differ in levels of methionine and BCAAs, in patients with type 2 diabetes and NAFLD. We examined levels of liver fat, lipogenic indices, markers of inflammation, serum levels of fibroblast growth factor 21 (FGF21), and activation of signaling pathways in adipose tissue...
February 2017: Gastroenterology
keyword
keyword
51224
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"