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Amino acid supplementation

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https://www.readbyqxmd.com/read/28220590/biosynthesis-and-mass-spectral-fragmentation-pathways-of-13-c-and-15-n-labeled-cytochalasin-d-produced-by-xylaria-arbuscula
#1
Luciana da Silva Amaral, Taicia Pacheco Fill, Luiz Fernando Arruda Santos, Edson Rodrigues-Filho
The fungus Xylaria arbuscula was isolated as an endophyte from Cupressus lusitanica and has shown to be a prominent producer of cytochalasans, mainly cytochalasin C, D and Q. Cytochalasans comprise an important class of fungal secondary metabolites that have aroused attention due to their uncommon molecular structures and pronounced biological activities. Due to the few published studies on the ESI-MS/MS fragmentation of this important class of secondary metabolites, in the first part of our work we studied the cytochalasin D fragmentation pathways using an ESI-Q-ToF mass spectrometer coupled with liquid chromatography...
February 21, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28220550/metabolomic-profiling-in-umbilical-venous-plasma-reveals-effects-of-dietary-rumen-protected-arginine-or-n-carbamylglutamate-supplementation-in-nutrient-restricted-hu-sheep-during-pregnancy
#2
L Sun, H Zhang, Y Fan, Y Guo, G Zhang, H Nie, F Wang
Maternal nutrient restriction during pregnancy is a major problem worldwide for human and animal production. Arginine (Arg) is critical to health, growth and reproduction. N-carbamylglutamate (NCG), a key enzyme in arginine synthesis, is not extensively degraded in rumen. The aim of this study was to investigate ameliorating effects of rumen-protected arginine (RP-Arg) and NCG supplementation on dietary in undernourished Hu sheep during gestation. From day 35 to 110 of gestation, 32 Hu ewes carrying twin foetuses were randomly divided into four groups: a control (CG) group (n = 8; fed 100% National Research Council (NRC) requirements for pregnant sheep), a nutrient-restricted (RG) group (n = 8; fed 50% NRC requirements, which included 50% mineral-vitamin mixture) and two treatment (Arg and NCG) groups (n = 8; fed 50% NRC requirements supplemented with 20 g/day RP-Arg or 5 g/day NCG, which included 50% mineral-vitamin mixture)...
February 20, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28219990/an-outbreak-of-pellagra-in-the-kasese-catchment-area-dowa-malawi
#3
George Matapandeu, Samuel H Dunn, Patti Pagels
Pellagra is a deficiency of niacin or its amino acid precursor, tryptophan, which presents with the classic four Ds: the characteristic dermatitis, diarrhea, dementia, and eventually death if left untreated. The incidence of pellagra is quite rare presently because of increased awareness and strategies such as vitamin fortification. However, the deficiency is still present in cultures that rely on maize as their primary source of sustenance. We report a recent outbreak in a catchment area in Kasese, Malawi, of 691 cases of pellagra which were successfully treated with niacin supplementation...
February 20, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28219950/nutritional-modulation-of-mouse-and-human-liver-bud-growth-through-a-branched-amino-acid-metabolism
#4
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/28216953/therapeutic-potential-of-alpha-ketoglutarate-against-acetaminophen-induced-hepatotoxicity-in-rats
#5
Lalita Mehra, Yasha Hasija, Gaurav Mittal
OBJECTIVE: Alpha-ketoglutarate (α-KG) is a cellular intermediary metabolite of Krebs cycle, involved in energy metabolism, amino acid synthesis, and nitrogen transport. It is available over-the-counter and marketed as a nutritional supplement. There is a growing body of evidence to suggest that dietary α-KG has the potential to maintain cellular redox status and thus can protect various oxidative stress induced disease states. The aim of the present study was to investigate the hepatoprotective role of α-KG in acetaminophen (APAP) induced toxicity in rats...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/28215327/enzymes-in-fermented-fish
#6
Giyatmi, H E Irianto
Fermented fish products are very popular particularly in Southeast Asian countries. These products have unique characteristics, especially in terms of aroma, flavor, and texture developing during fermentation process. Proteolytic enzymes have a main role in hydrolyzing protein into simpler compounds. Fermentation process of fish relies both on naturally occurring enzymes (in the muscle or the intestinal tract) as well as bacteria. Fermented fish products processed using the whole fish show a different characteristic compared to those prepared from headed and gutted fish...
2017: Advances in Food and Nutrition Research
https://www.readbyqxmd.com/read/28215168/contributions-of-the-interaction-between-dietary-protein-and-gut-microbiota-to-intestinal-health
#7
Ning Ma, Yanan Tian, Yi Wu, Xi Ma
There is growing recognition that composition and metabolic activity of the gut microbiota can be modulated by the dietary proteins which in turn impact health. The amino acid composition and digestibility of proteins, which are influenced by its source and amount of intake, play a pivotal role in determining the microbiota. Reciprocally, it appears that the gut microbiota is also able to affect protein metabolism which give rise to the view that function between the microbiota and protein can proceed in both directions...
February 16, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28212548/branched-chain-amino-acids-prevent-hepatic-fibrosis-and-development-of-hepatocellular-carcinoma-in-a-non-alcoholic-steatohepatitis-mouse-model
#8
Kai Takegoshi, Masao Honda, Hikari Okada, Riuta Takabatake, Naoto Matsuzawa-Nagata, Jean S Campbell, Masashi Nishikawa, Tetsuro Shimakami, Takayoshi Shirasaki, Yoshio Sakai, Taro Yamashita, Toshinari Takamura, Takuji Tanaka, Shuichi Kaneko
Oral supplementation with branched-chain amino acids (BCAA; leucine, isoleucine, and valine) in patients with liver cirrhosis potentially suppresses the incidence of hepatocellular carcinoma (HCC) and improves event-free survival. However, the detailed mechanisms of BCAA action have not been fully elucidated. BCAA were administered to atherogenic and high-fat (Ath+HF) diet-induced nonalcoholic steatohepatitis (NASH) model mice. Liver histology, tumor incidence, and gene expression profiles were evaluated. Ath+HF diet mice developed hepatic tumors at a high frequency at 68 weeks...
February 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28208022/protein-requirements-for-critically-ill-patients-with-renal-and-liver-failure
#9
Jayshil J Patel, Craig J McClain, Menaka Sarav, Jill Hamilton-Reeves, Ryan T Hurt
Diseases leading to critical illness induce proteolysis resulting in muscle wasting and negative nitrogen balance. Muscle wasting has been associated with poor intensive care unit (ICU)-related outcomes, including an increased risk for mortality. Acute kidney injury (AKI) represents a common organ dysfunction associated with ICU-related disorders, such as sepsis, trauma, and respiratory failure. AKI and renal replacement therapy lead to amino acid loss. Decompensated liver cirrhosis (DLC) and acute liver failure (ALF) represent more severe forms of liver dysfunction leading to ICU admission...
February 1, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28197413/mechanism-of-reduced-susceptibility-to-fosfomycin-in-escherichia-coli-clinical-isolates
#10
Yasuo Ohkoshi, Toyotaka Sato, Yuuki Suzuki, Soh Yamamoto, Tsukasa Shiraishi, Noriko Ogasawara, Shin-Ichi Yokota
In recent years, multidrug resistance of Escherichia coli has become a serious problem. However, resistance to fosfomycin (FOM) has been low. We screened E. coli clinical isolates with reduced susceptibility to FOM and characterized molecular mechanisms of resistance and reduced susceptibility of these strains. Ten strains showing reduced FOM susceptibility (MIC ≥ 8 μg/mL) in 211 clinical isolates were found and examined. Acquisition of genes encoding FOM-modifying enzyme genes (fos genes) and mutations in murA that underlie high resistance to FOM were not observed...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28194093/effects-of-an-amylopectin-and-chromium-complex-on-the-anabolic-response-to-a-suboptimal-dose-of-whey-protein
#11
T N Ziegenfuss, H L Lopez, A Kedia, S M Habowski, J E Sandrock, B Raub, C M Kerksick, A A Ferrando
BACKGROUND: Previous research has demonstrated the permissive effect of insulin on muscle protein kinetics, and the enhanced insulin sensitizing effect of chromium. In the presence of adequate whole protein and/or essential amino acids (EAA), insulin has a stimulatory effect on muscle protein synthesis, whereas in conditions of lower blood EAA concentrations, insulin has an inhibitory effect on protein breakdown. In this study, we determined the effect of an amylopectin/chromium (ACr) complex on changes in plasma concentrations of EAA, insulin, glucose, and the fractional rate of muscle protein synthesis (FSR)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28191503/differences-in-gut-metabolites-and-microbial-composition-and-functions-between-egyptian-and-u-s-children-are-consistent-with-their-diets
#12
V Shankar, M Gouda, J Moncivaiz, A Gordon, N V Reo, L Hussein, O Paliy
Previous studies indicated that populations consuming a Mediterranean diet rich in fiber, vegetables, and fruits have a significantly lower risk of cardiovascular and metabolic diseases than populations of industrialized societies consuming diets enriched in processed carbohydrates, animal proteins, and fats. To explore the potential contributions of gut microbiota to the observed diet-related metabolic effects, we conducted an integrative analysis of distal gut microbiota composition and functions and intestinal metabolites in Egyptian and U...
January 2017: MSystems
https://www.readbyqxmd.com/read/28188256/mgdg-pg-and-sqdg-regulate-the-activity-of-light-dependent-protochlorophyllide-oxidoreductase
#13
Michal Gabruk, Beata Myśliwa-Kurdziel, Jerzy Kruk
Light-dependent protochlorophyllide oxidoreductase (POR) is a plant enzyme involved in the chlorophyll biosynthesis pathway. POR reduces one of the double bonds of the protochlorophyllide (Pchlide) using NADPH and light. In the present paper, we found out that PG and SQDG are allosteric regulators of the nucleotide binding, which increase the affinity towards NADPH a hundred fold. Moreover, we showed for the first time that NADH can, like NADPH, form active complexes with Pchlide and POR, however at much higher concentrations...
February 10, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28184235/phosphatidic-acid-biosynthesis-pharmacokinetics-mechanisms-of-action-and-effect-on-strength-and-body-composition-in-resistance-trained-individuals
#14
REVIEW
Peter Bond
The mechanistic target of rapamycin complex 1 (mTORC1) has received much attention in the field of exercise physiology as a master regulator of skeletal muscle hypertrophy. The multiprotein complex is regulated by various signals such as growth factors, energy status, amino acids and mechanical stimuli. Importantly, the glycerophospholipid phosphatidic acid (PA) appears to play an important role in mTORC1 activation by mechanical stimulation. PA has been shown to modulate mTOR activity by direct binding to its FKBP12-rapamycin binding domain...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28183674/albumin-coatings-by-alternating-current-electrophoretic-deposition-for-improving-corrosion-resistance-and-bioactivity-of-titanium-implants
#15
Sarah Höhn, Annabel Braem, Bram Neirinck, Sannakaisa Virtanen
Although Ti alloys are generally regarded to be highly corrosion resistant, inflammatory conditions following surgery can instigate breakdown of the TiO2 passivation layer leading to an increased metal ion release. Furthermore proteins present in the surrounding tissue will readily adsorb on a titanium surface after implantation. In this paper alternating current electrophoretic deposition (AC-EPD) of bovine serum albumin (BSA) on Ti6Al4V was investigated in order to increase the corrosion resistance and control the protein adsorption capability of the implant surface...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28183305/controlling-of-growth-performance-lipid-deposits-and-fatty-acid-composition-of-chicken-meat-through-a-probiotic-lactobacillus-johnsonii-during-subclinical-clostridium-perfringens-infection
#16
Hesong Wang, Xueqin Ni, Lei Liu, Dong Zeng, Jing Lai, Xiaodan Qing, Guangyao Li, Kangcheng Pan, Bo Jing
BACKGROUND: Meat is considered as a major source of polyunsaturated fatty acid (PUFA) which is essential for humans, therefore its lipid level and fatty acid composition have drawn great attention. As no clinical sign can be found in chicks subclinically infected by Clostridium perfringens (CP), the meat may be purchased and eaten. The objective of the present study was to determine whether Lactobacillus johnsonii (LJ) can control the CP-caused impact on growth, lipid levels, fatty acid composition and other flavor or nutritional quality in the meat...
February 10, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28183170/physico-chemical-properties-of-late-incubation-egg-amniotic-fluid-and-a-potential-in-ovo-feed-supplement
#17
Apeh A Omede, Momenuzzaman M Bhuiyan, Fakrul A Islam, Paul A Iji
This study explored the physico-chemical properties of late-incubation egg amniotic fluid and a potential in ovo feed (IOF) supplement. Amniotic fluid was collected from broiler breeders (Ross 308, 51 weeks and Cobb 500, 35 weeks) on day 17 after incubation. A mixture of high-quality soy protein supplement - Hamlet Protein AviStart (HPA) was serially diluted in MilliQ water to obtain solutions ranging from 150 to 9.375 mg/ml. The mixtures were heat-treated (0, 30, 60 minutes) in a waterbath (80 oC) and then centrifuged to obtain supernatants...
January 26, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28179487/supplemental-citrulline-is-more-efficient-than-arginine-in-increasing-systemic-arginine-availability-in-mice
#18
Umang Agarwal, Inka C Didelija, Yang Yuan, Xiaoying Wang, Juan C Marini
Background: Arginine is considered to be an essential amino acid in various (patho)physiologic conditions of high demand. However, dietary arginine supplementation suffers from various drawbacks, including extensive first-pass extraction. Citrulline supplementation may be a better alternative than arginine, because its only fate in vivo is conversion into arginine.Objective: The goal of the present research was to determine the relative efficiency of arginine and citrulline supplementation to improve arginine availability...
February 8, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28179229/exogenous-amino-acids-suppress-glucose-oxidation-and-potentiate-hepatic-glucose-production-in-late-gestation-fetal-sheep
#19
Laura D Brown, Jaden R Kohn, Paul J Rozance, William W Hay, Stephanie R Wesolowski
Acute amino acid (AA) infusion increases AA oxidation rates in normal late gestation fetal sheep. Because fetal oxygen consumption rate does not change with increased AA oxidation, we hypothesized that AA infusion would suppress glucose oxidation pathways and that the additional carbon supply from AA would activate hepatic glucose production. To test this, late gestation fetal sheep were infused intravenously for 3h with saline or exogenous AA (AA). Glucose tracer metabolic studies were performed and skeletal muscle and liver tissues samples were collected...
February 8, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28178201/rett-syndrome-a-focus-on-gut-microbiota
#20
Elisa Borghi, Francesca Borgo, Marco Severgnini, Miriam Nella Savini, Maria Cristina Casiraghi, Aglaia Vignoli
Rett syndrome (RTT) is an X-linked neurodevelopmental disorder affecting 1 in 10,000 live female births. Changes in microbiota composition, as observed in other neurological disorders such as autism spectrum disorders, may account for several symptoms typically associated with RTT. We studied the relationship between disease phenotypes and microbiome by analyzing diet, gut microbiota, and short-chain fatty acid (SCFA) production. We enrolled eight RTT patients and 10 age- and sex-matched healthy women, all without dietary restrictions...
February 7, 2017: International Journal of Molecular Sciences
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