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Haowen Jiang, Fuyun Bian, Huihui Zhou, Xuan Wang, Kaidi Wang, Kangsen Mai, Gen He
The low methionine content in plant-based diets is a major limiting factor for feed utilization by animals. However, the molecular consequences triggered by methionine deficiency have not been well characterized, especially in fish species, whose metabolism is unique in many aspects and important for aquaculture industry. In the present study, the primary muscle cells of turbot (Scophthalmus maximus L.) were isolated and treated with or without methionine for 12 h in culture. The responses of nutrient sensing pathways, the proteomic profiling of metabolic processes, and the expressions of key metabolic molecules were systematically examined...
September 14, 2017: Journal of Nutritional Biochemistry
Mª Luisa Ojeda Murillo, Fatima Nogales Bueno, Mª Luisa Murillo Taravillo, Olimpia Carreras Sánchez
Several disorders in children, called Fetal Alcohol Spectrum Disorders (FASD), occur as result of alcohol consumption during pregnancy and lactation. They appear, at least in part, to be related to the oxidative stress that this drug generates. Ethanol metabolism generates reactive oxygen species and causes a depletion of the antioxidant molecule glutathione (GSH) leading to oxidative stress and lipid and protein damage which are related to growth retardation and neurotoxicity, increasing the incidence of FASD...
October 17, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
Xiaoyu Duan, Ye Lin, He Lv, Yang Yang, Hongtao Jiao, Xiaoming Hou
Methionine is the limiting amino acid for milk protein synthesis in dairy cows. The effect of methionine availability on milk protein synthesis is dependent on its active transport into cells through amino acid transporters. L-type amino acid transporter 1 (LAT1), which induces the transport of neutral amino acids, is highly expressed in lactating mammary gland. However, the effect of methionine on LAT1 expression and the mechanism governing this process in dairy cow mammary gland are poorly understood. In this study, we show that treatment of dairy cow mammary epithelial cells with increasing concentrations of methionine for 24 h resulted in increased expression of LAT1 and its associated protein 4F2 heavy chain (4F2hc)...
October 17, 2017: DNA and Cell Biology
Jennifer G Myles, Irini Manoli, Charles P Venditti
PURPOSE OF REVIEW: The current review highlights the varied effects of medical foods high in leucine (Leu) and devoid of valine (Val) and isoleucine (Ile) in the management of methylmalonic acidemia (MMA) and propionic acidemia and cobalamin C (cblC) deficiency, aiming to advance dietary practices. RECENT FINDINGS: Leu is a key metabolic regulator with a multitude of effects on different organ systems. Recent observational studies have demonstrated that these effects can have unintended consequences in patients with MMA as a result of liberal use of medical foods...
October 14, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
Jae-Kwan Jeong, In-Soo Choi, Sung-Ho Moon, Soo-Chan Lee, Hyun-Gu Kang, Young-Hun Jung, Soo-Bong Park, Ill-Hwa Kim
We determined the effect of ketosis treatment with propylene glycol (PG) or PG plus l-carnitine and methionine (Metabolase(®), Fatro, Bologna, Italy) on the resolution, postpartum health, milk yield, and reproductive performances of dairy cows. Blood from 475 Holstein cows was collected weekly until 4 weeks after calving to measure blood β-hydroxybutyrate (BHBA) concentrations. Cows with blood BHBA concentration ≥1.2 mmol/L were diagnosed with ketosis and were enrolled. One hundred and fifty cows diagnosed with ketosis were randomly assigned to three treatment groups (Day 0): (1) PG (300 g, PO) for 3 days (PG group, n = 50), (2) PG (300 g, PO) plus l-carnitine (1...
September 25, 2017: Theriogenology
Kayla J Perkel, Pavneesh Madan
Spent culture medium can provide valuable information regarding the physiological state of a bovine preimplantation embryos through non-invasive analysis of the sum/depleted metabolite constituents. Metabolomics has become of great interest as an adjunct technique to morphological and cleavage-rate assessment, but more importantly, in improving our understanding of metabolism. In this study, in vitro produced bovine embryos developing at different rates were evaluated using proton nuclear magnetic resonance (1H NMR)...
October 16, 2017: Zygote: the Biology of Gametes and Early Embryos
Sun-Young Kang, Bo-Min Kim, Kyung Taek Heo, Jae-Hyuk Jang, Won-Gon Kim, Young-Soo Hong
A new series comprising phenylacetyl‑homoserine lactones (HSL), caffeoyl-HSL and feruloyl-HSL was biologically synthesized using an artificial de novo biosynthetic pathway. We develop an Escherichia coli system containing an artificial biosynthetic pathway that yields phenylacetyl‑HSLs from simple carbon sources. These artificial biosynthetic pathways contained the LuxI-type synthase gene (rpaI) in addition to caffeoyl-CoA and feruloyl-CoA biosynthetic genes, respectively. Finally, the yields for caffeoyl-HSL and feruloyl-HSL were 97...
October 14, 2017: Journal of Microbiology and Biotechnology
Sami Saadi, Nazamid Saari, Abdulkarim Sabo Mohammed, Hasanah Mohd Ghazali, Farooq Anwar
Cell impurities are an emerging nucleating molecular barriers having the capability in disordering the metabolic chain reactions of proteolysis, glycolysis and lipolysis. Their massive effects induced by copolymer crystal growth in compaction with metal and mineral transients are extended as well as in damaging DNA and mRNA structure motif and other molecular assembly e.g. histones structure unites. Their polycrystalline packing modes, polydispersity and their tendency to surface and interface adhesion prompted us in structuring scaffold biomaterials enriched with biopeptides, layered by phospho-glycerides ester-forms...
October 11, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
Maria-Armineh Tossounian, Inge Van Molle, Khadija Wahni, Silke Jacques, Kris Gevaert, Frank Van Breusegem, Didier Vertommen, David Young, Leonardo Astolfi Rosado, Joris Messens
BACKGROUND: Glutathione transferases play an important role as detoxifying enzymes. In A. thaliana, elevated levels of reactive oxygen species (ROS), provoked during biotic and abiotic stress, influence the activity of GSTU23. The aim of this study is to determine the impact of oxidative stress on the function and structure of GSTU23. METHODS: The impact of oxidation on the function of GSTU23 was studied using a glutathione transferase biochemical assay and mass spectrometry...
October 11, 2017: Biochimica et Biophysica Acta
Lene Stødkilde, Vinni K Damborg, Henry Jørgensen, Helle N Laerke, Søren K Jensen
BACKGROUND: The aim was to evaluate white clover as an alternative protein source for monogastrics. White clover plant and leaves were processed using a screw-press resulting in a solid pulp and a juice from which protein was acid-precipitated. The chemical composition of all fractions was determined and digestibility of dry matter (DM) and protein was assessed in an experiment with growing rats. RESULTS: Protein concentrates were produced with crude protein (CP) content of 451 g/kg DM and 530 g/kg DM for white clover plant and leaves, respectively and a pulp with CP content of 313 and 374 g/kg DM from plant and leaves, respectively...
October 14, 2017: Journal of the Science of Food and Agriculture
Andreja Vanzo, Lucija Janeš, Franc Požgan, Špela Velikonja Bolta, Paolo Sivilotti, Klemen Lisjak
Varietal thiol precursors in grapes are subject to metabolic changes during post-harvest treatments. Metabolic activity should therefore be limited after sampling to understand their biosynthesis in the berry and genetic regulation. In this study, berries were frozen in liquid nitrogen immediately after harvesting, transported in dry ice, stored briefly at -80 °C, cryo-milled and extracted without being thawed in cold methanol in a ratio of 1:4 (w/v). A UHPLC-MS/MS method for quantitative determination of the thiol precursors 3-S-glutathionylhexan-1-ol (G3MH), 3-S-cysteinylhexan-1-ol (Cys3MH), 4-S-glutathionyl-4-methylpentan-2-one (G4MMP) and 4-S-cysteinyl-4-methylpentan-2-one (Cys4MMP), glutathione, oxidized glutathione and L-methionine in grapes was developed...
October 13, 2017: Scientific Reports
Paolo Tessari, Monica Vettore, Lucia Puricelli, Diego Cecchet, Anna Coracina, Edward Kivanuka
Context: Homocysteine is an independent cardiovascular risk factor and is increased in essential hypertension. Insulin stimulates homocysteine catabolism in healthy individuals. However, the mechanisms of hyperhomocysteinemia and its relationship with insulin resistance in essential hypertension are unknown. Objective: To investigate whole-body methionine and homocysteine kinetics, and the effects of insulin, in essential hypertension. Design & Setting: Eight hypertensive male subjects, and six male normotensive controls, were infused with L-[methyl-2H3,1-13C]methionine for 6 hrs...
September 29, 2017: Journal of Clinical Endocrinology and Metabolism
Semassa Adjobignon Josiane, Anihouvi Victor Bienvenu, Padonou Segla Wilfried, Adjanohoun Adolphe, Aly Djima, Gbenou Joachin, Baba-Moussa Lamine
BACKGROUND AND OBJECTIVE: A wide range of maize varieties is used in Benin but information on the nutritional characteristics of these varieties are not well known. This study aims to assess the nutritional composition of maize varieties in use in the southern region of Benin with the purpose of providing consumers accurate information for better choice. MATERIALS AND METHODS: Moisture, ash, protein, fiber and fat contents were determined according to Association of Official Analytical Chemists and American Association of Cereal Chemists methods...
2017: Pakistan Journal of Biological Sciences: PJBS
E Gasparino, A P Del Vesco, A S Khatlab, V Zancanela, D O Grieser, S C C Silva
We evaluated the effects of heat stress (HS) and methionine supplementation on biological markers of stress and expression of the genes for superoxide dismutase (SOD), thioredoxin (TRx), thioredoxin reductase 1 (TRxR1) and methionine sulfoxide reductase A (MsrA) in broilers aged 1 to 21 or 22 to 42 days. The broilers were divided into two treatments, one with the recommended level of methionine supplementation (MS, supplementation of dl-2-hydroxy-4-methylthiobutanoic acid (dl-HMTBA)) and one without methionine supplementation (MD)...
October 12, 2017: Animal: An International Journal of Animal Bioscience
Rita Azeredo, Marina Machado, António Afonso, Camino Fierro-Castro, Felipe E Reyes-López, Lluis Tort, Manuel Gesto, Marta Conde-Sieira, Jesús M Míguez, José L Soengas, Eva Kreuz, Sven Wuertz, Helena Peres, Aires Oliva-Teles, Benjamin Costas
Methionine and tryptophan appear to be fundamental in specific cellular pathways involved in the immune response mechanisms, including stimulation of T-regulatory cells by tryptophan metabolites or pro-inflammatory effects upon methionine supplementation. Thus, the aim of this study was to evaluate the immunomodulatory effect of these amino acids on the inflammatory and neuroendocrine responses in juveniles of European seabass, Dicentrarchus labrax. To achieve this, goal fish were fed for 14 days methionine and tryptophan-supplemented diets (MET and TRP, respectively, 2× dietary requirement level) or a control diet meeting the amino acids requirement levels (CTRL)...
2017: Frontiers in Immunology
Shuang Tang, Yi Fang, Gang Huang, Xiaojiang Xu, Elizabeth Padilla-Banks, Wei Fan, Qing Xu, Sydney M Sanderson, Julie F Foley, Scotty Dowdy, Michael W McBurney, David C Fargo, Carmen J Williams, Jason W Locasale, Ziqiang Guan, Xiaoling Li
Methionine metabolism is critical for epigenetic maintenance, redox homeostasis, and animal development. However, the regulation of methionine metabolism remains unclear. Here, we provide evidence that SIRT1, the most conserved mammalian NAD(+)-dependent protein deacetylase, is critically involved in modulating methionine metabolism, thereby impacting maintenance of mouse embryonic stem cells (mESCs) and subsequent embryogenesis. We demonstrate that SIRT1-deficient mESCs are hypersensitive to methionine restriction/depletion-induced differentiation and apoptosis, primarily due to a reduced conversion of methionine to S-adenosylmethionine...
October 11, 2017: EMBO Journal
Eleonora Gatta, James Auta, David P Gavin, Dulal K Bhaumik, Dennis R Grayson, Subhash C Pandey, Alessandro Guidotti
BACKGROUND: Cerebellum is an area of the brain particularly sensitive to the effects of acute and chronic alcohol consumption. Alcohol exposure decreases cerebellar Purkinje cell output by increasing GABA release from Golgi cells onto extrasynaptic α6/δ-containing GABAA receptors located on glutamatergic granule cells. Here, we studied whether chronic alcohol consumption induces changes in GABAA receptor subunit expression and whether these changes are associated with alterations in epigenetic mechanisms via DNA methylation...
August 19, 2017: International Journal of Neuropsychopharmacology
Md Abul Kalam Azad, Pan Huang, Gang Liu, Wenkai Ren, Tsegay Teklebrh, Wenxin Yan, Xihong Zhou, Yulong Yin
Hyperhomocysteinemia is an independent risk factor for cardiovascular disease and is associated with primary causes of mortality and morbidity throughout the world. Several studies have been carried out to evaluate the effects of a diet inducing cystathionine-β-synthase, methyltetrafolate, folic acid, and vitamin B supplemented with methionine on the homocysteine metabolism and in lowering the plasma total homocysteine levels. A large number of molecular and biomedical studies in numerous animals, such as mice, rabbits, and pigs, have sought to elevate the plasma total homocysteine levels and to identify a disease model for human hyperhomocysteinemia...
October 10, 2017: Amino Acids
Nina Poetsch, Adelheid Woehrer, Johanna Gesperger, Julia Furtner, Alexander R Haug, Dorothee Wilhelm, Georg Widhalm, Georgios Karanikas, Michael Weber, Ivo Rausch, Markus Mitterhauser, Wolfgang Wadsak, Marcus Hacker, Matthias Preusser, Tatjana Traub-Weidinger
Background: Few data exist regarding the prognostic value of L-[S-methyl- 11C]methionine (MET) PET for treatment-naive gliomas. Methods: A total of 160 glioma patients (89 men, 71 women, mean age: 45, range 18 - 84 yrs) underwent a MET PET prior to any therapy. The PET scans were evaluated visually and semiquantitatively by tumor to background (T/N) ratio thresholds chosen by ROC-Analysis. Additionally, isocitrate dehydrogenase 1-R132H (IDH1-R132H) immunohistochemistry was performed...
September 9, 2017: Neuro-oncology
Kentaro Takada, Raku Irie, Rei Suo, Shigeki Matsunaga
Direct comparison of authentic ciliatamide A with four synthetic isomers (1-4) by means of NMR and chiral-phase HPLC revealed that ciliatamide A possesses the 12R (d-N-MePhe residue) and 22S (l-Lys residue) configurations, which were not identical with either our previous assignment or those proposed by others through total synthesis. The absolute configuration of the methionine sulfoxide residue in ciliatamide D was also revised to be d.
October 10, 2017: Journal of Natural Products
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