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https://www.readbyqxmd.com/read/29153157/a-100-year-review-protein-and-amino-acid-nutrition-in-dairy-cows
#1
Charles G Schwab, Glen A Broderick
Considerable progress has been made in understanding the protein and amino acid (AA) nutrition of dairy cows. The chemistry of feed crude protein (CP) appears to be well understood, as is the mechanism of ruminal protein degradation by rumen bacteria and protozoa. It has been shown that ammonia released from AA degradation in the rumen is used for bacterial protein formation and that urea can be a useful N supplement when lower protein diets are fed. It is now well documented that adequate rumen ammonia levels must be maintained for maximal synthesis of microbial protein and that a deficiency of rumen-degradable protein can decrease microbial protein synthesis, fiber digestibility, and feed intake...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29129236/effects-of-betaine-supplementation-on-nitric-oxide-metabolism-atherosclerotic-parameters-and-fatty-liver-in-guinea-pigs-fed-a-high-cholesterol-plus-methionine-diet
#2
Zeynep Küskü-Kiraz, Sema Genc, Seldağ Bekpınar, Yeşim Ünlücerci, Aydın Çevik, Vakur Olgaç, Figen Gürdöl, Müjdat Uysal
OBJECTIVE: The aim of this study was to investigate the effect of high cholesterol (CHOL) and CHOL + methionine (MET) diets on atherogenic and oxidative index parameters and on the factors that influence nitric oxide (NO) bioavailability. Also, attempts were made to determine whether dietary betaine (BET) resulted in any improvement in the changes that occurred after CHOL + MET administration. METHODS: Guinea pigs were fed chow containing 1.5% CHOL with or without 2% MET for 10 wk...
January 2018: Nutrition
https://www.readbyqxmd.com/read/29128224/effect-of-2-hydroxy-4-methylthio-butanoate-hmtba-on-risk-of-biohydrogenation-induced-milk-fat-depression
#3
M Baldin, G I Zanton, K J Harvatine
Diet-induced milk fat depression (MFD) is a multifactorial condition resulting from the interaction of numerous risk factors, including diet fermentability and unsaturated fatty acids concentration, feed additives, and individual cow effects. 2-Hydroxy-4-(methylthio)butanoate (HMTBa) is a methionine analog that has been observed to increase milk fat in some cases, and interactions with MFD risk factors may exist. The objective was to evaluate the effect of HMTBa supplementation on milk fat synthesis in cows with different levels of milk production and fed diets with increasing risk of biohydrogenation-induced MFD...
November 8, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29121591/proteomic-and-enzymatic-response-under-cr-vi-overload-in-yeast-isolated-from-textile-dye-industry-effluent
#4
Verónica Irazusta, Anahí Romina Bernal, María Cristina Estévez, Lucía I C de Figueroa
Cyberlindnera jadinii M9 and Wickerhamomyces anomalus M10 isolated from textile-dye liquid effluents has shown capacity for chromium detoxification via Cr(VI) biological reduction. The aim of the study was to evaluate the effect of hexavalent chromium on synthesis of novel and/or specific proteins involved in chromium tolerance and reduction in response to chromium overload in two indigenous yeasts. A study was carried out following a proteomic approach with W. anomalus M10 and Cy. jadinii M9 strains. For this, proteins extracts belonging to total cell extracts, membranes and mitochondria were analyzed...
November 6, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29118764/folic-acid-and-homocysteine-in-chronic-kidney-disease-and-cardiovascular-disease-progression-which-comes-first
#5
REVIEW
Giuseppe Cianciolo, Antonio De Pascalis, Luca Di Lullo, Claudio Ronco, Chiara Zannini, Gaetano La Manna
Background: Hyperhomocysteinemia (Hhcy) occurs in about 85% of chronic kidney disease (CKD) patients because of impaired renal metabolism and reduced renal excretion. Folic acid (FA), the synthetic form of vitamin B9, is critical in the conversion of homocysteine (Hcy) to methionine. If there is not enough intake of FA, there is not enough conversion, and Hcy levels are raised. Summary: Hhcy is regarded as an independent predictor of cardiovascular morbidity and mortality in end-stage renal disease...
October 2017: Cardiorenal Medicine
https://www.readbyqxmd.com/read/29116537/critical-analysis-of-excessive-utilization-of-crude-protein-in-ruminants-ration-impact-on-environmental-ecosystem-and-opportunities-of-supplementation-of-limiting-amino-acids-a-review
#6
Imtiaz Hussain Raja Abbasi, Farzana Abbasi, Mohamed E Abd El-Hack, Mervat A Abdel-Latif, Rab N Soomro, Khawar Hayat, Mohamed A E Mohamed, Bello M Bodinga, Junhu Yao, Yangchun Cao
Protein quality plays a key role than quantity in growth, production, and reproduction of ruminants. Application of high concentration of dietary crude protein (CP) did not balance the proportion of these limiting amino acids (AA) at duodenal digesta of high producing dairy cow. Thus, dietary supplementation of rumen-protected AA is recommended to sustain the physiological, productive, and reproductive performance of ruminants. Poor metabolism of high CP diets in rumen excretes excessive nitrogen (N) through urine and feces in the environment...
November 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29103714/ethyl-cellulose-rumen-protected-methionine-alleviates-inflammation-and-oxidative-stress-and-improves-neutrophil-function-during-the-periparturient-period-and-early-lactation-in-holstein-dairy-cows
#7
F Batistel, J M Arroyo, C I M Garces, E Trevisi, C Parys, M A Ballou, F C Cardoso, J J Loor
The periparturient period is the most critical phase in the productive cycle of dairy cows and is characterized by impairment of the immune system. Our objective was to evaluate the effect of feeding ethyl-cellulose rumen-protected methionine (RPM) starting at d -28 from expected parturition through 60 d in milk on biomarkers of inflammation, oxidative stress, and liver function as well as leukocyte function. Sixty multiparous Holstein cows were used in a block design and assigned to either a control or the control plus ethyl-cellulose RPM (Mepron, Evonik Nutrition & Care GmbH)...
November 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29102145/modulating-adipose-tissue-lipolysis-and-remodeling-to-improve-immune-function-during-the-transition-period-and-early-lactation-of-dairy-cows
#8
G Andres Contreras, Clarissa Strieder-Barboza, Jenne De Koster
Despite major advances in our understanding of transition and early lactation cow physiology and the use of advanced dietary, medical, and management tools, at least half of early lactation cows are reported to develop disease and over half of cow deaths occur during the first week of lactation. Excessive lipolysis, usually measured as plasma concentrations of free fatty acids (FFA), is a major risk factor for the development of displaced abomasum, ketosis, fatty liver, and metritis, and may also lead to poor lactation performance...
October 25, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29098470/lysine-and-methionine-supplementation-ameliorates-high-inclusion-of-soybean-meal-inducing-intestinal-oxidative-injury-and-digestive-and-antioxidant-capacity-decrease-of-yellow-catfish
#9
Jun Jiang, Shangxiao Xu, Lin Feng, Yang Liu, Weidan Jiang, Pei Wu, Yan Wang, Ye Zhao, Xiaoqiu Zhou
The yellow catfish Pelteobagrus fulvidraco with initial average weight 16.6 ± 0.17 g were fed three extruded diets for 56 days. Fish meal (FM) diet was formulated as the normal control with 380 g FM and 200 g soybean meal (SBM) kg(-1) diet. The SBM diet was prepared with 220 g FM and 360 g SBM kg(-1) diet without Lys or Met supplementation. The SBM supplement (SBMS) diet was similar to SBM diet and supplemented with Lys and Met to ensure their levels similar to FM diet. The results showed fish fed SBM diet had lower percent weight gain and specific growth rate than the other two groups (P < 0...
November 2, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29081062/effects-of-dietary-supplementation-of-zinc-oxide-and-zinc-methionine-on-layer-performance-egg-quality-and-blood-serum-indices
#10
Mohamed E Abd El-Hack, Mahmoud Alagawany, Ayman S Salah, Mervat A Abdel-Latif, Mohamed F A Farghly
The objective of this study was to evaluate the effectiveness of dietary zinc oxide (ZnO) and zinc methionine (Zn-Met) supplementation on layer performance, quality of egg, some blood constituents, and oxidative status in blood of laying hens. A total of 120 laying hens (Hisex Brown) 22-week-old were indiscriminately allotted into five groups of 24 hens with six replications (four birds/replicate). A complete randomized design experiment was performed including control (basal diet), two levels of ZnO (50 and 100 mg/kg basal diet), and two levels of Zn-Met (50 and 100 mg/kg basal diet) through 22 to 34 weeks of age...
October 28, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/29077932/effects-of-dietary-mn-methionine-supplementation-on-the-egg-quality-of-laying-hens
#11
L L Li, N N Zhang, Y J Gong, M Y Zhou, H Q Zhan, X T Zou
This study was conducted to investigate the effects of dietary manganese-methionine (Mn-Met) supplementation on the egg quality of laying hens. A total of 480 Jinghong-1 strain layers aged 53 wk were divided into 5 groups with 6 replicates of 16 layers. Birds in the control group were fed a diet supplemented with 60 mg Mn/kg in the form of MnSO4; the birds in other 4 experimental groups were fed a diet supplemented with 20, 40, 60, and 80 mg Mn/kg as Mn-Met, respectively. Dietary Mn-Met treatments significantly affected (P < 0...
October 25, 2017: Poultry Science
https://www.readbyqxmd.com/read/29077910/effects-of-supplemental-l-methionine-on-growth-performance-and-redox-status-of-turkey-poults-compared-with-the-use-of-dl-methionine
#12
I Park, T Pasquetti, R D Malheiros, P R Ferket, S W Kim
This study was conducted to test the effects of dietary supplementation of feed grade L-Met on growth performance and redox status of turkey poults compared with the use of conventional DL-Met. Three hundred and eighty five newly hatched turkey poults were weighed and allotted to 5 treatments in a completely randomized design and the birds were fed dietary treatments for 28 d, including a basal diet (BD), the BD + 0.17 or 0.33% DL-Met or L-Met (representing 60, 75, and 90% of the requirement by National Research Council (NRC) for S containing AA, respectively)...
October 25, 2017: Poultry Science
https://www.readbyqxmd.com/read/29073061/engineering-sulfur-storage-in-maize-seed-proteins-without-apparent-yield-loss
#13
Jose Planta, Xiaoli Xiang, Thomas Leustek, Joachim Messing
Sulfur assimilation may limit the pool of methionine and cysteine available for incorporation into zeins, the major seed storage proteins in maize. This hypothesis was tested by producing transgenic maize with deregulated sulfate reduction capacity achieved through leaf-specific expression of the Escherichia coli enzyme 3'-phosphoadenosine-5'-phosphosulfate reductase (EcPAPR) that resulted in higher methionine accumulation in seeds. The transgenic kernels have higher expression of the methionine-rich 10-kDa δ-zein and total protein sulfur without reduction of other zeins...
October 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29072374/2-hydroxy-4-methylthio-butanoic-acid-and-dl-methionine-for-japanese-quails-in-production
#14
D V G Vieira, F G P Costa, M R Lima, J G de V Júnior, T P Bonaparte, D T Cavalcante
An experiment was performed using 1,000 laying Japanese quails to assess the availability of two alternative dietary methionine sources. Treatment 01 = Basal Feed that is deficient in digestible methionine + cystine (Met + Cys). The other treatments were constituted by Met + Cys levels of 0.8, 1.60 and 2.40 g/kg, supplemented with DL-Methionine-99%, HMTBA-88% and HMTBA-84%, being 10 treatments in total. The following characteristics were studied: feed intake (g/bird/day), egg production (egg/day × 100), egg weight (g/egg), egg mass (g/egg), feed conversion per egg dozen (kg feed/dozen eggs), feed conversion per egg mass (kg feed/kg eggs), relative yolk weight (g/100 g of egg), relative albumen weight (g/100 g of egg), relative shell weight (g/100 g of egg), shell thickness (mm) and specific gravity (g/cm(3) )...
October 26, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/29061666/suppression-of-a-thermosensitive-zipa-cell-division-mutant-by-altering-amino-acid-metabolism
#15
Daniel Vega Mendoza, William Margolin
ZipA is essential for cell division in Escherichia coli, acting early in the process to anchor polymers of FtsZ to the cytoplasmic membrane. Along with FtsA, FtsZ and ZipA form a proto-ring at midcell that recruits additional proteins to eventually build the division septum. Cells carrying the thermosensitive zipA1 allele divide fairly normally at 30°C in rich medium but cease dividing at temperatures above 34°C, forming long filaments. In a search for suppressors of zipA1, we found that deletions of specific genes involved in amino acid biosynthesis could partially cell rescue growth and division at 34°C or 37°C, but not at 42°C...
October 23, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/29054859/quality-protein-maize-based-on-reducing-sulfur-in-leaf-cells
#16
Jose Planta, Joachim Messing
Low levels of the essential amino acids lysine (Lys) and methionine (Met) in a maize-based diet are a major cost to feed and food. Lys deficiency is due to the abundance of Lys-poor proteins in maize kernels. Although a maize mutant, opaque-2 (o2), has sufficient levels of Lys, its soft kernel renders it unfit for storage and transportation. Breeders overcame this problem by selecting quantitative trait loci (QTLs) restoring kernel hardness in the presence of o2, a variety called Quality Protein Maize (QPM)...
October 20, 2017: Genetics
https://www.readbyqxmd.com/read/29051826/apparent-and-standardized-ileal-nutrient-digestibility-of-broiler-diets-containing-varying-levels-of-raw-full-fat-soybean-and-microbial-protease
#17
Mammo M Erdaw, Rider A Perez-Maldonado, Paul A Iji
BACKGROUND: Although soybean meal (SBM) is excellent source of protein in diets for poultry, it is sometimes inaccessible, costly and fluctuates in supply. The SBM can partially be replaced by full-fat SBM, but the meals prepared from raw full-fat soybean contain antinutritional factors. To avoid the risk of antinutritional factors, heat treatment is always advisable, but either excessive or under heating the soybean could negatively affect the quality. However, the potential for further improvement of SBM by supplementing with microbial enzymes has been suggested by many researchers...
2017: Journal of Animal Science and Technology
https://www.readbyqxmd.com/read/29035969/effects-of-medical-food-leucine-content-in-the-management-of-methylmalonic-and-propionic-acidemias
#18
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
https://www.readbyqxmd.com/read/29022519/effects-of-methionine-hydroxy-analogue-supplementation-on-the-expression-of-antioxidant-related-genes-of-acute-heat-stress-exposed-broilers
#19
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
https://www.readbyqxmd.com/read/29021795/neuroendocrine-and-immune-responses-undertake-different-fates-following-tryptophan-or-methionine-dietary-treatment-tales-from-a-teleost-model
#20
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
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