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Casein protein

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https://www.readbyqxmd.com/read/28812326/effect-of-dietary-components-from-antarctic-krill-on-atherosclerosis-in-apoe-deficient-mice
#1
Cinzia Parolini, Bodil Bjorndal, Marco Busnelli, Stefano Manzini, Giulia S Ganzetti, Federica Dellera, Marie Ramsvik, Inge Bruheim, Rolf Kristian Berge, Giulia Chiesa
SCOPE: Antarctic krill is a great source of n-3 fatty acids and high-quality proteins. Aim of the study was to evaluate the effect of Antarctic krill components on plasma lipids and atherosclerosis development. METHODS AND RESULTS: Sixty apoEKO mice were divided into four groups and fed Western diet (CONTROL) or Western-like diets, differing for protein or fat content. Specifically, casein or fat in CONTROL was partially replaced by krill proteins (PRO), krill oil (KRILL OIL), or both (KRILL OIL+PRO)...
August 15, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28804941/proteomic-analysis-to-unravel-the-effect-of-heat-stress-on-gene-expression-and-milk-synthesis-in-bovine-mammary-epithelial-cells
#2
Lian Li, Yiru Wang, Chengmin Li, Genlin Wang
Heat stress can play a negative effect on milk yield and composition of dairy cattle, leading to immeasurable economic loss. The basic components of the mammary gland are the alveoli; these alveolar mammary epithelial cells reflect the milk producing ability of dairy cows. In this study, we exposed bovine mammary epithelial cells to heat stress and compared them to a control group using isobaric tags for relative and absolute quantitation combined with liquid chromatography coupled with tandem mass spectrometry...
August 14, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28798962/structural-pathway-of-regulated-substrate-transfer-and-threading-through-an-hsp100-disaggregase
#3
Célia Deville, Marta Carroni, Kamila B Franke, Maya Topf, Bernd Bukau, Axel Mogk, Helen R Saibil
Refolding aggregated proteins is essential in combating cellular proteotoxic stress. Together with Hsp70, Hsp100 chaperones, including Escherichia coli ClpB, form a powerful disaggregation machine that threads aggregated polypeptides through the central pore of tandem adenosine triphosphatase (ATPase) rings. To visualize protein disaggregation, we determined cryo-electron microscopy structures of inactive and substrate-bound ClpB in the presence of adenosine 5'-O-(3-thiotriphosphate), revealing closed AAA+ rings with a pronounced seam...
August 2017: Science Advances
https://www.readbyqxmd.com/read/28798733/beef-chicken-and-soy-proteins-in-diets-induce-different-gut-microbiota-and-metabolites-in-rats
#4
Yingying Zhu, Xuebin Shi, Xisha Lin, Keping Ye, Xinglian Xu, Chunbao Li, Guanghong Zhou
Previous studies have paid much attention to the associations between high intake of meat and host health. Our previous study showed that the intake of meat proteins can maintain a more balanced composition of gut bacteria as compared to soy protein diet. However, the associations between dietary protein source, gut bacteria, and host health were still unclear. In this study, we collected colonic contents from the growing rats fed with casein, beef, chicken or soy proteins for 90 days, and analyzed the compositions of gut microbiota and metabolites...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28798693/phosphorylation-modulates-ameloblastin-self-assembly-and-ca-2-binding
#5
Øystein Stakkestad, Ståle P Lyngstadaas, Bernd Thiede, Jiri Vondrasek, Bjørn S Skålhegg, Janne E Reseland
Ameloblastin (AMBN), an important component of the self-assembled enamel extra cellular matrix, contains several in silico predicted phosphorylation sites. However, to what extent these sites actually are phosphorylated and the possible effects of such post-translational modifications are still largely unknown. Here we report on in vitro experiments aimed at investigating what sites in AMBN are phosphorylated by casein kinase 2 (CK2) and protein kinase A (PKA) and the impact such phosphorylation has on self-assembly and calcium binding...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28797931/changes-in-the-gut-microbial-communities-following-addition-of-walnuts-to-the-diet
#6
Lauri O Byerley, Derrick Samuelson, Eugene Blanchard, Meng Luo, Brittany N Lorenzen, Shelia Banks, Monica A Ponder, David A Welsh, Christopher M Taylor
Walnuts are rich in omega-3 fatty acids, phytochemicals and antioxidants making them unique compared to other foods. Consuming walnuts has been associated with health benefits including a reduced risk of heart disease and cancer. Dysbiosis of the gut microbiome has been linked to several chronic diseases. One potential mechanism by which walnuts may exert their health benefit is through modifying the gut microbiome. This study identified the changes in the gut microbial communities that occur following the inclusion of walnuts in the diet...
July 9, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28793293/triggering-of-eryptosis-the-suicidal-erythrocyte-death-by-mammalian-target-of-rapamycin-mtor-inhibitor-temsirolimus
#7
Abdulla Al Mamun Bhuyan, Hang Cao, Florian Lang
BACKGROUND/AIMS: The mammalian target of rapamycin (mTOR) inhibitor temsirolimus is utilized for the treatment of malignancy. Temsirolimus is at least in part effective by triggering suicidal tumor cell death. The most common side effect of temsirolimus treatment is anemia. At least in theory, the anemia following temsirolimus treatment could result from stimulation of eryptosis, the suicidal erythrocyte death. Hallmarks of eryptosis include cell shrinkage and cell membrane scrambling with phosphatidylserine translocation to the erythrocyte surface...
July 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28791512/purification-of-angiotensin-i-converting-enzyme-ace-inhibitory-peptides-from-casein-hydrolysate-by-imac-ni-2
#8
Shanguang Wu, Xuezhen Feng, Yuan Lu, Yuting Lu, Saisai Liu, Yuhong Tian
Casein proteins were hydrolyzed by papain to identify inhibitory peptides of angiotensin I-converting enzyme (ACE). The hydrolysate was fractionized by immobilized metal affinity chromatography (IMAC-Ni(2+)). The fraction with high ACE inhibitory activity was enriched and further chromatographed on a reverse-phase column to yield four fractions. Among the fractions, the L4 fraction exhibited the highest ACE inhibitory activity and was identified by sequence analysis as Trp-Tyr-Leu-His-Tyr-Ala (WYLHYA), with IC50 value of 16...
August 8, 2017: Amino Acids
https://www.readbyqxmd.com/read/28791381/protective-effect-of-diminazene-attenuates-myocardial-infarction-in-rats-via-increased-inflammation-and-ace2-activity
#9
Junjiang Chen, Lianqun Cui, Jingliang Yuan, Songcun Zhang, Rongmei Ma, Hongjun Sang, Qingjiang Liu, Lianfeng Shan
The present study aimed to investigate whether diminazene attenuates myocardial infarction (MI) in rats. In addition, the present study investigated whether ACE2 signaling was involved in the effects of diminazene on protein function. A rat model of acute myocardial infarction (AMI) was established by occlusion of the left anterior descending coronary artery. The AMI model rats received intraperitoneal injections of diminazene (5 mg/kg/day) for 3 days. Treatment with diminazene significantly inhibited the expression of casein kinase and lactate dehydrogenase, and reduced infarct size in AMI rats...
August 3, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28791293/differential-effects-of-high-protein-diets-derived-from-soy-and-casein-on-blood-brain-barrier-integrity-in-wild-type-mice
#10
Matthew Snelson, John C L Mamo, Virginie Lam, Corey Giles, Ryusuke Takechi
A number of studies report that a diet high in protein influences cognitive performance, but the results are inconsistent. Studies demonstrated that protein from different food sources has differential effects on cognition. It is increasingly recognized that the integrity of cerebrovascular blood-brain barrier (BBB) is pivotal for central nervous system function. However, to date, no studies have reported the effects of high-protein diets on BBB integrity. Therefore, in this study, the effects of diets enriched in casein or soy protein on BBB permeability were investigated...
2017: Frontiers in Nutrition
https://www.readbyqxmd.com/read/28783066/utility-of-milk-coagulant-enzyme-of-moringa-oleifera-seed-in-cheese-production-from-soy-and-skim-milks
#11
María Alejandra Sánchez-Muñoz, Mónica Andrea Valdez-Solana, Claudia Avitia-Domínguez, Patricia Ramírez-Baca, María Guadalupe Candelas-Cadillo, Miguel Aguilera-Ortíz, Jorge Armando Meza-Velázquez, Alfredo Téllez-Valencia, Erick Sierra-Campos
In this study, the potential use of Moringa oleifera as a clotting agent of different types of milk (whole, skim, and soy milk) was investigated. M. oleifera seed extract showed high milk-clotting activity followed by flower extract. Specific clotting activity of seed extract was 200 times higher than that of flower extract. Seed extract is composed by four main protein bands (43.6, 32.2, 19.4, and 16.3 kDa). Caseinolytic activity assessed by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and tyrosine quantification, showed a high extent of casein degradation using M...
August 5, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28767100/adsorption-of-milk-proteins-%C3%AE-casein-and-%C3%AE-lactoglobulin-and-bsa-onto-hydrophobic-surfaces
#12
Leonor Pérez-Fuentes, Carlos Drummond, Jordi Faraudo, Delfi Bastos-González
Here, we study films of proteins over planar surfaces and protein-coated microspheres obtained from the adsorption of three different proteins ( β -casein, β -lactoglobulin and bovine serum albumin (BSA)). The investigation of protein films in planar surfaces is performed by combining quartz crystal microbalance (QCM) and atomic force microscopy (AFM) measurements with all-atomic molecular dynamics (MD) simulations. We found that BSA and β -lactoglobulin form compact monolayers, almost without interstices between the proteins...
August 2, 2017: Materials
https://www.readbyqxmd.com/read/28765774/increase-in-dietary-protein-content-exacerbates-colonic-inflammation-and-tumorigenesis-in-azoxymethane-induced-mouse-colon-carcinogenesis
#13
Ka-Hee Tak, Eunyeong Ahn, Eunjung Kim
BACKGROUND/OBJECTIVE: The incidence of colorectal cancer (CRC) has been attributed to higher intake of fat and protein. However, reports on the relationship between protein intake and CRC are inconsistent, possibly due to the complexity of diet composition. In this study, we addressed a question whether alteration of protein intake is independently associated with colonic inflammation and colon carcinogenesis. MATERIALS/METHODS: Balb/c mice were randomly divided into 4 experimental groups: 20% protein (control, 20P, 20% casein/kg diet), 10% protein (10P, 10% casein/kg diet), 30% protein (30P, 30% casein/kg diet), and 50% protein (50P, 50% casein/kg diet) diet groups and were subjected to azoxymethane-dextran sodium sulfate induced colon carcinogenesis...
August 2017: Nutrition Research and Practice
https://www.readbyqxmd.com/read/28764059/a-two-step-enzymatic-modification-method-to-reduce-immuno-reactivity-of-milk-proteins
#14
Srinivasan Damodaran, Yan Li
A two-step enzymatic approach to reduce immuno-reactivity of whey protein isolate and casein has been studied. The method involves partial hydrolysis of proteins with proteases, followed by repolymerization with microbial transglutaminase. Whey protein isolate partially hydrolyzed with chymotrypsin, trypsin, or thermolysin retained about 80%, 30%, and 20% of the original immuno-reactivity, respectively. Upon repolymerization the immuno-reactivity decreased to 45%, 35%, and 5%, respectively. The immuno-reactivity of hydrolyzed and repolymerized casein was negligible compared to native casein...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28764041/monitoring-the-progression-of-calcium-and-protein-solubilisation-as-affected-by-calcium-chelators-during-small-scale-manufacture-of-casein-based-food-matrices
#15
Irene McIntyre, Michael O'Sullivan, Dolores O'Riordan
Calcium and protein solubilisation during small-scale manufacture of semi-solid casein-based food matrices was investigated and found to be very different in the presence or absence of calcium chelating salts. Calcium concentrations in the dispersed phase increased and calcium-ion activity (ACa(++)) decreased during manufacture of the matrices containing calcium chelating salts; with ∼23% of total calcium solubilised by the end of manufacture. In the absence of calcium chelating salts, these concentrations were significantly lower at equivalent processing times and remained unchanged as did ACa(++), throughout manufacture...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28763979/preparation-of-milk-protein-vitamin-a-complexes-and-their-evaluation-for-vitamin-a-binding-ability
#16
Chitra Gupta, Sumit Arora, M A Syama, Apurva Sharma
The recent trends for consumption of low fat and fat free foods have led to an increase in deficiencies of vitamin A. Vitamin A is susceptible to light and heat and thus require stabilization in aqueous medium. Stability can be improved by binding of vitamin A to milk protein. In the present research work, succinylated milk proteins were also prepared. 3.2 mol of succinic anhydride/mole of lysine content gave maximum degree of succinylation for both sodium caseinate and milk protein concentrate. Native, reassembled and succinylated milk proteins were used for the preparation of milk protein-Vitamin A (Vit A) complexes...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28759641/novel-sensitive-monoclonal-antibody-based-competitive-enzyme-linked-immunosorbent-assay-for-the-detection-of-raw-and-processed-bovine-beta-casein
#17
Daniela S Castillo, Alejandro Cassola
Cow milk protein allergy (CMPA) is the most common childhood food allergy, which can sometimes persist or can newly develop in adulthood with severe symptoms. CMPA's treatment is complete dietary avoidance of milk proteins. To achieve this task, patients have to be aware of milk proteins found as "hidden allergens" in food commodities. In regard to milk proteins, it has been reported that allergenicity of caseins remains unaffected upon heat treatment. For these reasons, we aimed to obtain monoclonal antibodies (mAbs) against native and denatured β-casein, one of the most abundant and antigenic caseins, in order to develop an indirect competitive ELISA (icELISA) to detect and quantify traces of this milk allergen in raw and processed foodstuffs...
2017: PloS One
https://www.readbyqxmd.com/read/28758627/natronospira-proteinivora-gen-nov-sp-nov-an-extremely-salt-tolerant-alkaliphilic-gammaproteobacterium-from-hypersaline-soda-lakes
#18
Dimitry Y Sorokin, Ilya V Kublanov, Tatiana V Khijniak
Brine samples from Kulunda Steppe soda lakes (Altai, Russia) were inoculated into a hypersaline alkaline mineral medium with β-keratin (chicken feather) as a substrate. The micro-organisms dominating the enrichment culture were isolated by limiting serial dilution on the same medium with casein as a substrate. The cells of strain BSker1T were motile, curved rods. The strain was an obligately aerobic heterotroph utilizing proteins and peptides as growth substrates. The isolate was an obligate alkaliphile with a pH range for growth from pH 8...
July 31, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28758352/fast-digestive-leucine-rich-soluble-milk-proteins-improve-muscle-protein-anabolism-and-mitochondrial-function-in-undernourished-old-rats
#19
Jérôme Salles, Audrey Chanet, Alexandre Berry, Christophe Giraudet, Véronique Patrac, Carla Domingues-Faria, Christophe Rocher, Christelle Guillet, Philippe Denis, Corinne Pouyet, Cécile Bonhomme, Pascale Le Ruyet, Yves Rolland, Yves Boirie, Stéphane Walrand
SCOPE: One strategy to manage malnutrition in older patients is to increase protein and energy intake. Here we evaluate the influence of protein quality during refeeding on improvement in muscle protein and energy metabolism. METHODS AND RESULTS: Twenty-month-old male rats (n = 40) were fed 50% of their spontaneous intake for 12 weeks to induce malnutrition, then refed ad libitum with a standard diet enriched with casein or soluble milk proteins (22%) for 4 weeks...
July 31, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28755932/relationships-between-postruminal-casein-infusion-and-milk-production-and-concentrations-of-plasma-amino-acids-and-blood-urea-in-dairy-cows-a-multilevel-mixed-effects-meta-analysis
#20
R Martineau, D R Ouellet, E Kebreab, R R White, H Lapierre
The relationships between postruminal casein infusion and production variables and concentrations of plasma AA and blood urea were evaluated using multilevel mixed-effects models derived from literature data collected in dairy cows. The data set contained 147 treatment means [i.e., 66 controls (CTL) and 81 casein-infused (CAS) means]. Each CAS mean was paired with its corresponding CTL mean to create 81 mean differences (CAS minus CTL), which were analyzed as absolute and percentage-based units (i.e., percentage increase or decrease in CAS relative to CTL)...
July 26, 2017: Journal of Dairy Science
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