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https://www.readbyqxmd.com/read/28545154/site-specific-phosphorylation-of-casein-kinase-1-%C3%AE-ck1%C3%AE-regulates-its-activity-towards-the-circadian-regulator-per2
#1
Gracie Wee Ling Eng, Edison, David M Virshup
Circadian rhythms are intrinsic ~24 hour cycles that regulate diverse aspects of physiology, and in turn are regulated by interactions with the external environment. Casein kinase 1 delta (CK1δ, CSNK1D) is a key regulator of the clock, phosphorylating both stabilizing and destabilizing sites on the PER2 protein, in a mechanism known as the phosphoswitch. CK1δ can itself be regulated by phosphorylation on its regulatory domain, but the specific sites involved, and the role this plays in control of circadian rhythms as well as other CK1-dependent processes is not well understood...
2017: PloS One
https://www.readbyqxmd.com/read/28545045/differences-in-speb-protease-activity-among-group-a-streptococci-associated-with-superficial-invasive-and-autoimmune-disease
#2
Anhphan T Ly, John P Noto, Odaelys L Walwyn, Robert R Tanz, Stanford T Shulman, William Kabat, Debra E Bessen
The secreted cysteine proteinase SpeB is an important virulence factor of group A streptococci (GAS), whereby SpeB activity varies widely among strains. To establish the degree to which SpeB activity correlates with disease, GAS organisms were recovered from patients with pharyngitis, impetigo, invasive disease or acute rheumatic fever (ARF), and selected for analysis using rigorous sampling criteria; >300 GAS isolates were tested for SpeB activity by casein digestion assays, and each GAS isolate was scored as a SpeB-producer or non-producer...
2017: PloS One
https://www.readbyqxmd.com/read/28542923/the-polysialic-acid-mimetics-idarubicin-and-irinotecan-stimulate-neuronal-survival-and-neurite-outgrowth-and-signal-via-protein-kinase-c
#3
Gabriele Loers, Steven Astafiev, Yuliya Hapiak, Vedangana Saini, Bibhudatta Mishra, Sheraz Gul, Gurcharan Kaur, Melitta Schachner, Thomas Theis
Polysialic acid (PSA) is a large, negatively charged, linear homopolymer of alpha2-8-linked sialic acid residues. It is generated by two polysialyltransferases and attached to N- and/or O-linked glycans, and its main carrier is the neural cell adhesion molecule NCAM. PSA controls the development and regeneration of the nervous system by enhancing cell migration, axon pathfinding, synaptic targeting, synaptic plasticity, by regulating the differentiation of progenitor cells and by modulating cell-cell and cell-matrix adhesions...
May 24, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28542880/suicidal-death-of-erythrocytes-in-cancer-and-its-chemotherapy-a-potential-target-in-the-treatment-of-tumor-associated-anemia
#4
REVIEW
Elisabeth Lang, Rosi Bissinger, Syed M Qadri, Florian Lang
In analogy to apoptosis of nucleated cells, erythrocytes may enter eryptosis characterized by cell shrinkage and cell membrane scrambling. Eryptotic erythrocytes are rapidly cleared from circulating blood and may adhere to the vascular wall. Stimulation of eryptosis thus impairs microcirculation and leads to anemia as soon as the loss of erythrocytes cannot be fully compensated by enhanced erythropoiesis. Signaling stimulating eryptosis includes increase of cytosolic Ca(2+) -activity, ceramide, caspases, calpain, p38-kinase, protein-kinase C, Janus-activated kinase 3, casein-kinase 1α, and cyclin-dependent kinase 4...
May 23, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28538871/what-do-cochrane-systematic-reviews-say-about-interventions-for-autism-spectrum-disorders
#5
Larissa Lyra, Luiz Eduardo Rizzo, Camila Sá Sunahara, Daniela Vianna Pachito, Carolina de Oliveira Cruz Latorraca, Ana Luiza Cabrera Martimbianco, Rachel Riera
CONTEXT AND OBJECTIVE: Autism spectrum disorders (ASDs) include autistic disorder, Asperger's disorder and pervasive developmental disorder. The manifestations of ASDs can have an important impact on learning and social functioning that may persist during adulthood. The aim here was to summarize the evidence from Cochrane systematic reviews on interventions for ASDs. DESIGN AND SETTING: Review of systematic reviews, conducted within the Discipline of Evidence-Based Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo...
March 2017: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/28536184/pre-sleep-dietary-protein-derived-amino-acids-are-incorporated-in-myofibrillar-protein-during-post-exercise-overnight-recovery
#6
Jorn Trommelen, Imre W K Kouw, Andrew M Holwerda, Tim Snijders, Shona L Halson, Ian Rollo, Lex B Verdijk, Luc J C van Loon
The purpose of this study was to determine the impact of ingesting 30 g casein protein with and without 2 g free leucine prior to sleep on myofibrillar protein synthesis rates during post-exercise overnight recovery. 36 healthy young males performed a single bout of resistance-type exercise in the evening (19:45 h) after a full day of dietary standardization. Thirty min prior to sleep (23:30 h), subjects ingested 30 g intrinsically L-[1-(13)C]-phenylalanine-labeled protein with (PRO+leu, n=12) or without (PRO, n=12) 2 g free leucine, or a noncaloric placebo (PLA, n=12)...
May 23, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28535697/identification-of-peptides-present-in-sour-milk-whey-that-ameliorate-scopolamine-induced-memory-impairment-in-mice
#7
Kazuhito Ohsawa, Naoto Uchida, Kohji Ohki, Hidehiko Yokogoshi
Cognitive impairment is treated with cholinesterase inhibitors that slow cognitive decline but cause significant adverse effects. Functional foods that improve memory without such effects would therefore be valuable. We reported that unidentified components of sour milk whey produced by fermentations using Lactobacillus helveticus and Saccharomyces cerevisiae improved memory in a mouse model of scopolamine-induced memory impairment. Here, we show that casein-derived peptides were the most active components of orally administered fractions of this milk product...
May 23, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28535537/triggering-of-suicidal-erythrocyte-death-by-exemestane
#8
Abdulla Al Mamun Bhuyan, Rosi Bissinger, Hang Cao, Florian Lang
BACKGROUND/AIMS: The steroidal aromatase inactivator exemestane blocks estrogen biosynthesis and is thus employed for the prevention and treatment of breast cancer. Exemestane is in part effective by stimulation of suicidal cell death or apoptosis. Side effects of exemestane treatment include anemia. At least in theory, exemestane induced anemia could be secondary to stimulation of suicidal erythrocyte death or eryptosis, characterized by cell shrinkage and cell membrane scrambling with phosphatidylserine translocation to the erythrocyte surface...
May 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28533810/tc003132-is-essential-for-the-follicle-stem-cell-lineage-in-telotrophic-tribolium-oogenesis
#9
Matthias Teuscher, Nadi Ströhlein, Markus Birkenbach, Dorothea Schultheis, Michael Schoppmeier
BACKGROUND: Stem cells are undifferentiated cells with a potential for self-renewal, which are essential to support normal development and homeostasis. To gain insight into the molecular mechanisms underlying adult stem cell biology and organ evolution, we use the telotrophic ovary of the beetle Tribolium. To this end, we participated in a large-scale RNAi screen in the red flour beetle Tribolium, which identified functions in embryonic and postembryonic development for more than half of the Tribolium genes...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28533219/obesity-linked-phosphorylation-of-sirt1-by-ck2-inhibits-its-nuclear-localization-and-promotes-fatty-liver
#10
Sung E Choi, Sanghoon Kwon, Sunmi Seok, Zhen Xiao, Kwan-Woo Lee, Yup Kang, Xiaoling Li, Kosaku Shinoda, Shingo Kajimura, Byron Kemper, Jongsook Kim Kemper
Sirtuin1 (SIRT1) deacetylase delays and improves many obesity-related diseases, including non-alcoholic fatty liver disease (NAFLD) and diabetes, and has received great attention as a drug target. SIRT1 function is aberrantly low in obesity, so understanding the underlying mechanisms is important for drug development. Here, we show that obesity-linked phosphorylation of SIRT1 inhibits its function and promotes pathological symptoms of NAFLD. In proteomic analysis, Ser-164 was identified as a major serine phosphorylation site in SIRT1 in obese, but not lean, mice, and this phosphorylation was catalyzed by casein kinase-2 (CK2), the levels of which were dramatically elevated in obesity...
May 22, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28533032/design-and-synthesis-of-an-immobilized-metal-affinity-chromatography-and-metal-oxide-affinity-chromatography-hybrid-material-for-improved-phosphopeptide-enrichment
#11
Da-Song Yang, Xi-Ying Ding, Hong-Ping Min, Bo Li, Meng-Xiang Su, Miao-Miao Niu, Bin Di, Fang Yan
Reversible phosphorylation of proteins is one of the most important post-translational modifications, while the detection of phosphopeptides is difficult due to their low abundance and the signal suppression of nonphosphorylated peptides. Therefore, selective enrichment of phosphopeptides from highly complicated mixtures is vital for MS-based phosphoproteome analysis. Despite various strategies have been developed, there is no single method that is capable of providing full coverage of the whole phosphoproteome...
May 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28529330/dietary-medium-chain-saturated-fatty-acids-induce-gene-expression-of-energy-metabolism-related-pathways-in-adipose-tissue-of-abdominally-obese-subjects
#12
J C Matualatupauw, M Bohl, S Gregersen, K Hermansen, L A Afman
BACKGROUND: Dietary medium-chain saturated fatty acids (MC-SFAs) have been shown to reduce total body fat. Previously, we showed that MC-SFAs prevent body fat accumulation, despite weight gain. Here, we aim to explore potential molecular mechanisms underlying the protective effect of MC-SFAs on body fat gain. METHODS: The DairyHealth study examined the long-term effects of milk protein and milk fat with a low or high content of MC-SFA. In this 12 week, randomized, double-blind, diet intervention study, participants consumed 60 g milk protein (whey or casein) and 63 g milk fat (high MC-SFA or low MC-SFA) daily in a 2 by 2 factorial design...
May 22, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28527801/genetic-and-nongenetic-factors-contributing-to-differences-in-%C3%AE-s-casein-phosphorylation-isoforms-and-other-major-milk-proteins
#13
Z H Fang, H Bovenhuis, A Delacroix-Buchet, G Miranda, D Boichard, M H P W Visker, P Martin
Relative concentrations of αS-casein (αS-CN) phosphorylation isoforms vary considerably among milk of individual cows. We aimed to explore to what extent genetic and other factors contribute to the variation in relative concentrations of αS-CN phosphorylation isoforms and the phosphorylation degree of αS-CN defined as the proportion of isoforms with higher degrees of phosphorylation. We also investigated the associations of genetic variants of milk proteins and casein haplotypes with relative concentrations of αS-CN phosphorylation isoforms and with the phosphorylation degree of αS-CN in French Montbéliarde cattle from the cheese production area of Franche-Comté...
May 17, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28526384/stereology-shows-that-damaged-liver-recovers-after-protein-refeeding
#14
Silvio Pires Gomes, Andréa Almeida Pinto da Silva, Amanda Rabello Crisma, Primavera Borelli, Francisco Javier Hernandez-Blazquez, Mariana P de Melo, Barbara Bacci, Andrzej Loesch, A Augusto Coppi
OBJECTIVE: The aim of the present study was to investigate the putative effects of a low-protein diet on the three-dimensional structure of hepatocytes and determine whether this scenario could be reversed by restoring the adequate levels of protein to the diet. METHODS: Using design-based stereology, the total number and volume of hepatocytes were estimated in the liver of mice in healthy and altered (by protein malnutrition) conditions and after protein renutrition...
June 2017: Nutrition
https://www.readbyqxmd.com/read/28524017/effect-of-homogenisation-in-formation-of-thermally-induced-aggregates-in-a-non-and-low-fat-milk-model-system-with-microparticulated-whey-proteins
#15
Isabel Celigueta Torres, Gema Nieto, Tommy Nylander, Adam Cohen Simonsen, Alexander Tolkach, Richard Ipsen
The objective of the research presented in this paper was to investigate how different characteristics of whey protein microparticles (MWP) added to milk as fat replacers influence intermolecular interactions occurring with other milk proteins during homogenisation and heating. These interactions are responsible for the formation of heat-induced aggregates that influence the texture and sensory characteristics of the final product. The formation of heat-induced complexes was studied in non- and low-fat milk model systems, where microparticulated whey protein (MWP) was used as fat replacer...
May 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28524014/composition-and-enzymatic-activity-in-bulk-milk-from-dairy-farms-with-conventional-or-robotic-milking-systems
#16
Monika Johansson, Åse Lundh, Ruben de Vries, Kerstin Svennersten Sjaunja
The objective of the studies reported in this research communication was to investigate differences in composition and enzymatic activities in bulk milk samples provided from Swedish dairy farms with different management systems, i.e. automated (AMS) and conventional milking systems (CMS). A bulk milk sample was collected from each of 104 dairy farms, 51 using AMS and 53 using CMS, located in the same geographical region. Sampling took place within two consecutive days during the indoor period (October). Milk samples were analysed for contents of total fat and protein, free fatty acids (FFA), caseins and whey proteins, somatic cell count (SCC), pH, plasmin and plasminogen derived activities, and total proteolysis...
May 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28522250/ppargamma-agonists-rescue-increased-phosphorylation-of-fgf14-at-s226-in-the-tg2576-mouse-model-of-alzheimer-s-disease
#17
Wei-Chun J Hsu, Norelle C Wildburger, Sigmund J Haidacher, Miroslav N Nenov, Oluwarotimi Folorunso, Aditya K Singh, Brent C Chesson, Whitney F Franklin, Ibdanelo Cortez, Rovshan G Sadygov, Kelly T Dineley, Jay S Rudra, Giulio Taglialatela, Cheryl F Lichti, Larry Denner, Fernanda Laezza
BACKGROUND: Cognitive impairment in humans with Alzheimer's disease (AD) and in animal models of Aβ-pathology can be ameliorated by treatments with the nuclear receptor peroxisome proliferator-activated receptor-gamma (PPARγ) agonists, such as rosiglitazone (RSG). Previously, we demonstrated that in the Tg2576 animal model of AD, RSG treatment rescued cognitive deficits and reduced aberrant activity of granule neurons in the dentate gyrus (DG), an area critical for memory formation...
May 15, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28521571/milk-caseins-as-useful-vehicle-for-delivery-of-dipyridamole-drug
#18
Hamid Dezhampanah, Masoomeh Esmaili, Leila Hasani
The interaction of bovine milk α- and β-caseins as an efficient drug carrier system with Dipyridamole (DIP) was investigated using spectroscopy and molecular docking studies at different temperatures (20-37(o)C). FTIR, CD and fluorescence spectroscopy methods demonstrated that α- and β-caseins interact with DIP molecule mainly via hydrophobic and hydrophilic interactions and change in secondary structure of α- and β-caseins. DIP showed a higher quenching efficiency and binding constant of α-casein than β-casein...
May 18, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28521324/the-role-of-hydrolyzed-formula-in-allergy-prevention
#19
Michael D Cabana
Asthma, eczema, food allergy, and allergic rhinitis are some of the most common pediatric, chronic conditions in the world. Breastfeeding is the optimal way to feed all infants. For those infants who are exposed to infant formula, some studies suggest that certain partially hydrolyzed or extensively hydrolyzed formulas may decrease the risk of allergic disease compared to nonhydrolyzed formulas for children with a family history of atopic disease. Overall, there is some evidence to suggest that partially hydrolyzed whey formulas and extensively hydrolyzed casein formulas may decrease the risk of developing eczema for infants at high risk of allergic disease...
2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28516055/antimicrobial-and-enzymatic-activity-of-actinomycetes-isolated-from-soils-of-coastal-islands
#20
Ivana Charousová, Juraj Medo, Eva Halenárová, Soňa Javoreková
Microbiological investigation of unexplored ecosystems is crucial for discovering of antibiotic producing actinomycetes. The present study was conducted to determine antimicrobial activity and identify the most active strains. Actinomycetes were isolated using the spread plate technique following by serial dilution of samples on starch casein agar. The screening method consists of primary and secondary testing. The most active isolates were identified based on molecular and cultural methods. 42 out of 66 isolates displayed antimicrobial potential...
April 2017: Journal of Advanced Pharmaceutical Technology & Research
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