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https://www.readbyqxmd.com/read/29141245/roscovitine-a-cdk5-inhibitor-alleviates-sevoflurane-induced-cognitive-dysfunction-via-regulation-tau-gsk3%C3%AE-and-erk-ppar%C3%AE-creb-signaling
#1
Jianhui Liu, Junjun Yang, Yinhua Xu, Gang Guo, Li Cai, Heng Wu, Yanhong Zhao, Xiaoqing Zhang
BACKGROUND/AIMS: Multiple exposures to anesthesia in children may increase the risk of developing cognitive impairment. Sevoflurane is an anesthetic that is commonly used in children during surgery. Cyclin-dependent kinase (CDK) 5 is involved in the regulation of sevoflurane-induced cognitive dysfunction, but the mechanistic details remain unclear. The present study evaluated the mechanism by which CDK5 mediates sevoflurane-induced cognitive dysfunction in mice. METHODS: Hippocampal neurons were isolated from postnatal day 0 C57BL/6 mouse pups...
November 15, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29137853/antidiabetic-antihyperlipidemic-activities-and-herb-drug-interaction-of-a-polyherbal-formulation-in-streptozotocin
#2
Vishnu P Choudhari, Ketkee P Gore, Anil T Pawar
BACKGROUND: Ojamin (OJ), a polyherbal antidiabetic formulation, is extensively used as a food supplement to control diabetes alone or along with synthetic antidiabetic agents. However, it's phytochemical and pharmacological investigations are lacking. OBJECTIVE: The present study was undertaken to study antidiabetic and antihyperlipidemic potentials of OJ and its interaction with Metformin in streptozotocin (STZ)-induced diabetic rats. MATERIALS AND METHODS: Diabetes was induced in Wistar rats by single intraperitoneal (i...
November 11, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/29137482/uphill-running-excessive-training-increases-gastrocnemius-glycogen-content-in-c57bl-6-mice
#3
G P Morais, A da Rocha, A P Pinto, L da C Oliveira, L G de Vicente, G N Ferreira, E C de Freitas, A Sr da Silva
The main aim of the present investigation was to verify the effects of three overtraining (OT) protocols performed in downhill (OTR/down), uphill (OTR/up) and without inclination (OTR) on the protein levels of Akt (Ser473), AMPKalpha (Thr172), PGC-1alpha, plasma membrane GLUT-1 and GLUT-4 as well as on the glycogen contents in mice gastrocnemius. A trained (TR) protocol was used as positive control. Rodents were divided into naive (N, sedentary mice), control (CT, sedentary mice submitted to the performance evaluations), TR, OTR/down, OTR/up and OTR groups...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29137190/spirulina-maxima-extract-ameliorates-learning-and-memory-impairments-via-inhibiting-gsk-3%C3%AE-phosphorylation-induced-by-intracerebroventricular-injection-of-amyloid-%C3%AE-1-42-in-mice
#4
Eun-Jeong Koh, Kui-Jin Kim, Ji-Hyeon Song, Jia Choi, Hyeon Yong Lee, Do-Hyung Kang, Ho Jin Heo, Boo-Yong Lee
Spirulina maxima, a microalga containing high levels of protein and many polyphenols, including chlorophyll a and C-phycocyanin, has antioxidant and anti-inflammatory therapeutic effects. However, the mechanisms where by Spirulina maxima ameliorates cognitive disorders induced by amyloid-β 1-42 (Aβ1-42) are not fully understood. In this study, we investigated whether a 70% ethanol extract of Spirulina maxima (SM70EE) ameliorated cognitive impairments induced by an intracerebroventricular injection of Aβ1-42 in mice...
November 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29136933/alkaline-solubilization-of-excess-mixed-sludge-and-the-recovery-of-released-phosphorus-as-magnesium-ammonium-phosphate
#5
De-Chao Xu, Cong-Qiang Zhong, Kui-Hao Yin, Sheng-Hua Peng, Ting-Ting Zhu, Gong Cheng
The alkaline solubilization of excess mixed sludge was investigated and subsequently the released phosphorus was recovered as magnesium ammonium phosphate (MAP). Considerable and rapid release of glycogen and protein was encountered after alkaline addition into the sludge. Only 45.0% of sludge cells were destructed after 240 min treatment in R1 while the corresponding ratio was 96.1% in R3 according to the release of DNA. Non-apatite inorganic phosphorus (NAIP) in the alkaline treated sludge decreased due to the dissolution of Al(OH)3 and AlPO4, which was the dominant reason for phosphorus release...
October 26, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29136770/magnesium-valproate-ameliorates-type-1-diabetes-and-cardiomyopathy-in-diabetic-rats-through-estrogen-receptors
#6
Samir Rabadiya, Shradhha Bhadada, Ashvin Dudhrejiya, Devendra Vaishnav, Bhoomika Patel
Estrogen is known to exhibit cardioprotective and antihyperlipidemic action. Valproic acid has been shown to upregulate estrogen receptors (ERs) in breast and prostate cancer tissues. No pharmacological evaluations for magnesium valproate (MgV) so far have been done for diabetic cadio-lipidemic complications. Based on the above context, current study was undertaken to evaluate the therapeutic effectiveness of MgV in cardiac complications associated with type-1 diabetes mellitus in rats wherein diabetes was induced by single tail vein injection of streptozotocin (STZ, 45mg/kg, IV) in female Sprague Dawley rats and treatment of MgV (210mg/kg, PO) was given for eight weeks to diabetic animals, after which, various biochemical and cardiac biomarkers, hypertrophic, hemodynamic and histological parameters along with immunohistochemistry of ERs in the left ventricle (LV) were estimated...
November 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29136335/sii-ang-ii-potentiates-insulin-receptor-signalling-and-glycogen-synthesis-in-hepatocytes
#7
Samra Joke Sanni, Christina Lyngsø, Steen Gammeltoft, Jakob Lerche Hansen
The angiotensin II type I receptor (AT1R) is involved in the regulation of cardiovascular function. Excessive activation of AT1R by angiotensin II (Ang II) leads to cardiovascular disease and may be involved in the development of insulin resistance and diabetes. Functionally selective Ang II analogues, such as the [Sar1, Ile4, Ile8]-angiotensin II (SII Ang II) analogue that only activates a subset of signalling networks have been demonstrated to have beneficial effects on cardiovascular function in certain settings, including lowering blood pressure and increasing cardiac performance...
November 14, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29135708/high-permeability-and-intercellular-space-widening-with-brimonidine-tartrate-eye-drops-in-cultured-stratified-human-corneal-epithelial-sheets
#8
Yumi Hashimoto, Seiichi Yokoo, Tomohiko Usui, Yukiko Tsubota, Satoru Yamagami
PURPOSE: To investigate the toxicity of topical glaucoma medications using cultured stratified human corneal epithelial sheets (HCES). METHODS: HCES were exposed for 30 minutes to the following glaucoma medications: 0.1% brimonidine with sodium chlorite as the preservative, 0.005% latanoprost with 0.02% benzalkonium chloride (BAC) as the preservative, and 0.5% timolol with 0.005% BAC as the preservative. Then, cell viability and barrier function were tested by the WST-1 assay and carboxyfluorescein permeability assay, respectively...
November 13, 2017: Cornea
https://www.readbyqxmd.com/read/29134977/metformin-effects-are-augmented-by-chronic-intermittent-cold-stress-in-high-fat-diet-fed-male-wistar-rats
#9
A O Ige, O I Iwaloye, E O Adewoye
This study investigated the effects of metformin on some glucose regulatory indices in high fat diet (HFD) fedmale Wistar rats exposed to room temperature and chronic intermittent cold stress (CICS). Thirty rats were randomly dividedinto 5 groups. Group 1(control) was maintained on standard rat chow while groups 2-5 were maintained on HFD for 8weeksrespectively prior to experimental procedures. Control, group 2(HFD untreated) and group 3(HFD+metformin (250mg/kg)were exposed to room temperature while groups 4(HFD untreated+CICS) and 5(HFD+CICS+metformin) were exposed toCICS for 21days...
June 30, 2017: Nigerian Journal of Physiological Sciences: Official Publication of the Physiological Society of Nigeria
https://www.readbyqxmd.com/read/29134685/in-ovo-feeding-of-nutrients-and-its-impact-on-post-hatching-water-and-feed-deprivation-up-to-48%C3%A2-hr-energy-status-and-jejunal-morphology-of-chicks-using-response-surface-models
#10
M Ghanaatparast-Rashti, M Mottaghitalab, H Ahmadi
A Box-Behnken design (BBD) in a response surface methodology (RSM) was used to investigate the response of broiler chicks to in ovo feeding (IOF) of beta-hydroxy beta-methylbutyrate (HMB), dextrin and the timing of the first water and feed deprivation. On day 18th of incubation, 1,500 eggs were randomly assigned to 15 experimental runs of BBD, each with 4 replicates, as 3 levels IOF of HMB (0%, 0.5% and 1%) and dextrin (0%, 20% and 40%), and 3 levels of the first water and feed deprivation (6, 27 and 48 hr)...
November 13, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/29134553/biological-characterization-of-a-novel-hybrid-copolymer-carrier-system-based-on-glycogen
#11
Markéta Jirátová, Aneta Pospíšilová, Maria Rabyk, Martin Pařízek, Jan Kovář, Andrea Gálisová, Martin Hrubý, Daniel Jirák
The effective drug delivery systems for cancer treatment are currently on high demand. In this paper, biological behavior of the novel hybrid copolymers based on polysaccharide glycogen were characterized. The copolymers were modified by fluorescent dyes for flow cytometry, confocal microscopy, and in vivo fluorescence imaging. Moreover, the effect of oxazoline grafts on degradation rate was examined. Intracellular localization, cytotoxicity, and internalization route of the modified copolymers were examined on HepG2 cell line...
November 13, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/29134466/glycogen-synthase-kinase-3%C3%AE-mediated-regulation-of-matrix-metalloproteinase-9-and-its-involvement-in-oral-squamous-cell-carcinoma-progression-and-invasion
#12
Kamdeo K Pramanik, Siddavaram Nagini, Abhay K Singh, Prajna Mishra, Tanushree Kashyap, Nidhi Nath, Manzar Alam, Ajay Rana, Rajakishore Mishra
PURPOSE: Oral squamous cell carcinoma (OSCC)-related deaths mainly result from invasion of the tumor cells into local cervical lymph nodes. It has been reported that progressive basement membrane loss promotes the metastatic and invasive capacities of OSCCs. Matrix metalloproteinase-9 (MMP-9) is known to play a central role in tumor progression and invasion. However, the role of MMP-9 in OSCC invasion has so far remained paradoxical and little is known about its regulation. Here, we aimed to assess MMP-9 expression regulation and its activation by glycogen synthase kinase-3β during human OSCC progression and invasion...
November 13, 2017: Cellular Oncology (Dordrecht)
https://www.readbyqxmd.com/read/29133865/cold-acclimation-causes-fiber-type-specific-responses-in-glucose-and-fat-metabolism-in-rat-skeletal-muscles
#13
Diane M Sepa-Kishi, Yass Sotoudeh-Nia, Ayesha Iqbal, George Bikopoulos, Rolando B Ceddia
This study investigated fiber type-specific metabolic responses and the molecular mechanisms that regulate glucose and fat metabolism in oxidative and glycolytic muscles upon cold acclimation. Male Wistar rats were exposed to cold (4 °C) for 7 days, and then glycogen synthesis and content, glucose and palmitate oxidation, and the molecular mechanisms underlying these metabolic pathways were assessed in soleus (Sol), extensor digitorum longus (EDL), and epitrochlearis (Epit) muscles. Cold acclimation increased glycogen synthesis, glycogen content, glucose oxidation, and reduced glycogen synthase (GS) phosphorylation only in Sol muscles...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133594/competitive-kinase-enrichment-proteomics-reveals-that-abemaciclib-inhibits-gsk3%C3%AE-and-activates-wnt-signaling
#14
Emily M Cousins, Dennis Goldfarb, Feng Yan, Jose Roques, David B Darr, Gary L Johnson, Michael B Major
The cellular and organismal phenotypic response to a small-molecule kinase inhibitor is defined collectively by the inhibitor's targets and their functions. The selectivity of small-molecule kinase inhibitors is commonly determined in vitro, using purified kinases and substrates. Recently, competitive chemical proteomics has emerged as a complementary, unbiased, cell-based methodology to define the target landscape of kinase inhibitors. Here, we evaluated and optimized a competitive multiplexed inhibitor bead mass spectrometry (MIB/MS) platform using cell lysates, live cells, and treated mice...
November 13, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29133376/distinct-functions-of-starch-synthase-4-domains-in-starch-granule-formation
#15
Kuan-Jen Lu, Barbara Pfister, Camilla Jenny, Simona Eicke, Samuel C Zeeman
The formation of normal starch granules in Arabidopsis leaf chloroplasts requires STARCH SYNTHASE 4 (SS4). In plants lacking SS4, chloroplasts typically produce only one round granule rather than multiple lenticular granules. The mechanisms by which SS4 determines granule number and morphology are not understood. The N-terminal region of SS4 is unique among SS isoforms and contains several long coiled-coil motifs, typically implicated in protein-protein interactions. The C-terminal region contains the catalytic glucosyltransferase domains, which are widely conserved in plant SS and bacterial glycogen synthase (GS) isoforms...
November 13, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29132997/thyroid-hormone-improves-insulin-signaling-and-reduces-the-activation-of-neurodegenerative-pathway-in-the-hippocampus-of-diabetic-adult-male-rats
#16
Fernanda Prieto-Almeida, Ana Carolina Panveloski-Costa, Fernanda Crunfli, Silvania da Silva Teixeira, Maria Tereza Nunes, Andréa da Silva Torrão
AIMS: Diabetes mellitus (DM) and impairments of glucose metabolism and insulin resistance in the brain have been suggested as a likely etiology of Alzheimer's disease (AD). Studies have shown that thyroid hormones (THs) improve insulin sensitivity in DM rats and act as mediators of the plasticity of the nervous system altering behavior and cognitive function. Based on these findings, this study aimed to evaluate the effects of diabetes and triiodothyronine (T3) treatment upon proteins associated with DM and AD in the central nervous system...
November 10, 2017: Life Sciences
https://www.readbyqxmd.com/read/29131712/how-rice-glycogen-synthase-kinase-like-5-osgsk5-integrates-salinity-stress-response-to-source-sink-adaptation-a-proposed-model
#17
Maysaya Thitisaksakul, Shaoyun Dong, Diane M Beckles
We have previously shown that overexpression of GSK3-like kinase 5 in rice (OsGSK5) was associated with higher starch accumulation and better growth under severe salinity stress. Short-term (14)CO2 feeding experiments suggested that OsGSK5 promoted higher flux to starch accumulation in the roots under this condition and that this mechanism may help to underscore the better growth characteristics observed. Here, we expand upon this hypothesis and consider (i) how OsGSK5 action could fit into a signaling model that integrates salinity stress to changes in starch metabolism, and (ii) how this would facilitate whole plant physiological adaptions in source-to-sink partitioning...
November 13, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29130078/hepatic-adaptations-to-a-high-fat-diet-in-the-mrl-mouse-strain-are-associated-with-an-inefficient-oxidative-phosphorylation-system
#18
Ahlke Heydemann, Magdalis González-Vega, Tirsit K Berhanu, Aaron J Mull, Ragav Sharma, Jenan Holley-Cuthrell
The MRL mice are resistant to a 12-week high fat diet (HFD) feeding protocol, with the proximal cause being an increased basal pAMPK(T172) expression in the skeletal muscle. Here, we test if this lack of pathology extends to the liver at both the tissue and cellular levels and its correlation to pAMPK(T172) levels. MRL and B6 mice were subjected to 12 weeks of diet intervention and tissues were either fixed for histology or snap-frozen for further processing (n= 3-6, per group). The HFD MRL mice remain insulin and glucose sensitive after 12 weeks of HFD...
December 2016: Jacobs J Diabetes Endocrinol
https://www.readbyqxmd.com/read/29129679/pecularities-of-the-structure-of-glycogen-as-an-indicator-of-the-functional-state-of-mauthner-neurons-in-fish-perc%C3%B1-ottus-glehni-during-wintering
#19
Irina M Santalova, Rita Ya Gordon, Irina B Mikheeva, Sergei S Khutsian, Eugene I Maevsky
Mauthner neurons (MN)*, specific multifunctional neurons of fish, are a unique object for investigating the adaptive potentialities of the cell. The goal of the work was to study the structure of MN of fish Percсottus glehni during wintering under the conditions of hypothermia and deficit of oxygen and energy substrates. It was shown using a light microscope that the volume of the somatic moiety of neurons changes slightly at the beginning of wintering and is significantly reduced by the termination of wintering...
November 9, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29128891/prmt1-promotes-hyperglycemia-in-a-foxo1-dependent-manner-affecting-glucose-metabolism-during-hypobaric-hypoxia-exposure-in-rat-model
#20
Susovon Bayen, Supriya Saini, Priya Gaur, Arul Joseph Duraisamy, Alpesh Kumar Sharma, Karan Pal, Praveen Vats, Shashi Bala Singh
PURPOSE: High-altitude (HA) environment causes changes in cellular metabolism among unacclimatized humans. Previous studies have revealed that insulin-dependent activation of protein kinase B (Akt) regulates metabolic processes via discrete transcriptional effectors. Moreover, protein arginine methyltransferase (PRMT)1-dependent arginine modification of forkhead box other (FoxO)1 protein interferes with Akt-dependent phosphorylation. The present study was undertaken to test the involvement of PRMT1 on FoxO1 activation during hypobaric hypoxia (HH) exposure in rat model...
November 11, 2017: Endocrine
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