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https://www.readbyqxmd.com/read/28821796/cathepsin-k-knockout-protects-against-cardiac-dysfunction-in-diabetic-mice
#1
Rui Guo, Yinan Hua, Olivia Rogers, Travis E Brown, Jun Ren, Sreejayan Nair
Diabetes is a major risk factor for cardiovascular disease and the lysosomal cysteine protease cathepsin K plays a critical role in cardiac pathophysiology. To expand upon our previous findings, we tested the hypothesis that, knockout of cathepsin K protects against diabetes-associated cardiac anomalies. Wild-type and cathepsin K knockout mice were rendered diabetic by streptozotocin (STZ) injections. Body weight, organ mass, fasting blood glucose, energy expenditure, cardiac geometry and function, cardiac histomorphology, glutathione levels and protein levels of cathepsin K and those associated with Ca(2+) handling, calcineurin/NFAT signaling, insulin signaling, cardiac apoptosis and fibrosis were determined...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821603/a-simple-light-isotope-metabolic-labeling-slim-labeling-strategy-a-powerful-tool-to-address-the-dynamics-of-proteome-variations-in-vivo
#2
Thibaut Léger, Camille Garcia, Laetitia Collomb, Jean-Michel Camadro
Many quantitative proteomics strategies rely on in vivo metabolic incorporation of amino acids with modified stable isotope profiles into proteins. These methods give rise to multiple ions for each peptide, with possible distortion of the isotopolog distribution, making the overall analytical process complex. We validated an alternative strategy, simple light isotope metabolic labeling (SLIM-labeling), which alleviates many of these problems. SLIM-labeling is based on the in vivo reduction of the isotopic composition of proteins using metabolic precursors with a unique light isotope composition to label all amino acids...
August 18, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28820316/cell-cycle-related-metabolism-and-mitochondrial-dynamics-in-a-replication-competent-pancreatic-beta-cell-line
#3
Chiara Montemurro, Suryakiran Vadrevu, Tatyana Gurlo, Alexandra E Butler, Kenny E Vongbunyong, Anton Petcherski, Orian S Shirihai, Leslie S Satin, Daniel Braas, Peter C Butler, Slavica Tudzarova
Cell replication is a fundamental attribute of growth and repair in multicellular organisms. Pancreatic beta-cells in adults rarely enter cell cycle, hindering the capacity for regeneration in diabetes. Efforts to drive beta-cells into cell cycle have so far largely focused on regulatory molecules such as cyclins and cyclin-dependent kinases (CDKs). Investigations in cancer biology have uncovered that adaptive changes in metabolism, the mitochondrial network, and cellular Ca(2+) are critical for permitting cells to progress through the cell cycle...
August 18, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28820290/local-histone-acetylation-by-acss2-promotes-gene-transcription-for-lysosomal-biogenesis-and-autophagy
#4
Xinjian Li, Xu Qian, Zhimin Lu
Overcoming metabolic stress is a critical step in tumorigenesis. Acetyl coenzyme A (acetyl-CoA) converted from glucose or acetate is a substrate used for histone acetylation to regulate gene expression. However, how acetyl-CoA is produced under nutritional stress conditions is unclear. Herein we report that nutritional stress induces nuclear translocation of ACSS2 (acyl-CoA synthetase short-chain family member 2). This translocation is mediated by AMP-activated protein kinase (AMPK)-dependent ACSS2 Ser659 phosphorylation and subsequent exposure of the nuclear localization signal of ACSS2 to KPNA1/importin α5 for binding...
August 18, 2017: Autophagy
https://www.readbyqxmd.com/read/28819582/relationship-of-metabolic-alterations-and-pd-l1-expression-in-cisplatin-resistant-lung-cancer
#5
M Wangpaichitr, H Kandemir, Y Y Li, C Wu, Djm Nguyen, L G Feun, M T Kuo, N Savaraj
Despite numerous reports on immune checkpoint inhibitor for the treatment of non-small cell lung cancer (NSCLC), the response rate remains low but durable. Thus cisplatin still plays a major role in the treatment of NSCLC. While there are many mechanisms involved in cisplatin resistance, alteration in metabolic phenotypes with elevated levels of reactive oxygen species (ROS) are found in several cisplatin resistant tumors. These resistant cells become more reliant on mitochondria oxidative metabolism instead of glucose...
April 28, 2017: Cell & Developmental Biology
https://www.readbyqxmd.com/read/28817693/clinical-signs-profound-acidemia-hypoglycemia-and-hypernatremia-are-predictive-of-mortality-in-1-400-critically-ill-neonatal-calves-with-diarrhea
#6
Florian M Trefz, Ingrid Lorenz, Annette Lorch, Peter D Constable
Profound acidemia impairs cellular and organ function and consequently should be associated with an increased risk of mortality in critically ill humans and animals. Neonatal diarrhea in calves can result in potentially serious metabolic derangements including profound acidemia due to strong ion (metabolic) acidosis, hyper-D-lactatemia, hyper-L-lactatemia, azotemia, hypoglycemia, hyperkalemia and hyponatremia. The aim of this retrospective study was to assess the prognostic relevance of clinical and laboratory findings in 1,400 critically ill neonatal calves with diarrhea admitted to a veterinary teaching hospital...
2017: PloS One
https://www.readbyqxmd.com/read/28816184/early-screening-of-diabetes-and-hypertension-in-primary-care-dental-clinics-at-king-saud-university-in-riyadh-kingdom-of-saudi-arabia
#7
Emad M Hadlaq, Ziyad T Faraj, Fahad M Al Gamdi, Faisal A Al Obathani, Mashael F Abuabat, Kamran H Awan
INTRODUCTION: Diabetes mellitus and hypertension are the leading chronic diseases in Saudi Arabia; 23.1% of the Saudi population are diabetic and 25.5% are hypertensive. This cross-sectional study was made on dental setting to determine the effectiveness of screening of diabetes and hypertension in dental clinics. MATERIALS AND METHODS: This study was carried out in the primary care dental clinics at the Dental College in King Saud University in Riyadh, Saudi Arabia...
August 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28814665/fatty-acid-oxidation-by-the-osteoblast-is-required-for-normal-bone-acquisition-in-a-sex-and-diet-dependent-manner
#8
Soohyun P Kim, Zhu Li, Meredith L Zoch, Julie L Frey, Caitlyn E Bowman, Priyanka Kushwaha, Kathleen A Ryan, Brian C Goh, Susanna Scafidi, Julie E Pickett, Marie-Claude Faugere, Erin E Kershaw, Daniel L J Thorek, Thomas L Clemens, Michael J Wolfgang, Ryan C Riddle
Postnatal bone formation is influenced by nutritional status and compromised by disturbances in metabolism. The oxidation of dietary lipids represents a critical source of ATP for many cells but has been poorly studied in the skeleton, where the prevailing view is that glucose is the primary energy source. Here, we examined fatty acid uptake by bone and probed the requirement for fatty acid catabolism during bone formation by specifically disrupting the expression of carnitine palmitoyltransferase 2 (Cpt2), an obligate enzyme in fatty acid oxidation, in osteoblasts and osteocytes...
August 17, 2017: JCI Insight
https://www.readbyqxmd.com/read/28811348/a-critical-role-of-glutamine-and-asparagine-%C3%AE-nitrogen-in-nucleotide-biosynthesis-in-cancer-cells-hijacked-by-an-oncogenic-virus
#9
Ying Zhu, Tingting Li, Suzane Ramos da Silva, Jae-Jin Lee, Chun Lu, Hyungjin Eoh, Jae U Jung, Shou-Jiang Gao
While glutamine is a nonessential amino acid that can be synthesized from glucose, some cancer cells primarily depend on glutamine for their growth, proliferation, and survival. Numerous types of cancer also depend on asparagine for cell proliferation. The underlying mechanisms of the glutamine and asparagine requirement in cancer cells in different contexts remain unclear. In this study, we show that the oncogenic virus Kaposi's sarcoma-associated herpesvirus (KSHV) accelerates the glutamine metabolism of glucose-independent proliferation of cancer cells by upregulating the expression of numerous critical enzymes, including glutaminase 2 (GLS2), glutamate dehydrogenase 1 (GLUD1), and glutamic-oxaloacetic transaminase 2 (GOT2), to support cell proliferation...
August 15, 2017: MBio
https://www.readbyqxmd.com/read/28811106/questiomycin-a-stimulates-sorafenib-induced-cell-death-via-suppression-of-glucose-regulated-protein-78
#10
Kayo Machihara, Hidenori Tanaka, Yoshihiro Hayashi, Ichiro Murakami, Takushi Namba
Hepatocellular carcinoma (HCC) is one of the most difficult cancers to treat owing to the lack of effective chemotherapeutic methods. Sorafenib, the first-line and only available treatment for HCC, extends patient overall survival by several months, with a response rate below 10%. Thus, the identification of an agent that enhances the anticancer effect of sorafenib is critical for the development of therapeutic options for HCC. Endoplasmic reticulum (ER) stress response is one of the methods of sorafenib-induced cell death...
August 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28808874/postpartum-glucose-intolerance-an-updated-overview
#11
REVIEW
Ida Pastore, Eusebio Chiefari, Raffaella Vero, Antonio Brunetti
The prevalence of type 2 diabetes mellitus has increased worldwide over the past three decades, as a consequence of the more westernized lifestyle, which is responsible for the increasing obesity rate in the modern adult's life. Concomitant with this increase there has been a gradual rise in the overall prevalence of gestational diabetes mellitus, a condition that strongly predisposes to overt diabetes later in life. Many women with previous gestational diabetes mellitus show glucose intolerance in the early postpartum period...
August 14, 2017: Endocrine
https://www.readbyqxmd.com/read/28808786/inhibition-of-tlr4-alleviates-the-inflammation-and-apoptosis-of-retinal-ganglion-cells-in-high-glucose
#12
Lili Hu, Hongxia Yang, Ming Ai, Shuanghong Jiang
PURPOSE: To investigate the expression profiles of Toll-like receptor 4 (TLR4), the effect of TLR4 on inflammation, and apoptosis of retinal ganglion cells (RGCs) cultured in high glucose and the underlying mechanism. METHODS: A high-glucose model was established in RGCs isolated from Sprague-Dawley (SD) rats (2-3 days old) and identified with Brn3a. Primary cultured RGCs were divided into control (0 mM), HG1 (10 mM glucose), HG2 (20 mM glucose), HG3 (30 mM glucose), HG (20 mM glucose) + TAK-242 (1...
August 14, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28808694/human-serum-albumin-and-oxidative-stress-in-preeclamptic-women-and-the-mechanism-of-albumin-for-stress-reduction
#13
Hiroyuki Kinoshita, Kazushi Watanabe, Toshiharu Azma, Guo-Gang Feng, Takahiko Akahori, Hisaki Hayashi, Motohiko Sato, Yoshihiro Fujiwara, Akihiko Wakatsuki
AIMS: The present study to address one of the mechanisms in preeclampsia, examined whether levels of oxidative stress, human serum albumin, and endothelial function correlate in pregnant women and whether human serum albumin reduces levels of superoxide produced by NADPH oxidase activation in the human vascular smooth muscle cells. MATERIALS AND METHODS: Pregnant women with (Preeclampsia group, n = 33) and without preeclampsia (Normal group, n = 37) were recruited to determine levels of reactive oxygen species (serum diacron-reactive oxygen metabolite [d-ROM]), and the flow-mediated dilation (FMD)...
August 2017: Heliyon
https://www.readbyqxmd.com/read/28808062/ablating-tbc1d1-impairs-contraction-induced-sarcolemmal-glucose-transporter-type-4-redistribution-but-not-insulin-mediated-responses-in-rats
#14
Jamie Whitfield, Sabina Paglialunga, Brennan K Smith, Paula M Miotto, Genevieve Simnett, Holly L Robson, Swati S Jain, Eric A F Herbst, Eric M Desjardins, David J Dyck, Lawrence L Spriet, Gregory R Steinberg, Graham P Holloway
TBC1 domain family member 1 (TBC1D1), a Rab GTPase-activating protein and paralogue of Akt substrate of 160 kDa (AS160), has been implicated in both insulin- and 5-aminoimidazole-4-carboxamide ribonucleotide formyltransferase/IMP cyclohydrolase (AICAR)-mediated glucose transporter type (GLUT4) translocation. However, the role of TBC1D1 in contracting muscle remains ambiguous. We therefore explored the metabolic consequence of ablating TBC1D1 in both resting and contracting skeletal muscles, utilizing a rat TBC1D1-KO model...
August 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28806982/software-guided-versus-nurse-directed-blood-glucose-control-in-critically-ill-patients-the-logic-2-multicenter-randomized-controlled-clinical-trial
#15
Dieter Mesotten, Jasperina Dubois, Tom Van Herpe, Roosmarijn T van Hooijdonk, Ruben Wouters, Domien Coart, Pieter Wouters, Aimé Van Assche, Guy Veraghtert, Bart De Moor, Joost Wauters, Alexander Wilmer, Marcus J Schultz, Greet Van den Berghe
BACKGROUND: Blood glucose control in the intensive care unit (ICU) has the potential to save lives. However, maintaining blood glucose concentrations within a chosen target range is difficult in clinical practice and holds risk of potentially harmful hypoglycemia. Clinically validated computer algorithms to guide insulin dosing by nurses have been advocated for better and safer blood glucose control. METHODS: We conducted an international, multicenter, randomized controlled trial involving 1550 adult, medical and surgical critically ill patients, requiring blood glucose control...
August 14, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28806602/exposure-of-european-sea-bass-dicentrarchus-labrax-to-chemically-dispersed-oil-has-a-chronic-residual-effect-on-hypoxia-tolerance-but-not-aerobic-scope
#16
Yangfan Zhang, Florian Mauduit, Anthony P Farrell, Denis Chabot, Hélène Ollivier, Adrien Rio-Cabello, Stéphane Le Floch, Guy Claireaux
We tested the hypothesis that the chronic residual effects of an acute exposure of European sea bass (Dicentrarchus labrax) to chemically dispersed crude oil is manifest in indices of hypoxic performance rather than aerobic performance. Sea bass were pre-screened with a hypoxia challenge test to establish their incipient lethal oxygen saturation (ILOS), but on discovering a wide breadth for individual ILOS values (2.6-11.0% O2 saturation), fish were subsequently subdivided into either hypoxia sensitive (HS) or hypoxia tolerant (HT) phenotypes, traits that were shown to be experimentally repeatable...
August 1, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28805239/a-comparison-of-gastric-emptying-of-soluble-solid-meals-and-clear-fluids-matched-for-volume-and-energy-content-a-pilot-crossover-study
#17
T Okabe, H Terashima, A Sakamoto
We previously demonstrated that the gastric emptying time of different liquids with the same volume mainly depended on their energy content, regardless of differences in composition. In this crossover study, we investigated whether the same applies when soluble solid foods are ingested with water. Ten healthy volunteers ingested one of five test diets consisting of two test meals (Calorie Mate(®) 100 and 200 kcal) and three test solutions (water and glucose solutions of 100 and 200 kcal), each given in a volume of 400 ml, and then underwent ultrasonography to measure the gastric antral cross-sectional area every 10 min for 120 min...
August 14, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28804621/development-of-gene-polymorphisms-in-meditators-of-nonalcoholic-fatty-liver-disease
#18
Chun Wang, Jianping Gong, Hao Wu
Nonalcoholic fatty liver disease (NAFLD) is the most prevalent liver disease worldwide, the morbidity of which closely correlates with diversity of ethnicity, minority, family and location. Its histology spans from simple steatosis, to nonalcoholic steatohepatitis, which ultimately results in fibrosis, cirrhosis and hepatocellular carcinoma. The accelerating prevalence of NAFLD is due to an incremental incidence of metabolic syndrome that is distinguished by dyslipidemia, glucose impairment, obesity, excessive oxidative stress and adipocytokine impairment...
August 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28804500/pluripotent-stem-cell-metabolism-and-mitochondria-beyond-atp
#19
REVIEW
Jarmon G Lees, David K Gardner, Alexandra J Harvey
Metabolism is central to embryonic stem cell (ESC) pluripotency and differentiation, with distinct profiles apparent under different nutrient milieu, and conditions that maintain alternate cell states. The significance of altered nutrient availability, particularly oxygen, and metabolic pathway activity has been highlighted by extensive studies of their impact on preimplantation embryo development, physiology, and viability. ESC similarly modulate their metabolism in response to altered metabolite levels, with changes in nutrient availability shown to have a lasting impact on derived cell identity through the regulation of the epigenetic landscape...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28801532/activation-of-nkx2-5-calr-p53-signaling-pathway-by-hyperglycemia-induces-cardiac-remodeling-and-dysfunction-in-adult-zebrafish
#20
Sun Yanyi, Wang Qiuyun, Fang Yuehua, Wu Chunfang, Lu Guoping, Chen Zhenyue
Hyperglycemia is an independent risk factor for diabetic cardiomyopathy in humans; however, the underlying mechanisms have not been thoroughly elucidated. Zebrafish (Danio rerio) was used in this study as a novel vertebrate model to explore the signaling pathways of human adult cardiomyopathy. Hyperglycemia was induced by alternately immersing adult zebrafish in a glucose solution or water. The hyperglycemic fish gradually exhibited some hallmarks of cardiomyopathy such as myocardial hypertrophy and apoptosis, myofibril loss, fetal gene reactivation, and severe arrhythmia...
August 11, 2017: Disease Models & Mechanisms
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