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https://www.readbyqxmd.com/read/28102700/aryl-hydrocarbon-receptor-deficient-mice-are-protected-from-high-fat-diet-induced-changes-in-metabolic-rhythms
#1
Cassie Jaeger, Canxin Xu, Mingwei Sun, Stacey Krager, Shelley A Tischkau
High fat diet (HFD) consumption alters the synchronized circadian timing system resulting in harmful loss, gain or shift of transcriptional oscillations. The aryl hydrocarbon receptor (AhR) shares structural homology to clock genes, containing both PAS domains and basic helix-loop helix structural motifs, allowing for interaction with components of the primary circadian feedback loop. Activation of AhR alters circadian rhythmicity, primarily through inhibition of Clock/Bmal1-mediated regulation of Per1. AhR-deficient mice are protected from diet-induced metabolic dysfunction, exhibiting enhanced insulin sensitivity and glucose tolerance...
January 19, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28100752/differential-vulnerability-of-ca1-versus-ca3-pyramidal-neurons-after-ischemia-possible-relationship-to-sources-of-zn2-accumulation-and-its-entry-into-and-prolonged-effects-on-mitochondria
#2
Yuliya V Medvedeva, Sung G Ji, Hong Z Yin, John H Weiss
: Excitotoxic mechanisms contribute to the degeneration of hippocampal pyramidal neurons after recurrent seizures and brain ischemia. However, susceptibility differs, with CA1 neurons degenerating preferentially after global ischemia and CA3 neurons after limbic seizures. Whereas most studies address contributions of excitotoxic Ca(2+) entry, it is apparent that Zn(2+) also contributes, reflecting accumulation in neurons either after synaptic release and entry through postsynaptic channels or upon mobilization from intracellular Zn(2+)-binding proteins such as metallothionein-III (MT-III)...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28100478/adropin-acts-in-the-rat-paraventricular-nucleus-to-influence-neuronal-excitability
#3
Spencer P Loewen, Alastair V Ferguson
Adropin is a peptide hormone with cardiovascular and metabolic roles in the periphery, including effects on glucose and lipid homeostasis. Central administration of adropin has been shown to inhibit water intake in rats, however, the site at which central adropin acts has yet to be elucidated. The hypothalamic paraventricular nucleus (PVN), a critical autonomic control center, plays essential roles in the control of fluid balance, energy homeostasis and cardiovascular regulation, and is therefore a potential target for centrally acting adropin...
January 18, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28100212/the-effects-of-breakfast-on-short-term-cognitive-function-among-chinese-white-collar-workers-protocol-for-a-three-phase-crossover-study
#4
Zhenchuang Tang, Na Zhang, Ailing Liu, Dechun Luan, Yong Zhao, Chao Song, Guansheng Ma
BACKGROUND: As the first meal of the day, breakfast plays an important role in supplying energy and nutrients, which are critical to working and learning activities. A three-phase crossover study was designed to investigate the effects of breakfast on cognitive function among Chinese white-collar workers. The planned study protocol is presented. METHODS: A total of 264 participants aged 25-45 years will be recruited from Shenyang and Chongqing. Self-administered questionnaires will be used to collect information on age, gender, marital status, education level, occupation, smoking habits, drinking habits, and breakfast behaviours...
January 18, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28098809/the-clinical-benefits-and-accuracy-of-continuous-glucose-monitoring-systems-in-critically-ill-patients-a-systematic-scoping-review
#5
REVIEW
Sigrid C J van Steen, Saskia Rijkenberg, Jacqueline Limpens, Peter H J van der Voort, Jeroen Hermanides, J Hans DeVries
Continuous Glucose Monitoring (CGM) systems could improve glycemic control in critically ill patients. We aimed to identify the evidence on the clinical benefits and accuracy of CGM systems in these patients. For this, we performed a systematic search in Ovid MEDLINE, from inception to 26 July 2016. Outcomes were efficacy, accuracy, safety, workload and costs. Our search retrieved 356 articles, of which 37 were included. Randomized controlled trials on efficacy were scarce (n = 5) and show methodological limitations...
January 14, 2017: Sensors
https://www.readbyqxmd.com/read/28098719/regional-gray-matter-volumes-as-related-to-psychomotor-slowing-in-adults-with-type-1-diabetes
#6
Karen A Nunley, Christopher M Ryan, Howard J Aizenstein, Rebecca L MacCloud, Trevor J Orchard, Caterina Rosano
OBJECTIVE: Psychomotor slowing is a common cognitive complication in type 1 diabetes (T1D), but its neuroanatomical correlates and risk factors are unclear. In non-diabetic adults, smaller gray matter volume (GMV) and presence of white matter hyperintensities (WMH) are associated with psychomotor slowing. We hypothesize that smaller GMV in prefronto-parietal regions explains T1D-related psychomotor slowing. We also inspect the contribution of microvascular disease and hyperglycemia. METHODS: GMV, WMH, and glucose levels were measured concurrently with a test of psychomotor speed (Digit Symbol Substitution Test, DSST) in 95 adults with childhood-onset T1D (mean age/duration=49/41 years) and 135 similarly-aged non-T1D adults...
January 17, 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/28098449/targeting-type-2-diabetes-with-c-glucosyl-dihydrochalcones-as-selective-sodium-glucose-co-transporter-2-sglt2-inhibitors-synthesis-and-biological-evaluation
#7
Ana R Jesus, Diogo Vila-Viçosa, Miguel Machuqueiro, Ana P Marques, Timothy M Dore, Amélia P Rauter
Inhibiting glucose reabsorption by sodium glucose co-transporter proteins (SGLTs) in the kidneys is a relatively new strategy for treating type 2 diabetes. Selective inhibition of SGLT2 over SGLT1 is critical for minimizing adverse side effects associated with SGLT1 inhibition. A library of C-glucosyl dihydrochalcones and their dihydrochalcone and chalcone precursors was synthesized and tested as SGLT1/SGLT2 inhibitors using a cell-based fluorescence assay of glucose uptake. The most potent inhibitors of SGLT2 (IC50 = 9-23 nM) were considerably weaker inhibitors of SGLT1 (IC50 = 10-19 μM)...
January 18, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28095700/nanohybrids-consisting-of-magnetic-nanoparticles-and-gold-nanoclusters-as-effective-peroxidase-mimics-and-their-application-for-colorimetric-detection-of-glucose
#8
Seongyeon Cho, Ho Yun Shin, Moon Il Kim
Although protein-stabilized gold nanoclusters (AuNCs) have gathered recent attention as biocompatible peroxidase mimics, their practical utility has been critically limited by the low catalytic activity. Here, the authors have developed a nanohybrid material to significantly enhance the catalytic activity of AuNCs by combining them with other inorganic enzyme mimetics, Fe3O4 magnetic nanoparticles (MNPs), through electrostatic attraction. Owing to the synergistic effect by incorporating AuNCs and MNPs, the constructed nanohybrids yielded highly enhanced catalytic activity and enabled rapid catalytic oxidation of 3,3',5,5'-tetramethylbenzidine substrate to produce a blue-colored solution in proportional to the amount of H2O2...
January 17, 2017: Biointerphases
https://www.readbyqxmd.com/read/28093504/a-model-of-type-2-diabetes-in-the-guinea-pig-using-sequential-diet-induced-glucose-intolerance-and-streptozotocin-treatment
#9
Brendan K Podell, David F Ackart, Michael A Richardson, James E DiLisio, Bruce Pulford, Randall J Basaraba
Type 2 diabetes is a leading cause of morbidity and mortality among non-communicable diseases and additional animal models that more closely replicate the pathogenesis of human type 2 diabetes are needed. The goal of this study was to develop a model of type 2 diabetes in guinea pigs in which diet-induced glucose intolerance precedes β cell cytotoxicity, two processes that are critical to the development of human type 2 diabetes. Guinea pigs developed impaired glucose tolerance after eight weeks of feeding a high fat, high carbohydrate diet, as determined by oral glucose challenge...
January 12, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28093478/long-non-coding-rna-malat1-regulates-cerebrovascular-pathologies-in-ischemic-stroke
#10
Xuejing Zhang, Xuelian Tang, Kai Liu, Milton H Hamblin, Ke-Jie Yin
: The study is designed to determine the role of long non-coding RNA (lncRNA), metastasis associated lung adenocarcinoma transcript 1 (Malat1), in ischemic stroke outcome. Primary mouse brain microvascular endothelial cells (BMECs) were cultured and treated with Malat1 GapmeR prior to 16h oxygen and glucose depravation (OGD). Cell death was assayed by LDH and MTT methods. Malat1 knockout and wildtype mice were subjected to 1h of middle cerebral artery occlusion (MCAO) and 24-72h of reperfusion...
January 16, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28089906/adenosine-signaling-in-diabetes-mellitus-and-associated-cardiovascular-and-renal-complications
#11
REVIEW
Maria Peleli, Mattias Carlstrom
Diabetes mellitus is characterized by abnormal glucose and lipid metabolism, and subsequent hyperglycemia and dyslipidemia, which results from defects in pancreatic beta islets insulin secretion and/or decreased insulin sensitivity in metabolically active organs (i.e. liver, skeletal muscle and adipose tissue). Accumulating evidence highlights a critical role for the adenosine system in the regulation of insulin and glucose homeostasis and the pathophysiology of type 2 diabetes (T2D). Adenosine is a key diverse extracellular signaling molecule that regulates several aspects of tissue function by activating four G-protein-coupled receptors (i...
January 12, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28089568/inhibition-of-intracellular-triglyceride-lipolysis-suppresses-cold-induced-brown-adipose-tissue-metabolism-and-increases-shivering-in-humans
#12
Denis P Blondin, Frédérique Frisch, Serge Phoenix, Brigitte Guérin, Éric E Turcotte, François Haman, Denis Richard, André C Carpentier
Indirect evidence from human studies suggests that brown adipose tissue (BAT) thermogenesis is fueled predominantly by fatty acids hydrolyzed from intracellular triglycerides (TGs). However, no direct experimental evidence to support this assumption currently exists in humans. The aim of this study was to determine the role of intracellular TG in BAT thermogenesis, in cold-exposed men. Using positron emission tomography with (11)C-acetate and (18)F-fluorodeoxyglucose, we showed that oral nicotinic acid (NiAc) administration, an inhibitor of intracellular TG lipolysis, suppressed the cold-induced increase in BAT oxidative metabolism and glucose uptake, despite no difference in BAT blood flow...
January 11, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28089438/a-retrospective-comparison-of-biliopancreatic-diversion-with-duodenal-switch-with-single-anastomosis-duodenal-switch-sips-stomach-intestinal-pylorus-sparing-surgery-at-a-single-institution-with-two-year-follow-up
#13
Amit Surve, Hinali Zaveri, Daniel Cottam, LeGrand Belnap, Austin Cottam, Samuel Cottam
BACKGROUND: The traditional duodenal switch is performed using a Roux-en-Y configuration. This procedure has proven to be the most effective procedure for long-term weight loss and co-morbidity reduction. Recently, stomach intestinal pylorus sparing surgery (SIPS) has been introduced as a simpler and potentially safer variation of the duodenal switch (DS). It is a single anastomosis end-to-side proximal duodeno-ileal bypass with a sleeve gastrectomy. In this study, we compare our outcomes between biliopancreatic diversion with duodenal switch (BPD-DS) and SIPS at 2 years...
December 2, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28079370/substituted-polyesters-by-thiol-ene-modification-rapid-diversification-for-therapeutic-protein-stabilization
#14
Emma M Pelegri-O'Day, Samantha J Paluck, Heather D Maynard
Many proteins, especially those used as therapeutics, are unstable to storage and shipping temperatures, leading to increased costs in research and industry. Therefore, the design and synthesis of novel stabilizers is an important area of investigation. Herein we report new degradable polymers that stabilize proteins to environmental stressors such as refrigeration and elevated temperature. Specifically, polycaprolactones with different pendant groups were synthesized and surveyed for their ability to stabilize an important therapeutic protein to storage and shipping conditions...
January 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28076242/bread-and-butter-of-family-medicine-guidelines-population-screening-diagnostic-evaluations-and-practice-models
#15
EDITORIAL
Dean A Seehusen, Marjorie A Bowman, Anne Victoria Neale
This issue of JABFM is full of evidence and thoughtful articles on topics central to family medicine. These articles critically examine what family physicians do on a daily basis. Reports in this issue provide new evidence regarding guidelines, screening programs, evaluation procedures, and practice models. Clinical articles report that the sensitivity of mailed Fecal Immunochemical Testing changes with the weather; a dermatoscope and a simple algorithm can help differentiate malignant from benign skin lesions; and that a few almonds can alter blood glucose levels in response to a glucose tolerance test...
November 2016: Journal of the American Board of Family Medicine: JABFM
https://www.readbyqxmd.com/read/28072822/point-of-care-versus-central-laboratory-measurements-of-hemoglobin-hematocrit-glucose-bicarbonate-and-electrolytes-a-prospective-observational-study-in-critically-ill-patients
#16
Jérôme Allardet-Servent, Melissa Lebsir, Christian Dubroca, Martine Fabrigoule, Sylvie Jordana, Thomas Signouret, Matthias Castanier, Guillemette Thomas, Rettinavelou Soundaravelou, Anne Lepidi, Laurence Delapierre, Guillaume Penaranda, Philippe Halfon, Jean-Marie Seghboyan
INTRODUCTION: Rapid detection of abnormal biological values using point-of-care (POC) testing allows clinicians to promptly initiate therapy; however, there are concerns regarding the reliability of POC measurements. We investigated the agreement between the latest generation blood gas analyzer and central laboratory measurements of electrolytes, bicarbonate, hemoglobin, hematocrit, and glucose. METHODS: 314 paired samples were collected prospectively from 51 critically ill patients...
2017: PloS One
https://www.readbyqxmd.com/read/28071894/noninvasive-monitoring-of-blood-glucose-with-raman-spectroscopy
#17
Rishikesh Pandey, Santosh Kumar Paidi, Tulio A Valdez, Chi Zhang, Nicolas Spegazzini, Ramachandra Rao Dasari, Ishan Barman
The successful development of a noninvasive blood glucose sensor that can operate reliably over sustained periods of time has been a much sought after but elusive goal in diabetes management. Since diabetes has no well-established cure, control of elevated glucose levels is critical for avoiding severe secondary health complications in multiple organs including the retina, kidney and vasculature. While fingerstick testing continues to be the mainstay of blood glucose detection, advances in electrochemical sensing-based minimally invasive approaches have opened the door for alternate methods that would considerably improve the quality of life for people with diabetes...
January 10, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28070879/a-review-of-pharmacogenetics-of-antimalarials-and-associated-clinical-implications
#18
REVIEW
Hazem Elewa, Kyle John Wilby
Genetic variability in drug-metabolizing enzymes and drug transporters is known to influence the pharmacokinetics of many drugs. Antimalarial drugs are a class of agents known to utilize metabolic and elimination pathways prone to genetic variation. This paper aims to review the genetic variants affecting antimalarial medications and discuss their clinical implications. Data were identified for the genes coding for the cytochrome P450 (CYP) enzymes: CYP2C8, CYP2C19, CYP2A6, CYP2D6, CYP2B6, and the P-glycoprotein drug transporter...
January 9, 2017: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28067472/efficacy-of-basal-bolus-insulin-regimens-in-the-inpatient-management-of-non-critically-ill-patients-with-type-2-diabetes-a-systematic-review-and-meta-analysis
#19
REVIEW
Merete B Christensen, Anders Gotfredsen, Kirsten Nørgaard
BACKGROUND: Hyperglycemia during hospitalization is associated with increased rates of complications and longer hospital stays. Various insulin regimens are used in the inpatient diabetes management of non-critically ill patients. We aimed to assess the efficacy and safety of basal-bolus insulin therapy (BBI) by summarizing evidence from studies of BBI versus sliding scale insulin therapy (SSI) in the management of hospitalized non-critically ill type 2 diabetes patients. METHODS: We searched MEDLINE, EMBASE, Scopus and the Cochrane Library for studies comparing BBI therapy with SSI therapy in hospitalized non-critically ill patients with type 2 diabetes...
January 9, 2017: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/28065828/adipocyte-dynamics-and-reversible-metabolic-syndrome-in-mice-with-an-inducible-adipocyte-specific-deletion-of-the-insulin-receptor
#20
Masaji Sakaguchi, Shiho Fujisaka, Weikang Cai, Jonathon N Winnay, Masahiro Konishi, Brian T O'Neill, Mengyao Li, Rubén García-Martín, Hirokazu Takahashi, Jiang Hu, Rohit N Kulkarni, C Ronald Kahn
Insulin and IGF1 signaling are important for adipose tissue development and function; however, their role in mature adipocytes is unclear. Mice with a tamoxifen-inducible knockout of insulin and/or IGF1 receptors (IR/IGF1R) demonstrate a rapid loss of white and brown fat due to increased lipolysis and adipocyte apoptosis. This results in insulin resistance, glucose intolerance, hepatosteatosis, islet hyperplasia with hyperinsulinemia, and cold intolerance. This phenotype, however, resolves over 10-30 days due to a proliferation of preadipocytes and rapid regeneration of both brown and white adipocytes as identified by mTmG lineage tracing...
January 4, 2017: Cell Metabolism
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