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https://www.readbyqxmd.com/read/28718701/occludin-regulates-glucose-uptake-and-atp-production-in-pericytes-by-influencing-amp-activated-protein-kinase-activity
#1
Victor Castro, Marta Skowronska, Jorge Lombardi, Jane He, Neil Seth, Martina Velichkovska, Michal Toborek
Energetic regulation at the blood-brain barrier is critical for maintaining its integrity, transport capabilities, and brain demands for glucose. However, the underlying mechanisms that regulate these processes are still poorly explored. We recently characterized the protein occludin as a NADH oxidase and demonstrated its influence on the expression and activation of the histone deacetylase SIRT-1. Because SIRT-1 works in concert with AMP-activated protein kinase (AMPK) (AMPK), we investigated the impact of occludin on this metabolic switch...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28716950/analysis-of-small-critical-regions-of-swi1-conferring-prion-formation-maintenance-and-transmission
#2
Stephanie Valtierra, Zhiqiang Du, Liming Li
Saccharomyces cerevisiae contains several prion elements, which are epigenetically transmitted as self-perpetuating protein conformations. One such prion is [SWI(+) ], whose protein determinant is Swi1, a subunit of the SWI/SNF chromatin-remodeling complex. We previously reported that [SWI(+) ] formation results in a partial loss-of-function phenotype of poor growth in non-glucose media and abolishment of multicellularity. We also showed that the first 38 amino acids of Swi1 propagated [SWI(+)]. We show here that a region as small as the first 32 amino acids of Swi1 (Swi11-32) can decorate [SWI(+)] aggregation and stably maintain and transmit [SWI(+)] independently of full-length Swi1...
July 17, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28714516/-epigallocatechin-3-gallate-attenuates-myocardial-injury-induced-by-ischemia-reperfusion-in-diabetic-rats-and-in-h9c2-cells-under-hyperglycemic-conditions
#3
Yang Wu, Zhong-Yuan Xia, Bo Zhao, Yan Leng, Juan Dou, Qing-Tao Meng, Shao-Qing Lei, Zhi-Ze Chen, Jie Zhu
(-)-Epigallocatechin gallate (EGCG) exerts multiple beneficial effects on cardiovascular performance. In this study, we aimed to examine the effects of EGCG on diabetic cardiomyopathy during myocardial ischemia/reperfusion (I/R) injury. EGCG (100 mg/kg/day) was administered at week 6 for 2 weeks to diabetic rats following the induction of type 1 diabetes by streptozotocin (STZ). At the end of week 8, the animals were subjected to myocardial I/R injury. The EGCG-elicited structural and functional effects were analyzed...
August 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28712655/insulin-regulation-of-proteostasis-and-clinical-implications
#4
REVIEW
Haleigh A James, Brian T O'Neill, K Sreekumaran Nair
Maintenance and modification of the cellular proteome are at the core of normal cellular physiology. Although insulin is well known for its control of glucose homeostasis, its critical role in maintaining proteome homeostasis (proteostasis) is less appreciated. Insulin signaling regulates protein synthesis and degradation as well as posttranslational modifications at the tissue level and coordinates proteostasis at the organism level. Here, we review regulation of proteostasis by insulin in postabsorptive, postprandial, and diabetic states...
July 10, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28711933/dysregulated-expression-of-proteins-associated-with-er-stress-autophagy-and-apoptosis-in-tissues-from-nonalcoholic-fatty-liver-disease
#5
Seungwoo Lee, Soohee Kim, Seungwoo Hwang, Nathan J Cherrington, Doug-Young Ryu
Nonalcoholic fatty liver disease (NAFLD) is categorized into nonalcoholic fatty liver (NAFL) and nonalcoholic steatohepatitis (NASH) and has emerged as a risk factor for more critical clinical conditions. However, the underlying mechanisms of NAFLD pathogenesis are not fully understood. In this study, expression of proteins associated with endoplasmic reticulum (ER) stress, apoptosis and autophagy were analyzed in normal, NAFL and NASH human livers by western blotting. Levels of some ER stress-transducing transcription factors, including cleaved activating transcription factor 6, were higher in NASH than in the normal tissues...
June 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28710262/med15b-regulates-acid-stress-response-and-tolerance-in-candida-glabrata
#6
Yanli Qi, Hui Liu, Jiayin Yu, Xiulai Chen, Liming Liu
Candida glabrata is a promising producer of organic acids. To elucidate the physiological function of the Mediator tail subunit Med15B in the response to low pH stress, we constructed a deletion strain, med15BΔ, and overexpression strain, HTUΔ/CgMED15B Deletion of MED15B caused biomass production, glucose consumption rate, and cell viability to decrease by 28.3%, 31.7%, and 26.5%, respectively, compared with those of the parent strain (HTUΔ) at pH 2.0. Expression of lipid metabolism-related genes was significantly downregulated in the med15BΔ strain, whereas key genes of ergosterol biosynthesis showed abnormal upregulation...
July 14, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28710148/energy-protein-carbohydrate-and-lipid-intakes-and-their-effects-on-morbidity-and-mortality-in-critically-ill-adult-patients-a-systematic-review
#7
REVIEW
Anna Patkova, Vera Joskova, Eduard Havel, Miroslav Kovarik, Monika Kucharova, Zdenek Zadak, Miloslav Hronek
The guidelines for nutritional support in critically ill adult patients differ in various aspects. The optimal amount of energy and nutritional substrates supplied is important for reducing morbidity and mortality, but unfortunately this is not well known, because the topic is complex and every patient is individual. The aim of this review was to gather recent pertinent information concerning the nutritional support of critically ill patients in the intensive care unit (ICU) with respect to the energy, protein, carbohydrate, and lipid intakes and the effect of their specific utilization on morbidity and mortality...
July 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28708678/dysglycemia-glycemic-variability-and-outcome-after-cardiac-arrest-and-temperature-management-at-33%C3%A2-c-and-36%C3%A2-c
#8
Ola Borgquist, Matt P Wise, Niklas Nielsen, Nawaf Al-Subaie, Julius Cranshaw, Tobias Cronberg, Guy Glover, Christian Hassager, Jesper Kjaergaard, Michael Kuiper, Ondrej Smid, Andrew Walden, Hans Friberg
OBJECTIVES: Dysglycemia and glycemic variability are associated with poor outcomes in critically ill patients. Targeted temperature management alters blood glucose homeostasis. We investigated the association between blood glucose concentrations and glycemic variability and the neurologic outcomes of patients randomized to targeted temperature management at 33°C or 36°C after cardiac arrest. DESIGN: Post hoc analysis of the multicenter TTM-trial. Primary outcome of this analysis was neurologic outcome after 6 months, referred to as "Cerebral Performance Category...
August 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28708516/peroxisome-proliferator-activated-receptor-ppar-isoforms-are-differentially-expressed-in-peri-implantation-porcine-conceptuses
#9
Agnieszka Blitek, Magdalena Szymanska
Peroxisome proliferator-activated receptors (PPARs) are members of the nuclear receptor family of ligand-dependent transcription factors. PPARs are critical regulators of glucose homeostasis and lipid metabolism, and affect cell proliferation and differentiation. In the current study, we examined (1) the profiles of PPARA, PPARD, and PPARG mRNA expression and DNA binding activity in porcine conceptuses collected on Days 10-11 (spherical and tubular conceptuses), 11-12 (filamentous conceptuses), 13-14, and 15-16 (elongated conceptuses) of pregnancy, (2) the presence of PPARA, PPARD, and PPARG proteins in Days 10, 12, and 15 conceptuses...
June 13, 2017: Theriogenology
https://www.readbyqxmd.com/read/28708507/effects-of-diluents-and-plasma-on-honey-bee-apis-mellifera-l-drone-frozen-thawed-semen-fertility
#10
REVIEW
Aziz Gül, Nuray Şahinler, Ali G Onal, Brandon K Hopkins, Walter S Sheppard
Cryopreservation is an advanced method used to protect germplasm in liquid nitrogen. Honey bees are of special interest to protect because of their pollination activity and critical role in agriculture. There has been important progress in the cryopreservation of honey bee germplasm in recent years, leading to practical recovery of genetic material for breeding purposes following freezing. However, there remains room for improvement and the goal of the present study was to evaluate the effect of different "extenders" added post-thaw on the fertilization rate of cryopreserved honey bee semen...
June 23, 2017: Theriogenology
https://www.readbyqxmd.com/read/28707079/down-regulation-of-mir-23a-inhibits-high-glucose-induced-emt-and-renal-fibrogenesis-by-up-regulation-of-snon
#11
Haiping Xu, Fuyun Sun, Xiuli Li, Lina Sun
It has been reported that transforming growth factor-β1 (TGF-β1) signaling plays an important role in the development of diabetic nephropathy (DN). The nuclear transcription co-repressor Ski-related novel protein N (SnoN) is a critical negative regulator of TGF-β1/Smad signal pathway, involving in tubule epithelial-mesenchymal transition (EMT), extracellular matrix (ECM) accumulation, and tubulointerstitial fibrosis. In this study, we focused on miR-23a as a regulator of SnoN. Our purpose is to study the effects of miR-23a on high glucose (HG)-induced EMT process and ECM deposition in HK2 cells...
July 13, 2017: Human Cell
https://www.readbyqxmd.com/read/28706281/thiamine-metabolism-is-critical-for-regulating-correlated-growth-of-dendrite-arbors-and-neuronal-somata
#12
Huimin Liu, Shaoming Sang, Yuan Lu, Zhongfeng Wang, Xiang Yu, Chunjiu Zhong
Thiamine is critical for cellular function, as its phosphorylated and active form, thiamine diphosphate (TDP), acts as coenzyme for three key enzymes in glucose metabolism. Mutations in thiamine transporter, TDP synthesizing enzyme or carrier, including solute carrier family 19 member 3 (SLC19A3), thiamine pyrophosphokinase (TPK1) and solute carrier family 25 member 19 (SLC25A19), have been associated with developmental neurological disorders, including microcephaly and Leigh syndrome. However, little is known about how thiamine metabolism regulates neuronal morphology at the cellular level...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28706006/integration-of-flux-measurements-to-resolve-changes-in-anabolic-and-catabolic-metabolism-in-cardiac-myocytes
#13
Andrew A Gibb, Pawel K Lorkiewicz, Yu-Ting Zheng, Xiang Zhang, Aruni Bhatnagar, Steven P Jones, Bradford G Hill
Although ancillary pathways of glucose metabolism are critical for synthesizing cellular building blocks and modulating stress responses, how they are regulated remains unclear.  In this study, we used radiometric glycolysis assays, [(13)C6]-glucose isotope tracing, and extracellular flux analysis to understand how phosphofructokinase (PFK)-mediated changes in glycolysis regulate glucose carbon partitioning into catabolic and anabolic pathways. Expression of kinase-deficient or phosphatase-deficient 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase in rat neonatal cardiomyocytes coordinately regulated glycolytic rate and lactate production...
July 13, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28705835/transendothelial-movement-of-adiponectin-is-restricted-by-glucocorticoids
#14
Thanh Q Dang, Nanyoung Yoon, Helen Chasiotis, Emily C Dunford, Qilong Feng, Pingnian He, Michael C Riddell, Scott P Kelly, Gary Sweeney
Altered permeability of the endothelial barrier in a variety of tissues has implications both in disease pathogenesis and treatment. Glucocorticoids are potent mediators of endothelial permeability, and this forms the basis for their heavily prescribed use as medications to treat ocular disease. However, the effect of glucocorticoids on endothelial barriers elsewhere in the body is less well studied. Here, we investigated glucocorticoid-mediated changes in endothelial flux of Adiponectin (Ad), a hormone with a critical role in diabetes...
August 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28702322/mitochondrial-transcription-factor-b2-is-essential-for-mitochondrial-and-cellular-function-in-pancreatic-%C3%AE-cells
#15
Lisa M Nicholas, Bérengère Valtat, Anya Medina, Lotta Andersson, Mia Abels, Inês G Mollet, Deepak Jain, Lena Eliasson, Nils Wierup, Malin Fex, Hindrik Mulder
OBJECTIVE: Insulin release from pancreatic β-cells is controlled by plasma glucose levels via mitochondrial fuel metabolism. Therefore, insulin secretion is critically dependent on mitochondrial DNA (mtDNA) and the genes it encodes. Mitochondrial transcription factor B2 (TFB2M) controls transcription of mitochondrial-encoded genes. However, its precise role in mitochondrial metabolism in pancreatic β-cells and, consequently, in insulin secretion remains unknown. METHODS: To elucidate the role of TFB2M in mitochondrial function and insulin secretion in vitro and in vivo, mice with a β-cell specific homozygous or heterozygous knockout of Tfb2m and rat clonal insulin-producing cells in which the gene was silenced were examined with an array of metabolic and functional assays...
July 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28701752/suppression-of-vamp2-alters-morphology-of-the-tegument-and-affects-glucose-uptake-development-and-reproduction-of-schistosoma-japonicum
#16
Qian Han, Bingguang Jia, Yang Hong, Xiaodan Cao, Qi Zhai, Ke Lu, Hao Li, Chuangang Zhu, Zhiqiang Fu, Yonghong Shi, Jiaojiao Lin
Schistosomiasis caused by schsitosomes is a serious global public health concern. The tegument that surrounds the worm is critical to the schistosomes survival. The tegument apical membrane undergoes a continuous process of rupture and repair owing to membranous vacuoles fusing with the plasma membrane. Vesicle-associated membrane protein 2 (VAMP2), a member of soluble N-ethylmaleimide sensitive factor attachment protein receptor (SNAREs) is required for membrane fusion. Here, we used RNA interference (RNAi) to knock down the expression of VAMP2 of Schistosoma japonicum (SjVAMP2), and both real-time PCR and western blot analysis confirmed the suppression of this molecule, as well as the suppression of the transcript levels of schistosome glucose transporters (SGTP1 and SGTP4), and insulin receptors (SjIR1 and SjIR2)...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28701081/gut-microbiota-dysbiosis-associated-with-glucose-metabolism-disorders-and-the-metabolic-syndrome-in-older-adults
#17
K Lippert, L Kedenko, L Antonielli, I Kedenko, C Gemeier, M Leitner, A Kautzky-Willer, B Paulweber, E Hackl
Obesity and associated metabolic disorders have become highly prevalent diseases worldwide, and the human gut microbiota, due to its influence on host energy metabolism, has been attributed an important role therein. This pilot study explores host-microbiota relationships in men and women affected by various types of glucose metabolism disorder. Among 20 individuals aged 58 to 71 years with either normal glucose tolerance, prediabetes, or type 2 diabetes mellitus the gut bacterial communities were compared based on barcoded 454 sequencing of 16S rRNA genes amplified from stool samples...
July 13, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28699359/mitochondrial-uptake-and-accumulation-of-vitamin-c-what-can-we-learn-from-cell-cultures-studies
#18
Orazio Cantoni, Andrea Guidarelli, Mara Fiorani
SIGNIFICANCE: The mitochondrial fraction of L-ascorbic acid (AA) is of critical importance for the regulation of the redox status of these organelles and for cell survival. Recent Advances: Most cell types take up AA by high affinity sodium-dependent vitamin C transporter 2 (SVCT2), sensitive to inhibition by dehydroascorbic acid (DHA). DHA can also be taken up by glucose transporters (GLUTs) and then reduced back to AA. DHA concentrations, normally very low in biological fluids, may only become significant next to superoxide releasing cells...
July 12, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28698830/prevalence-and-predictors-of-home-use-of-glucometers-in-diabetic-patients
#19
Syed A Farhan, Ali T Shaikh, Maria Zia, Bilal R Kahara, Ramsha Muneer, Muzna Rehman, Ayesha Mubashir, Hassaan Sadiq, Durr-E-Amna Siddiqui, Syed M Haseeb, Hafsa Tanveer, Khadijah Siddiq, Saib B Mujtaba, Samir A Mirza, Hira Feroz, Kaneez Fatima
BACKGROUND: Self-monitoring of blood glucose (SMBG) is a critical component of diabetes care. However, it has been shown that use of glucometers in developing countries such as Pakistan is limited. The aim of this study was to determine the frequency of glucometer usage in the urban diabetic population of Karachi and to identify variables that influenced the likelihood of practice of SMBG. METHODS: A cross-sectional study was conducted among 567 adult diabetic patients selected at random from the out-patient departments of multiple healthcare institutions in Karachi categorized into two settings; Government and Private...
June 10, 2017: Curēus
https://www.readbyqxmd.com/read/28697259/behavioral-counseling-to-promote-a-healthful-diet-and-physical-activity-for-cardiovascular-disease-prevention-in-adults-without-known-cardiovascular-disease-risk-factors-updated-evidence-report-and-systematic-review-for-the-us-preventive-services-task-force
#20
Carrie D Patnode, Corrine V Evans, Caitlyn A Senger, Nadia Redmond, Jennifer S Lin
Importance: Unhealthful dietary patterns, low levels of physical activity, and high sedentary time increase the risk of cardiovascular disease. Objective: To systematically review the evidence on the benefits and harms of behavioral counseling for the primary prevention of cardiovascular disease in adults without known cardiovascular risk factors to inform the US Preventive Services Task Force. Data Sources: MEDLINE, PubMed, Cochrane Central Register of Controlled Trials, and PsycINFO for studies published in the English language between January 1, 2013, and May 25, 2016, and ongoing surveillance in targeted publications through March 24, 2017...
July 11, 2017: JAMA: the Journal of the American Medical Association
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