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Blood glucose regulation

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https://www.readbyqxmd.com/read/28651670/alterations-in-vitamin-a-retinoic-acid-homeostasis-in-diet-induced-obesity-and-insulin-resistance
#1
Nimesh Mody
Vitamin A is an essential micronutrient for life and the phytochemical β-carotene, also known as pro-vitamin A, is an important dietary source of this vitamin. Vitamin A (retinol) is the parent compound of all bioactive retinoids but it is retinoic acid (RA) that is the active metabolite of vitamin A. The plasma concentration of retinol is maintained in a narrow range and its normal biological activities strictly regulated since excessive intake can lead to toxicity and thus also be detrimental to life. The present review will give an overview of how vitamin A homeostasis is maintained and move on to focus on the link between circulating vitamin A and metabolic disease states...
June 27, 2017: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/28651658/the-impact-of-diet-based-glycaemic-response-and-glucose-regulation-on-cognition-evidence-across-the-lifespan
#2
Sandra I Sünram-Lea, Lauren Owen
The brain has a high metabolic rate and its metabolism is almost entirely restricted to oxidative utilisation of glucose. These factors emphasise the extreme dependence of neural tissue on a stable and adequate supply of glucose. Whereas initially it was thought that only glucose deprivation (i.e. under hypoglycaemic conditions) can affect brain function, it has become apparent that low-level fluctuations in central availability can affect neural and consequently, cognitive performance. In the present paper the impact of diet-based glycaemic response and glucose regulation on cognitive processes across the lifespan will be reviewed...
June 27, 2017: Proceedings of the Nutrition Society
https://www.readbyqxmd.com/read/28646042/on-the-role-il-4-il-13-heteroreceptor-plays-in-regulation-of-type-1-diabetes
#3
Tobechukwu K Ukah, Alexis N Cattin-Roy, Weirong Chen, Mindy M Miller, Subhasis Barik, Habib Zaghouani
Type 1 diabetes (T1D) manifests when the insulin-producing pancreatic β cells are destroyed as a consequence of an inflammatory process initiated by lymphocytes of the immune system. The NOD mouse develops T1D spontaneously and serves as an animal model for human T1D. The IL-4Rα/IL-13Rα1 heteroreceptor (HR) serves both IL-4 and IL-13 cytokines, which are believed to function as anti-inflammatory cytokines in T1D. However, whether the HR provides a responsive element to environmental (i.e., physiologic) IL-4/IL-13 in the regulation of peripheral tolerance and the development of T1D has yet to be defined...
June 23, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28645541/comparison-of-the-effect-by-which-gastric-plication-and-sleeve-gastrectomy-procedures-alter-metabolic-and-physical-parameters-in-an-obese-type-2-diabetes-rodent-model
#4
Min Ye, Renhong Huang, Zhijun Min, Peng Zhang, Tingfeng Wang, Bo Yu
BACKGROUND: Gastric plication (GP) and sleeve gastrectomy (SG) are 2 restrictive bariatric surgeries that are associated with weight loss and health improvement in patients with obesity. However, differences in how these procedures exert their effects have not been systematically evaluated and compared between techniques. OBJECTIVES: To investigate the effectiveness of GP and SG surgeries for obese patients with type 2 diabetes based on evaluation of energy metabolism, hormone metabolism, and gastrointestinal dynamics...
May 11, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28641786/association-of-apolipoprotein-ciii-apoc-iii-endothelium-dependent-vasodilation-and-peripheral-neuropathy-in-a-multi-ethnic-population-with-type-2-diabetes
#5
Sharon Li Ting Pek, Chee Fang Sum, Lee Ying Yeoh, Simon Biing Ming Lee, Wern Ee Tang, Su Chi Lim, Subramaniam Tavintharan
BACKGROUND: Diabetic peripheral neuropathy (DPN) is a common complication of Type 2 diabetes (T2D). Apart from hyperglycemia, its pathogenesis is poorly understood. Apolipoprotein-CIII (apoC-III) associated with triglyceride metabolism, is a risk factor for cardiovascular disease. Its role in DPN is not well-established. We studied the associations of apoC-III, endothelial function and DPN. METHODS: In patients with T2D, anthropometric data, fasting blood, and urine were collected for biochemistry and urine albumin/creatinine measurements (uACR)...
July 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28640445/ubiquitin-ligases-and-posttranslational-regulation-of-energy-in-the-heart-the-hand-that-feeds
#6
David I Brown, Traci L Parry, Monte S Willis
Heart failure (HF) is a costly and deadly syndrome characterized by the reduced capacity of the heart to adequately provide systemic blood flow. Mounting evidence implicates pathological changes in cardiac energy metabolism as a contributing factor in the development of HF. While the main source of fuel in the healthy heart is the oxidation of fatty acids, in the failing heart the less energy efficient glucose and glycogen metabolism are upregulated. The ubiquitin proteasome system plays a key role in regulating metabolism via protein-degradation/regulation of autophagy and regulating metabolism-related transcription and cell signaling processes...
June 18, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28639050/paeoniflorin-suppressed-high-glucose-induced-retinal-microglia-mmp-9-expression-and-inflammatory-response-via-inhibition-of-tlr4-nf-%C3%AE%C2%BAb-pathway-through-upregulation-of-socs3-in-diabetic-retinopathy
#7
Su-Hua Zhu, Bing-Qian Liu, Mao-Juan Hao, Yi-Xin Fan, Cheng Qian, Peng Teng, Xiao-Wei Zhou, Liang Hu, Wen-Tao Liu, Zhi-Lan Yuan, Qing-Ping Li
Diabetic retinopathy (DR) is a serious-threatening complication of diabetes and urgently needed to be treated. Evidence has accumulated indicating that microglia inflammation within the retina plays a critical role in DR. Microglial matrix metalloproteinase 9 (MMP-9) has an important role in the destruction of the integrity of the blood-retinal barrier (BRB) associated with the development of DR. MMP-9 was also considered important for regulating inflammatory responses. Paeoniflorin, a monoterpene glucoside, has a potent immunomodulatory effect on microglia...
June 21, 2017: Inflammation
https://www.readbyqxmd.com/read/28637808/dmt-efficiently-inhibits-hepatic-gluconeogenesis-involving-g%C3%AE-q-signaling-pathway
#8
Ting-Ting Zhou, Fei Ma, Xiao-Fan Shi, Xin Xu, Te Du, Xiao-Dan Guo, Gai-Hong Wang, Liang Yu, Vatcharin Rukachaisirikul, Li-Hong Hu, Jing Chen, Xu Shen
Type 2 diabetes mellitus (T2DM) is a chronic metabolic disease with complicated pathogenesis, and targeting gluconeogenesis inhibition is a promising strategy for anti-diabetic drug discovery. G protein-coupled receptors (GPCRs) are classified as distinct families by heterotrimeric G proteins, primarily including Gαs, Gαi and Gαq. Gαs-coupled GPCRs function potently in the regulation of hepatic gluconeogenesis through activating cyclic adenosine monophosphate (cAMP)/protein kinase A (PKA) pathway, and Gαi-coupled GPCRs exhibit inhibitory effect on adenylyl cyclase and reduce intracellular cAMP level...
June 21, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28631330/foxo-transcription-factors-at-the-interface-of-metabolism-and-cancer
#9
REVIEW
Wolfgang Link, Pablo J Fernandez-Marcos
Diabetes refers to a group of metabolic diseases characterized by impaired insulin signalling and high blood glucose. A growing body of epidemiological evidence links diabetes to several types of cancer but the underlying molecular mechanisms are poorly understood. The signalling cascade connecting insulin and FOXO proteins provides a compelling example for a conserved pathway at the interface between insulin signalling and cancer. FOXOs are transcription factors that orchestrate programs of gene expression known to control a variety of processes in response to cellular stress...
June 19, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28630069/degradation-of-incretins-and-modulation-of-blood-glucose-levels-by-periodontopathic-bacterial-dipeptidyl-peptidase-4
#10
Yuko Ohara-Nemoto, Manami Nakasato, Yu Shimoyama, Tomomi T Baba, Takeshi Kobayakawa, Toshio Ono, Takashi Yaegashi, Shigenobu Kimura, Takayuki K Nemoto
Severe periodontitis is known to aggravate diabetes mellitus, though molecular events related to that link have not been fully elucidated. Porphyromonas gingivalis, a major pathogen of periodontitis, expresses dipeptidyl peptidase 4 (DPP4), which is involved in regulation of blood glucose levels by cleaving incretins in humans. We examined the enzymatic characteristics of DPP4 from P. gingivalis as well as two other periodontopathic bacteria, Tannerella forsythia and Prevotella intermedia, and determined whether it is capable of regulating blood glucose levels...
June 19, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28627632/association-of-single-nucleotide-polymorphisms-in-the-5-upstream-region-of-the-c4bpa-gene-with-essential-hypertension-in-a-northeastern-han-chinese-population
#11
Xueyan Liu, Chao Jiang, Ping Yang
A previous study of the authors using microarray analysis indicated that the expression of complement component 4 binding protein (C4BP)A is upregulated in essential hypertension (EH) patients, but the association between C4BPA variations and EH has not yet been clearly demonstrated. Since the 5' upstream region is known to serve important roles in the gene expression regulation, the present study aimed to identify and analyze the association of single nucleotide polymorphisms (SNPs) in the 5' upstream region between the C4BPA gene with EH in a case‑control study among a northeastern Han Chinese population through direct sequencing as well as genotype detection...
June 9, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28627440/microrna-21-regulates-hepatic-glucose-metabolism-by-targeting-foxo1
#12
Ailing Luo, Haibo Yan, Jichao Liang, Chunyuan Du, Xuemei Zhao, Lijuan Sun, Yong Chen
Abnormal activation of hepatic gluconeogenesis is a major contributor to fasting hyperglycemia in type 2 diabetes; however, the potential role of microRNAs in gluconeogenesis remains unclear. Here, we showed that hepatic expression levels of microRNA-21 (miR-21) were decreased in db/db and high-fat diet (HFD)-induced diabetic mice. Adenovirus-mediated overexpression of miR-21 decreased the expression of phosphoenolpyruvate carboxykinase (PEPCK) and glucose-6-phosphatase (G6Pase) and inhibited glucose production in primary mouse hepatocytes...
June 13, 2017: Gene
https://www.readbyqxmd.com/read/28626942/effect-of-obesity-and-type-2-diabetes-and-glucose-ingestion-on-circulating-spexin-concentration-in-adolescents
#13
S Konnar Hodges, April M Teague, Paul S Dasari, Kevin R Short
Spexin is a novel peptide that has been reported to be down regulated in obese adults and children and in normoglycemic adults following glucose ingestion. Spexin may therefore have a role in metabolic regulation. The purpose of the current study was to determine the effect of obesity and type 2 diabetes (T2DM), and the effect of glucose ingestion on circulating spexin concentration in adolescents. Boys and girls (mean age 16 years old) classified as healthy normal weight (NW, n = 22), obese (Ob, n = 10), or obese with T2DM (n = 12) completed measurements of body composition, blood pressure, cardiorespiratory fitness, and blood concentrations of glucose, insulin, and lipids...
June 19, 2017: Pediatric Diabetes
https://www.readbyqxmd.com/read/28626770/upregulation-of-tumor-necrosis-factor-%C3%AE-induced-protein-8-like-2-mrna-is-negatively-correlated-with-serum-concentrations-of-tumor-necrosis-factor-%C3%AE-and-interleukin-6-in-type-2-diabetes-mellitus
#14
Yongliang Liu, Xinmei Wang, Yan Zhao, Peiqing Zhao, Lianqing Wang, Qiaoli Zhai, Xiaowei Zhang, Wenxiu Tian, Xinxin Xiang, Tao Li
BACKGROUND: Tumor necrosis factor-α-induced protein 8-like 2 (TIPE2 or TNFAIP8L2) is a negative regulator of natural and adaptive immunity. The role of TIPE2 in type 2 diabetes mellitus (T2DM) remains unknown, although TIPE2 plays key roles in preserving inflammatory homeostasis. METHODS: TIPE2 expression was measured by Western blotting and real-time polymerase chain reaction (RT-PCR) in peripheral blood mononuclear cells (PBMCs) isolated from T2DM patients and healthy controls, and tumor necrosis factor-α (TNF-α), high-sensitivity C-reactive protein (hsCRP), interleukin 6 (IL-6), and other related biometabolic parameters were detected using a nephelometer or by ELISA...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28622281/effects-of-baicalin-on-blood-pressure-and-left-ventricular-remodeling-in-rats-with-renovascular-hypertension
#15
Hualei Dai, Xinjin Zhang, Zhigang Yang, Jianmei Li, Jialin Zheng
BACKGROUND This study aimed to explore the effect of baicalin, which is a kind of bioactive flavonoid, on blood pressure and left ventricular remodeling in rats with renovascular hypertension. MATERIAL AND METHODS A total of 40 male Wistar rats were randomly assigned into sham-operation (n=10) and renal hypertension model groups (2-kidney-1 clip; 2K-1C, n=30). The rats in the renal hypertension model group were randomly subdivided into 2K-1C (n=13) and 2K-1C/Baicalin groups (n=14). The cardiac function indexes were determined after 4 weeks...
June 16, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28619994/simultaneous-stimulation-of-glycolysis-and-gluconeogenesis-by-feeding-in-the-anterior-intestine-of-the-omnivorous-gift-tilapia-oreochromis-niloticus
#16
Yong-Jun Chen, Ti-Yin Zhang, Hai-Yan Chen, Shi-Mei Lin, Li Luo, De-Shou Wang
The present study was performed to investigate the roles of anterior intestine in the postprandial glucose homeostasis of the omnivorous Genetically Improved Farmed Tilapia (GIFT). Sub-adult fish (about 173 g) were sampled at 0, 1, 3, 8 and 24 h post feeding (HPF) after 36 h of food deprivation, and the time course of changes in intestinal glucose transport, glycolysis, glycogenesis and gluconeogenesis at the transcription and enzyme activity level, as well as plasma glucose contents, were analyzed. Compared with 0 HPF (fasting for 36 h), the mRNA levels of both ATP-dependent sodium/glucose cotransporter 1 and facilitated glucose transporter 2 increased during 1-3 HPF, decreased at 8 HPF and then leveled off...
June 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28619000/astrocytes-pathology-in-als-a-potential-therapeutic-target
#17
Sonja Johann
The mechanisms underlying neurodegeneration in amyotrophic lateral sclerosis (ALS) are multifactorial and include genetic and environmental factors. Nowadays, it is well accepted that neuronal loss is driven by non-cell autonomous toxicity. Non-neuronal cells, such as astrocytes, have been described to significantly contribute to motoneuron cell death and disease progression in cell culture experiments and animal models of ALS. Astrocytes are essential for neuronal survival and function by regulating neurotransmitter and ion homeostasis, immune response, blood flow and glucose uptake, antioxidant defence and growth factor release...
June 15, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28618839/sphingosine-kinase-and-sphingosine-1-phosphate-in-liver-pathobiology
#18
Timothy Rohrbach, Michael Maceyka, Sarah Spiegel
Over 20 years ago, sphingosine-1-phosphate (S1P) was discovered to be a bioactive signaling molecule. Subsequent studies later identified two related kinases, sphingosine kinase 1 and 2, which are responsible for the phosphorylation of sphingosine to S1P. Many stimuli increase sphingosine kinase activity and S1P production and secretion. Outside the cell, S1P can bind to and activate five S1P-specific G protein-coupled receptors (S1PR1-5) to regulate many important cellular and physiological processes in an autocrine or paracrine manner...
June 15, 2017: Critical Reviews in Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28616923/-effects-of-tramadol-on-insulin-resistance-during-cesarean-section-complicated-with-gestational-diabetes-mellitus
#19
Yuan-Gui Lin, Wei Huang
OBJECTIVES: To investigate the effects of tramadol on insulin resistance (IR) during cesarean section complicated with gestational diabetes mellitus (GDM). METHODS: 120 patients of elective caesarean sectioncomplicated with GDM (level A1) were collected from Dec.2015 to Oct.2016, randomly divided into the tramadol injection treated groups (0.5 mg/kg-TRM1, 1 mg/kg-TRM2 and 1.5 mg/kg-TRM3) and the control group (CON) (n=30). The patients of TRM groups were injected with tramadol after delivery of fetus during caesarean delivery under combined spinal-epidural anaesthesia (CSEA) and the patients of CON group were treated with normal saline as control...
May 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28614667/n-glycosylation-of-asparagine-130-in-the-extracellular-domain-of-the-human-calcitonin-receptor-significantly-increases-peptide-hormone-affinity
#20
Sang-Min Lee, Jason M Booe, Joseph J Gingell, Virginie Sjoelund, Debbie L Hay, Augen A Pioszak
The calcitonin receptor (CTR) is a class B G protein-coupled receptor that is activated by the peptide hormones calcitonin and amylin. Calcitonin regulates bone remodeling through CTR, whereas amylin regulates blood glucose and food intake by activating CTR in complex with receptor activity-modifying proteins (RAMPs). These receptors are targeted clinically for the treatment of osteoporosis and diabetes. Here, we define the role of CTR N-glycosylation in hormone binding using purified calcitonin and amylin receptor extracellular domain (ECD) glycoforms and fluorescence polarization/anisotropy and isothermal titration calorimetry peptide-binding assays...
June 26, 2017: Biochemistry
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