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Stress hyperglycemia

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https://www.readbyqxmd.com/read/29033899/environmental-factors-contribute-to-%C3%AE-cell-endoplasmic-reticulum-stress-and-neo-antigen-formation-in-type-1-diabetes
#1
Meghan L Marré, Jon D Piganelli
Type 1 diabetes (T1D) is an autoimmune disease in which immune-mediated targeting and destruction of insulin-producing pancreatic islet β cells leads to chronic hyperglycemia. There are many β cell proteins that are targeted by autoreactive T cells in their native state. However, recent studies have demonstrated that many β cell proteins are recognized as neo-antigens following posttranslational modification (PTM). Although modified neo-antigens are well-established targets of pathology in other autoimmune diseases, the effects of neo-antigens in T1D progression and the mechanisms by which they are generated are not well understood...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29031207/microrna-25-inhibits-high-glucose-induced-apoptosis-in-renal-tubular-epithelial-cells-via-pten-akt-pathway
#2
Huicong Li, Xiaoguang Zhu, Junwei Zhang, Jun Shi
Diabetic nephropathy (DN) has become the major cause of end-stage renal disease (ESRD). It has been demonstrated that apoptosis of renal tubular epithelial cells induced by hyperglycemia contributes to the pathogenesis of DN. Recent researches have corroborated the critical roles of microRNAs (miRNAs) in the apoptosis of various types of cells including renal tubular epithelial cells. However, the eff ; ;ect of miRNAs on the hyperglycemia-induced apoptosis of renal tubular epithelial cells remains unclear...
October 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29030784/anti-tnf-%C3%AE-antibody-alleviates-insulin-resistance-in-rats-with-sepsis-induced-stress-hyperglycemia
#3
W Qu, C Han, M Li, J Zhang, Z Jiang
PURPOSE: To explore the effects and mechanisms of anti-tumor necrosis factor-α (TNF-α) antibody on insulin resistance (IR) in rats with sepsis-induced stress hyperglycemia. METHODS: The sepsis-induced stress hyperglycemic rat model was constructed by cecal ligation and puncture combined with the intraperitoneal injection of lipopolysaccharide. The rats were randomly divided into six groups: normal control (NC) group, surgical rats (Cntl) group, high-dose anti-TNF-α antibody therapy (TNF, 6 mg/kg) group, low-dose anti-TNF-α antibody therapy (Tnf, 3 mg/kg) group, insulin therapy (INS) group, and INS + Tnf group...
October 13, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29028586/ameliorative-effect-of-borneol-a-natural-bycyclic-monoterpene-against-hyperglycemia-hyperlipidemia-and-oxidative-stress-in-streptozotocin-induced-diabetic-wistar-rats
#4
Madhuri Kodikonda, Prakash Ramachandra Naik
Diabetes mellitus is a major public health problem worldwide. Oxidative stress plays a pivotal role in the pathogenesis of diabetes as it is one of the inevitable outcomes of the cellular process. The present study aims to investigate the putative antihyperglycemic, antihyperlipidemic and antioxidant efficacy of a monoterpene borneol, in comparison with glibenclamide, a standard drug for therapy of diabetes. Diabetes was induced by a single intraperitoneal injection of 40mg/kg body weight. The results of the present study showed a significant increase in the biochemical indices viz...
October 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29025979/the-melatonin-receptor-agonist-piromelatine-ameliorates-impaired-glucose-metabolism-in-chronically-stressed-rats-fed-a-high-fat-diet
#5
Jun Zhou, Deng Wang, Xiaohong Luo, Xu Jia, Maoxing Li, Laudon Moshe, Ruxue Zhang, Zhengping Jia
Modern lifestyle factors (high-caloric food rich in fat) and daily chronic stress are important risk factors for metabolic disturbances. Increased hypothalamic-pituitary-adrenal (HPA) axis activity and the subsequent excess production of glucocorticoids (GCs) in response to chronic stress (CS) leads to increases in metabolic complications, such as type 2 diabetes and insulin resistance (IR). Melatonin (MLT), which protects several regulatory components of the HPA axis from GC-induced deterioration, might improve glucose homeostasis...
October 12, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29022265/exercise-amaliorates-metabolic-disturbances-and-oxidative-stress-in-diabetic-cardiomyopathy-possible-underlying-mechanisms
#6
Ayman M Mahmoud
Cardiomyopathy is a serious complication of diabetes mellitus and occurs independently of coronary artery disease or hypertension. It manifests as systolic/diastolic dysfunction and hypertrophy of the left ventricle and can lead to heart failure. Hyperglycemia can trigger a series of maladaptive stimuli and result in cardiac hypertrophy, fibrosis and reduced performance and contractility. The pathogenesis of diabetic cardiomyopathy is a multifactorial process that includes metabolic derangements such as increased oxidative stress, and altered non-oxidative glucose pathways and lipid metabolism...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29020797/extracellular-superoxide-dismutase-attenuates-renal-oxidative-stress-through-the-activation-of-ampk-in-diabetic-nephropathy
#7
Yu Ah Hong, Ji Hee Lim, Min Young Kim, Yaeni Kim, Hoon Suk Park, Hyung Wook Kim, Bum Soon Choi, Yoon Sik Chang, Hye Won Kim, Tae-Yoon Kim, Cheol Whee Park
AIMS: Oxidative stress plays a crucial role in the pathogenesis of diabetic nephropathy. We evaluated whether extracellular superoxide dismutase (EC-SOD) has a renoprotective effect through activation of AMPK in diabetic kidneys. RESULTS: Human recombinant EC-SOD (hEC-SOD) was administered to 8-week-old male C57BLKS/J db/db mice via subcutaneous injection once a week for 8 weeks. Renal SOD3 expression was suppressed in db/db mice, which was significantly enhanced by hEC-SOD treatment...
October 12, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28993426/effect-of-diabetes-status-and-hyperglycemia-on-global-dna-methylation-and-hydroxymethylation
#8
Jairo Arturo Pinzón-Cortés, Angelina Perna-Chaux, Nicolás Steven Rojas-Villamizar, Angelica Diaz-Basabe, Diana Carolina Polania-Villanueva, María Fernanda Jacome, Carlos Olimpo Mendivil, Helena Groot, Valeriano López-Segura
Type 2 diabetes mellitus (T2DM) is characterized by oxidative stress that could lead to chronic micro- and macro-vascular complications. We hypothesized that some of the target organ damage is mediated by oxidative alterations in epigenetic mechanisms involving DNA methylation (5mC) and DNA hydroxymethylation (5hmC). We analyzed global DNA methylation and hydroxymethylation in peripheral blood cells in well-controlled and poorly controlled patients with type 2 diabetes mellitus and compared them to healthy controls...
October 9, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28989580/luteolin-and-fisetin-suppress-oxidative-stress-by-modulating-sirtuins-and-forkhead-box-o3a-expression-under-in-vitro-diabetic-conditions
#9
Arang Kim, Wooje Lee, Jung-Mi Yun
BACKGROUND/OBJECTIVE: Chronic hyperglycemia induces oxidative stress via accumulation of reactive oxygen species (ROS) and contributes to diabetic complications. Hyperglycemia induces mitochondrial superoxide anion production through the increased activity of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase. This study aimed to determine whether fisetin and luteolin treatments suppress the oxidative stress by modulating the expression of sirtuins (SIRTs) and forkhead box O3a (FOXO3a) under hyperglycemic conditions in human monocytes...
October 2017: Nutrition Research and Practice
https://www.readbyqxmd.com/read/28982613/klotho-protects-the-heart-from-hyperglycemia-induced-injury-by-inactivating-ros-and-nf-%C3%AE%C2%BAb-mediated-inflammation-both-in-vitro-and-in-vivo
#10
Yue Guo, Xiaodong Zhuang, Zena Huang, Jing Zou, Daya Yang, Xun Hu, Zhimin Du, Lichun Wang, Xinxue Liao
Cardiac inflammation and oxidative stress play a key role in the pathogenesis of diabetic cardiomyopathy (DCM). The anti-aging protein Klotho has been found to protect cells from inflammation and oxidative stress. The current study aimed to explore the cardioprotective effects of Klotho on DCM and the underlying mechanisms. H9c2 cells and neonatal cardiomyocytes were incubated with 33mM glucose in the presence or absence of Klotho. Klotho pretreatment effectively inhibited high glucose-induced inflammation, ROS generation, apoptosis, mitochondrial dysfunction, fibrosis and hypertrophy in both H9c2 cells and neonatal cardiomyocytes...
October 2, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28975464/peroxynitrite-induced-tyrosine-nitration-contributes-to-matrix-metalloprotease-3-activation-relevance-to-hyperglycemic-ischemic-brain-injury-and-tissue-plasminogen-activator
#11
Sherif Hafez, Mohammed Abdelsaid, Susan C Fagan, Adviye Ergul
Matrix metalloprotease-3 (MMP3) activation mediates the tissue plasminogen activator (tPA)-induced hemorrhagic transformation after stroke. Hyperglycemia (HG) further exacerbates this outcome. We have recently shown that HG increases MMP3 activity in the brain after stroke. However, the combined HG-tPA effect on MMP3 activation, and the mechanisms through which MMP3 is activated were not previously reported. Accordingly, this study tested the hypothesis that tPA and HG increases MMP3 activity in the brain after stroke through peroxynitrite induced tyrosine nitration...
October 3, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28975077/the-effects-of-dexmedetomidine-administration-on-postoperative-blood-glucose-levels-in-diabetes-mellitus-patients-undergoing-spinal-anesthesia-a-pilot-study
#12
So Hui Yun, Yun Suk Choi
BACKGROUND: Dexmedetomidine (DEX) is an α2-adrenergic receptor agonist with sedative and sympatholytic effects. It inhibits the stress response and insulin secretion. Therefore, postoperative changes to blood glucose levels were investigated when DEX was intraoperatively infused for sedation purposes in diabetic patients under spinal anesthesia. METHODS: Twenty diabetic patients were randomly allocated to two groups (n = 10). Group A patients were infused with DEX at a dose of 0...
December 2016: Anesthesiology and Pain Medicine
https://www.readbyqxmd.com/read/28974008/higher-mortality-in-trauma-patients-is-associated-with-stress-induced-hyperglycemia-but-not-diabetic-hyperglycemia-a-cross-sectional-analysis-based-on-a-propensity-score-matching-approach
#13
Cheng-Shyuan Rau, Shao-Chun Wu, Yi-Chun Chen, Peng-Chen Chien, Hsiao-Yun Hsieh, Pao-Jen Kuo, Ching-Hua Hsieh
Background: Stress-induced hyperglycemia (SIH) is a form of hyperglycemia secondary to stress and commonly occurs in patients with trauma. Trauma patients with SIH have been reported to have an increased risk of mortality. However, information regarding whether these trauma patients with SIH represent a distinct group with differential outcomes when compared to those with diabetic hyperglycemia (DH) remains limited. Methods: Diabetes mellitus (DM) was determined by patient history and/or admission glycated hemoglobin (HbA1c) ≥6...
September 30, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28972154/neutrophil-microparticle-production-and-inflammasome-activation-by-hyperglycemia-due-to-cytoskeletal-instability
#14
Stephen R Thom, Veena M Bhopale, Kevin Yu, Weiliang Huang, Maureen A Kane, David J Margolis
Microparticles (MPs) are lipid bilayerenclosed vesicles produced by cells under oxidative stress. MPs production is elevated in diabetes but the underlying cellular mechanisms are poorly understood. We hypothesized that raising glucose above the physiological level of 5.5 mM would stimulate leukocytes to produce MPs and activate the nucleotide-binding domain, leucine-rich repeat pyrin domain-containing 3 (NLRP3) inflammasome. We found that when incubated in buffer with up to 20 mM glucose, human and murine neutrophils, but not monocytes, generate progressively more MPs with high interleukin (IL)-1β content...
September 25, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28971322/the-diabetic-foot-as-a-proxy-for-cardiovascular-events-and-mortality-review
#15
REVIEW
Isa Dietrich, Gustavo Arruda Braga, Fernanda Gomes de Melo, Ana Carolina Calmon da Costa Silva Silva
PURPOSE OF REVIEW: This article reviewed very recent papers (2016) discussing or bringing clinical evidences of the possible common pathways leading to diabetic foot syndrome (DFS) and increased mortality rates. RECENT FINDINGS: Diabetic patients with diabetic foot syndrome have a mortality rate greater than twofold when compared with non-ulcerated diabetics. In addition, the 5-year mortality rate following amputation is estimated at 39-68%, a life expectancy comparable to aggressive types of cancer or advanced congestive heart failure...
October 2, 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/28966753/short-term-high-dose-of-quercetin-and-resveratrol-alters-aging-markers-in-human-kidney-cells
#16
Fatemeh Abharzanjani, Mohammad Afshar, Mina Hemmati, Maryam Moossavi
BACKGROUND: Hyperglycemia-mediated oxidative stress implicates in etiology of kidney cell aging and diabetic nephropathy. We evaluated the effects of different doses of resveratrol and quercetin and their combination therapy on aging marker in human kidney cell culture under hyperglycemia condition. METHODS: Human embryonic kidney cell (HEK-293) was cultured in Dulbecco's Modified Eagle Medium (DMEM) containing 100 mM (18 mg/L) for 24 h. The cells were treated with resveratrol (2...
2017: International Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28966336/mechanism-of-development-of-atherosclerosis-and-cardiovascular-disease-in-diabetes-mellitus
#17
Naoto Katakami
Diabetic macroangiopathy, atherosclerosis secondary to diabetes mellitus (DM), causes cerebro-cardiovascular diseases, which are major causes of death in patients with DM and significantly reduce their quality of life. The alterations in vascular homeostasis due to endothelial and vascular smooth muscle cell dysfunction are the main features of diabetic macroangiopathy. Although multiple metabolic abnormalities that characterize diabetes are involved in the progression of atherosclerosis in patients with DM, it may be said that prolonged exposure to hyperglycemia and insulin resistance clustering with other risk factors such as obesity, arterial hypertension, and dyslipidemia play crucial roles...
September 29, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28965946/d-allulose-a-stereoisomer-of-d-fructose-extends-caenorhabditis-elegans-lifespan-through-a-dietary-restriction-mechanism-a-new-candidate-dietary-restriction-mimetic
#18
Tomoya Shintani, Hirofumi Sakoguchi, Akihide Yoshihara, Ken Izumori, Masashi Sato
Dietary restriction (DR) is an effective intervention known to increase lifespan in a wide variety of organisms. DR also delays the onset of aging-associated diseases. DR mimetics, compounds that can mimic the effects of DR, have been intensively explored. d-Allulose (d-Alu), the C3-epimer of d-fructose, is a rare sugar that has various health benefits, including anti-hyperglycemia and anti-obesity effects. Here, we report that d-Alu increased the lifespan of Caenorhabditis elegans both under monoxenic and axenic culture conditions...
September 28, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28964868/the-neuroprotective-role-of-rosiglitazone-in-advanced-glycation-end-product-treated-human-neural-stem-cells-is-ppargamma-dependent
#19
Ming-Chang Chiang, Yi-Chuan Cheng, Christopher J Nicol, Chien-Hung Lin
Hyperglycemia is accompanied by an accelerated formation rate of advanced glycation end products (AGEs), which is associated with the pathogenesis of diabetic neuronal deficits. Peroxisome proliferator-activated receptor gamma (PPARγ) belongs to a family of ligand-activated nuclear receptors and its ligands are known to control many physiological, pathological and inflammatory pathways. Weinvestigated the hypothesis that the PPARγ agonist (rosiglitazone) would abrogate AGEs-mediated neurotoxic effects on human neural stem cells (hNSCs), by whichAGEs may play a role in diabetic-related neuronal impairment...
September 28, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28955442/multicystic-dysplastic-kidney-a-new-association-of-wolcott-rallison-syndrome
#20
Asma Deeb, Faisal Al-Zidgali, Bibian N Ofoegbu
Wolcott-Rallison syndrome (WRS) is a rare autosomal recessive disorder due to mutations in the EIF2AK3 gene. It is characterized by permanent neonatal diabetes mellitus, skeletal dysplasia, liver impairment, neutropenia and renal dysfunction. Liver is the most commonly affected organ and liver failure is the commonest cause of death in this syndrome. The EIF2AK3 gene encodes a transmembrane protein PERK, which is important for the cellular response to endoplasmic reticulum (ER) stress. The absence of PERK activity reduces the ER's abilities to deal with stress, leading to cell death by apoptosis...
2017: Endocrinology, Diabetes & Metabolism Case Reports
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