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https://www.readbyqxmd.com/read/28737710/cytoprotective-effect-of-the-ucp2-sirt3-signaling-pathway-by-decreasing-mitochondrial-oxidative-stress-on-cerebral-ischemia-reperfusion-injury
#1
REVIEW
Jing Su, Jie Liu, Xiao-Yu Yan, Yong Zhang, Juan-Juan Zhang, Li-Chao Zhang, Lian-Kun Sun
Recovered blood supply after cerebral ischemia for a certain period of time fails to restore brain function, with more severe dysfunctional problems developing, called cerebral ischemia-reperfusion injury (CIR). CIR involves several extremely complex pathophysiological processes in which the interactions between key factors at various stages have not been fully elucidated. Mitochondrial dysfunction is one of the most important mechanisms of CIR. The mitochondrial deacetylase, sirtuin 3 (SIRT3), can inhibit mitochondrial oxidative stress by deacetylation, to maintain mitochondrial stability...
July 24, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28723637/increasing-ucp2-expression-and-decreasing-nox1-4-expression-maintain-chondrocyte-phenotype-by-reducing-reactive-oxygen-species-production
#2
Yansong Miao, Yuefu Dong, Ping Huang, Xiang Zhao, Zhenyu Huang, Jufang Yao, He Li, Qingrong Xu
The aim of this study is to demonstrate that improving the mitochondrial function can inhibite the loss of chondrocyte phenotype by regulating the expression of uncoupling protein 2(UCP2) and NADPH oxidase1/4(NOX1/4) to reduce the production of reactive oxygen species(ROS). The effects of mitochondrial biogenesis "master regular" peroxisome proliferator-activated receptor gamma coactivator-1α (PGC-1α), mitochondrial transcriptional factor A (TFAM), UCP2, and NOX1/4 on chondrocyte phenotype was examined. It was found that when the chondrocyte phenotype was lost, PGC-1α, UCP2, and TFAM expression decreased, while NOX1/4 expression increased...
July 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28704105/role-of-the-polymorphisms-of-uncoupling-protein-genes-in-childhood-obesity-and-their-association-with-obesity-related-disturbances
#3
Ali Gul, Ömer Ateş, Samet Özer, Tuba Kasap, Emel Ensari, Osman Demir, Ergün Sönmezgöz
BACKGROUND: Obesity, one of the most common disorders observed in clinical practice, has been associated with energy metabolism-related protein genes such as uncoupling proteins (UCPs). Herein, we evaluated UCPs as candidate genes for obesity and its morbidities. METHODS: A total of 268 obese and 185 nonobese children and adolescents were enrolled in this study. To determine dyslipidemia, hypertension, and insulin resistance, laboratory tests were derived from fasting blood samples...
July 13, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28702331/uncoupling-protein-2-regulates-daily-rhythms-of-insulin-secretion-capacity-in-min6-cells-and-isolated-islets-from-male-mice
#4
Nivedita Seshadri, Michael E Jonasson, Kristin L Hunt, Bo Xiang, Steven Cooper, Michael B Wheeler, Vernon W Dolinsky, Christine A Doucette
OBJECTIVE: Upregulation of uncoupling protein 2 (UCP2) is associated with impaired glucose-stimulated insulin secretion (GSIS), which is thought to be an important contributor to pathological β cell failure in obesity and type 2 diabetes (T2D); however, the physiological function of UCP2 in the β cell remains undefined. It has been suggested, but not yet tested, that UCP2 plays a physiological role in β cells by coordinating insulin secretion capacity with anticipated fluctuating nutrient supply, such that upregulation of UCP2 in the inactive/fasted state inhibits GSIS as a mechanism to prevent hypoglycemia...
July 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/28696376/lack-of-additive-effects-of-resveratrol-and-energy-restriction-in-the-treatment-of-hepatic-steatosis-in-rats
#5
Iñaki Milton-Laskibar, Leixuri Aguirre, Alfredo Fernández-Quintela, Anabela P Rolo, João Soeiro Teodoro, Carlos M Palmeira, María P Portillo
The aims of the present study were to analyze the effect of resveratrol on liver steatosis in obese rats, to compare the effects induced by resveratrol and energy restriction and to research potential additive effects. Rats were initially fed a high-fat high-sucrose diet for six weeks and then allocated in four experimental groups fed a standard diet: a control group, a resveratrol-treated group, an energy restricted group and a group submitted to energy restriction and treated with resveratrol. We measured liver triacylglycerols, transaminases, FAS, MTP, CPT1a, CS, COX, SDH and ATP synthase activities, FATP2/FATP5, DGAT2, PPARα, SIRT1, UCP2 protein expressions, ACC and AMPK phosphorylation and PGC1α deacetylation...
July 11, 2017: Nutrients
https://www.readbyqxmd.com/read/28694839/gene-expression-profiling-of-whole-blood-cells-supports-a-more-efficient-mitochondrial-respiration-in-hypoxia-challenged-gilthead-sea-bream-sparus-aurata
#6
Juan Antonio Martos-Sitcha, Azucena Bermejo-Nogales, Josep Alvar Calduch-Giner, Jaume Pérez-Sánchez
BACKGROUND: Acclimation to abiotic challenges, including decreases in O2 availability, requires physiological and anatomical phenotyping to accommodate the organism to the environmental conditions. The retention of a nucleus and functional mitochondria in mature fish red blood cells makes blood a promising tissue to analyse the transcriptome and metabolic responses of hypoxia-challenged fish in an integrative and non-invasive manner. METHODS: Juvenile gilthead sea bream (Sparus aurata) were reared at 20-21 °C under normoxic conditions (> 85% O2 saturation) followed by exposure to a gradual decrease in water O2 concentration to 3...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28693257/ucp2-expression-may-represent-a-predictive-marker-of-neoadjuvant-chemotherapy-effectiveness-for-locally-advanced-uterine-cervical-cancer
#7
Kenji Imai, Takeshi Fukuda, Takuma Wada, Masaru Kawanishi, Reiko Tasaka, Tomoyo Yasui, Toshiyuki Sumi
Concurrent chemoradiotherapy is the standard treatment for locally advanced uterine cervical cancer. However, effective neoadjuvant chemotherapy (NAC) can reduce tumor size and facilitate hysterectomy for locally advanced uterine cervical cancer. NAC treatment could improve the prognosis of patients with locally advanced cervical cancer. However, if NAC is ineffective, radiotherapy must be pursued. This causes a delay in initiating the core treatment and results in a worse prognosis. Therefore, the identification of predictive markers of whether NAC is likely to be effective for the treatment of locally advanced uterine cervical cancer could improve patient prognosis...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28686191/the-gene-lifestyle-interaction-on-leptin-sensitivity-and-lipid-metabolism-in-adults-a-population-based-study
#8
Harry Freitag Luglio, Dian Caturini Sulistyoningrum, Emy Huriyati, Yi Yi Lee, Wan Abdul Manan Wan Muda
BACKGROUND: Obesity has been associated with leptin resistance and this might be caused by genetic factors. The aim of this study was to investigate the gene-lifestyle interaction between -866G/A UCP2 (uncoupling protein 2) gene polymorphism, dietary intake and leptin in a population based study. METHODS: This is a cross sectional study conducted in adults living at urban area of Yogyakarta, Indonesia. Data of adiposity, lifestyle, triglyceride, high density lipoprotein (HDL) cholesterol, leptin and UCP2 gene polymorphism were obtained in 380 men and female adults...
July 7, 2017: Nutrients
https://www.readbyqxmd.com/read/28659758/chronic-oxidative-stress-mitochondrial-dysfunction-nrf2-activation-and-inflammation-in-the-hippocampus-accompany-heightened-systemic-inflammation-and-oxidative-stress-in-an-animal-model-of-gulf-war-illness
#9
Geetha A Shetty, Bharathi Hattiangady, Dinesh Upadhya, Adrian Bates, Sahithi Attaluri, Bing Shuai, Maheedhar Kodali, Ashok K Shetty
Memory and mood dysfunction are the key symptoms of Gulf war illness (GWI), a lingering multi-symptom ailment afflicting >200,000 veterans who served in the Persian Gulf War-1. Research probing the source of the disease has demonstrated that concomitant exposures to anti-nerve gas agent pyridostigmine bromide (PB), pesticides, and war-related stress are among the chief causes of GWI. Indeed, exposures to GWI-related chemicals (GWIR-Cs) and mild stress in animal models cause memory and mood impairments alongside reduced neurogenesis and chronic low-level inflammation in the hippocampus...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28640254/reduced-brain-ucp2-expression-mediated-by-microrna-503-contributes-to-increased-stroke-susceptibility-in-the-high-salt-fed-stroke-prone-spontaneously-hypertensive-rat
#10
Speranza Rubattu, Rosita Stanzione, Franca Bianchi, Maria Cotugno, Maurizio Forte, Floriana Della Ragione, Salvatore Fioriniello, Maurizio D'Esposito, Simona Marchitti, Michele Madonna, Simona Baima, Giorgio Morelli, Sebastiano Sciarretta, Luigi Sironi, Paolo Gelosa, Massimo Volpe
UCP2 maps nearby the lod score peak of STR1-stroke QTL in the SHRSP rat strain. We explored the potential contribution of UCP2 to the high-salt diet (JD)-dependent increased stroke susceptibility of SHRSP. Male SHRSP, SHRSR, two reciprocal SHRSR/SHRSP-STR1/QTL stroke congenic lines received JD for 4 weeks to detect brain UCP2 gene/protein modulation as compared with regular diet (RD). Brains were also analyzed for NF-κB protein expression, oxidative stress level and UCP2-targeted microRNAs expression level...
June 22, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28636007/analysis-of-association-of-gene-variants-with-obesity-traits-in-new-zealand-european-children-at-6-years-of-age
#11
Mohanraj Krishnan, John M D Thompson, Edwin A Mitchell, Rinki Murphy, Lesley M E McCowan, Andrew N Shelling, G On Behalf Of The Children Of Scope Study Group
Childhood obesity is a public health problem, which is associated with a long-term increased risk of cardiovascular disease and premature mortality. Several gene variants have previously been identified that have provided novel insights into biological factors that contribute to the development of obesity. As obesity tracks through childhood into adulthood, identification of the genetic factors for obesity in early life is important. The objective of this study was to identify putative associations between genetic variants and obesity traits in children at 6 years of age...
June 21, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28627196/comparison-of-gene-expression-profile-between-blood-cells-and-white-adipose-tissue-of-patients-with-obesity
#12
Marcela Augusta de Souza Pinhel, Natália Yumi Noronha, Carolina Ferreira Nicoletti, Driele Cristina Gomes Quinhoneiro, Bruno Affonso Parenti Oliveira, Cristiana Cortes-Oliveira, Wilson Salgado-Junior, Wilson Araújo da Silva-Junior, Júlio Sergio Marchini, Dorotéia Rossi Silva Souza, Carla Barbosa Nonino
INTRODUCTION: Gene expression analyses from peripheral blood mononuclear cells (PBMC) and white adipose tissue are conflicting. It seems that results from single tissue are not enough to explain how changes affect humans as a complex biological system. OBJECTIVE: The aim of this study was to compare, from obesity subjects, PBMC and white adipose tissue gene expression that regulates adipogenesis (perilipin 1 [PLIN1], adrenoreceptor beta 3 [ADRB3] and peroxisome proliferator-activated receptor [PPARG2]) and the energy metabolism (uncoupling protein UCP1, UCP2 and UCP3) process...
June 5, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28615046/the-association-of-insertions-deletions-indels-and-variable-number-tandem-repeats-vntrs-with-obesity-and-its-related-traits-and-complications
#13
REVIEW
Yee-How Say
BACKGROUND: Despite the fact that insertions/deletions (INDELs) are the second most common type of genetic variations and variable number tandem repeats (VNTRs) represent a large portion of the human genome, they have received far less attention than single nucleotide polymorphisms (SNPs) and larger forms of structural variation like copy number variations (CNVs), especially in genome-wide association studies (GWAS) of complex diseases like polygenic obesity. This is exemplified by the vast amount of review papers on the role of SNPs and CNVs in obesity, its related traits (like anthropometric measurements, biochemical variables, and eating behavior), and its related complications (like hypertension, hypertriglyceridemia, hypercholesterolemia, and insulin resistance-collectively known as metabolic syndrome)...
June 14, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28582851/fenofibrate-protects-against-acute-myocardial-i-r-injury-in-rat-by-suppressing-mitochondrial-apoptosis-as-decreasing-cleaved-caspase-9-activation
#14
Qing Zhao, Zheng Cui, Yan Zheng, Qun Li, Changyuan Xu, Xueqi Sheng, Mei Tao, HuiXin Xu
BACKGROUND AND AIMS: Peroxisome proliferator-activated receptor-α (PPAR-α) activation has been reported to reduce myocardial ischemia-reperfusion (I/R) injury by inhibiting cell apoptosis. However, the antiapoptotic mechanism of PPAR-α is still unknown. Fenofibrate is a PPAR-α agonist In the present study, we investigate the effects and relevant mechanism of fenofibrate on experimental myocardial ischemia-reperfusion (I/R) injury in rats. METHODS: Adult male Wistar rats were pretreated with fenofibrate (80 mg/kg) daily for a period of 7 days...
July 4, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/28574619/ucp2-upregulation-promotes-plc%C3%AE-1-signaling-during-skin-cell-transformation
#15
Annapoorna Sreedhar, Julia Lefort, Petra Petruska, Xin Gu, Runhua Shi, Sumitra Miriyala, Manikandan Panchatcharam, Yunfeng Zhao
Uncoupling protein 2 (UCP2), whose physiological role is to decrease mitochondrial membrane potential and reactive oxygen species (ROS) production, is often overexpressed in human cancers. UCP2 upregulation has recently been proposed as a novel survival mechanism for cancer cells. However, until now, how exactly UCP2 promotes tumorigenesis remains inconclusive. Based on a widely used skin cell transformation model, our data demonstrated that UCP2 differentially regulated ROS. UCP2 upregulation decreased superoxide whereas it increased hydrogen peroxide production with concomitant increase in the expression and activity of manganese superoxide dismutase (MnSOD), the primary mitochondrial antioxidant enzyme...
June 2, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28572767/glia-maturation-factor-and-mitochondrial-uncoupling-proteins-2-and-4-expression-in-the-temporal-cortex-of-alzheimer-s-disease-brain
#16
Ramasamy Thangavel, Duraisamy Kempuraj, Smita Zaheer, Sudhanshu Raikwar, Mohammad E Ahmed, Govindhasamy Pushpavathi Selvakumar, Shankar S Iyer, Asgar Zaheer
Alzheimer's disease (AD) is characterized by the presence of neuropathological lesions containing amyloid plaques (APs) and neurofibrillary tangles (NFTs). AD is associated with mitochondrial dysfunctions, neuroinflammation and neurodegeneration in the brain. We have previously demonstrated enhanced expression of the proinflammatory protein glia maturation factor (GMF) in glial cells near APs and NFTs in the AD brains. Parahippocampal gyrus consisting of entorhinal and perirhinal subdivisions of temporal cortex is the first brain region affected during AD pathogenesis...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28570676/shaofu-zhuyu-decoction-ameliorates-obesity-mediated-hepatic-steatosis-and-systemic-inflammation-by-regulating-metabolic-pathways
#17
Moonju Hong, Jeeyoun Jung, Hee-Sook Park, So Min Lee, Nam-Joo Jeong, Soon-Hee Kim, Kyoung-Won Lee, Ju-A Lee, Myung-Sunny Kim
Shaofu Zhuyu decoction (SFZYD, also known as Sobokchugeo-tang), a classical prescription drug in traditional East Asian medicine, has been used to treat blood stasis syndrome (BSS). Hepatic steatosis is the result of excess caloric intake, and its pathogenesis involves internal retention of phlegm and dampness, blood stasis, and liver Qi stagnation. To evaluate the effects of treatment with SFZYD on obesity-induced inflammation and hepatic steatosis, we fed male C57BL/6N mice a high fat diet (HFD) for 8 weeks and then treated them with SFZYD by oral gavage for an additional 4 weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28551798/mitochondrial-proton-leak-plays-a-critical-role-in-pathogenesis-of-cardiovascular-diseases
#18
Jiali Cheng, Gayani Nanayakkara, Ying Shao, Ramon Cueto, Luqiao Wang, William Y Yang, Ye Tian, Hong Wang, Xiaofeng Yang
Mitochondrial proton leak is the principal mechanism that incompletely couples substrate oxygen to ATP generation. This chapter briefly addresses the recent progress made in understanding the role of proton leak in the pathogenesis of cardiovascular diseases. Majority of the proton conductance is mediated by uncoupling proteins (UCPs) located in the mitochondrial inner membrane. It is evident that the proton leak and reactive oxygen species (ROS) generated from electron transport chain (ETC) in mitochondria are linked to each other...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28546450/fatty-acid-binding-protein-4-ap2-dependent-blt1r-expression-and-signaling
#19
Ann V Hertzel, Hongliang Xu, Michael Downey, Nicholas Kvalheim, David A Bernlohr
Previous studies have shown that reduced levels of the adipocyte fatty acid binding protein (FABP)4 (AFABP/aP2), result in metabolic improvement including potentiated insulin sensitivity and attenuated atherosclerosis. Mechanistically, pharmacologic or genetic inhibition of FABP4 in macrophages upregulates UCP2, attenuates reactive oxygen species (ROS) production, polarizes cells toward the anti-inflammatory M2 state, and reduces leukotriene (LT) secretion. At the protein level, FABP4 stabilizes LTA4 toward chemical hydrolysis, thereby potentiating inflammatory LTC4 synthesis...
July 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28533128/polyphenol-inhibition-of-benzo-a-pyrene-induced-oxidative-stress-and-neoplastic-transformation-in-an-in%C3%A2-vitro-model-of-carcinogenesis
#20
Kosar Omidian, Hossein Rafiei, Brian Bandy
While dietary polyphenols are widely recognized for cancer-preventing characteristics, the relative effectiveness and mechanisms of action of different polyphenols is not clear. In the present study, we investigated the protective effects of six different polyphenols against benzo[a]pyrene (B[a]P)-induced oxidative stress and neoplastic transformation in the Bhas 42 cell carcinogenesis assay. All of the polyphenols completely prevented the increased intracellular ROS generation by B[a]P at 12 h, and most inhibited after 3 days...
May 19, 2017: Food and Chemical Toxicology
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