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https://www.readbyqxmd.com/read/28933062/hypothalamic-dysfunction-in-obesity-and-metabolic-disorders
#1
Sara Carmo-Silva, Cláudia Cavadas
The hypothalamus is the brain region responsible for the maintenance of energetic homeostasis. The regulation of this process arises from the ability of the hypothalamus to orchestrate complex physiological responses such as food intake and energy expenditure, circadian rhythm, stress response, and fertility. Metabolic alterations such as obesity can compromise these hypothalamic regulatory functions. Alterations in circadian rhythm, stress response, and fertility further contribute to aggravate the metabolic dysfunction of obesity and contribute to the development of chronic disorders such as depression and infertility...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28928277/jnk-activation-of-bim-promotes-hepatic-oxidative-stress-steatosis-and-insulin-resistance-in-obesity
#2
Sara A Litwak, Lokman Pang, Sandra Galic, Mariana Igoillo-Esteve, William J Stanley, Jean-Valery Turatsinze, Kim Loh, Helen E Thomas, Arpeeta Sharma, Eric Trepo, Christophe Moreno, Daniel J Gough, Decio L Eizirik, Judy B de Haan, Esteban N Gurzov
The BCL-2 family are crucial regulators of the mitochondrial pathway of apoptosis in normal physiology and disease. Besides their role in cell death, BCL-2 proteins have been implicated in the regulation of mitochondrial oxidative phosphorylation and cellular metabolism. It remains unclear, however, whether these proteins have a physiological role in glucose homeostasis and metabolism in vivo Here we report that fat accumulation in the liver increases JNK-dependent BIM expression in hepatocytes. To determine the consequences of hepatic BIM deficiency in diet-induced obesity, we generated liver-specific BIM knockout (BLKO) mice...
September 19, 2017: Diabetes
https://www.readbyqxmd.com/read/28928235/testosterone-protects-high-fat-low-carbohydrate-diet-induced-non-alcoholic-fatty-liver-disease-in-castrated-male-rats-mainly-via-modulating-er-stress
#3
Yue Jia, Jennifer Kuang Yee, Christina Wang, Liana Nikolaenko, Maruja Diaz-Arjonilla, Joshua N Cohen, Samuel W French, Peter Y Liu, YanHe Lue, Wai-Nang Paul Lee, Ronald S Swerdloff
We previously showed that testosterone (T) deficiency enhanced high-fat diet (HFD) induced hepatic steatosis in rats that was independent of insulin resistance, and that T replacement reduced hepatic macrovesicular fat accumulation and inflammation. The present report explores the mechanism of T-protective effects on HFD-induced steatohepatitis. Adult male rats were randomized into four treatment groups for 15 weeks (intact rats on regular chow diet or HFD, and castrated rats on HFD with/without T replacement)...
September 19, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28927270/proteomic-analysis-of-peripheral-blood-mononuclear-cells-pbmc-after-a-high-fat-high-carbohydrate-meal-with-orange-juice
#4
Daniela F Seixas Chaves, Paulo C Carvalho, Elisa Brasili, Marcelo Macedo Rogero, Neuza Mariko Aymoto Hassimotto, Jolene K Diedrich, James J Moresco, John R Yates, Franco Maria Lajolo
Oxidative stress and inflammation play a role in the physiopathology of insulin resistance, diabetes and cardiovascular disease. A single high-fat, high-carbohydrate (HFHC) meal induces an increase in inflammatory and oxidative stress markers in peripheral blood mononuclear cells (PBMC). Previous studies have shown that orange juice is able to prevent this response by inhibiting toll like receptors (TLR) expression and endotoxemia. Our goal was to study the proteome response in PBMC after the consumption of a HFHC meal consumed with water, orange juice or an isocaloric beverage (water with glucose)...
September 19, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28926842/pharmacotherapy-with-thymoquinone-improved-pancreatic-%C3%AE-cell-integrity-and-functional-activity-enhanced-islets-revascularization-and-alleviated-metabolic-and-hepato-renal-disturbances-in-streptozotocin-induced-diabetes-in-rats
#5
Adel Galal El-Shemi, Osama Adnan Kensara, Aiman Alsaegh, Mohammed Hasan Mukhtar
AIMS: This study is aimed at evaluating the antidiabetic effects of thymoquinone (TQ) on streptozotocin (STZ)-induced diabetes in rats, and exploring the possible underlying mechanisms. METHODS: Diabetes was induced in adult male Wistar rats by intraperitoneal injection of freshly prepared STZ (65 mg/kg). After disease induction, 42 rats were equally assigned to: controls, STZ-diabetic group, and STZ-diabetic group treated with oral TQ (35 mg/kg/day) for 5 weeks...
September 20, 2017: Pharmacology
https://www.readbyqxmd.com/read/28926063/methylglyoxal-attenuates-insulin-signaling-and-downregulates-the-enzymes-involved-in-cholesterol-biosynthesis
#6
Arati B Deshmukh, Shakuntala Bai, Aarthy T, Rubina S Kazi, Reema Banarjee, Rajeshwari Rathore, Vijayakumar Mv, Thulasiram Hv, Manoj Kumar Bhat, Kulkarni Mj
Methylglyoxal (MG) is a highly reactive dicarbonyl known to be elevated under the hyperglycemic conditions of diabetes and is implicated in the development of diabetic complications. Therefore, the current study investigates the role of MG in exacerbating insulin resistance at the insulin signaling level, as well as its effect on the global proteomic level. By using insulin sensitive rat muscle cells (L6) and Chinese hamster ovary (CHO) cells stably expressing the insulin receptor (IR) and a glucose transporter fused with green fluorescent protein (GLUT4-GFP), we have observed that MG impairs insulin signaling, inhibits GLUT4 translocation and reduces glucose uptake...
September 19, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28923478/reduction-of-non-enzymatic-antioxidants-in-plasma-during-ecmo-treatment-in-ards-by-influence-a-h1n1
#7
Marco Ciapetti, Paola Mancinelli, Andrea Cecchi, Emma Borrelli, Velio Bocci, Adriano Peris
PURPOSE: In critically ill patient it is observed a severe oxidative stress, not only due to the acute pathology but also for some therapeutic treatments. The aim of the present study was to analyze the variations of non-enzymatic antioxidants in plasma during veno-venous ECMO-treatment in a homogeneous population of critical patients with ARDS. MATERIALS AND METHODS: We carried out a retrospective study enrolling all patients with ARDS by influence A H1N1 treated with veno-venous ECMO...
August 8, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28912356/biomarkers-of-disease-can-be-detected-in-mice-as-early-as-4-weeks-after-initiation-of-exposure-to-third-hand-smoke-levels-equivalent-to-those-found-in-homes-of-smokers
#8
Neema Adhami, Yuxin Chen, Manuela Martins-Green
Third-hand smoke (THS) is a newly discovered environmental health hazard that results from accumulation and aging of second-hand smoke (SHS) toxins on surfaces where smoking has occurred. Our objective was to determine whether there is a time-dependent effect of THS exposure on health. Using an in vivo exposure mouse system that mimics exposure of humans to THS, we investigated its effects on biomarkers found in serum, and in liver and brain tissues. Mice were exposed to THS for 1, 2, 4, or 6 months and brain, liver, and serum were collected...
October 1, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28911613/proteomic-changes-associated-with-metabolic-syndrome-in-a-fructose-fed-rat-model
#9
Cheng-Chu Hsieh, Chen-Chung Liao, Yi-Chun Liao, Lucy Sun Hwang, Liang-Yi Wu, Shu-Chen Hsieh
Metabolic syndrome (MetS), characterized by a constellation of disorders such as hyperglycemia, insulin resistance, and hypertension, is becoming a major global public health problem. Fructose consumption has increased dramatically over the past several decades and with it the incidence of MetS. However, its molecular mechanisms remain to be explored. In this study, we used male Sprague-Dawley (SD) rats to study the pathological mechanism of fructose induced MetS. The SD rats were fed a 60% high-fructose diet for 16 weeks to induce MetS...
October 2016: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911168/developmental-programming-impact-of-gestational-steroid-and-metabolic-milieus-on-mediators-of-insulin-sensitivity-in-prenatal-testosterone-treated-female-sheep
#10
Muraly Puttabyatappa, Victoria Andriessen, Makeda Mesquitta, Lixia Zeng, Subramaniam Pennathur, Vasantha Padmanabhan
Prenatal testosterone (T) excess in sheep leads to peripheral insulin resistance (IR), reduced adipocyte size, and tissue-specific changes, with liver and muscle but not adipose tissue being insulin resistant. To determine the basis for the tissue-specific differences in insulin sensitivity, we assessed changes in negative (inflammation, oxidative stress, and lipotoxicity) and positive mediators (adiponectin and antioxidants) of insulin sensitivity in the liver, muscle, and adipose tissues of control and prenatal T-treated sheep...
September 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28904866/imm-h007-a-new-therapeutic-candidate-for-nonalcoholic-fatty-liver-disease-improves-hepatic-steatosis-in-hamsters-fed-a-high-fat-diet
#11
Huijie Shi, Qingchun Wang, Liu Yang, Shouxia Xie, Haibo Zhu
Nonalcoholic fatty liver disease (NAFLD), the most common chronic liver disease in humans, is characterized by the accumulation of triacylglycerols (TGs) in hepatocytes. We tested whether 2',3',5'-tri-acetyl-N6-(3-hydroxylaniline) adenosine (IMM-H007) can eliminate hepatic steatosis in hamsters fed a high-fat diet (HFD), as a model of NAFLD. Compared with HFD-only controls, IMM-H007 treatment significantly lowered serum levels of TG, total cholesterol, and free fatty acids (FFAs) in hamsters fed the HFD, with a prominent decrease in levels of serum transaminases and fasting insulin, without affecting fasting glucose levels...
September 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28900935/metabolic-disorders-and-cancer-hepatocyte-store-operated-ca-2-channels-in-nonalcoholic-fatty-liver-disease
#12
Eunüs S Ali, Grigori Y Rychkov, Greg J Barritt
In steatotic hepatocytes, intracellular Ca(2+) homeostasis is substantially altered compared to normal. Decreased Ca(2+) in the endoplasmic reticulum (ER) can lead to ER stress, an important mediator of the progression of liver steatosis to nonalcoholic steatohepatitis, type 2 diabetes, and hepatocellular carcinoma. Store-operated Ca(2+) channels (SOCs) in hepatocytes are composed principally of Orai1 and STIM1 proteins. Their main role is the maintenance of adequate Ca(2+) in the lumen of the ER. In steatotic hepatocytes, store-operated Ca(2+) entry (SOCE) is substantially inhibited...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28900540/treatment-of-diabetic-mice-with-the-sglt2-inhibitor-ta-1887-antagonizes-diabetic-cachexia-and-decreases-mortality
#13
Taichi Sugizaki, Shunshun Zhu, Ge Guo, Akiko Matsumoto, Jiabin Zhao, Motoyoshi Endo, Haruki Horiguchi, Jun Morinaga, Zhe Tian, Tsuyoshi Kadomatsu, Keishi Miyata, Hiroshi Itoh, Yuichi Oike
A favorable effect of an inhibitor of the sodium-glucose cotransporter 2 (SGLT2i) on mortality of diabetic patients was recently reported, although mechanisms underlying that effect remained unclear. Here, we examine SGLT2i effects on survival of diabetic mice and assess factors underlying these outcomes. To examine SGLT2i treatment effects in a model of severe diabetes, we fed genetically diabetic db/db mice a high-fat diet and then assessed outcomes including diabetic complications between SGLT2i TA-1887-treated and control mice...
2017: NPJ Aging and Mechanisms of Disease
https://www.readbyqxmd.com/read/28900141/dianxianning-improved-amyloid-%C3%AE-induced-pathological-characteristics-partially-through-daf-2-daf-16-insulin-like-pathway-in-transgenic-c-elegans
#14
Dejuan Zhi, Dong Wang, Wenqi Yang, Ziyun Duan, Shuqian Zhu, Juan Dong, Na Wang, Ningbo Wang, Dongqing Fei, Zhanxin Zhang, Xin Wang, Meizhu Wang, Hongyu Li
Dianxianning (DXN) is a traditional Chinese formula, and has been approved in China for treating epilepsy since 1996. Here anti-Alzheimer's disease activity of DXN has been reported. DXN improved AD-like symptoms of paralysis and 5-HT sensitivity of transgenic Aβ1-42 C. elegans. In worms, DXN significantly increased Aβ monomers and decreased the toxic Aβ oligomers, thus reducing Aβ toxicity. DXN significantly suppressed the expression of hsp-16.2 induced by juglone, and up-regulated sod-3 expression. These results indicated that DXN increased stress resistance and protected C...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899694/anti-atherosclerotic-effect-of-hesperidin-in-ldlr-mice-and-its-possible-mechanism
#15
Ye-Zi Sun, Jian-Fei Chen, Li-Min Shen, Ji Zhou, Cui-Fang Wang
Hesperidin, a citrus bioflavonoid, exerts numerous pharmacological activities. However, its protective effect against atherosclerosis in vivo remains poorly understood. In the present study, we aimed to observe the effects of hesperidin on high fat diet (HFD)-induced atherosclerosis using LDL receptor deficient (LDLr(-/-)) mice. After 12 weeks of treatment, the animals were sacrificed. The blood samples were collected for further analysis. Mouse peritoneal macrophages were collected. Hepatic lipid content, quantification of atherosclerosis, assessment of oxidative stress and inflammation, gene expressions were performed on liver and aorta samples...
September 9, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28899227/phenethyl-isothiocyanate-protects-against-h2o2-induced-insulin-resistance-in-3t3-l1-adipocytes
#16
Moe Nagami, Yoshiaki Ito, Takashi Nagasawa
Obesity is associated with systemic oxidative stress and leads to insulin resistance. Phenethyl isothiocyanate (PEITC), a natural dietary isothiocyanate, has been shown to have beneficial effects in improving cellular defense activities against oxidative stress through activation of nuclear factor erythroid-2 related factor 2 (Nrf2) pathway. However, little evidence exists if the antioxidative activity has beneficial effects on glucose metabolism. Here, we tested the preventive potential of PEITC for impaired insulin-induced glucose uptake by oxidative stress in 3T3-L1 adipocytes...
September 13, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28894507/foxo-transcriptional-factors-and-long-term-living
#17
REVIEW
Ghulam Murtaza, Abida Kalsoom Khan, Rehana Rashid, Saiqa Muneer, Syed Muhammad Farid Hasan, Jianxin Chen
Several pathologies such as neurodegeneration and cancer are associated with aging, which is affected by many genetic and environmental factors. Healthy aging conceives human longevity, possibly due to carrying the defensive genes. For instance, FOXO (forkhead box O) genes determine human longevity. FOXO transcription factors are involved in the regulation of longevity phenomenon via insulin and insulin-like growth factor signaling. Only one FOXO gene (FOXO DAF-16) exists in invertebrates, while four FOXO genes, that is, FOXO1, FOXO3, FOXO4, and FOXO6 are found in mammals...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28892255/does-cardiovascular-risk-vary-according-to-the-criteria-for-a-diagnosis-of-polycystic-ovary-syndrome
#18
Sedef Ramoglu, Tevfik Yoldemir, Kemal Atasayan, Dilek Gogas Yavuz
AIM: The risk of cardiovascular disease is higher in women with polycystic ovary syndrome (PCOS) compared to healthy individuals. Chronic inflammation, insulin resistance, hyperandrogenemia, hyperlipidemia and increased oxidative stress are known to have a role in the formation of atherosclerosis and cardiovascular disease. The aim of our study was to evaluate if cardiovascular risk varied according to different PCOS criteria, using carotid intima-media thickness (CIMT), which is an important marker of major cardiovascular events in the later stages of life...
September 11, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28889049/the-potential-impact-of-biochemical-mediators-on-telomere-attrition-in-major-depressive-disorder-and-implications-for-future-study-designs-a-narrative-review
#19
REVIEW
Andrei Manoliu, Oliver G Bosch, Janis Brakowski, Annette B Brühl, Erich Seifritz
BACKGROUND: Major depressive disorder (MDD) has been proposed to represent a "disease of premature aging", which is associated with certain biomarkers of cellular ageing and numerous other age-related diseases. Over the last decade, telomere length (TL) arose as a surrogate for cellular aging. Recent data suggests that TL might be reduced in patients with MDD, however, results are still inconclusive. This might be explained by the lack of assessment of potential biochemical mediators that are directly associated with telomere shortening and frequently observed in patients with MDD...
August 15, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28887124/impaired-insulin-signaling-upon-loss-of-ovarian-function-is-associated-with-a-reduction-of-tristetraprolin-and-an-increased-stabilization-of-chemokine-in-adipose-tissue
#20
Eun-Kyung Choi, Monisha Rajasekaran, Ok-Joo Sul, Yeonsoo Joe, Hyun-Taeg Chung, Rina Yu, Hye-Seon Choi
Loss of ovarian function can activate inflammation and lead to insulin resistance (IR). IR is also a core feature of obesity and obesity-associated metabolic dysfunction. Tristetraprolin/zinc finger protein 36 (TTP) interferes with TNF-α production by destabilizing TNF-α mRNA, and mice deficient in TTP develop a complex syndrome of inflammatory disease (Carballo et al., 1998; Taylor et al., 1999). We hypothesized that ovariectomy (OVX) might also prime inflammation by reducing tristetraprolin/zinc finger protein 36 (TTP) levels...
September 5, 2017: Molecular and Cellular Endocrinology
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