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https://www.readbyqxmd.com/read/27922115/perilipin-5-fine-tunes-lipid-oxidation-to-metabolic-demand-and-protects-against-lipotoxicity-in-skeletal-muscle
#1
Claire Laurens, Virginie Bourlier, Aline Mairal, Katie Louche, Pierre-Marie Badin, Etienne Mouisel, Alexandra Montagner, André Marette, Angelo Tremblay, John S Weisnagel, Hervé Guillou, Dominique Langin, Denis R Joanisse, Cedric Moro
Lipid droplets (LD) play a central role in lipid homeostasis by controlling transient fatty acid (FA) storage and release from triacylglycerols stores, while preventing high levels of cellular toxic lipids. This crucial function in oxidative tissues is altered in obesity and type 2 diabetes. Perilipin 5 (PLIN5) is a LD protein whose mechanistic and causal link with lipotoxicity and insulin resistance has raised controversies. We investigated here the physiological role of PLIN5 in skeletal muscle upon various metabolic challenges...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921429/-congenital-hyperinsulinism-loss-of-b-cell-self-control
#2
Jan Lebl, Klára Roženková, Štěpánka Průhová
Congenital hyperinsulinism is a serious blood glucose regulation defect that interferes with brain development, leading to mental retardation, neurological sequelae and secondary epilepsy and ultimately may be life-threatening. Congenital hyperinsulinism (CHI) is caused by genetic defects of regulation of insulin secretion that induce insulin oversecretion in intrauterine life and postnatally. The clinical consequence is fetal macrosomia and subsequently neonatal and infantile hypoglycaemia. The most severe form is caused by biallelic mutations of KCNJ11 and ABCC8 genes that encode both potassium channel subunits, whereas their heterozygous mutations as well as enzymatic defects (GLUD1, HADH, GCK) lead to milder presentation...
2016: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/27921351/the-effect-of-combined-inositol-hexakisphosphate-and-inositol-supplement-in-streptozotocin-induced-type-2-diabetic-rats
#3
Shadae R Foster, Felix O Omoruyi, Juan Bustamante, Ruby L A Lindo, Lowell L Dilworth
Inositol hexakisphosphate (IP6) and inositol both regulate insulin secretion, but their combined use in the management of diabetes deserves investigation. The combined effects of IP6 and inositol supplementation were investigated in streptozotocin-induced type 2 diabetic rats. The following groups of rats were studied for 8 weeks: non-diabetic control, non-diabetic high-fat diet control, diabetic untreated, diabetic rats treated with the combination of IP6 and inositol (650 mg/kg bw) and diabetic rats treated with glibenclamide (10 mg/kg bw)...
December 6, 2016: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/27921040/new-insights-into-the-molecular-mechanisms-targeting-tubular-channels-transporters-in-pkd-development
#4
REVIEW
Ming Wu, Shengqiang Yu
BACKGROUND: Autosomal dominant polycystic kidney disease (PKD) or autosomal recessive PKD is caused by a mutation in the PKD1, PKD2 or PKHD1 gene, which encodes polycystin-1, polycystin-2 or fibrocystin, respectively. Embryonic and postnatal mutation studies show that transport or channel function is dysregulated before the initiation of cystogenesis, suggesting that the abnormality of transport or channel function plays a critical role in the pathology of PKD. SUMMARY: Polycystin-2 by itself is a calcium-permeable cation channel, and its channel function can be regulated by polycystin-1 or fibrocystin...
October 2016: Kidney Diseases
https://www.readbyqxmd.com/read/27920295/a-novel-transcriptional-regulator-related-to-thiamine-phosphate-synthase-controls-thiamine-metabolism-genes-in-archaea
#5
Dmitry A Rodionov, Semen A Leyn, Xiaoqing Li, Irina A Rodionova
: Thiamine (vitamin B1) is a precursor of thiamine pyrophosphate (TPP), an essential coenzyme in the central metabolism of all living organisms. Bacterial thiamin biosynthesis and salvage genes are controlled at the RNA level by TPP-responsive riboswitches. In Archaea, TPP riboswitches are restricted to the Thermoplasmatales order. Mechanisms of transcriptional control of thiamine genes in other archaeal lineages remain unknown. Using the comparative genomics approach, we identified a novel family of transcriptional regulators (named ThiR) controlling thiamine biosynthesis and transport genes in diverse lineages from the Crenarchaeota phylum, as well as in the Halobacteria and Thermococci classes of the Euryarchaeota ThiR regulators are composed of an N-terminal DNA-binding domain and a C-terminal ligand-binding domain that is similar to the archaeal thiamin phosphate synthase ThiN...
December 5, 2016: Journal of Bacteriology
https://www.readbyqxmd.com/read/27920093/metformin-reduces-glycometabolism-of-papillary-thyroid-carcinoma-in-vitro-and-in-vivo
#6
Chen-Tian Shen, Wei-Jun Wei, Zhong-Ling Qiu, Hong-Jun Song, Xin-Yun Zhang, Zhen-Kui Sun, Quan-Yong Luo
More aggressive thyroid cancer cells show a higher activity of glycometabolism. Targeting cancer cell metabolism has emerged as a novel approach to prevent or treat malignant tumors. Glucose metabolism regulation effect of metformin in papillary thyroid cancer was investigated in the current study. Human papillary thyroid carcinoma (PTC) cell lines BCPAP and KTC1 were used. Cell viability was detected by CCK8 assay. Glucose uptake and relative gene expression were measured in metformin (0-10 mM for 48 h)-treated cells by (18)F-FDG uptake assay and western blotting analysis, respectively...
January 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/27919710/the-transcription-factor-carbohydrate-response-element-binding-protein-chrebp-a-possible-link-between-metabolic-disease-and-cancer
#7
REVIEW
Katsumi Iizuka
Carbohydrate-response element-binding protein (ChREBP) has been identified as a transcription factor that binds to carbohydrate response element in the promoter of pyruvate kinase, liver and red blood cells. ChREBP is activated by metabolites derived from glucose and suppressed by adenosine monophosphate (AMP), ketone bodies and cyclic cAMP. ChREBP regulates gene transcription related to glucose and lipid metabolism. Findings from knockout mice and human subjects suggest that ChREBP helps to induce hepatic steatosis, dyslipidemia, and glucose intolerance...
December 2, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27919232/microrna-27a-rs895819-is-associated-with-obesity-in-hiv-infected-preeclamptic-black-south-african-women-on-haart
#8
Niren Ray Maharaj, Prithiksha Ramkaran, Siddharthiya Pillay, Anil Amichund Chuturgoon
BACKGROUND: Preeclampsia (PE) and HIV/AIDS present a major health challenge globally. South Africa has the highest disease burden of both HIV/AIDS and PE in the world. Despite extensive research, the pathophysiology of these conditions is not completely understood, however a genetic predisposition in women may affect susceptibility. MiRNA-27a regulates adipogenesis and glucose metabolism. A single nucleotide polymorphism (SNP) in miRNA-27a (rs895819T > C) has shown to have disparate effects in various populations...
December 5, 2016: BMC Medical Genetics
https://www.readbyqxmd.com/read/27918955/defective-production-of-interleukin-1-beta-in-patients-with-type-2-diabetes-mellitus-restoration-by-proper-glycemic-control
#9
Foteini Kousathana, Marianna Georgitsi, Vaia Lambadiari, Evangelos J Giamarellos-Bourboulis, George Dimitriadis, Maria Mouktaroudi
The underlying immune defect of susceptibility in diabetes mellitus type 2 to infections remains unknown. The qualitative changes in cytokine biosynthesis by circulating mononuclear cells (PBMCs) and its modulation by glycemic control were investigated. PBMCs were isolated from 39 patients and 25 controls. They were stimulated with purified ligands and heat-killed bacteria in the absence/presence of glucose and NLPR3 inflammasome ligands. Experiments were repeated after 3 and 6months. Cytokine production was measured in cell supernatants; pro-interleukin(IL)-1 β was measured in cell lysates...
December 2, 2016: Cytokine
https://www.readbyqxmd.com/read/27918884/acute-invasive-fungal-rhinosinusitis-presentation-of-19-cases-review-of-the-literature-and-a-new-classification-system
#10
Onur Ergun, Emel Tahir, Oguz Kuscu, Burce Ozgen, Taner Yilmaz
PURPOSE: The aim of this study was to determine the correlation between acute invasive fungal rhinosinusitis (AIFRS) and underlying diseases, micro-organisms, presenting symptoms, extent of disease, radiologic findings, and outcomes and propose a new classification system. MATERIALS AND METHODS: The data of 19 AIFRS cases were analyzed retrospectively. Magnetic resonance imaging and computed tomography were performed in all patients preoperatively. All patients underwent at least 1 surgical debridement...
November 15, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27918551/hepatocarcinogenesis-in-transgenic-mice-carrying-hepatitis-b-virus-pre-s-s-gene-with-the-sw172-mutation
#11
M-W Lai, K-H Liang, W-R Lin, Y-H Huang, S-F Huang, T-C Chen, C-T Yeh
Hepatitis B virus (HBV) carrying the rtA181T/sW172* mutation conferred cross-resistance to adefovir and lamivudine. Cell-based and clinical studies indicated that HBV carrying this mutation had an increased oncogenic potential. Herein, we created transgenic mouse models to study the oncogenicity of the HBV pre-S/S gene containing this mutation. Transgenic mice were generated by transfer of the HBV pre-S/S gene together with its own promoter into C57B6 mice. Four lines of mice were created. Two of them carried wild-type gene and produced high and low levels of HBV surface antigen (HBsAg) (TgWT-H and L)...
December 5, 2016: Oncogenesis
https://www.readbyqxmd.com/read/27918469/dietary-compound-chrysin-inhibits-retinal-neovascularization-with-abnormal-capillaries-in-db-db-mice
#12
Min-Kyung Kang, Sin-Hye Park, Yun-Ho Kim, Eun-Jung Lee, Lucia Dwi Antika, Dong Yeon Kim, Yean-Jung Choi, Young-Hee Kang
Diabetic retinopathy (DR) develops in a significant proportion of patients with chronic diabetes, characterized by retinal macular edema and abnormal retinal vessel outgrowth leading to vision loss. Chrysin, a naturally-occurring flavonoid found in herb and honeycomb, has anti-inflammatory, antioxidant, and anti-cancer properties. This study sought to determine the protective effects of chrysin on retinal neovascularization with abnormal vessels and blood-retinal barrier (BRB) breakdown in 33 mM glucose-exposed human retinal endothelial cells and in db/db mouse eyes...
December 3, 2016: Nutrients
https://www.readbyqxmd.com/read/27918111/imatinib-accelerates-progenitor-cell-mediated-liver-regeneration-in-choline-deficient-ethionine-supplemented-diet-fed-mice
#13
András Rókusz, Edina Bugyik, Vanessza Szabó, Armanda Szücs, Sándor Paku, Péter Nagy, Katalin Dezső
Severe chronic hepatic injury can induce complex reparative processes. Ductular reaction and the appearance of small hepatocytes are standard components of this response, which is thought to have both adverse (e.g. fibrosis, carcinogenesis) and beneficial (regeneration) consequences. This complex tissue reaction is regulated by orchestrated cytokine action. We have investigated the influence of the tyrosine kinase inhibitor imatinib on a regenerative process. Ductular reaction was induced in mice by the widely used choline-deficient ethionine-supplemented diet (CDE)...
December 5, 2016: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/27918085/ppar%C3%AE-promotes-cancer-cell-glut1-transcription-repression
#14
Mengli You, Jianhua Jin, Qian Liu, QingGang Xu, Juanjuan Shi, Yongzhong Hou
Abundant nutrient availability including glucose and amino acids plays an important role in maintaining cancer cell energetic and biosynthetic pathways. As a nuclear receptor, peroxisome-proliferator-activated receptor α (PPARα) regulates inflammation and cancer progression, however, it is still unclear the interaction of PPARα with the cancer cell glucose metabolism. Here we found that PPARα reduced Glut1 (Glucose transporter 1) protein and gene levels in HCT-116, SW480, HeLa, and MCF-7 cancer cell lines...
December 5, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27917940/ubiquitin-ligase-nedd4-regulates-ppar%C3%AE-stability-and-adipocyte-differentiation-in-3t3-l1-cells
#15
Jing Jing Li, Ruishan Wang, Rati Lama, Xinjiang Wang, Z Elizabeth Floyd, Edwards A Park, Francesca-Fang Liao
Peroxisome proliferator-activated receptor-γ (PPARγ) is a ligand-activated nuclear receptor which controls lipid and glucose metabolism. It is also the master regulator of adipogenesis. In adipocytes, ligand-dependent PPARγ activation is associated with proteasomal degradation; therefore, regulation of PPARγ degradation may modulate its transcriptional activity. Here, we show that neural precursor cell expressed developmentally down-regulated protein 4 (NEDD4), an E3 ubiquitin ligase, interacts with the hinge and ligand binding domains of PPARγ and is a bona fide E3 ligase for PPARγ...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27916987/weight-loss-induced-cellular-stress-in-subcutaneous-adipose-tissue-and-the-risk-for-weight-regain-in-overweight-and-obese-adults
#16
N J T Roumans, R G Vink, F G Bouwman, P Fazelzadeh, M A van Baak, E C M Mariman
BACKGROUND/OBJECTIVE: Weight loss is often followed by weight regain after the dietary intervention (DI). Cellular stress is increased in adipose tissue of obese individuals. However, the relation between cellular stress and weight regain is unclear. Previously, we observed increased adipose tissue cellular stress of participants regaining weight compared to participants maintaining weight loss. In the current study, we further investigated the relation between weight regain and changes in the expression of stress-related genes and stress protein levels to determine possible predictors of weight regain...
December 5, 2016: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27916819/the-nutritional-value-and-health-benefits-of-chickpeas-and-hummus
#17
REVIEW
Taylor C Wallace, Robert Murray, Kathleen M Zelman
The 2015-2020 Dietary Guidelines for Americans advocate for increasing vegetable intake and replacing energy-dense foods with those that are nutrient-dense. Most Americans do not eat enough vegetables, and particularly legumes, each day, despite their well-established benefits for health. Traditional hummus is a nutrient-dense dip or spread made from cooked, mashed chickpeas, blended with tahini, olive oil, lemon juice, and spices. Consumers of chickpeas and/or hummus have been shown to have higher nutrient intakes of dietary fiber, polyunsaturated fatty acids, vitamin A, vitamin E, vitamin C, folate, magnesium, potassium, and iron as compared to non-consumers...
November 29, 2016: Nutrients
https://www.readbyqxmd.com/read/27916647/ppars-and-nonalcoholic-fatty-liver-disease
#18
REVIEW
Kim H H Liss, Brian N Finck
Nonalcoholic fatty liver disease (NAFLD) encompasses a range of liver pathology ranging from simple steatosis to varying degrees of inflammation, hepatocyte injury and fibrosis. Without intervention it can progress to end-stage liver disease and hepatocellular carcinoma. Given its close association with obesity, the prevalence of NAFLD has increased dramatically worldwide. Currently, there are no FDA-approved medications for the treatment of NAFLD and although lifestyle modifications with appropriate diet and exercise have been shown to be beneficial, this has been difficult to achieve and sustain for the majority of patients...
December 1, 2016: Biochimie
https://www.readbyqxmd.com/read/27916646/roles-of-peroxisome-proliferator-activated-receptor-%C3%AE-%C3%AE-in-skeletal-muscle-physiology
#19
REVIEW
Ravikumar Manickam, Walter Wahli
More than two decades of studying peroxisome proliferator-activated receptors (PPARs) has led to an understanding of their implications in various physiological processes that are key for health and disease. All three PPAR isotypes, PPARα, PPARβ/δ, and PPARγ, are activated by a variety of molecules, including fatty acids, eicosanoids and phospholipids, and regulate a spectrum of genes involved in development, lipid and carbohydrate metabolism, inflammation, and proliferation and differentiation of many cell types in different tissues...
December 1, 2016: Biochimie
https://www.readbyqxmd.com/read/27916483/serum-klotho-protein-levels-and-their-correlations-with-the-progression-of-type-2-diabetes-mellitus
#20
Fang Nie, Dongming Wu, Hongfei Du, Xianggui Yang, Min Yang, Xueli Pang, Ying Xu
AIM: To investigate the associations of serum α-Klotho and β-Klotho levels with type 2 diabetes mellitus (T2DM) progression. METHODS: We evaluated 106 healthy controls and 261 cases of T2DM with or without diabetic complications (range: 45-84years). Serum α-Klotho and β-Klotho levels were analyzed using enzyme-linked immunosorbent assays. RESULTS: Compared to the healthy controls, α-Klotho and β-Klotho levels were significantly lower among patients with T2DM and with or without diabetic complications (P<0...
November 12, 2016: Journal of Diabetes and its Complications
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