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Mitochondrial liver

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https://www.readbyqxmd.com/read/28341344/propofol-affinity-to-mitochondrial-membranes-does-not-alter-mitochondrial-function
#1
Luís M Félix, Fernando Correia, Pedro A Pinto, Sónia P Campos, Telma Fernandes, Romeu Videira, M Manuel Oliveira, Francisco P Peixoto, Luís M Antunes
The molecular mechanisms of hepatotoxicity after propofol anaesthesia have not been fully elucidated, although there is a relation with mitochondrial dysfunction. The action of propofol on mitochondrial hepatic functions in a rat model was evaluated by infusion for 4h with 25 and 62.5mg/kg/h propofol or 3.125ml/kg/h (vehicle). Liver mitochondrial respiratory rates were evaluated as well as mitochondrial transmembrane potential (ΔΨ), calcium fluxes, mitochondrial enzymatic activities (Complex I - V) and oxidative stress biomarkers (superoxide dismutase, catalase, glutathione reductase, glutathione S-transferase, lipid peroxidation and the oxidized/reduced glutathione ratio)...
March 21, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28339712/effect-of-chinese-herbal-medicine-treatment-on-plasma-lipid-profile-and-hepatic-lipid-metabolism-in-hetian-broiler
#2
Z Xie, J Zhang, S Ma, X Huang, Y Huang
The purpose of this study was to investigate whether adding a Chinese herbal hedicine (CHM, including astragalus membranaceus, codonopsis pilosula, poria cocos, bighead atractylodes rhizome, fructus crataegi, folium epimedii, radix saposhnikoviae, and pericarpium citri reticulatae) diet has effects on lipid metabolism in the liver of the broiler. Six-hundred-thirty Hetian broilers were divided into 3 groups including base diet (control), 0.3%, or 1% CHM diets, for 130 days. The results showed that CHM treatment significantly increased the slaughter performance...
February 21, 2017: Poultry Science
https://www.readbyqxmd.com/read/28338610/fructose-rich-diet-affects-mitochondrial-dna-damage-and-repair-in-rats
#3
Federica Cioffi, Rosalba Senese, Pasquale Lasala, Angela Ziello, Arianna Mazzoli, Raffaella Crescenzo, Giovanna Liverini, Antonia Lanni, Fernando Goglia, Susanna Iossa
Evidence indicates that many forms of fructose-induced metabolic disturbance are associated with oxidative stress and mitochondrial dysfunction. Mitochondria are prominent targets of oxidative damage; however, it is not clear whether mitochondrial DNA (mtDNA) damage and/or its lack of repair are events involved in metabolic disease resulting from a fructose-rich diet. In the present study, we evaluated the degree of oxidative damage to liver mtDNA and its repair, in addition to the state of oxidative stress and antioxidant defense in the liver of rats fed a high-fructose diet...
March 24, 2017: Nutrients
https://www.readbyqxmd.com/read/28337566/liver-mitochondrial-membrane-fluidity-at-early-development-of-diabetes-and-its-correlation-with-the-respiration
#4
Ismael H Pérez-Hernández, Josué Misael Domínguez-Fuentes, Martín Palomar-Morales, Ana Cecilia Zazueta-Mendizabal, Arturo Baiza-Gutman, Ricardo Mejía-Zepeda
The biological membranes are important in cell function but, during development of diseases such as diabetes, they are impaired. Consequently, membrane-associated biological processes are impaired as well. The mitochondria are important organelles where oxidative phosphorylation takes place, a process closely related with the membranes. In general, it is accepted that the development process of diabetes decreases membrane fluidity. However, in some cases, it has been found to increase membrane fluidity of mitochondria but to decrease the Respiratory Control (RC) index...
March 24, 2017: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/28337269/the-role-of-prrx1-in-the-apoptosis-of-a549-cells-induced-by-cisplatin
#5
Hongbin Zhu, Gengyun Sun, Jiahui Dong, Liming Fei
Paired related homeobox1 (PRRX1) was a newly identified Epithelial mesenchymal transition (EMT) inducer. It was found that the decreased expression of PRRX1 in breast cancer and liver cancer could enable tumor cells to obtain tumor stem cell characteristics in vitro studies. However, the role of PRRX1 in lung cancer was still unknown. The down-regulated PRRX1 gene in A549 cells was established by slow virus infection in this study. The apoptosis of A549 cells was observed after the treatment of different concentrations of cisplatin and the role of PRRX1 in the apoptosis of A549 cells was explored...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28337244/rat-liver-enzyme-release-depends-on-blood-flow-bearing-physical-forces-acting-in-endothelium-glycocalyx-rather-than-on-liver-damage
#6
Julieta A Díaz-Juárez, Rolando Hernández-Muñoz
We have found selective elevation of serum enzyme activities in rats subjected to partial hepatectomy (PH), apparently controlled by hemodynamic flow-bearing physical forces. Here, we assess the involvement of stretch-sensitive calcium channels and calcium mobilization in isolated livers, after chemical modifications of the endothelial glycocalyx and changing perfusion directionality. Inhibiting in vivo protein synthesis, we found that liver enzyme release is influenced by de novo synthesis of endothelial glycocalyx components, and released enzymes are confined into a liver "pool...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28336227/aqueous-calyxes-extract-of-roselle-or-hibiscus-sabdariffa-linn-supplementation-improves-liver-morphology-in-streptozotocin-induced-diabetic-rats
#7
Akhtar Husin Nazratun Nafizah, Siti Balkis Budin, Abd Hamid Zaryantey, Abd Rahman Mariati, Raj Louis Santhana, Mohamad Osman, Md Idris Muhd Hanis, Mohamed Jamaludin
BACKGROUND AND STUDY AIMS: The complex series of deleterious events among diabetes patients leads to multiple organ failure. Therefore, a holistic approach of treatment is urgently required to prevent worsening of complications. The present investigation was carried out to study the possible protective effects of Roselle or Hibiscus sabdariffa Linn (HSL) calyxes aqueous extract, as an antidiabetic and antioxidant agent against oxidative liver injury in streptozotocin-induced diabetic rats...
March 20, 2017: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/28334508/dietary-fatty-acids-influence-sperm-quality-and-function
#8
A Ferramosca, N Moscatelli, M Di Giacomo, V Zara
Recently, obesity has been linked to male infertility. In animal models the administration of a high-fat diet caused a reduction in sperm quality, by impairing gamete energy metabolism. The aim of this study was to investigate a possible effect of dietary fatty acids supplementation in the modulation of sperm energy metabolism and, in turn, in the improvement of sperm quality in rats fed a high-fat diet. Sexually mature male Sprague-Dawley rats were divided into four groups and fed for 4 weeks a standard diet (control group), a high-fat diet (enriched in 35% of fat and 15% sucrose), a high-fat diet supplemented with 2...
March 23, 2017: Andrology
https://www.readbyqxmd.com/read/28332019/comparative-tissue-transcriptomics-highlights-dynamic-differences-among-tissues-but-conserved-metabolic-transcript-prioritization-in-preparation-for-arousal-from-torpor
#9
Lori K Bogren, Katharine R Grabek, Gregory S Barsh, Sandra L Martin
During the hibernation season, 13-lined ground squirrels spend days to weeks in torpor with body temperatures near freezing then spontaneously rewarm. The molecular drivers of the drastic physiological changes that orchestrate and permit torpor are not well understood. Although transcription effectively ceases at the low body temperatures of torpor, previous work has demonstrated that some transcripts are protected from bulk degradation in brown adipose tissue (BAT), consistent with the importance of their protein products for metabolic heat generation during arousal from torpor...
March 23, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28331564/effects-of-butyric-acid-and-arsenic-on-isolated-pancreatic-islets-and-liver-mitochondria-of-male-mouse
#10
Akram Ahangarpour, Ali Akbar Oroojan, Mohsen Rezae, Mohammad Javad Khodayar, Soheila Alboghobeish, Marzieh Zeinvand
AIM: The aim of the present study was to evaluate the different doses of Butyric acid (BA) and Arsenic (As) in liver mitochondria oxidative stress and pancreatic islet insulin secretion of male mouse. BACKGROUND: BA is found in many foods and As as a toxic metal is present in drinking water. They can induce oxidative stress in tissues. METHODS: In this experimental study, Liver mitochondria were isolated by administration of the different centrifugation method and pancreatic islets were isolated by collagenase method...
2017: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/28330852/a-controlled-release-mitochondrial-protonophore-reverses-hypertriglyceridemia-nonalcoholic-steatohepatitis-and-diabetes-in-lipodystrophic-mice
#11
Abudukadier Abulizi, Rachel J Perry, João Paulo G Camporez, Michael J Jurczak, Kitt Falk Petersen, Patricia Aspichueta, Gerald I Shulman
Lipodystrophy is a rare disorder characterized by complete or partial loss of adipose tissue. Patients with lipodystrophy exhibit hypertriglyceridemia, severe insulin resistance, type 2 diabetes, and nonalcoholic steatohepatitis (NASH). Efforts to ameliorate NASH in lipodystrophies with pharmacologic agents have met with limited success. We examined whether a controlled-release mitochondrial protonophore (CRMP) that produces mild liver-targeted mitochondrial uncoupling could decrease hypertriglyceridemia and reverse NASH and diabetes in a mouse model (fatless AZIP/F-1 mice) of severe lipodystrophy and diabetes...
March 22, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28329820/hepatocellular-toxicity-of-imidazole-and-triazole-antimycotic-agents
#12
Patrizia Haegler, Lorenz Joerin, Stephan Krähenbühl, Jamal Bouitbir
Hepatotoxicity has been described for all antimycotic azoles currently marketed. A possible mechanism involving mitochondrial dysfunction has been postulated for ketoconazole, but not for the other azoles. The aim of the current investigations was to study the toxicity of different azoles in human cell models and to find out mechanisms of their toxicity. In HepG2 cells, posaconazole and ketoconazole were cytotoxic starting at 20 and 50 µM and decreased the cellular ATP content starting at 5 and 10 µM, respectively...
January 27, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28323103/cr-vi-induces-cytotoxicity-in-vitro-through-activation-of-ros-mediated-endoplasmic-reticulum-stress-and-mitochondrial-dysfunction-via-the-pi3k-akt-signaling-pathway
#13
Yujing Zhang, Fang Xiao, Xinmin Liu, Kaihua Liu, Xiaoxin Zhou, Caigao Zhong
The occupational and environmental toxicant hexavalent chromium [Cr(VI)] can cause severe damage to the liver; however, the exact mechanisms associated with its toxicity have not been thoroughly demonstrated. In the present study, the underlying mechanisms of Cr(VI)-induced hepatotoxicity were investigated. Our results showed that Cr(VI) inhibited the growth and proliferation of L-02 hepatocytes. Further study revealed that Cr(VI) significantly induced S-phase cell cycle arrest and apoptosis accompanying with the overproduction of reactive oxygen species (ROS)...
March 17, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28322544/graphene-oxide-quantum-dots-as-novel-nanozymes-for-alcohol-intoxication
#14
Anqi Sun, Li Mu, Xiangang Hu
Alcohol overconsumption as a worldwide issue results in alcoholic liver disease (ALD), such as steatosis, alcoholic hepatitis and cirrhosis. The treatment of ALD has been widely investigated but remains challenging. In this work, the protective effects of graphene oxide quantum dots (GOQDs) as novel nanozymes against alcohol overconsumption are discovered, and the specific mechanisms underlying these effects are elucidated via omics analysis. GOQDs dramatically alleviate the reduction of cell viability induced by ethanol and can act as nanozymes to accelerate ethanol metabolism and avoid the accumulation of toxic intermediates in cells...
March 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28322010/cholesterol-can-modulate-mitochondrial-aquaporin-8-expression-in-human-hepatic-cells
#15
Mauro Danielli, Alejo M Capiglioni, Julieta Marrone, Giuseppe Calamita, Raúl A Marinelli
Hepatocyte mitochondrial aquaporin-8 (mtAQP8) works as a multifunctional membrane channel protein that facilitates the uptake of ammonia for its detoxification to urea as well as the mitochondrial release of hydrogen peroxide. Since early oligonucleotide microarray studies in liver of cholesterol-fed mice showed an AQP8 downregulation, we tested whether alterations of cholesterol content per se modulate mtAQP8 expression in human hepatocyte-derived Huh-7 cells. Cholesterol loading with methyl-β-cyclodextrin (mβCD):cholesterol complexes downregulated the proteolytic activation of cholesterol-responsive sterol regulatory element-binding protein (SREBP) transcriptions factors 1 and 2, and the expression of the target gene 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR)...
March 20, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28321998/moderate-selenium-dosing-inhibited-chromium-vi-toxicity-in-chicken-liver
#16
Yang Wang, Yongxia Liu, Huiyu Wan, Yiran Zhu, Peng Chen, Pan Hao, Ziqiang Cheng, Jianzhu Liu
This study aimed to clarify the effect of selenium (Se) on chromium (VI) [Cr(VI)]-induced damage in chicken liver. A total of 105 chickens were randomly divided into seven groups of 15. Group I received deionized water; group II received Cr(VI) (7.83 mg/kg/d) alone; and other groups orally received both Cr(VI) (7.83 mg/kg/d) and Se of different doses (0.14, 0.29, 0.57, 1.14, and 2.28 mg/kg/d). The levels of superoxide dismutase (SOD), glutathione (GSH), malondialdehyde (MDA), Ca(2+) -ATPase, and mitochondrial membrane potential (MMP) were measured...
March 21, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28320303/substrate-specific-reduction-of-tetrazolium-salts-by-isolated-mitochondria-tissues-and-leukocytes
#17
N I Fedotcheva, E G Litvinova, M V Zakharchenko, N V Khunderyakova, R S Fadeev, V V Teplova, T A Fedotcheva, N V Beloborodova, M N Kondrashova
Tetrazolium salts are commonly used in cytochemical and biochemical studies as indicators of metabolic activity of cells. Formazans, formed by reduction of tetrazolium salts, behave as pseudo-solutions during initial incubation, which allows monitoring their optical density throughout incubation. The criteria and conditions for measuring oxidative activity of mitochondria and dehydrogenase activity in reduction of nitroblue tetrazolium (NBT) and methyl thiazolyl tetrazolium (MTT) in suspensions of isolated mitochondria, tissue homogenates, and leukocytes were investigated in this work...
February 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28317891/hepatic-mitochondrial-dysfunction-is-a-feature-of-glycogen-storage-disease-type-ia-gsdia
#18
Benjamin L Farah, Rohit A Sinha, Yajun Wu, Brijesh K Singh, Andrea Lim, Masahiro Hirayama, Dustin J Landau, Boon Huat Bay, Dwight D Koeberl, Paul M Yen
Glycogen storage disease type Ia (GSDIa, von Gierke disease) is the most common glycogen storage disorder. It is caused by the deficiency of glucose-6-phosphatase, an enzyme which catalyses the final step of gluconeogenesis and glycogenolysis. Clinically, GSDIa is characterized by fasting hypoglycaemia and hepatic glycogen and triglyceride overaccumulation. The latter leads to steatohepatitis, cirrhosis, and the formation of hepatic adenomas and carcinomas. Currently, little is known about the function of various organelles and their impact on metabolism in GSDIa...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28317281/comparison-of-dietary-polyphenols-for-protection-against-molecular-mechanisms-underlying-non-alcoholic-fatty-liver-disease-in-a-cell-model-of-steatosis
#19
Hossein Rafiei, Kosar Omidian, Brian Bandy
SCOPE: Dietary polyphenols have shown promise in protecting the liver against non-alcoholic fatty liver disease. The relative effectiveness and mechanisms of different polyphenols however is mostly unknown. METHODS AND RESULTS: In a model of steatosis using HepG2 hepatocytes, we evaluated the protective effects of different classes of polyphenols and the contributing mechanisms. Treatment of the cells with oleic acid increased ROS generation and expression of TNFα, decreased expression of UCP2 and decreased mitochondrial content and markers of biogenesis...
March 20, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28314476/polydatin-alleviates-alcohol-induced-acute-liver-injury-in-mice-relevance-of-matrix-metalloproteinases-mmps-and-hepatic-antioxidants
#20
Meghana Koneru, Bidya Dhar Sahu, Sagarika Gudem, Madhusudana Kuncha, Halley Gora Ravuri, Jerald Mahesh Kumar, Eswar Kumar Kilari, Ramakrishna Sistla
BACKGROUND: Alcohol, a most commonly consumed beverage, is the foremost cause of liver injury throughout the world. Polydatin, a stilbenoid glucoside, was known to possess antioxidant and anti-inflammatory properties and is being investigated for use in various disorders. PURPOSE: The present study was intended at investigating the hepatoprotective efficacy of polydatin against acute-alcohol induced liver injury model in mice. STUDY DESIGN: C57BL/6 mice were fed with five doses of 50% ethyl alcohol (10ml/kg body weight) to induce acute liver injury...
April 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
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