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adenosine triphosphate

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https://www.readbyqxmd.com/read/29663589/tying-trafficking-to-fusion-and-fission-at-the-mighty-mitochondria
#1
REVIEW
Trey Farmer, Naava Naslavsky, Steve Caplan
The mitochondrion is a unique organelle that serves as the main site of adenosine triphosphate (ATP) generation needed for energy in the cell. However, mitochondria also play essential roles in cell death through apoptosis and necrosis, as well as a variety of crucial functions related to stress regulation, autophagy, lipid synthesis, and calcium storage. There is a growing appreciation that mitochondrial function is regulated by the dynamics of its membrane fusion and fission; longer, fused mitochondria are optimal for ATP generation, whereas fission of mitochondria facilitates mitophagy and cell division...
April 16, 2018: Traffic
https://www.readbyqxmd.com/read/29663407/ground-beef-high-in-total-fat-and-saturated-fatty-acids-decreases-x-receptor-signaling-targets-in-peripheral-blood-mononuclear-cells-of-men-and-women
#2
Seong H Choi, Ghazal Gharahmany, Rosemary L Walzem, Thomas H Meade, Stephen B Smith
We hypothesized that consumption of saturated fatty acids in the form of high-fat ground beef for 5 weeks would depress liver X receptor signaling targets in peripheral blood mononuclear cells (PBMC) and that changes in gene expression would be associated with the corresponding changes in lipoprotein cholesterol (C) concentrations. Older men (n = 5, age 68.0 ± 4.6 years) and postmenopausal women (n = 7, age 60.9 ± 3.1 years) were assigned randomly to consume ground-beef containing 18% total fat (18F) or 25% total fat (25F), five patties per week for 5 weeks with an intervening 4-week washout period...
April 16, 2018: Lipids
https://www.readbyqxmd.com/read/29662820/effects-of-selenium-on-the-survival-and-invasion-of-trophoblasts
#3
Jee Yoon Na, Jin Seok, Sohae Park, Jung Seok Kim, Gi Jin Kim
Objective: Placental oxidative stress is known to be a factor that contributes to pregnancy failure. The aim of this study was to determine whether selenium could induce antioxidant gene expression and regulate invasive activity and mitochondrial activity in trophoblasts, which are a major cell type of the placenta. Methods: To understand the effects of selenium on trophoblast cells exposed to hypoxia, the viability and invasive activity of trophoblasts were analyzed...
March 2018: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/29662780/distinct-metabolic-programs-induced-by-tgf-%C3%AE-1-and-bmp2-in-human-articular-chondrocytes-with-osteoarthritis
#4
Cuicui Wang, Richard M Silverman, Jie Shen, Regis J O'Keefe
Objectives: Cellular energy metabolism is important for the function of all tissues, including cartilage. Recent studies indicate that superficial and deep subpopulations of articular chondrocytes (ACs) have distinct metabolic profiles. At the cellular and molecular level, osteoarthritis (OA) is characterised by alteration from a healthy homoeostatic state towards a catabolic state. Several molecular pathways, including transforming growth factor beta (TGF-β) and bone morphogenetic protein (BMP) signalling, have been identified as critical players in the pathogenesis and progression of OA...
January 2018: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29660027/the-6-hydroxychromanol-derivative-sul-109-ameliorates-renal-injury-after-deep-hypothermia-and-rewarming-in-rats
#5
Pieter C Vogelaar, Maurits Roorda, Edwin L de Vrij, Martin C Houwertjes, Maaike Goris, Hjalmar Bouma, Adrianus C van der Graaf, Guido Krenning, Robert H Henning
Background: Mitochondrial dysfunction plays an important role in kidney damage in various pathologies, including acute and chronic kidney injury and diabetic nephropathy. In addition to the well-studied ischaemia/reperfusion (I/R) injury, hypothermia/rewarming (H/R) also inflicts acute kidney injury. Substituted 6-hydroxychromanols are a novel class of mitochondrial medicines that ameliorate mitochondrial oxidative stress and protect the mitochondrial network. To identify a novel 6-hydroxychromanol that protects mitochondrial structure and function in the kidney during H/R, we screened multiple compounds in vitro and subsequently assessed the efficacy of the 6-hydroxychromanol derivatives SUL-109 and SUL-121 in vivo to protect against kidney injury after H/R in rats...
April 11, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29658876/use-of-l-glutamic-acid-in-a-new-enrichment-broth-r-tatp-broth-for-detecting-the-presence-or-absence-of-molds-in-raw-ingredients-personal-care-product-formulations-by-using-an-atp-bioluminescence-assay
#6
Youjun Yang, Donald J English
The present study reports the effects of adding L-glutamic acid to a new enrichment broth designated as R-TATP broth, to promote the growth of slow-growing mold microorganisms such as Aspergillus brasiliensis and Aspergillus oryzae , without interfering in the growth of other types of microorganisms. This L-glutamic acid containing enrichment broth would be particularly valuable in a rapid microbial detection assay such as an adenosine triphosphate (ATP) bioluminescence assay. By using this new enrichment broth, the amount of ATP (represented as relative light unit ratio after normalized with the negative test control) from mold growth was significantly increased by reducing the time of detection of microbial contamination in a raw ingredient or personal care product formulation from an incubation period of 48-18 h...
January 2018: Journal of Cosmetic Science
https://www.readbyqxmd.com/read/29658590/cucurbitacin-d-impedes-gastric-cancer-cell-survival-via-activation-of-the-inos-no-and-inhibition-of-the-akt-signalling-pathway
#7
Yan Zhen Zhang, Chun Feng Wang, Lian Feng Zhang
Cucurbitacin D (CuD), isolated from plants from the Cucurbitaceae family, is a potential antitumour agent since it inhibits proliferation, migration and metastasis of cancer cells. Despite CuD antitumour activity in cancer cells, the effects of CuD on gastric cancer cell lines remain unclear. The present study aimed to investigate the effects of CuD on gastric cancer cell growth and death. Human gastric cancer cell lines (AGS, SNU1 and Hs746T) were cultured and treated with different concentrations of CuD (0, 0...
April 10, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29655783/cytoto-xicity-of-34-fda-approved-small-molecule-kinase-inhibitor-s-in-primary-rat-and-human-hepatocytes
#8
Jun Zhang, Lijun Ren, Xi Yang, Matthew White, James Greenhaw, Tashika Harris, Qiangen Wu, Matthew Bryant, Thomas Papoian, William Mattes, Qiang Shi
Of the 34 FDA approved oral small-molecule kinase inhibitors (KI), 23 (68%) have warnings for hepatotoxicity in product labeling. To better understand the mechanisms of KI hepatotoxicity and whether such effects can be predicted, we examined 34 KIs for cytotoxicity in primary rat and human hepatocytes. The hepatocytes were treated with KIs at ten concentrations normalized to maximal therapeutic blood levels (Cmax). At 5 and 24 h post treatment, lactate dehydrogenase or alanine aminotransferase leakage, caspase 3/7 activities and cellular adenosine triphosphate levels were measured...
April 12, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29653214/poly-propylene-imine-glycodendrimers-non-covalently-bind-atp-in-a-ph-and-salt-dependent-manner-model-studies-for-adenosine-analogue-drug-delivery
#9
Michał Gorzkiewicz, Adam Buczkowski, Dietmar Appelhans, Brigitte Voit, Łukasz Pułaski, Bartłomiej Pałecz, Barbara Klajnert-Maculewicz
Adenosine analogue drugs (such as fludarabine or cladribine) require transporter-mediated uptake into cells and subsequent phosphorylation for anticancer activity. Therefore, application of nanocarrier systems for direct delivery of active triphosphate nucleotides has been proposed. Here, we applied isothermal titration calorimetry (ITC) and zeta potential titration to determine the stoichiometry and thermodynamic parameters of interactions between 4th generation poly(propylene imine) (PPI G4) dendrimers (unmodified or sugar-modified for increased biocompatibility) and ATP as a model adenosine nucleotide...
April 10, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29652806/excessive-extracellular-atp-desensitizes-p2y2-and-p2x4-atp-receptors-provoking-surfactant-impairment-ending-in-ventilation-induced-lung-injury
#10
REVIEW
Djo Hasan, Joshua Satalin, Philip van der Zee, Michaela Kollisch-Singule, Paul Blankman, Atsuko Shono, Peter Somhorst, Corstiaan den Uil, Han Meeder, Toru Kotani, Gary F Nieman
Stretching the alveolar epithelial type I (AT I) cells controls the intercellular signaling for the exocytosis of surfactant by the AT II cells through the extracellular release of adenosine triphosphate (ATP) (purinergic signaling). Extracellular ATP is cleared by extracellular ATPases, maintaining its homeostasis and enabling the lung to adapt the exocytosis of surfactant to the demand. Vigorous deformation of the AT I cells by high mechanical power ventilation causes a massive release of extracellular ATP beyond the clearance capacity of the extracellular ATPases...
April 13, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29649662/autophagy-attenuates-copper-induced-mitochondrial-dysfunction-by-regulating-oxidative-stress-in-chicken-hepatocytes
#11
Fan Yang, Jianzhao Liao, Ruonan Pei, Wenlan Yu, Qingyue Han, Ying Li, Jianying Guo, Lianmei Hu, Jiaqiang Pan, Zhaoxin Tang
Copper (Cu) is an essential trace element that is required for the catalysis of several cellular enzymes. Excessive Cu could induce hepatotoxicity in humans and multiple animals. The purpose of this study was to investigate the effects of autophagy machinery on Cu-induced hepatotoxicity. Chicken hepatocytes were cultured in medium in the absence and presence of Cu sulfate (CuSO4 ) (0, 10, 50, and 100 μM) for 0, 6, 12, and 24 h, and in the combination of CuSO4 and N-acetyl-l-cysteine (NAC) (1 mM), rapamycin (10 nM), and 3-methyladenine (3-MA) (5 mM) for 24 h...
March 29, 2018: Chemosphere
https://www.readbyqxmd.com/read/29649100/targeting-the-adenosinergic-axis-in-chronic-lymphocytic-leukemia-a-way-to-disrupt-the-tumor-niche
#12
REVIEW
Tiziana Vaisitti, Francesca Arruga, Silvia Deaglio
Targeting adenosine triphosphate (ATP) metabolism and adenosinergic signaling in cancer is gaining momentum, as increasing evidence is showing their relevance in tumor immunology and biology. Chronic lymphocytic leukemia (CLL) results from the expansion of a population of mature B cells that progressively occupies the bone marrow (BM), the blood, and peripheral lymphoid organs. Notwithstanding significant progress in the treatment of these patients, the cure remains an unmet clinical need, suggesting that novel drugs or drug combinations are needed...
April 12, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29643951/effectiveness-of-surface-cleaning-and-disinfection-in-a-brazilian-healthcare-facility
#13
Aires G Santos-Junior, Adriano M Ferreira, Oleci P Frota, Marcelo A Rigotti, Larissa da S Barcelos, Alvaro Francisco Lopes de Sousa, Denise de Andrade, Odanir G Guerra, Mara C R Furlan
Background: Failures in the processes of cleaning and disinfecting health service surfaces may result in the spread and transfer of pathogens that are often associated with healthcare-related infections and outbreaks. Aims: To assess the effectiveness of environmental surface cleaning and disinfection in a hospital clinic. Method: The study was conducted in a nursing ward with 45 beds. A total of 80 samples from five high-touch surfaces were evaluated before and after cleaning and disinfection, using the following methods: visual inspection, adenosine triphosphate bioluminescence assay, aerobic colony count, Staphylococcus aureus colony count, and evaluation of resistance to methicillin...
2018: Open Nursing Journal
https://www.readbyqxmd.com/read/29643920/mir-33-inhibition-attenuates-the-effect-of-liver-x-receptor-agonist-t0901317-on-expression-of-liver-x-receptor-alpha-in-mice-liver
#14
Abbas Mohammadi, Hossein Fallah, Beydolah Shahouzehi, Hamid Najafipour
BACKGROUND: microRNAs play pivotal roles in metabolism and other aspects of cell biology. microRNA-33 and liver X receptor (LXR) affect lipid metabolism and cholesterol trafficking. In this study, we evaluated effects of co-administration of miR-33 inhibitor and LXR activator on LXR-α and adenosine triphosphate-binding cassette transporter A1 (ABCA1) expression in mice liver. METHODS: Twenty-four mice were randomly allocated into four groups (n = 6). Group 1 mice received standard chow diet without any treatment, group 2 received 30 mg/kg/48 hour LXR agonist (T0901317), group 3 received 1 mg/kg/48 hour in vivo locked nucleic acids (LNA) anti-miR-33 and group 4 received both T0901317 and in vivo LNA anti-miR-33...
November 2017: ARYA Atherosclerosis
https://www.readbyqxmd.com/read/29643173/-mitochondrial-atp-synthase-dimers-spontaneously-associate-due-to-a-long-range-membrane-induced-force
#15
Claudio Anselmi, Karen M Davies, José D Faraldo-Gómez
Adenosine triphosphate (ATP) synthases populate the inner membranes of mitochondria, where they produce the majority of the ATP required by the cell. From yeast to vertebrates, cryoelectron tomograms of these membranes have consistently revealed a very precise organization of these enzymes. Rather than being scattered throughout the membrane, the ATP synthases form dimers, and these dimers are organized into rows that extend for hundreds of nanometers. The rows are only observed in the membrane invaginations known as cristae, specifically along their sharply curved edges...
April 11, 2018: Journal of General Physiology
https://www.readbyqxmd.com/read/29625557/case-report-lactic-acidosis-and-rhabdomyolysis-during-telbivudine-and-tenofovir-treatment-for-chronic-hepatitis-b
#16
Yue Ying, Yue-Kai Hu, Jia-Lin Jin, Ji-Ming Zhang, Wen-Hong Zhang, Yu-Xian Huang
BACKGROUND: Current treatment options for chronic hepatitis B (CHB) are pegylated interferon alpha and nucleoside analogues (NAs). NAs have relatively fewer side effects than interferon alpha, and generally well tolerated. Previously 12.9% of patients on telbivudine treatment were reported to develop severe elevation of serum creatine phosphokinase (CPK) levels, but related clinical disease, like lactic acidosis (LA) and rhabdomyolysis (RM) were rare. The pathophysiology may be mitochondrial toxicity, for the NAs inhibit not only hepatitis B virus (HBV) polymerase, but also the host mitochondrial DNA polymerase γ...
April 6, 2018: BMC Gastroenterology
https://www.readbyqxmd.com/read/29624679/metabolic-effect-of-alkaline-additives-and-guanosine-gluconate-in-storage-solutions-for-red-blood-cells
#17
Angelo D'Alessandro, Julie A Reisz, Rachel Culp-Hill, Herbert Korsten, Robin van Bruggen, Dirk de Korte
BACKGROUND: Over a century of advancements in the field of additive solutions for red blood cell (RBC) storage has made transfusion therapy a safe and effective practice for millions of recipients worldwide. Still, storage in the blood bank results in the progressive accumulation of metabolic alterations, a phenomenon that is mitigated by storage in novel storage additives, such as alkaline additive solutions. While novel alkaline additive formulations have been proposed, no metabolomics characterization has been performed to date...
April 6, 2018: Transfusion
https://www.readbyqxmd.com/read/29623860/adenosine-and-adenosine-5-triphosphate-catabolism-in-systemic-blood-as-a-potential-biomarker-for-doxorubicin-cardiotoxicity-in-an-experimental-rat-model-in-vivo
#18
Pollen K Yeung, Chad Purcell, Fatemeh Akhoundi, Remigus U Agu
BACKGROUND: Previous studies have shown that metabolism of adenosine 5'-triphosphate (ATP) in systemic blood is a potential surrogate biomarker for cardiovascular toxicity. OBJECTIVE: To investigate the acute effect of high dose of doxorubicin (DOX) on adenosine and ATP catabolism in systemic blood in vivo. METHOD: Sprague Dawley (SD) rats were each given either 10 mg/kg of DOX (n = 8) or normal saline (1 mL/kg, n = 11) twice daily for 4 doses by subcutaneous (sc) injection...
April 6, 2018: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/29617450/limb-remote-ischemic-conditioning-of-the-recipient-protects-the-liver-in-a-rat-model-of-arterialized-orthotopic-liver-transplantation
#19
Zoltan Czigany, Christian Bleilevens, Christian Beckers, Christian Stoppe, Michaela Möhring, Andras Fülöp, Attila Szijarto, Georg Lurje, Ulf P Neumann, René H Tolba
BACKGROUND: Ischemic-reperfusion (IR) injury still represents a major concern in clinical transplantation, especially in the era of extreme organ shortage and extended criteria donor organs. In the present study we aimed to investigate the hepatoprotective effects of remote ischemic conditioning (RIC) in a rat model of arterialized orthotopic liver transplantation (OLT). METHODS: Male Lewis rats were used (n = 144 / 72 OLT cases; 240-340g) as donors and recipients...
2018: PloS One
https://www.readbyqxmd.com/read/29610977/a-multifunctional-probe-based-on-the-use-of-labeled-aptamer-and-magnetic-nanoparticles-for-fluorometric-determination-of-adenosine-5-triphosphate
#20
Xiaojie Liu, Bixia Lin, Ying Yu, Yujuan Cao, Manli Guo
A multifunctional fluorescent probe is synthesized for the determination of adenosine 5'-triphosphate (ATP). The 6-carboxyfluorescein-labeled aptamer (FAM-aptamer) was bound to the surface of magnetite nanoparticles coated with polydopamine (Fe3 O4 @PDA) by π-π stacking interaction to form the multifunctional probe. The probe has three functions including recognition, magnetic separation, and yielding a fluorescent signal. In the presence of ATP, FAM-aptamer on the surface of the probe binds to ATP and returns to the solution...
April 2, 2018: Mikrochimica Acta
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