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acetylcarnitine

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https://www.readbyqxmd.com/read/28591636/n-acyl-taurines-and-acylcarnitines-cause-an-imbalance-in-insulin-synthesis-and-secretion-provoking-%C3%AE-cell-dysfunction-in-type-2-diabetes
#1
Michaela Aichler, Daniela Borgmann, Jan Krumsiek, Achim Buck, Patrick E MacDonald, Jocelyn E Manning Fox, James Lyon, Peter E Light, Susanne Keipert, Martin Jastroch, Annette Feuchtinger, Nikola S Mueller, Na Sun, Andrew Palmer, Theodore Alexandrov, Martin Hrabe de Angelis, Susanne Neschen, Matthias H Tschöp, Axel Walch
The processes contributing to β cell dysfunction in type 2 diabetes (T2D) are uncertain, largely because it is difficult to access β cells in their intact immediate environment. We examined the pathophysiology of β cells under T2D progression directly in pancreatic tissues. We used MALDI imaging of Langerhans islets (LHIs) within mouse tissues or from human tissues to generate in situ-omics data, which we supported with in vitro experiments. Molecular interaction networks provided information on functional pathways and molecules...
June 6, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28537102/cisplatin-induced-metabolome-changes-in-serum-an-experimental-approach-to-identify-markers-for-ototoxicity
#2
Pernilla Videhult Pierre, Jakob Haglöf, Birgitta Linder, Mikael K R Engskog, Torbjörn Arvidsson, Curt Pettersson, Anette Fransson, Göran Laurell
BACKGROUND: Ototoxicity from treatment with the anticancer drug cisplatin remains a clinical problem. A wide range of intracellular targets of cisplatin has been found in vivo. AIM: To investigate cisplatin-induced change of the serum metabolite profile and its association with ototoxicity. MATERIAL AND METHODS: Guinea pigs (n = 14) were treated with cisplatin (8 mg/kg b.w., i.v.) 30 min after administration of the otoprotector candidate sodium thiosulfate (group STS; n = 7) or sodium chloride (group NaCl; n = 7)...
May 24, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28496060/rapid-detection-of-small-molecule-metabolites-in-serum-of-hepatocellular-carcinoma-patients-using-ultrafast-liquid-chromatography-ion-trap-time-of-flight-tandem-mass-spectrometry
#3
Hui Li, Su-Fang Fan, Yan Wang, Shi-Gang Shen, Dian-Xing Sun
A method was developed for analyzing broad spectrum small molecule metabolites in the serum of hepatocellular carcinoma (HCC) patients based on ultrafast liquid chromatography-ion trap-time of flight tandem mass spectrometry (UFLC-IT-TOF MS). Serum samples were collected from 80 HCC patients and healthy persons. After pretreatment process for protein precipitation, the supernatant was analyzed with the UFLC-IT-TOF MS to obtain information on the metabonomics of small molecules. The eight compounds of glycocholic acid, choline glycerophosphate, acetyl-L-phenylalanine, oleamide, tetradecanamide, acetylcarnitine, lysolecithin and glycochenodeoxycholic acid in the HCC group were identified with significant differences from those in the health group (P <0...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28473603/increased-hepatic-mitochondrial-fa-oxidation-leads-to-lower-tg-levels-in-rat-liver-and-plasma-and-is-associated-with-upregulation-of-uncoupling-proteins-and-downregulation-of-apolipoprotein-c-iii
#4
Carine Lindquist, Bodil Bjørndal, Christine Renate Rossmann, Deusdedit Tusubira, Asbjørn Svardal, Gro Vatne Røsland, Karl Johan Tronstad, Seth Hallström, Rolf Kristian Berge
Hepatic mitochondrial function, APOC-III and LPL are potential targets for TG lowering drugs. After three weeks of dietary treatment with the compound 2-(tridec-12 -yn-1-ylthio) acetic acid (1-triple TTA), the hepatic mitochondrial FA oxidation increased more than 5-fold in male Wistar rats. Gene expression analysis in liver showed significant downregulation of APOC-III, and upregulation of LPL and the VLDL receptor. This led to lower hepatic (53 %) and plasma (73 %) TG levels. Concomitantly liver-specific biomarkers related to mitochondrial biogenesis and function (mitochondrial DNA, citrate synthase activity and cytochrome c and Tfam gene expression) were elevated...
May 4, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28396151/increased-urine-acylcarnitines-in-diabetic-apoe-mice-hydroxytetradecadienoylcarnitine-c14-2-oh-reflects-diabetic-nephropathy-in-a-context-of-hyperlipidemia
#5
Koryun Mirzoyan, Kristaps Klavins, Therese Koal, Marion Gillet, Dimitri Marsal, Colette Denis, Julie Klein, Jean-Loup Bascands, Joost P Schanstra, Jean-Sébastien Saulnier-Blache
Hyperlipidemia is a risk factor for initiation and progression of diabetic nephropathy but the metabolic pathways altered in the diabetic kidney in a context of hyperlipidemia remain incompletely described. Assuming that changes in urine composition reflect the alteration of renal metabolism and function, we analyzed the urine metabolite composition of diabetic (streptozotocin-treatment) and control (non diabetic) ApoE-/- mice fed a high cholesterol diet using targeted quantitative metabolomics. Urine metabolome was also compared to the plasma metabolome of the same animals...
May 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28389631/metabolic-profiling-and-novel-plasma-biomarkers-for-predicting-survival-in-epithelial-ovarian-cancer
#6
Hongyu Xie, Yan Hou, Jinlong Cheng, Margarita S Openkova, Bairong Xia, Wenjie Wang, Ang Li, Kai Yang, Junnan Li, Huan Xu, Chunyan Yang, Libing Ma, Zhenzi Li, Xin Fan, Kang Li, Ge Lou
Epithelial ovarian cancer (EOC) is one of the most lethal gynecological malignancies around the world, and patients with ovarian cancer always have an extremely poor chance of survival. Therefore, it is meaningful to develop a highly efficient model that can predict the overall survival for EOC. In order to investigate whether metabolites could be used to predict the survival of EOC, we performed a metabolic analysis of 98 plasma samples with follow-up information, based on the ultra-performance liquid chromatography mass spectrometry (UPLC/MS) systems in both positive (ESI+) and negative (ESI-) modes...
May 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28345160/increasing-skeletal-muscle-carnitine-availability-does-not-alter-the-adaptations-to-high-intensity-interval-training
#7
Christopher E Shannon, Reza Ghasemi, Paul L Greenhaff, Francis B Stephens
Increasing skeletal muscle carnitine availability alters muscle metabolism during steady-state exercise in healthy humans. We investigated whether elevating muscle carnitine, and thereby the acetyl-group buffering capacity, altered the metabolic and physiological adaptations to 24 weeks of high-intensity interval training (HIIT) at 100% maximal exercise capacity (Wattmax ). Twenty-one healthy male volunteers (age 23±2 years; BMI 24.2±1.1 kg/m(2) ) performed 2 × 3 minute bouts of cycling exercise at 100% Wattmax , separated by 5 minutes of rest...
March 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28326943/analgesia-induced-by-the-epigenetic-drug-l-acetylcarnitine-outlasts-the-end-of-treatment-in-mouse-models-of-chronic-inflammatory-and-neuropathic-pain
#8
Serena Notartomaso, Giada Mascio, Matteo Bernabucci, Cristina Zappulla, Pamela Scarselli, Milena Cannella, Tiziana Imbriglio, Roberto Gradini, Giuseppe Battaglia, Valeria Bruno, Ferdinando Nicoletti
Background L-acetylcarnitine, a drug marketed for the treatment of chronic pain, causes analgesia by epigenetically up-regulating type-2 metabotropic glutamate (mGlu2) receptors in the spinal cord. Because the epigenetic mechanisms are typically long-lasting, we hypothesized that analgesia could outlast the duration of L-acetylcarnitine treatment in models of inflammatory and neuropathic pain. Results A seven-day treatment with L-acetylcarnitine (100 mg/kg, once a day, i.p.) produced an antiallodynic effect in the complete Freund adjuvant mouse model of chronic inflammatory pain...
January 2017: Molecular Pain
https://www.readbyqxmd.com/read/28287417/the-effect-of-chinese-herbal-medicine-formula-mkg-on-allergic-asthma-by-regulating-lung-and-plasma-metabolic-alternations
#9
Meng Yu, Hong-Mei Jia, Feng-Xia Cui, Yong Yang, Yang Zhao, Mao-Hua Yang, Zhong-Mei Zou
Asthma is a chronic inflammatory disorder of the airway and is characterized by airway remodeling, hyperresponsiveness, and shortness of breath. Modified Kushen Gancao Formula (mKG), derived from traditional Chinese herbal medicines (TCM), has been demonstrated to have good therapeutic effects on experimental allergic asthma. However, its anti-asthma mechanism remains currently unknown. In the present work, metabolomics studies of biochemical changes in the lung tissue and plasma of ovalbumin (OVA)-induced allergic asthma mice with mKG treatment were performed using ultra high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MS)...
March 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28195849/detection-and-alterations-of-acetylcarnitine-in-human-skeletal-muscles-by-1h-mrs-at-7-t
#10
Radka Klepochová, Ladislav Valkovič, Martin Gajdošík, Thomas Hochwartner, Harald Tschan, Michael Krebs, Siegfried Trattnig, Martin Krššák
OBJECTIVES: The aims of this study were to detect the acetylcarnitine resonance line at 2.13 ppm in the human vastus lateralis and soleus muscles, assess T1 and T2 relaxation times, and investigate the diurnal and exercise-related changes in absolute concentration noninvasively, using proton magnetic resonance spectroscopy at 7 T. MATERIALS AND METHODS: All measurements were performed on a 7 T whole-body Magnetom MR system with a 28-channel knee coil. Five healthy, moderately trained volunteers participated in the assessment of the detectability, repeatability, and relaxation times of acetylcarnitine...
July 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28122782/a-metabolomic-study-of-biomarkers-of-meat-and-fish-intake
#11
William Cheung, Pekka Keski-Rahkonen, Nada Assi, Pietro Ferrari, Heinz Freisling, Sabina Rinaldi, Nadia Slimani, Raul Zamora-Ros, Milena Rundle, Gary Frost, Helena Gibbons, Eibhlin Carr, Lorraine Brennan, Amanda J Cross, Valeria Pala, Salvatore Panico, Carlotta Sacerdote, Domenico Palli, Rosario Tumino, Tilman Kühn, Rudolf Kaaks, Heiner Boeing, Anna Floegel, Francesca Mancini, Marie-Christine Boutron-Ruault, Laura Baglietto, Antonia Trichopoulou, Androniki Naska, Philippos Orfanos, Augustin Scalbert
Background: Meat and fish intakes have been associated with various chronic diseases. The use of specific biomarkers may help to assess meat and fish intake and improve subject classification according to the amount and type of meat or fish consumed.Objective: A metabolomic approach was applied to search for biomarkers of meat and fish intake in a dietary intervention study and in free-living subjects from the European Prospective Investigation into Cancer and Nutrition (EPIC) study.Design: In the dietary intervention study, 4 groups of 10 subjects consumed increasing quantities of chicken, red meat, processed meat, and fish over 3 successive weeks...
March 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28026116/hyperpolarized-13-c-acetate-to-acetylcarnitine-imaging-correction-of-acetate-transport-into-mitochondria
#12
Ulrich Koellisch, Concetta V Gringeri, Rolf F Schulte, Axel Haase
No abstract text is available yet for this article.
January 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27956466/plasma-amino-acid-levels-are-elevated-in-young-healthy-low-birth-weight-men-exposed-to-short-term-high-fat-overfeeding
#13
Amalie Ribel-Madsen, Lars I Hellgren, Charlotte Brøns, Rasmus Ribel-Madsen, Christopher B Newgard, Allan A Vaag
Low birth weight (LBW) individuals exhibit a disproportionately increased, incomplete fatty acid oxidation and a decreased glucose oxidation, compared with normal birth weight (NBW) individuals, and furthermore have an increased risk of developing insulin resistance and type 2 diabetes. We hypothesized that changes in amino acid metabolism may occur parallel to alterations in fatty acid and glucose oxidation, and could contribute to insulin resistance. Therefore, we measured fasting plasma levels of 15 individual or pools of amino acids in 18 LBW and 25 NBW men after an isocaloric control diet and after a 5-day high-fat, high-calorie diet...
December 2016: Physiological Reports
https://www.readbyqxmd.com/read/27898008/research-on-the-relationships-between-endogenous-biomarkers-and-exogenous-toxic-substances-of-acute-toxicity-in-radix-aconiti
#14
Haonan Zhou, Pengjie Zhang, Zhiguo Hou, Jiabin Xie, Yuming Wang, Bin Yang, Yanyan Xu, Yubo Li
Radix Aconiti, a classic traditional Chinese medicine (TCM), has been widely used throughout China for disease treatment due to its various pharmacological activities, such as anti-inflammatory, cardiotonic, and analgesic effects. However, improper use of Radix Aconiti often generated severe acute toxicity. Currently, research on the toxic substances of Radix Aconiti is not rare. In our previous study, acute toxic biomarkers of Radix Aconiti have been found. However, few studies were available to find the relationships between these endogenous biomarkers and exogenous toxic substances...
November 25, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27895387/retention-of-acetylcarnitine-in-chronic-kidney-disease-causes-insulin-resistance-in-skeletal-muscle
#15
Yasunori Miyamoto, Teruo Miyazaki, Akira Honda, Homare Shimohata, Kouichi Hirayama, Masaki Kobayashi
Insulin resistance occurs frequently in patients with chronic kidney disease. However, the mechanisms of insulin resistance associated with chronic kidney disease are unclear. It is known that an increase in the mitochondrial acetyl-CoA (AcCoA)/CoA ratio causes insulin resistance in skeletal muscle, and this ratio is regulated by carnitine acetyltransferase that exchanges acetyl moiety between CoA and carnitine. Because excess acetyl moiety of AcCoA is excreted in urine as acetylcarnitine, we hypothesized that retention of acetylcarnitine might be a cause of insulin resistance in chronic kidney disease patients...
November 2016: Journal of Clinical Biochemistry and Nutrition
https://www.readbyqxmd.com/read/27851872/hyperpolarized-13-c-acetate-to-acetylcarnitine-imaging-correction-of-acetate-transport-into-mitochondria
#16
Ulrich Koellisch, Concetta V Gringeri, Rolf F Schulte, Axel Haase
No abstract text is available yet for this article.
November 10, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27591119/efficacy-of-bezafibrate-on-fibroblasts-of-glutaric-acidemia-type-ii-patients-evaluated-using-an-in-vitro-probe-acylcarnitine-assay
#17
Kenji Yamada, Hironori Kobayashi, Ryosuke Bo, Jamiyan Purevsuren, Yuichi Mushimoto, Tomoo Takahashi, Yuki Hasegawa, Takeshi Taketani, Seiji Fukuda, Seiji Yamaguchi
INTRODUCTION: We evaluated the effects of bezafibrate (BEZ) on β-oxidation in fibroblasts obtained from patients with glutaric acidemia type II (GA2) of various clinical severities using an in vitro probe (IVP) assay. METHODS: Cultured fibroblasts from 12 patients with GA2, including cases of the neonatal-onset type both with and without congenital anomalies (the prenatal- and neonatal-onset forms, respectively), the infantile-onset, and the myopathic forms, were studied...
January 2017: Brain & Development
https://www.readbyqxmd.com/read/27530300/inflammation-in-adult-women-with-a-history-of-child-maltreatment-the-involvement-of-mitochondrial-alterations-and-oxidative-stress
#18
Christina Boeck, Alexandra Maria Koenig, Katharina Schury, Martha Leonie Geiger, Alexander Karabatsiakis, Sarah Wilker, Christiane Waller, Harald Gündel, Jörg Michael Fegert, Enrico Calzia, Iris-Tatjana Kolassa
The experience of maltreatment during childhood is associated with chronic low-grade inflammation in adulthood. However, the molecular mechanisms underlying this pro-inflammatory phenotype remain unclear. Mitochondria were recently found to principally coordinate inflammatory processes via both inflammasome activation and inflammasome-independent pathways. To this end, we hypothesized that alterations in immune cell mitochondrial functioning and oxidative stress might be at the interface between the association of maltreatment experiences during childhood and inflammation...
September 2016: Mitochondrion
https://www.readbyqxmd.com/read/27471436/treatment-of-lean-and-diet-induced-obesity-dio-mice-with-a-novel-stable-obestatin-analogue-alters-plasma-metabolite-levels-as-detected-by-untargeted-lc-ms-metabolomics
#19
Elaine Cowan, Praveen Kumar, Kerry J Burch, David J Grieve, Brian D Green, Stewart F Graham
INTRODUCTION: Obestatin is a controversial gastrointestinal peptide purported to have metabolic actions. OBJECTIVES: This study investigated whether treatment with a stable obestatin analogue (PEG-OB(Cys(10), Cys(13))) changed plasma metabolite levels firstly in lean and subsequently in diet-induced obesity (DIO) C57BL6/J mice. METHODS: Untargeted LC-HRMS metabolomics experiments were carried out in ESI + mode with plasma extracts from both groups of animals...
2016: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/27240302/quantitative-analysis-of-amino-acids-and-acylcarnitines-combined-with-untargeted-metabolomics-using-ultra-high-performance-liquid-chromatography-and-quadrupole-time-of-flight-mass-spectrometry
#20
Cynthia Roy, Pierre-Yves Tremblay, Jean-François Bienvenu, Pierre Ayotte
Metabolomics is an "omic" technique being increasingly used in epidemiological and clinical studies. We developed a method combining untargeted metabolomics with the quantitative determination of eight amino acids (AA) and eight acylcarnitines (AC) in plasma using ultra-high pressure liquid chromatography (UHPLC), electrospray ionization (ESI) and quadrupole time-of-flight mass spectrometry (QTOFMS). Separation of metabolites is performed by ion-pair reverse phase UHPLC using a HSS T3 column (2.1×100mm, 100Å, 1...
August 1, 2016: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
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