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L-carnitine

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https://www.readbyqxmd.com/read/28425821/l-carnitine-supplementation-to-reverse-hyperammonemia-in-a-patient-undergoing-chronic-valproic-acid-treatment-a-case-report
#1
Cecilia Maldonado, Natalia Guevara, Alicia Silveira, Pietro Fagiolino, Marta Vázquez
Valproic acid is a broad-spectrum anticonvulsant that has also gained attention in the psychiatric setting. With respect to safety, valproic acid may induce a seemingly rare condition, hyperammonemia, which can induce a wide variety of symptoms ranging from irritability to coma. The proposed mechanism of hyperammonemia involves depletion of carnitine and overproduction of a toxic metabolite, 4-en-valproic acid, both of which impair the urea cycle and thus ammonia elimination. Carnitine is a commonly used antidote for acute intoxication of valproic acid, but is not a therapeutic option for management of chronic adults with adverse effects related to valproic acid...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28424167/rethinking-the-regulation-of-l-carnitine-transport-in-skeletal-muscle-cells-focus-on-the-role-of-ampk
#2
Da Xu, Guofeng You
N/A.
April 19, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28419998/dynamics-of-l-carnitine-in-plasma-and-urine-in-patients-undergoing-cisplatin-chemotherapy
#3
Daisuke Gomi, Aika Tanaka, Toshirou Fukushima, Takashi Kobayashi, Hirohide Matsushita, Nodoka Sekiguchi, Akiyuki Sakamoto, Shigeru Sasaki, Keiko Mamiya, Tomonobu Koizumi
BACKGROUND AND AIMS: Several studies have indicated that cisplatin (cis-diamminedichloroplatinum II; CDDP) causes urinary excretion of L-carnitine (LC). However, the underlying cofactors affecting the increased urinary excretion remain unclear. The present study was performed to evaluate the dynamics of LC in plasma and urine after CDDP chemotherapy and to examine the relations with clinical parameters, such as gender, body mass index (BMI), and renal function. METHODS: Twenty-two patients treated with CDDP therapy were selected...
April 19, 2017: Chemotherapy
https://www.readbyqxmd.com/read/28410798/protective-role-of-coq10-or-l-carnitine-on-the-integrity-of-the-myocardium-in-doxorubicin-induced-toxicity
#4
Hesham N Mustafa, Gehan A Hegazy, Sally A El Awdan, Marawan AbdelBaset
Doxorubicin (DOX) is a chemotherapeutic agent used for treatment of different cancers and its clinical usage is hindered by the oxidative injury-related cardiotoxicity. This work aims to declare if the harmful effects of DOX on heart can be alleviated with the use of Coenzyme Q10 (CoQ10) or L-carnitine. The study was performed on seventy two female Wistar albino rats divided into six groups, 12 animals each: Control group; DOX group (10mg/kg); CoQ10 group (200mg/kg); L-carnitine group (100mg/kg); DOX+CoQ10 group; DOX+L-carnitine group...
April 2, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/28396261/experimental-evidence-of-oxidative-stress-in-patients-with-l-2-hydroxyglutaric-aciduria-and-that-l-carnitine-attenuates-in-vitro-dna-damage-caused-by-d-2-hydroxyglutaric-and-l-2-hydroxyglutaric-acids
#5
Daiane Grigolo Bardemaker Rodrigues, Daniella de Moura Coelho, Ângela Sitta, Carlos Eduardo Diaz Jacques, Tatiane Hauschild, Vanusa Manfredini, Abdellatif Bakkali, Eduard A Struys, Cornelis Jakobs, Moacir Wajner, Carmen Regla Vargas
d-2-hydroxyglutaric (D-2-HGA) and l-2-hydroxyglutaric (L-2-HGA) acidurias are rare neurometabolic disorders biochemically characterized by increased levels of d-2-hydroxyglutaric acid (D-2-HG) and l-2-hydroxyglutaric acid (L-2-HG) respectively, in biological fluids and tissues. These diseases are caused by mutations in the specific enzymes involved in the metabolic pathways of these organic acids. In the present work, we first investigated whether D-2-HG and L-2-HGA could provoke DNA oxidative damage in blood leukocytes and whether l-carnitine (LC) could prevent the in vitro DNA damage induced by these organic acids...
April 7, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28392465/l-carnitine-preserves-cardiac-function-by-activating-p38-mapk-nrf2-signalling-in-hearts-exposed-to-irradiation
#6
Zhigang Fan, Yang Han, Yuanpeng Ye, Chao Liu, Hui Cai
Radiation-induced heart damage (RIHD) is now considered to be one of the causes of mortality in cancer patients undergoing radiotherapy. Cardiac function impairments are clinical manifestations of RIHD. L-carnitine shows protective effects against irradiation and heart disease. This study was aimed to investigate the cardioprotective effects and potential molecular mechanisms of L-carnitine against RIHD. Mouse hearts were exposed to γ-radiation to induce RIHD. L-carnitine at doses of 100mg/Kg and 200mg/Kg was used to treat animals intraperitoneally...
April 6, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28390470/supplementation-of-culture-medium-with-l-carnitine-improves-the-development-and-cryotolerance-of-in-vitro-produced-porcine-embryos
#7
J L Lowe, L K Bartolac, R Bathgate, C G Grupen
Porcine oocytes and embryos contain substantial amounts of lipid, with little known regarding its metabolic role during development. This study investigated the role of lipid metabolism and the interaction between carbohydrate and lipid substrates in porcine embryos. Following in vitro fertilisation, presumptive zygotes were transferred to culture medium supplemented with L-carnitine, a co-factor required for the metabolism of fatty acids. In porcine zygote medium-3 (PZM-3), which contains pyruvate and lactate, 3mM L-carnitine was the only dose that improved cleavage rates compared with the control...
April 10, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28387599/novel-insights-into-systemic-autoimmune-rheumatic-diseases-using-shared-molecular-signatures-and-an-integrative-analysis
#8
Marie Hudson, Sasha Bernatsky, Ines Colmegna, Maximilien Lora, Tomi Pastinen, Kathleen Klein Oros, Celia M T Greenwood
We undertook this study to identify DNA methylation signatures of three systemic autoimmune rheumatic diseases (SARDs), namely rheumatoid arthritis, systemic lupus erythematosus, and systemic sclerosis, compared to healthy controls. Using a careful design to minimize confounding, we restricted our study to subjects with incident disease and performed our analyses on purified CD4(+) T cells, key effector cells in SARD. We identified differentially methylated (using the Illumina Infinium HumanMethylation450 BeadChip array) and expressed (using the Illumina TruSeq stranded RNA-seq protocol) sites between cases and controls, and investigated the biological significance of this SARD signature using gene annotation databases...
April 7, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/28376250/supramolecular-hydrogels-based-on-minimalist-amphiphilic-squaramide-squaramates-for-controlled-release-of-zwitterionic-biomolecules
#9
Antonio Costa, Carlos López, Marta Ximenis, Francisca Orvay, Carmen Rotger
Supramolecular hydrogels with tunable properties have innovative applications in biomedicine, catalysis and materials chemistry. Herein, we have designed minimalist low molecular weight hydrogelators based on squaramide and squaramic acid motifs. Our approach benefits from the high acidity of squaramic acids and the aromaticity of squaramides. Moreover, the substituents on the aryl ring tune the π density of the aryl-squaramide motif. Thus, we successfully prepared materials featuring distinct thermal and mechanical properties...
April 4, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28365301/species-specificity-profiling-of-rat-and-human-organic-cation-carnitine-transporter-slc22a5-slc22a5-octn2-octn2
#10
Kitti Szabó, Zoltán Nagy, Viktória Juhász, Joseph K Zolnerciks, Attila Csorba, Zoltán Tímár, Éva Molnár, Petra Pádár, William Johnson, Erzsébet Beéry, Péter Krajcsi
The purpose of this study was to characterize the uptake of carnitine, the physiological substrate, and the uptake of mildronate, a consensus substrate drug by rat Octn2 and human OCTN2 transporters as well as to characterize drug-mediated inhibition of l-carnitine uptake by the rat and human orthologs overexpressed in CHO-K1 cells. l-carnitine and mildronate were found to be a lower affinity substrate for rat Octn2 (KM = 32.66 ± 5.11 μM and 23.62 ± 4.99 μM respectively) than for human OCTN2 (KM = 3...
August 26, 2016: Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28349514/l-carnitine-for-cognitive-enhancement-in-people-without-cognitive-impairment
#11
REVIEW
Ning Chen, Mi Yang, Muke Zhou, Jing Xiao, Jian Guo, Li He
BACKGROUND: Safe interventions to enhance cognitive function in cognitively healthy people would be very valuable for several reasons, including a better quality of life and professional success. While L-carnitine has been reported to enhance cognitive function in some conditions, its efficacy is disputed. The evidence of its efficacy for cognitively healthy people has not previously been systematically reviewed. OBJECTIVES: To assess the efficacy and safety of L-carnitine for the enhancement of cognitive function in people without cognitive impairment...
March 26, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28346814/nicotinamide-riboside-a-form-of-vitamin-b3-and-nad-precursor-relieves-the-nociceptive-and-aversive-dimensions-of-paclitaxel-induced-peripheral-neuropathy-in-female-rats
#12
Marta V Hamity, Stephanie R White, Roxanne Y Walder, Mark S Schmidt, Charles Brenner, Donna L Hammond
Injury to sensory afferents may contribute to the peripheral neuropathies that develop after administration of chemotherapeutic agents. Manipulations that increase levels of nicotinamide adenine dinucleotide (NAD) can protect against neuronal injury. This study examined whether nicotinamide riboside (NR), a third form of vitamin B3 and precursor of NAD, diminishes tactile hypersensitivity and place escape-avoidance behaviors in a rodent model of paclitaxel-induced peripheral neuropathy. Female Sprague-Dawley rats received 3 intravenous injections of 6...
May 2017: Pain
https://www.readbyqxmd.com/read/28345160/increasing-skeletal-muscle-carnitine-availability-does-not-alter-the-adaptations-to-high-intensity-interval-training
#13
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 2x3 minute bouts of cycling exercise at 100% Wattmax , separated by five minutes rest...
March 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28343218/effect-of-l-carnitine-supplementation-on-reverse-remodeling-in-patients-with-ischemic-heart-disease-undergoing-coronary-artery-bypass-grafting-a-randomized-placebo-controlled-trial
#14
Sheila da Silva Guimarães, Wanise de Souza Cruz, Licinio da Silva, Gabrielle Maciel, Ana Beatriz Huguenin, Monicque de Carvalho, Bárbara Costa, Geisiane da Silva, Carlos da Costa, João Alvaro D'Ippolito, Alexandre Colafranceschi, Fernanda Scalco, Gilson Boaventura
During cardiac failure, cardiomyocytes have difficulty in using the substrates to produce energy. L-carnitine is a necessary nutrient for the transport of fatty acids that are required for generating energy. Coronary artery graft surgery reduces the plasma levels of L-carnitine and increases the oxidative stress. This study demonstrates the effect of L-carnitine supplementation on the reverse remodeling of patients undergoing coronary artery bypass graft. Patients with ischemic heart failure who underwent coronary graft surgery were randomized to group A - supplemented with L-carnitine or group B controls...
March 25, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/28342601/ultra-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry-ms-e-based-untargeted-milk-metabolomics-in-dairy-cows-with-subclinical-or-clinical-mastitis
#15
Xiaomin Xi, Lai-Yu Kwok, Yuenan Wang, Chen Ma, Zhihui Mi, Heping Zhang
In this study, a novel metabolomics technique based on ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry in the MS(E) mode was used to investigate the milk metabolomics of healthy, subclinical, and clinical mastitis cows, which were classified based on somatic cell count and presentation of clinical symptoms. Meanwhile, univariate and multivariate statistical analyses were performed to identify the significant differences across the 3 groups. Compared with healthy milk samples, less glucose, d-glycerol-1-phosphate, 4-hydroxyphenyllactate, l-carnitine, sn-glycero-3-phosphocholine, citrate, and hippurate were detected in the clinical mastitic milk samples, whereas less d-glycerol-1-phosphate, benzoic acid, l-carnitine, and cis-aconitate were found in the subclinical mastitic milk samples...
March 22, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28332552/corrigendum-systemic-regulation-of-l-carnitine-in-nutritional-metabolism-in-zebrafish-danio-rerio
#16
Jia-Min Li, Ling-Yu Li, Xuan Qin, Li-Jun Ning, Dong-Liang Lu, Dong-Liang Li, Mei-Ling Zhang, Xin Wang, Zhen-Yu Du
No abstract text is available yet for this article.
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28317735/l-carnitine-ameliorates-the-oxidative-stress-response-to-angiotensin-ii-by-modulating-nadph-oxidase-through-a-reduction-in-protein-kinase-c-activity-and-nf-%C3%AE%C2%BAb-translocation-to-the-nucleus
#17
Antonio J Blanca, María V Ruiz-Armenta, Sonia Zambrano, José L Miguel-Carrasco, Francisco M González-Roncero, Ana Fortuño, Elisa Revilla, Alfonso Mate, Carmen M Vázquez
l-Carnitine (LC) exerts beneficial effects in arterial hypertension due, in part, to its antioxidant capacity. We investigated the signalling pathways involved in the effect of LC on angiotensin II (Ang II)-induced NADPH oxidase activation in NRK-52E cells. Ang II increased the generation of superoxide anion from NADPH oxidase, as well as the amount of hydrogen peroxide and nitrotyrosine. Co-incubation with LC managed to prevent these alterations and also reverted the changes in NADPH oxidase expression triggered by Ang II...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28315160/modulatory-role-of-l-carnitine-against-microcystin-lr-induced-immunotoxicity-and-oxidative-stress-in-common-carp
#18
Xiu-Mei Chen, Gui-Liang Guo, Li Sun, Qiu-Shi Yang, Gui-Qin Wang, Dong-Ming Zhang
Microcystin-LR (MCLR), one of the most popular microcystins (MCs) found in many field water bodies around the world, poses great health risks to animals and humans. In the present study, healthy common carp (initial weight 24.8 ± 2.3 g) were randomly assigned to five groups. Group I was fed on normal diet as control. Group II was maintained on normal diet and received MCLR intraperitoneal injection (150 μg kg(-1) BW). Common carp in groups III, IV, and V were daily pretreated with L-carnitine (LC) at doses of 0...
March 17, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28314909/localization-of-dynamin-related-protein-1-and-its-potential-role-in-lamellipodia-formation
#19
Youhwa Jo, Hyo Min Cho, Woong Sun, Jae Ryun Ryu
Dynamin-related protein1 (Drp1) plays an essential role in mitochondrial fission: Cytosolic Drp1 is translocated to the mitochondria upon stimulus, and oligomerized Drp1 constricts mitochondria by aid of actin filaments. Drp1 completes the fission process with GTP hydrolysis by its own GTPase activity. The importance of actin filament and its interaction with Drp1 in the mitochondrial fission process have been demonstrated. In this study, we found that Drp1 is enriched in the actin-rich leading edge of lamellipodia of mouse embryonic fibroblasts (MEFs) wherein mitochondria or peroxisomes are absent...
March 17, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28302936/cryotolerance-of-porcine-blastocysts-is-improved-by-treating-in-vitro-matured-oocytes-with-l-carnitine-prior-to-fertilization
#20
Jenna L Lowe, Louise K Bartolac, Roslyn Bathgate, Christopher G Grupen
Sufficient generation of adenosine triphosphate (ATP) by oocytes is critical for fertilization and embryo development. The objective of this study was to determine the effects of supplementing media with L-carnitine, a co-factor required for the metabolism of fatty acids, during the peri-fertilization period on embryo development and energy generation. Firstly, in vitro fertilization (IVM) porcine oocytes were co-incubated with sperm in IVF medium supplemented with 0‒24 mM L-carnitine. The blastocyst formation rate of the control group was greater than those of the L-carnitine groups (P < 0...
March 16, 2017: Journal of Reproduction and Development
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