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https://www.readbyqxmd.com/read/29052321/coenzyme-q10-supplementation-during-in-vitro-maturation-of-bovine-oocytes-bos-taurus-helps-to-preserve-oocyte-integrity-after-vitrification
#1
M Ruiz-Conca, M Vendrell, M Sabés-Alsina, T Mogas, M Lopez-Bejar
Oocyte vitrification causes less cell stress than slow cooling, but cytoskeletal and spindle alterations may occur affecting the oocyte competence. In vitro maturation (IVM) supplementation with different antioxidant molecules has been performed to attenuate this harmful stress. Coenzyme Q10 (CoQ10 ) supplementation has previously shown to have positive effects in bovine and mouse in vitro embryo development. The aim of this study was to evaluate the effects of CoQ10 during bovine oocyte IVM and vitrification...
October 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29051569/the-additive-effects-of-atorvastatin-and-insulin-on-renal-function-and-renal-organic-anion-transporter-3-function-in-diabetic-rats
#2
Laongdao Thongnak, Anchalee Pongchaidecha, Krit Jaikumkao, Varanuj Chatsudthipong, Nipon Chattipakorn, Anusorn Lungkaphin
Hyperglycemia-induced oxidative stress is usually found in diabetic condition. 3-hydroxy-3-methylglutaryl coenzyme-A (HMG-CoA) reductase inhibitors, statins, are widely used as cholesterol-lowering medication with several "pleiotropic" effects in diabetic patients. This study aims to evaluate whether the protective effects of atorvastatin and insulin on renal function and renal organic anion transporter 3 (Oat3) function involve the modulation of oxidative stress and pancreatic function in type 1 diabetic rats...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29051509/the-transcriptional-regulator-ntrc-controls-glucose-6-phosphate-dehydrogenase-expression-and-polyhydroxybutyrate-synthesis-through-nadph-availability-in-herbaspirillum-seropedicae
#3
Euclides Nenga Manuel Sacomboio, Edson Yu Sin Kim, Henrique Leonardo Ruchaud Correa, Paloma Bonato, Fabio de Oliveira Pedrosa, Emanuel Maltempi de Souza, Leda Satie Chubatsu, Marcelo Müller-Santos
The NTR system is the major regulator of nitrogen metabolism in Bacteria. Despite its broad and well-known role in the assimilation, biosynthesis and recycling of nitrogenous molecules, little is known about its role in carbon metabolism. In this work, we present a new facet of the NTR system in the control of NADPH concentration and the biosynthesis of molecules dependent on reduced coenzyme in Herbaspirillum seropedicae SmR1. We demonstrated that a ntrC mutant strain accumulated high levels of polyhydroxybutyrate (PHB), reaching levels up to 2-fold higher than the parental strain...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29048631/autophagy-induction-enhances-tetrandrine-induced-apoptosis-via-the-ampk-mtor-pathway-in-human-bladder-cancer-cells
#4
Bo Kou, Wei Liu, Xu Xu, Yang Yang, Qiuyue Yi, Fengwei Guo, Jianpeng Li, Jinsong Zhou, Qingshan Kou
Tetrandrine, a bisbenzylisoquinoline alkaloid isolated from the roots of Stephania tetrandra is a traditional Chinese medicine and exerts anticancer capacity in various types of cancers. Previous studies have shown that tetrandrine induces apoptosis in bladder cancer cells via activation of the caspase cascade. However, the underlying mechanism has not yet been reported. Autophagy is a cellular process involved in the degradation of broken proteins and aging organelles to maintain homeostasis. Recent studies indicate that autophagy is implicated in cancer therapy...
September 21, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29046224/reprint-of-impact-of-the-corrin-framework-of-vitamin-b12-on-the-electrochemical-carbon-skeleton-rearrangement-in-comparison-to-an-imine-oxime-planar-ligand-tuning-selectivity-in-1-2-migration-of-a-functional-group-by-controlling-electrolysis-potential
#5
Keishiro Tahara, Ling Pan, Ryoko Yamaguchi, Hisashi Shimakoshi, Masaaki Abe, Yoshio Hisaeda
Among the coenzyme B12-dependent enzymes, methylmalonyl-CoA mutase (MMCM) catalyzes the carbon-skeleton rearrangement reaction between R-methylmalonyl-CoA and succinyl-CoA. Diethyl 2-bromomethyl-2-phenylmalonate, an alkyl bromide substrate having two different migrating groups (phenyl and carboxylic ester groups) on the β-carbon, was applied to the electrolysis mediated by a hydrophobic vitamin B12 model complex, heptamethyl cobyrinate perchlorate in this study. The electrolysis of the substrate at -1.0V vs...
September 29, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29046209/-paroxysmal-muscle-weakness-liver-enlargement-and-hypoglycemia-in-a-boy
#6
Ya-Jie Cui, Chun-Lan Song, Yi-Bing Cheng
A boy aged 11 years was admitted due to intermittent weakness and difficulty in walking for 6 years, and hepatomegaly, glycopenia and unconsciousness for 4 years. The laboratory examinations showed severe metabolic acidosis, hypoglycemia, and abnormal liver function. CT scan showed marked liver enlargement with fat density shadow. The boy was given fluid infusion, correction of acidosis, intravenous injection of glucose, L-carnitine, compound vitamin B, and coenzyme Q10, but he was in a persistent coma and it was difficult to correct refractory metabolic acidosis and hypoglycemia...
October 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29044765/a-novel-inborn-error-of-the-coenzyme-q10-biosynthesis-pathway-cerebellar-ataxia-and-static-encephalomyopathy-due-to-coq5-c-methyltransferase-deficiency
#7
May Christine V Malicdan, Thierry Vilboux, Bruria Ben-Zeev, Jennifer Guo, Aviva Eliyahu, Ben Pode-Shakked, Amir Dori, Sravan Kakani, Settara C Chandrasekharappa, Carlos Ferreira, Natalia Shelestovich, Dina Marek-Yagel, Hadass Pri-Chen, Ilan Blatt, John E Niederhuber, Langping He, Camilo Toro, Robert W Taylor, John Deeken, Tal Yardeni, Douglas C Wallace, William A Gahl, Yair Anikster
Primary coenzyme Q10 (CoQ10 ; MIM# 607426) deficiencies are an emerging group of inherited mitochondrial disorders with heterogonous clinical phenotypes. Over a dozen genes are involved in the biosynthesis of CoQ10 , and mutations in several of these are associated with human disease. However, mutations in COQ5 (MIM# 616359), catalyzing the only C-methylation in the CoQ10 synthetic pathway, have not been implicated in human disease. Here, we report three female siblings of Iraqi-Jewish descent, who had varying degrees of cerebellar ataxia, encephalopathy, generalized tonic-clonic seizures and cognitive disability...
October 16, 2017: Human Mutation
https://www.readbyqxmd.com/read/29042506/non-watson-crick-rna-synthesis-suited-to-origin-functions
#8
Deepa Puthenvedu, Irene Majerfeld, Michael Yarus
A templated RNA synthesis is characterized in which G5'pp5'G accelerates synthesis of A5'pp5'A from pA and chemically activated ImpA precursors. Similar acceleration is not observable in the presence of UppU, CppC, AppG, AppA or pG alone. Thus, it seems likely that AppA is templated by GppG via a form or forms of G:A base-pairing. AppA also appears, more slowly, via a previously known untemplated 2nd order chemical route. Such AppA synthesis requires only ordinary near-neutral solutions containing monovalent and divalent salts, and rates are only slightly sensitive to variation in pH...
October 17, 2017: RNA
https://www.readbyqxmd.com/read/29035673/extracellular-pyridine-nucleotides-as-immune-elicitors-in-arabidopsis
#9
Zhonglin Mou
The pyridine nucleotides nicotinamide adenine dinucleotide (NAD) and NAD phosphate (NADP) are coenzymes that function in both metabolic reactions and intracellular signaling. Emerging evidence from animal research indicates that NAD(P) also acts in the extracellular space (ECS). We have shown in the model plant Arabidopsis that (1) exogenous NAD(P) induces immune responses, (2) pathogen infection causes leakage of intracellular NAD(P) into the extracellular fluid at concentrations sufficient to induce immune responses, and (3) removal of extracellular NAD(P) [eNAD(P)] by expressing the human NAD(P)-metabolizing ectoenzyme CD38 partially compromises systemic acquired resistance...
October 16, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29034944/power-of-protein-trna-functional-assembly-against-aberrant-aggregation
#10
Charles Bou-Nader, Ludovic Pecqueur, David Cornu, Murielle Lombard, Manuela Dezi, Magali Nicaise, Christophe Velours, Marc Fontecave, Djemel Hamdane
Understanding the mechanisms of protein oligomerization and aggregation is a major concern for biotechnology and medical purposes. However, significant challenges remain in determining the mechanism of formation of these superstructures and the environmental factors that can precisely modulate them. Notably the role that a functional ligand plays in the process of protein aggregation is largely unexplored. We herein address these issues with an original flavin-dependent RNA methyltransferase (TrmFO) used as a protein model since this protein employs a complex set of cofactors and ligands for catalysis...
October 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29033963/convergent-evolution-of-pathogen-effectors-toward-reactive-oxygen-species-signaling-networks-in-plants
#11
REVIEW
Nam-Soo Jwa, Byung Kook Hwang
Microbial pathogens have evolved protein effectors to promote virulence and cause disease in host plants. Pathogen effectors delivered into plant cells suppress plant immune responses and modulate host metabolism to support the infection processes of pathogens. Reactive oxygen species (ROS) act as cellular signaling molecules to trigger plant immune responses, such as pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) and effector-triggered immunity. In this review, we discuss recent insights into the molecular functions of pathogen effectors that target multiple steps in the ROS signaling pathway in plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29033952/essential-role-for-ethanolamine-plasmalogen-hydrolysis-in-bacterial-lipopolysaccharide-priming-of-macrophages-for-enhanced-arachidonic-acid-release
#12
Luis Gil-de-Gómez, Alma M Astudillo, Patricia Lebrero, María A Balboa, Jesús Balsinde
Due to their high content in esterified arachidonic acid (AA), macrophages provide large amounts of eicosanoids during innate immune reactions. Bacterial lipopolysaccharide (LPS) is a poor trigger of AA mobilization in macrophages but does have the capacity to prime these cells for greatly increased AA release upon subsequent stimulation. In this work, we have studied molecular mechanisms underlying this phenomenon. By using mass spectrometry-based lipidomic analyses, we show in this work that LPS-primed zymosan-stimulated macrophages exhibit an elevated consumption of a particular phospholipid species, i...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29033916/contribution-of-ruminal-fungi-archaea-protozoa-and-bacteria-to-the-methane-suppression-caused-by-oilseed-supplemented-diets
#13
Shaopu Wang, Katrin Giller, Michael Kreuzer, Susanne E Ulbrich, Ueli Braun, Angela Schwarm
Dietary lipids can suppress methane emission from ruminants, but effects are variable. Especially the role of bacteria, archaea, fungi and protozoa in mediating the lipid effects is unclear. In the present in vitro study, archaea, fungi and protozoa were selectively inhibited by specific agents. This was fully or almost fully successful for fungi and protozoa as well as archaeal activity as determined by the methyl-coenzyme M reductase alpha subunit gene. Five different microbial treatments were generated: rumen fluid being intact (I), without archaea (-A), without fungi (-F), without protozoa (-P) and with bacteria only (-AFP)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29032433/diffuse-mesangial-sclerosis-in-a-pdss2-mutation-induced-coenzyme-q10-deficiency
#14
Béla Iványi, Gábor Z Rácz, Péter Gál, Kitti Brinyiczki, István Bódi, Tibor Kalmár, Zoltán Maróti, Csaba Bereczki
BACKGROUND: A 7-month-old male infant was admitted because he was suffering from nephrotic syndrome, along with encephalomyopathy, hypertrophic cardiomyopathy, clinically suspected deafness and retinitis pigmentosa, and an elevated serum lactate level. METHODS: Coenzyme Q10 supplementation was started because of the clinical suspicion of primary CoQ10 deficiency. Despite intensive efforts, he passed away 4 weeks after admission. RESULTS: The results of genetic tests, available postmortem, explored two hitherto undescribed mutations in the PDSS2 gene...
October 14, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29031737/the-evolution-of-the-genetic-code-impasses-and-challenges
#15
REVIEW
Ádám Kun, Ádám Radványi
The origin of the genetic code and translation is a "notoriously difficult problem". In this survey we present a list of questions that a full theory of the genetic code needs to answer. We assess the leading hypotheses according to these criteria. The stereochemical, the coding coenzyme handle, the coevolution, the four-column theory, the error minimization and the frozen accident hypotheses are discussed. The integration of these hypotheses can account for the origin of the genetic code. But experiments are badly needed...
October 11, 2017: Bio Systems
https://www.readbyqxmd.com/read/29027135/does-coenzyme-q10-supplementation-mitigate-statin-associated-muscle-symptoms-pharmacological-and-methodological-considerations
#16
REVIEW
Beth A Taylor
Statin drugs markedly reduce low-density lipoprotein cholesterol and consequently the incidence of cardiac events. In approximately 5-10% of adults, these drugs are associated with a range of muscle side effects such as muscle pain, cramping and weakness. Reduction in mitochondrial coenzyme Q10 (CoQ10), or ubiquinone, has been proposed as a mechanism for these statin-associated muscle symptoms (SAMS), and thus various formulations of CoQ10 are marketed and consumed for the prevention and treatment of SAMS. However, data supporting the efficacy of CoQ10 are equivocal, with some studies showing that CoQ10 supplementation reduces the incidence and severity of SAMS and others finding no beneficial effects of supplementation...
October 12, 2017: American Journal of Cardiovascular Drugs: Drugs, Devices, and Other Interventions
https://www.readbyqxmd.com/read/29026195/characterization-of-fluorescein-arsenical-hairpin-flash-as-a-probe-for-single-molecule-fluorescence-spectroscopy
#17
Dennis D Fernandes, Jasbir Bamrah, Senthilkumar Kailasam, Gregory-Neal W Gomes, Yuchong Li, Hans-Joachim Wieden, Claudiu C Gradinaru
In recent years, new labelling strategies have been developed that involve the genetic insertion of small amino-acid sequences for specific attachment of small organic fluorophores. Here, we focus on the tetracysteine FCM motif (FLNCCPGCCMEP), which binds to fluorescein arsenical hairpin (FlAsH), and the ybbR motif (TVLDSLEFIASKLA) which binds fluorophores conjugated to Coenzyme A (CoA) via a phosphoryl transfer reaction. We designed a peptide containing both motifs for orthogonal labelling with FlAsH and Alexa647 (AF647)...
October 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29025976/olea-glu117-is-key-to-condensation-of-two-fatty-acyl-coenzyme-a-substrates-in-long-chain-olefin-biosynthesis
#18
Matthew R Jensen, Brandon R Goblirsch, James K Christenson, Morgan A Esler, Fatuma A Mohamed, Lawrence P Wackett, Carrie M Wilmot
In the interest of decreasing dependence on fossil fuels, microbial hydrocarbon biosynthesis pathways are being studied for renewable, tailored production of specialty chemicals and biofuels. One candidate is long-chain olefin biosynthesis, a widespread bacterial pathway that produces waxy hydrocarbons. Found in three- and four-gene clusters, oleABCD encode the enzymes necessary to produce cis -olefins that differ by alkyl chain length, degree of unsaturation, and alkyl chain branching. The first enzyme in the pathway, OleA, catalyzes the Claisen condensation of two fatty acyl-coenzyme A molecules to form a β-keto acid...
October 12, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/29025968/activation-of-ampk-mtorc1-mediated-autophagy-by-metformin-reverses-clk1-deficiency-sensitized-dopaminergic-neuronal-death
#19
Qiuting Yan, Chaojun Han, Guanghui Wang, John L Waddington, Longtai Zheng, Xuechu Zhen
The autophagy-lysosome pathway (ALP) plays a critical role in the pathology of Parkinson's disease (PD). Clk1 (coq7) is a mitochondrial hydroxylase that is essential for Coenzyme Q (ubiquinone) biosynthesis. We have reported previously that Clk1 regulates microglia activation via modulating microglia metabolic reprogramming, which contributes to dopaminergic neuronal survival. This study explored the direct effect of Clk1 on dopaminergic neuronal survival. We demonstrated that Clk1 deficiency inhibited dopaminergic neuronal autophagy in cultured MN9D dopaminergic neurons and in SNc of Clk+/- mutant mice and consequently sensitized dopaminergic neuron damage and behavioral defects...
October 12, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/29022907/p38%C3%AE-mapk-antagonizing-jnk-to-control-the-hepatic-fat-accumulation-in-pediatric-patients-onset-intestinal-failure
#20
Yongtao Xiao, Jun Wang, Weihui Yan, Kejun Zhou, Yi Cao, Wei Cai
The p38α mitogen-activated protein kinase (MAPK) has been related to gluconeogenesis and lipid metabolism. However, the roles and related mechanisms of p38α MAPK in intestinal failure (IF)-associated liver steatosis remained poor understood. Here, our experimental evidence suggested that p38α MAPK significantly suppressed the fat accumulation in livers of IF patients mainly through two mechanisms. On the one hand, p38α MAPK increased hepatic bile acid (BA) synthesis by upregulating the expression of the rate-limiting enzyme cholesterol 7-α-hydroxylase (CYP7A1) and peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), which in turn activated the transcription of the CYP7A1...
October 12, 2017: Cell Death & Disease
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