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https://www.readbyqxmd.com/read/28736722/alterations-in-antioxidant-system-mitochondrial-biogenesis-and-autophagy-in-preeclamptic-myometrium
#1
Polina A Vishnyakova, Maria A Volodina, Nadezhda V Tarasova, Maria V Marey, Natalya E Kan, Zulfiya S Khodzhaeva, Mikhail Yu Vysokikh, Gennady T Sukhikh
Preeclampsia is a pregnancy complication which causes significant maternal and fetal morbidity and mortality worldwide. Although intensive research has been performed in the last 40 years, the pathology of preeclampsia is still poorly understood. The present work is a comparative study of the myometrium of women with normal pregnancy, and those with late- and early-onset preeclampsia (n = 10 for each group). We observed significant changes in the levels of antioxidant enzymes, markers of mitochondrial biogenesis and autophagy proteins in preeclamptic myometrium...
December 2017: BBA Clinical
https://www.readbyqxmd.com/read/28736299/n-acetylglucosamine-the-building-block-of-chitin-inhibits-growth-of-neurospora-crassa
#2
Romana Gaderer, Verena Seidl-Seiboth, Ronald P de Vries, Bernhard Seiboth, Lisa Kappel
N-acetylglucosamine (GlcNAc) is the monomer of the polysaccharide chitin, an essential structural component of the fungal cell wall and the arthropod exoskeleton. We recently showed that the genes encoding the enzymes for GlcNAc catabolism are clustered in several ascomycetes. In the present study we tested these fungi for growth on GlcNAc and chitin. All fungi, containing the GlcNAc gene cluster, could grow on GlcNAc with the exception of four independent Neurospora crassa wild-type isolates, which were however able to grow on chitin...
July 20, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28734229/effects-of-dietary-starch-types-on-early-postmortem-muscle-energy-metabolism-in-finishing-pigs
#3
Y J Li, T Gao, J L Li, L Zhang, F Gao, G H Zhou
This study aimed to investigate the effects of different dietary starch types on early postmortem muscle energy metabolism in finishing pigs. Ninety barrows (68.0±2.0kg) were randomly allotted to three experimental diets with five replicates of six pigs, containing pure waxy maize starch (WMS), nonwaxy maize starch (NMS), and pea starch (PS) (amylose/amylopectin were 0.07, 0.19 and 0.28 respectively). Compared with the WMS diet, pigs fed the PS diet exhibited greater creatine kinase activity, higher adenosine triphosphate and adenosine diphosphate contents, lower phosphocreatine (PCr), adenosine monophosphate and glycogen contents, and lower glycolytic potential (P<0...
July 12, 2017: Meat Science
https://www.readbyqxmd.com/read/28733872/metabolic-profiles-of-flooding-tolerant-mechanism-in-early-stage-soybean-responding-to-initial-stress
#4
Xin Wang, Wei Zhu, Akiko Hashiguchi, Minoru Nishimura, Jingkui Tian, Setsuko Komatsu
Metabolomic analysis of flooding-tolerant mutant and abscisic acid-treated soybeans suggests that accumulated fructose might play a role in initial flooding tolerance through regulation of hexokinase and phosphofructokinase. Soybean is sensitive to flooding stress, which markedly reduces plant growth. To explore the mechanism underlying initial-flooding tolerance in soybean, mass spectrometry-based metabolomic analysis was performed using flooding-tolerant mutant and abscisic-acid treated soybeans. Among the commonly-identified metabolites in both flooding-tolerant materials, metabolites involved in carbohydrate and organic acid displayed same profile at initial-flooding stress...
July 21, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28731850/the-diagnostic-accuracy-of-biomarkers-for-diagnosis-of-primary-biliary-cholangitis-pbc-in-anti-mitochondrial-antibody-ama-negative-pbc-patients-a-review-of-literature
#5
Federica de Liso, Caterina Matinato, Mariangela Ronchi, Rita Maiavacca
Primary biliary cholangitis (PBC), also known as primary biliary cirrhosis, is an autoimmune disease of the liver characterized by anti-mitochondrial antibodies (AMA) in 90%-95% of patients. The aim of this study was to evaluate the diagnostic value of several serum biomarkers in patients with PBC but negative for AMA. Some antinuclear antibodies (ANA) pattern, detected by indirect immunofluorescence (IIF), such as multiple nuclear dot (MND) and rim-like patterns are well-known to be specific for PBC. The corresponding nuclear antigens are the components of the nuclear pore complex (Gp210 for rim-like pattern) and Sp100, PML proteins (for MND pattern) detectable by immunoblotting and ELISA methods...
July 21, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28728385/effects-of-dietary-energy-sources-on-early-postmortem-muscle-metabolism-of-finishing-pigs
#6
Yanjiao Li, Changning Yu, Jiaolong Li, Lin Zhang, Feng Gao, Guanghong Zhou
Objective: This study investigated the effects of different dietary energy sources on early postmortem muscle metabolism of finishing pigs. Methods: Seventy-two barrow (Duroc × Landrace × Yorkshire, DLY) pigs (65.0 ± 2.0 kg) were allotted to three iso-energetic and iso-nitrogenous diets: A (44.1% starch, 5.9% crude fat and 12.6% neutral detergent fibre (NDF)), B (37.6% starch, 9.5% crude fat and 15.4% NDF) or C (30.9% starch, 14.3% crude fat and 17.8% NDF). After the duration of 28-day feeding experiment, 24 pigs (eight per treatment) were slaughtered and the M...
June 26, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28726862/a-targeted-delivery-strategy-for-the-development-of-potent-trypanocides
#7
Heeren M Gordhan, Jillian E Milanes, Yijian Qiu, Jennifer E Golden, Kenneth A Christensen, James C Morris, Daniel C Whitehead
A new drug delivery strategy was investigated for the development of potent anti-parasitic compounds against Trypanosoma brucei, the causative agent of African sleeping sickness. Thus, potent in vitro hexokinase inhibitors were rendered cytotoxic by appending a tripeptide peroxosomal targeting sequence that facilitated delivery of the molecular cargo to the appropriate organelle in the parasite.
July 20, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28724379/regulation-of-glucose-uptake-in-lymphoma-cell-lines-by-c-myc-and-pi3k-dependent-signaling-pathways-and-impact-of-glycolytic-pathways-on-cell-viability
#8
Martina Broecker-Preuss, Nina Becher-Boveleth, Andreas Bockisch, Ulrich Dührsen, Stefan Müller
BACKGROUND: Changes in glucose and energy metabolism contribute to the altered phenotype of cancer cells and are the basis for positron emission tomography with (18)F-fluoro-2-deoxy-D-glucose (FDG) to visualize tumors in vivo. The molecular background of the enhanced glucose uptake and its regulation in lymphoma cells is not fully clarified and may provide new possibilities to reverse the altered metabolism. Thus in this study we investigated regulation of glucose uptake by different signaling pathways...
July 19, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28723590/cardioprotective-mitochondrial-binding-by-hexokinase-i-is-induced-by-a-hyperoxic-acute-thermal-insult-in-the-rainbow-trout-oncorhynchus-mykiss
#9
Neal Ingraham Callaghan, Kenneth Javier Williams, Tyson James MacCormack
Due to the substantial photosynthetic biomass in their habitat, salmonids such as the rainbow trout (Oncorhynchus mykiss) can be subject to hyperoxia in addition to high temperatures associated with climate change. Both stressful conditions increase the incidence of damaging reactive oxygen species (ROS). The mitochondrial association of hexokinase has been shown to increase in the hearts of certain fish experiencing hypoxia in a putative cardioprotective response to oxidative stress. In this study, the mitochondrial association of hexokinase I (HKI) and markers of oxidative damage and metabolic stress were probed to elucidate the cardioprotective role of hexokinase in the rainbow trout...
July 16, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28722424/metabolic-study-of-cancer-cells-using-a-ph-sensitive-hydrogel-nanofiber-light-addressable-potentiometric-sensor
#10
Parmiss Mojir Shaibani, Hashem Etayash, Selvaraj Naicker, Kamaljit Kaur, Thomas Thundat
We report a simple, fast, and cost-effective approach that measures cancer cell metabolism and their response to anticancer drugs in real time. Using a Light Addressable Potentiometric Sensor integrated with pH sensitive hydrogel nanofibers (NF-LAPS), we detect localized changes in pH of the media as cancer cells consume glucose and release lactate. NF-LAPS shows a sensitivity response of 74 mV/pH for cancer cells. Cancer cells (MDA MB231) showed a response of ∼0.4 unit change in pH compared to virtually no change observed for normal cells (MCF10A)...
January 27, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28713289/mitochondrial-vdac1-a-key-gatekeeper-as-potential-therapeutic-target
#11
REVIEW
Amadou K S Camara, YiFan Zhou, Po-Chao Wen, Emad Tajkhorshid, Wai-Meng Kwok
Mitochondria are the key source of ATP that fuels cellular functions, and they are also central in cellular signaling, cell division and apoptosis. Dysfunction of mitochondria has been implicated in a wide range of diseases, including neurodegenerative and cardiac diseases, and various types of cancer. One of the key proteins that regulate mitochondrial function is the voltage-dependent anion channel 1 (VDAC1), the most abundant protein on the outer membrane of mitochondria. VDAC1 is the gatekeeper for the passages of metabolites, nucleotides, and ions; it plays a crucial role in regulating apoptosis due to its interaction with apoptotic and anti-apoptotic proteins, namely members of the Bcl-2 family of proteins and hexokinase...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28712506/vdac1-functions-in-ca-2-homeostasis-and-cell-life-and-death-in-health-and-disease
#12
REVIEW
Varda Shoshan-Barmatz, Yakov Krelin, Anna Shteinfer-Kuzmine
In the outer mitochondrial membrane (OMM), the voltage-dependent anion channel 1 (VDAC1) serves as a mitochondrial gatekeeper, controlling the metabolic and energy cross-talk between mitochondria and the rest of the cell. VDAC1 also functions in cellular Ca(2+) homeostasis by transporting Ca(2+) in and out of mitochondria. VDAC1 has also been recognized as a key protein in mitochondria-mediated apoptosis, contributing to the release of apoptotic proteins located in the inter-membranal space (IMS) and regulating apoptosis via association with pro- and anti-apoptotic members of the Bcl-2 family of proteins and hexokinase...
June 23, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28709867/attenuation-of-the-hypoxia-induced-mir-34a-protects-cardiomyocytes-through-maintenance-of-glucose-metabolism
#13
Zai-Cun Wang, Zun-Zhe Wang, Huan-Ju Ma, Chen-Chen Wang, Hua-Ting Wang
Ischemic injury in the heart is associated with death of cardiomyocytes and even after decades of research there is no appropriate therapeutic intervention to treat ischemic injury. The microRNA miR-34a is known to be induced in cardiomyocytes following ischemic injury. Another hallmark of ischemic injury is impaired glycolysis. The objective of the current study was to investigate the effects of short- and long-term exposure to hypoxia on miR-34a expression on apoptosis and regulation of key glycolysis metabolic enzymes...
July 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28704063/evaluation-of-accuracy-of-six-blood-glucose-monitoring-systems-and-modeling-of-possibly-related-insulin-dosing-errors
#14
Annette Baumstark, Nina Jendrike, Stefan Pleus, Cornelia Haug, Guido Freckmann
OBJECTIVE: Self-monitoring of blood glucose (BG) is an essential part of diabetes therapy. Accurate and reliable results from BG monitoring systems (BGMS) are important especially when they are used to calculate insulin doses. This study aimed at assessing system accuracy of BGMS and possibly related insulin dosing errors. RESEARCH DESIGN AND METHODS: System accuracy of six different BGMS (Accu-Chek(®) Aviva Nano, Accu-Chek Mobile, Accu-Chek Performa Nano, CONTOUR(®) NEXT LINK 2...
July 13, 2017: Diabetes Technology & Therapeutics
https://www.readbyqxmd.com/read/28690063/influence-of-food-deprivation-on-intravenous-glucose-tolerance-test-traits-in-holstein-friesian-heifers
#15
L Antonio González-Grajales, Laura Pieper, Joachim Kremer, Rudolf Staufenbiel
Glucose is essential for numerous cellular functions due to its involvement in energy supply from early development to adulthood. In the lactating cow, glucose demands by the mammary gland significantly increase to support milk production when compared with other tissues. Thus, insufficient blood glucose levels might predispose dairy cows to metabolic disturbances. The intravenous glucose tolerance test (ivGTT) is a suitable tool to characterize glucose metabolism and insulin responses, but results must be reliable and repeatable...
July 6, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28689265/aerobic-glycolysis-hypothesis-through-wnt-beta-catenin-pathway-in-exudative-age-related-macular-degeneration
#16
REVIEW
Alexandre Vallée, Yves Lecarpentier, Rémy Guillevin, Jean-Noël Vallée
Exudative age-related macular degeneration (AMD) is characterized by molecular mechanisms responsible for the initiation of choroidal neovascularization (CNV). Inflammatory processes are associated with upregulation of the canonical WNT/beta-catenin pathway in exudative AMD. We focus this review on the link between WNT/beta-catenin pathway activation and neovascular progression in exudative AMD through activation of aerobic glycolysis for production of angiogenic factors. Increased WNT/beta-catenin pathway involves hexokinase 2 (HK2) and pyruvate kinase M2 (PKM2)...
July 8, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28689004/the-role-of-succinate-and-ros-in-reperfusion-injury-a-critical-appraisal
#17
REVIEW
Tatyana N Andrienko, Philippe Pasdois, Gonçalo C Pereira, Matthew J Ovens, Andrew P Halestrap
We critically assess the proposal that succinate-fuelled reverse electron flow (REF) drives mitochondrial matrix superoxide production from Complex I early in reperfusion, thus acting as a key mediator of ischemia/reperfusion (IR) injury. Real-time surface fluorescence measurements of NAD(P)H and flavoprotein redox state suggest that conditions are unfavourable for REF during early reperfusion. Furthermore, rapid loss of succinate accumulated during ischemia can be explained by its efflux rather than oxidation...
July 5, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28679957/socs1-is-a-negative-regulator-of-metabolic-reprogramming-during-sepsis
#18
Annie Rocio Piñeros Alvarez, Nicole Glosson-Byers, Stephanie Brandt, Soujuan Wang, Hector Wong, Sarah Sturgeon, Brian Paul McCarthy, Paul R Territo, Jose Carlos Alves-Filho, C Henrique Serezani
Sepsis can induce an overwhelming systemic inflammatory response, resulting in organ damage and death. Suppressor of cytokine signaling 1 (SOCS1) negatively regulates signaling by cytokine receptors and Toll-like receptors (TLRs). However, the cellular targets and molecular mechanisms for SOCS1 activity during polymicrobial sepsis are unknown. To address this, we utilized a cecal ligation and puncture (CLP) model for sepsis; C57BL/6 mice subjected to CLP were then treated with a peptide (iKIR) that binds the SOCS1 kinase inhibitory region (KIR) and blocks its activity...
July 6, 2017: JCI Insight
https://www.readbyqxmd.com/read/28676637/transcriptomic-profiling-of-melilotus-albus-near-isogenic-lines-contrasting-for-coumarin-content
#19
Kai Luo, Fan Wu, Daiyu Zhang, Rui Dong, Zhichao Fan, Rui Zhang, Zhuanzhuan Yan, Yanrong Wang, Jiyu Zhang
Coumarin and its derivatives are widely used as fragrances in industrial products and have medical value. The goal of the present study was to discover genes and pathways related to coumarin biosynthesis in Melilotus albus using transcriptome analysis. The genes of five M. albus near-isogenic lines (NILs) that had different coumarin content and β-glucosidase activity according to the investigation of pedigree were quantified and then analysed by RNA-Seq. Using transcriptome analysis, differentially expressed genes (DEGs) were identified in two pairwise comparisons that differed in coumarin content as well as in two pairwise comparisons that differed in β-glucosidase activity...
July 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28676080/pharmacokinetic-and-pharmacodynamic-modeling-of-oral-mitiglinide-on-glucose-lowering-in-healthy-chinese-volunteers
#20
Shijia Liu, Peidong Chen, Yang Zhao, Guoliang Dai, Bingting Sun, Yao Wang, Anwei Ding, Wenzheng Ju
BACKGROUND: Mitiglinide is a widely used agent for diabetic treatment. We established a pharmacokinetic-pharmacodynamic (PK-PD) model to illustrate the relationship between mitiglinide plasma concentration and its glucose lowering effects in healthy volunteers. METHODS: The volunteers participated in the test after the administration of a single dose of 10 mg mitiglinide. The drug concentration in Plasma and the values of glucose levels were determined by LC-MS/MS assay and hexokinase method...
July 4, 2017: BMC Pharmacology & Toxicology
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