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https://www.readbyqxmd.com/read/29054837/altered-metabolic-landscape-in-idh-mutant-gliomas%C3%A2-affects-phospholipid-energy-and-oxidative-stress-pathways
#1
Fred Fack, Saverio Tardito, Guillaume Hochart, Anais Oudin, Liang Zheng, Sabrina Fritah, Anna Golebiewska, Petr V Nazarov, Amandine Bernard, Ann-Christin Hau, Olivier Keunen, William Leenders, Morten Lund-Johansen, Jonathan Stauber, Eyal Gottlieb, Rolf Bjerkvig, Simone P Niclou
Heterozygous mutations in NADP-dependent isocitrate dehydrogenases (IDH) define the large majority of diffuse gliomas and are associated with hypermethylation of DNA and chromatin. The metabolic dysregulations imposed by these mutations, whether dependent or not on the oncometabolite D-2-hydroxyglutarate (D2HG), are less well understood. Here, we applied mass spectrometry imaging on intracranial patient-derived xenografts of IDH-mutant versus IDH wild-type glioma to profile the distribution of metabolites at high anatomical resolution in situ This approach was complemented by in vivo tracing of labeled nutrients followed by liquid chromatography-mass spectrometry (LC-MS) analysis...
October 20, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/29054823/characterization-and-expression-analysis-of-a-new-small-heat-shock-protein-hsp20-4-from-eimeria-tenella
#2
Hongyu Han, Yan Yan, Hui Dong, Shunhai Zhu, Qiping Zhao, Qi Zhai, Bing Huang
Small heat shock proteins (sHsps) are ubiquitous and diverse molecular chaperones. Found in almost all organisms, they regulate protein refolding and protect cells from stress. Until now, no sHsp has been characterized in Eimeria tenella. In this study, the novel EtsHsp20.4 gene was cloned from E. tenella by rapid amplification of cDNA ends based on a previously identified expressed sequence tag. The full-length cDNA was 1019bp in length and contained an open reading frame of 558bp that encoded a 185-amino acid polypeptide with a calculated molecular weight of 20...
October 17, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/29054697/a-novel-method-for-oxygen-glucose-deprivation-model-in-organotypic-spinal-cord-slices
#3
Jing-Jie Liu, Xiao-Yan Ding, Li Xiang, Feng Zhao, Sheng-Li Huang
This study aimed to establish a model to closely mimic spinal cord hypoxic-ischemic injury with high production and high reproducibility. Fourteen-day cultured organotypic spinal cord slices were divided into 4 groups: control (Ctrl), oxygen glucose deprived for 30min (OGD 30min), OGD 60min, and OGD 120min. The Ctrl slices were incubated with 1ml propidium iodide (PI) solution (5μg/ml) for 30minutes. The OGD groups were incubated with 1ml glucose-free DMEM/F12 medium and 5μl PI solution (1mg/ml) for 30min, 60min and 120min, respectively...
October 17, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/29054567/hydrogen-sulfide-specifically-alters-nad-p-h-quinone-dehydrogenase-1-nqo1-olfactory-neurons-in-the-rat
#4
Fumiaki Imamura, Timothy K Cooper, Sanae Hasegawa-Ishii, Takashi Sonobe, Philippe Haouzi
The regions of the olfactory epithelium affected by hydrogen sulfide (H2S) toxicity in the rat present a striking similarity with the developmental olfactory zone 1 described in the mouse. This zone which is the only region containing neurons expressing NAD(P)H quinone dehydrogenase 1 (NQO1) is involved in complex behavioral responses in rodents, and other mammals, triggered by specific olfactory stimuli. We therefore sought to determine whether 1) olfactory neurons expressing NQO1 are located in the same regions in the rats and in the mice and 2) there is an overlap between olfactory neurons expressing this protein and those affected by the toxicity of H2S...
October 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/29054464/improved-kinetic-model-of-escherichia-coli-central-carbon-metabolism-in-batch-and-continuous-cultures
#5
Hiroyuki Kurata, Yurie Sugimoto
Many kinetic models of Escherichiacoli central metabolism have been built, but few models accurately reproduced the dynamic behaviors of wild type and multiple genetic mutants. In 2016 our latest kinetic model improved problems of existing models to reproduce the cell growth and glucose uptake of wild type, ΔpykA:pykF and Δpgi in a batch culture, while it overestimated the glucose uptake and cell growth rates of Δppc and hardly captured the typical characteristics of the glyoxylate and TCA cycle fluxes for Δpgi and Δppc...
October 18, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/29053816/histomorphometric-study-of-the-anterior-latissimus-dorsi-muscle-and-evaluation-of-enzymatic-markers-of-broilers-affected-with-dorsal-cranial-myopathy
#6
R Sesterhenn, F M Siqueira, A C Hamerski, D Driemeier, S F Valle, S L Vieira, L Kindlein, V P Nascimento
Dorsal cranial myopathy (DCM), which affects the anterior latissimus dorsi (ALD) muscles of commercial broilers, is of unknown etiology, and it represents up to 6% of the partial condemnations in Brazilian slaughterhouses. This study was performed to achieve histomorphometric characterizations of the ALD muscles from male Cobb 500 broilers slaughtered at either 35 d or 42 d and to evaluate the effects of DCM on the enzymatic markers aspartate aminotransferase (AST), alanine aminotransferase (ALT), creatine kinase (CK), and lactate dehydrogenase (LDH) and on uric acid and creatinine metabolites...
September 20, 2017: Poultry Science
https://www.readbyqxmd.com/read/29053743/in-vitro-modeling-of-experimental-succinic-semialdehyde-dehydrogenase-deficiency-ssadhd-using-brain-derived-neural-stem-cells
#7
Kara R Vogel, Garrett R Ainslie, Erwin E Jansen, Gajja S Salomons, Jean-Baptiste Roullet, K Michael Gibson
We explored the utility of neural stem cells (NSCs) as an in vitro model for evaluating preclinical therapeutics in succinic semialdehyde dehydrogenase-deficient (SSADHD) mice. NSCs were obtained from aldh5a1+/+ and aldh5a1-/- mice (aldh5a1 = aldehyde dehydrogenase 5a1 = SSADH). Multiple parameters were evaluated including: (1) production of GHB (γ-hydroxybutyrate), the biochemical hallmark of SSADHD; (2) rescue from cell death with the dual mTOR (mechanistic target of rapamycin) inhibitor, XL-765, an agent previously shown to rescue aldh5a1-/- mice from premature lethality; (3) mitochondrial number, total reactive oxygen species, and mitochondrial superoxide production, all previously documented as abnormal in aldh5a1-/- mice; (4) total ATP levels and ATP consumption; and (5) selected gene expression profiles associated with epilepsy, a prominent feature in both experimental and human SSADHD...
2017: PloS One
https://www.readbyqxmd.com/read/29053368/phytostabilization-potential-of-ornamental-plants-grown-in-soil-contaminated-with-cadmium
#8
Peng Zeng, Zhaohui Guo, Xia Cao, Xiyuan Xiao, Yanan Liu, Lei Shi
In a greenhouse experiment, five ornamental plants, Osmanthus fragrans (OF), Ligustrum vicaryi L. (LV), Cinnamomum camphora (CC), Loropetalum chinense var. rubrum (LC), and Euonymus japonicas cv. Aureo-mar (EJ), were studied for the ability to phytostabilization for Cd-contaminated soil. The results showed that these five ornamental plants can grow normally when the soil Cd content is less than 24.6 mg·kg(-1). Cd was mainly deposited in the roots of OF, LV, LC and EJ which have grown in Cd-contaminated soils, and the maximum Cd contents reached 15...
October 20, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29053280/structural-and-biochemical-investigation-of-pglf-from-campylobacter-jejuni-reveals-a-new-mechanism-for-a-member-of-the-short-chain-dehydrogenase-reductase-superfamily
#9
Alexander S Riegert, James B Thoden, Ian C Schoenhofen, David C Watson, N Martin Young, Peter A Tipton, Hazel M Holden
Within recent years it has become apparent that protein glycosylation is not limited to eukaryotes. Indeed, in Campylobacter jejuni, a Gram negative bacterium, more than 60 of its proteins are known to be glycosylated. One of the sugars found in such glycosylated proteins is 2,4-diacetamido-2,4,6-trideoxy--d-glucopyranose, hereafter referred to as QuiNAc4NAc. The pathway for its biosynthesis, initiating with UDP-GlcNAc, requires three enzymes referred to as PglF, PglE, and PlgD. The focus of this investigation is on PglF, an NAD+-dependent sugar 4,6-dehydratase known to belong to the short chain dehydrogenase/reductase (SDR) superfamily...
October 20, 2017: Biochemistry
https://www.readbyqxmd.com/read/29052103/patterns-of-specificity-and-diversity-in-species-of-paraorygmatobothrium-ruhnke-1994-cestoda-phyllobothriidae-in-moreton-bay-queensland-australia-with-the-description-of-four-new-species
#10
Scott C Cutmore, Michael B Bennett, Terrence L Miller, Thomas H Cribb
A survey of tapeworms of galeomorph sharks from Moreton Bay (Queensland, Australia) identified a complex of species of Paraorygmatobothrium Ruhnke, 1994 infecting 11 carcharhiniform and two orectolobiform species. Combined morphological and multi-locus molecular analyses (based on the 28S nuclear ribosomal RNA and partial mitochondrial NADH dehydrogenase subunit 1 genes) revealed the presence of 12 species of Paraorygmatobothrium; four species (Paraorygmatobothrium christopheri n. sp., P. harti n. sp., P. sinclairtaylori n...
October 19, 2017: Systematic Parasitology
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
#11
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/29051443/vitis-vinifera-extract-ameliorate-hepatic-and-renal-dysfunction-induced-by-dexamethasone-in-albino-rats
#12
Nabil A Hasona, Ahmed A Alrashidi, Thamer Z Aldugieman, Ali M Alshdokhi, Mohammed Q Ahmed
This study was conducted to evaluate the biochemical effects of grape seed extract against dexamethasone-induced hepatic and renal dysfunction in a female albino rat. Twenty-eight adult female rats were divided randomly into four equal groups: Group 1: animals were injected subcutaneously with saline and consider as normal control one. Group 2: animals were injected subcutaneously with dexamethasone in a dose of 0.1 mg/kg body weight. Group 3: animals were injected subcutaneously with 0.1 mg/kg body weight of dexamethasone, and then treated with a grape seed extract in a dose of 200 mg/kg body weight by oral gavage...
April 11, 2017: Toxics
https://www.readbyqxmd.com/read/29051071/increase-of-bacillus-badius-phenylalanine-dehydrogenase-specificity-towards-phenylalanine-substrate-by-site-directed-mutagenesis
#13
Farzad Yousefi, Farangis Ataei, Seyed Shahriar Arab, Saman Hosseinkhani
Phenylalanine dehydrogenase (PheDH) is a key enzyme in medical diagnostic for determining the amount of phenylalanine to detect phenylketonuria (PKU) disease. However, determination of phenylalanine can be usually disturbed in presence of tyrosine in blood samples. Position N145 of B.sphaericus PheDH, has been previously showed a crucial role in substrate binding, which corresponded by position V144 in B. badius PheDH. In this study, the PheDH of B. badius due to reasonable activity was cloned and subjected to site-directed mutagenesis at mentioned position, followed by kinetic and structural studies to find more exclusive mutants...
October 16, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29050299/exostosin-1-regulates-cancer-cell-stemness-in-doxorubicin-resistant-breast-cancer-cells
#14
Sarala Manandhar, Chang-Gu Kim, Sun-Hee Lee, Soo Hyun Kang, Nikita Basnet, You Mie Lee
Cancer stem cells (CSCs) are associated with cancer recurrence following radio/chemotherapy owing to their high resistance to therapeutic intervention. In this study, we investigated the role of exostoxin 1 (EXT1), an endoplasmic reticulum (ER)-residing type II transmembrane glycoprotein, in cancer cell stemness. DNA microarray analysis revealed that doxorubicin-resistant MCF7/ADR cells have high levels of EXT1 expression compared to its parental cell line, MCF7. These cells showed significantly higher populations of CSCs and larger populations of aldehyde dehydrogenase (ALDH(+)) and CD44(+)/CD24(-)cells, as compared to MCF7 cells...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050221/pdgfra-hsd17b4-and-hmgb2-are-potential-therapeutic-targets-in-polycystic-ovarian-syndrome-and-breast-cancer
#15
Huiyu Xu, Yong Han, Jiaying Lou, Hongxian Zhang, Yue Zhao, Balázs Győrffy, Rong Li
To explore the key genes associated with both PCOS and breast cancer, we overlapped the synchronously differently expressed genes in two obese insulin-resistant GEO datasets in muscle tissue and genes exert essential roles in breast cancer prognosis together base on the following reasons: (1) Androgens excess is believed to contribute to the onset of both PCOS and breast cancer. (2) PCOS is usually complicated with metabolic symptoms, such as obesity and insulin-resistance. (3) Muscle is the main place where energy metabolism and material metabolism take place...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050113/-long-term-follow-up-of-neuroblastoma-in-children-less-than-18-months-of-age
#16
J Zhao, C Pan, M Xu, M Zhou, Y J Gao, W T Hu, J Y Tang
Objective: To assess the clinical features and long-term outcomes of neuroblastoma (NB) in children less than 18 months of age, so as to provide evidence for further improvement of treatment. Method: Clinical data(sex, age, stage, risk group, treatment response, follow-up, etc.) of 155 NB patients under age of 18 months from June 2000 to December 2015 in Shanghai Children's Medical Center were analyzed retrospectively. The clinical features were summarized and the long-term follow-up results were evaluated...
October 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29050112/-clinical-pathologic-characteristics-and-treatment-outcomes-of-19-relapsed-pediatric-b-cell-lymphoma
#17
S Huang, L Jin, J Yang, Y L Duan, M Zhang, C J Zhou, X L Ma, Y H Zhang
Objective: To review the clinical-pathology characteristics of 19 relapsed pediatric mature B cell lymphoma and to find the risk factors for recurrence and the feasible treatment after relapse. Method: Data of 212 pediatric B cell lymphomas cases in Beijing Children's Hospital from January 2006 to June 2015 were collected retrospectively. All the patients were treated according to the B cell lymphoma regimen of Beijing Children's Hospital. During the study period, 19 of 212 cases were relapsed; the clinio-pathological characteristics of relapsed patients before treatment and after relapse were analyzed retrospectively, the treatment outcomes after relapse were summarized and the patients were followed-up...
October 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29049946/rechargeable-flexible-and-mediator-free-biosupercapacitor-based-on-transparent-ito-nanoparticle-modified-electrodes-acting-in-%C3%A2%C2%B5m-glucose-containing-buffers
#18
Tim Bobrowski, Elena González Arribas, Roland Ludwig, Miguel D Toscano, Sergey Shleev, Wolfgang Schuhmann
We present a transparent and flexible self-charging biosupercapacitor based on an optimised mediator- and membrane-free enzymatic glucose/oxygen biofuel cell. Indium tin oxide (ITO) nanoparticles were spray-coated on transparent conducting ITO supports resulting in a flocculent, porous and nanostructured electrode surface. By this, high capacitive currents caused by an increased electrochemical double layer as well as enhanced catalytic currents due to a higher number of immobilised enzyme molecules were obtained...
October 11, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29049914/t-2-toxin-induces-cytotoxicity-and-disrupts-tight-junction-barrier-in-serw3-cells
#19
Elif Karacaoğlu, Güldeniz Selmanoğlu
T-2 toxin, which is produced in grain and grain products as a secondary metabolite by Fusarium species, is also potentially dangerous for human health. Up to date, no study was reported the cytotoxicity of T-2 toxin on SerW3 cells in the perspective of junctional barriers. This study focused on revealing the cytotoxic effects of T-2 on Sertoli cells associated with cell junctional barriers. In the present study, SerW3 cells were exposed to T-2 toxin at 12, 120 and 1200ng/ml doses for 24 and 48h. Cytotoxicity tests including cell viability (MTT), lactate dehydrogenase (LDH) cytotoxicity test and trypan blue exclusion assay were performed...
October 12, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29049740/phenotypic-plasticity-in-uveal-melanoma-is-not-restricted-to-a-tumor-subpopulation-and-is-unrelated-to-cancer-stem-cell-characteristics
#20
Rachel E Doherty, Karen Sisley, David W Hammond, Ian G Rennie, Neil A Cross
Purpose: Uveal melanoma (UM) is the most common primary intraocular malignancy in adults and approximately half of those diagnosed will die of metastasis. This study investigates whether UM progression is driven by a subpopulation of stem-like cells, termed "cancer stem cells" (CSCs). Methods: Expression of postulated stem cell markers aldehyde dehydrogenase (ALDH), CD44, and CD133 was analyzed in UM cell lines and primary UM short-term cultures (STCs) established from tumor samples...
October 1, 2017: Investigative Ophthalmology & Visual Science
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