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https://www.readbyqxmd.com/read/29452248/mercaptopyruvate-acts-as-endogenous-vasodilator-independently-of-3-mercaptopyruvate-sulfurtransferase-activity
#1
Emma Mitidieri, Teresa Tramontano, Danila Gurgone, Valentina Citi, Vincenzo Calderone, Vincenzo Brancaleone, Antonia Katsouda, Noriyuki Nagahara, Andreas Papapetropoulos, Giuseppe Cirino, Roberta d'Emmanuele di Villa Bianca, Raffaella Sorrentino
Hydrogen sulfide (H 2 S) is produced by the action of cystathionine-β-synthase (CBS), cystathionine-γ-lyase (CSE) or 3-mercaptopyruvate sulfurtransferase (3-MST). 3-MST converts 3-mercaptopyruvate (MPT) to H 2 S and pyruvate. H 2 S is recognized as an endogenous gaseous mediator with multiple regulatory roles in mammalian cells and organisms. In the present study we demonstrate that MPT, the endogenous substrate of 3-MST, acts also as endogenous H 2 S donor. Colorimetric, amperometric and fluorescence based assays demonstrated that MPT releases H 2 S in vitro in an enzyme-independent manner...
February 13, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29451408/single-nucleotide-polymorphisms-in-key-one-carbon-metabolism-genes-and-their-association-with-blood-folate-and-homocysteine-levels-in-a-chinese-population-in-yunnan
#2
Juan Ni, Yaoxian Liu, Tao Zhou, Xiayu Wu, Xu Wang
OBJECTIVE: One-carbon metabolism (OCM) is essential for DNA synthesis and methylation. Single nucleotide polymorphisms (SNPs) within OCM genes may affect folic acid (FA) metabolism, disrupt homocysteine (Hcy) homeostasis, and increase the risk of disease. This study investigated the relationship between SNPs in key OCM genes and their association with blood FA and Hcy levels in a healthy population in Yunnan, China. METHODS: Six SNPs within five key OCM genes (MTHFR C677T, MTHFR A1298C, MS A2756G, MTRR A66G, CBS T833C, and SHMT C1420T) were genotyped in 300 healthy volunteers (148 males and 152 females) using polymerase chain reaction/restriction fragment length polymorphism...
February 16, 2018: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/29449401/draft-genome-sequence-of-the-sordariomycete-lecythophora-coniochaeta-hoffmannii-cbs-245-38
#3
Sabrina Leonhardt, Enrico Büttner, Anna Maria Gebauer, Martin Hofrichter, Harald Kellner
Lecythophora ( Coniochaeta ) hoffmannii , a soil- and lignocellulose-inhabiting sordariomycete (Ascomycota) that can also live as a facultative tree pathogen causing soft rot, belongs to the family Coniochaetaceae. The strain CBS 245.38 sequenced here was assembled into 869 contigs, has a size of 30.8 Mb, and comprises 10,596 predicted protein-coding genes.
February 15, 2018: Genome Announcements
https://www.readbyqxmd.com/read/29446016/removal-of-organochlorine-pesticides-from-lindane-production-wastes-by-electrochemical-oxidation
#4
Carmen M Dominguez, Nihal Oturan, Arturo Romero, Aurora Santos, Mehmet A Oturan
This study is focused on the effective removal of recalcitrant pollutants hexaclorocyclohexanes (HCHs, isomers α, β, γ, and δ) and chlorobenzenes (CBs) present in a real groundwater coming from a landfill of an old lindane factory. Groundwater is characterized by a total organic carbon (TOC) content of 9 mg L -1 , pH 0 = 7, conductivity = 3.7 mS cm -1 , high salt concentration (SO 4 2- , HCO 3 - , Cl - ), and ferrous iron in solution. The experiments were performed using a BDD anode and a carbon felt (CF) cathode at the natural groundwater pH and without addition of supporting electrolyte...
February 14, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29443521/the-structure-and-cl-o-dissociation-energy-of-the-cloo-radical-finally-the-right-answers-for-the-right-reason
#5
Adam S Abbott, Henry F Schaefer
The chlorine peroxy radical (ClOO) has historically been a highly problematic system for theoretical studies. In particular, the erratic \textit{ab initio} predictions of the Cl--O bond length reported in the literature thus far exhibit unacceptable errors with respect to the experimental structure. In light of the widespread disagreement observed, we present a careful and systematic investigation of the ClOO geometry towards the basis set and correlation limits of single reference \textit{ab initio} theory, employing the cc-pVXZ (X = D, T, Q, 5, 6) basis sets extrapolated to the complete basis set limit and coupled cluster theory up through single, double, triple, and perturbative quadruple excitations [CCSDT(Q)]...
February 14, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29442545/novel-compound-heterozygous-clcnkb-gene-mutations-c-1755a-g-c-848_850deltct-cause-classic-bartter-syndrome
#6
Chunli Wang, Ying Chen, Bixia Zheng, Mengshu Zhu, Jia Fan, Juejin Wang, Zhanjun Jia, Songming Huang, Aihua Zhang
Inactivated variants in CLCNKB gene encoding the basolateral chloride channel ClC-Kb cause classic Bartter syndrome characterized by hypokalemic metabolic alkalosis and hyperreninemic hyperaldosteronism. Here we identified two cBS siblings presenting hypokalemia in a Chinese family due to novel compound heterozygous CLCNKB mutations (c.848_850delTCT/c.1755A>G). Compound heterozygosity was confirmed by amplifying and sequencing the patient's genomic DNA. The synonymous mutation c.1755A>G (Thr585Thr) was located at +2bp from the 5' splice donor site in exon 15, further transcript analysis demonstrated that this single nucleotide mutation causes exclusion of exon 15 in the cDNA from the proband and his mother...
February 14, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29428866/prognostic-value-of-circulating-biomarker-score-in-advanced-stage-head-and-neck-squamous-cell-carcinoma
#7
Marn Joon Park, Jong-Lyel Roh, Sung-Bae Kim, Seung-Ho Choi, Soon Yuhl Nam, Sang Yoon Kim
BACKGROUND: Circulating biomarker (CB) is a convenient, emerging predictive tool for treatment response and outcomes in human cancers. Therefore, we examined the prognostic value of pre-treatment and early post-treatment CBs and their summated scores in patients with head and neck squamous cell carcinoma (HNSCC). METHODS: This study prospectively included 310 consecutive patients who underwent definitive treatment for previously untreated advanced-stage HNSCC between 2010 and 2015...
February 8, 2018: European Journal of Cancer
https://www.readbyqxmd.com/read/29426136/first-report-of-bioaccumulation-and-bioconcentration-of-aliphatic-hydrocarbons-ahs-and-persistent-organic-pollutants-pahs-pcbs-and-pcns-and-their-effects-on-alcyonacea-and-scleractinian-corals-and-their-endosymbiotic-algae-from-the-persian-gulf-iran-inter-and
#8
Ali Ranjbar Jafarabadi, Alireza Riyahi Bakhtiari, Mansour Aliabadian, Hédouin Laetitia, Amirhossein Shadmehri Toosi, Chee Kong Yap
The coral reefs of the Persian Gulf are the most diverse systems of life in the marine environment of the Middle East. Unfortunately, they are highly threatened by local and global stressors, particularly oil pollutants. This is the first quantitative and qualitative study aimed at assessing the concentration and sources of n-alkanes and POPs (PAHs, PCBs and PCNs) in coral tissues, symbiotic algae (zooxanthellae), reef sediments and seawaters in coral reefs of Lark and Kharg in the Persian Gulf, Iran. This work was conducted on eight species of six genera and three families of hard corals and one family of soft coral...
January 29, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29425797/antinociceptive-effects-of-the-endogenous-cannabinoid-peptide-agonist-vd-hemopressin-%C3%AE-in-mice
#9
Pei Wang, Ting Zheng, Mengna Zhang, Biao Xu, Run Zhang, Ting Zhang, Weidong Zhao, Xuerui Shi, Qinqin Zhang, Quan Fang
Cannabinoids (CBs) play important roles in pain modulation. Recently, VD-hemopressin(β) [VD-Hpβ], a 12-residue β-hemoglobin-derived peptide, was reported to activate both CB1 and CB2 receptors in vitro. To further characterize in vivo actions of VD-Hpβ, its antinociceptive activity and site(s) were evaluated in the mouse tail-flick test, and supraspinal antinociception of VD-Hpβ was further assessed in the writhing test. Our results demonstrated that supraspinal, intrathecal, subcutaneous and intraperitoneal administrations of VD-Hpβ produced analgesia in the tail-flick test...
February 6, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29421602/report-of-two-unrelated-families-with-jalili-syndrome-and-a-novel-nonsense-heterozygous-mutation-in-cnnm4-gene
#10
Célia Márcia Fernandes Maia, Renato Assis Machado, Vera Lúcia Gil-da-Silva-Lopes, Elaine Lustosa-Mendes, Priscila Hae Hyun Rim, Verônica Oliveira Dias, Daniella Reis Barbosa Martelli, Luciano Sólia Nasser, Ricardo D Coletta, Hercílio Martelli-Júnior
Jalili syndrome (JS) is an autosomal recessive disease characterized by a combination of cone-rode retinal dytrophy (CRD) and amelogenesis imperfect (AI). Mutations in cyclin and CBS domain divalent metal cation transport mediator 4 (CNNM4) gene cause JS. Here we described 2 families (3 members) affected by JS. In the first family, JS was caused by the homozygous p.Leu324Pro (c.971T > C) missense mutation and the affected patient developed both CRD and AI. In the second family, a specific combination of a compound heterozygous mutation was found - the p...
February 5, 2018: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29420583/controlled-hypothermia-may-improve-surfactant-function-in-asphyxiated-neonates-with-or-without-meconium-aspiration-syndrome
#11
Chiara Autilio, Mercedes Echaide, Daniele De Luca, Jesús Pérez-Gil
BACKGROUND: Whole-body hypothermia (WBH) is used to improve neurological outcomes in perinatal asphyxia. Recent studies suggested a beneficial effect of hypothermia for some types of acute respiratory failure. However, no data are available about the biophysical function of human surfactant during WBH. We investigated whether WBH improves surfactant biophysical properties in asphyxiated neonates with or without meconium aspiration syndrome (MAS). METHODS: Non-bronchoscopic bronchoalveolar lavage (BAL) has been collected from 10 asphyxiated neonates (2 with MAS, 8 with no lung disease (NLD)) at different time-points (pre-WBH, 24h, 48h, 72h of WBH and post-WBH)...
2018: PloS One
https://www.readbyqxmd.com/read/29415998/homocysteine-activates-autophagy-by-inhibition-of-cftr-expression-via-interaction-between-dna-methylation-and-h3k27me3-in-mouse-liver
#12
Anning Yang, Yun Jiao, Songhao Yang, Mei Deng, Xiaoling Yang, Caiyan Mao, Yue Sun, Ning Ding, Nan Li, Minghao Zhang, Shaoju Jin, Huiping Zhang, Yideng Jiang
Elevated homocysteine (Hcy) levels have been reported to be involved in liver injury, and autophagy plays an important role in normal hepatic physiology and pathophysiology, but the mechanism underlying Hcy regulated autophagy is currently unknown. In this study, CBS+/- mice were fed with regular diet for 12 weeks to establish a hyperhomocysteinemia (HHcy) model and HL-7702 cells were treated with Hcy, we found that Hcy increases autophagy and aggravates liver injury by downregulation of cystic fibrosis transmembrane conductance regulator (CFTR) expression in vivo and in vitro...
February 7, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29415178/the-sm-core-mediates-the-retention-of-partially-assembled-spliceosomal-snrnps-in-cajal-bodies-until-their-full-maturation
#13
Adriana Roithová, Klára Klimešová, Josef Pánek, Cindy L Will, Reinhard Lührmann, David Stanek, Cyrille Girard
Cajal bodies (CBs) are nuclear non-membrane bound organelles where small nuclear ribonucleoprotein particles (snRNPs) undergo their final maturation and quality control before they are released to the nucleoplasm. However, the molecular mechanism how immature snRNPs are targeted and retained in CBs has yet to be described. Here, we microinjected and expressed various snRNA deletion mutants as well as chimeric 7SK, Alu or bacterial SRP non-coding RNAs and provide evidence that Sm and SMN binding sites are necessary and sufficient for CB localization of snRNAs...
February 5, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29413906/dysfunction-of-pulmonary-surfactant-mediated-by-phospholipid-oxidation-is-cholesterol-dependent
#14
Mustafa Al-Saiedy, Ryan Pratt, Patrick Lai, Evan Kerek, Heidi Joyce, Elmar Prenner, Francis Green, Chang-Chun Ling, Ruud Veldhuizen, Salim Ghandorah, Matthias Amrein
Pulmonary surfactant forms a cohesive film at the alveolar air-lung interface, lowering surface tension, and thus reducing the work of breathing and preventing atelectasis. Surfactant function becomes impaired during inflammation due to degradation of the surfactant lipids and proteins by free radicals. In this study, we examine the role of reactive nitrogen (RNS) and oxygen (ROS) species on surfactant function with and without physiological cholesterol levels (5-10%). Surface activity was assessed in vitro in a captive bubble surfactometer (CBS)...
February 2, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29410458/heme-interaction-of-the-intrinsically-disordered-n-terminal-peptide-segment-of-human-cystathionine-%C3%AE-synthase
#15
Amit Kumar, Amelie Wißbrock, Nishit Goradia, Peter Bellstedt, Ramadurai Ramachandran, Diana Imhof, Oliver Ohlenschläger
Cystathionine-β-synthase (CBS) belongs to a large family of pyridoxal 5'-phosphate (PLP)-dependent enzymes, responsible for the sulfur metabolism. The heme-dependent protein CBS is part of regulatory pathways also involving the gasotransmitter hydrogen sulfide. Malfunction of CBS can lead to pathologic conditions like cancer, cardiovascular and neurodegenerative disorders. Truncation of residues 1-40, absent in X-ray structures of CBS, reduces but does not abolish the activity of the enzyme. Here we report the NMR resonance assignment and heme interaction studies for the N-terminal peptide stretch of CBS...
February 6, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29406901/scan-without-evidence-of-dopaminergic-deficit-swedd-in-degenerative-parkinsonism-and-dementia-with-lewy-bodies-a-prospective-study
#16
Nicolas Nicastro, Pierre R Burkhard, Valentina Garibotto
BACKGROUND: 123I-FP-CIT SPECT imaging is a reliable method to assess presynaptic dopaminergic pathways in degenerative parkinsonisms and dementia with Lewy bodies (DLB). METHODS: We aimed at examining sensitivity of combined visual and semi-quantitative 123I-FP-CIT SPECT analyses in a prospective cohort of subjects with DLB and degenerative parkinsonisms - Parkinson's disease (PD), multiple system atrophy (MSA), corticobasal syndrome (CBS) and progressive supranuclear palsy (PSP) to determine prevalence and clinical significance of scans without evidence of dopaminergic deficit (SWEDD)...
February 15, 2018: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29403166/galectin-3-and-hbme-1-expression-on-agarose-cell-blocks-from-fine-needle-aspirates-of-follicular-cell-derived-thyroid-tumors
#17
E Abu-Sinna, M Y Hasan, M M El-Deftar, S A Amer, L O Abdelsalam, J A Nakhla
Aim: To test the expression of galectin-3 (gal-3) and Hector Battifora mesothelial antigen-1 (HBME-1) on agarose cell blocks (CBs) of fine-needle aspirates aiming to determine their diagnostic value in thyroid follicle cell-derived tumors. Materials and Methods: Forty patients with thyroid nodule were enrolled. Fine-needle aspiration biopsy was done and processed to produce smears and CBs. Immune staining was done on CBs using antibodies to gal-3 and HBME-1. Diagnostic value of tests was determined in comparison to pathology...
January 2018: Journal of Cytology
https://www.readbyqxmd.com/read/29398487/enzyme-replacement-therapy-ameliorates-multiple-symptoms-of-murine-homocystinuria
#18
Tomas Majtan, Wendell Jones, Jakub Krijt, Insun Park, Warren D Kruger, Viktor Kožich, Steven Bassnett, Erez M Bublil, Jan P Kraus
Classical homocystinuria (HCU) is the most common inherited disorder of sulfur amino acid metabolism caused by deficiency in cystathionine beta-synthase (CBS) activity and characterized by severe elevation of homocysteine in blood and tissues. Treatment with dietary methionine restriction is not optimal, and poor compliance leads to serious complications. We developed an enzyme replacement therapy (ERT) and studied its efficacy in a severe form of HCU in mouse (the I278T model). Treatment was initiated before or after the onset of clinical symptoms in an effort to prevent or reverse the phenotype...
December 19, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/29388077/description-of-komagataella-mondaviorum-sp-nov-a-new-sibling-species-of-komagataella-pichia-pastoris
#19
Gennadi I Naumov, Elena S Naumova, Kyria L Boundy-Mills
Five methylotrophic strains (UCDFST 71-1024T, UCDFST 54-11.16, UCDFST 54-11.141, UCDFST 68-967.1 and UCDFST 74-1030) from the Phaff Yeast Culture Collection (University of California Davis, USA) that were originally designated as Pichia pastoris were found to represent a novel Komagataella species. Strains of Komagataella mondaviorum sp. nov. UCDFST 71-1024T(type strain) = CBS 15017, UCDFST 54-11.16, UCDFST 54-11.141, UCDFST 68-967.1, and UCDFST 74-1030 were isolated in USA, respectively, from cottonwood tree Populus deltoides in 1971 (Davis, CA), slime flux of Quercus sp...
January 31, 2018: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/29382822/bismuth-antimicrobial-drugs-serve-as-broad-spectrum-metallo-%C3%AE-lactamase-inhibitors
#20
Runming Wang, Tsz-Pui Lai, Peng Gao, Hongmin Zhang, Pak-Leung Ho, Patrick Chiu-Yat Woo, Guixing Ma, Richard Yi-Tsun Kao, Hongyan Li, Hongzhe Sun
Drug-resistant superbugs pose a huge threat to human health. Infections by Enterobacteriaceae producing metallo-β-lactamases (MBLs), e.g., New Delhi metallo-β-lactamase 1 (NDM-1) are very difficult to treat. Development of effective MBL inhibitors to revive the efficacy of existing antibiotics is highly desirable. However, such inhibitors are not clinically available till now. Here we show that an anti-Helicobacter pylori drug, colloidal bismuth subcitrate (CBS), and related Bi(III) compounds irreversibly inhibit different types of MBLs via the mechanism, with one Bi(III) displacing two Zn(II) ions as revealed by X-ray crystallography, leading to the release of Zn(II) cofactors...
January 30, 2018: Nature Communications
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