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https://www.readbyqxmd.com/read/28446312/-clinical-characteristics-and-gene-mutations-of-gilbert-syndrome-complicated-with-myeloproliferative-neoplasm
#1
Xing-Xin Li, Jun Shi, Zhen-Dong Huang, Ying-Qi Shao, Neng Nie, Jing Zhang, Mei-Li Ge, Jin-Bo Huang, Yi-Zhou Zheng
OBJECTIVE: To investigate the clinical characteristics and gene mutations of patients with Gilbert syndrome complicated with myeloproliferative neoplasms (MPN). METHODS: Peripheral blood samples from 1 patient with Gilbert syndrome complicated with MPN and his son were collected to analyse all exon mutations of UGT1A1 gene. RESULTS: The patient with leukocytosis, thrombocythemia, mild anemia and positive JAK2/V617F mutation was initially diagnosed as MPN...
April 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28445691/tis11-mediated-mrna-decay-promotes-the-reacquisition-of-drosophila-intestinal-stem-cell-quiescence
#2
Lindy McClelland, Heinrich Jasper, Benoît Biteau
Adult stem cell proliferation rates are precisely regulated to maintain long-term tissue homeostasis. Defects in the mechanisms controlling stem cell proliferation result in impaired regeneration and hyperproliferative diseases. Many stem cell populations increase proliferation in response to tissue damage and reacquire basal proliferation rates after tissue repair is completed. Although proliferative signals have been extensively studied, much less is known about the molecular mechanisms that restore stem cell quiescence...
April 23, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28443723/glucuronidation-of-icaritin-by-human-liver-microsomes-human-intestine-microsomes-and-expressed-udp-glucuronosyltransferase-enzymes-identification-of-ugt1a3-1a9-and-2b7-as-the-main-contributing-enzymes
#3
Li Wang, Xiaodan Hong, Zhihong Yao, Yi Dai, Guoping Zhao, Zifei Qin, Baojian Wu, Frank J Gonzalez, Xinsheng Yao
1. Icaritin is a natural flavonoid with anti-osteoporosis activity. This study aimed to characterize icaritin glucuronidation by pooled human liver microsomes (HLM) and pooled human intestine microsomes (HIM), and to determine the contribution of individual UDP-glucuronosyltrans-ferase (UGT) enzyme to icaritin glucuronidation. 2. Glucuronidation rates were determined by incubating icaritin with uridine diphosphate glucuronic acid (UDPGA)-supplemented microsomes. Kinetic parameters were derived by appropriate model fitting...
April 26, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/28442641/regulation-of-uridine-diphosphate-glucuronosyltransferase-2b15-expression-during-ovulation-in-the-rat
#4
Phuong T M Dam, You-Jee Jang, Jae-Il Park, Bum-Chae Choi, Sang-Jin Song, Sang-Young Chun
Uridine diphosphate-glucuronosyltransferase 2B15 (UGT2B15) conjugates 5α-androstane-3α, 17β-diol (3α-diol) to 3α-diol glucuronide (3α-diol G) in steroid target tissues. The present study investigated the regulation of UGT2B15 expression during the ovulatory process in the rat. Real-time PCR analysis revealed that treatment of immature rats with equine chorionic gonadotropin followed by human chorionic gonadotropin transiently stimulated UGT2B15 gene expression in granulosa cells of preovulatory follicles within 6 h...
April 22, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28442499/absorption-distribution-metabolism-and-excretion-of-the-oral-prostaglandin-d2-receptor-2-dp2-antagonist-fevipiprant-qaw039-in-healthy-volunteers-and-in-vitro
#5
David Pearson, H Markus Weiss, Yi Jin, Jan Jaap van Lier, Veit J Erpenbeck, Ulrike Glaenzel, Peter End, Ralph Woessner, Fabian Eggimann, Gian Camenisch
Fevipiprant is a novel oral prostaglandin D2 receptor 2 (DP2; also known as CRTh2) antagonist, which is currently in development for the treatment of severe asthma and atopic dermatitis. We investigated the absorption, distribution, metabolism, and excretion properties of fevipiprant in healthy subjects after a single 200 mg oral dose of [(14)C]-radiolabeled fevipiprant. Fevipiprant and metabolites were analyzed by liquid chromatography coupled to tandem mass spectrometry and radioactivity measurements, and mechanistic in vitro studies were performed to investigate clearance pathways and covalent plasma protein binding...
April 25, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28432611/comparison-of-human-erythrocyte-purine-nucleotide-metabolism-and-blood-purine-and-pyrimidine-degradation-product-concentrations-before-and-after-acute-exercise-in-trained-and-sedentary-subjects
#6
Wioleta Dudzinska, M Suska, A Lubkowska, K Jakubowska, M Olszewska, K Safranow, D Chlubek
This study aimed at evaluating the concentration of erythrocyte purine nucleotides (ATP, ADP, AMP, IMP) in trained and sedentary subjects before and after maximal physical exercise together with measuring the activity of purine metabolism enzymes as well as the concentration of purine (hypoxanthine, xanthine, uric acid) and pyrimidine (uridine) degradation products in blood. The study included 15 male elite rowers [mean age 24.3 ± 2.56 years; maximal oxygen uptake (VO2max) 52.8 ± 4.54 mL/kg/min; endurance and strength training 8...
April 21, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28430781/an-unmodified-wobble-uridine-in-trnas-specific-for-glutamine-lysine-and-glutamic-acid-from-salmonella-enterica-serovar-typhimurium-results-in-nonviability-due-to-increased-missense-errors
#7
Kristina Nilsson, Gunilla Jäger, Glenn R Björk
In the wobble position of tRNAs specific for Gln, Lys, and Glu a universally conserved 5-methylene-2-thiouridine derivative (xm5s2U34, x denotes any of several chemical substituents and 34 denotes the wobble position) is present, which is 5-(carboxy)methylaminomethyl-2-thiouridine ((c)mnm5s2U34) in Bacteria and 5-methylcarboxymethyl-2-thiouridine (mcm5s2U34) in Eukarya. Here we show that mutants of the bacterium Salmonella enterica Serovar Typhimurium LT2 lacking either the s2- or the (c)mnm5-group of (c)mnm5s2U34 grow poorly especially at low temperature and do not grow at all at 15°C in both rich and glucose minimal media...
2017: PloS One
https://www.readbyqxmd.com/read/28429856/glycosyltransferase-cascades-for-natural-product-glycosylation-use-of-plant-instead-of-bacterial-sucrose-synthases-improves-the-udp-glucose-recycling-from-sucrose-and-udp
#8
Alexander Gutmann, Alexander Lepak, Margo Diricks, Tom Desmet, Bernd Nidetzky
Natural product glycosylations by Leloir glycosyltransferases (GTs) require expensive nucleotide-activated sugars as substrates. Sucrose synthase (SuSy) converts sucrose and uridine 5'-diphosphate (UDP) into UDP-glucose. Coupling of SuSy and GT reactions in one-pot cascade transformations creates a UDP cycle, which regenerates the UDP-glucose continuously and so makes it an expedient donor for glucoside production. Here we compare SuSys with divergent kinetic characteristics for UDP-glucose recycling in the synthesis of the natural C-glucoside nothofagin...
April 21, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28418861/brain-derived-neurotrophic-factor-involved-epigenetic-repression-of-ugt2b7-in-colorectal-carcinoma-a-mechanism-to-alter-morphine-glucuronidation-in-tumor
#9
Zi-Zhao Yang, Li Li, Ming-Cheng Xu, Hai-Xing Ju, Miao Hao, Jing-Kai Gu, Zai-Jie Jim Wang, Hui-Di Jiang, Lu-Shan Yu, Su Zeng
Uridine diphosphate-glucuronosyltransferase (UGT) 2B7, as one of significant drug enzymes, is responsible on the glucuronidation of abundant endobiotics or xenobiotics. We here report that it is markedly repressed in the tumor tissues of colorectal carcinoma (CRC) patients. Accordingly, morphine in CRC cells will stimulate the expression of its main metabolic enzyme, UGT2B7 during tolerance generation by activating the positive signals in histone 3, especially for trimethylated lysine 27 (H3K4Me3) and acetylated lysine 4 (H3K27Ac)...
March 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28411814/nanocoating-cellulose-paper-based-microextraction-combined-with-nanospray-mass-spectrometry-for-rapid-and-facile-quantitation-of-ribonucleosides-in-human-urine
#10
Lingzhong Wan, Haijing Zhu, Yafeng Guan, Guangming Huang
A rapid and facile analytical method for quantification of ribonucleosides in human urine was developed by the combination of nanocoating cellulose paper based microextraction and nanoelectrospray ionization-tandem mass spectrometry (nESI-MS/MS). Cellulose paper used for microextraction was modified by nano-precision deposition of uniform ultrathin zirconia gel film using a sol-gel process. Due to the large surface area of the cellulose paper and the strong affinity between zirconia and the cis-diol compounds, the target analytes were selectively extracted from the complex matrix...
July 1, 2017: Talanta
https://www.readbyqxmd.com/read/28411281/long-term-stability-of-cryopreserved-human-hepatocytes-evaluation-of-phase-i-and-ii-drug-metabolizing-enzyme-activities-and-cyp3a4-5-induction-for-more-than-a-decade
#11
Miyako Sudo, Mitsuhiro Nishihara, Junzo Takahashi, Satoru Asahi
We evaluated the long term stability of hepatocytes stored in vapor phase of liquid nitrogen for their viability, cytochrome P450 (CYP) 1A2 activity, CYP3A4/5 activity, uridine diphosphate-glucuronosyl transferase (UGT) activity, sulfotransferase (SULT) activity, and CYP3A4/5 induction during 14 years of preservation. No substantial degradation of viability, CYP1A2 activity, UGT activity, or CYP3A4/5 induction was observed. CYP3A4/5 activity showed a slight decrease after 7 years of storage, and SULT activity gradually decreased during storage, although substantial activities remained even after 14 years...
April 14, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28406614/vinyluridine-as-a-versatile-chemoselective-handle-for-the-posttranscriptional-chemical-functionalization-of-rna
#12
Jerrin Thomas George, Seergazhi G Srivatsan
Development of modular and efficient methods to functionalize RNA with biophysical probes is very important to advance the understanding of the structural and functional relevance of RNA in various cellular events. Herein we demonstrate a two-step bioorthogonal chemical functionalization approach for the conjugation of multiple probes onto RNA transcripts using a 5-vinyl-modified uridine nucleotide analog (VUTP). VUTP, containing a structurally non-invasive and versatile chemoselective handle, was efficiently incorporated into RNA transcripts by in vitro transcription reactions...
April 13, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28399191/association-between-uridin-diphosphate-glucuronosylotransferase-1a1-ugt1a1-gene-polymorphism-and-neonatal-hyperbilirubinemia
#13
Katarzyna Mazur-Kominek, Tomasz Romanowski, Krzysztof Bielawski, Bogumiła Kiełbratowska, Krzysztof Preis, Iwona Domżalska-Popadiuk, Magdalena Słomińska-Frączek, Katarzyna Sznurkowska, Joanna Renke, Katarzyna Plata-Nazar, Karolina Śledzińska, Grażyna Sikorska-Wiśniewska, Magdalena Góra-Gębka, Anna Liberek
OBJECTIVE: To assess the prevalence of UGT1A1*28 and UGT1A1*60 polymorphisms of UGT1A1 gene and their association with hyperbilirubinemia. STUDY DESIGN: The study was performed at a single centre - at the Department of Obstetrics of the Medical University of Gdansk in Poland. DNA was isolated from Guthrie cards of 171 infants. Only full term newborns (gestational age 38-42 weeks) were included in the study. Fluorescent molecular probes were used for UGT1A1 promoter variation analysis...
April 12, 2017: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/28398248/adar1-and-microrna-a-hidden-crosstalk-in-cancer
#14
REVIEW
Charles J Cho, Seung-Jae Myung, Suhwan Chang
The evolution of cancer cells is believed to be dependent on genetic or epigenetic alterations. However, this concept has recently been challenged by another mode of nucleotide alteration, RNA editing, which is frequently up-regulated in cancer. RNA editing is a biochemical process in which either Adenosine or Cytosine is deaminated by a group of RNA editing enzymes including ADAR (Adenosine deaminase; RNA specific) or APOBEC3B (Apolipoprotein B mRNA Editing Enzyme Catalytic Subunit 3B). The result of RNA editing is usually adenosine to inosine (A-to-I) or cytidine to uridine (C-to-U) transition, which can affect protein coding, RNA stability, splicing and microRNA-target interactions...
April 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28396694/synthesis-of-umbelliferone-derivatives-in-escherichia-coli-and-their-biological-activities
#15
Luan Luong Chu, Ramesh Prasad Pandey, Haet Nim Lim, Hye Jin Jung, Nguyen Huy Thuan, Tae-Su Kim, Jae Kyung Sohng
BACKGROUND: Umbelliferone, also known as 7-hydroxycoumarin, is a phenolic metabolite found in many familiar plants. Its derivatives have been shown to have various pharmacological and chemo-preventive effects on human health. A uridine diphosphate glycosyltransferase YjiC from Bacillus licheniformis DSM 13, a cytochrome P450BM3 (CYP450 BM3) variant namely mutant 13 (M13) from Bacillus megaterium, and an O-methyltransferase from Streptomyces avermitilis (SaOMT2) were used for modifications of umbelliferone...
2017: Journal of Biological Engineering
https://www.readbyqxmd.com/read/28396433/molecular-basis-for-the-interaction-between-integrator-subunits-ints9-and-ints11-and-its-functional-importance
#16
Yixuan Wu, Todd R Albrecht, David Baillat, Eric J Wagner, Liang Tong
The metazoan Integrator complex (INT) has important functions in the 3'-end processing of noncoding RNAs, including the uridine-rich small nuclear RNA (UsnRNA) and enhancer RNA (eRNA), and in the transcription of coding genes by RNA polymerase II. The INT contains at least 14 subunits, but its molecular mechanism of action is poorly understood, because currently there is little structural information about its subunits. The endonuclease activity of INT is mediated by its subunit 11 (IntS11), which belongs to the metallo-β-lactamase superfamily and is a paralog of CPSF-73, the endonuclease for pre-mRNA 3'-end processing...
April 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28394399/a-single-target-mitochondrial-rna-editing-factor-of-funaria-hygrometrica-can-fully-reconstitute-rna-editing-at-two-sites-in-physcomitrella-patens
#17
Mareike Schallenberg-Rüdinger, Bastian Oldenkott, Manuel Hiss, Phuong Le Trinh, Volker Knoop, Stefan A Rensing
Nuclear-encoded pentatricopeptide repeat (PPR) proteins are key factors for site-specific RNA editing, converting cytidines into uridines in plant mitochondria and chloroplasts. All editing factors in the model moss Physcomitrella patens have a C-terminal DYW domain with similarity to cytidine deaminase. However, numerous editing factors in flowering plants lack such a terminal DYW domain, questioning its immediate role in the pyrimidine base conversion process. Here we further investigate the Physcomitrella DYW-type PPR protein PPR_78, responsible for mitochondrial editing sites cox1eU755SL and rps14eU137SL...
March 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28394309/morf9-increases-the-rna-binding-activity-of-pls-type-pentatricopeptide-repeat-protein-in-plastid-rna-editing
#18
Junjie Yan, Qunxia Zhang, Zeyuan Guan, Qiang Wang, Li Li, Fengying Ruan, Rongcheng Lin, Tingting Zou, Ping Yin
RNA editing is a post-transcriptional process that modifies the genetic information on RNA molecules. In flowering plants, RNA editing usually alters cytidine to uridine in plastids and mitochondria. The PLS-type pentatricopeptide repeat (PPR) protein and the multiple organellar RNA editing factor (MORF, also known as RNA editing factor interacting protein (RIP)) are two types of key trans-acting factors involved in this process. However, how they cooperate with one another remains unclear. Here, we have characterized the interactions between a designer PLS-type PPR protein (PLS)3PPR and MORF9, and found that RNA-binding activity of (PLS)3PPR is drastically increased on MORF9 binding...
April 10, 2017: Nature Plants
https://www.readbyqxmd.com/read/28393936/effect-of-counterions-on-the-micellization-and-monolayer-behaviour-of-cationic-gemini-surfactants
#19
M S Islam, S M Shortall, G M Mekhail, S P Callender, O Madkhali, Z Bharwani, D Ayyash, K Kobernyk, S D Wettig
The effect of various inorganic and organic counterions on the aggregation behavior of gemini surfactants was examined to investigate the dominant influence of the anions on their micellization and aggregation behavior. This study included eight ethanediyl-α,ω-bis-(dimethylhexadecylammonium) gemini surfactants (GS, also known as 16-2-16) having counterions of chloride (Cl(-)), bromide (Br(-)), malate, tartrate, adenosine monophosphate (AMP), guanosine monophosphate (GMP), cytidine monophosphate (CMP), and uridine monophosphate (UMP)...
April 10, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28393624/favored-and-less-favored-codon-anticodon-duplexes-arising-from-the-gc-codon-family-box-encoding-for-alanine-some-computational-perspectives
#20
Martina Devi, R H Duncan Lyngdoh
Alanine is encoded by the four codons of the GC box (GCA, GCG, GCU, and GCC). Known alanine anticodons include the UGC, IGC, and VGC triplets (I = inosine; V = uridine-5-oxyacetic acid). The energy-minimized structures of all possible codon-anticodon combinations involving all the alanine codons GCA, GCG, GCU, and GCC with the alanine anticodons UGC, IGC, and VGC are studied using the AMBER software. Fifteen H-bonded duplex structures arising out of these combinations are studied here, all having Watson-Crick-type base pairs at the first and second codon positions, and a variety of base pairing possibilities at the third (or wobble) position...
April 10, 2017: Journal of Biomolecular Structure & Dynamics
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