keyword
MENU ▼
Read by QxMD icon Read
search

DNA glycosylases

keyword
https://www.readbyqxmd.com/read/28647734/mir-4673-modulates-paclitaxel-induced-oxidative-stress-and-loss-of-mitochondrial-membrane-potential-by-targeting-8-oxoguanine-dna-glycosylase-1
#1
Hai-Li Huang, Ya-Peng Shi, Hui-Juan He, Ya-Hong Wang, Ting Chen, La-Wei Yang, Teng Yang, Jie Chen, Jun Cao, Wei-Min Yao, Gang Liu
BACKGROUND: Our previous study identified a novel microRNA, miR-4673, which is upregulated in A549 cells exposed to paclitaxel (PTX). In this study, we investigated the role of miR-4673 in PTX-induced cytotoxicity. METHODS: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, apoptosis assay, 5,5',6,6'-Tetrachloro-1,1',3,3'-tetraethyl-imidacarbocyanine iodide (JC-1) staining and 2',7'-Dichlorofluorescein (DCFH) staining were used to evaluate cell viability, apoptosis, mitochondrial membrane potential (MMP) loss and reactive oxygen species (ROS) generation in A549 and H1299 cells...
June 26, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28634180/a-mutyh-germline-mutation-is-associated-with-small-intestinal-neuroendocrine-tumors
#2
Jan P Dumanski, Chiara Rasi, Peyman Björklund, Hanna Davies, Abir Salwa Ali, Malin Grönberg, Staffan Welin, Halfdan Sorbye, Henning Grønbæk, Janet Cunningham, Lars A Forsberg, Lars Lind, Erik Ingelsson, Peter Stalberg, Per Hellman, Eva Tiensuu Janson
The genetics behind predisposition to small intestinal neuroendocrine tumors (SI-NETs) is largely unknown, but there is growing awareness of a familial form of the disease. We aimed to identify germline mutations involved in the carcinogenesis of SI-NETs. The strategy included next-generation sequencing of exome- and/or whole-genome of blood DNA, and in selected cases tumor DNA, from 24 patients from 15 families with the history of SI-NETs. We identified seven candidate mutations in six genes that were further studied using 215 sporadic SI-NET patients...
June 20, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28631182/association-between-the-8-oxoguanine-dna-glycosylase-gene-ser326cys-polymorphism-and-age-related-cataract-a-systematic-review-and-meta-analysis
#3
Xiao-Cui Liu, Xiao-Hui Guo, Bing Chen, Zhao-Hui Li, Xiao-Fei Liu
PURPOSE: To investigate the association between the 8-oxoguanine DNA glycosylase (OGG1) gene Ser326Cys (rs1052133) polymorphism and age-related cataract (ARC). METHODS: MEDLINE and EMBASE were searched to identify potential studies published before May 19, 2017, investigating the association between the OGG1 gene Ser326Cys polymorphism and ARC risk. The quality of eligible studies was assessed using the Newcastle-Ottawa Scale tool. The association between the OGG1 gene Ser326Cys polymorphism and ARC was analyzed using meta-analysis...
June 19, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28629775/8-oxo-7-8-dihydroguanine-friend-and-foe-epigenetic-like-regulator-versus-initiator-of-mutagenesis
#4
REVIEW
Aaron M Fleming, Cynthia J Burrows
A high flux of reactive oxygen species during oxidative stress results in oxidative modification of cellular components including DNA. Oxidative DNA "damage" to the heterocyclic bases is considered deleterious because polymerases may incorrectly read the modifications causing mutations. A prominent member in this class is the oxidized guanine base 8-oxo-7,8-dihydroguanine (OG) that is moderately mutagenic effecting G→T transversion mutations. Recent reports have identified that formation of OG in G-rich regulatory elements in the promoters of the VEGF, TNFα, and SIRT1 genes can increase transcription via activation of the base excision repair (BER) pathway...
June 9, 2017: DNA Repair
https://www.readbyqxmd.com/read/28623427/blood-concentrations-of-lead-cadmium-mercury-and-their-association-with-biomarkers-of-dna-oxidative-damage-in-preschool-children-living-in-an-e-waste-recycling-area
#5
Xijin Xu, Weitang Liao, Yucong Lin, Yifeng Dai, Zhihua Shi, Xia Huo
Reactive oxygen species (ROS)-induced DNA damage occurs in heavy metal exposure, but the simultaneous effect on DNA repair is unknown. We investigated the influence of co-exposure of lead (Pb), cadmium (Cd), and mercury (Hg) on 8-hydroxydeoxyguanosine (8-OHdG) and human repair enzyme 8-oxoguanine DNA glycosylase (hOGG1) mRNA levels in exposed children to evaluate the imbalance of DNA damage and repair. Children within the age range of 3-6 years from a primitive electronic waste (e-waste) recycling town were chosen as participants to represent a heavy metal-exposed population...
June 16, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28621520/homogeneously-sensitive-detection-of-multiple-dna-glycosylases-with-intrinsically-fluorescent-nucleotides
#6
Yan Zhang, Chen-Chen Li, Bo Tang, Chun-Yang Zhang
DNA glycosylases are responsible for recognition and excision of the damaged bases in the base excision repair pathway, and all mammals express multiple DNA glycosylases to maintain genome stability. However, simultaneous detection of multiple DNA glycosylase still remains a great challenge. Here, we develop a rapid and sensitive fluorescent method for simultaneous detection of uracil DNA glycolase (UDG) and human 8-oxoG DNA glycosylase 1 (hOGG1) using exonuclease-assisted recycling signal amplification in combination with fluorescent bases 2-aminopurine (2-AP) and pyrrolo-dC (P-dC) as the fluorophores...
June 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28613844/assessment-of-dna-binding-and-oxidative-dna-damage-by-acrylonitrile-in-two-rat-target-tissues-of-carcinogenicity-implications-for-mechanism-of-action
#7
Gary Williams, Tetyana Kobets, Jian Dong Duan, Michael J Iatropoulos
Exposure to acrylonitrile induces formation of tumors at multiple sites in rats, with females being more sensitive. The present study assessed possible mechanisms of acrylonitrile tumorigenicity, covalent DNA binding, DNA breakage and oxidative DNA damage, in two target tissues, the brain and Zymbal's glands, of sensitive female Fischer (F344) and Sprague-Dawley (SD) rats. One group received acrylonitrile in drinking water at 100 ppm for 28 days. Two other groups were administered either acrylonitrile in drinking water at 100 ppm or drinking water alone for 27 days, followed by a single oral gavage dose of 11 mg/kg bw 14C-acrylonitrile on day 28...
June 14, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28601074/role-of-glyceraldehyde-3-phosphate-dehydrogenase-gapdh-in-dna-repair
#8
REVIEW
A A Kosova, S N Khodyreva, O I Lavrik
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is widely known as a glycolytic enzyme. Nevertheless, various functions of GAPDH have been found that are unrelated to glycolysis. Some of these functions presume interaction of GAPDH with DNA, but the mechanism of its translocation to the nucleus is not fully understood. When in the nucleus, GAPDH participates in the initiation of apoptosis and transcription of genes involved in antiapoptotic pathways and cell proliferation and plays a role in the regulation of telomere length...
June 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/28599714/effects-of-moderate-alcohol-consumption-on-gene-expression-related-to-colonic-inflammation-and-antioxidant-enzymes-in-rats
#9
DawnKylee S Klarich, Jerrold Penprase, Patricia Cintora, Octavio Medrano, Danielle Erwin, Susan M Brasser, Mee Young Hong
Excessive alcohol consumption is a risk factor associated with colorectal cancer; however, some studies have reported that moderate alcohol consumption may not contribute additional risk for developing colorectal cancer while others suggest that moderate alcohol consumption provides a protective effect that reduces colorectal cancer risk. The purpose of this study was to determine the effects of moderate voluntary alcohol (20% ethanol) intake on alternate days for 3 months in outbred Wistar rats on risk factors associated with colorectal cancer development...
June 2017: Alcohol
https://www.readbyqxmd.com/read/28599464/dna-repair-genes-polymorphisms-and-genetic-susceptibility-to-philadelphia-negative-myeloproliferative-neoplasms-in-a-portuguese-population-the-role-of-base-excision-repair-genes-polymorphisms
#10
Ana P Azevedo, Susana N Silva, João P De Lima, Alice Reichert, Fernando Lima, Esmeraldina Júnior, José Rueff
The role of base excision repair (BER) genes in Philadelphia-negative (PN)-myeloproliferative neoplasms (MPNs) susceptibility was evaluated by genotyping eight polymorphisms [apurinic/apyrimidinic endodeoxyribonuclease 1, mutY DNA glycosylase, earlier mutY homolog (E. coli) (MUTYH), 8-oxoguanine DNA glycosylase 1, poly (ADP-ribose) polymerase (PARP) 1, PARP4 and X-ray repair cross-complementing 1 (XRCC1)] in a case-control study involving 133 Caucasian Portuguese patients. The results did not reveal a correlation between individual BER polymorphisms and PN-MPNs when considered as a whole...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28587419/regulation-of-the-angiotensin-ii-p22phox-reactive-oxygen-species-signaling-pathway-apoptosis-and-8-oxoguanine-dna-glycosylase-1-retrieval-in-hyperoxia-induced-lung-injury-and-fibrosis-in-rats
#11
Yu Wang, Yuxi Zhu, Yudi Zhu, Zhongyi Lu, Feng Xu
The present study was designed to explore the impact of hyperoxia on lung injury and fibrosis via the angiotensin II (AngII)-p22phox-reactive oxygen species (ROS) signaling pathway, apoptosis and 8-oxoguanine-DNA glycosylase 1 (OGG1) repair enzyme. Newborn Sprague-Dawley rats were randomly divided in the newborn air group, newborn hyperoxia group and newborn intervention group, the latter of which was administered the chymotrypsin inhibitor, 2-(5-formylamino-6-oxo-2-phenyl-1, 6-dihydropyrimidine-1-yl)-N-[4-dioxo-1-phenyl-7-(2-pyridyloxy)] 2-heptyl-acetamide (NK3201)...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28575236/monitoring-of-the-spatial-and-temporal-dynamics-of-ber-ssbr-pathway-proteins-including-myh-ung2-mpg-nth1-and-neil1-3-during-dna-replication
#12
Karine Ø Bjørås, Mirta M L Sousa, Animesh Sharma, Davi M Fonseca, Caroline K Søgaard, Magnar Bjørås, Marit Otterlei
Base lesions in DNA can stall the replication machinery or induce mutations if bypassed. Consequently, lesions must be repaired before replication or in a post-replicative process to maintain genomic stability. Base excision repair (BER) is the main pathway for repair of base lesions and is known to be associated with DNA replication, but how BER is organized during replication is unclear. Here we coupled the iPOND (isolation of proteins on nascent DNA) technique with targeted mass-spectrometry analysis, which enabled us to detect all proteins required for BER on nascent DNA and to monitor their spatiotemporal orchestration at replication forks...
May 29, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28570836/the-influence-of-hepatitis-c-virus-therapy-on-the-dna-base-excision-repair-system-of-peripheral-blood-mononuclear-cells
#13
Piotr Czarny, Anna Merecz-Sadowska, Kinga Majchrzak, Maciej Jabłkowski, Janusz Szemraj, Tomasz Śliwiński, Bolesław Karwowski
Hepatitis C virus (HCV) can infect extrahepatic tissues, including lymphocytes, creating reservoir of the virus. Moreover, HCV proteins can interact with DNA damage response proteins of infected cells. In this article we investigated the influence of the virus infection and a new ombitasvir/paritaprevir/ritonavir ± dasabuvir ± ribavirin (OBV/PTV/r ± DSV ± RBV) anti-HCV therapy on the PBMCs (peripheral blood mononuclear cells, mainly lymphocytes) DNA base excision repair (BER) system. BER protein activity was analyzed in the nuclear and mitochondrial extracts (NE and ME) of PBMC isolated from patients before and after therapy, and from subjects without HCV, using modeled double-strand DNA, with 2'-deoxyuridine substitution as the DNA damage...
June 1, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28555658/tet-mediated-active-dna-demethylation-mechanism-function-and-beyond
#14
REVIEW
Xiaoji Wu, Yi Zhang
In mammals, DNA methylation in the form of 5-methylcytosine (5mC) can be actively reversed to unmodified cytosine (C) through TET dioxygenase-mediated oxidation of 5mC to 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC) and 5-carboxylcytosine (5caC), followed by replication-dependent dilution or thymine DNA glycosylase (TDG)-dependent base excision repair. In the past few years, biochemical and structural studies have revealed mechanistic insights into how TET and TDG mediate active DNA demethylation...
May 30, 2017: Nature Reviews. Genetics
https://www.readbyqxmd.com/read/28551381/a-specific-mutational-signature-associated-with-dna-8-oxoguanine-persistence-in-mutyh-defective-colorectal-cancer
#15
Alessandra Viel, Alessandro Bruselles, Ettore Meccia, Mara Fornasarig, Michele Quaia, Vincenzo Canzonieri, Eleonora Policicchio, Emanuele Damiano Urso, Marco Agostini, Maurizio Genuardi, Emanuela Lucci-Cordisco, Tiziana Venesio, Aline Martayan, Maria Grazia Diodoro, Lupe Sanchez-Mete, Vittoria Stigliano, Filomena Mazzei, Francesca Grasso, Alessandro Giuliani, Marta Baiocchi, Roberta Maestro, Giuseppe Giannini, Marco Tartaglia, Ludmil B Alexandrov, Margherita Bignami
8-Oxoguanine, a common mutagenic DNA lesion, generates G:C>T:A transversions via mispairing with adenine during DNA replication. When operating normally, the MUTYH DNA glycosylase prevents 8-oxoguanine-related mutagenesis by excising the incorporated adenine. Biallelic MUTYH mutations impair this enzymatic function and are associated with colorectal cancer (CRC) in MUTYH-Associated Polyposis (MAP) syndrome. Here, we perform whole-exome sequencing that reveals a modest mutator phenotype in MAP CRCs compared to sporadic CRC stem cell lines or bulk tumours...
April 13, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28542301/electronic-cigarette-aerosols-suppress-cellular-antioxidant-defenses-and-induce-significant-oxidative-dna-damage
#16
Vengatesh Ganapathy, Jimmy Manyanga, Lacy Brame, Dehra McGuire, Balaji Sadhasivam, Evan Floyd, David A Rubenstein, Ilangovan Ramachandran, Theodore Wagener, Lurdes Queimado
BACKGROUND: Electronic cigarette (EC) aerosols contain unique compounds in addition to toxicants and carcinogens traditionally found in tobacco smoke. Studies are warranted to understand the public health risks of ECs. OBJECTIVE: The aim of this study was to determine the genotoxicity and the mechanisms induced by EC aerosol extracts on human oral and lung epithelial cells. METHODS: Cells were exposed to EC aerosol or mainstream smoke extracts and DNA damage was measured using the primer anchored DNA damage detection assay (q-PADDA) and 8-oxo-dG ELISA assay...
2017: PloS One
https://www.readbyqxmd.com/read/28541550/integrity-of-immunoglobulin-variable-region-is-supported-by-ganp-during-aid-induced-somatic-hypermutation-in-germinal-center-b-cells
#17
Mohammed Mansour Abbas Eid, Mayuko Shimoda, Shailendra Kumar Singh, Sarah Ameen Almofty, Phuong Pham, Myron F Goodman, Kazuhiko Maeda, Nobuo Sakaguchi
Immunoglobulin (Ig) affinity maturation depends on somatic hypermutation (SHM) in variable (V) regions initiated by activation-induced cytidine deaminase (AID). AID induces transition mutations by C→U deamination on both strands, causing C:G→T:A. Error-prone repairs of U by base excision and mismatch repairs create transversion mutations at C/G and mutations at A/T sites. In Neuberger's model, it remained to clarify how transition/transversion repair is regulated. We investigate role of AID-interacting GANP (germinal-center associated nuclear protein) in IgV SHM profile...
May 24, 2017: International Immunology
https://www.readbyqxmd.com/read/28517932/mechanism-of-discrimination-of-8-oxoguanosine-versus-guanosine-by-escherichia-coli-fpg
#18
Namrata Jayanth, Mrinalini Puranik
The mutagenic 8-oxoguanosine monophosphate, the predominant product of DNA oxidation, is excised by formamidopyrimidine glycosylase (Fpg) in bacteria. The mechanism of recognition of 8-oxodG, which differs subtly from its normal counterpart, guanosine monophosphate (dG), by Escherichia coli Fpg remains elusive due to the lack of structural data of E. coli Fpg bound to 8-oxodG. Here, we present solution-state structure of 8-oxodG oligomer bound to E. coli E3Q Fpg using UV resonance Raman (UVRR) spectroscopy...
June 15, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28514671/evaluation-of-improved-is6110-lamp-assay-for-diagnosis-of-pulmonary-and-extra-pulmonary-tuberculosis
#19
Deepali Joon, Manoj Nimesh, Mandira Varma-Basil, Daman Saluja
In the present study, IS6110 loop mediated isothermal amplification (LAMP) assay was modified using dUTP-UNG (uracil-DNA N-glycosylase) strategy to prevent carryover contamination, and was evaluated using clinical specimens. The clinical specimens were collected from 236 suspected patients of pulmonary tuberculosis and 315 specimens of suspected patients of extra pulmonary tuberculosis. DNA was extracted from specimens and used as template for nucleic acid amplification. The results were evaluated with culture method as gold standard...
May 14, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28514164/the-nonbulky-dna-lesions-spiroiminodihydantoin-and-5-guanidinohydantoin-significantly-block-human-rna-polymerase-ii-elongation-in-vitro
#20
Marina Kolbanovskiy, Moinuddin A Chowdhury, Aditi Nadkarni, Suse Broyde, Nicholas E Geacintov, David A Scicchitano, Vladimir Shafirovich
The most common, oxidatively generated lesion in cellular DNA is 8-oxo-7,8-dihydroguanine, which can be oxidized further to yield highly mutagenic spiroiminodihydantoin (Sp) and 5-guanidinohydantoin (Gh) in DNA. In human cell-free extracts, both lesions can be excised by base excision repair and global genomic nucleotide excision repair. However, it is not known if these lesions can be removed by transcription-coupled DNA repair (TCR), a pathway that clears lesions from DNA that impede RNA synthesis. To determine if Sp or Gh impedes transcription, which could make each a viable substrate for TCR, either an Sp or a Gh lesion was positioned on the transcribed strand of DNA under the control of a promoter that supports transcription by human RNA polymerase II...
June 7, 2017: Biochemistry
keyword
keyword
99895
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"