keyword
MENU ▼
Read by QxMD icon Read
search

Polymerase

keyword
https://www.readbyqxmd.com/read/28934847/participation-of-ccl1-in-snail-positive-fibroblasts-in-colorectal-cancer-contribute-to-5-fluorouracil-paclitaxel-chemoresistance
#1
Ziqian Li, Kaying Chan, Yifei Qi, Linlin Lu, Fen Ning, Mengling Wu, Yuan Wang, Shaohui Cai, Jun Du
Purpose: Cancer-associated fibroblasts (CAFs) activated by cancer cells has a central role in development and malignant biological behavior in colorectal cancer (CRC). Adult fibroblasts do not express Snail, but Snail-positive fibroblasts are discovered in the stroma of malignant CRC and reported to be the key role to chemoresistance. However, the reciprocal effect of CAFs expressed Snail to chemoresistance on CRC cells and the underlying molecular mechanisms are not fully characterized...
September 18, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28934642/physiological-responses-and-gene-expression-changes-in-the-western-mosquitofish-gambusia-affinis-exposed-to-progesterone-at-environmentally-relevant-concentrations
#2
Liping Hou, Hongyan Xu, Guangguo Ying, Yang Yang, Hu Shu, Jianliang Zhao, Xuemei Cheng
Progesterone (P4) is a natural and synthetic steroid, widely distributed in the aquatic environments. It can lead to adverse effects on the endocrine system in aquatic organisms. This study investigated the toxicological effects of exposure to environmentally relevant concentrations (4, 44, and 410ng/L) of progesterone for 42 d on adult female mosquitofish, Gambusia affinis. We performed morphological and histological analyses on gonads, anal fins, liver, and gills after the exposure of mosquito fish to P4...
September 14, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28934494/derivatives-of-bst-like-gss-polymerase-with-improved-processivity-and-inhibitor-tolerance
#3
Igor P Oscorbin, Ekaterina A Belousova, Ulyana A Boyarskikh, Aleksandr I Zakabunin, Evgeny A Khrapov, Maksim L Filipenko
At the moment, one of the actual trends in medical diagnostics is a development of methods for practical applications such as point-of-care testing, POCT or research tools, for example, whole genome amplification, WGA. All the techniques are based on using of specific DNA polymerases having strand displacement activity, high synthetic processivity, fidelity and, most significantly, tolerance to contaminants, appearing from analysed biological samples or collected under purification procedures. Here, we have designed a set of fusion enzymes based on catalytic domain of DNA polymerase I from Geobacillus sp...
September 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28934491/phosphorylation-regulates-human-pol%C3%AE-stability-and-damage-bypass-throughout-the-cell-cycle
#4
Federica Bertoletti, Valentina Cea, Chih-Chao Liang, Taiba Lanati, Antonio Maffia, Mario D M Avarello, Lina Cipolla, Alan R Lehmann, Martin A Cohn, Simone Sabbioneda
DNA translesion synthesis (TLS) is a crucial damage tolerance pathway that oversees the completion of DNA replication in the presence of DNA damage. TLS polymerases are capable of bypassing a distorted template but they are generally considered inaccurate and they need to be tightly regulated. We have previously shown that polη is phosphorylated on Serine 601 after DNA damage and we have demonstrated that this modification is important for efficient damage bypass. Here we report that polη is also phosphorylated by CDK2, in the absence of damage, in a cell cycle-dependent manner and we identify serine 687 as an important residue targeted by the kinase...
September 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28934474/human-dna-polymerase-delta-double-mutant-d316a-e318a-interferes-with-dna-mismatch-repair-in-vitro
#5
Dekang Liu, Jane H Frederiksen, Sascha E Liberti, Anne Lützen, Guido Keijzers, Javier Pena-Diaz, Lene Juel Rasmussen
DNA mismatch repair (MMR) is a highly-conserved DNA repair mechanism, whose primary role is to remove DNA replication errors preventing them from manifesting as mutations, thereby increasing the overall genome stability. Defects in MMR are associated with increased cancer risk in humans and other organisms. Here, we characterize the interaction between MMR and a proofreading-deficient allele of the human replicative DNA polymerase delta, PolδD316A;E318A, which has a higher capacity for strand displacement DNA synthesis than wild type Polδ...
September 19, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28934459/mild-respiratory-illness-among-young-children-caused-by-highly-pathogenic-avian-influenza-a-h5n1-virus-infection-in-dhaka-bangladesh-2011
#6
Apurba Chakraborty, Mahmudur Rahman, M Jahangir Hossain, Salah Uddin Khan, M Sabbir Haider, Rebeca Sultana, Nadia Ali Rimi, M Saiful Islam, Najmul Haider, Ausraful Islam, Ireen Sultana Shanta, Tahmina Sultana, Abdullah Al Mamun, Nusrat Homaira, Doli Goswami, Kamrun Nahar, A S M Alamgir, Mustafizur Rahman, Khondokar Mahbuba Jamil, Eduardo Azziz-Baumgartner, Natosha Simpson, Bo Shu, Stephen Lindstrom, Nancy Gerloff, C Todd Davis, Jaqueline M Katz, Andrea Mikolon, Timothy M Uyeki, Stephen P Luby, Katharine Sturm-Ramirez
Background: In March 2011, a multidisciplinary team investigated 2 human cases of highly pathogenic avian influenza A(H5N1) virus infection, detected through population-based active surveillance for influenza in Bangladesh, to assess transmission and contain further spread. Methods: We collected clinical and exposure history of the case patients and monitored persons coming within 1 m of a case patient during their infectious period. Nasopharyngeal wash specimens from case patients and contacts were tested with real-time reverse-transcription polymerase chain reaction, and virus culture and isolates were characterized...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934436/insights-into-onchocerca-volvulus-population-biology-through-multilocus-immunophenotyping
#7
Carmelle T Norice-Tra, José Ribeiro, Sasisekhar Bennuru, Michael P Fay, Rahul Tyagi, Makedonka Mitreva, Thomas B Nutman
We have developed a serologically based immunophenotyping approach to study Onchocerca volvulus (Ov) population diversity. Using genomic sequence data and polymerase chain reaction-based genotyping, we identified nonsynonymous single-nucleotide polymorphisms (SNPs) in the genes of 16 major immunogenic Ov proteins: Ov-CHI-1/Ov-CHI-2, Ov16, Ov-FAR-1, Ov-CPI-1, Ov-B20, Ov-ASP-1, Ov-TMY-1, OvSOD1, OvGST1, Ov-CAL-1, M3/M4, Ov-RAL-1, Ov-RAL-2, Ov-ALT-1, Ov-FBA-1, and Ov-B8. We assessed the immunoreactivity of onchocerciasis patient sera (n = 152) from the Americas, West Africa, Central Africa, and East Africa against peptides derived from 10 of these proteins containing SNPs...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934434/high-sensitivity-assays-for-plasmodium-falciparum-infection-by-immuno-polymerase-chain-reaction-detection-of-pfideh-and-pfldh-antigens
#8
Jianbing Mu, John F Andersen, Jesus G Valenzuela, Thomas E Wellems
Background: Rapid diagnostic tests based on Plasmodium falciparum histidine-rich protein II (PfHRP-II) and P. falciparum lactate dehydrogenase (PfLDH) antigens are widely deployed for detection of P. falciparum infection; however, these tests often miss cases of low-level parasitemia, and PfHRP-II tests can give false-negative results when P. falciparum strains do not express this antigen. Methods: We screened proteomic data for highly expressed P. falciparum proteins and compared their features to those of PfHRP-II and PfLDH biomarkers...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934425/human-bocavirus-capsid-messenger-rna-detection-in-children-with-pneumonia
#9
Robert Schlaberg, Krow Ampofo, Keith D Tardif, Chris Stockmann, Keith E Simmon, Weston Hymas, Steven Flygare, Brett Kennedy, Anne Blaschke, Karen Eilbeck, Mark Yandell, Jon A McCullers, Derek J Williams, Kathryn Edwards, Sandra R Arnold, Anna Bramley, Seema Jain, Andrew T Pavia
Background: The role of human bocavirus (HBoV) in respiratory illness is uncertain. HBoV genomic DNA is frequently detected in both ill and healthy children. We hypothesized that spliced viral capsid messenger RNA (mRNA) produced during active replication might be a better marker for acute infection. Methods: As part of the Etiology of Pneumonia in the Community (EPIC) study, children aged <18 years who were hospitalized with community-acquired pneumonia (CAP) and children asymptomatic at the time of elective outpatient surgery (controls) were enrolled...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934222/endogenous-rgs14-is-a-cytoplasmic-nuclear-shuttling-protein-that-localizes-to-juxtanuclear-membranes-and-chromatin-rich-regions-of-the-nucleus
#10
Mary Rose Branch, John R Hepler
Regulator of G protein signaling 14 (RGS14) is a multifunctional scaffolding protein that integrates G protein and H-Ras/MAPkinase signaling pathways to regulate synaptic plasticity important for hippocampal learning and memory. However, to date, little is known about the subcellular distribution and roles of endogenous RGS14 in a neuronal cell line. Most of what is known about RGS14 cellular behavior is based on studies of tagged, recombinant RGS14 ectopically overexpressed in unnatural host cells. Here, we report for the first time a comprehensive assessment of the subcellular distribution and dynamic localization of endogenous RGS14 in rat B35 neuroblastoma cells...
2017: PloS One
https://www.readbyqxmd.com/read/28934167/live-attenuated-influenza-vaccine-contains-substantial-and-unexpected-amounts-of-defective-viral-genomic-rna
#11
Philip S Gould, Andrew J Easton, Nigel J Dimmock
The live attenuated influenza vaccine FluMist(®) was withdrawn in the USA by the Centers for Disease Control and Prevention after its failure to provide adequate protective immunity during 2013-2016. The vaccine uses attenuated core type A and type B viruses, reconfigured each year to express the two major surface antigens of the currently circulating viruses. Here Fluenz™ Tetra, the European version of this vaccine, was examined directly for defective-interfering (DI) viral RNAs. DI RNAs are deleted versions of the infectious virus genome, and have powerful biological properties including attenuation of infection, reduction of infectious virus yield, and stimulation of some immune responses...
September 21, 2017: Viruses
https://www.readbyqxmd.com/read/28934138/inhibitory-effects-of-culinary-herbs-and-spices-on-the-growth-of-hca-7-colorectal-cancer-cells-and-their-cox-2-expression
#12
Andrius Jaksevicius, Mark Carew, Calli Mistry, Helmout Modjtahedi, Elizabeth I Opara
It is unclear if the anti-inflammatory properties of culinary herbs and spices (CHS) are linked to their ability to inhibit Colorectal cancer cell (CRC) growth. Furthermore, their therapeutic potential with regards to CRC is unknown. The aim of this study was to establish if the inhibition of HCA-7 CRC cell growth by a selection of culinary herbs and spices (CHS) is linked to the inhibition of the cells' cyclooxygenase-2 (COX-2 )expression, and to investigate their therapeutic potential. CHS inhibited the growth of Human colon adenocarcinoma-7 (HCA-7) cells; the order of potency was turmeric, bay leaf, ginger, sage, and rosemary; their combinations had a synergistic or additive effect on cell growth inhibition...
September 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28934088/accuracy-of-a-rapid-intrapartum-group%C3%A2-b-streptococcus-test-a-new-immunochromatographic-assay
#13
A Delabaere, S Curinier, S Ughetto, L Gibold, R Bonnet, A Rossi, D Gallot
OBJECTIVES: To decrease the incidence of early-onset group B streptococcal (GBS) disease, a culture-based screening of all pregnant women at 35-37 weeks is recommended. This gold standard test requires 24-72hours culture. This delay precludes its use for intrapartum screening. This study assesses a new immunoassay, the DIMA test, for identifying GBS-positive patients in the labor ward. MATERIALS AND METHODS: This was a prospective observational study of 195 pregnant women presenting with full-term labor at a single site in France between June and August 2012...
May 2017: Journal of gynecology obstetrics and human reproduction
https://www.readbyqxmd.com/read/28934029/comparative-proteomics-of-streptococcus-pneumoniae-response-to-vancomycin-treatment
#14
Xiao-Yan Yang, Jing-Yu Xu, Qiu-Xia Wei, Xuesong Sun, Qing-Yu He
Streptococcus pneumoniae is a gram-positive pathogen that causes otitis media, pneumonia, meningitis, and other serious diseases. Vancomycin is one of the most important drugs currently used for the treatment of gram-positive bacterial infections, representing, importantly, the last line of defense against bacteria that have developed resistance to other antibiotics. While primary efforts of most investigations focused on the antibacterial mechanism of vancomycin, few studies have been performed to assess the tolerance mechanism of bacteria to vancomycin...
September 2017: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/28933999/minimal-residual-disease-assessment-in-lymphoma-methods-and-applications
#15
Alex F Herrera, Philippe Armand
Standard methods for disease response assessment in patients with lymphoma, including positron emission tomography and computed tomography scans, are imperfect. In other hematologic malignancies, particularly leukemias, the ability to detect minimal residual disease (MRD) is increasingly influencing treatment paradigms. However, in many subtypes of lymphoma, the application of MRD assessment techniques, like flow cytometry or polymerase chain reaction-based methods, has been challenging because of the absence of readily detected circulating disease or canonic chromosomal translocations...
September 21, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28933854/epigenetic-dna-modification-n6-methyladenine-causes-site-specific-rna-polymerase-ii-transcriptional-pausing
#16
Wei Wang, Liang Xu, Lulu Hu, Jenny Chong, Chuan He, Dong Wang
N6-methyladenine (N6-mA or 6mA) is an epigenetic DNA modification in eukaryotic genomes. In contrast to the well-established roles of 5-methylcytosine for epigenetic regulation of gene expression, the functional roles of N6-mA remain elusive. In particular, the impact of N6-mA modification at DNA template on RNA polymerase II (pol II) transcription elongation is not known. In this work, using the Saccharomyces cerevisiae pol II transcriptional elongation system as a model, we investigated the molecular mechanism of pol II recognition and processing of N6-mA sites via both biochemical and structural approaches...
September 21, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28933690/ictv-virus-taxonomy-profile-cystoviridae
#17
Minna M Poranen, Sari Mäntynen, Ictv Report Consortium
The family Cystoviridae includes enveloped viruses with a tri-segmented dsRNA genome and a double-layered protein capsid. The innermost protein shell is a polymerase complex responsible for genome packaging, replication and transcription. Cystoviruses infect Gram-negative bacteria, primarily plant-pathogenic Pseudomonas syringae strains. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the taxonomy of the Cystoviridae, which is available at http://www.ictv.global/report/cystoviridae...
September 20, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28933688/v2-from-a-curtovirus-is-a-suppressor-of-post-transcriptional-gene-silencing
#18
Ana P Luna, Edgar A Rodríguez-Negrete, Gabriel Morilla, Liping Wang, Rosa Lozano-Durán, Araceli G Castillo, Eduardo R Bejarano
The suppression of gene silencing is a key mechanism for the success of viral infection in plants. DNA viruses from the Geminiviridae family encode several proteins that suppress transcriptional and post-transcriptional gene silencing (TGS/PTGS). In Begomovirus, the most abundant genus of this family, three out of six genome-encoded proteins, namely C2, C4 and V2, have been shown to suppress PTGS, with V2 being the strongest PTGS suppressor in transient assays. Beet curly top virus (BCTV), the model species for the Curtovirus genus, is able to infect the widest range of plants among geminiviruses...
September 21, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28933518/mir-564-promotes-hypertrophic-scar-via-up-regulating-tgf-%C3%AE-1
#19
Long Xiao, Tianyi Tang, Yu Huang, Jianxing Guo
BACKGROUND: To evaluate the role of microRNA564 (miR-564) in the development of hypertrophic scar and investigate the possible mechanism of this process. METHODS: The hypertrophic scar (HS) tissues and adjacent normal skin (NS) tissues were selected from 10 patients. The fibrosis-related proteins were detected via hematoxylin eosin (HE) staining, Masson staining and immunohistochemical detection. The relative expression difference of miR-564 in NS tissues and HS tissues was detected via reverse transcription-polymerase chain reaction (RT-PCR)...
September 20, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/28933484/long-non-coding-rna-snhg17-is-an-unfavourable-prognostic-factor-and-promotes-cell-proliferation-by-epigenetically-silencing-p57-in-colorectal-cancer
#20
Zhonghua Ma, Shengying Gu, Min Song, Changsheng Yan, Bingqing Hui, Hao Ji, Jirong Wang, Jianping Zhang, Keming Wang, Qinghong Zhao
Recently, substantial evidence has demonstrated that long non-coding RNAs (lncRNAs) play critical roles in multiple cancers including colorectal cancer (CRC). Utilizing publicly available lncRNA-expression-profiling data from the Gene Expression Omnibus (GEO) dataset GSE21510, we screened SNHG17 as a new candidate lncRNA associated with CRC development and progression. We further demonstrated that SNHG17 was upregulated in CRC tissues, and that its overexpression was significantly correlated with tumor size, TNM stage, and lymph node metastasis in CRC patients...
September 21, 2017: Molecular BioSystems
keyword
keyword
55177
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"