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https://www.readbyqxmd.com/read/28641368/glomerular-hyperfiltration-in-obese-african-american-hypertensive-patients-is-associated-with-elevated-urinary-mitochondrial-dna-copy-number
#1
Alfonso Eirin, Ahmed Saad, John R Woollard, Luis A Juncos, David A Calhoun, Hui Tang, Amir Lerman, Stephen C Textor, Lilach O Lerman
BACKGROUND: Glomerular hyperfiltration may contribute to the high incidence of renal disease in Obese African Americans essential hypertensive (ObAAEH) patients, but the precise mechanisms responsible for renal injury have not been elucidated. Mitochondria are important determinants of renal injury in hypertension, and increased levels of mitochondrial DNA (mtDNA) in the urine may indicate renal mitochondrial injury. We hypothesized that urine mtDNA copy numbers would be higher in ObAAEH compared to Caucasian essential hypertensive (CEH) patients...
June 14, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28641314/no-additional-prognostic-value-for-mre11-in-squamous-cell-carcinomas-of-the-anus-treated-with-chemo-radiotherapy
#2
Alexandra K Walker, Christiana Kartsonaki, Elena Collantes, Judith Nicholson, Duncan C Gilbert, Anne E Kiltie
BACKGROUND: The majority of anal cancers (84-95%) are driven by infection with human papillomavirus (HPV). HPV-positive tumours show significantly better responses to chemo-radiotherapy when compared with HPV-negative tumours. HPV infection is linked to alterations in DNA damage response proteins, including MRE11. MRE11 is a potential predictive biomarker for response to radiotherapy in muscle-invasive bladder cancer and may hold predictive power in other cancers. METHODS: Using a previously reported cohort, we evaluated the levels of MRE11 in anal cancer and assessed its predictive value in this disease...
June 22, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28641298/generation-of-a-dna-launched-reporter-replicon-based-on-dengue-virus-type-2-as-a-multipurpose-platform
#3
Jose A Usme-Ciro, Jaime A Lopera, Diego A Alvarez, Luis Enjuanes, Fernando Almazán
No abstract text is available yet for this article.
June 23, 2017: Intervirology
https://www.readbyqxmd.com/read/28641226/evaluation-of-trace-element-concentration-in-cancerous-and-non-cancerous-tissues-of-human-stomach
#4
Shadi Kohzadi, Farshad Sheikhesmaili, Ramesh Rahehagh, Baran Parhizkar, Ebrahim Ghaderi, Hozan Loqmani, Behzad Shahmoradi, Ebrahim Mohammadi, Afshin Maleki
Gastric cancer has a high mortality rate in west of Iran. Various environmental elements are proposed as cancer risk factors including trace elements. Trace elements can induce initiation or progression of carcinogenesis via oxidative stress and DNA injury. The aim of this study was to measure and compare some trace element concentration (Ca, Cu, Fe, As, Mg, Ni, Cd and Cr) in gastric cancer tissues and normal tissues. For this purpose, 35 patients with gastric cancer and 30 without any cancer were biopsied...
June 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28641212/association-of-gene-polymorphisms-of-four-components-of-renin-angiotensin-aldosterone-system-and-preeclampsia-in-south-african-black-women
#5
M Aung, T Konoshita, J Moodley, P Gathiram
OBJECTIVE: To investigate the association of the gene polymorphisms of: angiotensinogen (AGT), renin (REN), angiotensin II receptor 1 (AT1R) and angiotensin II receptor 2 (AT2R), in the pathogenesis of PE in South African Black women. METHODOLOGY (STUDY DESIGN): 603 pregnant women; 246 normotensive and 357 with PE (early-onset=187, late-onset=170), were recruited. Each study group was subdivided into HIV infected and uninfected groups. The distribution and frequencies of gene polymorphisms of AGT (M235T), REN (C-5312T), AT1R (A1166C) and AT2R (C3123A) were determined in purified DNA by Real Time Polymerase Chain Reaction...
May 18, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28641203/current-trends-in-electrochemical-sensing-and-biosensing-of-dna-methylation
#6
REVIEW
Ludmila Krejcova, Lukas Richtera, David Hynek, Jan Labuda, Vojtech Adam
DNA methylation plays an important role in physiological and pathological processes. Several genetic diseases and most malignancies tend to be associated with aberrant DNA methylation. Among other analytical methods, electrochemical approaches have been successfully employed for characterisation of DNA methylation patterns that are essential for the diagnosis and treatment of particular diseases. This article discusses current trends in the electrochemical sensing and biosensing of DNA methylation. Particularly, it provides an overview of applied electrode materials, electrode modifications and biorecognition elements applications with an emphasis on strategies that form the core DNA methylation detection approaches...
June 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28641178/stimulatory-effect-of-aggregatibacter-actinomycetemcomitans-dna-on-proinflammatory-cytokine-expression-by-human-gingival-fibroblasts
#7
Uriel Soto-Barreras, Gabriela Cortés-Sandoval, Ruben Dominguez-Perez, Alejandra Loyola-Leyva, Panfilo-Raymundo Martinez-Rodriguez, Juan Pablo Loyola-Rodriguez
OBJECTIVE: While different virulence factors have been reported of Aggregatibacter actinomycetemcomitans (Aa), there is little information about the stimulatory effect of its DNA. The main purpose of this study was to assess the inflammatory response of human gingival fibroblasts (HGFs) stimulated with A. actinomycetemcomitans DNA. DESIGN: Cytokine levels of IL-6, IL-1α and TNF-α were measured on the supernatant of HGFs activated with 10, 25, 50 and 100μg/ml DNA of Aa during 24h...
June 15, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28641141/rag2-involves-the-ig%C3%AE%C2%BA-locus-demethylation-during-b-cell-development
#8
Caijun Wu, Yanying Dong, Xiaohui Zhao, Ping Zhang, Mingzhe Zheng, Hua Zhang, Shichang Li, Yaofeng Jin, Yunfeng Ma, Huixun Ren, Yanhong Ji
The genes encoding the immunoglobulin κ light chain are assembled during B cell development by V(D)J recombination. For efficient rearrangement, the Igκ locus must undergo a series of epigenetic changes. One such epigenetic mark is DNA methylation. The mechanism that the Igκ locus is selectively demethylated at the pre-B cell stage has not previously been characterized. Here, we employed bisulfite DNA-modification assays to analyze the methylation status of the Igκ locus in primary pre-B cells from RAG-deficient mice with pre-rearranged Igh knock-in allele...
June 19, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28641126/dna-requirements-for-interaction-of-the-c-terminal-region-of-ku80-with-the-dna-dependent-protein-kinase-catalytic-subunit-dna-pkcs
#9
Sarvan Kumar Radhakrishnan, Susan P Lees-Miller
Non-homologous end joining (NHEJ) is the major pathway for the repair of ionizing radiation induced DNA double strand breaks (DSBs) in human cells. Critical to NHEJ is the DNA-dependent interaction of the Ku70/80 heterodimer with the DNA-dependent protein kinase catalytic subunit (DNA-PKcs) to form the DNA-PK holoenzyme. However, precisely how Ku recruits DNA-PKcs to DSBs ends to enhance its kinase activity has remained enigmatic, with contradictory findings reported in the literature. Here we address the role of the Ku80 C-terminal region (CTR) in the DNA-dependent interaction of Ku70/80 with DNA-PKcs using purified components and defined DNA structures...
June 9, 2017: DNA Repair
https://www.readbyqxmd.com/read/28641106/antisense-oligonucleotides-translation-from-mouse-models-to-human-neurodegenerative-diseases
#10
REVIEW
Kathleen M Schoch, Timothy M Miller
Multiple neurodegenerative diseases are characterized by single-protein dysfunction and aggregation. Treatment strategies for these diseases have often targeted downstream pathways to ameliorate consequences of protein dysfunction; however, targeting the source of that dysfunction, the affected protein itself, seems most judicious to achieve a highly effective therapeutic outcome. Antisense oligonucleotides (ASOs) are small sequences of DNA able to target RNA transcripts, resulting in reduced or modified protein expression...
June 21, 2017: Neuron
https://www.readbyqxmd.com/read/28641042/resolving-the-melampsora-epitea-complex
#11
Peng Zhao, Makoto Kakishima, Qi Wang, Lei Cai
Melampsora epitea (Pucciniales, Basidiomycota) has been widely known as the main rust pathogen on willows, but its species boundary has been extremely confusing. Melampsora epitea was often confused with several morphologically similar species, such as M. arctica, M. humilis, and M. epiphylla. Recent DNA-based studies using specimens from North America and Europe suggested that M. epitea was a complex of several phylogenetic species. In this study, we examined the species boundary of M. epitea based on rDNA phylogeny and the general mixed Yule coalescent (GMYC) model from 534 specimens...
May 11, 2017: Mycologia
https://www.readbyqxmd.com/read/28641006/dft-simulation-of-structural-and-optical-properties-of-9-aminoacridine-half-sandwich-ru-ii-rh-iii-and-ir-iii-antitumoural-complexes-and-their-interaction-with-dna
#12
José Pedro Cerón-Carrasco, José Ruiz, Consuelo Vicente, Concepcion de Haro, Delia Bautista, Jose Zuniga, Alberto Requena
In this work, we use DFT-based methods to simulate the chemical structures, optical properties and interaction with DNA of a recently synthesized chelated CˆN 9-aminoacridine arene Ru (II) anticancer agent and two new closely related Rh(III) and Ir(III) complexes using DFT-based methods. Four chemical models and a number of theoretical approaches, which representatively include the PBE0, B97D, ωB97X, ωB97X-D, M06, and M06-L density functionals and the LANL2DZ, def2-SVP, def2- TZVP basis sets, are tested...
June 22, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28640996/a-polyoxometalate-based-radiosensitization-platform-for-treating-hypoxic-tumor-by-attenuating-radio-resistance-and-enhancing-radiation-response
#13
Yuan Yong, Chunfang Zhang, Zhanjun Gu, Jiangfeng Du, Zhao Guo, Xinghua Dong, Jiani Xie, Guangjin Zhang, Xiangfeng Liu, Yuliang Zhao
Radioresistance is one of the undesirable impediments in hypoxia tumor, which sharply diminishes therapeutic effectiveness of radiotherapy and eventually results in the failure of their treatments. An attractive strategy for attenuating radioresistance is developing an ideal radiosensitization system with admirable radiosensitization capacity to attenuate tumor hypoxia and reinforce radiotherapy response in hypoxia tumor. Therefore, we describe the development of Gd-containing polyoxometalates-conjugated chitosan (GdW10@CS nanosphere) as a radiosensitization system for simultanous extrinsic and intrinsic radiosensitization, by generating overabundance cytotoxic reactive oxygen species (ROS) using high energy X-ray stimulation and mediating the hypoxia-inducible factor-1a (HIF-1a) siRNA to down-regulate HIF-1α expression and suppress the broken double-stranded DNA self-healing...
June 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28640936/preparation-single-molecule-manipulation-and-energy-transfer-investigation-of-a-polyfluorene-graft-dna-polymer
#14
Mikael Madsen, Rasmus S Christensen, Abhichart Krissanaprasit, Mette R Bakke, Camilla F Riber, Karina S Nielsen, Alexander Zelikin, Kurt Vesterager Gothelf
Conjugated polymers have been intensively studied due to their unique optical and electronic properties combined with their physical flexibility and scalable bottom up synthesis. While the bulk qualities of conjugated polymers have been extensively utilized in research and industry, the ability to handle and manipulate conjugated polymers at the nanoscale lacks significantly behind. Here we extend the toolbox for controlled manipulation of conjugated polymers through the synthesis of a polyfluorene-DNA graft type polymer (poly(F-DNA))...
June 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28640935/additive-effect-of-radiosensitization-by-2-deoxy-d-glucose-delays-dna-repair-kinetics-and-suppresses-cell-proliferation-in-oral-squamous-cell-carcinoma
#15
Mayumi Kawata, Kazuhiro Ogi, Koyo Nishiyama, Sho Miyamoto, Takafumi Nakagaki, Makoto Shimanishi, Akihiro Miyazaki, Hiroyoshi Hiratsuka
BACKGROUND: It has well known that, compared to normal cells, tumor cells have a different manner of energy metabolism, which influences the sensitivity of radiotherapy (RT). However, whether inhibition of glycolysis enhances the efficacy of radiotherapy is a matter of debate in oral squamous cell carcinoma (OSCC). The aim of this study was to characterize whether the combination of radiotherapy with the glucose inhibitor 2-deoxy-D-glucose (2-DG) affected DNA repair kinetics. METHODS: To compare the synergistic effect of 2-DG, we examined the cell survival after treatment with radiation, 2-DG and a combination of the two in 5 OSCC cell lines and one lip fibroblast cell line, determined using clonogenic survival assay...
June 22, 2017: Journal of Oral Pathology & Medicine
https://www.readbyqxmd.com/read/28640934/substrate-specificity-and-safener-inducibility-of-the-plant-udp-glucose-dependent-family-1-glycosyltransferases-super-family
#16
Melissa Brazier-Hicks, Markus Gershater, David Dixon, Robert Edwards
Plants contain large numbers of family 1 UDP-glucose dependent glycosyltransferases (UGTs), including members that conjugate xenobiotics. Arabidopsis contains 107 UGT genes with 99 family members successfully expressed as glutathione transferase (GST)-fusion proteins in E.coli. A high-throughput catalytic screen was developed based on quantification of the fusion by measuring GST activity. UGT activity using UDP-glucose as donor was then determined using 11 synthetic acceptors bearing hydroxyl, amino and thiol groups that had been shown to undergo conjugation in plant extracts...
June 22, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28640915/physiological-and-genomic-features-of-a-novel-violacein-producing-bacterium-isolated-from-surface-seawater
#17
Yue-Hong Wu, Hong Cheng, Lin Xu, Xiong-Bin Jin, Chun-Sheng Wang, Xue-Wei Xu
Strains JW1T and JW3, isolated from surface seawater of the Arabian Sea, were subjected to polyphasic taxonomic analysis. Cells of both strains were Gram-stain-negative, aerobic, and rod-shaped. They formed violet pigment and produced violacein. On the basis of 16S rRNA gene sequence analysis, strains JW1T and JW3 showed high 16S rRNA gene sequence similarity with Pseudoalteromonas byunsanensis JCM12483T (98.2%), P. shioyasakiensis SE3T (97.8%), P. arabiensis JCM 17292T (97.3%), and P. gelatinilytica NH153T (97...
2017: PloS One
https://www.readbyqxmd.com/read/28640891/baculoviral-delivery-of-crispr-cas9-facilitates-efficient-genome-editing-in-human-cells
#18
Sanne Hindriksen, Arne J Bramer, My Anh Truong, Martijn J M Vromans, Jasmin B Post, Ingrid Verlaan-Klink, Hugo J Snippert, Susanne M A Lens, Michael A Hadders
The CRISPR/Cas9 system is a highly effective tool for genome editing. Key to robust genome editing is the efficient delivery of the CRISPR/Cas9 machinery. Viral delivery systems are efficient vehicles for the transduction of foreign genes but commonly used viral vectors suffer from a limited capacity in the genetic information they can carry. Baculovirus however is capable of carrying large exogenous DNA fragments. Here we investigate the use of baculoviral vectors as a delivery vehicle for CRISPR/Cas9 based genome-editing tools...
2017: PloS One
https://www.readbyqxmd.com/read/28640886/epigenomic-diversification-within-the-genus-lupinus
#19
Karolina Susek, Agnieszka Braszewska-Zalewska, Adam J Bewick, Robert Hasterok, Robert J Schmitz, Barbara Naganowska
Deciphering the various chemical modifications of both DNA and the histone compound of chromatin not only leads to a better understanding of the genome-wide organisation of epigenetic landmarks and their impact on gene expression but may also provide some insights into the evolutionary processes. Although both histone modifications and DNA methylation have been widely investigated in various plant genomes, here we present the first study for the genus Lupinus. Lupins, which are members of grain legumes (pulses), are beneficial for food security, nutrition, health and the environment...
2017: PloS One
https://www.readbyqxmd.com/read/28640876/reliability-and-performance-of-commercial-rna-and-dna-extraction-kits-for-ffpe-tissue-cores
#20
Palak G Patel, Shamini Selvarajah, Karl-Philippe Guérard, John M S Bartlett, Jacques Lapointe, David M Berman, John B A Okello, Paul C Park
Cancer biomarker studies often require nucleic acid extraction from limited amounts of formalin-fixed, paraffin-embedded (FFPE) tissues, such as histologic sections or needle cores. A major challenge is low quantity and quality of extracted nucleic acids, which can limit our ability to perform genetic analyses, and have a significant influence on overall study design. This study was aimed at identifying the most reliable and reproducible method of obtaining sufficient high-quality nucleic acids from FFPE tissues...
2017: PloS One
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