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https://www.readbyqxmd.com/read/28324498/telomere-g-overhang-length-measurement-method-2-g-tail-telomere-hpa
#1
Hidetoshi Tahara
Both telomere length and telomere G-tail length are altered in human diseases such as cancer and age-related diseases. While most methods for measurement of G-tail and telomere length require electrophoresis, centrifugation, radioisotope labeling and autoradiography, G-tail telomere HPA provides a convenient and useful tool for the examination of G-tail length with a high-throughput platform using genomic DNA or cell lysate. G-tail telomere HPA may be applicable for clinical diagnostics as well as drug target screening...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28324225/spectrum-of-genetic-variants-of-brca1-and-brca2-in-a-german-single-center-study
#2
Cornelia Meisel, Carolin Eva Sadowski, Daniela Kohlstedt, Katja Keller, Franziska Stäritz, Nannette Grübling, Kerstin Becker, Luisa Mackenroth, Andreas Rump, Evelin Schröck, Norbert Arnold, Pauline Wimberger, Karin Kast
BACKGROUND: Determination of mutation status of BRCA1 and BRCA2 has become part of the clinical routine. However, the spectrum of genetic variants differs between populations. The aim of this study was to deliver a comprehensive description of all detected variants. METHODS: In families fulfilling one of the German Consortium for Hereditary Breast and Ovarian Cancer (GC-HBOC) criteria for genetic testing, one affected was chosen for analysis. DNA of blood lymphocytes was amplified by PCR and prescreened by DHPLC...
March 21, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28323890/establishment-of-transient-gene-expression-systems-in-protoplasts-from-liriodendron-hybrid-mesophyll-cells
#3
Ailing Huo, Zhenyu Chen, Pengkai Wang, Liming Yang, Guangping Wang, Dandan Wang, Suchan Liao, Tielong Cheng, Jinhui Chen, Jisen Shi
Liriodendron is a genus of the magnolia family comprised of two flowering tree species that produce hardwoods of great ecological and economic value. However, only a limited amount of genetic research has been performed on the Liriodendron genus partly because transient or stable transgenic trees have been difficult to produce. In general, transient expression systems are indispensable for rapid, high-throughput screening and systematic characterization of gene functions at a low cost; therefore, development of such a system for Liriodendron would provide a necessary step forward for research on Magnoliaceae and other woody trees...
2017: PloS One
https://www.readbyqxmd.com/read/28319371/expression-of-heterologous-sigma-factor-expands-the-searchable-space-for-biofuel-tolerance-mechanisms
#4
Timothy A Tomko, Mary J Dunlop
Microorganisms can produce hydrocarbons that can serve as replacements or additions to conventional liquid fuels for use in the transportation sector. However, a common problem in the microbial synthesis of biofuels is that these compounds often have toxic effects on the cell. In this study, we focused on mitigating the toxicity of the bio-jet fuel precursor pinene on Escherichia coli. We used genomic DNA from Pseudomonas putida KT2440, which has innate solvent-tolerance properties, to create transgenic libraries in an E...
March 20, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28317879/a-novel-method-for-screening-adenosine-receptor-specific-agonists-for-use-in-adenosine-drug-development
#5
Karlie R Jones, Uimook Choi, Ji-Liang Gao, Robert D Thompson, Larry E Rodman, Harry L Malech, Elizabeth M Kang
Agonists that target the A1, A2A, A2B and A3 adenosine receptors have potential to be potent treatment options for a number of diseases, including autoimmune diseases, cardiovascular disease and cancer. Because each of these adenosine receptors plays a distinct role throughout the body, obtaining highly specific receptor agonists is essential. Of these receptors, the adenosine A2AR and A2BR share many sequence and structural similarities but highly differ in their responses to inflammatory stimuli. Our laboratory, using a combination of specially developed cell lines and calcium release analysis hardware, has created a new and faster method for determining specificity of synthetic adenosine agonist compounds for the A2A and A2B receptors in human cells...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28317242/chemical-screening-identifies-rock-as-a-target-for-recovering-mitochondrial-function-in-hutchinson-gilford-progeria-syndrome
#6
Hyun Tae Kang, Joon Tae Park, Kobong Choi, Hyo Jei Claudia Choi, Chul Won Jung, Gyu Ree Kim, Young-Sam Lee, Sang Chul Park
Hutchinson-Gilford progeria syndrome (HGPS) constitutes a genetic disease wherein an aging phenotype manifests in childhood. Recent studies indicate that reactive oxygen species (ROS) play important roles in HGPS phenotype progression. Thus, pharmacological reduction in ROS levels has been proposed as a potentially effective treatment for patient with this disorder. In this study, we performed high-throughput screening to find compounds that could reduce ROS levels in HGPS fibroblasts and identified rho-associated protein kinase (ROCK) inhibitor (Y-27632) as an effective agent...
March 19, 2017: Aging Cell
https://www.readbyqxmd.com/read/28316883/middle-pleistocene-protein-sequences-from-the-rhinoceros-genus-stephanorhinus-and-the-phylogeny-of-extant-and-extinct-middle-late-pleistocene-rhinocerotidae
#7
Frido Welker, Geoff M Smith, Jarod M Hutson, Lutz Kindler, Alejandro Garcia-Moreno, Aritza Villaluenga, Elaine Turner, Sabine Gaudzinski-Windheuser
BACKGROUND: Ancient protein sequences are increasingly used to elucidate the phylogenetic relationships between extinct and extant mammalian taxa. Here, we apply these recent developments to Middle Pleistocene bone specimens of the rhinoceros genus Stephanorhinus. No biomolecular sequence data is currently available for this genus, leaving phylogenetic hypotheses on its evolutionary relationships to extant and extinct rhinoceroses untested. Furthermore, recent phylogenies based on Rhinocerotidae (partial or complete) mitochondrial DNA sequences differ in the placement of the Sumatran rhinoceros (Dicerorhinus sumatrensis)...
2017: PeerJ
https://www.readbyqxmd.com/read/28315952/kinetic-analysis-size-profiling-and-bioenergetic-association-of-dna-released-by-selected-cell-lines-in-vitro
#8
Janine Aucamp, Abel J Bronkhorst, Dimetrie L Peters, Hayley C Van Dyk, Francois H Van der Westhuizen, Piet J Pretorius
Although circulating DNA (cirDNA) analysis shows great promise as a screening tool for a wide range of pathologies, numerous stumbling blocks hinder the rapid translation of research to clinical practice. This is related directly to the inherent complexity of the in vivo setting, wherein the influence of complex systems of interconnected cellular responses and putative DNA sources creates a seemingly arbitrary representation of the quantitative and qualitative properties of the cirDNA in the blood of any individual...
March 18, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28315637/trpm4-non-selective-cation-channel-variants-in-long-qt-syndrome
#9
Thomas Hof, Hui Liu, Laurent Sallé, Jean-Jacques Schott, Corinne Ducreux, Gilles Millat, Philippe Chevalier, Vincent Probst, Romain Guinamard, Patrice Bouvagnet
BACKGROUND: Long QT syndrome (LQTS) is an inherited arrhythmic disorder characterized by prolongation of the QT interval, a risk of syncope, and sudden death. There are already a number of causal genes in LQTS, but not all LQTS patients have an identified mutation, which suggests LQTS unknown genes. METHODS: A cohort of 178 LQTS patients, with no mutations in the 3 major LQTS genes (KCNQ1, KCNH2, and SCN5A), was screened for mutations in the transient potential melastatin 4 gene (TRPM4)...
March 18, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28315618/interaction-of-vasicine-with-calf-thymus-dna-molecular-docking-spectroscopic-and-differential-scanning-calorimetric-insights
#10
Sai Murali R S, Sai Siddhardha R S, Rajesh Babu D, Venketesh S, Basavaraju R, Nageswara Rao G
The present study brings out the interaction between vasicine, an alkaloid and Adhatoda vasica Nees with double stranded DNA. The physico-chemical interaction between small molecules and nucleic acids is a major area of focus in screening drugs against various cancers. Molecular probing in our study using Molecular Operating Environment (MOE) has revealed interaction of vasicine with DNA double helix. Here we report the interaction of vasicine with Calf thymus DNA. We present for the first time the results obtained from UV-visible, fluorescence spectroscopic and differential scanning calorimetric techniques that suggest a moderate to strong electrostatic, hydrophobic and van der Waals interactions mediating the DNA binding properties of vasicine, leading to disruption of DNA secondary structure...
March 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28315507/polymorphisms-and-mutations-in-gstp1-rad51-xrcc1-and-xrcc3-genes-in-breast-cancer-patients
#11
Mazhar Salim Al Zoubi, Katia Zavaglia, Chiara Mazanti, Mohammad Al Hamad, Khalid Al Batayneh, Alaa A A Aljabali, Generoso Bevilacqua
BACKGROUND: Genotoxic factors, including ionizing radiation and oxidative stress, are associated with genomic instability and development of breast cancer (BC). The homologous recombination DNA repair (HRR) pathway, base excision repair (BER) mechanism, and antioxidative enzymes are required as defense mechanisms against these DNA damaging agents. GSTP1, XRCC1, XRCC3 and RAD51 proteins are essential components of antioxidation, BER and HRR of DNA, respectively. Deficiencies in BER, HRR and antioxidation pathways are involved in the progression of cancer...
March 6, 2017: International Journal of Biological Markers
https://www.readbyqxmd.com/read/28315326/identification-of-parp14-inhibitors-using-novel-methods-for-detecting-auto-ribosylation
#12
Mariko Yoneyama-Hirozane, Shin-Ichi Matsumoto, Yukio Toyoda, Singh Saikatendu Kumar, Yumi Zama, Kazuko Yonemori, Motomi Oonishi, Tsuyoshi Ishii, Tomohiro Kawamoto
Poly(ADP-ribose) polymerases (PARPs) use nicotinamide adenine dinucleotide (NAD(+)) as a co-substrate to transfer ADP-ribose when it releases nicotinamide as the metabolized product. Enzymes of the PARP family play key roles in detecting and repairing DNA, modifying chromatin, regulating transcription, controlling energy metabolism, and inducing cell death. PARP14, the original member of the PARP family, has been reported to be associated with the development of inflammatory diseases and various cancer types, making it a potential therapeutic target...
March 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28306242/excision-repair-initiated-enzyme-assisted-bicyclic-cascade-signal-amplification-for-ultrasensitive-detection-of-uracil-dna-glycosylase
#13
Li-Juan Wang, Ming Ren, Qianyi Zhang, Bo Tang, Chun-Yang Zhang
Uracil-DNA glycosylase (UDG) is an important base excision repair (BER) enzyme responsible for the repair of uracil-induced DNA lesion and the maintenance of genomic integrity, while the aberrant expression of UDG is associated with a variety of cancers. Thus the accurate detection of UDG activity is essential to biomedical research and clinical diagnosis. Here, we develop a fluorescent method for ultrasensitive detection of UDG activity using excision repair-initiated enzyme-assisted bicyclic cascade signal amplification...
March 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28303888/dna-methylation-signatures-in-peripheral-blood-strongly-predict-all-cause-mortality
#14
Yan Zhang, Rory Wilson, Jonathan Heiss, Lutz P Breitling, Kai-Uwe Saum, Ben Schöttker, Bernd Holleczek, Melanie Waldenberger, Annette Peters, Hermann Brenner
DNA methylation (DNAm) has been revealed to play a role in various diseases. Here we performed epigenome-wide screening and validation to identify mortality-related DNAm signatures in a general population-based cohort with up to 14 years follow-up. In the discovery panel in a case-cohort approach, 11,063 CpGs reach genome-wide significance (FDR<0.05). 58 CpGs, mapping to 38 well-known disease-related genes and 14 intergenic regions, are confirmed in a validation panel. A mortality risk score based on ten selected CpGs exhibits strong association with all-cause mortality, showing hazard ratios (95% CI) of 2...
March 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28303813/molecular-typing-of-chlamydia-trachomatis-an-overview
#15
REVIEW
Jyoti Rawre, Deepak Juyal, Benu Dhawan
Urogenital infection due to Chlamydia trachomatis (CT) is one of the most common bacterial sexually transmitted infections (STIs) and is a major public health problem worldwide. Molecular characterisation of CT is important for understanding the pathophysiological mechanisms of chlamydial disease and its transmission dynamics in sexual networks. Traditionally, strain typing of CT was based on serotyping methods characterising the major outer membrane protein (MOMP). With the advent of polymerase chain reaction and sequencing the era of molecular typing began...
January 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28303677/examination-of-crispr-cas9-design-tools-and-the-effect-of-target-site-accessibility-on-cas9-activity
#16
Ciaran M Lee, Timothy H Davis, Gang Bao
The recent adaptation of the CRISPR/Cas9 system for targeted genome engineering has led to its widespread applications in many fields worldwide. In order to better understand the design rules of CRISPR/Cas9 systems, several groups have carried out large library-based screens leading to some insight into sequence preferences among highly active target sites. To facilitate CRISPR/Cas9 design these studies have spawned a plethora of gRNA design tools with algorithms based solely on direct or indirect sequence features...
March 16, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28303356/the-association-of-plasminogen-activator-inhibitor-type-1-pai-1-level-and-pai-1-4g-5g-gene-polymorphism-with-the-formation-and-the-grade-of-endometrial-cancer
#17
Malik Ejder Yıldırım, Savas Karakuş, Hande Küçük Kurtulgan, Hasan Kılıçgün, Serpil Erşan, Sevtap Bakır
Plasminogen activator inhibitor type 1 (PAI-1) is a serine protease inhibitor (Serpine 1), and it inhibits both tissue plasminogen activator and urokinase plasminogen activator which are important in fibrinolysis. We aimed to find whether there is a possible association between PAI-1 level, PAI-1 4G/5G polymorphism, and endometrial cancer. PAI-1 levels in peripheral blood were determined in 82 patients with endometrial carcinoma and 76 female healthy controls using an enzyme-linked immunoassay (ELISA). Then, the genomic DNA was extracted and screened by reverse hybridization procedure (Strip assay) to detect PAI 1 4G/5G polymorphism...
March 16, 2017: Biochemical Genetics
https://www.readbyqxmd.com/read/28303131/multiplexed-single-intact-cell-droplet-digital-pcr-music-ddpcr-method-for-specific-detection-of-enterohemorrhagic-e-coli-ehec-in-food-enrichment-cultures
#18
Tanis C McMahon, Burton W Blais, Alex Wong, Catherine D Carrillo
Foodborne illness attributed to enterohemorrhagic E. coli (EHEC), a highly pathogenic subset of Shiga toxin-producing E. coli (STEC), is increasingly recognized as a significant public health issue. Current microbiological methods for identification of EHEC in foods often use PCR-based approaches to screen enrichment broth cultures for characteristic gene markers [i.e., Shiga toxin (stx) and intimin (eae)]. However, false positives arise when complex food matrices, such as beef, contain mixtures of eae-negative STEC and eae-positive E...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28302528/association-between-enteric-protozoan-parasites-and-gastrointestinal-illness-among-hiv-and-tuberculosis-infected-individuals-in-the-chowke-district-southern-mozambique
#19
María José Irisarri-Gutiérrez, Marta Hernández-de Mingo, Aida de Lucio, Horacio Gil, Lucía Morales, Raimundo Seguí, Edy Nacarapa, Carla Muñoz-Antoli, Fernando Jorge Bornay-Llinares, José Guillermo Esteban, David Carmena
Human immune deficiency virus (HIV) and tuberculosis (TB) infections remain major public health issues globally, particularly in sub-Saharan Africa. Impairment of both cell-mediated and humoral immunity by HIV and/or TB infections may limit the host́s defences against other pathogens, including the diarrheagenic protozoan Cryptosporidium spp., Giardia intestinalis, and Entamoeba histolytica. During September-December 2015 a cross-sectional study was conducted to assess the prevalence and molecular diversity of these enteric parasites among HIV- and/or TB-infected patients at a medical reference centre in Chowke district, southern Mozambique...
March 13, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28302345/newborn-screening-for-six-lysosomal-storage-disorders-in-a-cohort-of-mexican-patients-three-year-findings-from-a-screening-program-in-a-closed-mexican-health-system
#20
Juana Inés Navarrete-Martínez, Ana Elena Limón-Rojas, Maria de Jesús Gaytán-García, Jesús Reyna-Figueroa, Guillermo Wakida-Kusunoki, Ma Del Rocío Delgado-Calvillo, Consuelo Cantú-Reyna, Héctor Cruz-Camino, David Eduardo Cervantes-Barragán
OBJECTIVE: To evaluate the results of a lysosomal newborn screening (NBS) program in a cohort of 20,018 Mexican patients over the course of 3years in a closed Mexican Health System (Petróleos Mexicanos [PEMEX] Health Services). STUDY DESIGN: Using dried blood spots (DBS), we performed a multiplex tandem mass spectrometry enzymatic assay for six lysosomal storage disorders (LSDs) including Pompe disease, Fabry disease, Gaucher disease, mucopolysaccharidosis type I (MPS-I), Niemann-Pick type A/B, and Krabbe disease...
March 9, 2017: Molecular Genetics and Metabolism
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