keyword
MENU ▼
Read by QxMD icon Read
search

quantitative biology

keyword
https://www.readbyqxmd.com/read/28806688/concentration-dependent-transcriptome-responses-of-zebrafish-embryos-after-exposure-to-cadmium-cobalt-and-copper
#1
Laura Sonnack, Thorsten Klawonn, Ralf Kriehuber, Henner Hollert, Christoph Schäfers, Martina Fenske
Environmental metals are known to cause harmful effects to fish of which many molecular mechanisms still require elucidation. Particularly concentration dependence of gene expression effects is unclear. Focusing on this matter, zebrafish embryo toxicity tests were used in combination with transcriptomics. Embryos were exposed to three concentrations of copper (CuSO4), cadmium (CdCl2) and cobalt (CoSO4) from just after fertilization until the end of the 48hpf pre- and 96hpf post-hatch stage. The RNA was then analyzed on Agilent's Zebrafish (V3, 4×44K) arrays...
August 2, 2017: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/28806672/a-novel-approach-for-rapidly-and-cost-effectively-assessing-toxicity-of-toxic-metals-in-acidic-water-using-an-acidophilic-iron-oxidizing-biosensor
#2
Shih-Hung Yang, Kuo-Chih Cheng, Vivian Hsiu-Chuan Liao
Contamination by heavy metals and metalloids is a serious environmental and health concern. Acidic wastewaters are often associated with toxic metals which may enter and spread into agricultural soils. Several biological assays have been developed to detect toxic metals; however, most of them can only detect toxic metals in a neutral pH, not in an acidic environment. In this study, an acidophilic iron-oxidizing bacterium (IOB) Strain Y10 was isolated, characterized, and used to detect toxic metals toxicity in acidic water at pH 2...
August 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28806522/development-of-a-recombinant-multifunctional-biomacromolecule-for-targeted-gene-transfer-to-prostate-cancer-cells
#3
Arash Hatefi, Zahra Karjoo, Alireza Nomani
The objective of this study was to genetically engineer a fully functional single chain fusion peptide composed of motifs from diverse biological and synthetic origins that can perform multiple tasks including DNA condensation, cell targeting, cell transfection, particle shielding from immune system and effective gene transfer to prostate tumors. To achieve the objective, a single chain biomacromolecule (vector) consisted of four repetative units of histone H2A peptide, fusogenic peptide GALA, short elastin-like peptide and PC-3 cell targeting peptide was designed...
August 14, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28805909/genomewide-association-study-for-production-and-meat-quality-traits-in-canchim-beef-cattle
#4
G G Santiago, F Siqueira, F F Cardoso, L C A Regitano, R Ventura, B P Sollero, M D Souza, F B Mokry, A B R Ferreira, R A A Torres
The commercial value of the bovine carcass is determined by a set of traits, such as weight, yield, back fat thickness, and marbling; therefore, the genetic improvement of growth, meat, and carcass quality traits is an important tool to add value to the supply chain. Genomewide association studies (GWAS) enable the identification of loci that control phenotypic expression of quantitative traits (QTL). Therefore, the objective of this work was to perform a GWAS to identify genomic regions and genes associated with growth, carcass traits, and meat quality in Canchim beef cattle...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28805827/transcriptional-risk-scores-link-gwas-to-eqtls-and-predict-complications-in-crohn-s-disease
#5
Urko M Marigorta, Lee A Denson, Jeffrey S Hyams, Kajari Mondal, Jarod Prince, Thomas D Walters, Anne Griffiths, Joshua D Noe, Wallace V Crandall, Joel R Rosh, David R Mack, Richard Kellermayer, Melvin B Heyman, Susan S Baker, Michael C Stephens, Robert N Baldassano, James F Markowitz, Mi-Ok Kim, Marla C Dubinsky, Judy Cho, Bruce J Aronow, Subra Kugathasan, Greg Gibson
Gene expression profiling can be used to uncover the mechanisms by which loci identified through genome-wide association studies (GWAS) contribute to pathology. Given that most GWAS hits are in putative regulatory regions and transcript abundance is physiologically closer to the phenotype of interest, we hypothesized that summation of risk-allele-associated gene expression, namely a transcriptional risk score (TRS), should provide accurate estimates of disease risk. We integrate summary-level GWAS and expression quantitative trait locus (eQTL) data with RNA-seq data from the RISK study, an inception cohort of pediatric Crohn's disease...
August 14, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28805708/correlation-of-leukocyte-telomere-length-measurement-methods-in-patients-with-dyskeratosis-congenita-and-in-their-unaffected-relatives
#6
Payal P Khincha, Casey L Dagnall, Belynda Hicks, Kristine Jones, Abraham Aviv, Masayuki Kimura, Hormuzd Katki, Geraldine Aubert, Neelam Giri, Blanche P Alter, Sharon A Savage, Shahinaz M Gadalla
Several methods have been employed to measure telomere length (TL) in human studies. It has been difficult to directly compare the results from these studies because of differences in the laboratory techniques and output parameters. We compared TL measurements (TLMs) by the three most commonly used methods, quantitative polymerase chain reaction (qPCR), flow cytometry with fluorescence in situ hybridization (flow FISH) and Southern blot, in a cohort of patients with the telomere biology disorder dyskeratosis congenita (DC) and in their unaffected relatives (controls)...
August 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28805163/cryptosporidium-in-fish-alternative-sequencing-approaches-and-analyses-at-multiple-loci-to-resolve-mixed-infections
#7
Andrea Paparini, Rongchang Yang, Linda Chen, Kaising Tong, Susan Gibson-Kueh, Alan Lymbery, Una M Ryan
Currently, the systematics, biology and epidemiology of piscine Cryptosporidium species are poorly understood. Here, we compared Sanger ‒ and next-generation ‒ sequencing (NGS), of piscine Cryptosporidium, at the 18S rRNA and actin genes. The hosts comprised 11 ornamental fish species, spanning four orders and eight families. The objectives were: to (i) confirm the rich genetic diversity of the parasite and the high frequency of mixed infections; and (ii) explore the potential of NGS in the presence of complex genetic mixtures...
August 14, 2017: Parasitology
https://www.readbyqxmd.com/read/28804700/abridged-version-of-the-awmf-guideline-for-the-medical-clinical-diagnostics-of-indoor-mould-exposure-s2k-guideline-of-the-german-society-of-hygiene-environmental-medicine-and-preventive-medicine-ghup-in-collaboration-with-the-german-association-of-allergists
#8
Gerhard A Wiesmüller, Birger Heinzow, Ute Aurbach, Karl-Christian Bergmann, Albrecht Bufe, Walter Buzina, Oliver A Cornely, Steffen Engelhart, Guido Fischer, Thomas Gabrio, Werner Heinz, Caroline E W Herr, Jörg Kleine-Tebbe, Ludger Klimek, Martin Köberle, Herbert Lichtnecker, Thomas Lob-Corzilius, Rolf Merget, Norbert Mülleneisen, Dennis Nowak, Uta Rabe, Monika Raulf, Hans Peter Seidl, Jens-Oliver Steiß, Regine Szewszyk, Peter Thomas, Kerttu Valtanen, Julia Hurraß
This article is an abridged version of the AWMF mould guideline "Medical clinical diagnostics of indoor mould exposure" presented in April 2016 by the German Society of Hygiene, Environmental Medicine and Preventive Medicine (Gesellschaft für Hygiene, Umweltmedizin und Präventivmedizin, GHUP), in collaboration with the above-mentioned scientific medical societies, German and Austrian societies, medical associations and experts. Indoor mould growth is a potential health risk, even if a quantitative and/or causal relationship between the occurrence of individual mould species and health problems has yet to be established...
2017: Allergo Journal International
https://www.readbyqxmd.com/read/28804565/thrombospondin-1-inhibits-ossification-of-tissue-engineered-cartilage-constructed-by-adscs
#9
Aiguo Xie, Jixin Xue, Gan Shen, Lanjun Nie
Cartilage tissue engineering provides a new method in the treatment of cartilage defects, and adipose derived stem cells seem to be an ideal seed cell in cartilage tissue engineering because of its characteristics. However, ossification after in vivo implantation of tissue engineered cartilage remains a challenge. Thrombospondin-1 which has been reported to have an inhibitory effect on angiogenesis, may play an important role in inhibiting the ossification of tissue engineered cartilage constructed by adipose derived stem cells...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28804487/the-response-of-phagocytes-to-indoor-air-toxicity
#10
Liisa K Vilén, Janne Atosuo, Esa-Matti Lilius
This perspective presents a viewpoint on potential methods assessing toxicity of indoor air. Until recently, the major techniques to document moldy environment have been microbial isolation using conventional culture techniques for fungi and bacteria as well as in some instances polymerase chain reaction to detect microbial genetic components. However, it has become increasingly evident that bacterial and fungal toxins, their metabolic products, and volatile organic substances emitted from corrupted constructions are the major health risks...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28803708/anti-phospholipid-syndrome-current-opinion-on-mechanisms-involved-laboratory-characterization-and-diagnostic-aspects
#11
REVIEW
Jean Amiral, Marie Peyrafitte, Claire Dunois, Anne Marie Vissac, Jerard Seghatchian
Anti-phospholipid syndrome is a complex and severe clinical situation, associated with symptoms such as recurrent thrombosis, arterial or venous, at any site, pregnancy loss, and other related syndromes. These clinical burdens, are highly variable from patient to patient, and are associated with biological abnormalities, such as the presence of the Lupus Anticoagulant or phospholipid dependent antibodies, confirmed on two occasions at least 12 weeks apart. From the diagnosis standpoint, both, functional (clotting) or immunological assays, are difficult to standardize and to optimize, due to the absence of reference material, or a characteristic clinical group, and international reference preparations...
July 15, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28803568/history-of-child-maltreatment-and-telomere-length-in-immune-cell-subsets-associations-with-stress-and-attachment-related-hormones
#12
Christina Boeck, Sabrina Krause, Alexander Karabatsiakis, Katharina Schury, Harald Gündel, Christiane Waller, Iris-Tatjana Kolassa
Experiencing maltreatment during childhood can have long-lasting consequences for both mental and physical health. Immune cell telomere length (TL) shortening might be one link between child maltreatment (CM) experiences and adverse health outcomes later in life. While the stress hormone cortisol has been associated with TL attrition, the attachment-related hormone oxytocin may promote resilience. In 15 mothers with and 15 age- and body mass index-matched mothers without CM, we assessed TL in peripheral blood mononuclear cells and selected immune cell subsets (monocytes, naive, and memory cytotoxic T cells) by quantitative fluorescence in situ hybridization, as well as peripheral cortisol and oxytocin levels...
August 14, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28803416/rapid-screening-method-for-male-dna-by-using-the-loop-mediated-isothermal-amplification-assay
#13
Masashi Kitamura, Seiji Kubo, Jin Tanaka, Tatsushi Adachi
Screening for male-derived biological material from collected samples plays an important role in criminal investigations, especially those involving sexual assaults. We have developed a loop-mediated isothermal amplification (LAMP) assay targeting multi-repeat sequences of the Y chromosome for detecting male DNA. Successful amplification occurred with 0.5 ng of male DNA under isothermal conditions of 61 to 67 °C, but no amplification occurred with up to 10 ng of female DNA. Under the optimized conditions, the LAMP reaction initiated amplification within 10 min and amplified for 20 min...
August 12, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28803361/toxoplasma-gondii-and-neospora-caninum-induce-different-host-cell-responses-at-proteome-wide-phosphorylation-events-a-step-forward-for-uncovering-the-biological-differences-between-these-closely-related-parasites
#14
Mariwan M M Al-Bajalan, Dong Xia, Stuart Armstrong, Nadine Randle, Jonathan M Wastling
Toxoplasma gondii and Neospora caninum are closely related intracellular protozoan parasites and tissue cyst-forming Coccidia of the phylum Apicomplexa. There are remarkable similarities between the morphology, genomes and transcriptomes of both parasites. Toxoplasma is zoonotic, with a wide host range and is mainly transmitted horizontally between its definitive host, the cat, and its intermediate hosts. Neospora causes disease within a narrow host range and with reduced virulence potential to the hosts. The dog is the definitive host of Neospora and its epidemiology in cattle mainly depends on vertical transmission...
August 12, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28802948/modelling-the-toxicity-of-a-large-set-of-metal-and-metal-oxide-nanoparticles-using-the-ochem-platform
#15
Vasyl Kovalishyn, Natalia Abramenko, Iryna Kopernyk, Larysa Charochkina, Larysa Metelytsia, Igor V Tetko, Willie Peijnenburg, Leonid Kustov
Inorganic nanomaterials have become one of the new areas of modern knowledge and technology and have already found an increasing number of applications. However, some nanoparticles show toxicity to living organisms, and can potentially have a negative influence on environmental ecosystems. While toxicity can be determined experimentally, such studies are time consuming and costly. Computational toxicology can provide an alternative approach and there is a need to develop methods to reliably assess Quantitative Structure-Property Relationships for nanomaterials (nano-QSPRs)...
August 9, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28802623/an-analytical-model-which-determines-the-apparent-t1-for-modified-look-locker-inversion-recovery-analysis-of-the-longitudinal-relaxation-under-the-influence-of-discontinuous-balanced-classical-molli-and-spoiled-gradient-echo-readouts
#16
Thomas Kampf, Theresa Reiter, Wolfgang Rudolf Bauer
Quantitative nuclear magnetic resonance imaging (MRI) shifts more and more into the focus of clinical research. Especially determination of relaxation times without/and with contrast agents becomes the foundation of tissue characterization, e.g. in cardiac MRI for myocardial fibrosis. Techniques which assess longitudinal relaxation times rely on repetitive application of readout modules, which are interrupted by free relaxation periods, e.g. the Modified Look-Locker Inversion Recovery = MOLLI sequence. These discontinuous sequences reveal an apparent relaxation time, and, by techniques extrapolated from continuous readout sequences, a putative real T1 is determined...
August 9, 2017: Zeitschrift Für Medizinische Physik
https://www.readbyqxmd.com/read/28801900/monitoring-promoter-activity-by-flow-cytometry
#17
Taher E I Taher
Genetic reporters have become invaluable tools for indirectly monitoring promoter activities. The quantitative measurement of promoter activities using reporter gene systems is fundamental for pharmaceutical, biomedical, and molecular biology research. Genetic reporters are used not only for measuring promoter activities but also for understanding the mechanisms controlling gene transcription and in the identification, and characterization of cis-acting regulatory elements. Fluorescent reporter proteins including enhanced green fluorescent protein (EGFP ) are reliable for monitoring quantitative underlying differences in promoter activities...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28801899/bioluminescence-monitoring-of-promoter-activity-in-vitro-and-in-vivo
#18
Juliette M K M Delhove, Rajvinder Karda, Kate E Hawkins, Lorna M FitzPatrick, Simon N Waddington, Tristan R McKay
The application of luciferase reporter genes to provide quantitative outputs for the activation of promoters is a well-established technique in molecular biology. Luciferase catalyzes an enzymatic reaction, which in the presence of the substrate luciferin produces photons of light relative to its molar concentration. The luciferase transgene can be genetically inserted at the first intron of a target gene to act as a surrogate for the gene's endogenous expression in cells and transgenic mice. Alternatively, promoter sequences can be excised and/or amplified from genomic sources or constructed de novo and cloned upstream of luciferase in an expression cassette transfected into cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28801104/n-alcohol-length-governs-shift-in-lo-ld-mixing-temperatures-in-synthetic-and-cell-derived-membranes
#19
Caitlin E Cornell, Nicola L C McCarthy, Kandice R Levental, Ilya Levental, Nicholas J Brooks, Sarah L Keller
A persistent challenge in membrane biophysics has been to quantitatively predict how membrane physical properties change upon addition of new amphiphiles (e.g., lipids, alcohols, peptides, or proteins) in order to assess whether the changes are large enough to plausibly result in biological ramifications. Because of their roles as general anesthetics, n-alcohols are perhaps the best-studied amphiphiles of this class. When n-alcohols are added to model and cell membranes, changes in membrane parameters tend to be modest...
August 9, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28800964/the-effect-of-metal-ions-released-from-different-dental-implant-abutment-couples-on-osteoblast-function-and-secretion-of-bone-resorbing-mediators
#20
Ghada O Alrabeah, Peter Brett, Jonathan C Knowles, Haralampos Petridis
OBJECTIVES: The etiology of the reduced marginal bone loss observed around platform-switched implant-abutment connections is not clear but could be related to the release of variable amounts of corrosion products. The present study evaluated the effect of different concentrations of metal ions released from different implant abutment couples on osteoblastic cell viability, apoptosis and expression of genes related to bone resorption. METHODS: Osteoblastic cells were exposed to five conditions of culture media prepared containing metal ions (titanium, aluminum, vanadium, cobalt, chromium and molybdenum) in different concentrations representing the amounts released from platform-matched and platform-switched implant-abutment couples as a result of an earlier accelerated corrosion experiment...
August 4, 2017: Journal of Dentistry
keyword
keyword
88719
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"