共查询到20条相似文献,搜索用时 31 毫秒
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Background
Image analysis is the first crucial step to obtain reliable results from microarray experiments. First, areas in the image belonging to single spots have to be identified. Then, those target areas have to be partitioned into foreground and background. Finally, two scalar values for the intensities have to be extracted. These goals have been tackled either by spot shape methods or intensity histogram methods, but it would be desirable to have hybrid algorithms which combine the advantages of both approaches. 相似文献2.
Background
Fluorescent data obtained from real-time PCR must be processed by some method of data analysis to obtain the relative quantity of target mRNA. The method chosen for data analysis can strongly influence results of the quantification. 相似文献3.
C. Feng S. Mansouri B.H. Bluhm L.J. du Toit J.C. Correll 《Journal of applied microbiology》2014,117(2):472-484
Aims
To develop multiplex TaqMan real‐time PCR assays for detection of spinach seedborne pathogens that cause economically important diseases on spinach.Methods and Results
Primers and probes were designed from conserved sequences of the internal transcribed spacer (for Peronospora farinosa f. sp. spinaciae and Stemphylium botryosum), the intergenic spacer (for Verticillium dahliae) and the elongation factor 1 alpha (for Cladosporium variabile) regions of DNA. The TaqMan assays were tested on DNA extracted from numerous isolates of the four target pathogens, as well as a wide range of nontarget, related fungi or oomycetes and numerous saprophytes commonly found on spinach seed. Multiplex real‐time PCR assays were evaluated by detecting two or three target pathogens simultaneously. Singular and multiplex real‐time PCR assays were also applied to DNA extracted from bulked seed and single spinach seed.Conclusions
The real‐time PCR assays were species‐specific and sensitive. Singular or multiplex real‐time PCR assays could detect target pathogens from both bulked seed samples as well as single spinach seed.Significance and Impact of the Study
The freeze‐blotter assay that is currently routinely used in the spinach seed industry to detect and quantify three fungal seedborne pathogens of spinach (C. variabile, S. botryosum and V. dahliae) is quite laborious and takes several weeks to process. The real‐time PCR assays developed in this study are more sensitive and can be completed in a single day. As the assays can be applied easily for routine seed inspections, these tools could be very useful to the spinach seed industry. 相似文献4.
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Fiona E McCann Andrew C Palfreeman Melanie Andrews Dany P Perocheau Julia J Inglis Peter Schafer Marc Feldmann Richard O Williams Fionula M Brennan 《Arthritis research & therapy》2010,12(3):R107
Introduction
Type 4 phosphodiesterases (PDE4) play an important role in immune cells through the hydrolysis of the second messenger, cAMP. Inhibition of PDE4 has previously been shown to suppress immune and inflammatory responses, demonstrating PDE4 to be a valid therapeutic target for immune-mediated pathologies. We assessed the anti-inflammatory effects of a novel PDE4 inhibitor, apremilast, in human synovial cells from rheumatoid arthritis (RA) patients, as well as two murine models of arthritis. 相似文献6.
Background
We analysed 48 non-redundant antibiotic target proteins from all bacteria, 22 antibiotic target proteins from E. coli only and 4243 non-drug targets from E. coli to identify differences in their properties and to predict new potential drug targets. 相似文献7.
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Background
We have developed an oligonucleotide microarray (genosensor) utilizing a double tandem hybridization technique to search for 9 point mutations located in the most frequently altered codons of the TP53 gene. Isolated and multiplexed PCR products, 108 and 92 bp long, from exons 7 and 8, respectively, were obtained from 24 different samples. Single-stranded target DNA was then prepared from isolated or multiplexed PCR products, through cyclic DNA synthesis. Independent ssDNA's were annealed with the corresponding pairs of labeled stacking oligonucleotides to create partially duplex DNA having a 7-nt gap, which contains the sequence that will be interrogated by the capture probes forming double tandem hybridization. In the case of multiplexed ssPCR products, only two stacking oligonucleotides were added per target, therefore the gap for the PCR products having two consecutive codons to be interrogated in exon 7 was 12 nt long, so only single tandem hybridization was produced with these respective probes. 相似文献9.
Martin Sturm Michael Hackenberg David Langenberger Dmitrij Frishman 《BMC bioinformatics》2010,11(1):292
Background
Virtually all currently available microRNA target site prediction algorithms require the presence of a (conserved) seed match to the 5' end of the microRNA. Recently however, it has been shown that this requirement might be too stringent, leading to a substantial number of missed target sites. 相似文献10.
Background
Human exome resequencing using commercial target capture kits has been and is being used for sequencing large numbers of individuals to search for variants associated with various human diseases. We rigorously evaluated the capabilities of two solution exome capture kits. These analyses help clarify the strengths and limitations of those data as well as systematically identify variables that should be considered in the use of those data. 相似文献11.
Anke Batsch Andrea Noetel Christian Fork Anita Urban Daliborka Lazic Tina Lucas Julia Pietsch Andreas Lazar Edgar Schömig Dirk Gründemann 《BMC bioinformatics》2008,9(1):95
Background
In real-time PCR, it is necessary to consider the efficiency of amplification (EA) of amplicons in order to determine initial target levels properly. EAs can be deduced from standard curves, but these involve extra effort and cost and may yield invalid EAs. Alternatively, EA can be extracted from individual fluorescence curves. Unfortunately, this is not reliable enough. 相似文献12.
Background
Nuclear DNA sequences provide genetic information that complements studies using mitochondrial DNA. Some 'universal' primer sets have been developed that target introns within protein-coding loci, but many simultaneously amplify introns from paralogous loci. Refining existing primer sets to target a single locus could circumvent this problem. 相似文献13.
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Birte Vester Lykke H Hansen Lars Bo Lundberg B Ravindra Babu Mads D Sørensen Jesper Wengel Stephen Douthwaite 《BMC molecular biology》2006,7(1):19-9
Background
DNAzymes cleave at predetermined sequences within RNA. A prerequisite for cleavage is that the DNAzyme can gain access to its target, and thus the DNAzyme must be capable of unfolding higher-order structures that are present in the RNA substrate. However, in many cases the RNA target sequence is hidden in a region that is too tightly structured to be accessed under physiological conditions by DNAzymes. 相似文献18.
Chiara Parravicini Maria P Abbracchio Piercarlo Fantucci Graziella Ranghino 《BMC structural biology》2010,10(1):8
Background
GPR17 is a hybrid G-protein-coupled receptor (GPCR) activated by two unrelated ligand families, extracellular nucleotides and cysteinyl-leukotrienes (cysteinyl-LTs), and involved in brain damage and repair. Its exploitment as a target for novel neuro-reparative strategies depends on the elucidation of the molecular determinants driving binding of purinergic and leukotrienic ligands. Here, we applied docking and molecular dynamics simulations (MD) to analyse the binding and the forced unbinding of two GPR17 ligands (the endogenous purinergic agonist UDP and the leukotriene receptor antagonist pranlukast from both the wild-type (WT) receptor and a mutant model, where a basic residue hypothesized to be crucial for nucleotide binding had been mutated (R255I) to Ile. 相似文献19.
Characterization of unknown genetic modifications using high throughput sequencing and computational subtraction 总被引:1,自引:0,他引:1
Torstein Tengs Haibo Zhang Arne Holst-Jensen Jon Bohlin Melinka A Butenko Anja Bråthen Kristoffersen Hilde-Gunn Opsahl Sorteberg Knut G Berdal 《BMC biotechnology》2009,9(1):87-6
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