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Recent Findings from University of Alberta Has Provided New Information about DNA Research (Sequential Strand Displacement Beacon for Detection of...

July 29, 2014



Recent Findings from University of Alberta Has Provided New Information about DNA Research (Sequential Strand Displacement Beacon for Detection of DNA Coverage on Functionalized Gold Nanoparticies)

By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on DNA Research are presented in a new report. According to news reporting from Edmonton, Canada, by NewsRx journalists, research stated, "Functionalizing nanomaterials for diverse analytical, biomedical, and therapeutic applications requires determination of surface coverage (or density) of DNA on nanomaterials. We describe a sequential strand displacement beacon assay that is able to quantify specific DNA sequences conjugated or coconjugated onto gold nanoparticles (AuNPs)."

The news correspondents obtained a quote from the research from the University of Alberta, "Unlike the conventional fluorescence assay that (DI) DNA requires the target DNA to be fluorescently labeled, the sequential strand displacement beacon method is able to quantify multiple unlabeled DNA oligonucleotides using a single (universal) strand displacement beacon. This unique feature is achieved by introducing two short unlabeled DNA probes for each specific DNA sequence and by performing sequential DNA strand displacement reactions. Varying the relative amounts of the specific DNA sequences and spacing DNA sequences during their coconjugation onto AuNPs results in different densities of the specific DNA on AuNP, ranging from 90 to 230 DNA molecules per AuNP. Results obtained from our sequential strand displacement beacon assay are consistent with those obtained from the conventional fluorescence assays. However, labeling of DNA with some fluorescent dyes, e.g., tetramethylrhodamine, alters DNA density on AuNP. The strand displacement strategy overcomes this problem by obviating direct labeling of the target DNA."

According to the news reporters, the research concluded: "This method has broad potential to facilitate more efficient design and characterization of novel multifunctional materials for diverse applications."

For more information on this research see: Sequential Strand Displacement Beacon for Detection of DNA Coverage on Functionalized Gold Nanoparticies. Analytical Chemistry, 2014;86(12):6138-6143. Analytical Chemistry can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Analytical Chemistry - www.pubs.acs.org/journal/ancham)

Our news journalists report that additional information may be obtained by contacting R.E. Paliwoda, University of Alberta, Dept. of Lab Med & Pathol, Div Analyt & Environm Toxicol, Edmonton, AB T6G 2G3, Canada. Additional authors for this research include F. Li, M.S. Reid, Y.W. Lin and X.C. Le (see also DNA Research).

Keywords for this news article include: Edmonton, Alberta, Canada, North and Central America, DNA Research, Emerging Technologies, Nanomaterial, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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