Carroll C.N.,University of Oregon |
Carroll C.N.,Oregon Nanoscience and Microtechnologies Institute |
Naleway J.J.,Oregon Nanoscience and Microtechnologies Institute |
Naleway J.J.,Marker Gene Technologies |
And 4 more authors.
Chemical Society Reviews | Year: 2010
This critical review will focus on the application of shape-persistent receptors for anions that derive their rigidity and optoelectronic properties from the inclusion of arylethynyl linkages. It will highlight a few of the design strategies involved in engineering selective and sensitive fluorescent probes and how arylacetylenes can offer a design pathway to some of the more desirable properties of a selective sensor. Additionally, knowledge gained in the study of these receptors in organic media often leads to improved receptor design and the production of chromogenic and fluorogenic probes capable of detecting specific substrates among the multitude of ions present in biological systems. In this ocean of potential targets exists a large number of geometrically distinct anions, which present their own problems to the design of receptors with complementary binding for each preferred coordination geometry. Our interest in targeting charged substrates, specifically how previous work on receptors for cations or neutral guests can be adapted to anions, will be addressed. Additionally, we will focus on the design and development of supramolecular arylethynyl systems, their shape-persistence and fluorogenic or chromogenic optoelectronic responses to complexation. We will also examine briefly how the "chemistry in the cuvet" translates into biological media (125 references). © 2010 The Royal Society of Chemistry.
Marker Gene Technologies | Date: 2013-05-14
The present invention relates to the visualization of acidic organelles based upon organelle enzyme activity. The organelle substrates of the invention are specific for enzyme activity of the organelle and label these organelles, such as lysosomes, rendering them visible and easily observed. Substrates of the present invention include substrates that produce a fluorescent signal. The fluorogenic acidic organelle enzyme substrates of this invention are designed to provide high fluorescence at low pH values and are derivatized to permit membrane permeation through both outer and organelle membranes of intact cells and can be used for staining cells at very low concentrations. They can be used for monitoring enzyme activity in cells at very low concentrations and are not toxic to living cells or tissues.
Marker Gene Technologies | Date: 2012-12-04
A codon optimized and stabilized luciferase gene and a novel recombinant DNA characterized by incorporating this new gene coding for a novel luciferase into a vector DNA for improved activities in mammalian cells, are disclosed. This new luciferase exhibits long-wavelength light emission, as well as improved thermostability and higher expression levels in mammalian cell systems, compared to native luciferase. Assays using this new enzyme for measuring various biological metabolic functions are described.
Agency: National Science Foundation | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 99.96K | Year: 2008
This Small Business Innovation Research (SBIR) Phase I research project aims to develop novel nucleic acid labeling reagents that can be used in living cells to monitor gene expression. Instead of relying on labeling the molecules using fluorescently labeled bases, the proposed approach relies on adding the label to the terminal phosphates. This would have great advantage over existing methods and would be a welcome addition to the tools of molecular analysis. Current detection of the changes in gene expression relies on the labeling of nucleic acids with fluorescent labels, which sometimes interferes with hybridization. Thus development of a technology that allows labeling of the nucleic acids in such a way so as to not affect the molecules? hybridization parameters would be a significant advance. Moreover, such a technology would make quantitiation of the hybridization event easier as the fluorescence intensity of the probe molecules would not be sequence dependent. In addition, the obviation of the need for enzyme incorporation and amplification methods would reduce the time and cost associated with the labeling of probes.
Agency: Department of Health and Human Services | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 99.98K | Year: 2002
DESCRIPTION (provided by applicant): This Small Business Innovation Research Phase I project aims to investigate the feasibility of developing new, sensitive, accurate, and reliable detection methods for genomic DNA or RNA samples that are essential for genomic microarray analysis. If successful, the proposed research will help provide breakthroughs needed to advance the promising medical uses of genomic analysis to determine the pattern of gene expression in live cell assays. In Phase I of this project, Marker Gene Technologies proposes to establish the feasibility of the technology by preparing new labeling reagents and systems capable of directly modifying DNA or RNA oligomers for ultrasensitive fluorescence or chemiluminescent detection. These labeling reagents will be assayed in vitro for their ability to monitor gene expression events in response to biological effects on cell function and to monitor the change in gene expression upon application of drugs and bioactive compounds in a cell-specific manner. In Phase II, these and additional detection reagents and methods will be further tested in a variety of pre-clinical applications for genomic expression analysis combined with drug application. PROPOSED COMMERCIAL APPLICATION: The success of this project opens up enormous commercial possibilities in the fields of medical intervention in genetic diseases, genetic screening of new proteins and drugs in cell-culture systems, and new anti-bacterial and anti-viral agent discovery. In addition, it contributes new information and techniques for basic cell-biology research, and the labeling reagents and techniques produced can be marketed for these research and commercial uses.