Detecting Genomic Aberrations by Fluorescence In Situ Hybridization with Quantum Dots-Labeled Probes

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Abstract:

Detection of genomic alterations of cancer genes by fluorescent in situ hybridization (FISH) will provide important information for cancer diagnosis and therapy. To effectively and reliably detect the genomic changes, we prepared novel FISH probes by directly conjugating genomic DNA of genes to semiconductor quantum dot fluorophores (QDs). The generated QD-genomic probes are substantially more photostable than the probes labeled with organic dye and show high intensity in both metaphase and interphase cell. The directly labeling probes allow detection of genomic targets in a fast and simple FISH procedure with high sensitivity and specificity. Furthermore, application of the QD-genomic probes in lung cancer specimens can reliably visualize gene amplification in cancer cells. These results suggest that the QD-FISH probes may offer an effective approach to analyze cancer-related genomic aberrations in basic research and clinical applications.

Keywords: CANCER; DNA PROBE; FLUORESCENT IN SITU HYBRIDIZATION; GENE; QUANTUM DOT

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2007.920

Publication date: December 1, 2007

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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