Detection of mRNA of the cyclin D1 breast cancer marker by a novel duplex-DNA probe

Meirav Segal, Eylon Yavin, Pinhas Kafri, Yaron Shav-Tal, Bilha Fischer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Previously, we have described 5-((4-methoxy-phenyl)-trans-vinyl)-2′- deoxy-uridine, 6, as a fluorescent uridine analogue exhibiting a 3000-fold higher quantum yield (Φ 0.12) and maximum emission (478 nm) which is 170 nm red-shifted as compared to uridine. Here, we utilized 6 for preparation of labeled oligodeoxynucleotide (ODN) probes based on MS2 and cyclin D1 (a known breast cancer mRNA marker) sequences. Cyclin D1-derived labeled-ssODN showed a 9.5-fold decrease of quantum yield upon duplex formation. On the basis of this finding, we developed the ds-NIF (nucleoside with intrinsic fluorescence)-probe methodology for detection of cyclin D1 mRNA, by which the fluorescent probe is released upon recognition of target mRNA by the relatively dark NIF-duplex-probe. Indeed, we successfully detected, a ss-deoxynucleic acid (DNA) variant of cyclin D1 mRNA using a dark NIF-labeled duplex-probe, and monitoring the recognition process by fluorescence spectroscopy and gel electrophoresis. Furthermore, we successfully detected cyclin D1 mRNA in RNA extracted from cancerous human cells, using ds-NIF methodology.

Original languageAmerican English
Pages (from-to)4860-4869
Number of pages10
JournalJournal of Medicinal Chemistry
Issue number12
StatePublished - 27 Jun 2013


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