Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 105, Issue 35, Pages 13039-13044Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0806308105
Keywords
biodistribution; fluorine-18; oxime; radiosynthesis
Categories
Funding
- National Institutes of Health [GM27681, R01-EB001943, R24 CA 92865]
- National Science Foundation Chemistry Research Instrumentation and Facilities Program [CHE-0541745]
- Department of Energy Cooperative Agreement [DE-FC03-02ER63420]
- Friedreich's Ataxia Research Alliance
- California Tobacco-Related Disease Research Program [16FT-0055]
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The biodistribution profiles in mice of two pyrrole-imidazole polyamides were determined by PET. Pyrrole-imidazole polyamides are a class of small molecules that can be programmed to bind a broad repertoire of DNA sequences, disrupt transcription factor-DNA interfaces, and modulate gene expression pathways in cell culture experiments. The F-18-radiolabeled polyamides were prepared by oxime ligation between 4-[F-18]-fluorobenzaldehyde and a hydroxylamine moiety at the polyamide C terminus. Small animal PET imaging of radiolabeled polyamides administered to mice revealed distinct differences in the biodistribution of a S-ring beta-linked polyamide versus an 8-ring hairpin, which exhibited better overall bioavailability. in vivo imaging of pyrrole-imidazole polyamides by PET is a minimum first step toward the translation of polyamide-based gene regulation from cell culture to small animal studies.
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