Nuclease-Resistant Ribozymes Decrease Stromelysin mRNA Levels in Rabbit Synovium Following Exogenous Delivery to the Knee Joint

• Published in: Proceedings of the National Academy of Sciences - PNAS Vol. 93; no. 2; pp. 754 - 758
• Main Authors: Flory, Craig M., Pavco, Pamela A., Jarvis, Thale C., Lesch, Mark E., Wincott, Francine E., Beigelman, Leonid, Hunt, Stephen W., Schrier, Denis J.
• Format: Journal Article
• Language: English
• Published: United States National Academy of Sciences of the United States of America 23.01.1996; National Acad Sciences; National Academy of Sciences
• Subjects: Animals; Arthritis; Arthritis - chemically induced; Arthritis - physiopathology; Base Sequence; Dose-Response Relationship, Drug; Gene Expression Regulation, Enzymologic; Genetics; Human resources; In Situ Hybridization; Injections, Intra-Articular; Interleukin-1 - pharmacology; Joint diseases; Knee; Knee joint; Knee Joint - drug effects; Male; Matrix Metalloproteinase 3; Medical treatment; Messenger RNA; Metalloendopeptidases - biosynthesis; Metalloendopeptidases - genetics; Molecular Sequence Data; Molecules; Proteoglycans; Rabbits; Ribonucleases - metabolism; Ribonucleic acid; RNA; RNA, Catalytic - metabolism; RNA, Catalytic - pharmacology; RNA, Messenger - biosynthesis; Synovial membrane; Synovial Membrane - drug effects
• ISSN: 0027-8424; 1091-6490
• DOI: 10.1073/pnas.93.2.754

Catalytic RNA molecules, or ribozymes, have generated significant interest as potential therapeutic agents for controlling gene expression. Although ribozymes have been shown to work in vitro and in cellular assays, there are no reports that demonstrate the efficacy of synthetic, stabilized ribozymes delivered in vivo. We are currently utilizing the rabbit model of interleukin 1-induced arthritis to assess the localization, stability, and efficacy of exogenous antistromelysin hammerhead ribozymes. The matrix metalloproteinase stromelysin is believed to be a key mediator in arthritic diseases. It seems likely therefore that inhibiting stromelysin would be a valid therapeutic approach for arthritis. We found that following intraarticular administration ribozymes were taken up by cells in the synovial lining, were stable in the synovium, and reduced synovial interleukin 1α -induced stromelysin mRNA. This effect was demonstrated with ribozymes containing various chemical modifications that impart nuclease resistance and that recognize several distinct sites on the message. Catalytically inactive ribozymes were ineffective, thus suggesting a cleavage-mediated mechanism of action. These results suggest that ribozymes may be useful in the treatment of arthritic diseases characterized by dysregulation of metalloproteinase expression.