Zusammenfassung
Herkömmliche Krebsmedikamente sind unspezifisch wirksam und schädigen auch gesundes Gewebe. Fortschritte im Verständnis der molekularen Besonderheiten von Krebszellen konnten neue Signaltransduktionswege und deren Regulatoren aufzeigen, die spezifisch am malignen Prozess beteiligt und damit für die Entwicklung neuer Krebsmedikamente von Interesse sind. Antisense-Moleküle, einschließlich herkömmlicher Einzelstrang-Antisense-Oligonukleotide (ASO) und kurzer Interferenz-RNA (siRNA), hemmen die Genexpression v. a. auf der Transkriptionsebene. Sie richten sich spezifisch gegen die genetische Ursache von Krebs und lassen sich besonders gut gegen Onkogene einsetzen, deren Proteine für kleinmolekulare Substanzen wie Proteinkinasehemmer oder für therapeutische Antikörper nicht zugänglich sind. Trotz bisher mäßiger Erfolge in klinischen Studien besteht nach wie vor große Hoffnung, dass ASO und siRNA dank der Identifizierung neuer krebsrelevanter Zielstrukturen und Fortschritte in der Nukleinsäureentwicklung die Krebsbehandlung entscheidend verbessern werden.
Abstract
The efficacy of traditional anti-cancer agents is hampered by toxicity to normal tissues. Recent advances in molecular oncology research have led to the identification of signaling pathways and their regulators implicated in tumor development and progression. Consequently, novel biological agents were designed which specifically target key regulators of the malignant process and are superior to unspecific cytotoxic agents. Antisense molecules comprising conventional single-stranded oligonucleotides (ASO) and small interfering RNA (siRNA) inhibit gene expression mainly on the transcript level. Thus, they specifically target the genetic basis of cancer and are particularly useful for inhibiting the expression of oncogenes the protein products of which are inaccessible to small molecules or inhibitory antibodies. Although antisense oncology trials could not fulfill all expectations so far, recent progress in gene expression profiling and nucleic acid development have raised new hopes that this fascinating gene targeting concept will eventually translate into enhanced clinical efficacy.
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Zangemeister-Wittke, U. Krebsbehandlung mit Antisense-Molekülen. Onkologe 13, 256–262 (2007). https://doi.org/10.1007/s00761-006-1170-z
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DOI: https://doi.org/10.1007/s00761-006-1170-z