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Antisense applications for biological control.

Wei-Hua Pan1, Gary A Clawson

  • 1Gittlen Cancer Research Foundation, Hershey Medical Center, Department of Pathology, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033, USA.

Journal of Cellular Biochemistry
|January 28, 2006
PubMed
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Antisense reagents (ASRs), including antisense oligonucleotides (ASOs) and small interfering RNAs (siRNAs), show promise for controlling biological processes. Despite advancements in stability and targeting, the slow progress toward clinical application is primarily due to delivery challenges.

Area of Science:

  • Molecular Biology
  • Therapeutics Development
  • Biotechnology

Background:

  • Antisense reagents (ASRs) offer sequence-specific control over biological processes by targeting RNA molecules.
  • ASRs encompass antisense oligonucleotides (ASOs), ribozymes, DNAzymes, and small interfering RNAs (siRNAs).

Purpose of the Study:

  • To review the experimental applications of ASRs for controlling biological processes.
  • To discuss the evolution, clinical progress, and challenges of ASRs as molecular therapeutics.

Main Methods:

  • ASRs function via Watson-Crick base pairing to target specific RNA sequences.
  • ASOs typically induce RNA degradation via RNase-H or steric hindrance of translation.
  • Ribozymes, DNAzymes, and siRNAs employ distinct mechanisms for RNA cleavage and gene silencing.

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Main Results:

  • Numerous ASRs, predominantly ASOs, have entered early-phase clinical trials, but Phase III efficacy data remains limited.
  • Modifications have improved ASR stability and targeting efficiency.
  • The primary obstacle to ASR therapeutic advancement is the challenge of effective delivery, with ongoing developments in liposomal and nanoparticle formulations.

Conclusions:

  • Ongoing modifications to enhance ASR stability and targeting, coupled with delivery system improvements, maintain their therapeutic potential.
  • The clinical translation of ASRs has been slow, highlighting the persistent need for optimized delivery strategies.