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Related Experiment Videos

Transdermal delivery of antisense compounds.

R M Brand1, P L Iversen

  • 1Department of Biological Systems Engineering, University of Nebraska, Lincoln, NE, USA.

Advanced Drug Delivery Reviews
|October 18, 2000
PubMed
Summary

Antisense oligonucleotides can be delivered non-invasively via the skin. Combining iontophoresis with potent C-5 propyne modifications effectively inhibited gene expression, showing promise for antisense therapy.

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Area of Science:

  • Pharmacology
  • Molecular Biology
  • Drug Delivery

Background:

  • Antisense technology offers therapeutic potential and aids gene function studies.
  • Non-invasive, convenient delivery methods for oligonucleotides are highly desirable.
  • Transdermal delivery of oligonucleotides could enable local or systemic treatment.

Purpose of the Study:

  • To evaluate transdermal delivery of antisense oligonucleotides.
  • To investigate methods for enhancing oligonucleotide delivery efficiency.
  • To demonstrate the potential of modified oligonucleotides for gene expression inhibition.

Main Methods:

  • Iontophoretic delivery of phosphorothioate oligonucleotides across hairless mouse skin.
  • Utilizing C-5 propyne base modifications to increase oligonucleotide potency.
  • Assessing CYP3A2 gene expression inhibition in rat liver following combined delivery and modification.

Main Results:

  • Iontophoresis alone showed limitations in delivering sufficient oligonucleotides.
  • C-5 propyne modifications significantly enhanced oligonucleotide potency.
  • The combination of iontophoresis and potent oligonucleotides selectively inhibited CYP3A2 gene expression in rat liver.

Conclusions:

  • Transdermal delivery of modified antisense oligonucleotides is a viable strategy.
  • Potent oligonucleotides combined with iontophoresis can achieve targeted gene silencing.
  • Further research into neutral charge oligomers and passive transdermal delivery may offer broader applicability.

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