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Cationic lipids improve antisense oligonucleotide uptake and prevent degradation in cultured cells and in human serum

S Capaccioli1, G Di Pasquale, E Mini

  • 1Institute of General Pathology, Firenze, Italy.

Biochemical and Biophysical Research Communications
|December 15, 1993
PubMed

Insights

Cationic lipids like DOTAP significantly boost cellular uptake and prevent degradation of antisense oligonucleotides (aODN), overcoming key limitations for gene regulation. These findings suggest cationic lipids are promising for aODN delivery.

Area of Science:

  • Biotechnology
  • Molecular Biology
  • Gene Expression Regulation

Background:

  • Antisense oligonucleotides (aODN) show promise for gene regulation but face challenges with cellular uptake and nuclease degradation.
  • Efficient delivery of aODN into cells is critical for their therapeutic and research applications.

Purpose of the Study:

  • To investigate the effect of artificial cationic lipids on the cellular uptake and nuclease-mediated degradation of antisense oligonucleotides (aODN).
  • To evaluate the potential of cationic lipids as vehicles for enhancing aODN delivery and stability.

Main Methods:

  • Experiments were conducted using cell cultures and human serum to assess ODN uptake and degradation in the presence of cationic lipids.
  • The study utilized specific cationic lipids, including DOTAP, DOTMA, and DOGS, to evaluate their impact on ODN behavior.

Main Results:

  • DOTAP enhanced ODN cellular uptake over 25-fold at typical experimental concentrations, suggesting a bypass of saturable endocytosis.
  • Cationic lipids, particularly DOTAP, significantly inhibited ODN degradation by nucleases in both cell cultures and human serum.
  • Other tested cationic lipids (DOTMA, DOGS) demonstrated similar beneficial effects on ODN uptake and stability.

Conclusions:

  • Artificial cationic lipids effectively enhance cellular uptake and protect antisense oligonucleotides from degradation.
  • These lipids show potential as suitable vehicles for antisense oligonucleotide (aODN) delivery, overcoming major biological barriers.
  • The findings support the use of cationic lipids in advancing gene regulation strategies using aODN.

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