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Related Experiment Videos

Cell membranes as barriers for antisense constructions.

V G Budker1, D G Knorre, V V Vlassov

  • 1Institute of Bioorganic Chemistry, Siberian Division of the Russian Academy of Sciences, Novosibirsk.

Antisense Research and Development
|January 1, 1992
PubMed
Summary
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Oligonucleotides and polynucleotides can enter cells by binding to lipid membranes, especially with divalent cations. Cellular proteins and CD4 receptors aid uptake, and lipophilic conjugation enhances delivery.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Oligonucleotides and polynucleotides are crucial nucleic acid molecules.
  • Understanding their interaction with cell membranes is key for therapeutic applications.
  • Existing methods for cellular delivery of nucleic acids have limitations.

Purpose of the Study:

  • To review the mechanisms of oligonucleotide and polynucleotide interaction with cell membranes.
  • To explore how these molecules enter eukaryotic cells.
  • To identify strategies for enhancing cellular delivery of oligonucleotides.

Main Methods:

  • Literature review of studies on nucleic acid-membrane interactions.
  • Analysis of factors influencing oligonucleotide binding and uptake.

Related Experiment Videos

  • Evaluation of methods for improving oligonucleotide delivery into cells.

    • Main Results:

    • Oligonucleotides and polynucleotides bind to lipid membranes, facilitated by divalent cations.
    • This binding can lead to spontaneous encapsulation and vesicle formation for membrane transfer.
    • Eukaryotic cells possess surface proteins, including CD4 receptors, that bind nucleic acids, aiding cellular entry.
    • Conjugation to lipophilic groups or encapsulation into membrane carriers enhances oligonucleotide delivery.

    Conclusions:

    • Divalent cations play a critical role in the interaction of oligonucleotides with cell membranes.
    • Cellular uptake mechanisms involve both passive membrane interactions and specific protein binding.
    • Advanced delivery strategies like lipophilic conjugation and encapsulation are effective for improving oligonucleotide bioavailability.