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Published on: August 12, 2014
Integrin targeted delivery of gene therapeutics
Rudy L Juliano1, Xin Ming, Osamu Nakagawa
1Division of Molecular Pharmaceutics, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.
Integrins are targeted for delivering anti-cancer agents like antisense and siRNA oligonucleotides. Various methods link these therapeutic molecules to integrin-binding ligands, enhancing their delivery and efficacy.
Area of Science:
- Molecular imaging and targeted drug delivery in oncology.
Background:
- Integrins are crucial cell surface receptors involved in various biological processes.
- Targeting integrins offers a strategy for selective delivery of therapeutic agents.
Purpose of the Study:
- To review recent advancements in targeted delivery of antisense and siRNA oligonucleotides using integrins.
- To explore strategies for enhancing the pharmacological efficacy of therapeutic oligonucleotides.
Main Methods:
- Linking oligonucleotides to high-affinity integrin-binding ligands through chemical conjugation.
- Encapsulating oligonucleotides within lipoplexes and polymeric nanocarriers (e.g., dendrimers).
- Utilizing ligand-integrin interactions for selective cellular uptake and endosomal trafficking.
Main Results:
- Successful association of ligand-oligonucleotide conjugates/complexes with target integrins.
- Internalization via endosomes and subsequent trafficking within the cell.
- Endosomal escape facilitated by endogenous mechanisms or designed membrane disruption.
Conclusions:
- Integrin-targeted delivery systems show promise for enhancing oligonucleotide therapy.
- Diverse conjugation and nanocarrier strategies are available for integrin-mediated delivery.
- This approach holds potential for improving the efficacy of anti-cancer oligonucleotides.
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