Reality check: lipid-oligonucleotide conjugates for therapeutic applications

Area of Science:

• Oligonucleotide therapeutics
• Drug delivery systems
• Bioconjugation chemistry

Background:

• Oligonucleotide therapeutics show promise but face delivery challenges.
• Lipid conjugation is a strategy to improve oligonucleotide drug-like properties.
• Understanding conjugation's impact on pharmacology is key for clinical development.

Purpose of the Study:

• To describe the origins of lipid conjugation to oligonucleotides.
• To list commonly used lipids for oligonucleotide lipidation.
• To explain the mechanism of enhanced delivery and exposure via lipidation.

Main Methods:

• Review of historical development of lipid-oligonucleotide conjugates.
• Compilation of lipids frequently employed in lipidation strategies.
• Analysis of proposed mechanisms for lipidation-mediated delivery enhancement.

Main Results:

• Lipidation is a method to improve oligonucleotide delivery and exposure.
• Lipidation can potentially modulate cell type-specific delivery.
• Further understanding of covalent modification effects will drive clinical translation.

Conclusions:

• Lipid conjugation is a vital innovation for oligonucleotide therapeutics delivery.
• Lipidated oligonucleotides are poised for increased clinical development.
• This approach may extend to other oligonucleotide modalities if key interactions are preserved.