Recent advances in analytical separation techniques for therapeutic oligonucleotides

Area of Science:

• Biochemistry
• Analytical Chemistry
• Pharmacology

Background:

• Therapeutic oligonucleotides represent a rapidly growing class of drugs targeting gene expression.
• The expanding market and clinical trials necessitate robust analytical tools for characterization and quality control.
• Oligonucleotide-based therapeutics require stringent separation and purification for regulatory compliance and clinical application.

Purpose of the Study:

• To provide an overview of recent advancements in separation methods for oligonucleotide-based therapeutics.
• To highlight the challenges in analyzing complex impurity profiles of modified oligonucleotides.
• To discuss the application of chromatography and capillary electrophoresis in this field.

Main Methods:

• Review of recent literature on separation techniques for nucleic acid-based therapeutics.
• Focus on chromatography methods (e.g., ion-exchange, reversed-phase).
• Discussion of capillary electrophoresis (CE) techniques.

Main Results:

• Modified oligonucleotides present complex impurity profiles due to synthesis failures and truncated sequences.
• Custom analytical protocols are often required for each oligonucleotide therapeutic.
• Advances in chromatography and CE offer improved separation and characterization capabilities.

Conclusions:

• Reliable analytical tools are essential for the development and quality control of therapeutic oligonucleotides.
• Chromatography and capillary electrophoresis are key techniques for separating and purifying these complex molecules.
• Continued innovation in separation science is vital for the accessibility and regulatory compliance of oligonucleotide therapeutics.