Rapid-Screening Differential Scanning Calorimetry for siRNA Duplex Thermal Analysis in Pharmaceutical Drug...

Area of Science:

• Biochemistry
• Pharmaceutical Sciences
• Analytical Chemistry

Background:

• Therapeutic short interfering RNA (siRNA) requires precise thermal characterization for drug development.
• Conventional thermal analysis methods are often limited by sample volume, throughput, and dilution requirements.
• Advancing analytical techniques is crucial for efficient siRNA formulation and stability assessment.

Purpose of the Study:

• To demonstrate the utility of rapid-screening differential scanning calorimetry (RS-DSC) for analyzing therapeutic siRNA duplexes.
• To showcase RS-DSC's advantages over conventional methods in drug discovery and development contexts.
• To provide a roadmap for integrating RS-DSC into chemistry, manufacturing, and controls (CMC) strategies for siRNA therapeutics.

Main Methods:

• Utilized rapid-screening differential scanning calorimetry (RS-DSC) for parallel thermal analysis of 24 samples.
• Applied RS-DSC to various contexts including formulation screening, analytical sample preparation, and simulated in vivo administration.
• Performed direct analysis of siRNA duplexes in different media without requiring dilution.

Main Results:

• RS-DSC enabled high-throughput, low-volume parallel thermal analysis of siRNA duplexes.
• Demonstrated successful application of RS-DSC in formulation screening and simulated in vivo administration.
• Showcased overcoming limitations of conventional techniques, including direct analysis in various media and reduced sample consumption.

Conclusions:

• RS-DSC is a versatile and powerful tool for the thermal analysis of therapeutic siRNA duplexes.
• The technique significantly enhances efficiency in drug discovery and development processes for siRNA.
• RS-DSC provides a valuable approach for developing robust CMC strategies for siRNA-based therapeutics.