Molecular level insight into intra-solvent interaction effects on protein stability and aggregation

Area of Science:

• Biochemistry and Pharmaceutical Sciences
• Protein Stabilization and Drug Delivery

Background:

• Protein-based therapeutics are a rapidly growing drug sector but face challenges with inherent protein instability.
• Protein aggregation is a common degradation pathway, leading to potentially harmful byproducts.
• Aggregation-suppressing additives are crucial for stabilizing protein therapeutics.

Purpose of the Study:

• To review recent molecular-level studies on how common additives interact with proteins and influence aggregation.
• To provide new insights into additive-additive interactions and their impact on protein-additive interactions.
• To highlight the importance of understanding cosolute effects in protein formulations for enhanced stability.

Main Methods:

• Focus on recent molecular-level investigations of protein-additive interactions.
• Analysis of additive-additive interactions and their contribution to protein stabilization.
• Review of studies demonstrating the development of novel aggregation-suppressing additives.

Main Results:

• Common additives stabilize proteins through specific interactions, with varying effects on aggregation.
• Additive-additive interactions significantly influence protein-additive interactions and overall stability.
• Understanding these complex interactions can lead to the design of more effective protein stabilizers.

Conclusions:

• A deeper understanding of molecular interactions, including additive-additive effects, is essential for optimizing protein therapeutic formulations.
• Tuning intra-solvent interactions through cosolute mixtures can achieve ideal protein stability.
• Knowledge gained from these studies enables the development of novel and improved aggregation-suppressing additives.