Stability of Protein Pharmaceuticals: Recent Advances

Area of Science:

• Biochemistry
• Pharmaceutical Sciences
• Protein Chemistry

Background:

• Significant progress has been made in liquid protein formulation and stabilization.
• Mechanistic understanding of protein-excipient interactions has improved, enabling rational formulation development.
• The field is advancing towards more complex formulations, including high-concentration solutions for subcutaneous delivery and co-formulations.

Purpose of the Study:

• To review recent advances in the formulation and stabilization of therapeutic proteins in the liquid state.
• To discuss the mechanistic understanding of protein-excipient interactions.
• To explore challenges and strategies for complex formulations, particularly high-concentration protein solutions.

Main Methods:

• Review of recent scientific literature on protein formulation and stability.
• Discussion of chemical degradation pathways and physical instability issues.
• Analysis of protein-interface interactions, predictive stability methods, and chemical-physical instability interplay.

Main Results:

• Enhanced understanding of protein degradation and instability mechanisms.
• Development of more rational approaches to protein formulation.
• Insights into strategies for high-concentration and co-formulations of therapeutic proteins.
• While monoclonal antibodies (mAbs) are often studied, principles apply broadly to therapeutic proteins.

Conclusions:

• Advances in understanding protein-excipient interactions facilitate rational formulation design.
• Current research addresses complex formulation challenges like high protein concentrations and co-formulations.
• Knowledge of chemical and physical instability is crucial for developing stable liquid protein therapeutics.