Instability, stabilization, and formulation of liquid protein pharmaceuticals

Area of Science:

• Biochemistry
• Pharmaceutical Sciences
• Protein Chemistry

Background:

• Protein pharmaceuticals face significant physical and chemical instability, hindering oral administration and requiring specialized storage.
• Instability is a primary reason for the prevalent injection-based delivery of protein drugs, unlike small molecule drugs.
• Achieving adequate shelf life for protein therapeutics often necessitates cold chain storage or freeze-drying.

Purpose of the Study:

• To review recent investigations and advancements in understanding and maximizing protein stability.
• To discuss the fundamental behavior of proteins and their inherent instabilities.
• To explore stabilization methods for proteins in aqueous solutions for liquid pharmaceutical development.

Main Methods:

• Literature review of studies on protein folding, unfolding, denaturation, and instability mechanisms.
• Analysis of various protein stabilization techniques in both aqueous and solid states.
• Examination of protein behavior under processing conditions like freeze-thawing and drying.

Main Results:

• Recent research has significantly advanced the understanding of protein folding dynamics and denaturation processes.
• Multiple strategies for stabilizing proteins in aqueous and solid states have been developed and investigated.
• Key factors influencing chemical and physical protein instabilities have been elucidated.

Conclusions:

• Effective stabilization of proteins is crucial for developing viable liquid protein pharmaceuticals.
• Continued research into protein behavior and stabilization techniques is essential for overcoming drug delivery challenges.
• Understanding protein instabilities in aqueous states is key to improving the shelf-life and administration of protein-based therapeutics.