Pharmaceutical aspects of hemoglobin-based oxygen carriers

Area of Science:

• Biomedical Engineering
• Pharmacology
• Emergency Medicine

Background:

• Growing concerns over blood-borne infections and donor blood shortages drive the need for artificial oxygen carriers.
• Hemoglobin-based oxygen carriers (HBOCs) are developed as substitutes for red blood cells (RBCs).
• HBOCs offer critical advantages in emergency situations like trauma and war where transfusions are challenging.

Purpose of the Study:

• To review the formulation requirements for HBOCs from a physiological perspective.
• To highlight the unique challenges in developing HBOCs compared to traditional plasma expanders.
• To discuss the critical physico-pharmaceutical and physiological parameters for HBOC efficacy.

Main Methods:

• Review of existing literature on HBOC formulations and physiological requirements.
• Analysis of physico-pharmaceutical parameters relevant to large volume parenterals.
• Evaluation of specific HBOC properties like oxygen affinity and in vivo efficacy.

Main Results:

• HBOC formulation requires careful consideration of physiological and pharmaceutical parameters.
• Key parameters include colloidal oncotic pressure, osmolality, viscosity, sterility, and apyrogenicity.
• Specific HBOC properties such as oxygen affinity and hemoglobin content are crucial for performance.

Conclusions:

• HBOCs present unique formulation challenges due to the active hemoglobin protein.
• Meeting both general parenteral requirements and specific oxygen-carrying needs is essential for HBOC development.
• Further research into HBOC formulation is critical for their successful clinical application.