Optimizing the Bioavailability of Subcutaneously Administered Biotherapeutics Through Mechanochemical Drivers.

Area of Science:

• Pharmacology
• Biotechnology
• Drug Delivery Systems

Background:

• Subcutaneous (SQ) administration of biotherapeutics presents advantages like convenience, cost-effectiveness, and automation potential.
• Advances in parenteral devices and drug dispersion additives fuel interest in intravenous (IV) to SQ switching studies.
• Designing SQ studies necessitates understanding complex physiological transport pathways within interstitial, vascular, and lymphatic systems.

Purpose of the Study:

• To review key structural features influencing subcutaneous transport and biodistribution.
• To assess the impact of different drug formulations on SQ delivery.
• To highlight future development areas for SQ biotherapeutic delivery.

Main Methods:

• Expert review of existing literature on subcutaneous drug delivery.
• Analysis of physiological factors governing transport in the subcutaneous space.
• Evaluation of drug formulation effects on biodistribution.

Main Results:

• Identified key structural elements of the subcutaneous space impacting drug transport.
• Assessed the influence of formulation characteristics on drug dispersion and absorption.
• Highlighted the complexity of interstitial, vascular, and lymphatic interactions.

Conclusions:

• Subcutaneous delivery is a promising route for biotherapeutics, requiring a deep understanding of underlying physiology.
• Formulation design is critical for optimizing SQ drug delivery and biodistribution.
• Continued innovation in SQ delivery systems and formulation is anticipated.