Engineering protein particles for pulmonary drug delivery

Area of Science:

• Pharmaceutical Sciences
• Biotechnology
• Materials Science

Background:

• Pulmonary protein delivery necessitates particles within the 1-5 micrometer aerodynamic size range for effective deep lung deposition.
• Traditional jet-milling techniques are unsuitable for labile proteins due to potential structural damage from weak physical interactions.

Purpose of the Study:

• To explore advanced particle engineering techniques for pulmonary protein delivery.
• To identify methods that produce particles of optimal size and morphology for deep lung deposition without compromising protein integrity.

Main Methods:

• Investigated advanced particle formation techniques including spray drying, spray freeze drying, and supercritical fluid technology.
• Evaluated the impact of excipients and operating conditions on particle characteristics.

Main Results:

• Advanced techniques successfully produced protein particles in the desired 1-5 micrometer range.
• These methods preserved the native conformation of biomolecules, unlike traditional jet-milling.

Conclusions:

• Advanced particle engineering methods are crucial for successful pulmonary protein delivery.
• Careful selection of excipients and process parameters is essential for designing particles that ensure protein stability and efficacy.