Pulsatile Drug Delivery System Triggered by Acoustic Radiation Force

Area of Science:

• Biomedical Engineering
• Pharmacology
• Chronobiology

Background:

• Biological systems exhibit circadian rhythms, influencing drug efficacy based on administration timing.
• Chronotherapeutic disorders require treatments synchronized with symptom onset.
• Current drug delivery methods lack precise spatial and temporal control, impacting treatment efficacy and safety.

Purpose of the Study:

• To present a proof of concept for an innovative pulsatile drug delivery system.
• To demonstrate remote triggering of drug release using ultrasound acoustic radiation force.
• To explore the potential for enhanced efficacy and safety in chronotherapy.

Main Methods:

• Development of a pulsatile drug delivery device with a drug-loaded gel and a sliding top.
• Remote triggering mechanism utilizing ultrasound acoustic radiation force.
• Quantification of drug release per triggered event.

Main Results:

• Successfully demonstrated pulsatile drug delivery triggered by ultrasound acoustic radiation force.
• Achieved efficient drug release, releasing up to 20 μg per actuation.
• Validated the use of acoustic radiation force (up to 0.1 N) for controlled drug delivery.

Conclusions:

• Ultrasound-triggered pulsatile drug delivery is a viable method for precise chronotherapy.
• This technology offers potential for improved treatment efficacy and safety compared to traditional methods.
• Further development could lead to advanced targeted and timed therapeutic interventions.