Drug-laden Nanobubbles (image) University of Illinois College of Engineering Share Print E-Mail Caption Bexarotene prodrug in nanobubble form is inserted directly into the tumor using a flexible catheter. Ultrasound ablation therapy to 'pop' the bubbles to release the agent. Credit University of Illinois Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.