A Comparison of Focused and Unfocused Ultrasound for Microbubble-Mediated Gene Delivery.

ABSTRACT: We compared focused and unfocused ultrasound-targeted microbubble destruction (UTMD) for delivery of reporter plasmids to the liver and heart in mice. Optimal hepatic expression was seen with double-depth targeting at 5 and 13 mm in vivo, incorporating a low pulse repetition frequency and short pulse duration. Reporter expression was similar, but the transfection patterns were distinct, with intense foci of transfection using focused UTMD (F-UTMD). We then compared both approaches for cardiac delivery and found 10-fold stronger levels of reporter expression for F-UTMD and observed small areas of intense luciferase expression in the left ventricle. Non-linear contrast imaging of the liver before and after insonation also showed a substantially greater change in signal intensity for F-UTMD,

SUBMITTER: Anderson CD 

PROVIDER: S-EPMC8169610 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature