TY - JOUR
T1 - Non-spherical oscillations drive the ultrasound-mediated release from targeted microbubbles
AU - Lajoinie, Guillaume
AU - Luan, Ying
AU - Gelderblom, Erik
AU - Dollet, Benjamin
AU - Mastik, Frits
AU - Dewitte, Heleen
AU - Lentacker, Ine
AU - de Jong, Nico
AU - Versluis, Michel
PY - 2018/5/31
Y1 - 2018/5/31
N2 - Ultrasound-driven microbubbles are attractive for a variety of applications in medicine, including real-time organ perfusion imaging and targeted molecular imaging. In ultrasound-mediated drug delivery, bubbles decorated with a functional payload become convenient transport vehicles and offer highly localized release. How to efficiently release and transport these nanomedicines to the target site remains unclear owing to the microscopic length scales and nanoseconds timescales of the process. Here, we show theoretically how non-spherical bubble oscillations lead first to local oversaturation, thereby inducing payload release, and then to microstreaming generation that initiates transport. Experimental validation is achieved through ultra-high-speed imaging in an unconventional side-view at tens of nanoseconds timescales combined with high-speed fluorescence imaging to track the release of the payload. Transport distance and intrinsic bubble behavior are quantified and agree well with the model. These results will allow for optimizing the therapeutic use of targeted microbubbles for precision medicine.
AB - Ultrasound-driven microbubbles are attractive for a variety of applications in medicine, including real-time organ perfusion imaging and targeted molecular imaging. In ultrasound-mediated drug delivery, bubbles decorated with a functional payload become convenient transport vehicles and offer highly localized release. How to efficiently release and transport these nanomedicines to the target site remains unclear owing to the microscopic length scales and nanoseconds timescales of the process. Here, we show theoretically how non-spherical bubble oscillations lead first to local oversaturation, thereby inducing payload release, and then to microstreaming generation that initiates transport. Experimental validation is achieved through ultra-high-speed imaging in an unconventional side-view at tens of nanoseconds timescales combined with high-speed fluorescence imaging to track the release of the payload. Transport distance and intrinsic bubble behavior are quantified and agree well with the model. These results will allow for optimizing the therapeutic use of targeted microbubbles for precision medicine.
U2 - 10.1038/s42005-018-0020-9
DO - 10.1038/s42005-018-0020-9
M3 - Article
SN - 2399-3650
VL - 1
JO - Communications Physics
JF - Communications Physics
M1 - 22
ER -