Abstract
This work was to report preparation and quality control of targeted microbubbles (MBt) via biotin–avidin bridge, specifically verification of the “biotin–avidin–biotin” sandwich structure. (1) Lipid microbubbles filled with sulphur hexafluoride were produced by sonication and compared with commercially available microbubbles. (2) MBt were produced via biotin–avidin bridge. Specifically, the “biotin–avidin–biotin” sandwich structure on the surface of MBt was verified in vitro using fluorescence. (3) Adhesion of alpha(v)beta(3)-integrin targeted MBt (MBαvβ3) to human umbilical vein endothelial cells (HUVECs) was tested using the parallel plate flow chamber (PPFC). “Biotin–avidin” is a reliable method to attach molecular probe onto the surface of microbubbles.
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