Dual‐modality imaging for identifying thrombosis via platelet GPⅡb/Ⅲa receptor targeted cyclic RGDfK microbubbles
Graphical Abstract
Abstract
Acute thrombotic events play a major role in various cardiovascular diseases. Therefore, direct thrombus imaging can be proved beneficial for early diagnosis and prompt therapy of thrombosis. Our study investigated targeted dual‐modality cyclic arginine‐glycine‐aspartic micro bubbles (cRGD‐MBs) for direct imaging of thrombi by fluorescence and ultrasound.
cRGD‐MBs were prepared by mechanical vibration and chemical chelation methods.
Coulter counter analysis demonstrated that the cRGD‐MBs were well dispersed, with diameters ranging from 1 to 3 μm. They emitted bright red fluorescence under an excitation wavelength of 660 nm. In vivo fluorescence and ultrasound imaging revealed that cRGD‐MBs accumulated at the site of thrombus in the carotid artery with significant fluorescence and ultrasonic signal.
This study showed that novel microbubble cRGD‐MBs were successfully synthesized, and that these could potentially be used as contrast agents for immediate diagnosis of acute thrombus in vivo.
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