Abstract
MicroRNA (miRNA) is expected to play an important role in the diagnosis and therapy of various diseases. In miRNA therapy, the development of delivery tools to the target site is considered to be essential. By using a delivery tool possessing imaging ability, miRNA colocalized with the carrier could be visualized after administration. We prepared polyethylene glycol (PEG)-modified liposomes containing echo-contrast gas, "Bubble liposomes" (BLs), and confirmed that BLs containing cationic lipid were capable of loading miRNA. Furthermore, we also achieved the imaging and delivery of systemically injected miRNA to target site in combination with ultrasound exposure. MiRNA-loaded BLs could be a useful tool for imaging and therapy.
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