alexa Photoacoustic tomography of a rat cerebral cortex in vivo with au nanocages as an optical contrast agent.
Medicine

Medicine

Drug Designing: Open Access

Author(s): Yang X, Skrabalak SE, Li ZY, Xia Y, Wang LV, Yang X, Skrabalak SE, Li ZY, Xia Y, Wang LV

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Abstract Poly(ethylene glycol)-coated Au nanocages have been evaluated as a potential near-infrared (NIR) contrast agent for photoacoustic tomography (PAT). Previously, Au nanoshells were found to be an effective NIR contrast agent for PAT; however, Au nanocages with their more compact sizes (<50 nm compared to >100 nm for Au nanoshells) and larger optical absorption cross sections should be better suited for in vivo applications. We sequentially injected Au nanocages into the circulatory system of a rat in three administrations and in vivo PAT was conducted immediately prior to the first injection and continued until 5 h after the final injection. A gradual enhancement of the optical absorption in the cerebral cortex, by up to 81\%, was observed over the course of the experiment. This article was published in Nano Lett and referenced in Drug Designing: Open Access

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