Improving retention time of Indocyanine Green for in vivo two-photon microscopy using liposomal encapsulation
Tomar, A.; Stern, N.; Porter, T.; Dunn, A. K.
Show abstract
We propose a technique for improving the retention time of Indocyanine Green (ICG), an FDA-approved, widely available, near infrared (NIR) probe for in vivo imaging of the cerebrovascular structure in rodents. We present a synthesis process for liposomal nanoparticles that, when used to encapsulate ICG, significantly increase the circulation time of the vascular label. Further, we conduct in vivo imaging experiments with unencapsuated (free) ICG and liposomal ICG (L-ICG) and compare the retention of ICG in the vascular network. Our work tackles one of the most fundamental limitations in using ICG i.e. rapid clearance, for the purpose of two-photon microscopy.
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