James R Ewing
Tanzania
Research Article
Targeting Glioma with a Dual Mode Optical and Paramagnetic Nanoprobe
across the Blood-brain Tumor Barrier
Author(s): Kishor Karki, James R Ewing and Meser M AliKishor Karki, James R Ewing and Meser M Ali
In brain tumors, delivering nanoparticles across the blood-tumor barrier presents major hurdles. A clinically relevant MRI contrast agent, GdDOTA and a near-infrared (NIR) fluorescent dye, DL680 were conjugated to a G5 PAMAM dendrimer, thus producing a dual-mode MRI and NIR imaging agent. Systemic delivery of the subsequent nano-sized agent demonstrated glioma-specific accumulation, probably due to the enhanced permeability and retention effect. In vivo MRI detected the agent in glioma tissue, but not in normal contralateral tissue; this observation was validated with in vivo and ex vivo fluorescence imaging. A biodistribution study showed the agent to have accumulated in the glioma tumor and the liver, the latter being the excretion path for a G5 dendrimer-based agent. .. View More»
DOI:
10.4172/2157-7439.1000395