Integrated platform for brain imaging and drug delivery across the blood-brain barrier.

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Journal titleMethods in molecular biology (Clifton, N.J.)
Pages465481; # of pages: 17
Subjectantineoplastic agent; contrast medium; diagnostic agent; doxorubicin; liposome; nanoparticle; animal; article; blood brain barrier; brain mapping; brain tumor; chemistry; drug delivery system; drug effect; metabolism; mouse; synthesis; vascularization; Animals; Antineoplastic Agents; Blood-Brain Barrier; Brain Mapping; Brain Neoplasms; Contrast Media; Doxorubicin; Drug Delivery Systems; Liposomes; Mice; Nanoparticles
AbstractThe development of imaging and therapeutic agents against neuronal targets is hampered by the limited access of probes into the central nervous system across the blood-brain barrier (BBB). The evaluation of drug penetration into the brain in experimental models often requires complex procedures, including drug radiolabeling, as well as determinations in multiple animals for each condition or time point. Prospective in vivo imaging of drug biodistribution may provide an alternative to "classical" pharmacokinetics and biodistribution studies in that a contrast-enhanced imaging signal could serve as a surrogate for the amount of drug or biologic delivered to the organ of interest. For the brain-targeting applications, it is necessary to develop formulation strategies that enable a simultaneous drug and contrast agent delivery across the BBB. In this chapter, we describe methods for encapsulating drugs into liposome nanocarriers with surface display of both the imaging contrast agent for one or multiple imaging modalities and the single-domain antibody that undergoes receptor-mediated transcytosis across the BBB. Contrast-enhanced imaging signal detected in the brain after intravenous injection of such formulation(s) is proportional to the amount of drug delivered into the brain parenchyma. This method allows for a prospective, noninvasive estimation of drug delivery, accumulation, and elimination from the brain.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Biological Sciences (IBS-ISB)
Peer reviewedYes
NPARC number21271096
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Record identifier2cf3a7ef-121d-42e0-b8fb-09ee3c8eb7e8
Record created2014-03-24
Record modified2016-05-09
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