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Macromol Biosci. 2019 Feb;19(2):e1800340. doi: 10.1002/mabi.201800340. Epub 2018 Dec 7.

Efficient Cholera Toxin B Subunit-Based Nanoparticles with MRI Capability for Drug Delivery to the Brain Following Intranasal Administration.

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State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers (Ministry of Education), Beijing Laboratory of Biomedical Materials, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Department of Neurology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100043, China.


Alzheimer's disease (AD) is an incurable neurodegenerative brain disorder that exhibits clear pathologic changes in the hippocampus. Traditional drug delivery systems are ineffective due to the existence of the blood-brain barrier (BBB). In this study, an efficient, stable, and easily constructed nanosystem (CB-Gd-Cy5.5) based on the cholera toxin B subunit (CB) is designed to improve the efficiency of drug delivery to the brain, especially the hippocampus. Through intranasal administration, CB-Gd-Cy5.5 is easily delivered to the brain without intervention by the BBB. The CB in CB-Gd-Cy5.5 is used for specifically combining with the monosialoganglioside GM1, which is widely found in the hippocampus. This nanosystem exhibits impressive performance in accumulating in the hippocampus. In addition, the good magnetic resonance imaging (MRI) capability of CB-Gd-Cy5.5 can satisfy the monitoring of AD in the different stages.


blood-brain barrier; brain drug delivery; cholera toxin B subunit; intranasal administration; magnetic resonance imaging


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