國家衛生研究院 NHRI:Item 3990099045/1282

NHRI > Institute of Biomedical Engineering and Nanomedicine > Chung-Shi Yang > Periodical Articles > Item 3990099045/1282

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/1282

Title:	Nanoparticle-based in vivo investigation on blood-brain barrier permeability following ischemia and reperfusion
Authors:	Yang, CS;Chang, CH;Tsai, PJ;Chen, WY;Tseng, FG;Lo, LW
Contributors:	Center for Nanomedicine Research;Division of Medical Engineering Research
Abstract:	The blood-brain barrier (BBB) represents a significant impediment to a large variety of central nervous system-active agents. In the current study, we applied fluorescent polystyrene nanospheres (20 nm) to study the BBB permeability following cerebral ischemia and reperfusion. A microdialysis probe was implanted in the cerebral cortex of an anesthetized rat injected with fluorescent polystyrene nanospheres. The circulating nanospheres extravasating to the brain extracellular fluids were collected by the probe. Fluorescence intensity in the microdialysates throughout the course of cerebral ischemia/reperfusion was measured. Cerebral ischemia and reperfusion induced transient accumulations of extracellular nanospheres in the brain. The accumulation of nanospheres may result from their extravasation from the blood vessels. The concurrent cerebral oxygen levels monitored using oxygen-dependent quenching of phosphorescence decreased following ischemia and returned to their original levels after reperfusion. In conclusion, we demonstrated that high temporal resolution measurements of BBB permeability in vivo can be obtained using fluorescence polystyrene nanospheres and that these data correlate with changes of cerebral oxygen concentration. This present investigation indicates that nanoparticles have potential clinical applications involving drug delivery and determination of therapeutic efficacy and on-site diagnosis.
Keywords:	Chemistry, Analytical
Date:	2004-08-01
Relation:	Analytical Chemistry. 2004 Aug;76(15):4465-4471.
Link to:	http://dx.doi.org/10.1021/ac035491v
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0003-2700&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000223010100045
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=3542995683
Appears in Collections:	[Chung-Shi Yang] Periodical Articles [Leu-Wei Lo] Periodical Articles

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