In Vivo and in Vitro Assessment of Baseline Blood-Brain Barrier Parameters in the Presence of Novel Nanoparticles

Pharmaceutical Research - Tập 20 Số 5 - Trang 705-713 - 2003
Lockman, Paul R.1, Koziara, Joanna2, Roder, Karen E.1, Paulson, Jennifer1, Abbruscato, Thomas J.1, Mumper, Russell J.2, Allen, David D.1
1Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University HSC, Amarillo
2Division of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington

Tóm tắt

Purpose. Nanoparticles have advantage as CNS drug delivery vehicles given they disguise drug permeation limiting characteristics. Conflicting toxicological data, however, is published with regard to blood-brain barrier integrity and gross mortality. Methods. To address this issue two novel nanoparticle types: “emulsifying wax/Brij 78”and Brij 72/Tween 80 nanoparticles were evaluated in vivo for effect on cerebral perfusion flow, barrier integrity, and permeability using the in situ brain perfusion technique. Additional evaluation was completed in vitro using bovine brain microvessel endothelial cells for effect on integrity, permeability, cationic transport interactions, and tight junction protein expression. Results. In the presence of either nanoparticle formulation, no overall significant differences were observed for cerebral perfusion flow in vivo. Furthermore, observed in vitro and in vivo data showed no statistical changes in barrier integrity, membrane permeability, or facilitated choline transport. Western blot analyses of occludin and claudin-1 confirmed no protein expression changes with incubation of either nanoparticle. Conclusions. The nanoparticle formulations appear to have no effect on primary BBB parameters in established in vitro and in vivo blood-brain barrier models.

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Pharmaceutical Research

Tập 20 Số 5

705-713

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