Journal of Glycomics & Lipidomics
Open Access

The role of apolipoprotein E in uptake of atovaquone into the brain in murine acute and reactivated toxoplasmosis

International Conference on Lipid Science & Technology

November 30 - December 02, 2015 San Francisco, USA

Hend M Shubar1, Ildiko R Dunay1, Sabrina Lachenmaier1, Margitta Dathe2, Faris Nadiem Bushrab3, Rachmat Mauludin3, Rainer H M�?¼ller3, Rudolf Fitzner1, Klaus Borner1 and Oliver Liesenfeld1

1University Medicine Berlin, Germany 2Leibniz Institute for Molecular Pharmacology, Germany 3Free University of Berlin, Germany

Posters-Accepted Abstracts: J Glycomics Lipidomics

Abstract :

We investigated whether coating of atovaquone nanosuspensions (ANSs) with apolipoprotein E (apoE) peptides improves the uptake of atovaquone into the brain. The passage across the blood-brain barrier (BBB) of ANSs stabilized by polysorbate 80 (Tweenv 80), poloxamer 184 (P184), or poloxamer 338 (P338) and the same formulations coated with apoE peptides were analyzed in vitro and in vivo. Passage through a rat coculture model of the BBB did not differ between individual atovaquone formulations, and the addition of apoE peptides did not enhance the transport. Following the induction of toxoplasmic encephalitis (TE) in mice, treatment with all atovaquone formulations reduced the number of parasites and inflammatory foci compared with untreated mice. Uptake of atovaquone into the brain did not depend on coating with apoE. Finally, incubation of apoE peptide��?coated ANSs with brain endothelial cells for 30 min did result in the accumulation of nanoparticles on the cell surface but not in their uptake into the cells. In conclusion, ANSs coated with Tweenv 80 or poloxamers showed therapeutic efficacy in murine toxoplasmosis. ApoE- and apoE-derived peptides do not induce the uptake of ANSs into the brain. Alternative mechanisms seem to be in operation, thereby mediating the passage of atovaquone across the BBB.

Biography :

Email: hshubar@hotmail.com