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Oral fondaparinux: use of lipid nanocapsules as nanocarriers and in vivo pharmacokinetic study

Authors Ramadan A, Lagarce F, Tessier-Marteau A, Thomas O, Legras Pierre, Macchi L, Saulnier P, Benoit J

Published 21 November 2011 Volume 2011:6 Pages 2941—2951


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Alyaa Ramadan1,4, Frederic Lagarce1,3, Anne Tessier-Marteau2, Olivier Thomas1, Pierre Legras5, Laurent Macchi2, Patrick Saulnier1, Jean Pierre Benoit1,3
1LUNAM Université, Ingénierie de la Vectorisation Particulaire, Inserm U-646, Angers, France; 2Hematology Department, Angers University Hospital, Angers, France; 3Department of Pharmacy, Angers University Hospital, Angers, France; 4Department of Pharmaceutics, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt; 5SCAHU, Animal House, Angers, France

Abstract: Oral anticoagulant therapy could be advanced using lipid-based nanoparticulate systems. This study examined lipid nanocapsules for their oral absorption potential as the first step in developing oral fondaparinux (Fp) novel carriers. Using phase inversion method and cationic surfactants such as hexadecyltrimethyl ammonium bromide (CTAB) or stearylamine (SA), cationic lipid nanocapsules (cLNCs), loaded with Fp on their surface, were prepared and characterized (zeta potential, size and Fp association efficiency and content). In vivo studies were conducted after single oral increasing doses of Fp-loaded cLNCs (0.5 to 5 mg/kg of Fp) in rats and the concentration of Fp in the plasma was measured by anti-factor Xa activity assay. The monodisperse, (~50 nm), positively charged Fp-cLNCs with high drug loadings demonstrated linear pharmacokinetic profiles of the drug with an increased oral absolute bioavailability (up to ~21%) compatible with therapeutic anticoagulant effect (>0.2 µg/mL).

Keywords: oral anticoagulant, fondaparinux, lipid nanocapsules, bioavailability, pharmacokinetics, rats

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