title: Synthesis of the dioleoyl derivative of iododeoxyuridine and its incorporation into reconstituted high density lipoprotein particles.
abstract: We investigated the potential use of reconstituted HDL particles (NeoHDL) as a carrier for lipophilic (pro)drugs. The antiviral drug iododeoxyuridine (IDU) was used as model compound. [3H]-IDU was derivatized with two oleoyl residues to dioleoyl[3H]iododeoxyuridine ([3H]IDU-Ol2), and the lipophilic prodrug was incorporated into NeoHDL by cosonication of [3H]IDU-Ol2 with lipids and HDL apoproteins. NeoHDL particles with the same density, size, and electrophoretic mobility as native HDL were obtained, which contained 7.3 +/- 0.8% (w/w) [3H]IDU-Ol2 (about 30 molecules of prodrug per particle). NeoHDL-associated [3H]IDU-Ol2 was stable during 2 h of incubation with human plasma; the prodrug was not appreciably hydrolyzed, nor exchanged with LDL. After intravenous injection of [3H]-IDU-Ol2-loaded 125I-NeoHDL into rats, [3H]IDU-Ol2 disappeared more rapidly from the circulation than the 125I-apoproteins (78.0 +/- 8.0% vs 30.1 +/- 4.5% of the dose cleared from plasma in 60 min, respectively). The hepatic association of the prodrug was higher than that of the apoproteins (21.6 +/- 0.5 vs 5.2 +/- 1.0% of the dose at 10 min after injection, respectively). As selective clearance and uptake of lipid esters is also observed with native HDL, this suggests that, in vivo, prodrug-loaded NeoHDL may be subject to physiological HDL-specific processing. Lactosylated [3H]IDU-Ol2-loaded 125I-NeoHDL, which contains galactose residues that can be recognized by galactose receptors on parenchymal liver cells, was rapidly cleared from plasma.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Division of Biopharmaceutics, University of Leiden, The Netherlands.
authors.forename: M K
authors.initials: MK
authors.lastname: Bijsterbosch
authors.forename: D
authors.initials: D
authors.lastname: Schouten
authors.forename: T J
authors.initials: TJ
authors.lastname: van Berkel
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000008:administration & dosage / Q000138:chemical synthesis* / Q000493:pharmacokinetics; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004337:Drug Carriers; D006801:Humans; D007065:Idoxuridine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry* / Q000493:pharmacokinetics; D007275:Injections, Intravenous; D007785:Lactose / Q000378:metabolism; D008075:Lipoproteins, HDL / Q000008:administration & dosage*; D008099:Liver / Q000378:metabolism; D011355:Prodrugs / Q000138:chemical synthesis*; D051381:Rats; D014316:Tritium
chemical_list: D000998:Antiviral Agents; D004337:Drug Carriers; D008075:Lipoproteins, HDL; D011355:Prodrugs; C090626:dioleoyl iododeoxyuridine; D014316:Tritium; D007785:Lactose; D007065:Idoxuridine