title: Synthesis and anti-HIV activity of bi-functional betulinic acid derivatives.
abstract: Betulinic acid (BA) derivatives with a side chain at C-3 can inhibit HIV-1 maturation. On the other hand, BA derivatives with a side chain at C-28 can block HIV-1 entry. In order to combine the anti-maturation and anti-entry activities in a single molecule, new bi-functional BA derivatives containing side chains at C-3 and C-28 have been synthesized. The most potent compound ([[N-[3beta-O-(3',3'-dimethylsuccinyl)-lup-20(29)-en-28-oyl]-7-aminoheptyl]-carbamoyl]methane) inhibited HIV-1 at an EC50 of 0.0026 microM and was at least 20 times more potent than either the anti-maturation lead compound DSB or the anti-entry lead compound IC9564. This bi-functional BA derivative was active against both HIV entry and maturation. These results suggest that bi-functional BA derivatives with dual mechanisms of action have the potential to become clinically useful for AIDS therapy.
authors.affiliation: Department of Surgery, Duke University Medical Center, Durham, NC 27710, USA.
authors.forename: Li
authors.initials: L
authors.lastname: Huang
authors.forename: Phong
authors.initials: P
authors.lastname: Ho
authors.forename: Kuo-Hsiung
authors.initials: KH
authors.lastname: Lee
authors.forename: Chin-Ho
authors.initials: CH
authors.lastname: Chen
mesh_terms: D000818:Animals; D019380:Anti-HIV Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D019556:COS Cells; D002459:Cell Fusion; D002522:Chlorocebus aethiops; D015497:HIV-1 / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D008968:Molecular Conformation; D053978:Pentacyclic Triterpenes; D014315:Triterpenes / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D000094062:Betulinic Acid
chemical_list: D019380:Anti-HIV Agents; D053978:Pentacyclic Triterpenes; D014315:Triterpenes; D000094062:Betulinic Acid