title: Arylfurans as potential trypanosoma cruzi trypanothione reductase inhibitors.
abstract: The natural lignans veraguensin and grandisin have been reported to be active against Trypanosoma cruzi bloodstream forms. Aiming at the total synthesis of these and related compounds, we prepared three 2-arylfurans and eight 2,5-diarylfurans. They were evaluated for their potential as T. cruzi trypanothione reductase (TR) inhibitors as well against the parasite's intracellular (amastigote) and bloodstream (trypomastigote) forms. Compound 12 was the most effective against TR with an IC50 of 48.5 microM while 7 and 14 were active against amastigotes, inhibiting the parasite development by 60% at 20 microg/ml (59 and 90 microM, respectively). On the other hand, none of the compounds was significantly active against the parasite bloodstream forms even at 250 microg/ml (0.6-1.5 mM).
authors.affiliation: Laboratório de Quimica de Produtos Naturais, Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima 1715, 30190-002 Belo Horizonte, MG, Brasil.
authors.forename: Renata B
authors.initials: RB
authors.lastname: de Oliveira
authors.forename: Aline B M
authors.initials: AB
authors.lastname: Vaz
authors.forename: Rosana O
authors.initials: RO
authors.lastname: Alves
authors.forename: Daniel B
authors.initials: DB
authors.lastname: Liarte
authors.forename: Claudio L
authors.initials: CL
authors.lastname: Donnici
authors.forename: Alvaro J
authors.initials: AJ
authors.lastname: Romanha
authors.forename: Carlos L
authors.initials: CL
authors.lastname: Zani
mesh_terms: D000818:Animals; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D005663:Furans / Q000737:chemistry / Q000494:pharmacology*; D020128:Inhibitory Concentration 50; D008297:Male; D051379:Mice; D009247:NADH, NADPH Oxidoreductases / Q000037:antagonists & inhibitors*; D013329:Structure-Activity Relationship; D014344:Trypanocidal Agents / Q000494:pharmacology*; D014349:Trypanosoma cruzi / Q000187:drug effects*
chemical_list: D004791:Enzyme Inhibitors; D005663:Furans; D014344:Trypanocidal Agents; D009247:NADH, NADPH Oxidoreductases; C049608:trypanothione reductase