The efficacy of 2-nitrovinylfuran derivatives against Leishmania in vitro and in vivo

Mem Inst Oswaldo Cruz. 2015 Apr;110(2):166-73. doi: 10.1590/0074-02760140324. Epub 2015 Mar 24.

Abstract

Despite recent advances in the treatment of some forms of leishmaniasis, the available drugs are still far from ideal due to inefficacy, parasite resistance, toxicity and cost. The wide-spectrum antimicrobial activity of 2-nitrovinylfuran compounds has been described, as has their activity against Trichomonas vaginalis and other protozoa. Thus, the aim of this study was to test the antileishmanial activities of six 2-nitrovinylfurans in vitro and in a murine model of leishmaniasis. Minimum parasiticide concentration (MPC) and 50% inhibitory concentration (IC50) values for these compounds against the promastigotes of Leishmania amazonensis, Leishmania infantum and Leishmania braziliensis were determined, as were the efficacies of two selected compounds in an experimental model of cutaneous leishmaniasis (CL) caused by L. amazonensis in BALB/c mice. All of the compounds were active against the promastigotes of the three Leishmania species tested. IC50 and MPC values were in the ranges of 0.8-4.7 µM and 1.7-32 µM, respectively. The compounds 2-bromo-5-(2-bromo-2-nitrovinyl)-furan (furvina) and 2-bromo-5-(2-methyl-2-nitrovinyl)-furan (UC245) also reduced lesion growth in vivo at a magnitude comparable to or higher than that achieved by amphotericin B treatment. The results demonstrate the potential of this class of compounds as antileishmanial agents and support the clinical testing of Dermofural(r) (a furvina-containing antifungal ointment) for the treatment of CL.

MeSH terms

  • Amphotericin B / administration & dosage
  • Animals
  • Antiprotozoal Agents / administration & dosage*
  • Cell Proliferation / drug effects*
  • Clinical Trials as Topic
  • Disease Models, Animal
  • Female
  • Furans / administration & dosage*
  • Humans
  • In Vitro Techniques
  • Inhibitory Concentration 50
  • KB Cells / drug effects
  • Leishmania / classification
  • Leishmania / drug effects*
  • Leishmania / growth & development
  • Leishmaniasis, Cutaneous / drug therapy*
  • Mice, Inbred BALB C
  • Neglected Diseases / drug therapy
  • Time Factors
  • Vinyl Compounds / administration & dosage

Substances

  • 2-bromo-5-(2-bromo-2-nitrovinyl)furan
  • Antiprotozoal Agents
  • Furans
  • UC245
  • Vinyl Compounds
  • 2-vinylfuran
  • Amphotericin B