Aminothiol multidentate chelators against Chagas disease

Area of Science:

• Medicinal Chemistry
• Parasitology
• Drug Discovery

Background:

• Trypanosoma cruzi causes Chagas disease, a significant public health concern.
• Current treatments for Chagas disease are limited and can have severe side effects.
• Iron chelators are being explored for their potential antiparasitic activities.

Purpose of the Study:

• To evaluate the efficacy of three aminothiol iron chelators against different forms of Trypanosoma cruzi.
• To assess the potential of these compounds for clearing trypomastigotes from donated blood.
• To investigate the in vivo anti-trypanosomal activity of these compounds.

Main Methods:

• Synthesis and characterization of BAT-TE, BAT-TM, and TAT compounds.
• In vitro testing against trypomastigote and epimastigote forms of T. cruzi.
• Assessment of trypanocidal activity in stored blood and in infected mouse models.

Main Results:

• BAT-TE demonstrated significant trypanocidal activity against trypomastigotes in stored blood (IC50 67.7±7 μM).
• BAT-TM and TAT also showed activity against trypomastigotes in vitro, but at higher concentrations.
• None of the tested compounds exhibited significant anti-trypanosomal activity in vivo in infected mice.
• TAT was effective against epimastigote forms (IC50 52±7 μM), while BAT derivatives were less effective.

Conclusions:

• BAT derivatives show promise for clearing trypomastigotes from donated blood due to their activity in stored blood.
• Further research is needed to optimize these compounds for in vivo efficacy against T. cruzi infections.
• The differential activity against various parasite forms suggests specific mechanisms of action that warrant further investigation.