Evaluation of azasterols as anti-parasitics

Ludovic Gros, Silvia Orenes Lorente, Carmen Jimenez Jimenez, Vanessa Yardley, Lauren Rattray, Hayley Wharton, Susan Little, Simon L. Croft, Luis M. Ruiz-Perez, Dolores Gonzalez-Pacanowska, Ian H. Gilbert

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    65 Citations (Scopus)


    NOTE: THE SPECIAL CHARACTERS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE PUBLISHER'S WEBSITE FOR ACCURATE DISPLAY. In this article, the design and synthesis of some novel azasterols is described, followed by their evaluation against Trypanosoma brucei rhodesiense, T. cruzi, Leishmania donovani, and Plasmodium falciparum, the causative agents of human African trypanosomiasis, Chagas disease, leishmaniasis, and malaria, respectively. Some of the compounds showed anti-parasitic activity. In particular, a number of compounds appeared to very potently inhibit the growth of the blood stream form T. b. rhodesiense, with one compound giving an IC50 value of 12 nM. Clear structure activity relationships could be discerned. These compounds represent important leads for further optimization. Azasterols have previously been shown to inhibit sterol biosynthesis in T. cruzi and L. donovani by the inhibition of the enzyme sterol 24-methyltransferase. However, in this case, none of the compounds showed inhibition of the enzyme. Therefore, these compounds have an unknown mode of action.
    Original languageEnglish
    Pages (from-to)6094-6103
    Number of pages10
    JournalJournal of Medicinal Chemistry
    Issue number20
    Publication statusPublished - Oct 2006


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