Antiparasitic Activities of Acyl Hydrazones from Cinnamaldehydes and Structurally Related Fragrances

<b>Background:</b> New drugs for the treatment of protozoal parasite infections such as toxoplasmosis and leishmaniasis are required. Cinnamaldehyde and its derivatives appear to be promising antiparasitic drug candidates. <b>Methods:</b> Acyl hydrazones of cinnamaldehyde, 4-...

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Main Authors: Ibrahim S. Al Nasr, Waleed S. Koko, Tariq A. Khan, Rainer Schobert, Bernhard Biersack
Format: Article
Language:English
Published: MDPI AG 2024-11-01
Series:Antibiotics
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Online Access:https://www.mdpi.com/2079-6382/13/12/1114
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Summary:<b>Background:</b> New drugs for the treatment of protozoal parasite infections such as toxoplasmosis and leishmaniasis are required. Cinnamaldehyde and its derivatives appear to be promising antiparasitic drug candidates. <b>Methods:</b> Acyl hydrazones of cinnamaldehyde, 4-dimethylaminocinnamaldehyde, and of the synthetic fragrances silvial<sup>TM</sup> and florhydral<sup>TM</sup> were prepared and tested for activity against <i>Toxoplasma gondii</i> (<i>T. gondii</i>) and <i>Leishmania major</i> (<i>L. major</i>) parasites. <b>Results:</b> Three cinnamaldehyde acyl hydrazones (3-hydroxy-2-naphthoyl <b>2a</b> and the salicyloyls <b>2c</b> and <b>2d</b>) showed good activity against <i>T. gondii</i>, and two compounds derived from cinnamaldehyde and florhydral<sup>TM</sup> (3-hydroxy-2-naphthoyls <b>2a</b> and <b>4a</b>) exhibited moderate activity against <i>L. major</i> promastigotes. <b>Conclusions:</b> In particular, the identified antitoxoplasmal activities are promising and might lead to the development of new potent and cost-effective drug candidates for the therapy of toxoplasmosis.
ISSN:2079-6382