Aryl aryl methyl thio arenes prevent multidrug-resistant malaria in mouse by promoting oxidative stress in parasites

Free Radical Biology & Medicine
Manish GoyalUday Bandyopadhyay

Abstract

We have synthesized a new series of aryl aryl methyl thio arenes (AAMTAs) and evaluated antimalarial activity in vitro and in vivo against drug-resistant malaria. These compounds interact with free heme, inhibit hemozoin formation, and prevent Plasmodium falciparum growth in vitro in a concentration-dependent manner. These compounds concentration dependently promote oxidative stress in Plasmodium falciparum as evident from the generation of intraparasitic oxidants, protein carbonyls, and lipid peroxidation products. Furthermore, AAMTAs deplete intraparasite GSH levels, which is essential for antioxidant defense and survival during intraerythrocytic stages. These compounds displayed potent antimalarial activity not only in vitro but also in vivo against multidrug-resistant Plasmodium yoelii dose dependently in a mouse model. The mixtures of enantiomers of AAMTAs containing 3-pyridyl rings were found to be more efficient in providing antimalarial activity. Efforts have been made to synthesize achiral AAMTAs 17-23 and among them, compound 18 showed significant antimalarial activity in vivo.

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Citations

Feb 17, 2015·Advanced Synthesis & Catalysis·Gustavo FrenschPatrick J Walsh
May 4, 2016·Antimicrobial Agents and Chemotherapy·Souvik SarkarUday Bandyopadhyay
Aug 23, 2020·Malaria Journal·Dao Ngoc Hien TamNguyen Tien Huy
Sep 24, 2021·The Journal of Organic Chemistry·Valter E MurieGiuliano C Clososki

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