Lerisetron Analogues with Antimalarial Properties: Synthesis, Structure–Activity Relationship Studies, and Biological Assessment | Zendy

Rudolf Mueller | Zendy; Virsinha Reddy | Zendy; Aloysius T. Nchinda | Zendy; Fanuel M. Mebrahtu | Zendy; Dale Taylor | Zendy; Nina Lawrence | Zendy; Lloyd Tanner | Zendy; Marine A. Barnabé | Zendy; Charles J. Eyermann | Zendy; Bin Zou | Zendy; Ravinder Reddy Kondreddi | Zendy; Suresh B. Lakshminarayana | Zendy; Matthias Rottmann | Zendy; Leslie J. Street | Zendy; Kelly Chibale | Zendy

Open Access

Lerisetron Analogues with Antimalarial Properties: Synthesis, Structure–Activity Relationship Studies, and Biological Assessment

Author(s) -

Rudolf Mueller,

Virsinha Reddy,

Aloysius T. Nchinda,

Fanuel M. Mebrahtu,

Dale Taylor,

Nina Lawrence,

Lloyd Tanner,

Marine A. Barnabé,

Charles J. Eyermann,

Bin Zou,

Ravinder Reddy Kondreddi,

Suresh B. Lakshminarayana,

Matthias Rottmann,

Leslie J. Street,

Kelly Chibale

Publication year - 2020

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.0c00327

Subject(s) - herg , plasmodium falciparum , potency , pharmacology , artemisinin , in vivo , benzimidazole , ic50 , chemistry , plasmodium berghei , potassium channel , malaria , drug discovery , biology , stereochemistry , in vitro , biochemistry , immunology , microbiology and biotechnology , organic chemistry , biophysics

A phenotypic whole cell high-throughput screen against the asexual blood and liver stages of the malaria parasite identified a benzimidazole chemical series. Among the hits were the antiemetic benzimidazole drug Lerisetron (IC NF54 = 0.81 μM) and its methyl-substituted analogue (IC NF54 = 0.098 μM). A medicinal chemistry hit to lead effort led to the identification of chloro-substituted analogue with high potency against the drug-sensitive NF54 (IC NF54 = 0.062 μM) and multidrug-resistant K1 (IC K1 = 0.054 μM) strains of the human malaria parasite . Compounds and gratifyingly showed in vivo efficacy in both and mouse models of malaria. Cardiotoxicity risk as expressed in strong inhibition of the human ether-a-go-go-related gene (hERG) potassium channel was identified as a major liability to address. This led to the synthesis and biological assessment of around 60 analogues from which several compounds with improved antiplasmodial potency, relative to the lead compound , were identified.

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