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Current Computer-Aided Drug Design


ISSN (Print): 1573-4099
ISSN (Online): 1875-6697

Research Article

Multiple-targets Directed Screening of Flavonoid Compounds from Citrus Species to find out Antimalarial Lead with Predicted Mode of Action: An In Silico and Whole Cell-based In vitro Approach

Author(s): Neelutpal Gogoi*, Dipak Chetia, Bhaskarjyoti Gogoi and Aparoop Das

Volume 17, Issue 1, 2021

Published on: 26 December, 2019

Page: [69 - 82] Pages: 14

DOI: 10.2174/1573409916666191226103000

Price: $65


Background: Development of resistance by the malaria parasite Plasmodium falciparum has created challenges in the eradication of this deadly infectious disease. Hence newer strategies are adopted to combat this disease and simultaneously, new lead/hit identification is going on worldwide to develop new chemotherapeutic agents against malaria.

Objective: In this study, 44 flavonoids found mainly in the fruit juice of Citrus species having traditional use in malaria-associated fever were selected for in silico multiple-target directed screening against three vital targets of the parasite namely dihydroorotate dehydrogenase (PfDHODH), dihydrofolate reductase thymidine synthase (PfDHFR-TS) and plasma membrane P-type cation translocating ATPase (PfATP4) to find out new lead molecule(s).

Methods: The in silico screening was carried out using different protocols of the Biovia Discovery Studio 2018 software and Network analyzer plugin of Cytoscape 3.6.0 followed by in vitro screening of the best lead.

Results: After screening, CF8 or luteolin was found to have good binding affinity against PfDHODH and PfATP4 with –CDocker energy 42.2719 and 33.1447 with respect to their cocrystal ligands. These findings were also supported by structure-based pharmacophore, DFT (Density Functional Theory) study and finally by in vitro screening of the lead with IC50 values of 8.23 μm and 12.41 μm against 3D7 (chloroquine-sensitive) and RKL-9 (chloroquine-resistant) strain of P. falciparum, respectively.

Conclusion: Our study found a moderately active lead molecule with the predicted mode of action which can be utilized to design some new derivatives with more safety and efficacy by targeting the two enzymes.

Keywords: Malaria, Plasmodium falciparum, Citrus species, in silico study, multiple-targets screening, antimalarial lead.

Graphical Abstract
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