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Current Bioactive Compounds

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ISSN (Print): 1573-4072
ISSN (Online): 1875-6646

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Research Article

Synthesis of New Bi-Triazoles with Plasmocide Action Against Plasmodium falciparum

Author(s): Dinesh Addla, Cristiane Diniz, Quelli Larissa Oliveira de Santana, Leandro do Nascimento Martinez, Marcinete Latorre Almeida, Minelly Azevedo da Silva, Welington da Silva Paula do Nascimento, Aurileya de Jesus Gouveia, Saara Neri Fialho, Amália dos Santos Ferreira, Ana Paula de Azevedo dos Santos, Carlos Roland Kaiser, Carolina Bioni Garcia Teles and Sabrina Baptista Ferreira*

Volume 19, Issue 6, 2023

Published on: 18 January, 2023

Article ID: e171122210995 Pages: 11

DOI: 10.2174/1573407219666221117113556

Price: $65

Abstract

Background: A series of bi-triazoles conjugates 1,2,3 and 1,2,4 was synthesized with an aim to study the evaluation of the antimalarial profile of families of triazole derivatives. The study used the W2 strain of Plasmodium falciparum (Chloroquine-Resistant), to determine the inhibitory concentration of 50% of the parasites (IC50) and HepG2 cells to describe the cytotoxic concentration for 50% of the cells (CC50). Among the study classes, bi-triazoles stood out with IC50 values between 8.9 to 0.45 μM; highlighted the compound 14d (IC50 of 0.45 ± 0.02 μM) with the most promising result. Regarding the cytotoxic concentration, all compounds that presented IC50 values ≤ 100 μM were evaluated. Three compounds stood out as the highest selectivity index (SI) values, 14b (SI ˃111.1), 13d (SI ˃111.1) and 14d (SI ˃1.111). Such results expose the importance of working with classes of molecules that allow rapid synthesis and dispositions for structural changes. Highlighting the evolution of the IC50 values of the compounds, when adding the second triazole block. Thus, the results found in this study, have the possibility of choosing new molecules for the treatment of malaria.

Objective: This work was to synthesize a series of bi-triazole conjugates 1,2,3 and 1,2,4-triazole moiety and evaluate their activities against Plasmodium falciparum.

Methods: The bi-triazole was synthesized in a 3-step route in moderated yields, and their structures were confirmed by NMR spectral data analyses. For the in vitro antiplasmodial assays, the SYBR Green fluorimetric technique and the W2 strain were used, where an IC50 (Inhibitory Concentration) value was obtained for each compound. The compounds were also evaluated for their stagespecificity and speed of action (W2 strain). Safety tests were performed to determine the hemolytic and cytotoxic action of the evaluated compounds. In these tests, the cell lines HepG2 and VERO were used, and the cytotoxicity was evaluated by the MTT technique. This allowed the CC50 values to be obtained (Cytotoxic Concentration). Subsequently, the Selectivity Index (SI) was calculated for each compound.

Results: The newly synthesized bi-triazole compounds could serve as potent leads for the development of novel antimalarial compounds. In general, the bi-triazoles with trifluoromethyl group present at 1,2,4-triazole moiety proved to be more potent regarding antiplasmodial activity.

Conclusion: The synthesized bi-triazole compounds could serve as potent leads for the development of novel antimalarial agents.

Keywords: Plasmodium falciparum, bi-triazole, antimalarial, synthesis, 1, 2, 4-triazole, 3-triazole, green fluorimetric technique.

Graphical Abstract

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