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Quadros Gomes AR, da Rocha Galucio NC, de Albuquerque KCO, Brígido HPC, Varela ELP, Castro ALG, Vale VV, Bahia MO, Rodriguez Burbano RM, de Molfeta FA, Carneiro LA, Percario S, Dolabela MF. Toxicity evaluation of Eleutherine plicata Herb. extracts and possible cell death mechanism. Toxicol Rep 2021; 8:1480-1487. [PMID: 34401358 PMCID: PMC8353407 DOI: 10.1016/j.toxrep.2021.07.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 07/05/2021] [Accepted: 07/30/2021] [Indexed: 01/07/2023] Open
Abstract
Ethanol extract of Eleutherine plicata showed low in vitro and in vivo cytotoxic potential. The dichloromethane fraction was cytotoxic to HepG2 and caused DNA. However, no toxicity was observed in vivo. Isoeleutherin caused DNA damage by the comet method and activated caspase-8 in the in silico study.
Eleutherine plicata has been shown to be a promising medicinal plant, and its activity has been associated with naphthoquinones. The present study aimed at evaluating the cytotoxicity, genotoxicity, and oral toxicity of the ethanol extract (EEEp), dichloromethane fraction (FDMEp) of E. plicata, and isoeleutherin. For the cytotoxicity evaluation, the viability test (MTT) was used. Genotoxicity was accessed through the Comet assay (alkaline version), acute and subacute oral toxicities were also evaluated. The antioxidant capacity of the samples in the wells where the cells were treated with E. plicata was evaluated. Furthermore, the participation of caspase-8 in the possible mechanism of action of isoeleutherin, eleutherin, and eleutherol was also investigated through a docking study. FDMEp and isoeleutherin were cytotoxic, with higher rates of DNA fragmentation observed for FDMEp and isoeleutherin, and all samples displayed higher antioxidant potential than the control. In the acute oral toxicity test, EEEp, FDMEp, and isoeleutherin did not cause significant clinical changes. In the subacute toxicity assay, EEEp and FDMEp also did not cause clinical, hematological, or biochemical changes. The three compounds bound similarly to caspase-8. Despite the results of cytotoxicity, in vitro studies demonstrated that the use of EEEp appears to be safe and cell death may involve its binding to caspase-8.
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Key Words
- ALT, alanine aminotransferase
- AST, aspartate aminotransferase
- BCRJ, Cell bank of Rio de Janeiro
- BFS, bovine fetal serum
- Caspase-8
- DARP, dopamine releasing protein
- DMEM, Dulbecco's Modified Eagle's Medium
- DMSO, dimethyl sulfoxide
- DPPH, 2,2-diphenyl-1-picrylhydrazyl
- EDTA, ethylenediaminetetraacetic
- EEEp, ethanol extract of Eleutherine plicata
- Eleutherin
- Eleutherine plicata
- Eleutherol
- FADD, Fas associated death domain
- FDMEp, dichloromethane fraction of Eleutherine plicata
- FrAE, ethyl acetate fraction of Elutherine plicata
- GA, Genetic Algorithm
- GOLD, Genetic Optimization for Ligand Docking
- HPLC, high performance liquid chromatography
- IC50, 50 % cytotoxic concentration
- Isoeleutherin
- MD, molecular dynamics
- MTT, ([3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide])
- NMR, nuclear magnetic resonance
- NMU, N-methyl-N-nitrosurea
- OECD, Organization for Economic Co-Operation and Development
- PDB, Protein Data Bank
- ROS, reactive oxygen species
- RPMI, Roswell Park Memorial Institute medium
- RSMD, root mean square deviation
- TLC, tin layer chromatography
- TNFR, tumour necrosis fator receptor
- Toxicity
- rpm, rotations per minute
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Affiliation(s)
- Antonio Rafael Quadros Gomes
- Postgraduate Program in Pharmaceutical Innovation, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | - Natasha Costa da Rocha Galucio
- Postgraduate Program in Genetics and Molecular Biology, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil.,Postgraduate Program in Pharmaceutical Sciences, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | | | - Heliton Patrick Cordovil Brígido
- Postgraduate Program in Pharmaceutical Innovation, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | - Everton Luiz Pompeu Varela
- Postgraduate Program in Biodiversity and Biotechnology, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil.,Oxidative Stress Research Laboratory, Institute of Biological Sciences, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | - Ana Laura Gadelha Castro
- Postgraduate Program in Genetics and Molecular Biology, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | - Valdicley Vieira Vale
- Postgraduate Program in Pharmaceutical Innovation, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | - Marcelo Oliveira Bahia
- Postgraduate Program in Neuroscience and Cell Biology, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | - Rommel Mario Rodriguez Burbano
- Postgraduate Program in Genetics and Molecular Biology, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil.,Postgraduate Program in Neuroscience and Cell Biology, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | - Fábio Alberto de Molfeta
- Postgraduate Program in Chemistry, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | | | - Sandro Percario
- Postgraduate Program in Biodiversity and Biotechnology, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil.,Oxidative Stress Research Laboratory, Institute of Biological Sciences, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
| | - Maria Fâni Dolabela
- Postgraduate Program in Pharmaceutical Innovation, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil.,Postgraduate Program in Pharmaceutical Sciences, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil.,Postgraduate Program in Biodiversity and Biotechnology, Federal University of Pará, Av. Augusto Corrêa, 1, Guamá, 66075-110, Belém, PA, Brazil
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