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Vieira SAPB, Dos Santos BM, Santos Júnior CD, de Paula VF, Gomes MSR, Ferreira GM, Gonçalves RL, Hirata MH, da Silva RA, Brandeburgo MIH, Mendes MM. Isohemigossypolone: Antiophidic properties of a naphthoquinone isolated from Pachira aquatica Aubl. Comp Biochem Physiol C Toxicol Pharmacol 2021; 245:109028. [PMID: 33676005 DOI: 10.1016/j.cbpc.2021.109028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 02/16/2021] [Accepted: 02/23/2021] [Indexed: 01/17/2023]
Abstract
We investigated the antiophidic properties of isohemigossypolone (ISO), a naphthoquinone isolated from the outer bark of the Pachira aquatic Aubl. The inhibition of phospholipase A2, coagulant, fibrinogenolytic, hemorrhagic and myotoxic activities induced by Bothrops pauloensis venom (Pb) was investigated. For this, we use samples resulting from the incubation of Pb with ISO in different concentrations (1:1, 1:5 and 1:10 w/w), we also evaluated the condition of treatment using ISO after 15 min of venom inoculation. The activities of phospholipase A2, coagulant, fibrinogenolytic, hemorrhagic and myotoxic induced by the B. pauloensis venom were significantly inhibited when the ISO was pre-incubated with the crude venom. For in vivo neutralization tests, the results were observed even when the ISO was applied after 15 min of inoculation of the venom or metalloprotease (BthMP). Also, to identify the inhibition mechanism, we performed in silico assays, across simulations of molecular coupling and molecular dynamics, it was possible to identify the modes of interaction between ISO and bothropic toxins BmooMPα-I, Jararacussin-I and BNSP-7. The present study shows that naphthoquinone isohemigossypolone isolated from the P. aquatica plant inhibited part of the local and systemic damage caused by venom proteins, demonstrating the pharmacological potential of this compound in neutralizing the harmful effects caused by snakebites.
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Affiliation(s)
| | - Benedito Matheus Dos Santos
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo (USP), São Paulo, SP, Brazil
| | - Célio Dias Santos Júnior
- Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil
| | - Vanderlúcia Fonseca de Paula
- Laboratory of Natural Products, Department of Sciences and Technology, State University of Bahia Southwest (UESB), Jequié, BA, Brazil
| | - Mario Sergio Rocha Gomes
- Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil
| | - Glaucio Monteiro Ferreira
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo (USP), São Paulo, SP, Brazil
| | | | - Mario Hiroyuki Hirata
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo (USP), São Paulo, SP, Brazil
| | | | | | - Mirian Machado Mendes
- Special Academic Unit of Biosciences, Federal University of Goiás (UFG), Jataí, GO, Brazil.
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Santana AJ, dos Santos WNL, Silva LOB, das Virgens CF. Removal of mercury(II) ions in aqueous solution using the peel biomass of Pachira aquatica Aubl: kinetics and adsorption equilibrium studies. Environ Monit Assess 2016; 188:293. [PMID: 27084802 DOI: 10.1007/s10661-016-5266-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 03/27/2016] [Indexed: 06/05/2023]
Abstract
Mercury is a highly toxic substance that is a health hazard to humans. This study aims to investigate powders obtained from the peel of the fruit of Pachira aquatica Aubl, in its in natura and/or acidified form, as an adsorbent for the removal of mercury ions in aqueous solution. The materials were characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis. The infrared spectra showed bands corresponding to the axial deformation of carbonyls from carboxylic acids, the most important functional group responsible for fixing the metal species to the adsorbent material. The thermograms displayed mass losses related to the decomposition of three major components, i.e., hemicellulose, cellulose, and lignin. The adsorption process was evaluated using cold-vapor atomic fluorescence spectrometry (CV AFS) and cold-vapor atomic absorption spectrometry (CV AAS). Three isotherm models were employed. The adsorption isotherm model, Langmuir-Freundlich, best represented the adsorption process, and the maximum adsorption capacity was predicted to be 0.71 and 0.58 mg g(-1) at 25 °C in nature and acidified, respectively. Adsorption efficiencies were further tested on real aqueous wastewater samples, and removal of Hg(II) was recorded as 69.6 % for biomass acidified and 76.3 % for biomass in nature. Results obtained from sorption experiments on real aqueous wastewater samples revealed that recovery of the target metal ions was very satisfactory. The pseudo-second-order model showed the best correlation to the experimental data. The current findings showed that the investigated materials are potential adsorbents for mercury(II) ion removal in aqueous solution, with acidified P. aquatica Aubl being the most efficient adsorbent.
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Affiliation(s)
- Andrea J Santana
- Departamento de Ciências Exatas e da Terra, Universidade do Estado da Bahia (UNEB), Campus I-Programa de Pós-Graduação em Química Aplicada (PGQA), Rua Silveira Martins, 2555-Bairro Cabula, Salvador-Bahia, 41195-001, Brazil
| | - Walter N L dos Santos
- Departamento de Ciências Exatas e da Terra, Universidade do Estado da Bahia (UNEB), Campus I-Programa de Pós-Graduação em Química Aplicada (PGQA), Rua Silveira Martins, 2555-Bairro Cabula, Salvador-Bahia, 41195-001, Brazil
| | - Laiana O B Silva
- Departamento de Ciências Exatas e da Terra, Universidade do Estado da Bahia (UNEB), Campus I-Programa de Pós-Graduação em Química Aplicada (PGQA), Rua Silveira Martins, 2555-Bairro Cabula, Salvador-Bahia, 41195-001, Brazil
| | - Cesário F das Virgens
- Departamento de Ciências Exatas e da Terra, Universidade do Estado da Bahia (UNEB), Campus I-Programa de Pós-Graduação em Química Aplicada (PGQA), Rua Silveira Martins, 2555-Bairro Cabula, Salvador-Bahia, 41195-001, Brazil.
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