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Nascimento ALA, de Oliveira Souza S, Guimarães AS, Figueiredo IM, de Albuquerque Dias T, Gomes FS, Botero WG, Santos JCC. Investigation on humic substance and tetracycline interaction mechanism: biophysical and theoretical studies and assessing their effect on biological activity. Environ Sci Pollut Res Int 2024; 31:20172-20187. [PMID: 38369661 DOI: 10.1007/s11356-024-32168-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/25/2023] [Accepted: 01/20/2024] [Indexed: 02/20/2024]
Abstract
Tetracycline (TC) is a widely used antibiotic, and evaluating its interaction with humic substances (HS) that act as a complexing agent in the environment is essential to understanding the availability of this contaminant in the environment. This study evaluated the interaction between HS and TC using different spectroscopic techniques, theoretical studies, and biological assays simulating environmental conditions. TC interacts with HS, preferably by electrostatic forces, with a binding constant of 9.2 × 103 M-1 (30 °C). This process induces conformational changes in the superstructure, preferably in the HS, like protein fraction. Besides, studies using the 8-anilino-1-naphthalene sulfonate (ANS) probe indicated that the antibiotic alters the hydrophobicity degree on HS's surface. Synchronized fluorescence shows that the TC interaction occurs preferentially with the protein-like fraction of soil organic matter (KSV = 26.28 ± 1.03 M-1). The TC epitope was evaluated by 1H NMR and varied according to the pH (4.8 and 9.0) of the medium, as well as the main forces responsible for the stabilization of the HS-TC complex. The molecular docking studies showed that the formation of the HS-TC complex is carried out spontaneously (ΔG = -7.1 kcal mol-1) and is stabilized by hydrogen bonds and electrostatic interactions, as observed in the experimental spectroscopic results. Finally, biological assays indicated that HS influenced the antimicrobial activity of TC. Thus, this study contributed to understanding the dynamics and distribution of TC in the environment and HS's potential in the remediation of antibiotics of this class in natural systems, as these can have adverse effects on ecosystems and human health.
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Affiliation(s)
| | - Shenia de Oliveira Souza
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceio, AL, 57072-900, Brazil
| | - Ari Souza Guimarães
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceio, AL, 57072-900, Brazil
| | - Isis Martins Figueiredo
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceio, AL, 57072-900, Brazil
| | | | - Francis Soares Gomes
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceio, AL, 57072-900, Brazil
| | - Wander Gustavo Botero
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceio, AL, 57072-900, Brazil
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Nascimento ALA, Figueiredo IM, Botero WG, Santos JCC. Interaction between roxarsone, an organic arsenic compound, with humic substances in the soil simulating environmental conditions. Chemosphere 2023; 339:139688. [PMID: 37532198 DOI: 10.1016/j.chemosphere.2023.139688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 06/15/2023] [Revised: 07/10/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
In environmental systems, the soil is a principal route of contamination by various potentially toxic species. Roxarsone (RX) is an arsenic (V) organic compound used to treat parasitic diseases and as an additive for animal fattening. When the animal excretes RX, the residues may lead to environmental contamination. Due to their physicochemical properties, the soil's humic substances (HS) are important in species distribution in the environment and are involved in various specific interaction/adsorption processes. Since RX, an arsenic (V) compound, is considered an emerging contaminant, its interaction with HS was evaluated in simulated environmental conditions. The HS-RX interaction was analyzed by monitoring intrinsic HS fluorescence intensity variations caused by complexation with RX, forming non-fluorescent supramolecular complexes that yielded a binding constant Kb (on the order of 103). The HS-RX interaction occurred through static quenching due to complex formation in the ground state, which was confirmed by spectrophotometry. The process was spontaneous (ΔG < 0), and the predominant interaction forces were van der Waals and hydrogen bonding (ΔH < 0 and ΔS < 0), with an electrostatic component evidenced by the influence of ionic strength in the interaction process. Structural changes in the HS were verified by synchronized and 3D fluorescence, with higher variation in the region referring to the protein-like fraction. In addition, metal ions (except ions Cu(II)) favored HS-RX interaction. When interacting with HS, the RX epitope was suggested by 1H NMR, which indicated that the entire molecule interacts with the superstructure. An enzyme inhibition assay verified the ability to reduce the alkaline phosphatase activity of free and complexed RX (RX-HS). Finally, this work revealed the main parameters associated with HS and RX interaction in simulated environmental conditions, thus, providing data that may help our understanding of the dynamics of organic arsenic-influenced soils.
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Affiliation(s)
- Amanda Luise A Nascimento
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A.C. Simões, 57072-900, Maceió, Alagoas, Brazil
| | - Isis Martins Figueiredo
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A.C. Simões, 57072-900, Maceió, Alagoas, Brazil
| | - Wander Gustavo Botero
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A.C. Simões, 57072-900, Maceió, Alagoas, Brazil
| | - Josué Carinhanha Caldas Santos
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A.C. Simões, 57072-900, Maceió, Alagoas, Brazil.
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de Barros WA, Nunes CDS, Souza JADCR, Nascimento IJDS, Figueiredo IM, de Aquino TM, Vieira L, Farias D, Santos JCC, de Fátima Â. The new psychoactive substances 25H-NBOMe and 25H-NBOH induce abnormal development in the zebrafish embryo and interact in the DNA major groove. Curr Res Toxicol 2021; 2:386-398. [PMID: 34888530 PMCID: PMC8637007 DOI: 10.1016/j.crtox.2021.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 07/29/2021] [Revised: 10/19/2021] [Accepted: 11/18/2021] [Indexed: 11/24/2022] Open
Abstract
25H-NBOMe and 25H-NBOH recreational drugs induces abnormal formation in zebrafish embryos. Biophysical and theoretical studies indicate that these drugs have affinity for the DNA major groove. The toxicity observed in the zebrafish embryos and DNA interaction may be correlated.
Toxicological effects of 25H-NBOMe and 25H-NBOH recreational drugs on zebrafish embryos and larvae at the end of 96 h exposure period were demonstrated. 25H-NBOH and 25H-NBOMe caused high embryo mortality at 80 and 100 µg mL−1, respectively. According to the decrease in the concentration tested, lethality decreased while non-lethal effects were predominant up to 10 and 50 µg mL−1 of 25H-NBOH and 25H-NBOMe, respectively, including spine malformation, egg hatching delay, body malformation, otolith malformation, pericardial edema, and blood clotting. We can disclose that these drugs have an affinity for DNA in vitro using biophysical spectroscopic assays and molecular modeling methods. The experiments demonstrated that 25H-NBOH and 25H-NBOMe bind to the unclassical major groove of ctDNA with a binding constant of 27.00 × 104 M−1 and 5.27 × 104 M−1, respectively. Furthermore, these interactions lead to conformational changes in the DNA structure. Therefore, the results observed in the zebrafish embryos and DNA may be correlated.
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Affiliation(s)
- Wellington Alves de Barros
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Camila da Silva Nunes
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceió, AL, Brazil
| | | | | | | | | | - Leonardo Vieira
- Departamento de Biologia Molecular, Universidade Federal da Paraíba, João Pessoa, PB, Brazil
| | - Davi Farias
- Departamento de Biologia Molecular, Universidade Federal da Paraíba, João Pessoa, PB, Brazil
| | | | - Ângelo de Fátima
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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de Barros WA, Silva MDM, Dantas MDDA, Santos JCC, Figueiredo IM, Chaves OA, Sant’Anna CMR, de Fátima Â. Recreational drugs 25I-NBOH and 25I-NBOMe bind to both Sudlow's sites I and II of human serum albumin (HSA): biophysical and molecular modeling studies. NEW J CHEM 2021. [DOI: 10.1039/d1nj00806d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
25I-NBOH and 25I-NBOMe simultaneously bind to sites I and II of HSA, which may affect their distribution and effects.
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Affiliation(s)
- Wellington Alves de Barros
- Departamento de Química
- Instituto de Ciências Exatas
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
| | | | | | | | | | - Otávio Augusto Chaves
- Departamento de Química Fundamental
- Instituto de Química
- Universidade Federal Rural do Rio de Janeiro
- Seropédica
- Brazil
| | - Carlos Mauricio R. Sant’Anna
- Departamento de Química Fundamental
- Instituto de Química
- Universidade Federal Rural do Rio de Janeiro
- Seropédica
- Brazil
| | - Ângelo de Fátima
- Departamento de Química
- Instituto de Ciências Exatas
- Universidade Federal de Minas Gerais
- Belo Horizonte
- Brazil
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de Magalhães Silva M, de Araújo Dantas MD, da Silva Filho RC, Dos Santos Sales MV, de Almeida Xavier J, Leite ACR, Goulart MOF, Grillo LAM, de Barros WA, de Fátima Â, Figueiredo IM, Santos JCC. Toxicity of thimerosal in biological systems: Conformational changes in human hemoglobin, decrease of oxygen binding capacity, increase of protein glycation and amyloid's formation. Int J Biol Macromol 2020; 154:661-671. [PMID: 32198046 DOI: 10.1016/j.ijbiomac.2020.03.156] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/11/2020] [Accepted: 03/16/2020] [Indexed: 02/06/2023]
Abstract
Thimerosal (TH), an organomercurial compound, is used as a preservative in vaccines and cosmetics. Its interaction with human hemoglobin (Hb) was investigated under physiological conditions using biophysical and biological assays, aiming to evaluate hazardous effects. TH interacts spontaneously with Hb (stoichiometry 2:1, ligand-protein), preferably by electrostatic forces, with a binding constant of 1.41 × 106 M-1. Spectroscopic data allows to proposing that TH induces structural changes in Hg, through ethylmercury transfer to human Hb-Cys93 residues, forming thiosalicylic acid, which, in turn, interacts with the positive side of the amino acid in the Hb-HgEt adduct chain. As a consequence, inhibition of Hb-O2 binding capacity up to 72% (human Hb), and 50% (human erythrocytes), was verified. Dose-dependent induction of TH forming advanced glycation end products (AGE) and protein aggregates (amyloids) was additionally observed. Finally, these results highlight the toxic potential of the use of TH in biological systems, with a consequent risk to human health.
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Affiliation(s)
- Marina de Magalhães Silva
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Maria Dayanne de Araújo Dantas
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Reginaldo Correia da Silva Filho
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Marcos Vinicius Dos Santos Sales
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Jadriane de Almeida Xavier
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Ana Catarina Rezende Leite
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Marília Oliveira Fonseca Goulart
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | | | - Wellington Alves de Barros
- Department of Chemistry, Federal University of Minas Gerais (UFMG), 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Ângelo de Fátima
- Department of Chemistry, Federal University of Minas Gerais (UFMG), 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Isis Martins Figueiredo
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Josué Carinhanha Caldas Santos
- Institute of Chemistry and Biotechnology, Federal University of Alagoas (UFAL), Campus A.C. Simões, 57072-900 Maceió, Alagoas, Brazil.
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de Lyra ACF, Dos Santos Silva AL, Dos Santos ECL, López AMQ, da Silva JCS, Figueiredo IM, Santos JCC. Molecular interaction of sulfonamides and ovalbumin, an allergenic egg protein, exploring biophysical, theoretical and biological studies. Spectrochim Acta A Mol Biomol Spectrosc 2020; 228:117747. [PMID: 31727521 DOI: 10.1016/j.saa.2019.117747] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 08/03/2019] [Revised: 10/27/2019] [Accepted: 11/01/2019] [Indexed: 06/10/2023]
Abstract
Biophysical, theoretical and biological in vitro studies were carried out to evaluate the interaction of the main allergen protein of egg white (ovalbumin, OVA) with sulphonamides (SA): sulphathiazole (S1), sulfaquinoxaline (S2), sulfadimethoxine (S3) and sulfamethazine (S4). The binding constants for the OVA-SA supramolecular complexes ranged from 1.20 to 30.66 × 105 M-1, observing the following order of affinity: S1 > S2 > S4 > S3. The preferential forces in the stabilization of the OVA complexes with S2 and S3 were hydrogen bonds and Van der Waals forces, whereas for OVA-S1 and OVAS4, were electrostatic interactions. Interaction process led to a change in the native structure of the protein, which may potentiate its natural allergenicity. Cations Ca(II), Mg(II) and Fe(III) favor the interaction of OVA with S1 and S2. The theoretical studies performed were consistent with the spectroscopic data. Finally, it was found that the interaction process for sulfonamides evaluated with OVA change the inhibition activity profile these antibiotics against strains of Escherichia coli ATCC 25922 and Bacillus megaterium APFSG3isox, but not the minimal inhibitory concentration values.
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Affiliation(s)
- Ana Carolina Fradique de Lyra
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A. C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Amanda L Dos Santos Silva
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A. C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Elane Cristina L Dos Santos
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A. C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Ana Maria Queijeiro López
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A. C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Júlio Cosme S da Silva
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A. C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Isis Martins Figueiredo
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A. C. Simões, 57072-900 Maceió, Alagoas, Brazil
| | - Josué Carinhanha Caldas Santos
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Campus A. C. Simões, 57072-900 Maceió, Alagoas, Brazil.
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Braga TC, Silva TF, Maciel TMS, da Silva ECD, da Silva-Júnior EF, Modolo LV, Figueiredo IM, Santos JCC, de Aquino TM, de Fátima Â. Ionic liquid-assisted synthesis of dihydropyrimidin(thi)one Biginelli adducts and investigation of their mechanism of urease inhibition. NEW J CHEM 2019. [DOI: 10.1039/c9nj03556g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three out of twenty-six synthesized Biginelli adducts were identified as potent competitive urease inhibitors.
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Santos RVD, Lima ARBD, Oliveira PCCD, Figueiredo IM, Santos JCC. EVALUATION OF THE RADICAL N, N-DIETHYL-1,4-FENILENEDIANIME (DEPD •+) AS A SPECTROPHOTOMETRIC PROBE FOR DETERMINING ANTIOXIDANT CAPACITIES IN BEVEREGES. QUIM NOVA 2015. [DOI: 10.5935/0100-4042.20150103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Savariz FC, Foglio MA, Goes Ruiz ALT, da Costa WF, de Magalhães Silva M, Santos JCC, Figueiredo IM, Meyer E, de Carvalho JE, Sarragiotto MH. Synthesis and antitumor activity of novel 1-substituted phenyl 3-(2-oxo-1,3,4-oxadiazol-5-yl) β-carbolines and their Mannich bases. Bioorg Med Chem 2014; 22:6867-75. [DOI: 10.1016/j.bmc.2014.10.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 10/15/2014] [Accepted: 10/23/2014] [Indexed: 01/06/2023]
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Cabeça LF, Figueiredo IM, de Paula E, Marsaioli AJ. Prilocaine-cyclodextrin-liposome: effect of pH variations on the encapsulation and topology of a ternary complex using 1H NMR. Magn Reson Chem 2011; 49:295-300. [PMID: 21452355 DOI: 10.1002/mrc.2740] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2010] [Revised: 01/10/2011] [Accepted: 01/18/2011] [Indexed: 05/30/2023]
Abstract
A better comprehension of the prilocaine (PLC)-β-cyclodextrin (β-CD) complex liberation to membranes was provided by studying the architectural supramolecular arrangements of PLC, β-CD and egg phosphatidylcholine (EPC) liposomes, a membrane model. The topologies and possible interactions of mixtures of PLC, β-CD and EPC liposomes were investigated by nuclear magnetic resonances combining experimental (1)H-NMR (1D ROESY, STD and DOSY) at different pHs. The results indicate that in the mixture PLC/β-CD/EPC at pH 10 the PLC molecules are almost totally embedded into the liposomes and little interaction was observed between PLC and β-CD. However, at pH 5.5 not only was PLC imbedded in the EPC bilayer, but PLC was also interacting with β-CD. These results were rationalized as a spontaneous PLC release from β-CD to liposomes vesicles, whereas the PLC/EPC complex formation was higher at pH 10 than pH 5.5.
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Figueiredo IM, Marsaioli AJ. Mapeamento das interações proteína-ligante através de técnicas de RMN de ¹H utilizando detecção do ligante. QUIM NOVA 2007. [DOI: 10.1590/s0100-40422007000700019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Leal-Cardoso JH, Coelho-de-Souza AN, Souza IT, Figueiredo IM. Effects of eugenol on excitation-contraction coupling in skeletal muscle. Arch Int Pharmacodyn Ther 1994; 327:113-124. [PMID: 7944823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The effects of eugenol on the excitation-contraction coupling of the toad (Bufo paracnemis) sartorius were studied. Eugenol (0.1-2.5 mM) blocked the contracture induced by 80 mM K+. At 2.5 mM, it decreased the depolarization, induced by 80 mM K+, by 14 mV. This is not sufficient to explain the complete blockade of the potassium contracture. At higher concentrations (3-12 mM), eugenol induced contractures, without causing a depolarization of the membrane. Contractures were blocked by procaine and potentiated by caffeine and by cooling of the muscle. For concentrations of eugenol in the upper range of the dose-response curve (10 mM), the contracture was independent of the Ca++ concentration in the medium. At lower concentrations (5 mM), the contractures induced by eugenol were potentiated by divalent cations, in the order: Mg++ < Ba++ < Zn++ < Co++ < Ca++ < Mn++. We infer that the eugenol-induced contractures are caused, primarily, by a release of Ca++ from the sarcoplasmic reticulum and, secondarily, by a mechanism related to the presence of some divalent cations in the extracellular space.
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Affiliation(s)
- J H Leal-Cardoso
- Departamento de Fisiologia e Farmacologia, Universidade Federal do Ceara, Fortaleza, Brasil
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