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Teixeira-Cruz JM, Martins-Ferreira J, Monteiro-Machado M, Strauch MA, de Moraes JA, Amaral LS, Valente RC, Melo PA, Quintas LEM. Heparin prevents the cytotoxic activity of Bothrops jararacussu and Apis mellifera venoms in renal cells. Toxicon 2023; 223:107011. [PMID: 36584790 DOI: 10.1016/j.toxicon.2022.107011] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/20/2022] [Accepted: 12/26/2022] [Indexed: 12/29/2022]
Abstract
Envenomation by Bothrops snakes and Apis mellifera bee may imply systemic disorders which affect well-perfused organs such as kidneys, a process that can lead to acute renal failure. Nevertheless, there is scarce information regarding a direct renal cell effect and the putative antagonism by antivenoms. Here the cytotoxic effect of B. jararacussu and A. mellifera venoms was evaluated in the renal proximal tubule cell line LLC-PK1, as well as the antagonism of this effect by heparin. B. jararacussu venom showed significant cytotoxicity as assessed by LDH release and MTT reduction, with a sharp decline of the cell number after 180 min (>90% at 50 μg/mL). A. mellifera venom produced a much faster and potent cytotoxic activity, conferring almost no viable cells after 15 min at 25 μg/mL. Phase contrast microscopy revealed that while B. jararacussu venom induced a progressive loss of cell adhesion and detachment, A. mellifera venom promoted a rapid plasma membrane disruption and nuclear condensation suggestive of necrotic cell death. Pre-incubation of both venoms with heparin for 30 min significantly reduced cytotoxicity. Our results demonstrate direct toxicity of B. jararacussu and A. mellifera venoms toward renal cells but with distinct kinetics and cell pattern, suggesting different mechanisms of action. In addition, the antagonistic, cytoprotective effect of heparin ascribes such compound as a promising drug for preventing renal failure from envenomation.
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Affiliation(s)
- Jhonatha M Teixeira-Cruz
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Jainne Martins-Ferreira
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Marcos Monteiro-Machado
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Marcelo A Strauch
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil; Instituto Vital Brazil, Niterói, RJ, Brazil
| | - João Alfredo de Moraes
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Luciana S Amaral
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Raphael C Valente
- Núcleo Multidisciplinar de Pesquisa Em Biologia, Universidade Federal do Rio de Janeiro - Campus Duque de Caxias Professor Geraldo Cidade, Rio de Janeiro, Brazil
| | - Paulo A Melo
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Luis Eduardo M Quintas
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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Leite JA, Pôças E, Maia GS, Barbosa L, Quintas LEM, Kawamoto EM, da Silva MLC, Scavone C, de Carvalho LED. Effect of ouabain on calcium signaling in rodent brain: A systematic review of in vitro studies. Front Pharmacol 2022; 13:916312. [PMID: 36105192 PMCID: PMC9465813 DOI: 10.3389/fphar.2022.916312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 07/20/2022] [Indexed: 11/26/2022] Open
Abstract
The Na+/K+-ATPase is an integral membrane ion pump, essential to maintaining osmotic balance in cells in the presence of cardiotonic steroids; more specifically, ouabain can be an endogenous modulator of the Na+/K+-ATPase. Here, we conducted a systematic review of the in vitro effects of cardiotonic steroids on Ca2+ in the brain of rats and mice. Methods: The review was carried out using the PubMed, Virtual Health Library, and EMBASE databases (between 12 June 2020 and 30 June 2020) and followed the guidelines described in the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA). Results: in total, 829 references were identified in the electronic databases; however, only 20 articles were considered, on the basis of the inclusion criteria. The studies demonstrated the effects of ouabain on Ca2+ signaling in synaptosomes, brain slices, and cultures of rat and mouse cells. In addition to the well-known cytotoxic effects of high doses of ouabain, resulting from indirect stimulation of the reverse mode of the Na+/Ca2+ exchanger and increased intracellular Ca2+, other effects have been reported. Ouabain-mediated Ca2+ signaling was able to act increasing cholinergic, noradrenergic and glutamatergic neurotransmission. Furthermore, ouabain significantly increased intracellular signaling molecules such as InsPs, IP3 and cAMP. Moreover treatment with low doses of ouabain stimulated myelin basic protein synthesis. Ouabain-induced intracellular Ca2+ increase may promote the activation of important cell signaling pathways involved in cellular homeostasis and function. Thus, the study of the application of ouabain in low doses being promising for application in neurological diseases. Systematic Review Registration:https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42020204498, identifier CRD42020204498.
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Affiliation(s)
- Jacqueline Alves Leite
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, Brazil
| | - Elisa Pôças
- Campus Realengo, Instituto Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gisele Silva Maia
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindu, São Paulo, Brazil
| | - Leandro Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindu, São Paulo, Brazil
| | - Luis Eduardo M. Quintas
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Elisa Mitiko Kawamoto
- Departamento de Farmacologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | | | - Cristoforo Scavone
- Departamento de Farmacologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Luciana E. Drumond de Carvalho
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindu, São Paulo, Brazil
- *Correspondence: Luciana E. Drumond de Carvalho,
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Costa TGF, Oliveira MM, Toledo MM, Santos HB, Thome RG, Cortes VF, Santos HL, Quintas LEM, Sousa L, Fontes CFL, Barbosa LA. Effect of Fe 3+ on Na,K-ATPase: Unexpected activation of ATP hydrolysis. Biochim Biophys Acta Biomembr 2022; 1864:183868. [PMID: 35063401 DOI: 10.1016/j.bbamem.2022.183868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 05/03/2021] [Revised: 01/10/2022] [Accepted: 01/12/2022] [Indexed: 01/01/2023]
Abstract
Iron is a key element in cell function; however, its excess in iron overload conditions can be harmful through the generation of reactive oxygen species (ROS) and cell oxidative stress. Activity of Na,K-ATPase has been shown to be implicated in cellular iron uptake and iron modulates the Na,K-ATPase function from different tissues. In this study, we determined the effect of iron overload on Na,K-ATPase activity and established the role that isoforms and conformational states of this enzyme has on this effect. Total blood and membrane preparations from erythrocytes (ghost cells), as well as pig kidney and rat brain cortex, and enterocytes cells (Caco-2) were used. In E1-related subconformations, an enzyme activation effect by iron was observed, and in the E2-related subconformations enzyme inhibition was observed. The enzyme's kinetic parameters were significantly changed only in the Na+ curve in ghost cells. In contrast to Na,K-ATPase α2 and α3 isoforms, activation was not observed for the α1 isoform. In Caco-2 cells, which only contain Na,K-ATPase α1 isoform, the FeCl3 increased the intracellular storage of iron, catalase activity, the production of H2O2 and the expression levels of the α1 isoform. In contrast, iron did not affect lipid peroxidation, GSH content, superoxide dismutase and Na,K-ATPase activities. These results suggest that iron itself modulates Na,K-ATPase and that one or more E1-related subconformations seems to be determinant for the sensitivity of iron modulation through a mechanism in which the involvement of the Na, K-ATPase α3 isoform needs to be further investigated.
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Affiliation(s)
- Tamara G F Costa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Marina M Oliveira
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Marina M Toledo
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Helio B Santos
- Laboratório de Processamento de Tecidos, Universidade Federal de São João del-Rei (UFSJ), Campus Centro-Oeste Dona Lindu, Divinópolis, Minas Gerais, Brazil
| | - Ralph G Thome
- Laboratório de Processamento de Tecidos, Universidade Federal de São João del-Rei (UFSJ), Campus Centro-Oeste Dona Lindu, Divinópolis, Minas Gerais, Brazil
| | - Vanessa F Cortes
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Herica L Santos
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Luis Eduardo M Quintas
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Leilismara Sousa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil
| | - Carlos Frederico L Fontes
- Laboratório de Estrutura e Regulação de Proteínas e ATPases, Programa de Biologia Estrutural, Instituto de Bioquímica Médica Leopoldo de Meis, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Leandro A Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei, Campus Centro-Oeste Dona Lindu, Divinopolis, MG, Brazil.
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4
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de Oliveira GC, Rocha SC, da Silva Lopes MA, Paixão N, Alves SLG, Pessoa MTC, Noël F, Quintas LEM, Barbosa LA, Villar JAFP, Cortes VF. Implications of Synthetic Modifications of the Cardiotonic Steroid Lactone Ring on Cytotoxicity. J Membr Biol 2021; 254:487-497. [PMID: 34128090 DOI: 10.1007/s00232-021-00186-x] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 05/08/2021] [Indexed: 01/24/2023]
Abstract
Na,K-ATPase (NKA) and cardiotonic steroids (CTS) have shown potent cytotoxic and anticancer effects. Here, we have synthesized a series of CTS digoxin derivatives (γ-benzylidene) with substitutions in the lactone ring and evaluated the cytotoxicity caused by digoxin derivatives in tumor and non-tumor cells lines, as well as their effects on NKA. The cytotoxicity assay was determined in HeLa, A549, and WI-26 VA4 after they were treated for 48 h with increased concentrations of CTS. The effects of CTS on NKA activity and immunoblotting of α1 and β1 isoforms were evaluated at IC50 concentrations in A549 cell membrane. NKA activity from mouse brain cortex was also measured. The majority of CTS exhibited low cytotoxicity in tumor and non-tumor cells, presenting IC50 values at micromolar concentrations, while digoxin showed cytotoxicity at nanomolar concentrations. BD-15 presented the lowest IC50 value (8 µM) in A549 and reduced its NKA activity in 28%. In contrast, BD-7 was the compound that most inhibited NKA (56% inhibition) and presented high IC50 value for A549. In mouse cortex, only BD-15 modulated the enzyme activity in a concentration-dependent inhibition curve. These results demonstrate that the cytotoxicity of these compounds is not related to NKA inhibition. The substitutions in the lactone ring of digoxin led to an increase in the cytotoxic concentration in tumor cells, which may not be interesting for cancer, but it has the advantage of increasing the therapeutic margin of these molecules when compared to classic CTS, and can be used safely in research for other diseases.
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Affiliation(s)
- Gisele Capanema de Oliveira
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil
| | - Sayonarah Carvalho Rocha
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil
| | - Miliane Alves da Silva Lopes
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal Do Rio de Janeiro, Av Carlos Chagas, 373, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Natasha Paixão
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal Do Rio de Janeiro, Av Carlos Chagas, 373, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Silmara Lúcia Grego Alves
- Laboratório de Síntese Orgânica e Nanoestruturas, Universidade Federal de São João del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil
| | - Marco Túlio Corrêa Pessoa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil.,Marshall Institute for Interdisciplinary Research, Huntington, WV, USA
| | - François Noël
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal Do Rio de Janeiro, Av Carlos Chagas, 373, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Luis Eduardo M Quintas
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal Do Rio de Janeiro, Av Carlos Chagas, 373, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Leandro Augusto Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil
| | - José Augusto Ferreira Perez Villar
- Laboratório de Síntese Orgânica e Nanoestruturas, Universidade Federal de São João del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil.
| | - Vanessa Faria Cortes
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG, 35501-296, Brazil.
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5
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Teixeira-Cruz JM, Strauch MA, Monteiro-Machado M, Tavares-Henriques MS, de Moraes JA, Ribeiro da Cunha LE, Ferreira, Jr. RS, Barraviera B, Quintas LEM, Melo PA. A Novel Apilic Antivenom to Treat Massive, Africanized Honeybee Attacks: A Preclinical Study from the Lethality to Some Biochemical and Pharmacological Activities Neutralization. Toxins (Basel) 2021; 13:toxins13010030. [PMID: 33466223 PMCID: PMC7824798 DOI: 10.3390/toxins13010030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 12/25/2022] Open
Abstract
Massive, Africanized honeybee attacks have increased in Brazil over the years. Humans and animals present local and systemic effects after envenomation, and there is no specific treatment for this potentially lethal event. This study evaluated the ability of a new Apilic antivenom, which is composed of F(ab’)2 fraction of specific immunoglobulins in heterologous and hyperimmune equine serum, to neutralize A. mellifera venom and melittin, in vitro and in vivo, in mice. Animal experiments were performed in according with local ethics committee license (UFRJ protocol no. DFBCICB072-04/16). Venom dose-dependent lethality was diminished with 0.25–0.5 μL of intravenous Apilic antivenom/μg honeybee venom. In vivo injection of 0.1–1 μg/g bee venom induced myotoxicity, hemoconcentration, paw edema, and increase of vascular permeability which were antagonized by Apilic antivenom. Cytotoxicity, assessed in renal LLC-PK1 cells and challenged with 10 μg/mL honeybee venom or melittin, was neutralized by preincubation with Apilic antivenom, as well the hemolytic activity. Apilic antivenom inhibited phospholipase and hyaluronidase enzymatic activities. In flow cytometry experiments, Apilic antivenom neutralized reduction of cell viability due to necrosis by honeybee venom or melittin. These results showed that this antivenom is effective inhibitor of honeybee venom actions. Thus, this next generation of Apilic antivenom emerges as a new promising immunobiological product for the treatment of massive, Africanized honeybee attacks.
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Affiliation(s)
- Jhonatha Mota Teixeira-Cruz
- Graduate Program in Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.M.T.-C.); (M.M.-M.); (M.S.T.-H.); (J.A.d.M.)
| | - Marcelo Abrahão Strauch
- Graduate Program in Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.M.T.-C.); (M.M.-M.); (M.S.T.-H.); (J.A.d.M.)
- Scientific Board, Vital Brazil Institute (IVB), Niterói, Rio de Janeiro 24230-410, Brazil;
- Correspondence: (M.A.S.); (L.E.M.Q.); (P.A.M.)
| | - Marcos Monteiro-Machado
- Graduate Program in Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.M.T.-C.); (M.M.-M.); (M.S.T.-H.); (J.A.d.M.)
| | - Matheus Silva Tavares-Henriques
- Graduate Program in Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.M.T.-C.); (M.M.-M.); (M.S.T.-H.); (J.A.d.M.)
| | - João Alfredo de Moraes
- Graduate Program in Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.M.T.-C.); (M.M.-M.); (M.S.T.-H.); (J.A.d.M.)
| | | | - Rui Seabra Ferreira, Jr.
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP), Botucatu, São Paulo 18610-307, Brazil; (R.S.F.J.); (B.B.)
| | - Benedito Barraviera
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP), Botucatu, São Paulo 18610-307, Brazil; (R.S.F.J.); (B.B.)
| | - Luis Eduardo M. Quintas
- Graduate Program in Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.M.T.-C.); (M.M.-M.); (M.S.T.-H.); (J.A.d.M.)
- Correspondence: (M.A.S.); (L.E.M.Q.); (P.A.M.)
| | - Paulo A. Melo
- Graduate Program in Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (J.M.T.-C.); (M.M.-M.); (M.S.T.-H.); (J.A.d.M.)
- Correspondence: (M.A.S.); (L.E.M.Q.); (P.A.M.)
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Azalim P, do Monte FM, Rendeiro MM, Liu X, O'Doherty GA, Fontes CF, Leitão SG, Quintas LEM, Noël F. Conformational states of the pig kidney Na+/K+-ATPase differently affect bufadienolides and cardenolides: A directed structure-activity and structure-kinetics study. Biochem Pharmacol 2020; 171:113679. [DOI: 10.1016/j.bcp.2019.113679] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 10/21/2019] [Indexed: 10/25/2022]
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Bastos ÚMC, de Andrade Rosa I, Teixeira JD, Gonçalves G, Costa ML, Quintas LEM, Mermelstein C. Isoproterenol induces an increase in muscle fiber size by the proliferation of Pax7-positive cells and in a mTOR-independent mechanism. Cell Biol Int 2019; 43:1425-1434. [PMID: 31166053 PMCID: PMC6900101 DOI: 10.1002/cbin.11190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 04/16/2019] [Accepted: 06/02/2019] [Indexed: 01/24/2023]
Abstract
β-Adrenergic signaling regulates many physiological processes in skeletal muscles. A wealth of evidence has shown that β-agonists can increase skeletal muscle mass in vertebrates. Nevertheless, to date, the specific role of β-adrenergic receptors in different cell phenotypes (myoblasts, fibroblasts, and myotubes) and during the different steps of embryonic skeletal muscle differentiation has not been studied. Therefore, here we address this question through the analysis of embryonic chick primary cultures of skeletal muscle cells during the formation of multinucleated myotubes. We used isoproterenol (ISO), a β-adrenergic receptor agonist, to activate the β-adrenergic signaling and quantified several aspects of muscle differentiation. ISO induced an increase in myoblast proliferation, in the percentage of Pax7-positive myoblasts and in the size of skeletal muscle fibers, suggesting that ISO activates a hyperplasic and hypertrophic muscle response. Interestingly, treatment with ISO did not alter the number of fibroblast cells, suggesting that ISO effects are specific to muscle cells in the case of chick myogenic cell culture. We also show that rapamycin, an inhibitor of the mammalian target of rapamycin signaling pathway, did not prevent the effects of ISO on chick muscle fiber size. The collection of these results provides new insights into the role of β-adrenergic signaling during skeletal muscle proliferation and differentiation and specifically in the regulation of skeletal muscle hyperplasia and hypertrophy.
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Affiliation(s)
- Úrsula Maria C. Bastos
- Cell Differentiation ProgramInstituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroAv. Carlos Chagas Filho 373Rio de JaneiroRJ21941‐902Brazil
| | - Ivone de Andrade Rosa
- Cell Differentiation ProgramInstituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroAv. Carlos Chagas Filho 373Rio de JaneiroRJ21941‐902Brazil
| | - John D. Teixeira
- Cell Differentiation ProgramInstituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroAv. Carlos Chagas Filho 373Rio de JaneiroRJ21941‐902Brazil
| | - Graciele Gonçalves
- Cell Differentiation ProgramInstituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroAv. Carlos Chagas Filho 373Rio de JaneiroRJ21941‐902Brazil
| | - Manoel L. Costa
- Cell Differentiation ProgramInstituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroAv. Carlos Chagas Filho 373Rio de JaneiroRJ21941‐902Brazil
| | - Luis Eduardo M. Quintas
- Cell Differentiation ProgramInstituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroAv. Carlos Chagas Filho 373Rio de JaneiroRJ21941‐902Brazil
| | - Claudia Mermelstein
- Cell Differentiation ProgramInstituto de Ciências Biomédicas, Universidade Federal do Rio de JaneiroAv. Carlos Chagas Filho 373Rio de JaneiroRJ21941‐902Brazil
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8
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Pereira DG, Rendeiro MM, Cortes VF, Barbosa LA, Quintas LEM. Antagonistic anticancer effect of paclitaxel and digoxin combination. J Cell Biochem 2019; 120:13107-13114. [PMID: 30883884 DOI: 10.1002/jcb.28583] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 11/28/2018] [Revised: 01/23/2019] [Accepted: 01/28/2019] [Indexed: 12/21/2022]
Abstract
Despite the growing interest in the antitumor effect of cardiotonic steroids, combination treatments with well-established chemotherapy drugs like paclitaxel have been rarely investigated. Moreover, paclitaxel has been suggested as a Na+ /K+ -ATPase inhibitor. Here we investigated the effect of paclitaxel and digoxin alone or in combination on the viability of human lung (A549) and cervical cancer (HeLa) cell lines and the inhibitory effect of paclitaxel on several mammalian Na+ /K+ -ATPases. Although the viability of both tumor cell lines was concentration-dependently affected by digoxin treatment after 48 hours (A549 IC50 = 31 nM and HeLa IC50 = 151 nM), a partial effect was observed for paclitaxel, with a maximal inhibitory effect of 45% at 1000 nM with A549 and around 70% with HeLa cells (IC50 = 1 nM). Although the two drugs were cytotoxic, their combined effect in HeLa cells was revealed to be antagonistic, as estimated by the combination index. No direct inhibitory effect of paclitaxel was detected in human, pig, rat, and mouse Na+ /K+ -ATPase enzymes, but high concentrations of paclitaxel decreased the Na+ /K+ -ATPase activity in HeLa cells after 48 hours without affecting protein expression. Our findings demonstrate that, under our conditions, paclitaxel and digoxin cotreatment produce antagonistic cytotoxic effects in HeLa cells, and the mechanism of action of paclitaxel does not involve a direct inhibition of Na+ /K+ -ATPase. More studies shall be designed to evaluate the consequences of the interaction of cardiotonic steroids and chemotherapy drugs.
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Affiliation(s)
- Duane Gischewski Pereira
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Divinópolis, Brazil
| | - Mariana Manzano Rendeiro
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vanessa Faria Cortes
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Divinópolis, Brazil
| | - Leandro Augusto Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João del Rei, Campus Centro-Oeste Dona Lindú, Divinópolis, Brazil
| | - Luis Eduardo M Quintas
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Noël F, Azalim P, do Monte FM, Quintas LEM, Katz A, Karlish SJ. Revisiting the binding kinetics and inhibitory potency of cardiac glycosides on Na+,K+-ATPase (α1β1): Methodological considerations. J Pharmacol Toxicol Methods 2018; 94:64-72. [DOI: 10.1016/j.vascn.2018.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/30/2018] [Accepted: 09/18/2018] [Indexed: 12/12/2022]
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10
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Godinho AN, Costa GT, Oliveira NO, Cardi BA, Uchoa DEA, Silveira ER, Quintas LEM, Noël FG, Fonteles MC, Carvalho KM, Santos CF, Lessa LMA, do Nascimento NRF. Effects of cardiotonic steroids on isolated perfused kidney and NHE3 activity in renal proximal tubules. Biochim Biophys Acta Gen Subj 2017; 1861:1943-1950. [PMID: 28506883 DOI: 10.1016/j.bbagen.2017.05.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 05/07/2017] [Accepted: 05/11/2017] [Indexed: 12/11/2022]
Abstract
Cardiotonic steroids (CS) are known as modulators of sodium and water homeostasis. These compounds contribute to the excretion of sodium under overload conditions due to its natriuretic property related to the inhibition of the renal Na+/K+-ATPase (NKA) pump α1 isoform. NHE3, the main route for Na+ reabsorption in the proximal tubule, depends on the Na+ gradient generated by the NKA pump. In the present study we aimed to investigate the effects of marinobufagin (MBG) and telocinobufagin (TBG) on the renal function of isolated perfused rat kidney and on the inhibition of NKA activity. Furthermore, we investigated the mechanisms for the cardiotonic steroid-mediated natriuretic effect, by evaluating and comparing the effects of bufalin (BUF), ouabain (OUA), MBG and TBG on NHE3 activity in the renal proximal tubule in vivo. TBG significantly increased GFR, UF, natriuresis and kaliuresis in isolated perfused rat kidney, and inhibits the activity of NKA at a much higher rate than MBG. By stationary microperfusion technique, the perfusion with BUF, OUA, TBG or MBG promoted an inhibitory effect on NHE3 activity, whereas BUF was the most effective agent, and demonstrated a dose-dependent response, with maximal inhibition at 50nM. Furthermore, our data showed the role of NKA-Src kinase pathway in the inhibition of NHE3 by CS. Finally, a downstream step, MEK1/2-ERK1/2 was also investigated, and, similar to Src inhibition, the MEK1/2 inhibitor (U0126) suppressed the BUF effect. Our findings indicate the involvement of NKA-SRc-Kinase-Ras-Raf-ERK1/2 pathway in the downregulation of NHE3 by cardiotonic steroids in the renal proximal tubule, promoting a reduction of proximal sodium reabsorption and natriuresis.
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Affiliation(s)
- Alana N Godinho
- Biomedical Sciences Superior Institute, State University of Ceará, Fortaleza, Brazil
| | - Graciana T Costa
- Biomedical Sciences Superior Institute, State University of Ceará, Fortaleza, Brazil
| | - Nádia O Oliveira
- Biomedical Sciences Superior Institute, State University of Ceará, Fortaleza, Brazil
| | - Bruno A Cardi
- Biomedical Sciences Superior Institute, State University of Ceará, Fortaleza, Brazil
| | | | | | - Luis Eduardo M Quintas
- Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - François G Noël
- Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Manassés C Fonteles
- Biomedical Sciences Superior Institute, State University of Ceará, Fortaleza, Brazil
| | | | - Cláudia F Santos
- Biomedical Sciences Superior Institute, State University of Ceará, Fortaleza, Brazil
| | - Lucília M A Lessa
- Biomedical Sciences Superior Institute, State University of Ceará, Fortaleza, Brazil
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11
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Perera Córdova WH, Leitão SG, Cunha-Filho G, Bosch RA, Alonso IP, Pereda-Miranda R, Gervou R, Touza NA, Quintas LEM, Noël F. Bufadienolides from parotoid gland secretions of Cuban toad Peltophryne fustiger (Bufonidae): Inhibition of human kidney Na(+)/K(+)-ATPase activity. Toxicon 2015; 110:27-34. [PMID: 26615828 DOI: 10.1016/j.toxicon.2015.11.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [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: 07/14/2015] [Revised: 10/24/2015] [Accepted: 11/18/2015] [Indexed: 12/22/2022]
Abstract
Parotoid gland secretions of toad species are a vast reservoir of bioactive molecules with a wide range of biological properties. Herein, for the first time, it is described the isolation by preparative reversed-phase HPLC and the structure elucidation by NMR spectroscopy and/or mass spectrometry of nine major bufadienolides from parotoid gland secretions of the Cuban endemic toad Peltophryne fustiger: ψ-bufarenogin, gamabufotalin, bufarenogin, arenobufagin, 3-(N-suberoylargininyl) marinobufagin, bufotalinin, telocinobufagin, marinobufagin and bufalin. In addition, the secretion was analyzed by UPLC-MS/MS which also allowed the identification of azelayl arginine. The effect of arenobufagin, bufalin and ψ-bufarenogin on Na(+)/K(+)-ATPase activity in a human kidney preparation was evaluated. These bufadienolides fully inhibited the Na(+)/K(+)-ATPase in a concentration-dependent manner, although arenobufagin (IC50 = 28.3 nM) and bufalin (IC50 = 28.7 nM) were 100 times more potent than ψ-bufarenogin (IC50 = 3020 nM). These results provided evidence about the importance of the hydroxylation at position C-14 in the bufadienolide skeleton for the inhibitory activity on the Na(+)/K(+)-ATPase.
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Affiliation(s)
- Wilmer H Perera Córdova
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, CCS, Bloco A,Ilha do Fundão, 21.941-590 Rio de Janeiro, Brazil.
| | - Suzana Guimarães Leitão
- Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, CCS, Bloco A,Ilha do Fundão, 21.941-590 Rio de Janeiro, Brazil
| | - Geraldino Cunha-Filho
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, CCS Bloco J, Ilha do Fundão, 21941-902, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Roberto Alonso Bosch
- Facultad de Biología, Universidad de La Habana, Calle 25 No. 455, Vedado, Havana City, Cuba
| | - Isel Pascual Alonso
- Facultad de Biología, Universidad de La Habana, Calle 25 No. 455, Vedado, Havana City, Cuba
| | - Rogelio Pereda-Miranda
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City, 04510 DF, Mexico
| | - Rodrigo Gervou
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, CCS Bloco J, Ilha do Fundão, 21941-902, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Natália Araújo Touza
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, CCS Bloco J, Ilha do Fundão, 21941-902, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luis Eduardo M Quintas
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, CCS Bloco J, Ilha do Fundão, 21941-902, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - François Noël
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, CCS Bloco J, Ilha do Fundão, 21941-902, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Alves SLG, Paixão N, Ferreira LGR, Santos FRS, Neves LDR, Oliveira GC, Cortes VF, Salomé KS, Barison A, Santos FV, Cenzi G, Varotti FP, Oliveira SMF, Taranto AG, Comar M, Silva LM, Noël F, Quintas LEM, Barbosa LA, Villar JAFP. γ-Benzylidene digoxin derivatives synthesis and molecular modeling: Evaluation of anticancer and the Na,K-ATPase activity effect. Bioorg Med Chem 2015; 23:4397-4404. [PMID: 26122772 DOI: 10.1016/j.bmc.2015.06.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 03/06/2015] [Revised: 05/30/2015] [Accepted: 06/10/2015] [Indexed: 02/06/2023]
Abstract
Cardiotonic steroids (CS), natural compounds with traditional use in cardiology, have been recently suggested to exert potent anticancer effects. However, the repertoire of molecules with Na,K-ATPase activity and anticancer properties is limited. This paper describes the synthesis of 6 new digoxin derivatives substituted (on the C17-butenolide) with γ-benzylidene group and their cytotoxic effect on human fibroblast (WI-26 VA4) and cancer (HeLa and RKO) cell lines as well as their effect on Na,K-ATPase activity and expression. As digoxin, compound BD-4 was almost 100-fold more potent than the other derivatives for cytotoxicity with the three types of cells used and was also the only one able to fully inhibit the Na,K-ATPase of HeLa cells after 24h treatment. No change in the Na,K-ATPase α1 isoform protein expression was detected. On the other hand it was 30-40 fold less potent for direct Na,K-ATPase inhibition, when compared to the most potent derivatives, BD-1 and BD-3, and digoxin. The data presented here demonstrated that the anticancer effect of digoxin derivatives substituted with γ-benzylidene were not related with their inhibition of Na,K-ATPase activity or alteration of its expression, suggesting that this classical molecular mechanism of CS is not involved in the cytotoxic effect of our derivatives.
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Affiliation(s)
- Silmara L G Alves
- Laboratório de Síntese Orgânica e NanoEstruturas, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG CEP 35501-296, Brazil
| | - Natasha Paixão
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Av Carlos Chagas, 373, 21941-902 Rio de Janeiro, Brazil
| | - Letícia G R Ferreira
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Felipe R S Santos
- Laboratório de Síntese Orgânica e NanoEstruturas, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG CEP 35501-296, Brazil
| | - Luiza D R Neves
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Gisele C Oliveira
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Vanessa F Cortes
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Kahlil S Salomé
- Laboratório de RMN, Universidade Federal do Paraná, 81.531-990 Curitiba, PR, Brazil
| | - Andersson Barison
- Laboratório de RMN, Universidade Federal do Paraná, 81.531-990 Curitiba, PR, Brazil
| | - Fabio V Santos
- Laboratório de Biologia Celular e Mutagenicidade, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Gisele Cenzi
- Laboratório de Bioquímica de Parasitos, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Fernando P Varotti
- Laboratório de Bioquímica de Parasitos, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Soraya M F Oliveira
- Laboratório de Bioinformática, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Alex G Taranto
- Laboratório de Bioinformática, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Moacyr Comar
- Laboratório de Bioinformática, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - Luciana M Silva
- Laboratório de Biologia Celular e Inovação Biotecnológica, Fundação Ezequiel Dias, Rua Conde Pereira Carneiro 80, 305010-010 Belo Horizonte, Brazil
| | - François Noël
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Av Carlos Chagas, 373, 21941-902 Rio de Janeiro, Brazil
| | - Luis Eduardo M Quintas
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Av Carlos Chagas, 373, 21941-902 Rio de Janeiro, Brazil
| | - Leandro A Barbosa
- Laboratório de Bioquímica Celular, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Divinópolis, MG 35501-296, Brazil
| | - José A F P Villar
- Laboratório de Síntese Orgânica e NanoEstruturas, Universidade Federal de São João Del Rei, Campus Centro Oeste Dona Lindu, Av Sebastião Gonçalves Coelho, 400, Bairro Chanadour, Divinópolis, MG CEP 35501-296, Brazil.
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Pessoa MTC, Neves LD, Rocha SC, Alves SL, Villar JAF, Silva LM, Oliveira SM, Taranto AG, Gomes IV, Santos FV, Quintas LEM, Noel FG, Santos HL, Barbosa LA. Effect Of 21‐Benzylidene Digoxin On Cancer Cells: A Cardenolide With No Inhibitory Effect On Na,K‐ATPase Activity. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.560.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bettero GM, Salles L, Rosário Figueira RM, Poser GV, Rates SMK, Noël F, Quintas LEM. In vitro effect of valepotriates isolated from Valeriana glechomifolia on rat P-type ATPases. Planta Med 2011; 77:1702-1706. [PMID: 21567360 DOI: 10.1055/s-0030-1271084] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Valepotriates are iridoids found in variable amounts in Valerianaceae and might be among the bioactive compounds which confer anxiolytic properties to the Valeriana species. On the other hand, unspecific cytotoxicity has also been described. Presently, however, no particular molecular target has been defined for these compounds. Here we studied the effect of valtrate, acevaltrate, and 1- β-acevaltrate isolated from Valeriana glechomifolia on the enzymatic activity of rat P-type ATPases. Valepotriates did not affect rat skeletal muscle sarco/endoplasmic reticulum Ca²⁺-ATPase (SERCA) activity at the highest concentration used (100 µM). In contrast, the same concentration inhibited roughly half of the total H⁺/K⁺-ATPase activity from rat gastric epithelium (valtrate 54.6 ± 3.2 %, acevaltrate 60.7 ± 7.3 %, 1- β-acevaltrate 50.2 ± 3.1 %; mean ± SEM, n = 3-5). Finally, these substances showed the highest inhibitory potency toward Na⁺/K⁺-ATPase, and the inhibition curves obtained provided a similar IC₅₀ (in µM) for rat kidney α1 isoform (valtrate 21.2, acevaltrate 22.8, 1- β-acevaltrate 24.4) and brain hemispheres α2/ α3 isoforms (valtrate 19.4, acevaltrate 42.3, 1- β-acevaltrate 38.3). Our results suggest that P-type ATPases are differentially inhibited by valepotriates and that Na⁺/K⁺-ATPase might be one of their molecular targets in vivo.
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Affiliation(s)
- Gustavo M Bettero
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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15
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Touza NA, Pôças ESC, Quintas LEM, Cunha-Filho G, Santos ML, Noël F. Inhibitory effect of combinations of digoxin and endogenous cardiotonic steroids on Na+/K+-ATPase activity in human kidney membrane preparation. Life Sci 2011; 88:39-42. [DOI: 10.1016/j.lfs.2010.10.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Revised: 09/22/2010] [Accepted: 10/19/2010] [Indexed: 09/30/2022]
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Schaffazick N, Amaral LS, Fonseca TF, Tomaz MA, Gaban GA, Borges PA, Calil-Elias S, Noël F, Melo PA, Quintas LEM, Cunha VM. Effect of heparin treatment on the expression and activity of different ion-motive P-type ATPase isoforms from mouse extensor digitorum longus muscle during degeneration and regeneration after Bothrops jararacussu venom injection. Toxicon 2010; 55:52-60. [DOI: 10.1016/j.toxicon.2009.06.032] [Citation(s) in RCA: 6] [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] [Received: 05/26/2009] [Revised: 06/26/2009] [Accepted: 06/26/2009] [Indexed: 12/17/2022]
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Quintas LEM, Noël F. Mechanisms of adaptive supersensitivity in vas deferens. Auton Neurosci 2009; 146:38-46. [PMID: 19188094 DOI: 10.1016/j.autneu.2009.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2008] [Revised: 12/27/2008] [Accepted: 01/06/2009] [Indexed: 10/24/2022]
Abstract
Adaptive supersensitivity is a phenomenon characteristic of excitable tissues and discloses as a compensatory adjustment of tissue's response to unrelated stimulatory endogenous and exogenous substances after chronic interruption of excitatory neurotransmission. The mechanisms underlying such higher postjunctional sensitivity have been postulated for a variety of cell types. In smooth muscles, especially the vas deferens with its rich sympathetic innervation, the mechanisms responsible for supersensitivity are partly understood and appear to be different from one species to another. The present review provides a general understanding of adaptive supersensitivity and emphasizes early and recent information about the putative mechanisms involved in this phenomenon in rodent vas deferens.
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Affiliation(s)
- Luis Eduardo M Quintas
- Laboratório de Farmacologia Bioquímica e Molecular, ICB, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho 373, J-17, Rio de Janeiro 21941-902, Brazil.
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Abstract
Here, we show that the Na/K-ATPase interacts with caveolin-1 (Cav1) and regulates Cav1 trafficking. Graded knockdown of Na/K-ATPase decreases the plasma membrane pool of Cav1, which results in a significant reduction in the number of caveolae on the cell surface. These effects are independent of the pumping function of Na/K-ATPase, and instead depend on interaction between Na/K-ATPase and Cav1 mediated by an N-terminal caveolin-binding motif within the ATPase α1 subunit. Moreover, knockdown of the Na/K-ATPase increases basal levels of active Src and stimulates endocytosis of Cav1 from the plasma membrane. Microtubule-dependent long-range directional trafficking in Na/K-ATPase–depleted cells results in perinuclear accumulation of Cav1-positive vesicles. Finally, Na/K-ATPase knockdown has no effect on processing or exit of Cav1 from the Golgi. Thus, the Na/K-ATPase regulates Cav1 endocytic trafficking and stabilizes the Cav1 plasma membrane pool.
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Affiliation(s)
- Ting Cai
- Department of Physiology and Pharmacology, University of Toledo College of Medicine, Health Science Campus, Toledo, OH 43614, USA
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Araujo FP, Quintas LEM, Noël F, Silva CLM. Schistosoma mansoni infection enhances host portal vein contraction: role of potassium channels and p38 MAP kinase. Microbes Infect 2007; 9:1020-5. [PMID: 17544802 DOI: 10.1016/j.micinf.2007.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 03/16/2007] [Accepted: 04/11/2007] [Indexed: 11/17/2022]
Abstract
Murine Schistosoma mansoni infection is related to an increased contraction of portal vein in response to 5-hydroxytryptamine (5-HT). The present study addressed a putative alteration of ion channels and enzymes involved in vascular contraction. In control group, either inhibition of K+ channels sensitive to ATP (K(ATP)) or Ca2+ (BK(Ca)) increased 5-HT-induced contraction, but the same did not occur in infected mice. On the other hand, inhibition of p38 MAP kinase markedly decreased the vascular contraction to 5-HT in the infected mice with minor effects in the control group. Accordingly, we observed a higher density of phospho-p38 MAP kinase, that refers to the fully active state of the enzyme, in portal veins from infected mice as compared to control animals. These results suggest that the reduced function of K(ATP) and BK(Ca) channels along with an increased contribution of p38 MAP kinase contribute to the increased contraction of portal veins to 5-HT observed in murine schistosomiasis.
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Affiliation(s)
- F P Araujo
- Departamento de Farmacologia Básica & Clínica, Universidade Federal do Rio de Janeiro, CCS, sl. J01-17, Cidade Universitária, Rio de Janeiro, RJ 21941-590, Brazil
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Quintas LEM, Noël F, Wibo M. Na+/K+-ATPase α isoforms expression in stroke-prone spontaneously hypertensive rat heart ventricles: Effect of salt loading and lacidipine treatment. Eur J Pharmacol 2007; 565:151-7. [PMID: 17451677 DOI: 10.1016/j.ejphar.2007.03.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2007] [Accepted: 03/13/2007] [Indexed: 11/23/2022]
Abstract
Changes in myocardial expression of Na+/K+-ATPase alpha-subunit isoforms have been demonstrated in different models of cardiac hypertrophy and hypertension. Here we studied the expression of these isozymes in stroke-prone spontaneously hypertensive rats (SHRSP) and the influence of high salt diet and treatment with the dihydropyridine lacidipine. Adult SHRSP were offered either 1% NaCl or water as drinking solution for 6 weeks. Salt-loaded SHRSP were treated or not with 1 mg/kg/day lacidipine. Compared to Wistar Kyoto (WKY) rats, non-salt-loaded SHRSP presented significant hypertension and cardiac hypertrophy. Salt intake markedly enhanced cardiac hypertrophy, an effect blunted by lacidipine. [3H]Ouabain binding assays on total particulate fractions from heart ventricles revealed the existence of two high-affinity sites with Kd approximately 25 and approximately 200 nM, ascribed to the alpha3 and alpha2 isoforms, respectively. Bmax of alpha3 was unexpectedly high (40% of total high-affinity binding) in ventricles from WKY rats but very low in all groups of SHRSP. On the other hand, Bmax of alpha2 was similar in WKY and non-salt-loaded SHRSP; however, salt loading of SHRSP resulted in a Bmax reduction of 20% (P<0.05), an effect blocked by lacidipine. These effects were largely confirmed by immunoblotting analysis, which, in addition, demonstrated that the density of the ubiquitous alpha1 isoform was comparable among the experimental groups. In conclusion, WKY rats showed a high myocardial expression of the Na+/K+-ATPase alpha3 subunit, which was not found in SHRSP; the level of the alpha2 isoform was similar in untreated SHRSP and WKY; salt-loading of SHRSP promoted reduction of the alpha2 isoform, and this effect was completely hampered by lacidipine.
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Affiliation(s)
- Luis Eduardo M Quintas
- Departamento de Farmacologia Básica e Clínica, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Cidade Universitária, 21941-590, Rio de Janeiro, Brazil
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Corrêa AD, Siqueira-Batista R, Quintas LEM, Siqueira-Batista R. [Similia Similibus Curentur: revisiting historical aspects of homeopathy nine years later]. Hist Cienc Saude Manguinhos 2006; 13:13-31. [PMID: 17580427 DOI: 10.1590/s0104-59702006000100002] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Revising earlier conceptual misconstructions and delving deeper into the historical debate on the origins of homeopathy, this text returns to discussions initiated in the article "Simila Similibus Curentur: historical notes on homeopathic medicine" (1997). Research has been based on two main sources: ancient texts--Corpus Hippocraticum and works by Galen, Paracelsus, and Hahnemann--and the studies of commentators. In the nine years since original publication, previously explored content has undergone gradual revision, some points have been corrected, and discussions have developed further, lending substantially greater maturity to earlier positions. 'Born' in the eighteenth century yet rooted in the very origins of Western medicine, homeopathy is endeavoring to blossom in the twenty-first century as a specialty that wants to be autonomous but that needs the legitimacy of 'traditional' medical science.
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Affiliation(s)
- Anderson Domingues Corrêa
- Centro Federal de Educação Tecnológica de Química de Nilópolis, RJ, Rua Lucio Tavares, 1045, Centro 26530-060 Nilópolis, RJ, Brasil.
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Quintas LEM, Cunha VMN, Scaramello CBV, da Silva CLM, Caricati-Neto A, Lafayette SSL, Jurkiewicz A, Noël F. Adaptive expression pattern of different proteins involved in cellular calcium homeostasis in denervated rat vas deferens. Eur J Pharmacol 2005; 525:54-9. [PMID: 16289527 DOI: 10.1016/j.ejphar.2005.10.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2005] [Revised: 08/23/2005] [Accepted: 10/07/2005] [Indexed: 11/15/2022]
Abstract
The activity and protein expression of plasma membrane and sarco(endo)plasmic reticulum (Ca2+-Mg2+)ATPases and ryanodine receptors were investigated in surgically denervated rat vas deferens. The function of thapsigargin-sensitive but not thapsigargin-resistant (Ca2+-Mg2+)ATPase (from sarco(endo)plasmic reticulum and plasma membrane, respectively), evidenced by enzyme activity and Ca2+ uptake experiments, was significantly depressed by 30-50% when compared to innervated vas. Western blots showed that such reduction in sarco(endo)plasmic reticulum (Ca2+-Mg2+)ATPase performance was accompanied by a decrement of similar magnitude in sarco(endo)plasmic reticulum (Ca2+-Mg2+)ATPase type 2 protein expression, without any significant change in plasma membrane (Ca2+-Mg2+)ATPase expression. Finally, [3H]ryanodine binding revealed that the density of ryanodine binding sites was reduced by 45% after denervation without modification in affinity. The present findings demonstrate that sarco(endo)plasmic reticulum proteins involved in intracellular calcium homeostasis are clearly down-regulated and brings further evidence of a modified calcium translocation in denervated rat vas deferens.
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Affiliation(s)
- Luis Eduardo M Quintas
- Departamento de Farmacologia Básica e Clínica, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Cidade Universitária, 21941-590, Rio de Janeiro, Brazil
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Quintas LEM, Lafayette SSL, Caricati-Neto A, Jurkiewicz A, Noël F. Role of noradrenaline on the expression of the Na+/K+-ATPase alpha2 isoform and the contractility of cultured rat vas deferens. Biochem Pharmacol 2002; 64:1431-7. [PMID: 12417256 DOI: 10.1016/s0006-2952(02)01359-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rat vasa deferentia were cultured for 3 days in Dulbecco's modified Eagle's medium in the absence or presence of 1 microM noradrenaline (NA) to investigate if the lack of NA release is the key factor to explain the selective reduction of the Na(+)/K(+)-ATPase alpha(2) isoform previously observed after in vivo denervation of this organ (Quintas et al., Biochem Pharmacol 2000;60:741-7). The lack of effects of the indirect sympathomimetic tyramine and the neuronal amine uptake blocker cocaine on NA curves indicated that cultured organs were denervated completely. Organ culture induced supersensitivity, expressed as a 6.3-fold increase of pD(2) and a 42% elevation of maximal contraction for NA but not for Ba(2+). Western blotting indicated that the level of the alpha(1) isoform of Na(+)/K(+)-ATPase was unchanged after organ culture, but the alpha(2) isoform was down-regulated drastically to levels that were barely detectable. The addition of NA to the culture medium did not prevent the reduction of alpha(2) expression although it did impede NA supersensitivity (in fact a 4-fold decrease of pD(2) and a 32% reduction of maximal response were observed after incubation in the presence of NA). A striking reduction of L-type Ca(2+) channel expression also was observed, indicated by an 85% decrease of [3H]isradipine binding sites. These data suggest that NA is a trophic factor relevant to the control of muscle contraction, mediated by alpha(1)-adrenoceptors, but not to the expression of either Na(+)/K(+)-ATPase or the L-type Ca(2+) channel.
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Affiliation(s)
- Luis Eduardo M Quintas
- Departamento de Farmacologia Básica e Clínica, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Cidade Universitária, 21941-590 Rio de Janeiro, Brazil
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Abstract
The four isoforms of the catalytic subunit of Na(+)/K(+)-ATPase identified in rats differ in their affinities for ions and ouabain. Moreover, its expression is tissue-specific, developmentally and hormonally regulated. The aim of the present work was to evaluate the influence of age on the ratio and density of these isoforms in crude membrane preparations from rat brain hemispheres, brainstem, heart ventricles and kidneys. In all tissues investigated, Na(+)/K(+)-ATPase activity was higher in adults than in neonates but brain tissues presented the most remarkable differences. In these tissues, ouabain inhibition curves for Na(+)/K(+)-ATPase activity revealed the presence of two processes with different sensitivities to ouabain. An increase of approximately sixfold in the expression of the high affinity isoforms was observed between newborn and adult rats. In contrast, the low affinity isoform increased only approximately twofold in brainstem whereas it increased ninefold in brain hemispheres. Unlike brain tissues, a decrease (almost fourfold) in the number of high affinity ouabain binding sites was observed during ontogenesis of the heart. Although limited by the inability to resolve alpha(2) and alpha(3) isoforms, present data indicate that the influence of development on the expression of Na(+)/K(+)-ATPase depends not only on the isoform, but also on the tissue where the enzyme is expressed.
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Affiliation(s)
- Luciane B Lopez
- Departamento de Farmacologia Básica e Clínica, ICB, Universidade Federal do Rio de Janeiro, Ilha do Fundäo, 21941-590 Rio de Janeiro, RJ, Brazil
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