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Rodrigo AP, Moutinho Cabral I, Alexandre A, Costa PM. Exploration of Toxins from a Marine Annelid: An Analysis of Phyllotoxins and Accompanying Bioactives. Animals (Basel) 2024; 14:635. [PMID: 38396603 PMCID: PMC10885894 DOI: 10.3390/ani14040635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
Proteinaceous toxins are peptides or proteins that hold great biotechnological value, evidenced by their ecological role, whether as defense or predation mechanisms. Bioprospecting using bioinformatics and omics may render screening for novel bioactives more expeditious, especially considering the immense diversity of toxin-secreting marine organisms. Eulalia sp. (Annelida: Phyllodocidae), a toxin bearing marine annelid, was recently shown to secrete cysteine-rich protein (Crisp) toxins (hitherto referred to as 'phyllotoxins') that can immobilize its prey. By analyzing and validating transcriptomic data, we narrowed the list of isolated full coding sequences of transcripts of the most abundant toxins or accompanying bioactives secreted by the species (the phyllotoxin Crisp, hyaluronidase, serine protease, and peptidases M12A, M13, and M12B). Through homology matching with human proteins, the biotechnological potential of the marine annelid's toxins and related proteins was tentatively associated with coagulative and anti-inflammatory responses for the peptidases PepM12A, SePr, PepM12B, and PepM13, and with the neurotoxic activity of Crisp, and finally, hyaluronidase was inferred to bear properties of an permeabilizing agent. The in silico analysis succeeded by validation by PCR and Sanger sequencing enabled us to retrieve cDNAs can may be used for the heterologous expression of these toxins.
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Affiliation(s)
- Ana P. Rodrigo
- Associate Laboratory i4HB Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal; (I.M.C.); (A.A.)
- UCIBIO Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
| | - Inês Moutinho Cabral
- Associate Laboratory i4HB Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal; (I.M.C.); (A.A.)
- UCIBIO Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
| | - António Alexandre
- Associate Laboratory i4HB Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal; (I.M.C.); (A.A.)
- UCIBIO Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
| | - Pedro M. Costa
- Associate Laboratory i4HB Institute for Health and Bioeconomy, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal; (I.M.C.); (A.A.)
- UCIBIO Applied Molecular Biosciences Unit, Department of Life Sciences, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
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Vivas-Ruiz DE, Rosas P, Proleón A, Torrejón D, Lazo F, Tenorio-Ricca AB, Guajardo F, Almarza C, Andrades V, Astorga J, Oropesa D, Toledo J, Vera MJ, Martínez J, Araya-Maturana R, Dubois-Camacho K, Hermoso MA, Alvarenga VG, Sanchez EF, Yarlequé A, Oliveira LS, Urra FA. Pictolysin-III, a Hemorrhagic Type-III Metalloproteinase Isolated from Bothrops pictus (Serpentes: Viperidae) Venom, Reduces Mitochondrial Respiration and Induces Cytokine Secretion in Epithelial and Stromal Cell Lines. Pharmaceutics 2023; 15:pharmaceutics15051533. [PMID: 37242775 DOI: 10.3390/pharmaceutics15051533] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 04/22/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023] Open
Abstract
From the venom of the Bothrops pictus snake, an endemic species from Peru, we recently have described toxins that inhibited platelet aggregation and cancer cell migration. In this work, we characterize a novel P-III class snake venom metalloproteinase, called pictolysin-III (Pic-III). It is a 62 kDa proteinase that hydrolyzes dimethyl casein, azocasein, gelatin, fibrinogen, and fibrin. The cations Mg2+ and Ca2+ enhanced its enzymatic activity, whereas Zn2+ inhibited it. In addition, EDTA and marimastat were also effective inhibitors. The amino acid sequence deduced from cDNA shows a multidomain structure that includes a proprotein, metalloproteinase, disintegrin-like, and cysteine-rich domains. Additionally, Pic-III reduces the convulxin- and thrombin-stimulated platelet aggregation and in vivo, it has hemorrhagic activity (DHM = 0.3 µg). In epithelial cell lines (MDA-MB-231 and Caco-2) and RMF-621 fibroblast, it triggers morphological changes that are accompanied by a decrease in mitochondrial respiration, glycolysis, and ATP levels, and an increase in NAD(P)H, mitochondrial ROS, and cytokine secretion. Moreover, Pic-III sensitizes to the cytotoxic BH3 mimetic drug ABT-199 (Venetoclax) in MDA-MB-231 cells. To our knowledge, Pic-III is the first SVMP reported with action on mitochondrial bioenergetics and may offer novel opportunities for promising lead compounds that inhibit platelet aggregation or ECM-cancer-cell interactions.
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Affiliation(s)
- Dan E Vivas-Ruiz
- Laboratorio de Biología Molecular, Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima Cercado, Lima 15081, Peru
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
| | - Paola Rosas
- Laboratorio de Biología Molecular, Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima Cercado, Lima 15081, Peru
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
| | - Alex Proleón
- Laboratorio de Biología Molecular, Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima Cercado, Lima 15081, Peru
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
| | - Daniel Torrejón
- Laboratorio de Biología Molecular, Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima Cercado, Lima 15081, Peru
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
| | - Fanny Lazo
- Laboratorio de Biología Molecular, Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima Cercado, Lima 15081, Peru
| | - Ana Belén Tenorio-Ricca
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Metabolic Plasticity and Bioenergetics Laboratory, Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Av. Independencia 1027, Santiago 7810000, Chile
| | - Francisco Guajardo
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Metabolic Plasticity and Bioenergetics Laboratory, Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Av. Independencia 1027, Santiago 7810000, Chile
| | - Cristopher Almarza
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Metabolic Plasticity and Bioenergetics Laboratory, Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Av. Independencia 1027, Santiago 7810000, Chile
| | - Víctor Andrades
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Metabolic Plasticity and Bioenergetics Laboratory, Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Av. Independencia 1027, Santiago 7810000, Chile
| | - Jessica Astorga
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Metabolic Plasticity and Bioenergetics Laboratory, Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Av. Independencia 1027, Santiago 7810000, Chile
| | - Daniel Oropesa
- Advanced Scientific Equipment Network (REDECA), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile
| | - Jorge Toledo
- Advanced Scientific Equipment Network (REDECA), Faculty of Medicine, Universidad de Chile, Santiago 8380453, Chile
| | - María Jesús Vera
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Laboratorio de Biología Celular, INTA, University of Chile, Santiago 7810000, Chile
| | - Jorge Martínez
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Laboratorio de Biología Celular, INTA, University of Chile, Santiago 7810000, Chile
| | - Ramiro Araya-Maturana
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Instituto de Química de Recursos Naturales, Universidad de Talca, Talca 3460000, Chile
| | - Karen Dubois-Camacho
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Metabolic Plasticity and Bioenergetics Laboratory, Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Av. Independencia 1027, Santiago 7810000, Chile
| | - Marcela A Hermoso
- Laboratory of Innate Immunity, Program of Immunology, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago 7810000, Chile
- Department of Gastroenterology and Hepatology, University Medical Center Groningen, 9713 Groningen, The Netherlands
| | - Valéria G Alvarenga
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- Laboratory of Biochemistry of Proteins from Animal Venoms, Research and Development Center, Ezequiel Dias Foundation, Belo Horizonte 30510-010, Brazil
| | - Eladio Flores Sanchez
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- Laboratory of Biochemistry of Proteins from Animal Venoms, Research and Development Center, Ezequiel Dias Foundation, Belo Horizonte 30510-010, Brazil
| | - Armando Yarlequé
- Laboratorio de Biología Molecular, Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima Cercado, Lima 15081, Peru
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- Laboratory of Biochemistry of Proteins from Animal Venoms, Research and Development Center, Ezequiel Dias Foundation, Belo Horizonte 30510-010, Brazil
| | - Luciana Souza Oliveira
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- Laboratory of Biochemistry of Proteins from Animal Venoms, Research and Development Center, Ezequiel Dias Foundation, Belo Horizonte 30510-010, Brazil
| | - Félix A Urra
- Network for Snake Venom Research and Drug Discovery, Av. Independencia 1027, Santiago 7810000, Chile
- MIBI: Interdisciplinary Group on Mitochondrial Targeting and Bioenergetics, Universidad de Talca, Talca 3460000, Chile
- Metabolic Plasticity and Bioenergetics Laboratory, Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Av. Independencia 1027, Santiago 7810000, Chile
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Abstract
The deleterious consequences of snake envenomation are due to the extreme protein complexity of snake venoms. Therefore, the identification of their components is crucial for understanding the clinical manifestations of envenomation pathophysiology and for the development of effective antivenoms. In addition, snake venoms are considered as libraries of bioactive molecules that can be used to develop innovative drugs. Numerous separation and analytical techniques are combined to study snake venom composition including chromatographic techniques such as size exclusion and RP-HPLC and electrophoretic techniques. Herein, we present in detail these existing techniques and their applications in snake venom research. In the first part, we discuss the different possible technical combinations that could be used to isolate and purify SV proteins using what is known as bioassay-guided fractionation. In the second part, we describe four different proteomic strategies that could be applied for venomics studies to evaluate whole venom composition, including the mostly used technique: RP-HPLC. Eventually, we show that to date, there is no standard technique used for the separation of all snake venoms. Thus, different combinations might be developed, taking into consideration the main objective of the study, the available resources, and the properties of the target molecules to be isolated.
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Venom proteomic analysis of medically important Nigerian viper Echis ocellatus and Bitis arietans snake species. Biochem Biophys Rep 2021; 28:101164. [PMID: 34765747 PMCID: PMC8571701 DOI: 10.1016/j.bbrep.2021.101164] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/13/2021] [Accepted: 10/25/2021] [Indexed: 11/29/2022] Open
Abstract
Snakebite envenoming remains a neglected tropical disease which poses severe health hazard, especially for the rural inhabitants in Africa. In Nigeria, vipers are responsible for the highest number of deaths. Hydrophilic interaction liquid chromatography coupled with LC-MS/MS was used to analyze the crude venoms of Echis ocellatus (Carpet viper) and Bitis arietans (Puff adder) in order to understand their venom proteomic identities. Results obtained revealed that gel-free proteomic analysis of the crude venoms led to the identification of 85 and 79 proteins, respectively. Seventy-eight (78) proteins were common between the two snake species with a 91.8% similarity score. The identified proteins belong to 18 protein families in E. ocellatus and 14 protein families in B. arietans. Serine proteases (22.31%) and metalloproteinases (21.06%) were the dominant proteins in the venom of B. arietans; while metalloproteinases (34.84%), phospholipase A2s (21.19%) and serine proteases (15.50%) represent the major toxins in the E. ocellatus venom. Other protein families such as three-finger toxins and cysteine-rich venom proteins were detected in low proportions. This study provides an insight into the venom proteomic analysis of the two Nigerian viper species, which could be useful in identifying the toxin families to be neutralized in case of envenomation. Venom proteomic of Nigeria's most medically important snakes is presented. SVMP, SVSP and PLA2 were the major toxin families in E. ocellatus and B. arietans. The venom proteomes of these vipers displayed 91.8% similarity in composition.
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5
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Oliveira LS, Estevão-Costa MI, Alvarenga VG, Vivas-Ruiz DE, Yarleque A, Lima AM, Cavaco A, Eble JA, Sanchez EF. Atroxlysin-III, A Metalloproteinase from the Venom of the Peruvian Pit Viper Snake Bothrops atrox (Jergón) Induces Glycoprotein VI Shedding and Impairs Platelet Function. Molecules 2019; 24:molecules24193489. [PMID: 31561469 PMCID: PMC6803841 DOI: 10.3390/molecules24193489] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 01/28/2023] Open
Abstract
Atroxlysin-III (Atr-III) was purified from the venom of Bothrops atrox. This 56-kDa protein bears N-linked glycoconjugates and is a P-III hemorrhagic metalloproteinase. Its cDNA-deduced amino acid sequence reveals a multidomain structure including a proprotein, a metalloproteinase, a disintegrin-like and a cysteine-rich domain. Its identity with bothropasin and jararhagin from Bothrops jararaca is 97% and 95%, respectively. Its enzymatic activity is metal ion-dependent. The divalent cations, Mg2+ and Ca2+, enhance its activity, whereas excess Zn2+ inhibits it. Chemical modification of the Zn2+-complexing histidine residues within the active site by using diethylpyrocarbonate (DEPC) inactivates it. Atr-III degrades plasma fibronectin, type I-collagen, and mainly the α-chains of fibrinogen and fibrin. The von Willebrand factor (vWF) A1-domain, which harbors the binding site for GPIb, is not hydrolyzed. Platelets interact with collagen via receptors for collagen, glycoprotein VI (GPVI), and α2β1 integrin. Neither the α2β1 integrin nor its collagen-binding A-domain is fragmented by Atr-III. In contrast, Atr-III cleaves glycoprotein VI (GPVI) into a soluble ~55-kDa fragment (sGPVI). Thereby, it inhibits aggregation of platelets which had been stimulated by convulxin, a GPVI agonist. Selectively, Atr-III targets GPVI antagonistically and thus contributes to the antithrombotic effect of envenomation by Bothrops atrox.
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Affiliation(s)
- Luciana S Oliveira
- Research and Development Center, Ezequiel Dias Foundation, 30510-010 Belo Horizonte, MG, Brazil.
| | - Maria Inácia Estevão-Costa
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, 48149 Münster, Germany.
| | - Valéria G Alvarenga
- Research and Development Center, Ezequiel Dias Foundation, 30510-010 Belo Horizonte, MG, Brazil.
| | - Dan E Vivas-Ruiz
- Laboratorio de Biología Molecular-Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima 01, Lima 14-0576, Peru.
| | - Armando Yarleque
- Laboratorio de Biología Molecular-Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima 01, Lima 14-0576, Peru.
| | - Augusto Martins Lima
- Laboratory of Hemodynamics and Cardiovascular Technology, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - Ana Cavaco
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, 48149 Münster, Germany.
| | - Johannes A Eble
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, 48149 Münster, Germany.
| | - Eladio F Sanchez
- Research and Development Center, Ezequiel Dias Foundation, 30510-010 Belo Horizonte, MG, Brazil.
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Cesar PHS, Braga MA, Trento MVC, Menaldo DL, Marcussi S. Snake Venom Disintegrins: An Overview of their Interaction with Integrins. Curr Drug Targets 2019; 20:465-477. [DOI: 10.2174/1389450119666181022154737] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 10/16/2018] [Accepted: 10/17/2018] [Indexed: 12/12/2022]
Abstract
Disintegrins are non-enzymatic proteins that interfere on cell–cell interactions and signal transduction, contributing to the toxicity of snake venoms and play an essential role in envenomations. Most of their pharmacological and toxic effects are the result of the interaction of these molecules with cell surface ligands, which has been widely described and studied. These proteins may act on platelets, leading to hemorrhage, and may also induce apoptosis and cytotoxicity, which highlights a high pharmacological potential for the development of thrombolytic and antitumor agents. Additionally, these molecules interfere with the functions of integrins by altering various cellular processes such as migration, adhesion and proliferation. This review gathers information on functional characteristics of disintegrins isolated from snake venoms, emphasizing a comprehensive view of the possibility of direct use of these molecules in the development of new drugs, or even indirectly as structural models.
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Affiliation(s)
- Pedro Henrique Souza Cesar
- Department of Chemistry, Biochemistry Laboratory, Federal University of Lavras (UFLA), Lavras, Minas Gerais, 37200-000, Brazil
| | - Mariana Aparecida Braga
- Department of Chemistry, Biochemistry Laboratory, Federal University of Lavras (UFLA), Lavras, Minas Gerais, 37200-000, Brazil
| | - Marcus Vinicius Cardoso Trento
- Department of Chemistry, Biochemistry Laboratory, Federal University of Lavras (UFLA), Lavras, Minas Gerais, 37200-000, Brazil
| | - Danilo Luccas Menaldo
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of Sao Paulo (FCFRP-USP), Ribeirão Preto-SP, Brazil
| | - Silvana Marcussi
- Department of Chemistry, Biochemistry Laboratory, Federal University of Lavras (UFLA), Lavras, Minas Gerais, 37200-000, Brazil
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Malacarne PF, Menezes TN, Martins CW, Naumann GB, Gomes HL, Pires RGW, Figueiredo SG, Campos FV. Advances in the characterization of the Scorpaena plumieri cytolytic toxin (Sp-CTx). Toxicon 2018; 150:220-227. [PMID: 29902539 DOI: 10.1016/j.toxicon.2018.06.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/29/2018] [Accepted: 06/08/2018] [Indexed: 01/22/2023]
Abstract
Proteins that account for the hemolytic activity found in scorpaeniform fish venoms are responsible for the majority of the effects observed upon envenomation, for instance, neurotoxic, cardiotoxic and inflammatory effects. These multifunctional toxins, described as protein lethal factors and referred to as cytolysins, are known to be extremely labile molecules. In the present work, we endeavored to overcome this constraint by determining optimal storage conditions for Sp-CTx, the major bioactive component from the scorpionfish Scorpaena plumieri venom. This cardiotoxic hemolytic cytolysin is a large dimeric glycoprotein (subunits of ≈65 kDa) with pore-forming ability. We were able to establish storage conditions that allowed us to keep the toxin partially active for up to 60 days. Stability was achieved by storing Sp-CTx at -80 and -196 °C in the presence of glycerol 10% in a pH 7.4 solution. It was demonstrated that the hemolytic activity of Sp-CTx is calcium dependent, being abolished by EDTA and zinc ions. Furthermore, the toxin exhibited its maximal hemolytic activity at pH between 8 and 9, displaying typical N- and O- linked glycoconjugated residues (galactose (1-4) N-acetylglucosamine and sialic acid (2-3) galactose in N- and/or O-glycan complexes). The hemolytic activity of Sp-CTx was inhibited by phosphatidylglycerol and phosphatidylethanolamine, suggesting a direct electrostatic interaction lipid - toxin in the pore-formation mechanism of action of this toxin. In addition, we observed that the hemolytic activity was inhibited by increasing doses of cholesterol. Finally, we were able to show, for first time, that Sp-CTx is at least partially responsible for the pain and inflammation observed upon envenomation. However, while the edema induced by Sp-CTx was reduced by pre-treatment with aprotinin and HOE-140, pointing to the involvement of the kallikrein-kinin system in this response, these drugs had no significant effect in the toxin-induced nociception. Taken together, our results could suggest that, as has been already reported for other fish cytolysins, Sp-CTx acts mostly through lipid-dependent pore formation not only in erythrocytes but also in other cell types, which could account for the pain observed upon envenomation. We believe that the present work paves the way towards the complete characterization of fish cytolysins.
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Affiliation(s)
- Pedro F Malacarne
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Av. Marechal Campos 1468, Maruípe, 29043-900, Vitória, ES, Brazil.
| | - Thiago N Menezes
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Av. Marechal Campos 1468, Maruípe, 29043-900, Vitória, ES, Brazil.
| | - Cleciane W Martins
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Av. Marechal Campos 1468, Maruípe, 29043-900, Vitória, ES, Brazil.
| | - Gustavo B Naumann
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Av. Marechal Campos 1468, Maruípe, 29043-900, Vitória, ES, Brazil; Diretoria do Centro de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Rua Conde Pereira Carneiro 80, Gameleira, 30510-010, Belo Horizonte, MG, Brazil.
| | - Helena L Gomes
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Av. Marechal Campos 1468, Maruípe, 29043-900, Vitória, ES, Brazil.
| | - Rita G W Pires
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Av. Marechal Campos 1468, Maruípe, 29043-900, Vitória, ES, Brazil.
| | - Suely G Figueiredo
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Av. Marechal Campos 1468, Maruípe, 29043-900, Vitória, ES, Brazil.
| | - Fabiana V Campos
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Av. Marechal Campos 1468, Maruípe, 29043-900, Vitória, ES, Brazil.
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8
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Sanchez EF, Flores-Ortiz RJ, Alvarenga VG, Eble JA. Direct Fibrinolytic Snake Venom Metalloproteinases Affecting Hemostasis: Structural, Biochemical Features and Therapeutic Potential. Toxins (Basel) 2017; 9:toxins9120392. [PMID: 29206190 PMCID: PMC5744112 DOI: 10.3390/toxins9120392] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 11/24/2017] [Accepted: 11/27/2017] [Indexed: 02/06/2023] Open
Abstract
Snake venom metalloproteinases (SVMPs) are predominant in viperid venoms, which provoke hemorrhage and affect hemostasis and thrombosis. P-I class enzymes consist only of a single metalloproteinase domain. Despite sharing high sequence homology, only some of them induce hemorrhage. They have direct fibrin(ogen)olytic activity. Their main biological substrate is fibrin(ogen), whose Aα-chain is degraded rapidly and independently of activation of plasminogen. It is important to understand their biochemical and physiological mechanisms, as well as their applications, to study the etiology of some human diseases and to identify sites of potential intervention. As compared to all current antiplatelet therapies to treat cardiovascular events, the SVMPs have outstanding biochemical attributes: (a) they are insensitive to plasma serine proteinase inhibitors; (b) they have the potential to avoid bleeding risk; (c) mechanistically, they are inactivated/cleared by α2-macroglobulin that limits their range of action in circulation; and (d) few of them also impair platelet aggregation that represent an important target for therapeutic intervention. This review will briefly highlight the structure–function relationships of these few direct-acting fibrinolytic agents, including, barnettlysin-I, isolated from Bothrops barnetti venom, that could be considered as potential agent to treat major thrombotic disorders. Some of their pharmacological advantages are compared with plasmin.
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Affiliation(s)
- Eladio F Sanchez
- Research and Development Center, Ezequiel Dias Foundation, Belo Horizonte 30510-010, MG, Brazil.
| | - Renzo J Flores-Ortiz
- Graduate Program in Nursing, Federal University of Minas Gerais, Belo Horizonte 30130-100, MG, Brazil.
| | - Valeria G Alvarenga
- Research and Development Center, Ezequiel Dias Foundation, Belo Horizonte 30510-010, MG, Brazil.
| | - Johannes A Eble
- Institute for Physiological Chemistry and Pathobiochemistry, University of Münster, 15, 48149 Muenster, Germany.
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A New Platelet-Aggregation-Inhibiting Factor Isolated from Bothrops moojeni Snake Venom. BIOMED RESEARCH INTERNATIONAL 2017; 2017:4315832. [PMID: 29226136 PMCID: PMC5687129 DOI: 10.1155/2017/4315832] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/12/2017] [Accepted: 09/24/2017] [Indexed: 11/29/2022]
Abstract
This work reports the purification and functional characterization of BmooPAi, a platelet-aggregation-inhibiting factor from Bothrops moojeni snake venom. The toxin was purified by a combination of three chromatographic steps (ion-exchange on DEAE-Sephacel, molecular exclusion on Sephadex G-75, and affinity chromatography on HiTrap™ Heparin HP). BmooPAi was found to be a single-chain protein with an apparent molecular mass of 32 kDa on 14% SDS-PAGE, under reducing conditions. Sequencing of BmooPAi by Edman degradation revealed the amino acid sequence LGPDIVPPNELLEVM. The toxin was devoid of proteolytic, haemorrhagic, defibrinating, or coagulant activities and induced no significant oedema or hyperalgesia. BmooPAi showed a rather specific inhibitory effect on ristocetin-induced platelet aggregation in human platelet-rich plasma, whereas it had little or no effect on platelet aggregation induced by collagen and adenosine diphosphate. The results presented in this work suggest that BmooPAi is a toxin comprised of disintegrin-like and cysteine-rich domains, originating from autolysis/proteolysis of PIII SVMPs from B. moojeni snake venom. This toxin may be of medical interest because it is a platelet aggregation inhibitor, which could potentially be developed as a novel therapeutic agent to prevent and/or treat patients with thrombotic disorders.
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Matias MS, de Sousa BB, da Cunha Pereira DF, Dias EHV, Mamede CCN, de Queiroz MR, Silva ACA, Dantas NO, Soares AM, de Oliveira Costa J, de Oliveira F. BaltDC: purification, characterization and infrared spectroscopy of an antiplatelet DC protein isolated from Bothrops alternatus snake venom. J Venom Anim Toxins Incl Trop Dis 2017; 23:36. [PMID: 28775739 PMCID: PMC5534087 DOI: 10.1186/s40409-017-0126-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 07/12/2017] [Indexed: 12/29/2022] Open
Abstract
Background Snake venoms are a complex mixture of proteins, organic and inorganic compounds. Some of these proteins, enzymatic or non-enzymatic ones, are able to interact with platelet receptors, causing hemostatic disorders. The possible therapeutic potential of toxins with antiplatelet properties may arouse interest in the pharmacological areas. The present study aimed to purify and characterize an antiplatelet DC protein from Bothrops alternatus snake venom. Methods The protein, called BaltDC (DC protein from B. alternatus snake venom), was purified by a combination of ion-exchange chromatography on DEAE-Sephacel column and gel filtration on Sephadex G-75. The molecular mass was estimated by polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate (SDS-PAGE). The amino acid sequence of the N-terminal region was carried out by Edman degradation method. Platelet aggregation assays were performed in human platelet-rich plasma (PRP). Infrared (IR) spectroscopy was used in order to elucidate the interactions between BaltDC and platelet membrane. Results BaltDC ran as a single protein band on SDS-PAGE and showed apparent molecular mass of 32 kDa under reducing or non-reducing conditions. The N-terminal region of the purified protein revealed the amino acid sequence IISPPVCGNELLEVGEECDCGTPENCQNECCDA, which showed identity with other snake venom metalloproteinases (SVMPs). BaltDC was devoid of proteolytic, hemorrhagic, defibrinating or coagulant activities, but it showed a specific inhibitory effect on platelet aggregation induced by ristocetin and epinephrine in PRP. IR analysis spectra strongly suggests that PO32− groups, present in BaltDC, form hydrogen bonds with the PO2− groups present in the non-lipid portion of the membrane platelets. Conclusions BaltDC may be of medical interest since it was able to inhibit platelet aggregation.
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Affiliation(s)
- Mariana Santos Matias
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil
| | - Bruna Barbosa de Sousa
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil.,National Institute of Science and Technology in Nanobiopharmaceutics (N-Biofar), Belo Horizonte, MG Brazil
| | - Déborah Fernanda da Cunha Pereira
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil
| | - Edigar Henrique Vaz Dias
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil
| | - Carla Cristine Neves Mamede
- Institute of Agricultural Sciences, Federal University of Uberlândia (UFU), Monte Carmelo, MG Brazil.,National Institute of Science and Technology in Nanobiopharmaceutics (N-Biofar), Belo Horizonte, MG Brazil
| | - Mayara Ribeiro de Queiroz
- National Institute of Science and Technology in Nanobiopharmaceutics (N-Biofar), Belo Horizonte, MG Brazil
| | | | | | - Andreimar Martins Soares
- Center for the Study of Biomolecules Applied to Health (CEBio), Oswaldo Cruz Foundation (Fiocruz - Rondônia) and Health Group, Federal University of Rondônia (UNIR), Porto Velho, RO Brazil.,University Center São Lucas (UniSL), Porto Velho, RO Brazil
| | - Júnia de Oliveira Costa
- Postgraduate Program in Genetics and Biochemistry, Institute of Genetics and Biochemistry, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil.,Federal Institute of Education, Science and Technology of Triângulo Mineiro (IFTM), Campus Ituiutaba, Ituiutaba, MG Brazil
| | - Fábio de Oliveira
- Institute of Biomedical Sciences, Federal University of Uberlândia (UFU), Uberlândia, MG Brazil.,National Institute of Science and Technology in Nanobiopharmaceutics (N-Biofar), Belo Horizonte, MG Brazil
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11
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Choi JH, Kim SM. Characterization of a novel hatching enzyme purified from starfish Asterina pectinifera. SPRINGERPLUS 2016; 5:1998. [PMID: 27933254 PMCID: PMC5120168 DOI: 10.1186/s40064-016-3484-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 10/06/2016] [Indexed: 12/20/2022]
Abstract
Hatching enzyme is a protease which can degrade the membrane of egg. In this study, a hatching enzyme was purified from starfish (Asterina pectinifera) with 6.34 fold of purification rate, 5.04 % of yield, and 73.87 U/mg of specific activity. The molecular weight of starfish hatching enzyme was 86 kDa, which was reduced to 62 kDa after removal of N-linked oligosaccharides. The optimal pH and temperature of the hatching enzyme activity were pH 7.0 and 40 °C, respectively, while those of stability were pH 8 and 20 °C. The kinetic parameters, Vmax, Km, Kcat and Kcat/Km values were 0.197 U/ml, 0.289 mg/ml, 112.57 s−1, and 389.52 ml/mg s, respectively. Zn2+ increased the enzyme activity by 167.28 %, while EDTA, TPCK, TGCK, leupeptin, PMSF, and TLCK decreased. In addition, Ca2+, Mg2+, and Cu2+ did not affect the enzyme activity. The starfish hatching enzyme activity pretreated with EDTA was recovered by Zn2+. Therefore, the starfish hatching enzyme was classified as a serine-zinc protease.
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Affiliation(s)
- Ji Hoon Choi
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 7 Jukheon-gil, Gangneung, 25457 Republic of Korea
| | - Sang Moo Kim
- Department of Marine Food Science and Technology, Gangneung-Wonju National University, 7 Jukheon-gil, Gangneung, 25457 Republic of Korea
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12
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Estevao-Costa MI, Gontijo SS, Correia BL, Yarleque A, Vivas-Ruiz D, Rodrigues E, Chávez-Olortegui C, Oliveira LS, Sanchez EF. Neutralization of toxicological activities of medically-relevant Bothrops snake venoms and relevant toxins by two polyvalent bothropic antivenoms produced in Peru and Brazil. Toxicon 2016; 122:67-77. [PMID: 27641748 DOI: 10.1016/j.toxicon.2016.09.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/29/2016] [Accepted: 09/14/2016] [Indexed: 11/25/2022]
Abstract
Snakebite envenoming is a neglected public pathology, affecting especially rural communities or isolated areas of tropical and subtropical Latin American countries. The parenteral administration of antivenom is the mainstay and the only validated treatment of snake bite envenoming. Here, we assess the efficacy of polyspecific anti-Bothrops serum (α-BS) produced in the Instituto Nacional de Salud (INS, Peru) and at the Fundação Ezequiel Dias (FUNED, Brazil), to neutralize the main toxic activities induced by five medically-relevant venoms of: Bothrops atrox, B. barnetti, and B. pictus from Peru, and the Brazilian B. jararaca and B. leucurus, all of them inhabiting different geographical locations. Protein electrophoretic patterns of these venoms showed significant differences in composition, number and intensity of bands. Another goal was to evaluate the efficacy and safety of lyophilized α-BS developed at INS to neutralize the detrimental effects of these venoms using in vivo and in vitro assays. The availability of lyophilized α-BS has relevant significance in its distribution to distant rural communities where the access to antivenom in health facilities is more difficult. Despite the fact that different antigen mixtures were used for immunization during antivenom production, our data showed high toxin-neutralizing activity of α-BS raised against Bothrops venoms. Moreover, the antivenom cross-reacted even against venoms not included in the immunization mixture. Furthermore, we have evaluated the efficacy of both α-BS to neutralize key toxic compounds belonging to the predominant protein families of Bothrops snakes. Most significantly, both α-BS cross-specifically neutralized the main toxicological activities e.g. lethality and hemorrhage induced by these venoms. Thus, our data indicate that both α-BS are equally effective to treat snake bite victims inflicted by Bothrops snakes particularly B. atrox, responsible for the largest numbers of human envenomations in the Amazon regions of some South American countries including Peru and Brazil.
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Affiliation(s)
- Maria I Estevao-Costa
- Research and Development Center, Ezequiel Dias Foundation, 30510-010, Belo Horizonte, MG, Brazil
| | - Silea S Gontijo
- Research and Development Center, Ezequiel Dias Foundation, 30510-010, Belo Horizonte, MG, Brazil
| | - Barbara L Correia
- Research and Development Center, Ezequiel Dias Foundation, 30510-010, Belo Horizonte, MG, Brazil
| | - Armando Yarleque
- Laboratorio de Biologia Molecular, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Dan Vivas-Ruiz
- Laboratorio de Biologia Molecular, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Edith Rodrigues
- Laboratorio de Biologia Molecular, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Carlos Chávez-Olortegui
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Luciana S Oliveira
- Research and Development Center, Ezequiel Dias Foundation, 30510-010, Belo Horizonte, MG, Brazil
| | - Eladio F Sanchez
- Research and Development Center, Ezequiel Dias Foundation, 30510-010, Belo Horizonte, MG, Brazil; Laboratorio de Biologia Molecular, Universidad Nacional Mayor de San Marcos, Lima, Peru.
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de Souza RA, Díaz N, Nagem RAP, Ferreira RS, Suárez D. Unraveling the distinctive features of hemorrhagic and non-hemorrhagic snake venom metalloproteinases using molecular simulations. J Comput Aided Mol Des 2015; 30:69-83. [PMID: 26676823 DOI: 10.1007/s10822-015-9889-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 12/13/2015] [Indexed: 11/26/2022]
Abstract
Snake venom metalloproteinases are important toxins that play fundamental roles during envenomation. They share a structurally similar catalytic domain, but with diverse hemorrhagic capabilities. To understand the structural basis for this difference, we build and compare two dynamical models, one for the hemorrhagic atroxlysin-I from Bothrops atrox and the other for the non-hemorraghic leucurolysin-a from Bothrops leucurus. The analysis of the extended molecular dynamics simulations shows some changes in the local structure, flexibility and surface determinants that can contribute to explain the different hemorrhagic activity of the two enzymes. In agreement with previous results, the long Ω-loop (from residue 149 to 177) has a larger mobility in the hemorrhagic protein. In addition, we find some potentially-relevant differences at the base of the S1' pocket, what may be interesting for the structure-based design of new anti-venom agents. However, the sharpest differences in the computational models of atroxlysin-I and leucurolysin-a are observed in the surface electrostatic potential around the active site region, suggesting thus that the hemorrhagic versus non-hemorrhagic activity is probably determined by protein surface determinants.
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Affiliation(s)
- Raoni Almeida de Souza
- Depto de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Belo Horizonte, Minas Gerais, 3010-010, Brazil
| | - Natalia Díaz
- C/ Julián Clavería 8. Dpto. de Química Física y Analítica, Universidad de Oviedo, 33006, Oviedo, Asturias, Spain
| | - Ronaldo Alves Pinto Nagem
- Avenida Antônio Carlos 6627, Depto. de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Rafaela Salgado Ferreira
- Avenida Antônio Carlos 6627, Depto. de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Dimas Suárez
- C/ Julián Clavería 8. Dpto. de Química Física y Analítica, Universidad de Oviedo, 33006, Oviedo, Asturias, Spain.
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Abdel-Aty AM, Wahby AF. Purification and characterization of five snake venom metalloproteinases from Egyptian Echis pyramidum pyramidum venom. J Toxicol Sci 2015; 39:523-36. [PMID: 25056777 DOI: 10.2131/jts.39.523] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
New five P-III snake venom metalloproteinases (SVMPs): EpyB2 (62 kDa), EpyB3 (62+23 kDa), EpyB4 (60 kDa), EpyB5 (67 kDa) and EpyB6 (66 kDa) of the most dangerous viper, Echis pyramidum pyramidum (Epy), were purified and characterized in a set of biochemical assays. The SVMPs were purified by applying a protocol of two successive chromatographic steps. Three purified SVMPs "EpyB2, EpyB4, and EpyB5" have hemorrhagic activity with MHDs, 7 μg, 7.6 μg and 15 μg, respectively; furthermore, they have high preference towards fibronectin, collagen, gelatin, fibrin and hemoglobin substrates compared with non-hemorrhagic SVMPs (EpyB3 and EpyB6). All the purified SVMPs showed remarkable thermal and pH stability, inhibited by metalloproteinase inhibitors and Zn(2+), Mn(2+), Ni(2+), Co(2+), Cu(2+), and Hg(2+). The purified SVMPs act as α-fibrinogenases, prothrombin activators and procoagulants. In conclusion, Epy venom has multiple SVMPs that are responsible for hemorrhagic events and thus represent a significant health hazard for victims of envenomation, however, they may be useful for treating diseases involving abnormal blood clot formation.
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Abarema cochliacarpos extract decreases the inflammatory process and skeletal muscle injury induced by Bothrops leucurus venom. BIOMED RESEARCH INTERNATIONAL 2014; 2014:820761. [PMID: 25136627 PMCID: PMC4127289 DOI: 10.1155/2014/820761] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 04/20/2014] [Accepted: 05/11/2014] [Indexed: 12/18/2022]
Abstract
Snakebites are a public health problem, especially in tropical countries. However, treatment with antivenom has limited effectiveness against venoms' local effects. Here, we investigated the ability of Abarema cochliacarpos hydroethanolic extract (EAc) to protect mice against injection of Bothrops leucurus venom. Swiss mice received perimuscular venom injection and were subsequently treated orally with EAc in different doses. Treatment with EAc 100, 200, and 400 mg/kg reduced the edema induced by B. leucurus in 1%, 13%, and 39%, respectively. Although lower doses showed no antihypernociceptive effect in the Von Frey test, the higher dose significantly reduced hyperalgesia induced by the venom. Antimyotoxic activity of EAc was also observed by microscopy assessment, with treated muscles presenting preserved structures, decreased edema, and inflammatory infiltrate as compared to untreated ones. Finally, on the rotarod test, the treated mice showed better motor function, once muscle fibers were preserved and there were less edema and pain. Treated mice could stand four times more time on the rotating rod than untreated ones. Our results have shown that EAc presented relevant activities against injection of B. leucurus venom in mice, suggesting that it can be considered as an adjuvant in the treatment of envenomation.
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16
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Torres FS, Rates B, Gomes MTR, Salas CE, Pimenta AMC, Oliveira F, Santoro MM, de Lima ME. Bmoo FIBMP-I: A New Fibrinogenolytic Metalloproteinase from Bothrops moojeni Snake Venom. ISRN TOXICOLOGY 2012; 2012:673941. [PMID: 23762636 PMCID: PMC3671731 DOI: 10.5402/2012/673941] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 10/08/2012] [Indexed: 06/02/2023]
Abstract
A new fibrinogenolytic metalloproteinase (Bmoo FIBMP-I) was purified from Bothrops moojeni snake venom. This enzyme was isolated through a combination of three chromatographic steps (ion-exchange, molecular exclusion, and affinity chromatography). Analyses by reverse phase chromatography, followed by mass spectrometry, showed the presence of enzyme isoforms with average molecular mass of 22.8 kDa. The SDS-PAGE analyses showed a single chain of 27.6 kDa, in the presence and absence of reducing agent. The protein has a blocked N-terminal. One of the peptides obtained by enzymatic digestion of a reduced and S-alkylated isoform was completely sequenced by mass spectrometry (MS/MS). Bmoo FIBMP-I showed similarity with hemorrhagic factor and several metalloproteinases (MP). This enzyme degraded Aα-chain faster than the Bβ-chain and did not affect the γ-chain of bovine fibrinogen. The absence of proteolytic activity after treatment with EDTA, together with the observed molecular mass, led us to suggest that Bmoo FIBMP-I is a member of the P-I class of the snake venom MP family. Bmoo FIBMP-I showed pH-dependent proteolytic activity on azocasein, but was devoid of coagulant, defibrinating, or hemorrhagic activities. The kinetic parameters of proteolytic activity in azocasein were determined (V max = 0.4596 Uh(-1)nmol(-1) ± 0.1031 and K m = 14.59 mg/mL ± 4.610).
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Affiliation(s)
- F. S. Torres
- Laboratório de Venenos e Toxinas Animais, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - B. Rates
- Laboratório de Venenos e Toxinas Animais, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - M. T. R. Gomes
- Laboratório de Biologia Molecular de Produtos Naturais, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - C. E. Salas
- Laboratório de Biologia Molecular de Produtos Naturais, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - A. M. C. Pimenta
- Laboratório de Venenos e Toxinas Animais, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - F. Oliveira
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, 38400-902 Uberlândia, MG, Brazil
- Instituto Nacional de Ciência e Tecnologia em Nano-Biofarmacêutica (N-Biofar), Belo Horizonte, MG, Brazil
| | - M. M. Santoro
- Laboratório de Físico-Química de Proteínas e Enzimologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
| | - M. E. de Lima
- Laboratório de Venenos e Toxinas Animais, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
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de Morais ICO, Torres AFC, Pereira GJDS, Pereira TP, Pessoa Bezerra de Menezes RRDP, Mello CP, Coelho Jorge AR, Bindá AH, Toyama MH, Monteiro HSA, Smaili SS, Martins AMC. Bothrops leucurus venom induces nephrotoxicity in the isolated perfused kidney and cultured renal tubular epithelia. Toxicon 2012; 61:38-46. [PMID: 23127898 DOI: 10.1016/j.toxicon.2012.10.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Revised: 10/08/2012] [Accepted: 10/10/2012] [Indexed: 12/24/2022]
Abstract
Bites from snake (Bothrops genus) cause local tissue damage and systemic complications, which include alterations such as hemostatic system and acute renal failure (ARF). Recent studies suggest that ARF pathogenesis in snakebite envenomation is multifactorial and involves hemodynamic disturbances, immunologic reactions and direct nephrotoxicity. The aim of the work was to investigate the effects of the Bothrops leucurus venom (BlV) in the renal perfusion system and in cultured renal tubular cells of the type MDCK (Madin-Darby Canine kidney). BlV (10 μg/mL) reduced the perfusion pressure at 90 and 120 min. The renal vascular resistance (RVR) decreased at 120 min of perfusion. The effect on urinary flow (UF) and glomerular filtration rate (GFR) started 30 min after BlV infusion, was transient and returned to normal at 120 min of perfusion. It was also observed a decrease on percentual tubular transport of sodium (%TNa(+)) at 120 min and of chloride (%TCl(-)) at 60 and 90 min. The treatment with BlV caused decrease in cell viability to the lowest concentration tested with an IC(50) of 1.25 μg/mL. Flow cytometry with annexin V and propidium iodide showed that cell death occurred predominantly by necrosis. However, a cell death process may involve apoptosis in lower concentrations. BlV treatment (1.25 μg/mL) led to significant depolarization of the mitochondrial membrane potential and, indeed, we found an increase in the expression of cell death genes in the lower concentrations tested. The venom also evoked an increase in the cytosolic Ca(2+) in a concentration dependent manner, indicating that Ca(2+) may participate in the venom of B. leucurus effect. The characterization of the effects in the isolated kidney and renal tubular cells gives strong evidences that the acute renal failure induced by this venom is a result of the direct nephrotoxicity which may involve the cell death mechanism.
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Abstract
Recent proteomic analyses of snake venoms show that metalloproteinases represent major components in most of the Crotalid and Viperid venoms. In this chapter we discuss the multiple activities of the SVMPs. In addition to hemorrhagic activity, members of the SVMP family also have fibrin(ogen)olytic activity, act as prothrombin activators, activate blood coagulation factor X, possess apoptotic activity, inhibit platelet aggregation, are pro-inflammatory and inactivate blood serine proteinase inhibitors. Clearly the SVMPs have multiple functions in addition to their well-known hemorrhagic activity. The realization that there are structural variations in the SVMPs and the early studies that led to their classification represents an important event in our understanding of the structural forms of the SVMPs. The SVMPs were subdivided into the P-I, P-II and P-III protein classes. The noticeable characteristic that distinguished the different classes was their size (molecular weight) differences and domain structure: Class I (P-I), the small SVMPs, have molecular masses of 20-30 kDa, contain only a pro domain and the proteinase domain; Class II (P-II), the medium size SVMPs, molecular masses of 30-60 kDa, contain the pro domain, proteinase domain and disintegrin domain; Class III (P-III), the large SVMPs, have molecular masses of 60-100 kDa, contain pro, proteinase, disintegrin-like and cysteine-rich domain structure. Another significant advance in the SVMP field was the characterization of the crystal structure of the first P-I class SVMP. The structures of other P-I SVMPs soon followed and the structures of P-III SVMPs have also been determined. The active site of the metalloproteinase domain has a consensus HEXXHXXGXXHD sequence and a Met-turn. The "Met-turn" structure contains a conserved Met residue that forms a hydrophobic basement for the three zinc-binding histidines in the consensus sequence.
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Affiliation(s)
- Francis S Markland
- University of Southern California, Keck School of Medicine, Cancer Research Laboratory #106, 1303 N. Mission Rd., Los Angeles, CA 90033, USA.
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Wahby A, Abdel-Aty AM, El-Kady E. Purification of hemorrhagic SVMPs from venoms of three vipers of Egypt. Toxicon 2012; 59:329-37. [DOI: 10.1016/j.toxicon.2011.11.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2011] [Revised: 11/10/2011] [Accepted: 11/17/2011] [Indexed: 11/26/2022]
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Kohlhoff M, Borges MH, Yarleque A, Cabezas C, Richardson M, Sanchez EF. Exploring the proteomes of the venoms of the Peruvian pit vipers Bothrops atrox, B. barnetti and B. pictus. J Proteomics 2012; 75:2181-95. [PMID: 22300577 DOI: 10.1016/j.jprot.2012.01.020] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 01/12/2012] [Accepted: 01/16/2012] [Indexed: 10/14/2022]
Abstract
We report the comparative proteomic characterization of the venoms of Bothrops atrox, B. barnetti and B. pictus. The venoms were subjected to RP-HPLC and the resulting fractions analyzed by SDS-PAGE. The proteins were cut from the gels, digested with trypsin and identified via peptide mass fingerprint and manual sequencing of selected peptides by MALDI-TOF/TOF mass spectrometry. Around 20-25 proteins were identified belonging to only 6-7 protein families. Metalloproteinases of the classes P-I and P-III were the most abundant proteins in all venoms (58-74% based on peak area A214 nm), followed by phospholipases-A(2) (6.4-14%), disintegrins (3.2-9%) and serine proteinases (7-11%), and some of these proteins occurred in several isoforms. In contrast cysteine-rich secretory proteins and L-amino acid oxidases appeared only as single isoforms and were found only in B. atrox and B. barnetti. C-type lectins were also detected in all venoms but at low levels (~ 5%). Furthermore, the venoms contain variable numbers of peptides (<3 kDa) and non-protein compounds which were not considered in this work. The protein composition of the investigated Bothrops species is in agreement with their pharmacological and pathological effects.
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Affiliation(s)
- Markus Kohlhoff
- Research and Development Center, Ezequiel Dias Foundation, 30510-010, Belo Horizonte, Brazil
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Gabriel LM, Sanchez EF, Silva SG, Santos RG. Tumor cytotoxicity of leucurolysin-B, a P-III snake venom metalloproteinase from Bothrops leucurus. J Venom Anim Toxins Incl Trop Dis 2012. [DOI: 10.1590/s1678-91992012000100004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- LM Gabriel
- Center for Development of Nuclear Technology, Brazil
| | | | - SG Silva
- Ezequiel Dias Foundation, Brazil
| | - RG Santos
- Center for Development of Nuclear Technology, Brazil; Brazil National Institute, Brazil
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Higuchi DA, Almeida MC, Barros CC, Sanchez EF, Pesquero PR, Lang EAS, Samaan M, Araujo RC, Pesquero JB, Pesquero JL. Leucurogin, a new recombinant disintegrin cloned from Bothrops leucurus (white-tailed-jararaca) with potent activity upon platelet aggregation and tumor growth. Toxicon 2011; 58:123-9. [PMID: 21641921 DOI: 10.1016/j.toxicon.2011.05.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 05/17/2011] [Accepted: 05/17/2011] [Indexed: 10/18/2022]
Abstract
Disintegrins and disintegrins-like proteins are able to inhibit platelet aggregation and integrin-mediated cell adhesion. The aim of this study was to produce one disintegrin-like cloned from Bothrops leucurus venom gland and to characterize it regarding biological activity. The recombinant protein was purified by one step procedure involving anion-exchange chromatography (DEAE-cellulose) and presented a molecular mass of 10.4 kDa. The purified protein was able to inhibit platelet aggregation induced by collagen (IC₅₀ = 0.65 μM) and to inhibit growth of Ehrlich tumor implanted in mice by more than 50% after 7 days administration of 10 μg/day. No effects were observed upon adenosine 5'-diphosphate (ADP)-and arachidonic acid (AA)-induced platelet aggregation. The recombinant protein was recognized by an antibody specific for jararhagin one metalloproteinase isolated from Bothrops jararaca venom, and therefore it was named leucurogin. Anti-angiogenesis effect of leucurogin was evaluated by the sponge implant model. After 7 days administration leucurogin inhibited, in a dose dependent way, the vascularization process in the sponge. Leucurogin represents a new biotechnological tool to understand biological processes where disintegrins-like are involved and may help to characterize integrins that can be involved in development and progression of malignant cells.
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Affiliation(s)
- D A Higuchi
- Universidade de Mogi das Cruzes, Av. Dr Cândido Xavier de Almeida e Souza 200, Centro Cívico, 08780-911 Mogi das Cruzes, São Paulo, Brazil
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Naumann GB, Silva LF, Silva L, Faria G, Richardson M, Evangelista K, Kohlhoff M, Gontijo CM, Navdaev A, de Rezende FF, Eble JA, Sanchez EF. Cytotoxicity and inhibition of platelet aggregation caused by an l-amino acid oxidase from Bothrops leucurus venom. Biochim Biophys Acta Gen Subj 2011; 1810:683-94. [DOI: 10.1016/j.bbagen.2011.04.003] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 03/20/2011] [Accepted: 04/14/2011] [Indexed: 12/09/2022]
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Nunes EDS, de Souza MAA, Vaz AFDM, Santana GMDS, Gomes FS, Coelho LCBB, Paiva PMG, da Silva RML, Silva-Lucca RA, Oliva MLV, Guarnieri MC, Correia MTDS. Purification of a lectin with antibacterial activity from Bothrops leucurus snake venom. Comp Biochem Physiol B Biochem Mol Biol 2011; 159:57-63. [DOI: 10.1016/j.cbpb.2011.02.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 02/07/2011] [Accepted: 02/14/2011] [Indexed: 10/18/2022]
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Trevisan-Silva D, Gremski LH, Chaim OM, da Silveira RB, Meissner GO, Mangili OC, Barbaro KC, Gremski W, Veiga SS, Senff-Ribeiro A. Astacin-like metalloproteases are a gene family of toxins present in the venom of different species of the brown spider (genus Loxosceles). Biochimie 2009; 92:21-32. [PMID: 19879318 DOI: 10.1016/j.biochi.2009.10.003] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Accepted: 10/06/2009] [Indexed: 10/20/2022]
Abstract
Brown spiders have a worldwide distribution, and their venom has a complex composition containing many different molecules. Herein, we report the existence of a family of astacin-like metalloprotease toxins in Loxosceles intermedia venom, as well as in the venom of different species of Loxosceles. Using a cDNA library from the L. intermedia venom gland, we cloned two novel cDNAs encoding astacin-like metalloprotease toxins, LALP2 and LALP3. Using an anti-serum against the previously described astacin-like toxin in L. intermedia venom (LALP1), we detected the presence of immunologically-related toxins in the venoms of L. intermedia, Loxosceles laeta, and Loxosceles gaucho. Zymographic experiments showed gelatinolytic activity of crude venoms of L. intermedia, L. laeta, and L. gaucho (which could be inhibited by the divalent metal chelator 1,10-phenanthroline) at electrophoretic mobilities identical to those reported for immunological cross-reactivity. Moreover, mRNAs extracted from L. laeta and L. gaucho venom glands were screened for astacin-like metalloproteases, and cDNAs obtained using LALP1-specific primers were sequenced, and their deduced amino acid sequences confirmed they were members of the astacin family with the family signatures (HEXXHXXGXXHE and MXY), LALP4 and LALP5, respectively. Sequence comparison of deduced amino acid sequences revealed that LALP2, LALP3, LALP4, and LALP5 are related to the astacin family. This study identified the existence of gene family of astacin-like toxins in the venoms of brown spiders and raises the possibility that these molecules are involved in the deleterious effects triggered by the venom.
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Jia Y, Pérez JC. Molecular cloning and characterization of cDNAs encoding metalloproteinases from snake venom glands. Toxicon 2009; 55:462-9. [PMID: 19799929 DOI: 10.1016/j.toxicon.2009.09.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 09/19/2009] [Accepted: 09/22/2009] [Indexed: 10/20/2022]
Abstract
Snake venom metalloproteinases (SVMPs) are a superfamily of zinc-dependent proteases and participate in a number of important biological, physiological and pathophysiological processes. In this work, we simultaneously amplified nine cDNAs encoding different classes of metalloproteinases from glands of four different snake species (Agkistrodon contortrix laticinctus, Crotalus atrox, Crotalus viridis viridis and Agkistrodon piscivorus leucostoma) by RT-PCR with a pair of primers. Among the encoded metalloproteinases, two enzymes (AclVMP-I and AplVMP-I), three enzymes (CaVMP-II, CvvVMP-II and AplVMP-II) and four enzymes (AclVMP-III, CaVMP-III, CvvVMP-III and AplVMP-III) with the characteristic motif (HEXXHXXGXXH) of metalloproteinase belong to type P-I, P-II and P-III enzymes, respectively. Disintegrin domains of CaVMP-II and CvvVMP-II from two Crotatus snakes contain RGD-motif whereas AplVMP-II from Agkistrodon snake has KGD-motif. Instead of R/KGD-motif within disintegrin domain of SVMP-II enzyme, CaVMP-III, CvvVMP-III and AplVMP-III enzymes contain SECD-motif, while AclVMP-III has DDCD-motif in their corresponding position of disintegrin-like domains. There are 12 Cys amino acids in cysterin-rich domains of each P-III enzyme. Moreover, a disintegrin precursor (AplDis) with RGD-motif also simultaneously amplified from the glands of A.p. leucostoma while amplifying AplVMP-II and AplVMP-III, which indicated that different types of SVMPs and related genes are present in a single species of snake and share a consensus sequence at the 3' and 5' untranslated regions. RT-PCR result also showed that P-III is highly expressed in Crotalus snakes than in Agkistrodon snakes. Aligning the deduced amino acid sequence of these enzymes with other SVMPs from GenBank database indicated that this is the first report on the isolation of cDNAs encoding P-II and P-III enzymes from C.v. viridis and A.p. leucostoma snakes. The availability of these SVMP sequences directly facilitated further studies of structure characterization and diversified function analysis.
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Affiliation(s)
- Ying Jia
- Natural Toxins Research Center, College of Arts and Sciences, Texas A & M University-Kingsville, Kingsville, TX 78363, USA
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Agero U, Arantes RME, Lacerda-Queiroz N, Mesquita ON, Magalhães A, Sanchez EF, Carvalho-Tavares J. Effect of mutalysin II on vascular recanalization after thrombosis induction in the ear of the hairless mice model. Toxicon 2007; 50:698-706. [PMID: 17681580 DOI: 10.1016/j.toxicon.2007.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2007] [Revised: 06/01/2007] [Accepted: 06/04/2007] [Indexed: 10/23/2022]
Abstract
Mutalysin II (mut-II) is an alpha-fibrinogenase isolated from Lachesis muta muta (bushmaster) snake venom. The enzyme lyses fibrin clots in vitro, and this activity does not depend on plasminogen activation. The aim of this study was to assess by intravital microscopy the effect of Mutalysin II on the recanalization of microvessels after thrombus induction in the ears of hairless mice. Photochemical thrombus formation was induced after i.v. injection of 5% fluorescein isothiocyanate labelled dextran (FITC-dextran) followed by mercury light exposure of individual microvessels of the ear of five anesthetized animals. Video playback analysis of intravital microscopy images of the ear microcirculation permitted us to measure blood flow velocity (microm/s) under control conditions (before thrombus formation) in the ear microvessels. Thirty minutes after thrombus formation (blood flow velocity stopped completely), each animal (n=5) was infused with Mutalysin II (2.0 mg/kg, i.v.). All animals treated with Mutalysin II showed evident thrombolysis after approximately 12 min, followed by recanalization. A separate group of mice (n=5) which received urokinase type-plasminogen activator (u-PA, 250 U/mouse, i.v.) showed blood flow restoration within the same interval (12 min). These in vivo data suggest that Mutalysin II has the potential to be an effective thrombolytic agent.
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Affiliation(s)
- Ubirajara Agero
- Departamento de Física, Instituto de Ciência Exatas Universidade Federal de Minas Gerais, Brazil
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