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AlShammari AK, Abd El-Aziz TM, Al-Sabi A. Snake Venom: A Promising Source of Neurotoxins Targeting Voltage-Gated Potassium Channels. Toxins (Basel) 2023; 16:12. [PMID: 38251229 PMCID: PMC10820993 DOI: 10.3390/toxins16010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/11/2023] [Accepted: 12/19/2023] [Indexed: 01/23/2024] Open
Abstract
The venom derived from various sources of snakes represents a vast collection of predominantly protein-based toxins that exhibit a wide range of biological actions, including but not limited to inflammation, pain, cytotoxicity, cardiotoxicity, and neurotoxicity. The venom of a particular snake species is composed of several toxins, while the venoms of around 600 venomous snake species collectively encompass a substantial reservoir of pharmacologically intriguing compounds. Despite extensive research efforts, a significant portion of snake venoms remains uncharacterized. Recent findings have demonstrated the potential application of neurotoxins derived from snake venom in selectively targeting voltage-gated potassium channels (Kv). These neurotoxins include BPTI-Kunitz polypeptides, PLA2 neurotoxins, CRISPs, SVSPs, and various others. This study provides a comprehensive analysis of the existing literature on the significance of Kv channels in various tissues, highlighting their crucial role as proteins susceptible to modulation by diverse snake venoms. These toxins have demonstrated potential as valuable pharmacological resources and research tools for investigating the structural and functional characteristics of Kv channels.
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Affiliation(s)
- Altaf K. AlShammari
- College of Engineering and Technology, American University of the Middle East, Egaila 54200, Kuwait;
| | - Tarek Mohamed Abd El-Aziz
- Zoology Department, Faculty of Science, Minia University, El-Minia 61519, Egypt
- Department of Cellular and Integrative Physiology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Ahmed Al-Sabi
- College of Engineering and Technology, American University of the Middle East, Egaila 54200, Kuwait;
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2
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Lodato M, Plaisance V, Pawlowski V, Kwapich M, Barras A, Buissart E, Dalle S, Szunerits S, Vicogne J, Boukherroub R, Abderrahmani A. Venom Peptides, Polyphenols and Alkaloids: Are They the Next Antidiabetics That Will Preserve β-Cell Mass and Function in Type 2 Diabetes? Cells 2023; 12:cells12060940. [PMID: 36980281 PMCID: PMC10047094 DOI: 10.3390/cells12060940] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/09/2023] [Accepted: 03/17/2023] [Indexed: 03/22/2023] Open
Abstract
Improvement of insulin secretion by pancreatic β-cells and preservation of their mass are the current challenges that future antidiabetic drugs should meet for achieving efficient and long-term glycemic control in patients with type 2 diabetes (T2D). The successful development of glucagon-like peptide 1 (GLP-1) analogues, derived from the saliva of a lizard from the Helodermatidae family, has provided the proof of concept that antidiabetic drugs directly targeting pancreatic β-cells can emerge from venomous animals. The literature reporting on the antidiabetic effects of medicinal plants suggests that they contain some promising active substances such as polyphenols and alkaloids, which could be active as insulin secretagogues and β-cell protectors. In this review, we discuss the potential of several polyphenols, alkaloids and venom peptides from snake, frogs, scorpions and cone snails. These molecules could contribute to the development of new efficient antidiabetic medicines targeting β-cells, which would tackle the progression of the disease.
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Affiliation(s)
- Michele Lodato
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
| | - Valérie Plaisance
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
| | - Valérie Pawlowski
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
| | - Maxime Kwapich
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
- Service de Diabétologie et d’Endocrinologie, CH Dunkerque, 59385 Dunkirk, France
| | - Alexandre Barras
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
| | - Emeline Buissart
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
| | - Stéphane Dalle
- Institut de Génomique Fonctionnelle, Université de Montpellier, CNRS, INSERM, 34094 Montpellier, France
| | - Sabine Szunerits
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
| | - Jérôme Vicogne
- University Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019-UMR 9017-CIIL-Center for Infection and Immunity of Lille, F-59000 Lille, France
| | - Rabah Boukherroub
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
| | - Amar Abderrahmani
- University Lille, CNRS, Centrale Lille, University Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France
- Correspondence: ; Tel.: +33-362531704
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Rodríguez-Vargas A, Vega N, Reyes-Montaño E, Corzo G, Neri-Castro E, Clement H, Ruiz-Gómez F. Intraspecific Differences in the Venom of Crotalus durissus cumanensis from Colombia. Toxins (Basel) 2022; 14:toxins14080532. [PMID: 36006194 PMCID: PMC9416679 DOI: 10.3390/toxins14080532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/12/2022] [Accepted: 07/14/2022] [Indexed: 12/04/2022] Open
Abstract
Biochemical and biological differences in the venom of Crotalus durissus cumanensis from three ecoregions of Colombia were evaluated. Rattlesnakes were collected from the geographic areas of Magdalena Medio (MM), Caribe (CA) and Orinoquía (OR). All three regionally distributed venoms contain proteases, PLA2s and the basic subunit of crotoxin. However, only crotamine was detected in the CA venom. The highest lethality, coagulant, phospholipase A2 and hyaluronidase activities were found in the MM venom. Also, some differences, observed by western blot and immunoaffinity, were found in all three venoms when using commercial antivenoms. Furthermore, all three eco-regional venoms showed intraspecific variability, considering the differences in the abundance and intensity of their components, in addition to the activity and response to commercial antivenoms.
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Affiliation(s)
- Ariadna Rodríguez-Vargas
- Grupo de Investigación en Proteínas, Universidad Nacional de Colombia, Bogotá 11001, Colombia; (N.V.); (E.R.-M.)
- Correspondence:
| | - Nohora Vega
- Grupo de Investigación en Proteínas, Universidad Nacional de Colombia, Bogotá 11001, Colombia; (N.V.); (E.R.-M.)
| | - Edgar Reyes-Montaño
- Grupo de Investigación en Proteínas, Universidad Nacional de Colombia, Bogotá 11001, Colombia; (N.V.); (E.R.-M.)
| | - Gerardo Corzo
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; (G.C.); (E.N.-C.); (H.C.)
| | - Edgar Neri-Castro
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; (G.C.); (E.N.-C.); (H.C.)
| | - Herlinda Clement
- Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca 62210, Mexico; (G.C.); (E.N.-C.); (H.C.)
| | - Francisco Ruiz-Gómez
- Grupo de Investigación en Animales Ponzoñosos y sus Venenos, Instituto Nacional de Salud, Bogotá 111321, Colombia;
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Purification and Characterization of a Novel Factor of Crotoxin Inter-CRO (V-1), a New Phospholipase A2 Isoform from Crotalus durissus collilineatus Snake Venom Using an In Vitro Neuromuscular Preparation. Processes (Basel) 2022. [DOI: 10.3390/pr10071428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The fractionation of Crotalus durissus collilineatus whole venom through an HPLC chromatographic method enabled the purification of a new V-1 neurotoxin. Inter-CRO (V-1) presents similarity in its primary structure to crotoxin B (CB), suggesting another isoform of this toxin. The aim of this study was to compare V-1 to the crotoxin complex (CA/CB) and CB to elucidate aspects related to its functionality. The homogeneity of the purified protein was confirmed with a molecular mass of 1425.45 Da, further verified by mass spectrometry. The sequence of the protein showed high similarity to other viperid snake venom PLA2 proteins. The results of this study report that V-1 is an uncharacterized novel toxin with different biological activities from CB. V-1 maintained catalytic activity but presented neurotoxic activity as observed by the 2.5-fold increase in twitch tension record compared to control values on isolated muscle cells.
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Joshi R, Sweidan K, Jha D, Kerkis I, Scheffler K, Engelmann J. Evaluation of crotamine based probes as intracellular targeted contrast agents for magnetic resonance imaging. Bioorg Med Chem 2022; 69:116863. [PMID: 35752142 DOI: 10.1016/j.bmc.2022.116863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 11/02/2022]
Abstract
Crotamine is a lysine and cysteine rich 42 amino acids long bio-active polypeptide, isolated from the venom of a South American rattlesnake, that can also be used as cell penetrating peptide. A facile synthetic scheme for coupling cargo molecules like fluorophores (carboxyfluorescein) or MRI probes (Gd-DO3A-based macrocycle) is presented. The toxicity, cellular internalization and steady-state accumulation after long-term incubation for 18 h, as well as magnetic resonance relaxivities and cellular relaxation rates of crotamine based probes were evaluated and compared to its shorter synthetic fragment CyLoP-1. The longitudinal relaxivity (r1) of the conjugates of CyLoP-1 and crotamine is significantly lower in medium than in water indicating to the lower contrast enhancement efficacy of DO3A-based probes in biological samples. Carboxyfluorescein labeled crotamine did not exhibit toxicity up to a concentration of 2.5 µM. CyLoP-1 accumulated about four times better within the cells compared to crotamine. Fluorescence microscopy suggests different predominant uptake mechanisms for crotamine and CyLoP-1 in 3T3 cells. While crotamine is predominantly localized in vesicular structures (most likely endosomes and lysosomes) within the cell, CyLoP-1 is mainly homogeneously distributed in the cytosol. The cellular relaxation rate (R1, cell) of the crotamine based probe was not significantly increased whereas the corresponding CyLoP-1-derivative showed a slightly elevated R1, cell. This study indicates the potential of crotamine and in particular the shorter fragment CyLoP-1 to be useful for an efficient transmembrane delivery of agents directed to intracellular (cytosolic) targets. However, the applicability of the conjugates synthesized here as contrast agents in MR imaging is limited. Further improvement is needed to prepare more efficient probes for MRI applications, i.e., by replacing the DO3A- with a DOTA-based chelate.
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Affiliation(s)
- Rajendra Joshi
- Department of Chemical Science and Engineering, School of Engineering, Kathmandu University, Dhulikhel, Nepal.
| | - Kamal Sweidan
- Department of Chemistry, The University of Jordan, Amman 11942, Jordan
| | - Deepti Jha
- High-Field MR Center, Max Planck Institute for Biological Cybernetics, Tübingen, Germany
| | - Irina Kerkis
- Laboratory of Genetics Butantan Institute São Paulo, Brazil
| | - Klaus Scheffler
- High-Field MR Center, Max Planck Institute for Biological Cybernetics, Tübingen, Germany; Department of Biomedical Magnetic Resonance, University of Tübingen, Germany
| | - Joern Engelmann
- High-Field MR Center, Max Planck Institute for Biological Cybernetics, Tübingen, Germany
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Pompeia C, Frare EO, Peigneur S, Tytgat J, da Silva ÁP, de Oliveira EB, Pereira A, Kerkis I, Kolonin MG. Synthetic polypeptide crotamine: characterization as a myotoxin and as a target of combinatorial peptides. J Mol Med (Berl) 2022; 100:65-76. [PMID: 34643765 DOI: 10.1007/s00109-021-02140-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 08/23/2021] [Accepted: 09/08/2021] [Indexed: 10/20/2022]
Abstract
Crotamine is a rattlesnake-derived toxin that causes fast-twitch muscle paralysis. As a cell-penetrating polypeptide, crotamine has been investigated as an experimental anti-cancer and immunotherapeutic agent. We hypothesized that molecules targeting crotamine could be designed to study its function and intervene in its adverse activities. Here, we characterize synthetic crotamine and show that, like the venom-purified toxin, it induces hindlimb muscle paralysis by affecting muscle contraction and inhibits KCNA3 (Kv1.3) channels. Synthetic crotamine, labeled with a fluorophore, displayed cell penetration, subcellular myofiber distribution, ability to induce myonecrosis, and bind to DNA and heparin. Here, we used this functionally validated synthetic polypeptide to screen a combinatorial phage display library for crotamine-binding cyclic peptides. Selection for tryptophan-rich peptides was observed, binding of which to crotamine was confirmed by ELISA and gel shift assays. One of the peptides (CVWSFWGMYC), synthesized chemically, was shown to bind both synthetic and natural crotamine and to block crotamine-DNA binding. In summary, our study establishes a functional synthetic substitute to the venom-derived toxin and identifies peptides that could further be developed as probes to target crotamine. KEY MESSAGES: Synthetic crotamine was characterized as a functional substitute for venom-derived crotamine based on myotoxic effects. A combinatorial peptide library was screened for crotamine-binding peptides. Tryptophan-rich peptides were shown to bind to crotamine and interfere with its DNA binding. Crotamine myofiber distribution and affinity for tryptophan-rich peptides provide insights on its mechanism of action.
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Affiliation(s)
- Celine Pompeia
- Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX, USA
- Genetics Laboratory, Instituto Butantan, São Paulo, SP, Brazil
- Currently an Independent Researcher, São Paulo, SP, Brazil
| | | | - Steve Peigneur
- Toxicology and Pharmacology, University of Leuven (KU Leuven), Leuven, Belgium
| | - Jan Tytgat
- Toxicology and Pharmacology, University of Leuven (KU Leuven), Leuven, Belgium
| | | | | | | | - Irina Kerkis
- Genetics Laboratory, Instituto Butantan, São Paulo, SP, Brazil
| | - Mikhail G Kolonin
- Institute of Molecular Medicine, University of Texas Health Science Center, Houston, TX, USA
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Franco-Servín C, Neri-Castro E, Bénard-Valle M, Alagón A, Rosales-García RA, Guerrero-Alba R, Poblano-Sánchez JE, Silva-Briano M, Guerrero-Barrera AL, Sigala-Rodríguez JJ. Biological and Biochemical Characterization of Coronado Island Rattlesnake ( Crotalus helleri caliginis) Venom and Antivenom Neutralization. Toxins (Basel) 2021; 13:toxins13080582. [PMID: 34437453 PMCID: PMC8402616 DOI: 10.3390/toxins13080582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 08/05/2021] [Accepted: 08/11/2021] [Indexed: 01/18/2023] Open
Abstract
The Baja California Peninsula has over 250 islands and islets with many endemic species. Among them, rattlesnakes are the most numerous but also one of the least studied groups. The study of island rattlesnake venom could guide us to a better understanding of evolutionary processes and the description of novel toxins. Crotalus helleri caliginis venom samples were analyzed to determine possible ontogenetic variation with SDS-PAGE in one and two dimensions and with RP-HPLC. Western Blot, ELISA, and amino-terminal sequencing were used to determine the main components of the venom. The biological and biochemical activities demonstrate the similarity of C. helleri caliginis venom to the continental species C. helleri helleri, with both having low proteolytic and phospholipase A2 (PLA2) activity but differing due to the absence of neurotoxin (crotoxin-like) in the insular species. The main components of the snake venom were metalloproteases, serine proteases, and crotamine, which was the most abundant toxin group (30–35% of full venom). The crotamine was isolated using size-exclusion chromatography where its functional effects were tested on mouse phrenic nerve–hemidiaphragm preparations in which a significant reduction in muscle twitch contractions were observed. The two Mexican antivenoms could neutralize the lethality of C. helleri caliginis venom but not the crotamine effects.
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Affiliation(s)
- Cristian Franco-Servín
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Aguascalientes CP 20131, Ags, Mexico;
- Colección Zoológica, Departamento de Biología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Aguascalientes CP 20131, Ags, Mexico;
| | - Edgar Neri-Castro
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad # 2001 Colonia Chamilpa, Cuernavaca CP 62210, Morelos, Mexico; (E.N.-C.); (M.B.-V.); (A.A.)
| | - Melisa Bénard-Valle
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad # 2001 Colonia Chamilpa, Cuernavaca CP 62210, Morelos, Mexico; (E.N.-C.); (M.B.-V.); (A.A.)
| | - Alejandro Alagón
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad # 2001 Colonia Chamilpa, Cuernavaca CP 62210, Morelos, Mexico; (E.N.-C.); (M.B.-V.); (A.A.)
| | - Ramsés Alejandro Rosales-García
- Colección Zoológica, Departamento de Biología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Aguascalientes CP 20131, Ags, Mexico;
| | - Raquel Guerrero-Alba
- Laboratorio de Electrofisiología, Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Aguascalientes CP 20131, Ags, Mexico;
| | - José Emanuel Poblano-Sánchez
- Laboratorio Clínico de Especialidades del Hospital General ISSSTE, Av. Universidad 410, Aguascalientes CP 20010, Ags, Mexico;
| | - Marcelo Silva-Briano
- Laboratorio de Ecología, Departamento de Biología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Aguascalientes CP 20131, Ags, Mexico;
| | - Alma Lilián Guerrero-Barrera
- Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Aguascalientes CP 20131, Ags, Mexico;
- Correspondence: (A.L.G.-B.); (J.J.S.-R.)
| | - José Jesús Sigala-Rodríguez
- Colección Zoológica, Departamento de Biología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Av. Universidad 940, Aguascalientes CP 20131, Ags, Mexico;
- Correspondence: (A.L.G.-B.); (J.J.S.-R.)
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8
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Moreira LA, Oliveira LP, Magalhães MR, Oliveira SAM, Oliveira-Neto JR, Carvalho PMG, Carvalho AAV, Fajemiroye JO, Cruz AC, Cunha LC. Acute toxicity, antinociceptive, and anti-inflammatory activities of the orally administered crotamine in mice. Naunyn Schmiedebergs Arch Pharmacol 2021; 394:1703-1711. [PMID: 34014349 DOI: 10.1007/s00210-021-02103-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 05/11/2021] [Indexed: 11/26/2022]
Abstract
Crotamine is a polypeptide toxin isolated from rattlesnake venom. Although several studies have been developed identifying many biological effects of isolated crotamine, none of them evaluated its acute toxicity, antinociceptive, and anti-inflammatory activities through oral administration. All in vivo experiments from this study were performed in mice. The up-and-down procedure and hippocratic screening were carried out to evaluate possible pharmacological and toxic effects. Antinociceptive and anti-inflammatory activities of this toxin were evaluated using acetic acid-induced abdominal writhing, formalin-induced pain assays, croton oil-induced ear edema, and carrageenan-induced pleurisy. Crotamine did not cause lethality or signs of intoxication up to the maximum dose tested (10.88 mg/kg). The number of contortions was reduced significantly by 34, 57, and 74% at the oral doses of 0.08, 0.16, and 0.32 mg/kg, respectively. At the dose of 0.16 mg/kg, crotamine decreases pain time-reactivity at neurogenic phase by 45% and at inflammatory phase by 60%. Also, crotamine elicited antiedematogenic activity through the attenuation of the croton oil-induced ear edema by 77%. In the carrageenan-induced pleurisy, the leukocyte, neutrophil, and mononuclear cell migration to the lesion site were reduced by 52%, 46%, and 59%, respectively. Altogether, crotamine demonstrated in vivo antinociceptive and anti-inflammatory effect through acute oral administration, generating an anti-migratory mechanism of action at non-toxic doses.
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Affiliation(s)
- Lorena A Moreira
- Núcleo de Estudos E Pesquisas Tóxico-Farmacológicas, Faculdade de Farmácia, Universidade Federal de Goiás, Av. Universitária no. 1166 - Setor Leste Universitário, Goiânia, GO, 74605-010, Brazil
| | - Lanussy P Oliveira
- Núcleo de Estudos E Pesquisas Tóxico-Farmacológicas, Faculdade de Farmácia, Universidade Federal de Goiás, Av. Universitária no. 1166 - Setor Leste Universitário, Goiânia, GO, 74605-010, Brazil
| | - Marta R Magalhães
- Departamento de Biologia, Centro de Estudos E Pesquisas Biológicas, Pontifícia Universidade Católica de Goiás, Goiânia, GO, Brazil
| | - Sayonara A M Oliveira
- Núcleo de Estudos E Pesquisas Tóxico-Farmacológicas, Faculdade de Farmácia, Universidade Federal de Goiás, Av. Universitária no. 1166 - Setor Leste Universitário, Goiânia, GO, 74605-010, Brazil
- Departamento de Biologia, Centro de Estudos E Pesquisas Biológicas, Pontifícia Universidade Católica de Goiás, Goiânia, GO, Brazil
| | - Jerônimo R Oliveira-Neto
- Núcleo de Estudos E Pesquisas Tóxico-Farmacológicas, Faculdade de Farmácia, Universidade Federal de Goiás, Av. Universitária no. 1166 - Setor Leste Universitário, Goiânia, GO, 74605-010, Brazil
| | | | | | - James O Fajemiroye
- Departamento de Farmacologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Alessandro C Cruz
- Núcleo de Estudos E Pesquisas Tóxico-Farmacológicas, Faculdade de Farmácia, Universidade Federal de Goiás, Av. Universitária no. 1166 - Setor Leste Universitário, Goiânia, GO, 74605-010, Brazil.
| | - Luiz C Cunha
- Núcleo de Estudos E Pesquisas Tóxico-Farmacológicas, Faculdade de Farmácia, Universidade Federal de Goiás, Av. Universitária no. 1166 - Setor Leste Universitário, Goiânia, GO, 74605-010, Brazil
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9
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Salazar E, Rodriguez-Acosta A, Lucena S, Gonzalez R, McLarty MC, Sanchez O, Suntravat M, Garcia E, Finol HJ, Giron ME, Fernandez I, Deba F, Bessac BF, Sánchez EE. Biological activities of a new crotamine-like peptide from Crotalus oreganus helleri on C2C12 and CHO cell lines, and ultrastructural changes on motor endplate and striated muscle. Toxicon 2020; 188:95-107. [PMID: 33065200 PMCID: PMC7720416 DOI: 10.1016/j.toxicon.2020.10.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 09/05/2020] [Accepted: 10/11/2020] [Indexed: 01/08/2023]
Abstract
Crotamine and crotamine-like peptides are non-enzymatic polypeptides, belonging to the family of myotoxins, which are found in high concentration in the venom of the Crotalus genus. Helleramine was isolated and purified from the venom of the Southern Pacific rattlesnake, Crotalus oreganus helleri. This peptide had a similar, but unique, identity to crotamine and crotamine-like proteins isolated from other rattlesnakes species. The variability of crotamine-like protein amino acid sequences may allow different toxic effects on biological targets or optimize the action against the same target of different prey. Helleramine was capable of increasing intracellular Ca2+ in Chinese Hamster Ovary (CHO) cell line. It inhibited cell migration as well as cell viability (IC50 = 11.44 μM) of C2C12, immortalized skeletal myoblasts, in a concentration dependent manner, and promoted early apoptosis and cell death under our experimental conditions. Skeletal muscle harvested from mice 24 h after helleramine injection showed contracted myofibrils and profound vacuolization that enlarged the subsarcolemmal space, along with loss of plasmatic and basal membrane integrity. The effects of helleramine provide further insights and evidence of myotoxic activities of crotamine-like peptides and their possible role in crotalid envenomings.
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Affiliation(s)
- Emelyn Salazar
- National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, Kingsville, TX, USA
| | - Alexis Rodriguez-Acosta
- Laboratorio de Inmunoquímica y Ultraestructura, Instituto Anatómico, Universidad Central de Venezuela, Caracas, Venezuela
| | - Sara Lucena
- National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, Kingsville, TX, USA
| | - Roschman Gonzalez
- Centro de Microscopía Electrónica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela
| | - Morgan C McLarty
- National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, Kingsville, TX, USA
| | - Oscar Sanchez
- National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, Kingsville, TX, USA
| | - Montamas Suntravat
- National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, Kingsville, TX, USA
| | - Estefanie Garcia
- Centro de Microscopía Electrónica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela
| | - Hector J Finol
- Centro de Microscopía Electrónica, Facultad de Ciencias, Universidad Central de Venezuela, Caracas, Venezuela
| | - Maria E Giron
- Laboratorio de Inmunoquímica y Ultraestructura, Instituto Anatómico, Universidad Central de Venezuela, Caracas, Venezuela
| | - Irma Fernandez
- Laboratorio de Inmunoquímica y Ultraestructura, Instituto Anatómico, Universidad Central de Venezuela, Caracas, Venezuela
| | - Farah Deba
- Texas A&M Rangel College of Pharmacy, Kingsville, TX, USA
| | - Bret F Bessac
- Texas A&M Rangel College of Pharmacy, Kingsville, TX, USA; Jerry H. Hodge School of Pharmacy, Texas Tech University HSC, Amarillo, TX, USA
| | - Elda E Sánchez
- National Natural Toxins Research Center (NNTRC), Texas A&M University-Kingsville, Kingsville, TX, USA; Department of Chemistry, Texas A&M University-Kingsville, Kingsville, TX, USA.
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10
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D Vaz de Melo P, de Almeida Lima S, Araújo P, Medina Santos R, Gonzalez E, Alves Belo A, Machado-de-Ávila RA, Costal-Oliveira F, T Soccol V, Guerra-Duarte C, Rezende L, Chavez-Olortegui C. Immunoprotection against lethal effects of Crotalus durissus snake venom elicited by synthetic epitopes trapped in liposomes. Int J Biol Macromol 2020; 161:299-307. [PMID: 32464201 DOI: 10.1016/j.ijbiomac.2020.05.171] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 05/19/2020] [Accepted: 05/21/2020] [Indexed: 10/24/2022]
Abstract
Snakebites caused by Crotalus genus are the second most frequent in Brazil. Crotoxin is a beta-neurotoxin responsible for the main envenomation effects of Crotalus biting, while crotamine immobilizes the animal hind limbs, contributing to prey immobilization and to envenoming symptoms. As crotoxin and crotamine represent about 90% of Crotalus venom dry weight, these toxins are of great importance for antivenom therapy. In this sense, knowledge regarding the antigenicity/immunogenicity at the molecular level of these toxins can provide valuable information for the improvement of specific antivenoms. Therefore, the aims of this study are the identification of the B-cell epitopes from crotoxin and crotamine; and the characterization of the neutralizing potency of antibodies directed against the corresponding synthetic epitopes defined in the current study. Linear B-cell epitopes were identified using the Spot Synthesis technique probed with specific anti-C. d. terrificus venom horse IgG. One epitope of crotamine (F12PKEKICLPPSSDFGKMDCRW32) and three of crotoxin (L10LVGVEGHLLQFNKMIKFETR30; Y43CGWGGRGRPKDATDRCCFVH63 and T118YKYGYMFYPDSRCRGPSETC138) were identified. After synthesis in their soluble form, the peptides mixture correspondent to the mapped epitopes was entrapped in liposomes and used as immunogens for antibody production in rabbits. Anti-synthetic peptide antibodies were able to protect mice from the lethal activity of C. d. terrificus venom.
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Affiliation(s)
- Patrícia D Vaz de Melo
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil; Labtest Diagnostica SA, Minas Gerais, Brazil
| | - Sabrina de Almeida Lima
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Priscila Araújo
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Raíssa Medina Santos
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Edgar Gonzalez
- Icahn School of Medicine at Mount Sinai, NY, United States of America
| | - Andreza Alves Belo
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil; Labtest Diagnostica SA, Minas Gerais, Brazil
| | | | - Fernanda Costal-Oliveira
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | | | - Clara Guerra-Duarte
- Centro de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, 30510-010 Belo Horizonte, MG, Brazil
| | | | - Carlos Chavez-Olortegui
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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11
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Rodrigues CFB, Serino-Silva C, de Morais-Zani K, Kavazoi VK, Carvalho MPN, Grego KF, Chiarelli T, Tashima AK, Toyama MH, Tanaka-Azevedo AM. BoaγPLI: Structural and functional characterization of the gamma phospholipase A2 plasma inhibitor from the non-venomous Brazilian snake Boa constrictor. PLoS One 2020; 15:e0229657. [PMID: 32106235 PMCID: PMC7046197 DOI: 10.1371/journal.pone.0229657] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Accepted: 02/11/2020] [Indexed: 01/01/2023] Open
Abstract
Plasma in several organisms has components that promote resistance to envenomation by inhibiting specific proteins from snake venoms, such as phospholipases A2 (PLA2s). The major hypothesis for inhibitor's presence would be the protection against self-envenomation in venomous snakes, but the occurrence of inhibitors in non-venomous snakes and other animals has opened new perspectives for this molecule. Thus, this study showed for the first time the structural and functional characterization of the PLA2 inhibitor from the Boa constrictor serum (BoaγPLI), a non-venomous snake that dwells extensively the Brazilian territory. Therefore, the inhibitor was isolated from B. constrictor serum, with 0.63% of recovery. SDS-PAGE showed a band at ~25 kDa under reducing conditions and ~20 kDa under non-reducing conditions. Chromatographic analyses showed the presence of oligomers formed by BoaγPLI. Primary structure of BoaγPLI suggested an estimated molecular mass of 22 kDa. When BoaγPLI was incubated with Asp-49 and Lys-49 PLA2 there was no severe change in its dichroism spectrum, suggesting a non-covalent interaction. The enzymatic assay showed a dose-dependent inhibition, up to 48.2%, when BoaγPLI was incubated with Asp-49 PLA2, since Lys-49 PLA2 has a lack of enzymatic activity. The edematogenic and myotoxic effects of PLA2s were also inhibited by BoaγPLI. In summary, the present work provides new insights into inhibitors from non-venomous snakes, which possess PLIs in their plasma, although the contact with venom is unlikely.
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Affiliation(s)
- Caroline Fabri Bittencourt Rodrigues
- Interunidades em Biotecnologia, Universidade de São Paulo—Instituto de Pesquisas Tecnológicas—Instituto Butantan, São Paulo, São Paulo, Brazil
- Laboratório de Herpetologia, Instituto Butantan, São Paulo, São Paulo, Brazil
| | - Caroline Serino-Silva
- Interunidades em Biotecnologia, Universidade de São Paulo—Instituto de Pesquisas Tecnológicas—Instituto Butantan, São Paulo, São Paulo, Brazil
- Laboratório de Herpetologia, Instituto Butantan, São Paulo, São Paulo, Brazil
| | - Karen de Morais-Zani
- Interunidades em Biotecnologia, Universidade de São Paulo—Instituto de Pesquisas Tecnológicas—Instituto Butantan, São Paulo, São Paulo, Brazil
- Laboratório de Herpetologia, Instituto Butantan, São Paulo, São Paulo, Brazil
| | | | | | | | - Tassia Chiarelli
- Departamento de Bioquímica, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | | | - Marcos Hikari Toyama
- Instituto de Biociências do Litoral Paulista, Universidade Estadual Paulista, São Vicente, São Paulo, Brazil
| | - Anita Mitico Tanaka-Azevedo
- Interunidades em Biotecnologia, Universidade de São Paulo—Instituto de Pesquisas Tecnológicas—Instituto Butantan, São Paulo, São Paulo, Brazil
- Laboratório de Herpetologia, Instituto Butantan, São Paulo, São Paulo, Brazil
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12
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Sousa ID, Barbosa AR, Salvador GH, Frihling BE, Santa-Rita PH, Soares AM, Pessôa HL, Marchi-Salvador DP. Secondary hemostasis studies of crude venom and isolated proteins from the snake Crotalus durissus terrificus. Int J Biol Macromol 2019; 131:127-133. [DOI: 10.1016/j.ijbiomac.2019.03.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 03/09/2019] [Accepted: 03/09/2019] [Indexed: 10/27/2022]
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13
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Sarmiento BE, Santos Menezes LF, Schwartz EF. Insulin Release Mechanism Modulated by Toxins Isolated from Animal Venoms: From Basic Research to Drug Development Prospects. Molecules 2019; 24:E1846. [PMID: 31091684 PMCID: PMC6571724 DOI: 10.3390/molecules24101846] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 04/23/2019] [Accepted: 05/09/2019] [Indexed: 12/12/2022] Open
Abstract
Venom from mammals, amphibians, snakes, arachnids, sea anemones and insects provides diverse sources of peptides with different potential medical applications. Several of these peptides have already been converted into drugs and some are still in the clinical phase. Diabetes type 2 is one of the diseases with the highest mortality rate worldwide, requiring specific attention. Diverse drugs are available (e.g., Sulfonylureas) for effective treatment, but with several adverse secondary effects, most of them related to the low specificity of these compounds to the target. In this context, the search for specific and high-affinity compounds for the management of this metabolic disease is growing. Toxins isolated from animal venom have high specificity and affinity for different molecular targets, of which the most important are ion channels. This review will present an overview about the electrical activity of the ion channels present in pancreatic β cells that are involved in the insulin secretion process, in addition to the diversity of peptides that can interact and modulate the electrical activity of pancreatic β cells. The importance of prospecting bioactive peptides for therapeutic use is also reinforced.
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Affiliation(s)
- Beatriz Elena Sarmiento
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF 70910-900, Brazil.
| | - Luis Felipe Santos Menezes
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF 70910-900, Brazil.
| | - Elisabeth F Schwartz
- Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF 70910-900, Brazil.
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14
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Silvestrini AVP, de Macedo LH, de Andrade TAM, Mendes MF, Pigoso AA, Mazzi MV. Intradermal Application of Crotamine Induces Inflammatory and Immunological Changes In Vivo. Toxins (Basel) 2019; 11:toxins11010039. [PMID: 30646542 PMCID: PMC6357061 DOI: 10.3390/toxins11010039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 01/09/2019] [Accepted: 01/09/2019] [Indexed: 12/13/2022] Open
Abstract
Crotamine is a single-chain polypeptide with cell-penetrating properties, which is considered a promising molecule for clinical use. Nevertheless, its biosafety data are still scarce. Herein, we assessed the in vivo proinflammatory properties of crotamine, including its local effect and systemic serum parameters. Sixty male Wistar rats were intradermically injected with 200, 400 and 800 µg crotamine and analyzed after 1, 3 and 7 days. Local effect of crotamine was assessed by determination of MPO and NAG activities, NO levels and angiogenesis. Systemic inflammatory response was assessed by determination of IL-10, TNF-α, CRP, NO, TBARS and SH groups. Crotamine induced macrophages and neutrophils chemotaxis as evidenced by the upregulation of both NAG (0.5–0.6 OD/mg) and MPO (0.1–0.2 OD/mg) activities, on the first and third day of analysis, respectively. High levels of NO were observed for all concentrations and time-points. Moreover, 800 μg crotamine resulted in serum NO (64.7 μM) and local tissue NO (58.5 μM) levels higher or equivalent to those recorded for their respective histamine controls (55.7 μM and 59.0 μM). Crotamine also induced a significant angiogenic response compared to histamine. Systemically, crotamine induced a progressive increase in serum CRP levels up to the third day of analysis (22.4–45.8 mg/mL), which was significantly greater than control values. Crotamine (400 μg) also caused an increase in serum TNF-α, in the first day of analysis (1095.4 pg/mL), however a significant increase in IL-10 (122.2 pg/mL) was also recorded for the same time-point, suggesting the induction of an anti-inflammatory effect. Finally, crotamine changed the systemic redox state by inducing gradual increase in serum levels of TBARS (1.0–1.8 μM/mL) and decrease in SH levels (124.7–19.5 μM/mL) throughout the experimental period of analysis. In summary, rats intradermally injected with crotamine presented local and systemic acute inflammatory responses similarly to histamine, which limits crotamine therapeutic use on its original form.
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Affiliation(s)
- Ana Vitória Pupo Silvestrini
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, CEP 14040-903 Ribeirão Preto, SP, Brazil.
| | - Luana Henrique de Macedo
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, CEP 14040-903 Ribeirão Preto, SP, Brazil.
| | - Thiago Antônio Moretti de Andrade
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, FHO-UNIARARAS, Av. Dr. Maximiliano Baruto, 500, CEP 13607-339 Araras, SP, Brazil.
| | - Maíra Felonato Mendes
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, FHO-UNIARARAS, Av. Dr. Maximiliano Baruto, 500, CEP 13607-339 Araras, SP, Brazil.
| | - Acácio Antônio Pigoso
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, FHO-UNIARARAS, Av. Dr. Maximiliano Baruto, 500, CEP 13607-339 Araras, SP, Brazil.
| | - Maurício Ventura Mazzi
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, FHO-UNIARARAS, Av. Dr. Maximiliano Baruto, 500, CEP 13607-339 Araras, SP, Brazil.
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15
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Batista da Cunha D, Pupo Silvestrini AV, Gomes da Silva AC, Maria de Paula Estevam D, Pollettini FL, de Oliveira Navarro J, Alves AA, Remédio Zeni Beretta AL, Annichino Bizzacchi JM, Pereira LC, Mazzi MV. Mechanistic insights into functional characteristics of native crotamine. Toxicon 2018; 146:1-12. [PMID: 29574214 DOI: 10.1016/j.toxicon.2018.03.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 03/06/2018] [Accepted: 03/20/2018] [Indexed: 12/17/2022]
Abstract
The chemical composition of snake venoms is a complex mixture of proteins and peptides that can be pharmacologically active. Crotamine, a cell-penetrating peptide, has been described to have antimicrobial properties and it exerts its effects by interacting selectively with different structures, inducing changes in the ion flow pattern and cellular responses. However, its real therapeutic potential is not yet fully known. Bearing in mind that crotamine is a promising molecule in therapeutics, this study investigated the action of purified molecule in three aspects: I) antibacterial action on different species of clinical interest, II) the effect of two different concentrations of the molecule on platelet aggregation, and III) its effects on isolated mitochondria. Crotamine was purified to homogeneity in a single step procedure using Heparin Sepharose. The molecular mass of the purified enzyme was 4881.4 Da, as determined by mass spectrometry. To assess antibacterial action, changes in the parameters of bacterial oxidative stress were determined. The peptide showed antibacterial activity on Escherichia coli (MIC: 2.0 μg/μL), Staphylococcus aureus (MIC: 8-16 μg/μL) and methicillin-resistant Staphylococcus aureus (MIC: 4.0-8.0 μg/μL), inducing bacterial death by lipid peroxidation and oxidation of target proteins, determined by thiobarbituric acid reactive substances and sulfhydryl groups, respectively. Crotamine induced increased platelet aggregation (IPA) at the two concentrations analyzed (0.1 and 1.4 μg/μL) compared to ADP-induced aggregation of PRP. Mitochondrial respiratory parameters and organelle structure assays were used to elucidate the action of the compound in this organelle. The exposure of mitochondria to crotamine caused a decrease in oxidative phosphorylation and changes in mitochondrial permeability, without causing damage in the mitochondrial redox state. Together, these results support the hypothesis that, besides the antimicrobial potential, crotamine acts on different molecular targets, inducing platelet aggregation and mitochondrial dysfunction.
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Affiliation(s)
- Daniel Batista da Cunha
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, UNIARARAS, 7 Av. Dr. Maximiliano Baruto, 500, CEP 13607-339, Araras, SP, Brazil
| | - Ana Vitória Pupo Silvestrini
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, UNIARARAS, 7 Av. Dr. Maximiliano Baruto, 500, CEP 13607-339, Araras, SP, Brazil
| | - Ana Carolina Gomes da Silva
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, UNIARARAS, 7 Av. Dr. Maximiliano Baruto, 500, CEP 13607-339, Araras, SP, Brazil
| | - Deborah Maria de Paula Estevam
- Graduate Program in Agrarian and Veterinary Sciences, State University Paulista Júlio de Mesquita Filho-UNESP, Jaboticabal, SP, Brazil
| | - Flávia Lino Pollettini
- Graduate Program in Agrarian and Veterinary Sciences, State University Paulista Júlio de Mesquita Filho-UNESP, Jaboticabal, SP, Brazil
| | - Juliana de Oliveira Navarro
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, UNIARARAS, 7 Av. Dr. Maximiliano Baruto, 500, CEP 13607-339, Araras, SP, Brazil
| | - Armindo Antônio Alves
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, UNIARARAS, 7 Av. Dr. Maximiliano Baruto, 500, CEP 13607-339, Araras, SP, Brazil
| | - Ana Laura Remédio Zeni Beretta
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, UNIARARAS, 7 Av. Dr. Maximiliano Baruto, 500, CEP 13607-339, Araras, SP, Brazil
| | - Joyce M Annichino Bizzacchi
- Blood Hemostasis Laboratory, Faculty of Medical Sciences, State University of Campinas, Campinas, SP, Brazil
| | - Lilian Cristina Pereira
- Department of Bioprocesses and Biotechnology, Faculty of Agronomic Sciences, State University Paulista Júlio Mesquita Filho-UNESP, Botucatu, SP, Brazil
| | - Maurício Ventura Mazzi
- Graduate Program in Biomedical Sciences Hermínio Ometto University Center, UNIARARAS, 7 Av. Dr. Maximiliano Baruto, 500, CEP 13607-339, Araras, SP, Brazil.
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16
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Serino-Silva C, Morais-Zani K, Hikari Toyama M, Toyama DDO, Gaeta HH, Rodrigues CFB, Aguiar WDS, Tashima AK, Grego KF, Tanaka-Azevedo AM. Purification and characterization of the first γ-phospholipase inhibitor (γPLI) from Bothrops jararaca snake serum. PLoS One 2018; 13:e0193105. [PMID: 29505564 PMCID: PMC5837083 DOI: 10.1371/journal.pone.0193105] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 02/05/2018] [Indexed: 11/25/2022] Open
Abstract
Phospholipases A2 (PLA2) are enzymes acting on the cell membrane phospholipids resulting in fatty acids and lysophospholipids and deconstructing the cell membrane. This protein is commonly found in snake venoms, causing tissue inflammation in the affected area. Evidence indicates that snakes have natural resistance to their own venom due to protective properties in plasma, that inhibit the action of proteins present in their venom. Given that, this study aimed to purify and characterize a γPLI from Bothrops jararaca serum, named γBjPLI. PLA2 inhibitor was isolated using two chromatographic steps: an ion exchange column (DEAE), followed by an affinity column (crotoxin coupled to a CNBr-activated Sepharose resin). The purity and biochemical characterization of the isolated protein were analyzed by RP-HPLC, SEC, SDS-PAGE, circular dichroism and mass spectrometry. The ability to inhibit PLA2 was determined by enzymatic activity, neutralization of paw edema and myonecrosis. The protein purity was confirmed by RP-HPLC and SEC, whilst an apparent molecular mass of 25 kDa and 20 kDa was obtained by SDS-PAGE, under reducing and non-reducing conditions, respectively. According to mass spectrometry analysis, this protein showed 72% and 68% of coverage when aligned to amino acid sequences of two proteins already described as PLIs. Thus, the inhibitory activity of enzymatic, edema and myonecrotic activities by γBjPLI suggests a role of this inhibitor for protection of these snakes against self-envenomation.
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Affiliation(s)
- Caroline Serino-Silva
- Interunidades em Biotecnologia, Universidade de São Paulo - Instituto de Pesquisas Tecnológicas - Instituto Butantan, São Paulo, São Paulo, Brasil.,Laboratório de Herpetologia, Instituto Butantan, São Paulo, São Paulo, Brasil
| | - Karen Morais-Zani
- Laboratório de Herpetologia, Instituto Butantan, São Paulo, São Paulo, Brasil
| | - Marcos Hikari Toyama
- Instituto de Biociências do Litoral Paulista, Universidade Estadual Paulista, São Vicente, São Paulo, Brasil
| | - Daniela de Oliveira Toyama
- Instituto de Biociências do Litoral Paulista, Universidade Estadual Paulista, São Vicente, São Paulo, Brasil
| | - Henrique Hessel Gaeta
- Instituto de Biociências do Litoral Paulista, Universidade Estadual Paulista, São Vicente, São Paulo, Brasil
| | - Caroline Fabri Bittencourt Rodrigues
- Interunidades em Biotecnologia, Universidade de São Paulo - Instituto de Pesquisas Tecnológicas - Instituto Butantan, São Paulo, São Paulo, Brasil.,Laboratório de Herpetologia, Instituto Butantan, São Paulo, São Paulo, Brasil
| | - Wéslei da Silva Aguiar
- Interunidades em Biotecnologia, Universidade de São Paulo - Instituto de Pesquisas Tecnológicas - Instituto Butantan, São Paulo, São Paulo, Brasil
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17
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Nicolau CA, Prorock A, Bao Y, Neves-Ferreira AGDC, Valente RH, Fox JW. Revisiting the Therapeutic Potential of Bothrops jararaca Venom: Screening for Novel Activities Using Connectivity Mapping. Toxins (Basel) 2018; 10:toxins10020069. [PMID: 29415440 PMCID: PMC5848170 DOI: 10.3390/toxins10020069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/30/2018] [Accepted: 02/02/2018] [Indexed: 12/12/2022] Open
Abstract
Snake venoms are sources of molecules with proven and potential therapeutic applications. However, most activities assayed in venoms (or their components) are of hemorrhagic, hypotensive, edematogenic, neurotoxic or myotoxic natures. Thus, other relevant activities might remain unknown. Using functional genomics coupled to the connectivity map (C-map) approach, we undertook a wide range indirect search for biological activities within the venom of the South American pit viper Bothrops jararaca. For that effect, venom was incubated with human breast adenocarcinoma cell line (MCF7) followed by RNA extraction and gene expression analysis. A list of 90 differentially expressed genes was submitted to biosimilar drug discovery based on pattern recognition. Among the 100 highest-ranked positively correlated drugs, only the antihypertensive, antimicrobial (both antibiotic and antiparasitic), and antitumor classes had been previously reported for B. jararaca venom. The majority of drug classes identified were related to (1) antimicrobial activity; (2) treatment of neuropsychiatric illnesses (Parkinson’s disease, schizophrenia, depression, and epilepsy); (3) treatment of cardiovascular diseases, and (4) anti-inflammatory action. The C-map results also indicated that B. jararaca venom may have components that target G-protein-coupled receptors (muscarinic, serotonergic, histaminergic, dopaminergic, GABA, and adrenergic) and ion channels. Although validation experiments are still necessary, the C-map correlation to drugs with activities previously linked to snake venoms supports the efficacy of this strategy as a broad-spectrum approach for biological activity screening, and rekindles the snake venom-based search for new therapeutic agents.
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Affiliation(s)
- Carolina Alves Nicolau
- Laboratory of Toxinology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ 21040-900, Brazil.
- National Institute of Science and Technology on Toxins (INCTTOX), CNPq, Brasília, DF 71605-170, Brazil.
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA.
| | - Alyson Prorock
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA.
| | - Yongde Bao
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA.
| | - Ana Gisele da Costa Neves-Ferreira
- Laboratory of Toxinology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ 21040-900, Brazil.
- National Institute of Science and Technology on Toxins (INCTTOX), CNPq, Brasília, DF 71605-170, Brazil.
| | - Richard Hemmi Valente
- Laboratory of Toxinology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, RJ 21040-900, Brazil.
- National Institute of Science and Technology on Toxins (INCTTOX), CNPq, Brasília, DF 71605-170, Brazil.
| | - Jay William Fox
- Department of Microbiology, Immunology and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA.
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18
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Ojeda PG, Ramírez D, Alzate-Morales J, Caballero J, Kaas Q, González W. Computational Studies of Snake Venom Toxins. Toxins (Basel) 2017; 10:E8. [PMID: 29271884 PMCID: PMC5793095 DOI: 10.3390/toxins10010008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 12/09/2017] [Accepted: 12/18/2017] [Indexed: 12/17/2022] Open
Abstract
Most snake venom toxins are proteins, and participate to envenomation through a diverse array of bioactivities, such as bleeding, inflammation, and pain, cytotoxic, cardiotoxic or neurotoxic effects. The venom of a single snake species contains hundreds of toxins, and the venoms of the 725 species of venomous snakes represent a large pool of potentially bioactive proteins. Despite considerable discovery efforts, most of the snake venom toxins are still uncharacterized. Modern bioinformatics tools have been recently developed to mine snake venoms, helping focus experimental research on the most potentially interesting toxins. Some computational techniques predict toxin molecular targets, and the binding mode to these targets. This review gives an overview of current knowledge on the ~2200 sequences, and more than 400 three-dimensional structures of snake toxins deposited in public repositories, as well as of molecular modeling studies of the interaction between these toxins and their molecular targets. We also describe how modern bioinformatics have been used to study the snake venom protein phospholipase A2, the small basic myotoxin Crotamine, and the three-finger peptide Mambalgin.
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Affiliation(s)
- Paola G Ojeda
- Center for Bioinformatics and Molecular Simulations (CBSM), Universidad de Talca, 3460000 Talca, Chile.
- Facultad de Ciencias de la Salud, Instituto de Ciencias Biomedicas, Universidad Autonoma de Chile, 3460000 Talca, Chile.
| | - David Ramírez
- Center for Bioinformatics and Molecular Simulations (CBSM), Universidad de Talca, 3460000 Talca, Chile.
- Facultad de Ciencias de la Salud, Instituto de Ciencias Biomedicas, Universidad Autonoma de Chile, 3460000 Talca, Chile.
| | - Jans Alzate-Morales
- Center for Bioinformatics and Molecular Simulations (CBSM), Universidad de Talca, 3460000 Talca, Chile.
| | - Julio Caballero
- Center for Bioinformatics and Molecular Simulations (CBSM), Universidad de Talca, 3460000 Talca, Chile.
| | - Quentin Kaas
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Wendy González
- Center for Bioinformatics and Molecular Simulations (CBSM), Universidad de Talca, 3460000 Talca, Chile.
- Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Universidad de Talca, 3460000 Talca, Chile.
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Campeiro JD, Marinovic MP, Carapeto FC, Dal Mas C, Monte GG, Carvalho Porta L, Nering MB, Oliveira EB, Hayashi MAF. Oral treatment with a rattlesnake native polypeptide crotamine efficiently inhibits the tumor growth with no potential toxicity for the host animal and with suggestive positive effects on animal metabolic profile. Amino Acids 2017; 50:267-278. [DOI: 10.1007/s00726-017-2513-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 11/21/2017] [Indexed: 11/29/2022]
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de Oliveira SAM, Magalhães MR, de Oliveira LP, da Cunha LC. Identification of antinociceptive fraction of snake venom from Crotalus durissus collilineatus crotamine-negative and its acute toxicity evaluation. Toxicon 2016; 122:145-151. [PMID: 27720975 DOI: 10.1016/j.toxicon.2016.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 10/05/2016] [Accepted: 10/06/2016] [Indexed: 11/27/2022]
Abstract
The crude venom of the snake Crotalus durissus collilineatus (CDC) promotes neurological signs and symptoms in accidents involving humans and animals and the victims reports analgesia at the bite site, without tissue destruction. Studies shows that CDC has analgesic activity, among others. The crude venom is considered unsuitable for therapeutic purposes, with encouragement to the fractionation and purification of the same. Thus, the aim with CDC venom is: to perform fractionation by preparative HPLC; to test the antinociceptive activity of fractions and acute toxicity of active fractions. The CDC was fractionated on preparative HPLC-PDA (Oliveira et al., 2015) and the fractions were tested for their antinociceptive activity for writhing test by acetic acid (0.6%) in mice. For one of the fractions, which showed high analgesic effect both p.o. and i.p. routes, it evaluated the acute toxicity by the up and down method (OECD, 2001). In the fractionation by HPLC-PDA, CDC yielded 10 peaks (P1P10). SDS-PAGE showed that there was a good separation of components of the venom. All peaks were evaluated for their ability to reduce writhing, and the only one that apparently showed antinociceptive effect was Fr5 fraction (40 μg/kg). The Fr5 was able to reduce by 47% the number of contortions (i.p.) and 87% (p.o.), compared to control. The Fr5 fraction showed no morbidity and no mortality in the acute toxicity test (dose of 1000 μg/kg, p.o.); so it was not possible to estimate the LD50. According to the results, it can be stated that the venom and Fr5 of Crotalus durissus collilineatus snake of crotamine-negative type, may exhibit antinociceptive activity by suppressing nociception induced by acetic acid, suggesting it is related to effects on peripheral sites spinal and presents low acute toxicity values in experimental animals.
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Affiliation(s)
- Sayonara Ay More de Oliveira
- Núcleo de Estudos e Pesquisas Tóxico-Farmacológicas, Faculdade de Farmácia, Universidade Federal de Goiás, 74.605-220 Goiânia, GO, Brazil; Centro de Estudos e Pesquisas Biológicas, Departamento de Biologia, Pontifícia Universidade Católica de Goiás, 74.605-010 Goiânia, GO, Brazil.
| | - Marta Regina Magalhães
- Centro de Estudos e Pesquisas Biológicas, Departamento de Biologia, Pontifícia Universidade Católica de Goiás, 74.605-010 Goiânia, GO, Brazil
| | - Lilibete P de Oliveira
- Laboratório de Toxinologia, Departamento de Fisiologia, Instituto de Ciências Biológicas, Universidade de Brasilia, 70910-900 Brasilia, DF, Brazil
| | - Luiz Carlos da Cunha
- Núcleo de Estudos e Pesquisas Tóxico-Farmacológicas, Faculdade de Farmácia, Universidade Federal de Goiás, 74.605-220 Goiânia, GO, Brazil
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Velasco M, Díaz-García CM, Larqué C, Hiriart M. Modulation of Ionic Channels and Insulin Secretion by Drugs and Hormones in Pancreatic Beta Cells. Mol Pharmacol 2016; 90:341-57. [PMID: 27436126 DOI: 10.1124/mol.116.103861] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 07/18/2016] [Indexed: 12/11/2022] Open
Abstract
Pancreatic beta cells, unique cells that secrete insulin in response to an increase in glucose levels, play a significant role in glucose homeostasis. Glucose-stimulated insulin secretion (GSIS) in pancreatic beta cells has been extensively explored. In this mechanism, glucose enters the cells and subsequently the metabolic cycle. During this process, the ATP/ADP ratio increases, leading to ATP-sensitive potassium (KATP) channel closure, which initiates depolarization that is also dependent on the activity of TRP nonselective ion channels. Depolarization leads to the opening of voltage-gated Na(+) channels (Nav) and subsequently voltage-dependent Ca(2+) channels (Cav). The increase in intracellular Ca(2+) triggers the exocytosis of insulin-containing vesicles. Thus, electrical activity of pancreatic beta cells plays a central role in GSIS. Moreover, many growth factors, incretins, neurotransmitters, and hormones can modulate GSIS, and the channels that participate in GSIS are highly regulated. In this review, we focus on the principal ionic channels (KATP, Nav, and Cav channels) involved in GSIS and how classic and new proteins, hormones, and drugs regulate it. Moreover, we also discuss advances on how metabolic disorders such as metabolic syndrome and diabetes mellitus change channel activity leading to changes in insulin secretion.
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Affiliation(s)
- Myrian Velasco
- Department of Neurodevelopment and Physiology, Neuroscience Division, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Carlos Manlio Díaz-García
- Department of Neurodevelopment and Physiology, Neuroscience Division, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Carlos Larqué
- Department of Neurodevelopment and Physiology, Neuroscience Division, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Marcia Hiriart
- Department of Neurodevelopment and Physiology, Neuroscience Division, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City, Mexico
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Fusco LS, Rodríguez JP, Torres-Huaco F, Huancahuire-Vega S, Teibler P, Acosta O, Marangoni S, Ponce-Soto LA, Leiva LC. P9a(Cdt-PLA2) from Crotalus durissus terrificus as good immunogen to be employed in the production of crotalic anti-PLA2 IgG. Toxicol Lett 2015; 238:7-16. [DOI: 10.1016/j.toxlet.2015.06.528] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 06/18/2015] [Accepted: 06/22/2015] [Indexed: 10/23/2022]
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23
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Moore SWM, Bhat VK, Flatt PR, Gault VA, McClean S. Isolation and characterisation of insulin-releasing compounds from Crotalus adamanteus, Crotalus vegrandis and Bitis nasicornis venom. Toxicon 2015; 101:48-54. [PMID: 25959507 DOI: 10.1016/j.toxicon.2015.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 04/24/2015] [Accepted: 05/06/2015] [Indexed: 11/17/2022]
Abstract
Crude venom from three venomous snakes, Crotalus adamanteus, Crotalus vegrandis and Bitis nasicornis was fractionated by gel filtration chromatography, and selected fractions screened for in-vitro insulinotropic activity using clonal pancreatic BRIN-BD11 cells. Nineteen fractions stimulated insulin secretion and the structural identity of bioactive compounds responsible was probed using MALDI-ToF MS and N-terminal Edman degradation sequencing. Partial N-terminal sequences were determined and their homology to existing sequences identified using BLAST searching. The main insulinotropic peptide families identified were made up of snake venom serine proteinases, phospholipases A2 (PLA2) and disintegrins. Snake venom constituents may have therapeutic potential for diabetes, with each of the three viper venoms tested providing insulinotropic compounds from a range of different toxin families.
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Affiliation(s)
- Sara W M Moore
- SAAD Centre for Pharmacy and Diabetes, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, Northern Ireland, UK
| | - Vikas K Bhat
- SAAD Centre for Pharmacy and Diabetes, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, Northern Ireland, UK
| | - Peter R Flatt
- SAAD Centre for Pharmacy and Diabetes, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, Northern Ireland, UK
| | - Victor A Gault
- SAAD Centre for Pharmacy and Diabetes, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, Northern Ireland, UK
| | - Stephen McClean
- SAAD Centre for Pharmacy and Diabetes, School of Biomedical Sciences, University of Ulster, Coleraine BT52 1SA, Northern Ireland, UK.
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Identification of crotamine in the venom of Crotalus durissus collilineatus by three different methods. Toxicon 2015; 95:46-51. [DOI: 10.1016/j.toxicon.2014.12.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 12/26/2014] [Accepted: 12/29/2014] [Indexed: 11/17/2022]
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Vu TTT, Jeong B, Yu J, Koo BK, Jo SH, Robinson RC, Choe H. Soluble prokaryotic expression and purification of crotamine using an N-terminal maltose-binding protein tag. Toxicon 2014; 92:157-65. [PMID: 25448388 DOI: 10.1016/j.toxicon.2014.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 10/08/2014] [Accepted: 10/22/2014] [Indexed: 10/24/2022]
Abstract
Crotamine is a peptide toxin found in the venom of the rattlesnake Crotalus durissus terrificus. Interestingly, crotamine demonstrates promising anticancer, antimicrobial, and antifungal activities. The crotamine peptide can also deliver plasmids into rapidly dividing cells, such as cancer and stem cells, and demonstrates potent analgesic effects. Efficiently producing crotamine in mammalian cells is difficult because it is both cell-permeable and cytotoxic. Prokaryotic expression of this peptide is also difficult to maintain because it does not fold properly in the cytoplasm, resulting in aggregation and in the formation of inclusion bodies. In our current study, we show for the first time that N-terminal fusion with three protein tags-N-utilization substance protein A (NusA), protein disulfide isomerase b'a' domain (PDIb'a'), and maltose-binding protein (MBP)-enables the soluble overexpression of crotamine in the cytoplasm of Escherichia coli. MBP-tagged crotamine was purified using Ni affinity, anion exchange, and MBP chromatography. The tag was cleaved using TEV protease, and the final product was pure on a silver-stained gels. In total, 0.9 mg pure crotamine was obtained from each liter of bacterial culture with endotoxin level approximately 0.15 EU/μg, which is low enough to use in biomedical applications. The identity and intramolecular disulfide bonds were confirmed using MALDI-TOF MS analysis. Purified crotamine inhibited the hKv1.3 channel (but not hKv1.5) in a dose-dependent manner with IC50 value of 67.2 ± 44.7 nM (n = 10), indicating the correct protein folding. The crotamine product fused with MBP at its N-terminus also inhibited the hKv1.3 channel, suggesting that the N-terminus is not involved in the channel binding of the toxin.
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Affiliation(s)
- Thu Trang Thi Vu
- Department of Physiology and Bio-Medical Institute of Technology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - Boram Jeong
- Department of Physiology and Bio-Medical Institute of Technology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - Jing Yu
- Department of Physiology, Institute of Bioscience and Biotechnology, Kangwon National University School of Medicine, Chuncheon 200-701, Republic of Korea
| | - Bon-Kyung Koo
- Department of Physiology and Bio-Medical Institute of Technology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - Su-Hyun Jo
- Department of Physiology, Institute of Bioscience and Biotechnology, Kangwon National University School of Medicine, Chuncheon 200-701, Republic of Korea.
| | - Robert Charles Robinson
- Institute of Molecular and Cell Biology, A*STAR (Agency of Science, Technology and Research), Biopolis, Singapore 138673, Singapore; Department of Biochemistry, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore.
| | - Han Choe
- Department of Physiology and Bio-Medical Institute of Technology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea.
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Coronado MA, Gabdulkhakov A, Georgieva D, Sankaran B, Murakami MT, Arni RK, Betzel C. Structure of the polypeptide crotamine from the Brazilian rattlesnake Crotalus durissus terrificus. ACTA CRYSTALLOGRAPHICA. SECTION D, BIOLOGICAL CRYSTALLOGRAPHY 2013; 69:1958-64. [PMID: 24100315 PMCID: PMC3792641 DOI: 10.1107/s0907444913018003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Accepted: 06/29/2013] [Indexed: 11/10/2022]
Abstract
The crystal structure of the myotoxic, cell-penetrating, basic polypeptide crotamine isolated from the venom of Crotalus durissus terrificus has been determined by single-wavelength anomalous dispersion techniques and refined at 1.7 Å resolution. The structure reveals distinct cationic and hydrophobic surface regions that are located on opposite sides of the molecule. This surface-charge distribution indicates its possible mode of interaction with negatively charged phospholipids and other molecular targets to account for its diverse pharmacological activities. Although the sequence identity between crotamine and human β-defensins is low, the three-dimensional structures of these functionally related peptides are similar. Since crotamine is a leading member of a large family of myotoxic peptides, its structure will provide a basis for the design of novel cell-penetrating molecules.
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Affiliation(s)
- Monika A. Coronado
- Multi User Center for Biomolecular Innovation, Department of Physics, São Paulo State University, UNESP/IBILCE, C. Postal 136, 15054-000 São José do Rio Preto-SP, Brazil
- Institute of Biochemistry and Molecular Biology, Hamburg University, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
| | - Azat Gabdulkhakov
- Institute of Protein Research, RAS, Pushchino, Moscow Region 142290, Russian Federation
| | - Dessislava Georgieva
- Institute of Biochemistry and Molecular Biology, Hamburg University, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
| | - Banumathi Sankaran
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94702, USA
| | - Mario T. Murakami
- Biosciences National Laboratory, National Center for Energy and Materials Research, Giuseppe Maximo Scolfaro 10000, 13083-970 Campinas-SP, Brazil
| | - Raghuvir K. Arni
- Multi User Center for Biomolecular Innovation, Department of Physics, São Paulo State University, UNESP/IBILCE, C. Postal 136, 15054-000 São José do Rio Preto-SP, Brazil
| | - Christian Betzel
- Institute of Biochemistry and Molecular Biology, Hamburg University, Martin-Luther-King Platz 6, 20146 Hamburg, Germany
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Toyama DDO, Diz Filho EBDS, Cavada BS, da Rocha BAM, de Oliveira SCB, Cotrim CA, Soares VCG, Delatorre P, Marangoni S, Toyama MH. Umbelliferone induces changes in the structure and pharmacological activities of Bn IV, a phospholipase A2 isoform isolated from Bothrops neuwiedi. Toxicon 2011; 57:851-60. [DOI: 10.1016/j.toxicon.2011.02.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 02/20/2011] [Accepted: 02/22/2011] [Indexed: 10/18/2022]
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28
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Delatorre P, Rocha BAM, Santi-Gadelha T, Gadelha CAA, Toyama MH, Cavada BS. Crystal structure of Bn IV in complex with myristic acid: a Lys49 myotoxic phospholipase A₂ from Bothrops neuwiedi venom. Biochimie 2010; 93:513-8. [PMID: 21108987 DOI: 10.1016/j.biochi.2010.11.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Accepted: 11/16/2010] [Indexed: 11/18/2022]
Abstract
The LYS49-PLA₂s myotoxins have attracted attention as models for the induction of myonecrosis by a catalytically independent mechanism of action. Structural studies and biological activities have demonstrated that the myotoxic activity of LYS49-PLA₂ is independent of the catalytic activity site. The myotoxic effect is conventionally thought to be to due to the C-terminal region 111-121, which plays an effective role in membrane damage. In the present study, Bn IV LYS49-PLA₂ was isolated from Bothrops neuwiedi snake venom in complex with myristic acid (CH₃(CH₂)₁₂COOH) and its overall structure was refined at 2.2 Å resolution. The Bn IV crystals belong to monoclinic space group P2₁ and contain a dimer in the asymmetric unit. The unit cell parameters are a = 38.8, b = 70.4, c = 44.0 Å. The biological assembly is a "conventional dimer" and the results confirm that dimer formation is not relevant to the myotoxic activity. Electron density map analysis of the Bn IV structure shows clearly the presence of myristic acid in catalytic site. The relevant structural features for myotoxic activity are located in the C-terminal region and the Bn IV C-terminal residues NKKYRY are a probable heparin binding domain. These findings indicate that the mechanism of interaction between Bn IV and muscle cell membranes is through some kind of cell signal transduction mediated by heparin complexes.
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Affiliation(s)
- P Delatorre
- Departamento de Biologia Molecular, Universidade Federal da Paraíba, João Pessoa, Paraíba, Brazil.
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29
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Toxins that Modulate Ionic Channels as Tools for Exploring Insulin Secretion. Cell Mol Neurobiol 2010; 30:1275-81. [DOI: 10.1007/s10571-010-9586-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 09/02/2010] [Indexed: 01/26/2023]
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30
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Toyama DO, Marangoni S, Diz-Filho EBS, Oliveira SCB, Toyama MH. Effect of umbelliferone (7-hydroxycoumarin, 7-HOC) on the enzymatic, edematogenic and necrotic activities of secretory phospholipase A2 (sPLA2) isolated from Crotalus durissus collilineatus venom. Toxicon 2009; 53:417-26. [PMID: 19470355 DOI: 10.1016/j.toxicon.2008.12.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2008] [Revised: 12/11/2008] [Accepted: 12/23/2008] [Indexed: 11/15/2022]
Abstract
Flavonoids, coumarins and other polyphenolic compounds are powerful antioxidants both in hydrophilic and lipophylic environments with diverse pharmacological properties including anti-inflammatory activity. Despite being widely used as powerful therapeutic agents for blood coagulation disorders, more specifically to control some serine protease enzymes, the mechanism of anti-inflammatory activity of coumarins is unknown, unlike that of flavonoids. Although their controlling effect on serine proteases is well acknowledged, their action on secretory phospholipase A2 (sPLA2) remains obscure. The present study describes the interaction between umbelliferone (7-HOC) and the sPLA2 from Crotalus durissus collilineatus venom. In vitro inhibition of sPLA2 enzymatic activity by 7-HOC was estimated using 4N3OBA as substrate, resulting in an irreversible decrease in such activity proportional to 7-HOC concentration. The biophysical interaction between 7-HOC and sPLA2 was examined by fluorescent spectral analysis and circular dichroism studies. Results from both techniques clearly showed that 7-HOC strongly modified the secondary structure of this enzyme and CD spectra revealed that it strongly decreased sPLA2 alpha-helical conformation. In addition, two-dimensional electrophoresis indicated an evident difference between HPLC-purified native and 7-HOC-treated sPLA2s, which were used in pharmacological experiments to compare their biological activities. In vivo anti-inflammatory activity was assessed by the sPLA2-induced mouse paw edema model, in which 7-HOC presented an effect similar to those of dexamethasone and cyproheptadine against the pro-inflammatory effect induced by native sPLA2 on the mouse paw edema, mast cell degranulation and skin edema. On the other hand, 7-HOC exhibited a more potent inhibitory effect on sPLA2 than that of p-bromophenacyl bromide (p-BPB). Our data suggest that 7-HOC interacts with sPLA2 and causes some structural modifications that lead to a sharp decrease or inhibition of the edematogenic and myotoxic activities of this enzyme, indicating its potential use to suppress inflammation induced by sPLA2 from the snake venom.
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Affiliation(s)
- D O Toyama
- Centro de Cidncias Biológicas e da Saúde, Univesidade Mackenzie, São Paulo, Brazil
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31
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Martins RD, Alves RS, Martins AMC, Barbosa PSF, Evangelista JSAM, Evangelista JJF, Ximenes RM, Toyama MH, Toyama DO, Souza AJF, Orts DJB, Marangoni S, de Menezes DB, Fonteles MC, Monteiro HSA. Purification and characterization of the biological effects of phospholipase A(2) from sea anemone Bunodosoma caissarum. Toxicon 2009; 54:413-20. [PMID: 19463845 DOI: 10.1016/j.toxicon.2009.05.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 04/25/2009] [Accepted: 05/11/2009] [Indexed: 10/20/2022]
Abstract
Sea anemones contain a variety of biologically active substances. Bunodosoma caissarum is a sea anemone from the Cnidaria phylum, found only in Brazilian coastal waters. The aim of the present work was to study the biological effects of PLA(2) isolated from the sea anemone B. caissarum on the isolated perfused kidney, the arteriolar mesenteric bed and on insulin secretion. Specimens of B. caissarum were collected from the São Vicente Channel on the southern coast of the State of São Paulo, Brazil. Reverse phase HPLC analysis of the crude extract of B. caissarum detected three PLA(2) proteins (named BcPLA(2)1, BcPLA(2)2 and BcPLA(2)3) found to be active in B. caissarum extracts. MALDI-TOF mass spectrometry of BcPLA(2)1 showed one main peak at 14.7 kDa. The N-terminal amino acid sequence of BcPLA(2)1 showed high amino acid sequence identity with PLA(2) group III protein isolated from the Mexican lizard (PA23 HELSU, HELSU, PA22 HELSU) and with the honey bee Apis mellifera (PLA(2) and 1POC_A). In addition, BcPLA(2)1 also showed significant overall homology to bee PLA(2). The enzymatic activity induced by native BcPLA(2)1 (20 microg/well) was reduced by chemical treatment with p-bromophenacyl bromide (p-BPB) and with morin. BcPLA(2)1 strongly induced insulin secretion in presence of high glucose concentration. In isolated kidney, the PLA(2) from B. caissarum increased the perfusion pressure, renal vascular resistance, urinary flow, glomerular filtration rate, and sodium, potassium and chloride levels of excretion. BcPLA(2)1, however, did not increase the perfusion pressure on the mesenteric vascular bed. In conclusion, PLA(2), a group III phospholipase isolated from the sea anemone B. caissarum, exerted effects on renal function and induced insulin secretion in conditions of high glucose concentration.
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Affiliation(s)
- René D Martins
- Department of Physiology and Pharmacology - Institute of Biomedicine and Clinical Research Unit - Federal University of Ceará, Fortaleza, CEP-60.420-970, Ceará, Brazil
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32
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Diz Filho E, Marangoni S, Toyama D, Fagundes F, Oliveira S, Fonseca F, Calgarotto A, Joazeiro P, Toyama M. Enzymatic and structural characterization of new PLA2 isoform isolated from white venom of Crotalus durissus ruruima. Toxicon 2009; 53:104-14. [DOI: 10.1016/j.toxicon.2008.10.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2008] [Revised: 10/12/2008] [Accepted: 10/22/2008] [Indexed: 12/01/2022]
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33
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Renal and vascular effects of the natriuretic peptide isolated from Crotalus durissus cascavella venom. Toxicon 2008; 52:737-44. [DOI: 10.1016/j.toxicon.2008.08.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Revised: 08/18/2008] [Accepted: 08/20/2008] [Indexed: 11/22/2022]
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34
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dos Santos ML, Fagundes FHR, Teixeira BRF, Toyama MH, Aparicio R. Purification and preliminary crystallographic analysis of a new Lys49-PLA2 from B. Jararacussu. Int J Mol Sci 2008; 9:736-750. [PMID: 19325781 PMCID: PMC2635704 DOI: 10.3390/ijms9050736] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Revised: 03/06/2008] [Accepted: 03/22/2008] [Indexed: 11/16/2022] Open
Abstract
BjVIII is a new myotoxic Lys49-PLA2 isolated from Bothrops jararacussu venom that exhibits atypical effects on human platelet aggregation. To better understand the mode of action of BjVIII, crystallographic studies were initiated. Two crystal forms were obtained, both containing two molecules in the asymmetric unit (ASU). Synchrotron radiation diffraction data were collected to 2.0 A resolution and 1.9 A resolution for crystals belonging to the space group P2(1)2(1)2(1) (a = 48.4 A, b = 65.3 A, c = 84.3 A) and space group P3(1)21 (a = b = 55.7 A, c = 127.9 A), respectively. Refinement is currently in progress and the refined structures are expected to shed light on the unusual platelet aggregation activity observed for BjVIII.
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Affiliation(s)
- Marcelo L. dos Santos
- Laboratório de Biologia Estrutural e Cristalografia, Instituto de Química, Universidade Estadual de Campinas, CP 6154, 13083–970, Campinas-SP, Brazil
| | | | - Bruno R. F. Teixeira
- Laboratório de Biologia Estrutural e Cristalografia, Instituto de Química, Universidade Estadual de Campinas, CP 6154, 13083–970, Campinas-SP, Brazil
| | - Marcos H. Toyama
- Laboratório de Química de Macromoléculas, UNESP/CLP, São Vicente-SP, Brazil
| | - Ricardo Aparicio
- Laboratório de Biologia Estrutural e Cristalografia, Instituto de Química, Universidade Estadual de Campinas, CP 6154, 13083–970, Campinas-SP, Brazil
- Author to whom correspondence should be addressed; E-mail:
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Braga MDM, Martins AMC, de Menezes DB, Barbosa PSF, Evangelista JSAM, Toyama MH, Toyama DO, Fonteles MC, Monteiro HSA. Purification and biological activity of the thrombin-like substance isolated from Bothrops insularis venom. Toxicon 2007; 49:329-38. [PMID: 17161857 DOI: 10.1016/j.toxicon.2006.10.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2006] [Revised: 10/17/2006] [Accepted: 10/18/2006] [Indexed: 11/21/2022]
Abstract
The venom of Bothrops insularis snake, known in Brazil as jararaca ilhoa, contains a variety of proteolytic enzymes such as a thrombin-like substance that is responsible for various pharmacological effects. B. insularis venom chromatography profile showed an elution of seven main fractions. The thrombin-like activity was detected in fractions I and III, the latter being subjected to two other chromatographic procedures, so to say DEAE and Hi Trap Benzamidine. The purity degree of this fraction was confirmed by analytical reverse phase HPLC, which displayed only one main fraction confirmed by SDS-PAGE constituting fraction III. About 5 microg of fraction III protein potentiated the secretion of insulin induced by 2.8 mM of glucose in rats isolated pancreatic beta-cells treated; the increase being around 3-fold higher than its respective control. B. insularis lectin (BiLec; 10 microg/mL) was also studied as to its effect on the renal function of isolated perfused rat kidneys with the use of six Wistar rats. BiLec increased perfusion pressure (PP), renal vascular resistance (RVR), urinary flow (UF) and glomerular filtration rate (GFR). Sodium (%TNa+) and chloride tubular reabsorption (%TCl-) decreased at 120 min, without alteration in potassium transport. In conclusion, the thrombin-like substance isolated from B. insularis venom induced an increase in insulin secretion, in vitro, and transiently altered vascular, glomerular and tubular parameters in the isolated rat kidney.
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36
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Toyama MH, Toyama DDO, Passero LFD, Laurenti MD, Corbett CE, Tomokane TY, Fonseca FV, Antunes E, Joazeiro PP, Beriam LOS, Martins MAC, Monteiro HSA, Fonteles MC. Isolation of a new l-amino acid oxidase from Crotalus durissus cascavella venom. Toxicon 2006; 47:47-57. [PMID: 16307769 DOI: 10.1016/j.toxicon.2005.09.008] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2005] [Accepted: 09/21/2005] [Indexed: 10/25/2022]
Abstract
A novel l-amino acid oxidase (LAO) (Casca LAO) from Crotalus durissus cascavella venom was purified to a high degree of molecular homogeneity using a combination of molecular exclusion and ion-exchange chromatography system. The purified monomer of LAO presented a molecular mass of 68 kDa and pI estimated in 5.43, which were determined by two-dimensional electrophoresis. The 71st N-terminal amino acid sequence of the LAO from Crotalus durissus cascavella presented a high amino acid sequence similarities with other LAOs from Colloselasma rhosostoma, Crotalus adamanteus, Agkistrodon h. blomhoffi, Agkistrodon h. halys and Trimeresurus stejnegeri. LAO displayed a Michaelis-Menten behavior with a kilometer of 46.7 microM and an optimum pH for enzymatic activity of 6.5. Casca LAO induced a dose-dependent platelet aggregation, which was abolished by catalase and inhibited by indomethacin and aspirin. These results suggest that the production of H2O2 is involved in subsequent activation of inflammatory enzymes, such as thromboxane. Casca LAO also inhibited the bacterial growth of Gram-negative (Xanthomonas axonopodis pv passiflorae) and Gram-positive (S. mutans) strains. Electron microscopy assessments of both bacterial strains suggest that the hydrogen peroxide produced by LAO induce bacterial membrane rupture and consequently loss of cytoplasmatic content. This LAO exhibited a high antileishmanic activity against the promastigote of Leishmania amazonensis in vitro, its activity was dependent on the production of hydrogen peroxide, and the 50% inhibitory concentration was estimated in 2.39 microg/ml.
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Affiliation(s)
- Marcos H Toyama
- UNESP, Campus do Litoral Paulista, São Vicente, São Paulo, São Paulo, Brazil.
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37
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Oguiura N, Boni-Mitake M, Rádis-Baptista G. New view on crotamine, a small basic polypeptide myotoxin from South American rattlesnake venom. Toxicon 2005; 46:363-70. [PMID: 16115660 DOI: 10.1016/j.toxicon.2005.06.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2005] [Revised: 05/10/2005] [Accepted: 06/08/2005] [Indexed: 11/21/2022]
Abstract
Crotamine is a toxin from the Crotalus durissus terrificus venom, composed of 42 amino acid residues and three disulfide bridges. It belongs to a toxin family previously called Small Basic Polypeptide Myotoxins (SBPM) whose members are widely distributed through the Crotalus snake venoms. Comparison of SBPM amino acid sequences shows high similarities. Crotamine induces skeletal muscle spasms, leading to spastic paralysis of the hind limbs of mice, by interacting with sodium channels on muscle cells. The crotamine gene with 1.8 kbp is organized into three exons, which are separated by a long phase-1 and short phase-2 introns and mapped to chromosome 2. The three-dimensional structure of crotamine was recently solved and shares a structural topology with other three disulfide bond-containing peptide similar to human beta-defensins and scorpion Na+ channel toxin. Novel biological activities have been reported, such as the capacity to penetrate undifferentiated cells, to localize in the nucleus, and to serve as a marker of actively proliferating living cells.
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Affiliation(s)
- N Oguiura
- Laboratório de Herpetologia, Instituto Butantan, Av. Vital Brazil, 1500, São Paulo 05503-900, SP-Brazil.
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38
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Nogueira TCA, Ferreira F, Toyama MH, Stoppiglia LF, Marangoni S, Boschero AC, Carneiro EM. Characterization of the insulinotropic action of a phospholipase A2 isolated from Crotalus durissus collilineatus rattlesnake venom on rat pancreatic islets. Toxicon 2005; 45:243-8. [PMID: 15626373 DOI: 10.1016/j.toxicon.2004.10.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2004] [Revised: 10/19/2004] [Accepted: 10/20/2004] [Indexed: 10/26/2022]
Abstract
The ability of PLA2 and crotapotin, isolated from Crotalus durissus collilineatus rattlesnake venom, to stimulate insulin secretion from isolated rat islets was examined. PLA2 and crotapotin stimulated insulin secretion at 2.8 mmol/L glucose, whereas at a high glucose concentrations (16.7 mmol/L) only PLA2 stimulated secretion. Nifedipine (10 micromol/L) did not alter the ability of PLA2 to increase insulin secretion stimulated by a depolarizing concentration of K+ (30 mmol/L). PLA2 did not affect 14CO2 production but significantly increased the efflux of arachidonic acid from isolated islets. These results indicate that PLA2-stimulated secretion is not dependent on an additional influx of Ca2+ through L-type Ca(2+)-channels but rather is associated with arachidonic acid formation in pancreatic islets.
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Affiliation(s)
- Tatiane C A Nogueira
- Departamento de Fisiologia e Biofísica and Departamento de Bioquímica, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), CP 6109, Campinas, SP 13083-970, Brazil
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39
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Toyama OD, Boschero CA, Martins AM, Fonteles CM, Monteiro SH, Toyama HM. Structure?Function Relationship of New Crotamine Isoform from the Crotalus durissus cascavella. Protein J 2005; 24:9-19. [PMID: 15756813 DOI: 10.1007/s10930-004-0601-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
In this work we isolated a novel crotamine like protein from the Crotalus durissus cascavella venom by combination of molecular exclusion and analytical reverse phase HPLC. Its primary structure was:YKRCHKKGGHCFPKEKICLPPSSDLGKMDCRWKRK-CCKKGS GK. This protein showed a molecular mass of 4892.89 Da that was determined by Matrix Assisted Laser Desorption Ionization Time-of-flight (MALDI-TOF) mass spectrometry. The approximately pI value of this protein was determined in 9.9 by two-dimensional electrophoresis. This crotamine-like protein isolated here and that named as Cro 2 produced skeletal muscle spasm and spastic paralysis in mice similarly to other crotamines like proteins. Cro 2 did not modify the insulin secretion at low glucose concentration (2.8 and 5.6 mM), but at high glucose concentration (16.7 mM) we observed an insulin secretion increasing of 2.7-3.0-fold than to control. The Na+ channel antagonist tetrodoxin (6 mM) decreased glucose and Cro 2-induced insulin secretion. These results suggested that Na+ channel are involved in the insulin secretion. In this article, we also purified some peptide fragment from the treatment of reduced and carboxymethylated Cro 2 (RC-Cro 2) with cyanogen bromide and protease V8 from Staphylococcus aureus. The isolated pancreatic beta-cells were then treated with peptides only at high glucose concentration (16.7 mM), in this condition only two peptides induced insulin secretion. The amino acid sequence homology analysis of the whole crotamine as well as the biologically-active peptide allowed determining the consensus region of the biologically-active crotamine responsible for insulin secretion was KGGHCFPKE and DCRWKWKCCKKGSG.
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Affiliation(s)
- O D Toyama
- Departamento de Bioquìmica, UNICAMP, Campinas, São Paulo, Brazil
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40
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Wermelinger LS, Dutra DLS, Oliveira-Carvalho AL, Soares MR, Bloch C, Zingali RB. Fast analysis of low molecular mass compounds present in snake venom: identification of ten new pyroglutamate-containing peptides. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2005; 19:1703-8. [PMID: 15912471 DOI: 10.1002/rcm.1973] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Characterization of the peptide content in snake venoms can be an important tool for the investigation of new pharmacological lead compounds. For this purpose, single-step analysis of crude venoms has recently been demonstrated using mass spectrometry (MS) techniques. Reproducible profiles of ions in MS and MS/MS spectra may also be used to compare venoms from different species. In this work matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) was used to obtain mass patterns of the major peptides (<8 kDa) found in pooled venoms from the genera Bothrops and Crotalus. Venoms from five different Bothrops species (B. jararaca, B. insularis, B. alternatus, B. jararacussu, and B. neuwiedi) and three Crotalus species (C. viridis, C. adamanteus and C. durissus terrificus) were analyzed. In agreement with other reports, venoms from Bothrops species contained a variety of peptides in the range m/z 1000-1500, and in some samples larger components (m/z 7000-8000) were detected. In the Crotalus species venoms were rich in peptides ranging from m/z 1000-1500 and 4000-5500. MS/MS experiments on the low molecular mass peptides (m/z 1000-1500) confirmed the presence of ten new bradykinin-potentiating peptides among venoms from genera Bothrops and Crotalus. In order to determine whether additional peptides could be identified after partial purification, B. jararaca venom was subjected to size-exclusion chromatography on Sephacryl S-200, and two distinct low molecular mass pools were analyzed further by MALDI-TOFMS. No additional peptides were detected from the pool with masses below 2000 Da but a substantial improvement with better resolution was observed for the pool with masses above 7000 Da, indicating that complex samples such as crude snake venoms can be analyzed for low molecular mass peptides using a single-step procedure.
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Affiliation(s)
- Luciana Serrão Wermelinger
- Laboratório de Proteoma e Microsseqüenciamento de Proteínas e Petídeos, Instituto de Bioquímica Médica, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Toyama MH, Marangoni S, Novello JC, Leite GB, Prado-Franceschi J, da Cruz-Höfling MA, Rodrigues-Simioni L. Biophysical, histopathological and pharmacological characterization of crotamine isoforms F22 and F32. Toxicon 2003; 41:493-500. [PMID: 12657319 DOI: 10.1016/s0041-0101(02)00390-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Two major crotamine isoforms (F22 and F32) were obtained after three chromatographic steps and were assayed in mouse phrenic nerve-diaphragm preparations. F32 and F22 (0.5 microg/ml, n=4) produced a facilitatory effect, which increased isometric twitch-tension by 300 and 230%, respectively, after a 120 min incubation. At a concentration of 0.1 microg/ml, both isoforms increased the twitch-tension by about 160%. However, when the isoforms were co-incubated (final concentration, 0.5 microg/ml) for 30 min prior to testing, they did not cause the facilitation seen with > or =0.1 microg/ml of each isoform alone. Histologically, F32 and F22 at 0.5 and 1 microg/ml were quantitatively alike in inducing tissue myonecrosis. However, a mixture of the two isoforms (final concentration, 0.5 microg/ml) significantly attenuated the damage seen with either toxin alone. Mass spectrometry analysis showed that the isoforms had the same molecular mass (4.8 kDa) and that they existed as monomers with a highly stable structure. These results indicate that F22 and F32 acted on muscle cells of the mouse phrenic-nerve diaphragm preparation through similar mechanisms. Since the isoforms did not produce the expected summation in the increase in muscle twitch-tension, it is possible that they may have different affinities for the sodium channel subunits.
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Affiliation(s)
- Marcos H Toyama
- Department of Physiology and Biophysics, Institute of Biology, P.O. Box 6109, CEP 13083-970, Campinas, SP, Brazil
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Ponce-Soto LA, Toyama MH, Hyslop S, Novello JC, Marangoni S. Isolation and preliminary enzymatic characterization of a novel PLA2 from Crotalus durissus collilineatus venom. JOURNAL OF PROTEIN CHEMISTRY 2002; 21:131-6. [PMID: 12018613 DOI: 10.1023/a:1015332314389] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A crotoxin homolog was purified from the Crotalus durissus collilineatus venom using molecular exclusion and reverse-phase HPLC. This crotoxin contained one PLA2 (Cdcolli III F6) and four crotapotin isoforms, whereas crotoxin from Crotalus durissus terrificus venom had three PLA2 iso forms and two crotapotin isoforms. SDS-PAGE showed that the C. d. collilineatus PLA2 and crotapotin had relative molecular mass of 15 and 9 kDa, respectively. Neither the PLA2 (Cdcolli III F6) nor the crotapotins (Cdcolli III F3 and F4) had any neurotoxicity in mouse phrenic nerve-diaphragm preparations when tested alone. However, when PLA2 and crotapotin were coincubated before testing, the neurotoxicity was restored to a level similar to test in the venom in native crotoxin. The two crotapotins (Cdcolli III F3 and F4) differed in their ability to inhibit PLA2 activity, perhaps because of variations in their affinities for this enzyme. Cdcolli III F6 showed allosteric enzymatic behavior, with maximal activity at pH 8.3 and 36 degrees C. Full PLA2 activity required the presence of a low Ca2+ concentration and was inhibited by Cu2+ and Zn2+ and by Cu2+ and Mg2+ in the presence and absence of Ca2+, respectively. These results indicate that crotoxin from C. d. collineatus venom is very similar enzymatically to crotoxin from C. d. terrificus.
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Affiliation(s)
- L A Ponce-Soto
- Departamento de Bioquímica, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), SP, Brasil
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Siqueira AM, Martins NF, De Lima ME, Diniz CR, Cartier A, Brown D, Maigret B. A proposed 3D structure for crotamine based on homology building, molecular simulations and circular dichroism. J Mol Graph Model 2002; 20:389-98. [PMID: 11887801 DOI: 10.1016/s1093-3263(01)00139-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Crotamine, isolated from the venom of the South American rattlesnake Crotalus durissus terrificus is a strongly basic 42-amino acid polypeptide belonging to the small basic myotoxin family. As no tridimensional structure is available for this myotoxin subfamily, despite its important pharmacological interest, we propose in this paper a theoretical 3D model for crotamine. Starting from a homology modelling procedure, followed by intensive molecular dynamics (MD) simulations in water and complementary CD experiments, the designed 3D model is the first example of a tridimensional structure in this family of small basic myotoxins. Crotamine, therefore, belongs to a newly identified structural family presenting a common fold also found in beta-defensin and antopleurine-B. The proposed 3D model will be used for future calculations about crotamine aggregation and interaction with membranes.
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Affiliation(s)
- A M Siqueira
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Brazil
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44
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Beghini DG, Toyama MH, Hyslop S, Sodek LC, Novello, Marangoni S. Enzymatic characterization of a novel phospholipase A2 from Crotalus durissus cascavella rattlesnake (Maracambóia) venom. JOURNAL OF PROTEIN CHEMISTRY 2000; 19:679-84. [PMID: 11307952 DOI: 10.1023/a:1007152303179] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The PLA2 and crotapotin subunits of crotoxin from Crotalus durissus cascavella venom were purified by a combination of high-performance liquid chromatography (HPLC) molecular exclusion (Protein Pack 300SW column) and reverse-phase HPLC (RP-HPLC). Tricine SDS-PAGE showed that the PLA2 and crotapotins migrated as single bands with estimated molecular masses of 15 and 9 kDa, respectively. The amino acid composition of the PLA2 showed the presence of 14 half-cysteines and a high content of basic residues (Lys, Arg, His), whereas the crotapotins were rich in hydrophobic, negatively charged residues and half-cysteines. The PLA2 showed allosteric behavior, with maximal activity at pH 8.3 and 35-40 degrees C. C. d. cascavella PLA2 required Ca2+ for activity but was inhibited by Cu2+ and Zn2+ and by Cu2+ and Mg2+ in the presence and absence of Ca2+, respectively. Crotapotin (F3) and heparin inhibited the catalytic activity of the PLA2 by acting as allosteric inhibitors.
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Affiliation(s)
- D G Beghini
- Departamento de Bioquímica, Instituto de Biologia, Universidade Estadual de Campinas SP, Brazil
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45
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Beghini DG, Toyama MH, Hyslop S, Sodek L, Novello JC, Marangoni S. Enzymatic characterization of a novel phospholipase A2 from Crotalus durissus cascavella rattlesnake (Maracambóia) venom. JOURNAL OF PROTEIN CHEMISTRY 2000; 19:603-7. [PMID: 11233174 DOI: 10.1023/a:1007123329817] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The PLA2 and crotapotin subunits of crotoxin from Crotalus durissus cascavella venom were purified by a combination of HPLC molecular exclusion (Protein Pack 300SW column) and reverse-phase HPLC (RP-HPLC). Tricine SDS-PAGE showed that the PLA2 and crotapotins migrated as single bands with estimated molecular masses of 15 and 9 kDa, respectively. The amino acid composition of the PLA2 showed the presence of 14 half-cysteines and a high content of basic residues (Lys, Arg, His), whereas the crotapotins were rich in hydrophobic, negatively charged residues and half-cysteines. The PLA2 showed allosteric behavior, with maximal activity at pH 8.3 and 35-40 degrees C. The C. d. cascavella PLA2 required Ca2+ for activity, but was inhibited by Cu2+ and Zn2+ and by Cu2+ and Mg2+ in the presence and absence of Ca2+, respectively. Crotapotin (F3) and heparin inhibited the catalytic activity of the PLA2 by acting as allosteric inhibitors.
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Affiliation(s)
- D G Beghini
- Departamento de Bioquímica, Instituto de Biologia, Universidade Estadual de Campinas, SP, Brazil
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