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Ortolani PL, Campos PC, Fortes-Dias CL. The PLA 2 inhibitor from Crotalus durissus terrificus blood plasma (CNF) inhibits group III-PLA 2 from honeybee venom. Toxicon 2024; 242:107711. [PMID: 38583578 DOI: 10.1016/j.toxicon.2024.107711] [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: 12/18/2023] [Revised: 04/03/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Crotalus neutralizing factor (CNF) is an endogenous glycoprotein from Crotalus durissus terrificus snake blood that inhibits secretory phospholipases A2 (sPLA2) from the Viperid but not from Elapid venoms (subgroups IA and IIA, respectively). In the present study, we demonstrated that CNF can inhibit group III-PLA2 from bee venom by forming a stable enzyme-inhibitor complex. This finding opens up new possibilities for the potential use of CNF and/or CNF-based derivatives in the therapeutics of bee stings.
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Affiliation(s)
- Paula Ladeira Ortolani
- Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias (FUNED), Belo Horizonte, Minas Gerais, Brazil
| | - Patrícia Cota Campos
- Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias (FUNED), Belo Horizonte, Minas Gerais, Brazil
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Campos PC, Oliveira HCD, Ortolani PL, Amaral de Melo L, Fontes MRM, Fortes-Dias CL. Mapping possible interaction sites for crotoxin in CNF, a gamma PLA 2 inhibitor from Crotalus durissus terrificus rattle snake, using SPOT synthesis. Toxicon 2023; 234:107267. [PMID: 37661064 DOI: 10.1016/j.toxicon.2023.107267] [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: 06/09/2023] [Revised: 08/02/2023] [Accepted: 08/28/2023] [Indexed: 09/05/2023]
Abstract
Phospholipases A2 (PLA2s) are main components of snake venoms. Several snake species possess endogenous PLA2 inhibitors in their circulating blood, which are generally known as sbPLIs (an acronym for snake blood phospholipase A2inhibitors). The sbPLIs are categorized in three classes (alpha, beta or gamma) depending on the existence of distinguishing protein domains in their structure. The Crotalus durrissus terrificus venom has a highly neurotoxic PLA2 - crotoxin (CTX) - in its composition and the self-protection of the snake is mainly ensured by a sbγPLI named CNF (standing for Crotalusneutralizing factor). In an attempt to find smaller molecules able to inhibit the catalytic activity of CTX, in the present study we used linear peptide arrays to identify CNF segments possibly involved in the interaction with the toxin. Five reacting segments were identified as possible interacting regions. The target peptides were synthesized and located in the in silico CNF structure. Although all of them are exposed to the solvent, high concentrations were needed to inhibit the PLA2 activity of the whole venom or CTX. Limitations of the methodology employed and particular characteristics of CTX inhibition by CNF are discussed.
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Affiliation(s)
- Patricia Cota Campos
- Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Belo Horizonte, Minas Gerais, Brazil
| | - Hamine Cristina de Oliveira
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil
| | - Paula Ladeira Ortolani
- Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Belo Horizonte, Minas Gerais, Brazil
| | - Lutiana Amaral de Melo
- Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Belo Horizonte, Minas Gerais, Brazil
| | - Marcos R M Fontes
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil; Instituto de Estudos Avançados do Mar (IEAMar), Universidade Estadual Paulista (UNESP), São Vicente, São Paulo, Brazil
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Crotalus Neutralizing Factor (CNF) inhibits the toxic effects of Crotoxin at mouse neuromuscular preparations. Toxicon 2020; 191:48-53. [PMID: 33387548 DOI: 10.1016/j.toxicon.2020.12.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/18/2020] [Accepted: 12/27/2020] [Indexed: 12/21/2022]
Abstract
Crotalus Neutralizing Factor (CNF) was the first phospholipase A2 inhibitor isolated from the plasma of the South American rattlesnake (Crotalus durissus terrificus). Previous biochemical and biophysical studies demonstrate an interaction of CNF with Crotoxin (CTX), the main toxic component in the venom of these snakes. CTX promotes the blockade of neuromuscular transmission by a sum of neurotoxic and myotoxic activities. However, the ability of CNF to inhibit these activities has not been shown until the present study. We performed a myographic study to compare the neuromuscular effects of CTX and the mixture CTX plus CNF in mice phrenic nerve-diaphragm muscle preparations. CTX (5 μg/mL) alone, or pre-incubated with CNF (5, 20 or 50 μg/mL) for 15 min was added to the preparations and maintained throughout the experimentation period. Myotoxicity was assessed by light microscopic analysis of diaphragm muscle after myographic study. CTX (5 μg/mL) blocked both indirectly and directly evoked twitches in neuromuscular preparations. In addition, CTX induced histological alterations in diaphragm muscle. Pre-incubation with CNF (50 μg/mL) abolished both the muscle-paralyzing and muscle-damaging activities of CTX. Therefore, the present study confirms, through functional studies, the antiophidic potential of CNF.
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Saavedra SL, Acosta G, Ávila L, Giudicessi SL, Camperi SA, Albericio F, Cascone O, Martínez Ceron MC. Use of a phosphopeptide as a ligand to purify phospholipase A 2 from the venom of Crotalus durisuss terrificus by affinity chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1146:122070. [PMID: 32361466 DOI: 10.1016/j.jchromb.2020.122070] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 03/06/2020] [Accepted: 03/14/2020] [Indexed: 12/19/2022]
Abstract
The venom of Crotalus durissus terrificus (Cdt) is a source of a wide variety of toxins, some of them with interesting pharmacological applications. Of these toxins, the phospholipase A2 (PLA2) subunit of crotoxin (Ctx) has been studied for its potential as an antiviral and antibacterial agent. Peptides have proven useful ligands for the purification of numerous molecules, including antibodies, toxins, enzymes and other proteins. Here, we sought to use a phosphopeptide (P-Lys) as a ligand for PLA2 purification. P-Lys was synthesized in solid phase on Rink-Amide-ChemMatrix resin, immobilized on NHS-agarose, and then evaluated as a chromatographic matrix. Under the best conditions, total protein adsorption reached 39% and only the eluate fraction presented PLA2 activity. Analysis of the eluate by SDS-PAGE showed three bands, one corresponding to the molecular weight of PLA2 (14 kDa). Said bands were analyzed by mass spectrometry and identified as PLA2 and its multimers. The final product showed a purity of over 90%. In addition, slightly changing the process conditions also allowed the isolation of crotamine.
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Affiliation(s)
- Soledad L Saavedra
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Biotecnología, Junín 956, 1113 Buenos Aires, Argentina; CONICET-Universidad de Buenos Aires, Instituto de Nanobiotecnología (NANOBIOTEC), Junín 956, 1113 Buenos Aires, Argentina
| | - Gerardo Acosta
- Department of Organic Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain; CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, University of Barcelona, 08028 Barcelona, Spain
| | - Lucía Ávila
- Instituto Nacional de Producción de Biológicos, ANLIS Malbrán, Av. Vélez Sársfield 563, 1282 Buenos Aires, Argentina
| | - Silvana L Giudicessi
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Biotecnología, Junín 956, 1113 Buenos Aires, Argentina; CONICET-Universidad de Buenos Aires, Instituto de Nanobiotecnología (NANOBIOTEC), Junín 956, 1113 Buenos Aires, Argentina
| | - Silvia A Camperi
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Biotecnología, Junín 956, 1113 Buenos Aires, Argentina; CONICET-Universidad de Buenos Aires, Instituto de Nanobiotecnología (NANOBIOTEC), Junín 956, 1113 Buenos Aires, Argentina
| | - Fernando Albericio
- Department of Organic Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain; CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, University of Barcelona, 08028 Barcelona, Spain; School of Chemistry & Physics, University of Kwazulu-Natal, Durban 4001, South Africa
| | - Osvaldo Cascone
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Biotecnología, Junín 956, 1113 Buenos Aires, Argentina; CONICET-Universidad de Buenos Aires, Instituto de Nanobiotecnología (NANOBIOTEC), Junín 956, 1113 Buenos Aires, Argentina; Instituto Nacional de Producción de Biológicos, ANLIS Malbrán, Av. Vélez Sársfield 563, 1282 Buenos Aires, Argentina
| | - María C Martínez Ceron
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Biotecnología, Junín 956, 1113 Buenos Aires, Argentina; CONICET-Universidad de Buenos Aires, Instituto de Nanobiotecnología (NANOBIOTEC), Junín 956, 1113 Buenos Aires, Argentina.
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Endogenous phospholipase A 2 inhibitors in snakes: a brief overview. J Venom Anim Toxins Incl Trop Dis 2016; 22:37. [PMID: 28031735 PMCID: PMC5175389 DOI: 10.1186/s40409-016-0092-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 11/30/2016] [Indexed: 11/29/2022] Open
Abstract
The blood plasma of numerous snake species naturally comprises endogenous phospholipase A2 inhibitors, which primarily neutralize toxic phospholipases A2 that may eventually reach their circulation. This inhibitor type is generally known as snake blood phospholipase A2 inhibitors (sbPLIs). Most, if not all sbPLIs are oligomeric glycosylated proteins, although the carbohydrate moiety may not be essential for PLA2 inhibition in every case. The presently known sbPLIs belong to one of three structural classes – namely sbαPLI, sbβPLI or sbγPLI – depending on the presence of characteristic C-type lectin-like domains, leucine-rich repeats or three-finger motifs, respectively. Currently, the most numerous inhibitors described in the literature are sbαPLIs and sbγPLIs, whereas sbβPLIs are rare. When the target PLA2 is a Lys49 homolog or an Asp49 myotoxin, the sbPLI is denominated a myotoxin inhibitor protein (MIP). In this brief overview, the most relevant data on sbPLIs will be presented. Representative examples of sbαPLIs and sbγPLIs from two Old World – Gloydius brevicaudus and Malayopython reticulatus – and two New World – Bothrops alternatus and Crotalus durissus terrificus – snake species will be emphasized.
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Fortes-Dias CL, Ortolani PL, Fernandes CAH, Lobo KR, Melo LAD, Borges MH, Pazin WM, Oliveira Neto MD, Fernandez RM, Fontes MRM. Insights on the structure of native CNF, an endogenous phospholipase A2 inhibitor from Crotalus durissus terrificus, the South American rattlesnake. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:1569-79. [DOI: 10.1016/j.bbapap.2014.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 04/28/2014] [Accepted: 05/01/2014] [Indexed: 10/25/2022]
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Thwin M, Samy RP, Satyanarayanajois SD, Gopalakrishnakone P. Venom neutralization by purified bioactive molecules: Synthetic peptide derivatives of the endogenous PLA2 inhibitory protein PIP (a mini-review). Toxicon 2010; 56:1275-83. [DOI: 10.1016/j.toxicon.2009.12.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Revised: 12/17/2009] [Accepted: 12/21/2009] [Indexed: 01/06/2023]
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Sampaio SC, Hyslop S, Fontes MR, Prado-Franceschi J, Zambelli VO, Magro AJ, Brigatte P, Gutierrez VP, Cury Y. Crotoxin: Novel activities for a classic β-neurotoxin. Toxicon 2010; 55:1045-60. [DOI: 10.1016/j.toxicon.2010.01.011] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 12/17/2009] [Accepted: 01/09/2010] [Indexed: 10/19/2022]
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Fortes-Dias CL, Santos RMMD, Magro AJ, Fontes MRDM, Chávez-Olórtegui C, Granier C. Identification of continuous interaction sites in PLA2-based protein complexes by peptide arrays. Biochimie 2009; 91:1482-92. [DOI: 10.1016/j.biochi.2009.08.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2009] [Accepted: 08/27/2009] [Indexed: 10/20/2022]
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Shirai R, Toriba M, Hayashi K, Ikeda K, Inoue S. Identification and characterization of phospholipase A2 inhibitors from the serum of the Japanese rat snake, Elaphe climacophora. Toxicon 2009; 53:685-92. [PMID: 19673083 DOI: 10.1016/j.toxicon.2009.02.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two distinct phospholipase A2 (PLA2) inhibitory proteins (PLIs) were purified from the serum of the Japanese rat snake, Elaphe climacophora. The 150-kDa inhibitor, a trimer of a 50-kDa subunit, specifically inhibited the basic PLA2 purified from the venom of Gloydius brevicaudus, whereas the 120-kDa one composed of two distinct 25-kDa subunits. A and B, inhibited both the acidic and basic PLA2s of G. brevicaudus. On the basis of their amino acid sequences, these inhibitors were assigned as PLI beta and PLI gamma, respectively. A PLI alpha homolog (PLI alpha-like protein; PLI alpha-LP) having an apparent molecular weight of 50-kDa and composed of 15-kDa subunits was also purified from the E. climacophora serum. This homolog was immunoreactive with antibody raised against the G. brevicaudus PLI alpha, but lacked in the inhibitory activity toward the acidic and basic PLA2s. The cDNAs encoding PLI alpha-LP, PLI beta, PLI gamma-A, and PLI gamma-B were cloned from liver RNA, and their nucleotide sequences were compared with those of other venomous and non-venomous snakes.
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Affiliation(s)
- Ryoichi Shirai
- Laboratory of Biochemistry, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
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Nonaka PN, Amorim CF, Paneque Peres AC, E Silva CAM, Zamuner SR, Ribeiro W, Cogo JC, Vieira RP, Dolhnikoff M, de Oliveira LVF. Pulmonary mechanic and lung histology injury induced by Crotalus durissus terrificus snake venom. Toxicon 2008; 51:1158-66. [PMID: 18457854 DOI: 10.1016/j.toxicon.2008.02.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Revised: 12/24/2007] [Accepted: 02/01/2008] [Indexed: 10/22/2022]
Abstract
In the present work we investigated the effects of Crotalus durissus terrificus venom (CdtV) on the pulmonary mechanic events [static and dynamic elastance, resistive (DeltaP1) and viscoelastic pressures (DeltaP2)] and histology after intramuscular injection of saline solution (control) or venom (0.6 microg/g). The static and dynamic elastance values were increased significantly after 3 h of venom inoculation, but were reduced at control values in the other periods studied. The DeltaP1 values that correspond to the resistive properties of lung tissue presented a significant increase after 6h of CdtV injection, reducing to basal levels 12h after the venom injection. In DeltaP2 analysis, correspondent to viscoelastic components, an increase occurred 12 h after the venom injection, returning to control values at 24 h. CdtV also caused an increase of leukocytes recruitment (3-24 h) to the airways wall as well as to the lung parenchyma. In conclusion, C. durissus terrificus rattlesnake venom leads to lung injury which is reverted, after 24 h of inoculation.
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Affiliation(s)
- Paula Naomi Nonaka
- Laboratory of Physiology and Pharmacodynamics, Institute of Research and Development-IP&D, University of Vale do Paraiba-UNIVAP, Sao Jose dos Campos, SP, Brazil
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Sribar J, Kovacic L, Draskovic P, Faure G, Krizaj I. The first phospholipase inhibitor from the serum of Vipera ammodytes ammodytes. FEBS J 2007; 274:6055-64. [PMID: 17970753 DOI: 10.1111/j.1742-4658.2007.06127.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ammodytoxins are neurotoxic secretory phospholipase A(2) molecules, some of the most toxic components of the long-nosed viper (Vipera ammodytes ammodytes) venom. Envenomation by this and by closely related vipers is quite frequent in southern parts of Europe and serotherapy is used in the most severe cases. Because of occasional complications, alternative medical treatment of envenomation is needed. In the present study, ammodytoxin inhibitor was purified from the serum of V. a. ammodytes using two affinity procedures and a gel exclusion chromatography step. The ammodytoxin inhibitor from V. a. ammodytes serum consists of 23- and 25-kDa glycoproteins that form an oligomer, probably a tetramer, of about 100 kDa. N-terminal sequencing and immunological analysis revealed that both types of subunit are very similar to gamma-type secretory phospholipase A(2) inhibitors. The ammodytoxin inhibitor from V. a. ammodytes serum is a potent inhibitor of phospholipase activity and hence probably also the neurotoxicity of ammodytoxins. Discovery of the novel natural inhibitor of these potent secretory phospholipase A(2) toxins opens up prospects for the development of new types of small peptide inhibitors for use in regulating the physiological and pathological activities of secretory phospholipases A(2).
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Affiliation(s)
- Jernej Sribar
- Department of Molecular and Biomedical Sciences, Jozef Stefan Institute, Ljubljana, Slovenia
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