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Lopes Júnior CA, Mendes MKDA, Sousa MDS, Vieira EC, Andrade TDA, de Jesus JR. Exploring metalloproteins found in the secretion of venomous species: Biological role and therapeutical applications. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2024; 141:539-562. [PMID: 38960485 DOI: 10.1016/bs.apcsb.2024.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Several species during evolution suffered random mutations in response to various environmental factors, which resulted in the formation of venom in phylogenetically distant species. The composition of the venom of most species is poorly known. Snake venom is well characterized while most species have poorly known composition. In contrast, snake venoms are well characterized which proteins and peptides are the main active and most abundant constituents. 42 protein families have been identified, including metalloproteins known as metalloproteinases. These macromolecules are enzymes with zinc in their active site derived from the disintegrin A and metalloproteinase (ADAM) cellular family and are categorized into three classes (PI, PII and PIII) according to their domain organization. The snake venom metalloproteinases (SVMP) are cytotoxic, neurotoxic, myotoxic and/or hematotoxic with a crucial role in the defense and restraint of prey. In this scenario envenoming represents a danger to human health and has been considered a neglected disease worldwide, particularly in tropical and subtropical countries. Nevertheless, recently advances in "omics" technologies have demonstrated interesting biological activities of SVMPs such as antimicrobial, anticancer, against cardiovascular diseases and nervous system disorders. Metalloproteins have the therapeutic potential to be converted into drugs as other components of the venom have undergone this process (e.g., captopril, tirefiban and eptifibatide). So, this chapter is focused on the metalloproteins found in the secretions of venomous species, highlight some aspects such as structure, biological activity, pharmacological therapeutic potential and on.
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Affiliation(s)
- Cícero Alves Lopes Júnior
- Grupo de Estudo em Bioanalítica (GEBIO), Department of Chemistry, Federal University of Piauí-UFPI, Teresina, Piauí, Brazil.
| | | | - Michely da Silva Sousa
- Grupo de Estudo em Bioanalítica (GEBIO), Department of Chemistry, Federal University of Piauí-UFPI, Teresina, Piauí, Brazil
| | - Edivan Carvalho Vieira
- Grupo de Estudo em Bioanalítica (GEBIO), Department of Chemistry, Federal University of Piauí-UFPI, Teresina, Piauí, Brazil
| | | | - Jemmyson Romário de Jesus
- Research Laboratory in Bionanomaterials, LPbio, Department of Chemistry, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
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Oliveira CBDS, Barros EDS, de Oliveira SR, Barbosa Júnior F, Vieira Júnior GM, Lopes Júnior CA. Preliminary ionome of the parotoid gland secretion from Rhinella jimi toad. Toxicon 2023; 225:107059. [PMID: 36822515 DOI: 10.1016/j.toxicon.2023.107059] [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: 12/09/2022] [Revised: 02/13/2023] [Accepted: 02/16/2023] [Indexed: 02/23/2023]
Abstract
The cururu toad (Rhinella jimi) is an anuran belonging to the fauna of the Brazilian northeast region, which releases a secretion with toxins from your parotoid glands. Although it has some information about secondary metabolites and proteins, the elemental composition of the released secretion is unknown. Therefore, this is the first report on the ionome of the secretion of the parotoid glands from R. jimi, investigating the influences of abiotic factors such as biome, seasonality, and gender. ICP-MS was used for measurements combined with principal component analysis (PCA). A screening of the secretion sample detected 68 elements which the total concentration of 18 elements was determined. PCA revealed that biome and seasonality factors have a greater influence on the ionomic profile of parotoid secretion. The presence of toxic metals in the secretion samples indicates that the R. jimi toad can be considered a potential bioindicator. These findings may contribute to understanding the metabolism, lifestyle, and interaction of the R. jimi toad with environmental factors as well as open new perspectives to investigate the relationships of the ionome with other biomolecules, for example, metalloproteins and their physiological functions.
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Affiliation(s)
| | - Elcio Daniel Sousa Barros
- Department of Chemistry, Federal University of Piauí - UFPI, CEP: 64049-550, Teresina, Piauí, Brazil
| | - Silvana Ruella de Oliveira
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, University of São Paulo - USP, Avenida do Café s/n, Monte Alegre, CEP: 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Fernando Barbosa Júnior
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, University of São Paulo - USP, Avenida do Café s/n, Monte Alegre, CEP: 14040-903, Ribeirão Preto, São Paulo, Brazil
| | | | - Cícero Alves Lopes Júnior
- Department of Chemistry, Federal University of Piauí - UFPI, CEP: 64049-550, Teresina, Piauí, Brazil.
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O'Donohoe MA, Rosset SD, Regueira E, Haddad CF, Basso NG, Hermida GN. Comparative skin histology of neotropical odontophrynid frogs. ZOOL ANZ 2022. [DOI: 10.1016/j.jcz.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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dos Santos CV, Kerkhoff J, Tomazelli CA, Wenceslau CF, Sinhorin AP, de Jesus Rodrigues D, Carneiro FS, Bomfim GF. Vasoconstrictor and hemodynamic effects of a methanolic extract from Rhinella marina toad poison. Toxicon 2022; 218:57-65. [PMID: 36113683 PMCID: PMC9832923 DOI: 10.1016/j.toxicon.2022.08.018] [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: 05/04/2022] [Revised: 08/10/2022] [Accepted: 08/28/2022] [Indexed: 01/13/2023]
Abstract
Rhinella marina toad is abundant in Brazil. Its poison contains cardiac glycosides called bufadienolides, which are extensively investigated for their bioactivity. Our aim was to characterize the vasoactivity of Rhinella marina poison (RmP) on the aorta of male Wistar rats. For this, the RmP was first collected and processed to obtain an alcoholic extract. To determine cardiovascular effects of RmP, we performed in vivo tests by administering RmP intravenously in doses of 0.1-0.8 mg/kg. Vascular reactivity was also performed through concentration-response curves to RmP (10 ng/mL to 200 μg/mL) in aortic segments with and without endothelium. RmP induced a concentration-dependent contraction in rat aorta which was partly endothelium-mediated. Nitric oxide contributes with this response in view that incubation with L-NAME increased the contractile response. Additionally, treatment with indomethacin [cyclooxygenase, (COX) inhibitor], nifedipine (L-type voltage-gated calcium channels blocker), and BQ-123 (ETA receptors antagonist) decreased maximum response, and ketanserin (5-HT2 receptors antagonist) decreased pEC50, suggesting active participation of these pathways in the contractile response. On the other hand, apocynin (NADPH oxidase inhibitor) did not alter contractility. Incubation with prazosin (α1-adrenergic receptor antagonist) abolished the contractile response, suggesting that the RmP-induced contraction is dependent on the adrenergic pathway. In the Na+/K+ ATPase protocol, a higher Emax was observed in the RmP experimental group, suggesting that RmP potentiated Na+/K+ATPase hyperpolarizing response. When this extract was injected (i.v.) in vivo, increase in blood pressure and decrease in heart rate were observed. The results were immediate and transitory, and occurred in a dose-dependent manner. Overall, these data suggest that the poison extract of R. marina toad has an important vasoconstrictor action and subsequent vasopressor effects, and its use can be investigated to some cardiovascular disorders.
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Affiliation(s)
- Cintia Vieira dos Santos
- NUPADS – Health Education and Research Center, Institute of Health Sciences, Federal University of Mato Grosso, 78550-728, Sinop, MT, Brazil,Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, 14049-900, Ribeirão Preto, SP, Brazil
| | - Jacqueline Kerkhoff
- Institute of Natural, Humanities and Social Sciences, Federal University of Mato Grosso, 78577-267, Sinop, MT, Brazil
| | - Caroline Aparecida Tomazelli
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, 05508-000, São Paulo, SP, Brazil
| | - Camilla Ferreira Wenceslau
- Cardiovascular Translational Research Center, Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, 29209, USA
| | - Adilson Paulo Sinhorin
- Institute of Natural, Humanities and Social Sciences, Federal University of Mato Grosso, 78577-267, Sinop, MT, Brazil
| | - Domingos de Jesus Rodrigues
- Institute of Natural, Humanities and Social Sciences, Federal University of Mato Grosso, 78577-267, Sinop, MT, Brazil
| | - Fernando Silva Carneiro
- Department of Pharmacology, Ribeirao Preto Medical School, University of São Paulo, 14049-900, Ribeirão Preto, SP, Brazil
| | - Gisele Facholi Bomfim
- NUPADS – Health Education and Research Center, Institute of Health Sciences, Federal University of Mato Grosso, 78550-728, Sinop, MT, Brazil,Corresponding author. Av. Alexandre Ferronato, 1200, Setor Industrial, 78550-728, Sinop, Mato Grosso, Brazil. (G.F. Bomfim)
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Sousa Barros ED, Santos Monção Filho ED, Fonseca Pio YP, Amorim MRD, Berlinck RGS, Cássia Moura RD, Fonseca MG, Dantas C, Coelho RC, Silva GRD, Chaves MH, Vieira Júnior GM. Comparative study of composition of methanolic extracts of the paratoid gland secretions (PGS) of Rhinella jimi (cururu toad) from northeastern Brazil: Gender, seasonality and geographic occurrence. Toxicon 2022; 214:37-46. [PMID: 35562061 DOI: 10.1016/j.toxicon.2022.04.020] [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: 02/10/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 10/18/2022]
Abstract
Toads belonging to the Bufonidae family have a pair of paratoid glands that store highly toxic a biological secretion with varied chemical composition, that act as a chemical defense against microbial infections and predators. The paratoid gland secretion (PGS) of bufonids is rich in bioactive steroids, alkaloids, proteins, bufadienolides and bufotoxins. In the present investigation we performed a systematic analysis of the chemical profile of PGS obtained from the Bufonidae toad Rhinella jimi ("Cururu" toad) collected at three different regions of Piauí state, Northeastern Brazil. Our aim was to investigate the PGS variation related to the season of animals collection, geographic distribution and gender of the animals. The methanolic extracts of PGS were analyzed by UPLC-QToF-MS/MS. Principal component analysis (PCA) were applied to the data set obtained by the UPLC-QToF-MS/MS analyses. Among 23 compounds identified, dehydrobufotenine, suberoyl arginine, 3-(N-suberoyl-argininyl) telocinobufagin, 3-(N-suberoyl-argininyl) marinobufagin, telocinobufagin, marinobufagin and 3-(N-suberoyl-argininyl) bufalin were detected in all PGS. Minimal variations in the composition of paratoid secretions of R. jimi were observed related to distinct geographical and seasonal parameters. R. jimi female animals presented the most diverse chemical composition in its PGS. With this comparative study, unprecedented for the species, it was possible to observe that the secretions of the paratoid glands produced by R. jimi from different regions of the state of Piauí, at different times of the year, presented consistent chemical composition, with discrete particularities in the number and nature chemistry of its constituents.
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Affiliation(s)
- Elcio Daniel Sousa Barros
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil; Department of Teaching, Research and Extension, Federal Institute of Maranhão, Cep 65620-000, Coelho Neto, Maranhão, Brazil
| | - Evaldo Dos Santos Monção Filho
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil
| | - Yara Polianna Fonseca Pio
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil
| | - Marcelo Rodrigues de Amorim
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, Cep.13560-970, São Carlos, São Paulo, Brazil
| | - Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, Cep.13560-970, São Carlos, São Paulo, Brazil
| | - Rita de Cássia Moura
- Biology Coordination, Federal University of Piauí, Cep: 64607-670, Picos, Piauí, Brazil
| | | | - Clécio Dantas
- Laboratório de Química Computacional Inorgânica e Quimiometria - LQCINMETRIA, State University of Maranhão, Cep: 65604-380, Caxias, Maranhão, Brazil
| | - Ronaldo Cunha Coelho
- Teacher Training Department, Federal Institute of Piauí, Cep: 64000-040, Teresina, Piauí, Brazil
| | | | - Mariana Helena Chaves
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil
| | - Gerardo Magela Vieira Júnior
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil.
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Kowalski K, Marciniak P, Rychlik L. Individual variation in cardiotoxicity of parotoid secretion of the common toad, Bufo bufo, depends on body size - first results. ZOOLOGY 2020; 142:125822. [PMID: 32862084 DOI: 10.1016/j.zool.2020.125822] [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: 11/30/2019] [Revised: 04/29/2020] [Accepted: 07/14/2020] [Indexed: 12/29/2022]
Abstract
Anurans secrete a wide diversity of toxins from skin glands to defend themselves against predators and pathogens. Bufonids produce potent poison in parotoid macroglands located in the postorbital region. Parotoid secretion is a rich source of bioactive compounds with cardiotoxic, cytotoxic and hemolytic activity. Poison content and toxicity may vary between species, populations, and among conspecifics inhabiting the same area. In the present paper, we pre-analyzed the individual variation in cardiotoxicity of parotoid extract of common toads (Bufo bufo Linnaeus, 1758) and impact of body mass (BM), snout to vent length (SVL), and body condition (BC) of toad on the poison toxicity. We hypothesized that large toads produce poison with higher cardiotoxicity than smaller ones. Parotoid extract was fractionated by reverse phase chromatography, and then in vitro physiological bioassays were carried out on the semi-isolated hearts of the mealworm beetle (Tenebrio molitor Linnaeus, 1758) to determine cardiotoxicity of the whole poison and separated fractions. Generalized linear mixed models were used to determine effects of BM, SVL, and BC on the poison toxicity. We recorded significant changes in the insect heart contractility after treatment with the whole poison and separated fractions. We found an individual variation in cardiotoxicity of the parotoid extract which was explained by the body size of toad. Poison of smaller toads displayed a negative, whereas poison of larger toads positive, chronotropic effect on the heart contractility. Thus, we conclude that the effectiveness of parotoid secretion in repelling predators may vary depending on the toad individual size.
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Affiliation(s)
- Krzysztof Kowalski
- Department of Vertebrate Zoology and Ecology, Institute of Biology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Toruń, Lwowska 1, Toruń, 87-100, Poland; Department of Systematic Zoology, Institute of Environmental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, Poznań, 61-614, Poland.
| | - Paweł Marciniak
- Department of Animal Physiology and Development, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, Poznań, 61-614, Poland.
| | - Leszek Rychlik
- Department of Systematic Zoology, Institute of Environmental Biology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, Poznań, 61-614, Poland.
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