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Castro-Pinheiro C, Junior LCSP, Sanchez EF, da Silva ACR, Dwan CA, Karpiniec SS, Critchley AT, Fuly AL. Effect of Seaweed-Derived Fucoidans from Undaria pinnatifida and Fucus vesiculosus on Coagulant, Proteolytic, and Phospholipase A 2 Activities of Snake Bothrops jararaca, B. jararacussu, and B. neuwiedi Venom. Toxins (Basel) 2024; 16:188. [PMID: 38668613 PMCID: PMC11053494 DOI: 10.3390/toxins16040188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/04/2024] [Accepted: 04/09/2024] [Indexed: 04/29/2024] Open
Abstract
BACKGROUND Snakebite envenomation (SBE) causes diverse toxic effects in humans, including disability and death. Current antivenom therapies effectively prevent death but fail to block local tissue damage, leading to an increase in the severity of envenomation; thus, seeking alternative treatments is crucial. METHODS This study analyzed the potential of two fucoidan sulfated polysaccharides extracted from brown seaweeds Fucus vesiculosus (FVF) and Undaria pinnatifida (UPF) against the fibrinogen or plasma coagulation, proteolytic, and phospholipase A2 (PLA2) activities of Bothrops jararaca, B. jararacussu, and B. neuwiedi venom. The toxicity of FVF and UPF was assessed by the hemocompatibility test. RESULTS FVF and UPF did not lyse human red blood cells. FVF and UPF inhibited the proteolytic activity of Bothrops jararaca, B. jararacussu, and B. neuwiedi venom by approximately 25%, 50%, and 75%, respectively, while all venoms led to a 20% inhibition of PLA2 activity. UPF and FVF delayed plasma coagulation caused by the venoms of B. jararaca and B. neuwiedi but did not affect the activity of B. jararacussu venom. FVF and UPF blocked the coagulation of fibrinogen induced by all these Bothropic venoms. CONCLUSION FVF and UPF may be of importance as adjuvants for SBE caused by species of Bothrops, which are the most medically relevant snakebite incidents in South America, especially Brazil.
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Affiliation(s)
- Camila Castro-Pinheiro
- Department of Molecular and Cellular Biology, Federal Fluminense University, Niterói 24001-970, Rio de Janeiro, Brazil; (C.C.-P.); (L.C.S.P.J.); (A.C.R.d.S.)
| | - Luiz Carlos Simas Pereira Junior
- Department of Molecular and Cellular Biology, Federal Fluminense University, Niterói 24001-970, Rio de Janeiro, Brazil; (C.C.-P.); (L.C.S.P.J.); (A.C.R.d.S.)
| | - Eladio Flores Sanchez
- Laboratory of Biochemistry of Proteins from Animal Venoms, Research and Development Center, Ezequiel Dias Foundation, Belo Horizonte 30510-010, Minas Gerais, Brazil;
| | - Ana Cláudia Rodrigues da Silva
- Department of Molecular and Cellular Biology, Federal Fluminense University, Niterói 24001-970, Rio de Janeiro, Brazil; (C.C.-P.); (L.C.S.P.J.); (A.C.R.d.S.)
| | - Corinna A. Dwan
- Marinova Pty, Ltd., Cambridge, TAS 7170, Australia; (C.A.D.); (S.S.K.)
| | | | - Alan Trevor Critchley
- Independent Researcher, The Evangeline Trail, Highway 1, Paradise, NS B0S 1R0, Canada;
| | - Andre Lopes Fuly
- Department of Molecular and Cellular Biology, Federal Fluminense University, Niterói 24001-970, Rio de Janeiro, Brazil; (C.C.-P.); (L.C.S.P.J.); (A.C.R.d.S.)
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de Oliveira ALN, Lacerda MT, Ramos MJ, Fernandes PA. Viper Venom Phospholipase A2 Database: The Structural and Functional Anatomy of a Primary Toxin in Envenomation. Toxins (Basel) 2024; 16:71. [PMID: 38393149 PMCID: PMC10893444 DOI: 10.3390/toxins16020071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 01/04/2024] [Accepted: 01/13/2024] [Indexed: 02/25/2024] Open
Abstract
Viper venom phospholipase A2 enzymes (vvPLA2s) and phospholipase A2-like (PLA2-like) proteins are two of the principal toxins in viper venom that are responsible for the severe myotoxic and neurotoxic effects caused by snakebite envenoming, among other pathologies. As snakebite envenoming is the deadliest neglected tropical disease, a complete understanding of these proteins' properties and their mechanisms of action is urgently needed. Therefore, we created a database comprising information on the holo-form, cofactor-bound 3D structure of 217 vvPLA2 and PLA2-like proteins in their physiologic environment, as well as 79 membrane-bound viper species from 24 genera, which we have made available to the scientific community to accelerate the development of new anti-snakebite drugs. In addition, the analysis of the sequenced, 3D structure of the database proteins reveals essential aspects of the anatomy of the proteins, their toxicity mechanisms, and the conserved binding site areas that may anchor universal interspecific inhibitors. Moreover, it pinpoints hypotheses for the molecular origin of the myotoxicity of the PLA2-like proteins. Altogether, this study provides an understanding of the diversity of these toxins and how they are conserved, and it indicates how to develop broad, interspecies, efficient small-molecule inhibitors to target the toxin's many mechanisms of action.
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Affiliation(s)
| | | | | | - Pedro A. Fernandes
- Requimte-Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-000 Porto, Portugal; (A.L.N.d.O.); (M.T.L.); (M.J.R.)
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3
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Li A, Yue Y, Li R, Yu C, Wang X, Liu S, Xing R, Li P, Zhang Q, Yu H. Fucoidan may treat jellyfish dermatitis by inhibiting the inflammatory effect of jellyfish venom. Int J Biol Macromol 2023; 253:127449. [PMID: 37844814 DOI: 10.1016/j.ijbiomac.2023.127449] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 10/10/2023] [Accepted: 10/13/2023] [Indexed: 10/18/2023]
Abstract
Jellyfish dermatitis is a common medical problem caused by jellyfish stings. However, there are no targeted and effective medications for their treatment. Here, the biological activity of fucoidan for treatment of jellyfish dermatitis was investigated for the first time. 3 mg/mL Fucoidan attenuated the inflammatory effects of Nemopilema nomurai nematocyst venom (NnNV), including dermal toxicity and myotoxicity. Fucoidan may decrease the inflammatory effects of NnNV by downregulating MAPK and NF-κB pathways. This may be attributed to the inhibitory effect of fucoidan on metalloproteinases and phospholipase A2 (PLA2) in NnNV. 3 mg/mL fucoidan reduced the metalloproteinase activity in NnNV from 316.33 ± 20.84 U/mg to 177.33 ± 25.36 U/mg, while the inhibition of PLA2 activity in NnNV by 1 mg/mL fucoidan could reach 37.67 ± 3.42 %. Besides, external application of 3 mg/mL fucoidan can effectively alleviate the symptoms of jellyfish dermatitis. These observations suggest that fucoidan has considerable potential for treatment of jellyfish dermatitis and could be regarded as a novel medicine for jellyfish envenomation. This study provides new ideas for treatment of jellyfish envenomation and suggests evidence for the use of fucoidan in the treatment of jellyfish dermatitis as well as broadens the potential application of fucoidan in clinical practice.
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Affiliation(s)
- Aoyu Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yang Yue
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China
| | - Rongfeng Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Chunlin Yu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Xueqin Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Song Liu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Ronge Xing
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Pengcheng Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China
| | - Quanbin Zhang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China
| | - Huahua Yu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Center for Ocean Mega-Science, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), No. 1 Wenhai Road, Qingdao 266237, China.
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Salvador GHM, Pinto ÊKR, Ortolani PL, Fortes-Dias CL, Cavalcante WLG, Soares AM, Lomonte B, Lewin MR, Fontes MRM. Structural basis of the myotoxic inhibition of the Bothrops pirajai PrTX-I by the synthetic varespladib. Biochimie 2023; 207:1-10. [PMID: 36403756 DOI: 10.1016/j.biochi.2022.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 11/08/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
Varespladib (LY315920) is a potent inhibitor of human group IIA phospholipase A2 (PLA2) originally developed to control inflammatory cascades of diseases associated with high or dysregulated levels of endogenous PLA2. Recently, varespladib was also found to inhibit snake venom PLA2 and PLA2-like toxins. Herein, ex vivo neuromuscular blocking activity assays were used to test the inhibitory activity of varespladib. The binding affinity between varespladib and a PLA2-like toxin was quantified and compared with other potential inhibitors for this class of proteins. Crystallographic and bioinformatic studies showed that varespladib binds to PrTX-I and BthTX-I into their hydrophobic channels, similarly to other previously characterized PLA2-like myotoxins. However, a new finding is that an additional varespladib binds to the MDiS region, a particular site that is related to muscle cell disruption by these toxins. The present results further advance the characterization of the molecular interactions of varespladib with PLA2-like myotoxins and provide additional evidence for this compound as a promising inhibitor candidate for different PLA2 and PLA2-like toxins.
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Affiliation(s)
- Guilherme H M Salvador
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brazil
| | - Êmylle K R Pinto
- Departmento de Farmacologia, Instituto de Ciências Biologicas, Universidade Federal de Minas Gerais (UFMG), Brazil
| | - Paula L Ortolani
- Centro de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias (FUNED), Brazil
| | | | - Walter L G Cavalcante
- Departmento de Farmacologia, Instituto de Ciências Biologicas, Universidade Federal de Minas Gerais (UFMG), Brazil
| | - Andreimar M Soares
- Laboratório de Biotecnologia de Proteínas e Compostos Bioativos Aplicados à Saúde, LABIOPROT, Fundação Oswaldo Cruz, FIOCRUZ, unidade Rondônia e Instituto Nacional de Ciência e Tecnologia de Epidemiologia da Amazônia Ocidental, INCT EPIAMO, Porto Velho, RO, Brazil
| | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Matthew R Lewin
- Ophirex, Inc. Corte Madera, CA, 94925, USA; Center for Exploration and Travel Health, California Academy of Sciences, San Francisco, CA, 94118, USA
| | - Marcos R M Fontes
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brazil.
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Lomonte B. Lys49 myotoxins, secreted phospholipase A 2-like proteins of viperid venoms: A comprehensive review. Toxicon 2023; 224:107024. [PMID: 36632869 DOI: 10.1016/j.toxicon.2023.107024] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/06/2023] [Accepted: 01/06/2023] [Indexed: 01/11/2023]
Abstract
Muscle necrosis is a potential clinical complication of snakebite envenomings, which in severe cases can lead to functional or physical sequelae such as disability or amputation. Snake venom proteins with the ability to directly damage skeletal muscle fibers are collectively referred to as myotoxins, and include three main types: cytolysins of the "three-finger toxin" protein family expressed in many elapid venoms, the so-called "small" myotoxins found in a number of rattlesnake venoms, and the widespread secreted phospholipase A2 (sPLA2) molecules. Among the latter, protein variants that conserve the sPLA2 structure, but lack such enzymatic activity, have been increasingly found in the venoms of many viperid species. Intriguingly, these sPLA2-like proteins are able to induce muscle necrosis by a mechanism independent of phospholipid hydrolysis. They are commonly referred to as "Lys49 myotoxins" since they most often present, among other substitutions, the replacement of the otherwise invariant residue Asp49 of sPLA2s by Lys. This work comprehensively reviews the historical developments and current knowledge towards deciphering the mechanism of action of Lys49 sPLA2-like myotoxins, and points out main gaps to be filled for a better understanding of these multifaceted snake venom proteins, to hopefully lead to improved treatments for snakebites.
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Affiliation(s)
- Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, 11501, Costa Rica.
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6
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Adetunji CO, Akram M, Michael OS, Shahzad K, Ayeni AE, Hasan S, Adetunji JB, Hasan SM, Inamuddin, Olaniyan M, Muhibi MA. Polysaccharides Derived From Natural Sources: A Panacea to Health and Nutritional Challenges. POLYSACCHARIDES 2021. [DOI: 10.1002/9781119711414.ch32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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7
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Salvador GHM, Borges RJ, Lomonte B, Lewin MR, Fontes MRM. The synthetic varespladib molecule is a multi-functional inhibitor for PLA 2 and PLA 2-like ophidic toxins. Biochim Biophys Acta Gen Subj 2021; 1865:129913. [PMID: 33865953 DOI: 10.1016/j.bbagen.2021.129913] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 04/11/2021] [Accepted: 04/12/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND The treatment for snakebites is early administration of antivenom, which can be highly effective in inhibiting the systemic effects of snake venoms, but is less effective in the treatment of extra-circulatory and local effects. To complement standard-of-care treatments such as antibody-based antivenoms, natural and synthetic small molecules have been proposed for the inhibition of key venom components such as phospholipase A2 (PLA2) and PLA2-like toxins. Varespladib (compound LY315920) is a synthetic molecule developed and clinically tested aiming to block inflammatory cascades of several diseases associated with high PLA2s. Recent studies have demonstrated this molecule is able to potently inhibit snake venom catalytic PLA2 and PLA2-like toxins. METHODS In vivo and in vitro techniques were used to evaluate the inhibitory effect of varespladib against MjTX-I. X-ray crystallography was used to reveal details of the interaction between these molecules. A new methodology that combines crystallography, mass spectroscopy and phylogenetic data was used to review its primary sequence. RESULTS Varespladib was able to inhibit the myotoxic and cytotoxic effects of MjTX-I. Structural analysis revealed a particular inhibitory mechanism of MjTX-I when compared to other PLA2-like myotoxin, presenting an oligomeric-independent function. CONCLUSION Results suggest the effectiveness of varespladib for the inhibition of MjTX-I, in similarity with other PLA2 and PLA2-like toxins. GENERAL SIGNIFICANCE Varespladib appears to be a promissory molecule in the treatment of local effects led by PLA2 and PLA2-like toxins (oligomeric dependent and independent), indicating that this is a multifunctional or broadly specific inhibitor for different toxins within this superfamily.
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Affiliation(s)
- Guilherme H M Salvador
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Botucatu, SP, Brazil
| | - Rafael J Borges
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Botucatu, SP, Brazil
| | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Matthew R Lewin
- Center for Exploration and Travel Health, California Academy of Sciences, San Francisco, CA 94118, USA
| | - Marcos R M Fontes
- Departamento de Biofísica e Farmacologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Botucatu, SP, Brazil.
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Structural basis for phospholipase A 2-like toxin inhibition by the synthetic compound Varespladib (LY315920). Sci Rep 2019; 9:17203. [PMID: 31748642 PMCID: PMC6868273 DOI: 10.1038/s41598-019-53755-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 11/05/2019] [Indexed: 01/23/2023] Open
Abstract
The World Health Organization recently listed snakebite envenoming as a Neglected Tropical Disease, proposing strategies to significantly reduce the global burden of this complex pathology by 2030. In this context, effective adjuvant treatments to complement conventional antivenom therapy based on inhibitory molecules for specific venom toxins have gained renewed interest. Varespladib (LY315920) is a synthetic molecule clinically tested to block inflammatory cascades of several diseases associated with elevated levels of secreted phospholipase A2 (sPLA2). Most recently, Varespladib was tested against several whole snake venoms and isolated PLA2 toxins, demonstrating potent inhibitory activity. Herein, we describe the first structural and functional study of the complex between Varespladib and a PLA2-like snake venom toxin (MjTX-II). In vitro and in vivo experiments showed this compound’s capacity to inhibit the cytotoxic and myotoxic effects of MjTX-II from the medically important South American snake, Bothrops moojeni. Crystallographic and bioinformatics analyses revealed interactions of Varespladib with two specific regions of the toxin, suggesting inhibition occurs by physical blockage of its allosteric activation, preventing the alignment of its functional sites and, consequently, impairing its ability to disrupt membranes. Furthermore, based on the analysis of several crystallographic structures, a distinction between toxin activators and inhibitors is proposed.
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Ferreira LG, da Silva ACR, Noseda MD, Fuly AL, de Carvalho MM, Fujii MT, Sanchez EF, Carneiro J, Duarte MER. Chemical structure and snake antivenom properties of sulfated agarans obtained from Laurencia dendroidea (Ceramiales, Rhodophyta). Carbohydr Polym 2019; 218:136-144. [PMID: 31221314 DOI: 10.1016/j.carbpol.2019.04.066] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/18/2019] [Accepted: 04/18/2019] [Indexed: 11/26/2022]
Abstract
Aqueous and KCl-soluble polysaccharides were extracted from Laurencia dendroidea (Rhodomelaceae, Ceramiales) and their chemical profile was accessed by anion-exchange chromatography, chemical and spectroscopic analyses. The homogeneous agaran DHS-4 (181.3 × 103 g. mol-1, 21.3% of NaSO3) presents A units mostly 2-sulfated (18.9 mol%), nonsubstituted (15.3 mol%) and 6-O-methylated (10.1 mol%), while B units are l-sugars composed predominantly by galactose 6-sulfate precursor units (19.2 mol%) and 3,6-anhydrogalactose (13.8 mol%), besides non-precursor galactose 6-sulfate units bearing d-xylose substituents on C-3 (8.1 mol%). The crude KCl-soluble DHS agaran (20.5% of NaSO3) inhibited proteolysis and hemolysis induced by Lachesis muta and Bothrops jararaca venoms. DHS was able to inhibit up to 75% the L. muta venom hemorrhagic effect and to reduce the lethality displayed by B. jararaca venom, increasing the mice survival time up to 3 times. Therefore, this agaran has high potential to be used as an additional tool to treat snakebite envenomation.
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Affiliation(s)
- Luciana G Ferreira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | - Ana Cláudia R da Silva
- Departamento de Biologia Celular e Molecular, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
| | - Miguel D Noseda
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | - André L Fuly
- Departamento de Biologia Celular e Molecular, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.
| | - Mariana M de Carvalho
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | - Mutue T Fujii
- Instituto de Botânica, São Paulo, São Paulo, Brazil.
| | - Eladio F Sanchez
- Centro de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Belo Horizonte, Minas Gerais, Brazil.
| | - Jaqueline Carneiro
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
| | - Maria Eugênia R Duarte
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, Brazil.
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da Silva ACR, Duarte MER, Noseda MD, Ferreira LG, Cassolato JEF, Sanchez EF, Fuly AL. Potential Utilization of a Polysaccharide from the Marine Algae Gayralia oxysperma, as an Antivenom for Viperidae Snakebites. Mar Drugs 2018; 16:md16110412. [PMID: 30373238 PMCID: PMC6266287 DOI: 10.3390/md16110412] [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: 08/20/2018] [Revised: 10/18/2018] [Accepted: 10/25/2018] [Indexed: 01/08/2023] Open
Abstract
Worldwide, snakebites have serious implications for human health. The administration of antivenom is the official treatment used to reverse the toxic activities of envenomation. However, this therapy is not efficient to treat the local effects, leading to the amputation or deformity of affected limbs. As such, alternative treatments are needed. Here, we analyze the ability of a polysaccharide from the green marine alga Gayralia oxysperma (Go3) to inhibit the effects of venom from Bothrops jararaca and Lachesis muta. B. jararaca or L. muta venoms were incubated together with sulfated heterorhamnans from Go3, and the in vitro (coagulation, proteolytic, and hemolytic) and in vivo (hemorrhagic, myotoxic, edematogenic, and lethal) activities of venoms were assessed. Additionally, Go3 was injected before and after the injection of venoms, and the toxic activities were further tested. When incubated with the venoms, Go3 inhibited all activities, though results varied with different potencies. Moreover, Go3 neutralized hemorrhagic, myotoxic, and edematogenic activities when injected before or after injection with B. jararaca and L. muta venom. Go3 also blocked the coagulation of plasma in mice caused by the venoms in an ex vivo test. Therefore, Go3 has the potential to be used as antivenom for B. jararaca and L. muta bites, notably exhibiting higher efficacy on L. muta venom.
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Affiliation(s)
| | - Maria Eugenia Rabello Duarte
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Paraná 81531-980, Brazil.
| | - Miguel Daniel Noseda
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Paraná 81531-980, Brazil.
| | - Luciana Garcia Ferreira
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Paraná 81531-980, Brazil.
| | | | - Eladio Flores Sanchez
- Laboratory of Biochemistry of Proteins from Animal Venoms, Research and Development Center, Ezequiel Dias Foundation, Belo Horizonte, Minas Gerais 30510-010, Brazil.
| | - Andre Lopes Fuly
- Department of Molecular and Cellular Biology, Federal Fluminense University, Niterói, Rio de Janeiro 24020-141, Brazil.
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Bulfone TC, Samuel SP, Bickler PE, Lewin MR. Developing Small Molecule Therapeutics for the Initial and Adjunctive Treatment of Snakebite. J Trop Med 2018; 2018:4320175. [PMID: 30154870 PMCID: PMC6091453 DOI: 10.1155/2018/4320175] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 07/03/2018] [Indexed: 01/19/2023] Open
Abstract
The World Health Organization (WHO) recently added snakebite envenoming to the priority list of Neglected Tropical Diseases (NTD). It is thought that ~75% of mortality following snakebite occurs outside the hospital setting, making the temporal gap between a bite and antivenom administration a major therapeutic challenge. Small molecule therapeutics (SMTs) have been proposed as potential prereferral treatments for snakebite to help address this gap. Herein, we discuss the characteristics, potential uses, and development of SMTs as potential treatments for snakebite envenomation. We focus on SMTs that are secretory phospholipase A2 (sPLA2) inhibitors with brief exploration of other potential drug targets on venom molecules.
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Affiliation(s)
- Tommaso C. Bulfone
- California Academy of Sciences, San Francisco, 94118 CA, USA
- Ophirex, Inc., Corte Madera, 94925 CA, USA
- University of California, San Francisco, 94118 CA, USA
| | - Stephen P. Samuel
- California Academy of Sciences, San Francisco, 94118 CA, USA
- General Medicine, Queen Elizabeth Hospital, King's Lynn, PE30 4ET, Norfolk, UK
| | | | - Matthew R. Lewin
- California Academy of Sciences, San Francisco, 94118 CA, USA
- Ophirex, Inc., Corte Madera, 94925 CA, USA
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12
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Fucoidan as bio-functional molecule: Insights into the anti-inflammatory potential and associated molecular mechanisms. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.09.051] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Vieira SM, da Rocha SLG, Neves-Ferreira AGDC, Almeida RV, Perales J. Heterologous expression of the antimyotoxic protein DM64 in Pichia pastoris. PLoS Negl Trop Dis 2017; 11:e0005829. [PMID: 28759578 PMCID: PMC5552330 DOI: 10.1371/journal.pntd.0005829] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 08/10/2017] [Accepted: 07/24/2017] [Indexed: 11/18/2022] Open
Abstract
Snakebite envenomation is a neglected condition that constitutes a public health problem in tropical and subtropical countries, including Brazil. Interestingly, some animals are resistant to snake envenomation due to the presence of inhibitory glycoproteins in their serum that target toxic venom components. DM64 is an acidic glycoprotein isolated from Didelphis aurita (opossum) serum that has been characterized as an inhibitor of the myotoxicity induced by bothropic toxins bearing phospholipase A2 (PLA2) structures. This antitoxic protein can serve as an excellent starting template for the design of novel therapeutics against snakebite envenomation, particularly venom-induced local tissue damage. Therefore, the aim of this work was to produce a recombinant DM64 (rDM64) in the methylotrophic yeast Pichia pastoris and to compare its biological properties with those of native DM64. Yeast fermentation in the presence of Pefabloc, a serine protease inhibitor, stimulated cell growth (~1.5-fold), increased the rDM64 production yield approximately 10-fold and significantly reduced the susceptibility of rDM64 to proteolytic degradation. P. pastoris fermentation products were identified by mass spectrometry and Western blotting. The heterologous protein was efficiently purified from the culture medium by affinity chromatography (with immobilized PLA2 myotoxin) and/or an ion exchange column. Although both native and recombinant DM64 exhibit different glycosylation patterns, they show very similar electrophoretic mobilities after PNGase F treatment. rDM64 formed a noncovalent complex with myotoxin II (Lys49-PLA2) from Bothrops asper and displayed biological activity that was similar to that of native DM64, inhibiting the cytotoxicity of myotoxin II by 92% at a 1:1 molar ratio. Snakebite envenomation causes medical emergencies that, depending on the species responsible for the bite, involve different organs and tissues. Envenomation by snakebite is a worldwide problem, and Brazil presents a high incidence of Bothrops bites. Bothrops venoms cause pathological alterations with prominent local effects, such as edema, blistering, hemorrhage, dermonecrosis and myonecrosis, usually followed by poor tissue regeneration and permanent sequelae. Bleeding, coagulopathy, cardiovascular shock and renal failure are typical systemic effects of these venoms. The clinical treatment for snakebite envenoming is intravenous administration of the specific antivenom. However, serotherapy does not efficiently protect against local tissue damage. Additional challenges faced by classical antivenom therapy include the wide antigenic variation of venoms across species and even within the same snake species and the frequent occurrence of adverse reactions that are associated with the administration of immunobiologicals. The development of new effective toxin inhibitors based on the structure of natural antiophidic proteins is an attractive therapeutic alternative. DM64 is a myotoxin inhibitor that was isolated from opossum serum, and its expression as a recombinant protein is paramount to the characterization of its structure-function relationship, an essential step toward the development of alternative strategies to better manage bothropic snakebite envenomations.
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Affiliation(s)
- Saulo Martins Vieira
- Laboratory of Toxinology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, RJ, Brazil
- National Institute of Science and Technology on Toxins (INCTTOX), CNPq, Brasília, DF, Brazil
| | - Surza Lucia Gonçalves da Rocha
- Laboratory of Toxinology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, RJ, Brazil
- National Institute of Science and Technology on Toxins (INCTTOX), CNPq, Brasília, DF, Brazil
| | - Ana Gisele da Costa Neves-Ferreira
- Laboratory of Toxinology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, RJ, Brazil
- National Institute of Science and Technology on Toxins (INCTTOX), CNPq, Brasília, DF, Brazil
- * E-mail: (JP); (AGCNF)
| | - Rodrigo Volcan Almeida
- Laboratory of Molecular Microbiology and Proteins, Department of Biochemistry, Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Jonas Perales
- Laboratory of Toxinology, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, RJ, Brazil
- National Institute of Science and Technology on Toxins (INCTTOX), CNPq, Brasília, DF, Brazil
- * E-mail: (JP); (AGCNF)
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Arias AS, Rucavado A, Gutiérrez JM. Peptidomimetic hydroxamate metalloproteinase inhibitors abrogate local and systemic toxicity induced by Echis ocellatus (saw-scaled) snake venom. Toxicon 2017; 132:40-49. [PMID: 28400263 DOI: 10.1016/j.toxicon.2017.04.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/03/2017] [Accepted: 04/05/2017] [Indexed: 02/04/2023]
Abstract
The ability of two peptidomimetic hydroxamate metalloproteinase inhibitors, Batimastat and Marimastat, to abrogate toxic and proteinase activities of the venom of Echis ocellatus from Cameroon and Ghana was assessed. Since this venom largely relies for its toxicity on the action of zinc-dependent metalloproteinases (SVMPs), the hypothesis was raised that toxicity could be largely eliminated by using SVMP inhibitors. Both hydroxamate molecules inhibited local and pulmonary hemorrhagic, in vitro coagulant, defibrinogenating, and proteinase activities of the venoms in conditions in which venom and inhibitors were incubated prior to the test. In addition, the inhibitors prolonged the time of death of mice receiving 4 LD50s of venom by the intravenous route. Lower values of IC50 were observed for in vitro and local hemorrhagic activities than for systemic effects. When experiments were performed in conditions that simulated the actual circumstances of snakebite, i.e. by administering the inhibitor after envenoming, Batimastat completely abrogated local hemorrhage if injected immediately after venom. Moreover, it was also effective at inhibiting lethality and defibrinogenation when venom and inhibitor were injected by the intraperitoneal route. Results suggest that these, and possibly other, metalloproteinase inhibitors may become an effective adjunct therapy in envenomings by E. ocellatus when administered at the anatomic site of venom injection rapidly after the bite.
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Affiliation(s)
- Ana Silvia Arias
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Alexandra Rucavado
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - José María Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica.
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Dias RG, Sampaio SC, Sant'Anna MB, Cunha FQ, Gutiérrez JM, Lomonte B, Cury Y, Picolo G. Articular inflammation induced by an enzymatically-inactive Lys49 phospholipase A 2: activation of endogenous phospholipases contributes to the pronociceptive effect. J Venom Anim Toxins Incl Trop Dis 2017; 23:18. [PMID: 28344594 PMCID: PMC5364601 DOI: 10.1186/s40409-017-0104-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 02/24/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Arthritis is a set of inflammatory conditions that induce aching, stiffness, swelling, pain and may cause functional disability with severe consequences to the patient's lives. These are multi-mediated pathologies that cannot be effectively protected and/or treated. Therefore, the aim of this study was to establish a new model of acute arthritis, using a Lys49-PLA2 (Bothrops asper myotoxin II; MT-II) to induce articular inflammation. METHODS The articular inflammation was induced by MT-II (10 μg/joint) injection into the left tibio-tarsal or femoral-tibial-patellar joints. Cellular influx was evaluated counting total and differential cells that migrated to the joint. The plasma extravasation was determined using Evans blue dye. The edematogenic response was evaluated measuring the joint thickness using a caliper. The articular hypernociception was determined by a dorsal flexion of the tibio-tarsal joint using an electronic pressure-meter test. The mediators involved in the articular hypernociception were evaluated using receptor antagonists and enzymatic inhibitors. RESULTS Plasma extravasation in the knee joints was observed 5 and 15 min after MT-II (10 μg/joint) injection. MT-II also induced a polymorphonuclear cell influx into the femoral-tibial-patellar joints observed 8 h after its injection, a period that coincided with the peak of the hyperalgesic effect. Hyperalgesia was inhibited by the pretreatment of the animals with cyclooxygenase inhibitor indomethacin, with type-2 cyclooxygenase inhibitor celecoxib, with AACOCF3 and PACOCF3, inhibitors of cytosolic and Ca2+-independent PLA2s, respectively, with bradykinin B2 receptor antagonist HOE 140, with antibodies against TNFα, IL-1β, IL-6 and CINC-1 and with selective ET-A (BQ-123) and ET-B (BQ-788) endothelin receptors antagonists. The MT-II-induced hyperalgesia was not altered by the lipoxygenase inhibitor zileuton, by the bradykinin B1 receptor antagonist Lys-(Des-Arg9,Leu8)-bradykinin, by the histamine and serotonin antagonists promethazine and methysergide, respectively, by the nitric oxide inhibitor LNMMA and by the inhibitor of matrix 1-, 2-, 3-, 8- and 9- metalloproteinases GM6001 (Ilomastat). CONCLUSION These results demonstrated the multi-mediated characteristic of the articular inflammation induced by MT-II, which demonstrates its relevance as a model for arthritis mechanisms and treatment evaluation.
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Affiliation(s)
- Renata Gonçalves Dias
- Special Laboratory of Pain and Signaling, Butantan Institute, Av. Vital Brazil, 1500, São Paulo, SP CEP 05503-900 Brazil.,Healthy Sciences Institute, Paulista University (UNIP), São Paulo, SP Brazil
| | - Sandra Coccuzzo Sampaio
- Laboratory of Pathophysiology, Butantan Institute, São Paulo, SP Brazil.,Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP Brazil
| | - Morena Brazil Sant'Anna
- Special Laboratory of Pain and Signaling, Butantan Institute, Av. Vital Brazil, 1500, São Paulo, SP CEP 05503-900 Brazil
| | - Fernando Queiroz Cunha
- Department of Pharmacology, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP Brazil
| | - José María Gutiérrez
- Clodomiro Picado Institute, Faculty of Microbiology, University of Costa Rica, San José, Costa Rica
| | - Bruno Lomonte
- Clodomiro Picado Institute, Faculty of Microbiology, University of Costa Rica, San José, Costa Rica
| | - Yara Cury
- Special Laboratory of Pain and Signaling, Butantan Institute, Av. Vital Brazil, 1500, São Paulo, SP CEP 05503-900 Brazil
| | - Gisele Picolo
- Special Laboratory of Pain and Signaling, Butantan Institute, Av. Vital Brazil, 1500, São Paulo, SP CEP 05503-900 Brazil
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da Silva ACR, Ferreira LG, Duarte MER, Noseda MD, Sanchez EF, Fuly AL. Sulfated Galactan from Palisada flagellifera Inhibits Toxic Effects of Lachesis muta Snake Venom. Mar Drugs 2015; 13:3761-75. [PMID: 26110897 PMCID: PMC4483655 DOI: 10.3390/md13063761] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 05/20/2015] [Accepted: 05/25/2015] [Indexed: 12/21/2022] Open
Abstract
In Brazil, snakebites are a public health problem and accidents caused by Lachesis muta have the highest mortality index. Envenomation by L. muta is characterized by systemic (hypotension, bleeding and renal failure) and local effects (necrosis, pain and edema). The treatment to reverse the evolution of all the toxic effects is performed by injection of antivenom. However, such therapy does not effectively neutralize tissue damage or any other local effect, since in most cases victims delay seeking appropriate medical care. In this way, alternative therapies are in demand, and molecules from natural sources have been exhaustively tested. In this paper, we analyzed the inhibitory effect of a sulfated galactan obtained from the red seaweed Palisada flagellifera against some toxic activities of L. muta venom. Incubation of sulfated galactan with venom resulted in inhibition of hemolysis, coagulation, proteolysis, edema and hemorrhage. Neutralization of hemorrhage was also observed when the galactan was administered after or before the venom injection; thus mimicking a real in vivo situation. Moreover, the galactan blocked the edema caused by a phospholipase A2 isolated from the same venom. Therefore, the galactan from P. flagellifera may represent a promising tool to treat envenomation by L. muta as a coadjuvant for the conventional antivenom.
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Affiliation(s)
- Ana Cláudia Rodrigues da Silva
- Department of Molecular and Cellular Biology, Federal Fluminense University, CEP 24020-141 Niterói, Rio de Janeiro, Brazil.
| | - Luciana Garcia Ferreira
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, CEP 81531-980 Curitiba, Paraná, Brazil.
| | - Maria Eugênia Rabello Duarte
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, CEP 81531-980 Curitiba, Paraná, Brazil.
| | - Miguel Daniel Noseda
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, CEP 81531-980 Curitiba, Paraná, Brazil.
| | - Eladio Flores Sanchez
- Laboratory of Biochemistry of Proteins from Animal Venoms, Research and Development Center, Ezequiel Dias Foundation, CEP 30510-010 Belo Horizonte, Minas Gerais, Brazil.
| | - André Lopes Fuly
- Department of Molecular and Cellular Biology, Federal Fluminense University, CEP 24020-141 Niterói, Rio de Janeiro, Brazil.
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de Jesus Raposo MF, de Morais AMB, de Morais RMSC. Marine polysaccharides from algae with potential biomedical applications. Mar Drugs 2015; 13:2967-3028. [PMID: 25988519 PMCID: PMC4446615 DOI: 10.3390/md13052967] [Citation(s) in RCA: 320] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 04/26/2015] [Accepted: 05/04/2015] [Indexed: 02/06/2023] Open
Abstract
There is a current tendency towards bioactive natural products with applications in various industries, such as pharmaceutical, biomedical, cosmetics and food. This has put some emphasis in research on marine organisms, including macroalgae and microalgae, among others. Polysaccharides with marine origin constitute one type of these biochemical compounds that have already proved to have several important properties, such as anticoagulant and/or antithrombotic, immunomodulatory ability, antitumor and cancer preventive, antilipidaemic and hypoglycaemic, antibiotics and anti-inflammatory and antioxidant, making them promising bioactive products and biomaterials with a wide range of applications. Their properties are mainly due to their structure and physicochemical characteristics, which depend on the organism they are produced by. In the biomedical field, the polysaccharides from algae can be used in controlled drug delivery, wound management, and regenerative medicine. This review will focus on the biomedical applications of marine polysaccharides from algae.
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Affiliation(s)
- Maria Filomena de Jesus Raposo
- CBQF-Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal.
| | - Alcina Maria Bernardo de Morais
- CBQF-Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal.
| | - Rui Manuel Santos Costa de Morais
- CBQF-Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal.
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18
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Bhatia S, Sharma K, Nagpal K, Bera T. Investigation of the factors influencing the molecular weight of porphyran and its associated antifungal activity. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.bcdf.2015.03.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Monteiro-Machado M, Tomaz MA, Fonseca RJC, Strauch MA, Cons BL, Borges PA, Patrão-Neto FC, Tavares-Henriques MS, Teixeira-Cruz JM, Calil-Elias S, Cintra ACO, Martinez AMB, Mourão PAS, Melo PA. Occurrence of sulfated fucose branches in fucosylated chondroitin sulfate are essential for the polysaccharide effect preventing muscle damage induced by toxins and crude venom from Bothrops jararacussu snake. Toxicon 2015; 98:20-33. [PMID: 25702961 DOI: 10.1016/j.toxicon.2015.02.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 02/10/2015] [Accepted: 02/18/2015] [Indexed: 12/29/2022]
Abstract
Snake envenoming is an important public health problem around the world, particularly in tropics. Beyond deaths, morbidity induced by snake venoms, such as myotoxicity, is of pivotal consequence to population. Bothrops jararacussu is the main venomous snake in southeast region of Brazil, and particularly presents strong myotoxic effect. The only available therapy, antibothropic antivenom, poorly affects venom-induced myotoxicity. The aim of this study is to assess the ability of fucosylated chondroitin sulfate (fucCS), a glycosaminoglycan with anticoagulant and antithrombotic properties, and its derivatives to inhibit toxic activities of B. jararacussu crude venom and its isolated toxins, named bothropstoxins (BthTX-I and BthTX-II). The in vitro myotoxic activities induced by crude venom, by BthTX-I alone and by toxins together were abolished by fucCS. Carboxyl reduction (fucCS-CR) kept this ability whereas defucosilation (defucCS) abrogates myoprotection. We observed the same pattern in the response of these polysaccharides in antagonizing the increase in plasma creatine kinase (CK) levels, the reduction of skeletal muscle CK content and the rise of myeloperoxidase (MPO) activity induced by crude venom and isolated toxins. FucCS inhibited edematogenic activity and partially prevented the reduction of total leukocytes in blood when pre-incubated with crude venom. Furthermore, the venom procoagulant effect was completely antagonized by increasing concentrations of fucCS, although this polyanion could stop neither the tail bleeding nor the skin hemorrhage induced by Bothrops jararaca venom. The B. jararacussu phospholipase, hyaluronidase, proteolytic and collagenase activities were inhibited in vitro. The results suggest that fucCS could be able to interact with both toxins, and it is able to inhibit BthTX-II phospholipase activity. Light microscopy of extensor digitorum longus muscle (EDL) muscle showed myoprotection by fucCS, once necrotic areas, edema and inflammatory cells were all decreased as compared to venom injection alone. Altogether, data show that fucCS was able to inhibit myotoxicity and inflammation induced by B. jararacussu venom and its phospholipase toxins, BthTX-I and BthTX-II. Thus, fucosylated chondroitin sulfate is a new polyanion with potential to be used as an adjuvant in the treatment of snakebites in the future.
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Affiliation(s)
- Marcos Monteiro-Machado
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Marcelo A Tomaz
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Roberto J C Fonseca
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Marcelo A Strauch
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Bruno L Cons
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Paula A Borges
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Fernando C Patrão-Neto
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Matheus S Tavares-Henriques
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Jhonatha M Teixeira-Cruz
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Sabrina Calil-Elias
- Departamento de Farmácia e Administração Farmacêutica, Faculdade de Farmácia, UFF, Niterói, RJ, Brazil
| | - Adélia C O Cintra
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - Universidade de São Paulo, São Paulo, SP, Brazil
| | - Ana Maria B Martinez
- Programa de Pesquisa em Neurociência Básica e Clínica, Instituto de Ciências Biomédicas, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Paulo A S Mourão
- Laboratório de Tecido Conjuntivo, Hospital Universitário Clementino Fraga Filho and Programa de Glicobiologia, Instituto de Bioquímica Médica, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paulo A Melo
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas - Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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The lethality test used for estimating the potency of antivenoms against Bothrops asper snake venom: Pathophysiological mechanisms, prophylactic analgesia, and a surrogate in vitro assay. Toxicon 2015; 93:41-50. [DOI: 10.1016/j.toxicon.2014.11.223] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 10/31/2014] [Accepted: 11/05/2014] [Indexed: 11/20/2022]
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Wanderley CWS, Silva CMS, Wong DVT, Ximenes RM, Morelo DFC, Cosker F, Aragão KS, Fernandes C, Palheta-Júnior RC, Havt A, Brito GAC, Cunha FQ, Ribeiro RA, Lima-Júnior RCP. Bothrops jararacussu snake venom-induces a local inflammatory response in a prostanoid- and neutrophil-dependent manner. Toxicon 2014; 90:134-47. [PMID: 25127849 DOI: 10.1016/j.toxicon.2014.08.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 07/29/2014] [Accepted: 08/05/2014] [Indexed: 12/16/2022]
Abstract
Local tissue reactions provoked by Bothrops venoms are characterized by edema, hemorrhage, pain, and inflammation; however, the mechanisms of tissue damage vary depending upon the species of snake. Here, we investigated the mechanisms involved in the local inflammatory response induced by the Bothrops jararacussu venom (BjcuV). Female Swiss mice were injected with either saline, BjcuV (0.125-8 μg/paw) or loratadine (an H1 receptor antagonist), compound 48/80 (for mast cell depletion), capsaicin (for C-fiber desensitization), infliximab (an anti-TNF-α antibody), indomethacin (a non-specific COX inhibitor), celecoxib (a selective COX-2 inhibitor) or fucoidan (a P- and L-selectins modulator) given before BjcuV injection. Paw edema was measured by plethysmography. In addition, paw tissues were collected for the measurement of myeloperoxidase activity, TNF-α and IL-1 levels, and COX-2 immunoexpression. The direct chemotactic effect of BjcuV and the in vitro calcium dynamic in neutrophils were also investigated. BjcuV caused an edematogenic response with increased local production of TNF-α and IL-1β as well as COX-2 expression. Both edema and neutrophil migration were prevented by pretreatment with indomethacin, celecoxib or fucoidan. Furthermore, BjcuV induced a direct in vitro neutrophil chemotaxis by increasing intracellular calcium. Therefore, BjcuV induces an early onset edema dependent upon prostanoid production and neutrophil migration.
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Affiliation(s)
- C W S Wanderley
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - C M S Silva
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - D V T Wong
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - R M Ximenes
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - D F C Morelo
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Brazil
| | - F Cosker
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - K S Aragão
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - C Fernandes
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - R C Palheta-Júnior
- College of Veterinary Medicine, Federal University of Vale do São Francisco, Brazil
| | - A Havt
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - G A C Brito
- Department of Morphology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - F Q Cunha
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Brazil
| | - R A Ribeiro
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil
| | - R C P Lima-Júnior
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Brazil.
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Thomas NV, Manivasagan P, Kim SK. Potential matrix metalloproteinase inhibitors from edible marine algae: a review. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:1090-100. [PMID: 24780533 DOI: 10.1016/j.etap.2014.04.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Revised: 04/02/2014] [Accepted: 04/06/2014] [Indexed: 05/27/2023]
Abstract
Matrix metalloproteinases are endopeptidases which belong to the group of metalloproteinases that contribute for the extra-cellular matrix degradation, and several tissue remodeling processes. An imbalance in the regulation of these endopeptidases eventually leads to several severe pathological complications like cancers, cardiac, cartilage, and neurological related diseases. Hence inhibitory substances of metalloproteinases (MMPIs) could prove beneficial in the management of above specified pathological conditions. The available synthetic MMPIs that have been reported until now have few shortcomings and thus many of them could not make to the final clinical trials. Hence a growing interest among researchers on screening of MMPIs from different natural resources is evident and especially natural products from marine origin. As there has been an unparalleled contribution of several biologically active compounds from marine resources that have shown profound applications in nutraceuticals, cosmeceuticals, and pharmaceuticals, we have attempted to discuss the various MMPIs from edible sea-weeds.
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Affiliation(s)
- Noel Vinay Thomas
- Marine Biochemistry Laboratory, Department of Chemistry, Pukyong National University, Busan 608-737, Republic of Korea
| | - Panchanathan Manivasagan
- Marine Biochemistry Laboratory, Department of Chemistry, Pukyong National University, Busan 608-737, Republic of Korea
| | - Se-Kwon Kim
- Marine Biochemistry Laboratory, Department of Chemistry, Pukyong National University, Busan 608-737, Republic of Korea; Marine Bioprocess Research Center, Pukyong National University, Busan 608-737, Republic of Korea.
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Thomas NV, Kim SK. Fucoidans from marine algae as potential matrix metalloproteinase inhibitors. ADVANCES IN FOOD AND NUTRITION RESEARCH 2014; 72:177-193. [PMID: 25081083 DOI: 10.1016/b978-0-12-800269-8.00010-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Matrix metalloproteinases are endopeptidases which belong to the group of metalloproteinases that contribute for the extracellular matrix degradation and several tissue remodeling processes. An imbalance in the regulation of these endopeptidases eventually leads to several severe pathological complications like cancers, cardiac, cartilage, and neurological-related diseases. Hence, inhibitory substances of metalloproteinases (MMPIs) could prove beneficial in the management of above specified pathological conditions. The available synthetic MMPIs that have been reported until now have few shortcomings, and thus many of them could not make to the final clinical trials. Hence, a growing interest among researchers on screening of MMPIs from different natural resources is evident and especially natural products from marine origin. As there has been an unparalleled contribution of several biologically active compounds from marine resources that have shown a profound applications in nutraceuticals, cosmeceuticals, and pharmaceuticals, we have attempted to discuss the various MMPIs from edible seaweeds.
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Affiliation(s)
- Noel Vinay Thomas
- Marine Biochemistry Laboratory, Department of Chemistry, Pukyong National University, Busan, South Korea
| | - Se-Kwon Kim
- Department of Marine-bio Convergence Science, Specialized Graduate School Science and Technology Convergence, Marine Bioprocess Research Center, Pukyong National University, Busan, South Korea.
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Mhadhebi L, Dellai A, Clary-Laroche A, Said RB, Robert J, Bouraoui A. Anti-Inflammatory and Antiproliferative Activities of Organic Fractions from the Mediterranean Brown Seaweed, Cystoseira Compressa. Drug Dev Res 2012. [DOI: 10.1002/ddr.20491] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Afef Dellai
- Unité de Recherche des Substances Actives Marines (URSAM); Laboratoire de Pharmacologie. Faculté de Pharmacie; Monastir; Tunisia
| | - Audrey Clary-Laroche
- Laboratoire de Pharmacologie des Agents Anticancéreux (INSERM); Institut Bergonié; Bordeaux; France
| | - Rafik Ben Said
- Institut National des Sciences et Technologies de la Mer (INSTM); Tunis; Tunisia
| | - Jacques Robert
- Laboratoire de Pharmacologie des Agents Anticancéreux (INSERM); Institut Bergonié; Bordeaux; France
| | - Abderrahman Bouraoui
- Unité de Recherche des Substances Actives Marines (URSAM); Laboratoire de Pharmacologie. Faculté de Pharmacie; Monastir; Tunisia
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Morya VK, Kim J, Kim EK. Algal fucoidan: structural and size-dependent bioactivities and their perspectives. Appl Microbiol Biotechnol 2012; 93:71-82. [PMID: 22089385 DOI: 10.1007/s00253-011-3666-8] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 10/03/2011] [Accepted: 10/22/2011] [Indexed: 11/26/2022]
Abstract
Fucoidan is a complex-sulfated polysaccharide distributed in various marine organisms, and the brown algae are reported as the major producer. The fucoidan is important for their high bioactive properties, like antibacterial, anticoagulant, antiviral, anti-tumor, etc., and many more to be explored. There is a strong archival support for the bioactivity and promising properties of this molecule, which creates a hope for this molecule as future drug against thrombosis and some kind of cancers. Reports other than the above bioactive properties have also been a matter of interest for the design of signal or enzyme-arrested new class of drugs. In the past three decades, the research on isolation, molecular characterization, and screening of biological applications has significantly increased. One major issue associated with this molecule is the higher size and seasonal variation in their chemical composition; to resolve the issue and maintain its bioactivity, a prioritized and literal hydrolysis process is required to be developed. Here, in this mini-review, we have tried to summarize the algal fucoidan research and the bioactivities influenced by their molecular size.
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Affiliation(s)
- V K Morya
- National Research Laboratory of Bioactive Materials, Department of Biological Engineering, Inha University, Incheon, South Korea
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Mhadhebi L, Laroche-Clary A, Robert J, Bouraoui A. Antioxidant, anti-inflammatory, and antiproliferative activities of organic fractions from the Mediterranean brown seaweed Cystoseira sedoides. Can J Physiol Pharmacol 2011; 89:911-21. [DOI: 10.1139/y11-093] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present study was conducted to evaluate the antioxidant, anti-inflammatory, and antiproliferative activities of organic fractions from Cystoseira sedoides (Desfontaines) C. Agardh . Various fractions of C. sedoides (chloroform (F-CHCl3), ethyl acetate (F-AcOEt), and methanol (F-MeOH)) were screened for total phenol content, as well as antioxidant activity, using the stable radical 1,1-diphenyl-2-picrylhydrazyl (DPPH), and assays for determining the reducing power of these fractions. The anti-inflammatory properties of these fractions were assessed using the carrageenan-induced rat paw oedema model. The antiproliferative activity of C. sedoides fractions was evaluated on normal Madin–Darby canine kiney (MDCK), and fibroblast cells and on cancer cell lines (A549, MCF7, and HCT15), using the ability of the cells to metabolically reduce 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) formazan dyes. The F-CHCl3 and F-AcOEt fractions showed significant total phenolic content at 55.09 and 61.30 mg gallic-acid equivalent/g dried sample, respectively. Using the DPPH method, the F-CHCl3 and the F-AcOEt fractions exhibited the strongest radical scavenging activity, with IC50 120 µg/mL for F-CHCl3 and 121 µg/mL for F-AcOEt, which approaches the activity of the powerful antioxidant standard, Trolox (IC50 = 90 µg/mL). The reducing power of the samples was in the following order: F-AcOEt > F-CHCl3 > F-MeOH fraction. The F-CHCl3 and F-AcOEt fractions of C. sedoides tested at different doses (25 and 50 mg/kg, intraperitoneally (i.p)), exhibited a dose-dependent reduction of rat paw oedema. The percentage of inhibition of oedema, 3 h after carrageenan injection, ranged from 67.71% to 73.49% and from 67.74% to 74.58%, for F-CHCl3 and F-AcOEt, respectively. Their effects are comparable with that of lysine acetylsalicylate (300 mg/kg body mass; i.p.), which is used as a reference drug with the ability to inhibit oedema by 66.14%. Our results revealed that the F-CHCl3 and F-AcOEt fractions from C. sedoides showed important antiproliferative properties towards all of the cancer cell lines studied here, as judged by their IC50 values, which ranged from 52.6 to 66.5 µg/mL for A549; 22.4 to 70.2 µg/mL for MCF7, and 250.6 to 255.3 µg/mL for HCT15. Moreover, no visible destruction or alteration of normal cells was observed, even at 500 µg/mL F-CHCl3 or F-AcOEt. These results suggest that C. sedoides fractions might be used as a potential source of natural antioxidant, anti-inflammatory, and antitumor agents. The purification and determination of the chemical structures of the compounds in these active fractions are under investigation. The results could provide a compound(s) with a promising role in future medicines and nutrition, when used either as a drug or a dietary supplement.
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Affiliation(s)
- Lamia Mhadhebi
- Unité de Recherche des Substances Actives Marines (URSAM), Laboratoire de Pharmacologie, Faculté de Pharmacie de Monastir, Avenue Avicenne, 5000 Monastir, Tunisie
- Laboratoire de Pharmacologie des Médicament Anticancéreux, Université Victor Segalen Bordeaux 2, Institut Bergonié, 229 Cours de l’Argonne, 33076 Bordeaux CEDEX, France
| | - Audrey Laroche-Clary
- Laboratoire de Pharmacologie des Médicament Anticancéreux, Université Victor Segalen Bordeaux 2, Institut Bergonié, 229 Cours de l’Argonne, 33076 Bordeaux CEDEX, France
| | - Jacque Robert
- Laboratoire de Pharmacologie des Médicament Anticancéreux, Université Victor Segalen Bordeaux 2, Institut Bergonié, 229 Cours de l’Argonne, 33076 Bordeaux CEDEX, France
| | - Abderrahman Bouraoui
- Unité de Recherche des Substances Actives Marines (URSAM), Laboratoire de Pharmacologie, Faculté de Pharmacie de Monastir, Avenue Avicenne, 5000 Monastir, Tunisie
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Comparative study of the cytolytic activity of snake venoms from African spitting cobras (Naja spp., Elapidae) and its neutralization by a polyspecific antivenom. Toxicon 2011; 58:558-64. [DOI: 10.1016/j.toxicon.2011.08.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Revised: 08/26/2011] [Accepted: 08/30/2011] [Indexed: 10/17/2022]
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Therapies from fucoidan; multifunctional marine polymers. Mar Drugs 2011; 9:1731-1760. [PMID: 22072995 PMCID: PMC3210604 DOI: 10.3390/md9101731] [Citation(s) in RCA: 215] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 09/22/2011] [Accepted: 09/26/2011] [Indexed: 12/22/2022] Open
Abstract
Published research on fucoidans increased three fold between 2000 and 2010. These algal derived marine carbohydrate polymers present numerous valuable bioactivities. This review discusses the role for fucoidan in the control of acute and chronic inflammation via selectin blockade, enzyme inhibition and inhibiting the complement cascade. The recent data on toxicology and uptake of fucoidan is detailed together with a discussion on the comparative activities of fractions of fucoidan from different sources. Recent in vivo, in vitro and clinical research related to diverse clinical needs is discussed. Targets include osteoarthritis, kidney and liver disease, neglected infectious diseases, hemopoietic stem cell modulation, protection from radiation damage and treatments for snake envenomation. In recent years, the production of well characterized reproducible fucoidan fractions on a commercial scale has become possible making therapies from fucoidan a realizable goal.
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Harrison RA, Cook DA, Renjifo C, Casewell NR, Currier RB, Wagstaff SC. Research strategies to improve snakebite treatment: challenges and progress. J Proteomics 2011; 74:1768-80. [PMID: 21723969 DOI: 10.1016/j.jprot.2011.06.019] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Accepted: 06/20/2011] [Indexed: 11/17/2022]
Abstract
Antivenom is an effective treatment of snakebite but, because of the complex interplay of fiscal, epidemiological, therapeutic efficacy and safety issues, the mortality of snakebite remains unacceptably high. Efficiently combating this high level of preventable death amongst the world's most disadvantaged communities requires the globally-coordinated action of multiple intervention programmes. This is the overall objective of the Global Snakebite Initiative. This paper describes the challenges facing the research community to develop snakebite treatments that are more efficacious, safe and affordable than current therapy.
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Affiliation(s)
- Robert A Harrison
- Alistair Reid Venom Research Unit, Liverpool School of Tropical Medicine, Liverpool, UK.
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Myers SP, O'Connor J, Fitton JH, Brooks L, Rolfe M, Connellan P, Wohlmuth H, Cheras PA, Morris C. A combined phase I and II open label study on the effects of a seaweed extract nutrient complex on osteoarthritis. Biologics 2010; 4:33-44. [PMID: 20376172 PMCID: PMC2846142 DOI: 10.2147/btt.s8354] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Indexed: 11/23/2022]
Abstract
Background: Isolated fucoidans from brown marine algae have been shown to have a range of anti-inflammatory effects. Purpose: This present study tested a Maritech® extract formulation, containing a blend of extracts from three different species of brown algae, plus nutrients in an open label combined phase I and II pilot scale study to determine both acute safety and efficacy in osteoarthritis of the knee. Patients and methods: Participants (n = 12, five females [mean age, 62 ± 11.06 years] and seven males [mean age, 57.14 ± 9.20 years]) with a confirmed diagnosis of osteoarthritis of the knee were randomized to either 100 mg (n = 5) or 1000 mg (n = 7) of a Maritech® extract formulation per day. The formulation contained Maritech® seaweed extract containing Fucus vesiculosis (85% w/w), Macrocystis pyrifera (10% w/w) and Laminaria japonica (5% w/w) plus vitamin B6, zinc and manganese. Primary outcome was the average comprehensive arthritis test (COAT) score which is comprised of four sub-scales: pain, stiffness, difficulty with physical activity and overall symptom severity measured weekly. Safety measures included full blood count, serum lipids, liver function tests, urea, creatinine and electrolytes determined at baseline and week 12. All adverse events were recorded. Results: Eleven participants completed 12 weeks and one completed 10 weeks of the study. Using a multilevel linear model, the average COAT score was reduced by 18% for the 100 mg treatment and 52% for the 1000 mg dose at the end of the study. There was a clear dose response effect seen between the two treatments (P ≤ 0.0005) on the average COAT score and each of the four COAT subscales (pain, stiffness, difficulty with physical activity and overall symptom severity) (P ≤ 0.05). The preparation was well tolerated and the few adverse events were unlikely to be related to the study medication. There were no changes in blood parameters measured over the course of the study with the exception of an increase in serum albumin which was not clinically significant. Conclusion: The seaweed extract nutrient complex when taken orally over twelve weeks decreased the symptoms of osteoarthritis in a dose-dependent manner. It was demonstrated to be safe to use over the study period at the doses tested. The efficacy of the preparation now needs to be demonstrated in a phase III randomized controlled trial (RCT). Australian and New Zealand Clinical Trials Register: ACTRN12607000229471.
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Gutiérrez JM, Rucavado A, Escalante T, Lomonte B, Angulo Y, Fox JW. Tissue pathology induced by snake venoms: How to understand a complex pattern of alterations from a systems biology perspective? Toxicon 2010; 55:166-70. [DOI: 10.1016/j.toxicon.2009.08.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Accepted: 08/14/2009] [Indexed: 11/15/2022]
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Neutralization of Bothrops asper venom by antibodies, natural products and synthetic drugs: Contributions to understanding snakebite envenomings and their treatment. Toxicon 2009; 54:1012-28. [DOI: 10.1016/j.toxicon.2009.03.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Revised: 03/10/2009] [Accepted: 03/17/2009] [Indexed: 11/24/2022]
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Holtkamp AD, Kelly S, Ulber R, Lang S. Fucoidans and fucoidanases--focus on techniques for molecular structure elucidation and modification of marine polysaccharides. Appl Microbiol Biotechnol 2009; 82:1-11. [PMID: 19043701 DOI: 10.1007/s00253-008-1790-x] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2008] [Revised: 11/07/2008] [Accepted: 11/08/2008] [Indexed: 01/12/2023]
Abstract
The research field of fucoidans (sulphated polysaccharides from algae) and fucoidanases was strongly developing in recent years. Several different fucoidans and a few fucoidan-degrading enzymes were isolated and characterised. A high potential is seen in the medical exploitation of the fucoidans and its degradation products. This review gives an overview about the research of the last 5 years concerning fucoidan characterisation and application as well as enzyme detection, characterisation and production.
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Affiliation(s)
- Andrea Désirée Holtkamp
- Institute of Biochemistry and Biotechnology, Department of Biotechnology, Technical University of Braunschweig, Spielmannstr. 7, Braunschweig, Germany
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Mora J, Mora R, Lomonte B, Gutiérrez JM. Effects of Bothrops asper snake venom on lymphatic vessels: insights into a hidden aspect of envenomation. PLoS Negl Trop Dis 2008; 2:e318. [PMID: 18923712 PMCID: PMC2563035 DOI: 10.1371/journal.pntd.0000318] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2008] [Accepted: 09/16/2008] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Envenomations by the snake Bothrops asper represent a serious medical problem in Central America and parts of South America. These envenomations concur with drastic local tissue pathology, including a prominent edema. Since lymph flow plays a role in the maintenance of tissue fluid balance, the effect of B. asper venom on collecting lymphatic vessels was studied. METHODOLOGY/PRINCIPAL FINDINGS B. asper venom was applied to mouse mesentery, and the effects were studied using an intravital microscopy methodology coupled with an image analysis program. B. asper venom induced a dose-dependent contraction of collecting lymphatic vessels, resulting in a reduction of their lumen and in a halting of lymph flow. The effect was reproduced by a myotoxic phospholipase A(2) (PLA(2)) homologue isolated from this venom, but not by a hemorrhagic metalloproteinase or a coagulant thrombin-like serine proteinase. In agreement with this, treatment of the venom with fucoidan, a myotoxin inhibitor, abrogated the effect, whereas no inhibition was observed after incubation with the peptidomimetic metalloproteinase inhibitor Batimastat. Moreover, fucoidan significantly reduced venom-induced footpad edema. The myotoxic PLA(2) homologue, known to induce skeletal muscle necrosis, was able to induce cytotoxicity in smooth muscle cells in culture and to promote an increment in the permeability to propidium iodide in these cells. CONCLUSIONS/SIGNIFICANCE Our observations indicate that B. asper venom affects collecting lymphatic vessels through the action of myotoxic PLA(2)s on the smooth muscle of these vessels, inducing cell contraction and irreversible cell damage. This activity may play an important role in the pathogenesis of the pronounced local edema characteristic of viperid snakebite envenomation, as well as in the systemic biodistribution of the venom, thus representing a potential therapeutical target in these envenomations.
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Affiliation(s)
- Javier Mora
- Departamento de Parasitología, Universidad de Costa Rica, San José, Costa Rica
| | - Rodrigo Mora
- Departamento de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Bruno Lomonte
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - José María Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
- * E-mail:
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Azofeifa K, Angulo Y, Lomonte B. Ability of fucoidan to prevent muscle necrosis induced by snake venom myotoxins: comparison of high- and low-molecular weight fractions. Toxicon 2007; 51:373-80. [PMID: 18061642 DOI: 10.1016/j.toxicon.2007.10.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Revised: 10/18/2007] [Accepted: 10/19/2007] [Indexed: 10/22/2022]
Abstract
Fucoidan, a natural polysaccharide extracted from brown seaweed, inhibits the myotoxic phospholipases A(2) present in the venoms of crotalid snakes. This study evaluated the influence of molecular weight on the ability of fucoidan to prevent muscle necrosis when rapidly administered after injection of a purified myotoxin or crude venom of Bothrops asper, in a mouse model. It was hypothesized that smaller fucoidan fragments, being of higher diffusibility to tissues, might have a better neutralizing efficiency in vivo. Fucoidan was subjected to acid hydrolysis to obtain low-molecular weight fragments (F(L)), or to gel filtration to isolate its high-molecular weight fraction (F(H)). These two preparations were standardized to the same neutralizing potency by preincubation assays, and subsequently tested in vivo, by independent administration assays. Local i.m. administration of either F(H) or F(L), immediately after i.m. injection of myotoxin II, prevented nearly 50% of muscle necrosis, albeit with no difference between the two preparations. Muscle necrosis was not reduced when either F(H) or F(L) was administered by i.v. route, immediately after i.m. toxin injection. When tested against crude venom, which contains several myotoxin isoforms, the immediate in situ i.m. injection of F(H) still inhibited myonecrosis by nearly one-half of the effect recorded in the untreated group, whereas F(L) was ineffective. It is concluded that, in this model, and in contrast to expectations, the use of smaller fucoidan fragments to prevent muscle damage induced by snake venom myotoxins is not advantageous, when compared with larger fucoidan molecules.
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Affiliation(s)
- Karol Azofeifa
- Facultad de Microbiología, Instituto Clodomiro Picado, Universidad de Costa Rica, San José 2060, Costa Rica
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A simple and efficient method to label l-fucose. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.07.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Abstract
Envenoming resulting from snake bites is an important public health hazard in many regions of the world, yet public health authorities have given little attention to the problem.
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Affiliation(s)
- José María Gutiérrez
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica.
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Liao JW, Kang JJ, Jeng CR, Chang SK, Kuo MJ, Wang SC, Liu MRS, Pang VF. Cartap-induced cytotoxicity in mouse C2C12 myoblast cell line and the roles of calcium ion and oxidative stress on the toxic effects. Toxicology 2006; 219:73-84. [PMID: 16325978 DOI: 10.1016/j.tox.2005.11.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2005] [Revised: 11/04/2005] [Accepted: 11/04/2005] [Indexed: 11/23/2022]
Abstract
Our previous study has demonstrated that instead of neuromuscular blockage cartap, an organonitrogen insecticide, could cause a marked irreversible Ca2+-dependent contracture in both isolated mouse and rabbit phrenic nerve-diaphragms. We further examined the potential of direct myocytotoxicity of cartap and the possible roles of calcium ion and oxidative stress on cartap-induced muscle cell injury using the mouse myoblast cell line, C2C12. Cartap exerted a dose- and time-dependent cytotoxic effect in C2C12 cells measured by MTT colorimetric assay and trypan blue dye exclusion. The extracellular activities of both creatine kinase (CK) and lactate dehydrogenase (LDH) were elevated in the cartap-treated groups at or greater than 100 microM. The isoenzymatic profiles showed that the elevations were mainly due to CK-3, LDH-3, and LDH-4. Following the addition of 0.5-2.5mM EGTA, a Ca2+ chelator, or 30-100 microM verapamil, an L-type Ca2+ channel blocker, the cartap-induced reduction in MTT metabolic rate of C2C12 cells was significantly restored in a dose-dependent manner in both EGTA and verapamil-treated cells. Furthermore, EGTA could significantly reduce the cartap-induced elevation in the levels of total extracellular CK and LDH activities. Additionally, cartap significantly increased the level of endogenous reactive oxygen species (ROS) in C2C12 cells in a dose- and time-dependent manner. The cartap-induced ROS generation could be significantly inhibited by antioxidants, including Vitamins C and E, catalase, and superoxide dismutase, with catalase the most effective. EGTA could significantly inhibit cartap-induced ROS generation in a dose-dependent manner. The results suggested that cartap could induce ROS generation in C2C12 cells via a Ca2+-dependent mechanism resulting in subsequent cytotoxicity, at least partially, to C2C12 cells. It is speculated that both Ca2+ and Ca2+-induced ROS may also play the central role on the myogenic contracture and myofiber injury of the diaphragm leading to respiratory failure and subsequent death in rabbits exposed ocularly to cartap.
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Affiliation(s)
- Jiunn-Wang Liao
- Graduate Institute of Veterinary Pathology, National Chung Hsing University, Taichung, 402 Taiwan, ROC.
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Jhamandas JH, Wie MB, Harris K, MacTavish D, Kar S. Fucoidan inhibits cellular and neurotoxic effects of β-amyloid (Aβ) in rat cholinergic basal forebrain neurons. Eur J Neurosci 2005; 21:2649-59. [PMID: 15926913 DOI: 10.1111/j.1460-9568.2005.04111.x] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The deposition of beta-amyloid protein (A beta), a 39-43 amino acid peptide, in the brain and a loss of cholinergic neurons in the basal forebrain are pathological hallmarks of Alzheimer's disease (AD). Seaweeds consumed in Asia contain Fucoidan, a sulfated polysaccharide. Fucoidan has been known to exhibit various biological actions, such as an anti-inflammatory and antioxidant action. In this study, using whole-cell patch clamp recordings we examined the effects of Fucoidan on A beta-induced whole-cell currents in acutely dissociated rat basal forebrain neurons. We further investigated whether Fucoidan is capable of blocking A beta neurotoxicity in primary neuronal cultures. In dissociated cells, bath application of A beta(25-35) (1 microM) caused a reduction of the whole-cell currents by 16%. Fucoidan, in a dose-dependent manner, blocks the A beta(25-35) reduction of whole-cell currents. Exposure of A beta(25-35) (20 microM) or A beta(1-42) (20 microM) to rat cholinergic basal forebrain cultures for 48 h resulted in 40-60% neuronal death, which was significantly decreased by pretreatment of cultures with Fucoidan (0.1-1.0 microM). Fucoidan also attenuated A beta-induced down-regulation of phosphorylated protein kinase C. A beta(1-42)-induced generation of reactive oxygen species was blocked by prior exposure of cultures to Fucoidan. Furthermore, A beta activation of caspases 9 and 3, which are signaling pathways implicated in apoptotic cell death, is blocked by pretreatment of cultures with Fucoidan. These results show that Fucoidan is able to block A beta-induced reduction in whole-cell currents in basal forebrain neurons and has neuroprotective effects against A beta-induced neurotoxicity in basal forebrain neuronal cultures.
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Affiliation(s)
- Jack H Jhamandas
- Division of Neurology, Department of Medicine, University of Alberta, Edmonton, Alberta T6G 2S2, Canada.
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