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Lopes-Ferreira M, Magalhães GS, Fernandez JH, Junqueira-de-Azevedo IDLM, Le Ho P, Lima C, Valente RH, Moura-da-Silva AM. Structural and biological characterization of Nattectin, a new C-type lectin from the venomous fish Thalassophryne nattereri. Biochimie 2011; 93:971-80. [DOI: 10.1016/j.biochi.2011.03.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Accepted: 03/02/2011] [Indexed: 10/18/2022]
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Morais K, Hayashi M, Bruni F, Lopes-Ferreira M, Camargo A, Ulrich H, Lameu C. Bj-PRO-5a, a natural angiotensin-converting enzyme inhibitor, promotes vasodilatation mediated by both bradykinin B2 and M1 muscarinic acetylcholine receptors. Biochem Pharmacol 2011; 81:736-42. [DOI: 10.1016/j.bcp.2010.12.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Revised: 11/12/2010] [Accepted: 12/16/2010] [Indexed: 11/24/2022]
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Conceição K, Bruni FM, Santos JM, Lopes RM, Marques EE, Fernandez JH, Lopes-Ferreira M. The action of fish peptide Orpotrin analogs on microcirculation. J Pept Sci 2011; 17:192-9. [PMID: 21308875 DOI: 10.1002/psc.1311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Revised: 08/30/2010] [Accepted: 09/10/2010] [Indexed: 11/12/2022]
Abstract
In order to investigate the relationship between the primary structure of Orpotrin, a vasoactive peptide previously isolated from the freshwater stingray Potamotrygon gr. orbignyi, and its microcirculatory effects, three Orpotrin analogs were synthesized. The analogs have a truncated N-terminal with a His residue deletion and two substituted amino acid residues, where one Nle is substituted for one internal Lys residue and the third analog has a substitution of a Pro for an Ala (Orp-desH(1) , Orp-Nle and Orp-Pro/Ala, respectively). Only Orp-desH(1) could induce a lower vasoconstriction effect compared with the natural Orpotrin, indicating that besides the N-terminal, the positive charge of Lys and the Pro residues located at the center of the amino acid chain is crucial for this vasoconstriction effect. Importantly, the suggestions made with bioactive peptides were based on the molecular modeling and dynamics of peptides, the presence of key amino acids and shared activity in microcirculation, characterized by intravital microscopy. Moreover, this study has demonstrated that even subtle changes in the primary structure of Orpotrin alter the biological effects of this native peptide significantly, which could be of interest for biotechnological applications.
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Menezes MC, de Oliveira AK, Melo RL, Lopes-Ferreira M, Rioli V, Balan A, Paes Leme AF, Serrano SM. Disintegrin-like/cysteine-rich domains of the reprolysin HF3: Site-directed mutagenesis reveals essential role of specific residues. Biochimie 2011; 93:345-51. [DOI: 10.1016/j.biochi.2010.10.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Accepted: 10/11/2010] [Indexed: 11/17/2022]
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Sosa-Rosales I, Bruni FM, Lopes-Ferreira M, Lima C. PS2-10 Leukocyte transendothelial migration induced by C-type fish lectin TMC4 is mediated by β1, α2, α5, and α1 integrins and independent on VCAM-1 binding. Cytokine 2010. [DOI: 10.1016/j.cyto.2010.07.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Conceição K, Santos JM, Bruni FM, Klitzke CF, Marques EE, Borges MH, Melo RL, Fernandez JH, Lopes-Ferreira M. Characterization of a new bioactive peptide from Potamotrygon gr. orbignyi freshwater stingray venom. Peptides 2009; 30:2191-9. [PMID: 19682520 DOI: 10.1016/j.peptides.2009.08.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 07/30/2009] [Accepted: 08/04/2009] [Indexed: 01/13/2023]
Abstract
Brazilian freshwater stingrays, Potamotrygon gr. orbigyni, are relatively common in the middle-western regions of Brazil, where they are considered an important public health threat. In order to identify some of their naturally occurring toxin peptides available in very low amounts, we combine analytical protocols such as reversed-phase high-performance liquid chromatography (RP-HPLC), followed by a biological microcirculatory screening and mass spectrometry analysis. Using this approach, one bioactive peptide was identified and characterized, and two analogues were synthesized. The natural peptide named Porflan has the primary structure ESIVRPPPVEAKVEETPE (MW 2006.09 Da) and has no similarity with any bioactive peptide or protein found in public data banks. Bioassay protocols characterized peptides as presenting potent activity in a microcirculatory environment. The primary sequences and bioassay results, including interactions with the membrane phospholipids, suggest that these toxins are a new class of fish toxins, directly involved in the inflammatory processes of a stingray sting.
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Kabbara MF, Grund LZ, Komegae EN, Boletini-Santos D, Lopes-Ferreira M, Lima C. The counter-balance of long-term expansion of memory and regulatory cells sustains chronic asthma in a murine model. Cytokine 2009. [DOI: 10.1016/j.cyto.2009.07.453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Boletini-Santos D, Conceição K, Sosa-Rosales I, Lopes-Ferreira M, Lima C. A novel c-type lectin protein from the Thalasshopryne maculosa venomous fish with inflammatory-inducing activity in mice. Cytokine 2009. [DOI: 10.1016/j.cyto.2009.07.481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Saraiva TC, Grund LZ, Komegae EN, Boletini-Santos D, Ramos AD, Conceição K, Orii NM, Lima C, Lopes-Ferreira M. Nattectin a fish C-type lectin licenses macrophages to differentiate into cells exhibiting typical dendritic cells function. Cytokine 2009. [DOI: 10.1016/j.cyto.2009.07.452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Oliveira AK, Paes Leme AF, Assakura MT, Menezes MC, Zelanis A, Tashima AK, Lopes-Ferreira M, Lima C, Camargo AC, Fox JW, Serrano SM. Simplified procedures for the isolation of HF3, bothropasin, disintegrin-like/cysteine-rich protein and a novel P-I metalloproteinase from Bothrops jararaca venom. Toxicon 2009; 53:797-801. [DOI: 10.1016/j.toxicon.2009.02.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Revised: 02/13/2009] [Accepted: 02/17/2009] [Indexed: 11/29/2022]
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Carvalho RR, Pellizzon CH, Justulin L, Felisbino SL, Vilegas W, Bruni F, Lopes-Ferreira M, Hiruma-Lima CA. Effect of mangiferin on the development of periodontal disease: Involvement of lipoxin A4, anti-chemotaxic action in leukocyte rolling. Chem Biol Interact 2009; 179:344-50. [DOI: 10.1016/j.cbi.2008.10.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2008] [Revised: 10/23/2008] [Accepted: 10/24/2008] [Indexed: 12/18/2022]
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Martins AMC, Barbosa PSF, Sousa DF, Alves CD, Menezes DB, Lima C, Lopes-Ferreira M, Fonteles MC, Monteiro HSA. Antivenom action on renal effects induced by Thalassophryne nattereri venom. J Venom Anim Toxins Incl Trop Dis 2009. [DOI: 10.1590/s1678-91992009000100011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Conceição K, Bruni FM, Sciani JM, Konno K, Melo RL, Antoniazzi MM, Jared C, Lopes-Ferreira M, Pimenta DC. Identification of bradykinin: related peptides from Phyllomedusa nordestina skin secretion using electrospray ionization tandem mass spectrometry after a single-step liquid chromatography. J Venom Anim Toxins Incl Trop Dis 2009. [DOI: 10.1590/s1678-91992009000400004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Menezes MC, Paes Leme AF, Melo RL, Silva CA, Della Casa M, Bruni FM, Lima C, Lopes-Ferreira M, Camargo AC, Fox JW, Serrano SM. Activation of leukocyte rolling by the cysteine-rich domain and the hyper-variable region of HF3, a snake venom hemorrhagic metalloproteinase. FEBS Lett 2008; 582:3915-21. [DOI: 10.1016/j.febslet.2008.10.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Revised: 10/08/2008] [Accepted: 10/22/2008] [Indexed: 01/13/2023]
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Pareja-Santos A, Oliveira Souza VM, Bruni FM, Sosa-Rosales JI, Lopes-Ferreira M, Lima C. Delayed polymorphonuclear leukocyte infiltration is an important component of Thalassophryne maculosa venom pathogenesis. Toxicon 2008; 52:106-14. [DOI: 10.1016/j.toxicon.2008.05.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2007] [Revised: 05/13/2008] [Accepted: 05/14/2008] [Indexed: 11/30/2022]
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de Paula Ferreira M, Nishijima CM, Seito LN, Dokkedal AL, Lopes-Ferreira M, Di Stasi LC, Vilegas W, Hiruma-Lima CA. Gastroprotective effect of Cissus sicyoides (Vitaceae): involvement of microcirculation, endogenous sulfhydryls and nitric oxide. JOURNAL OF ETHNOPHARMACOLOGY 2008; 117:170-174. [PMID: 18304768 DOI: 10.1016/j.jep.2008.01.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2007] [Revised: 01/04/2008] [Accepted: 01/12/2008] [Indexed: 05/26/2023]
Abstract
AIM OF THE STUDY Cissus sicyoides L. is a medicinal plant popularly known in Brazil against various diseases and the research interest in this plant is justifiable because of its potential medicinal value in stomachache and gastric ulcer. MATERIALS AND METHODS The methanolic extract obtained from the leaves of Cissus sicyoides (Cc) was evaluated for the ability to protect the gastric mucosa against injuries caused by necrotizing agents (0.3 M HCl/60% EtOH, absolute ethanol, piroxicam and pylorus ligature) in rodents. We also evaluated microcirculation, antioxidant action and participation of NO (nitric oxide) and sulfhydryls (SH) groups in the Cc gastroprotective action. RESULTS Administration of Cc significantly reduced gastric lesions induced by different ulcerogenic agents in rodents. This extract administered by oral route significantly increased gastric volume without exerting antisecretory effect. The Cc effect involved an increase of the defense mechanism of the gastrointestinal mucosa such as NO and SH groups that prevent and attenuate the ulcer process. The Cc also has antioxidant property against oxidative stress but does not modify microcirculation response in gastric mucosa. CONCLUSIONS These results confirmed the traditional use of Cissus sicyoides for the treatment of gastric ulcer.
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Boletini-Santos D, Komegae EN, Figueiredo SG, Haddad V, Lopes-Ferreira M, Lima C. Systemic response induced by Scorpaena plumieri fish venom initiates acute lung injury in mice. Toxicon 2008; 51:585-96. [DOI: 10.1016/j.toxicon.2007.11.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2007] [Revised: 11/13/2007] [Accepted: 11/15/2007] [Indexed: 10/22/2022]
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Baldo C, Tanjoni I, León IR, Batista IFC, Della-Casa MS, Clissa PB, Weinlich R, Lopes-Ferreira M, Lebrun I, Amarante-Mendes GP, Rodrigues VM, Perales J, Valente RH, Moura-da-Silva AM. BnP1, a novel P-I metalloproteinase from Bothrops neuwiedi venom: biological effects benchmarking relatively to jararhagin, a P-III SVMP. Toxicon 2008; 51:54-65. [PMID: 17889921 DOI: 10.1016/j.toxicon.2007.08.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Revised: 08/09/2007] [Accepted: 08/10/2007] [Indexed: 11/28/2022]
Abstract
Snake venom metalloproteinases (SVMPs) have been extensively studied and their effects associated with the local bleeding observed in human accidents by viper snakes. Representatives of P-I and P-III classes of SVMPs similarly hydrolyze extracellular matrix proteins or coagulation factors while only P-III SVMPs induce significant hemorrhage in experimental models. In this work, the effects of P-I and P-III SVMPs on plasma proteins and cultures of muscle and endothelial cells were compared in order to enlighten the mechanisms involved in venom-induced hemorrhage. To reach this comparison, BnP1 was isolated from B. neuwiedi venom and used as a weakly hemorrhagic P-I SVMPs and jararhagin was used as a model of potently hemorrhagic P-III SVMP. BnP1 was isolated by size exclusion and anion-exchange chromatographies, showing apparent molecular mass of approximately 24kDa and sequence similarity with other members of SVMPs, which allowed its classification as a group P-I SVMP. The comparison of local effects induced by SVMPs showed that BnP1 was devoid of significant myotoxic and hemorrhagic activities and jararhagin presented only hemorrhagic activity. BnP1 and jararhagin were able to hydrolyze fibrinogen and fibrin, although the latter displayed higher activity in both systems. Using HUVEC primary cultures, we observed that BnP1 induced cell detachment and a decrease in the number of viable endothelial cells in levels comparable to those observed by treatment with jararhagin. Moreover, both BnP1 and jararhagin induced apoptosis in HUVECs while only a small increase in LDH supernatant levels was observed after treatment with jararhagin, suggesting that the major mechanism involved in endothelial cell death is apoptosis. Jararhagin and BnP1 induced little effects on C2C12 muscle cell cultures, characterized by a partial detachment 24h after treatment and a mild necrotic effect as evidenced by a small increase in the supernatants LDH levels. Taken together, our data show that P-I and P-III SVMPs presented comparable effects except for the hemorrhagic activity, suggesting that hydrolysis of coagulation factors or damage to endothelial cells are not sufficient for induction of local bleeding.
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Lira MS, Furtado MF, Martins LMP, Lopes-Ferreira M, Santoro ML, Barbaro KC. Enzymatic and immunochemical characterization of Bothrops insularis venom and its neutralization by polyspecific Bothrops antivenom. Toxicon 2007; 49:982-94. [PMID: 17382362 DOI: 10.1016/j.toxicon.2007.01.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2006] [Revised: 01/16/2007] [Accepted: 01/17/2007] [Indexed: 11/24/2022]
Abstract
Herein we compared the biological activities of Bothrops insularis and Bothrops jararaca venoms as well as their neutralization by polyspecific Bothrops antivenom (PBA). On account of that, we investigated their antigenic cross-reactivity and the neutralization of lethal, myotoxic and defibrinating activities by polyspecific and species-specific antivenoms. Silver-stained SDS-PAGE gels evidenced many common bands particularly above 47 kDa between B. jararaca and B. insularis venoms. However, some protein bands between 46 and 28 kDa were observed exclusively in B. jararaca venom. Both venoms presented gelatinolytic, caseinolytic, fibrinogenolytic and phospholipase A(2) activities. No hyaluronidase activity was detected in both venoms by zymography. Polyspecific and species-specific antivenoms showed similar titers to B. jararaca and B. insularis venoms by ELISA, and recognized similar components by immunoblotting. The PBA was effective in neutralizing the lethal, myotoxic and defibrinating activities of both venoms as well as to abrogate microcirculatory disturbances induced by B. insularis venom. No statistically significant difference was observed for minimal hemorrhagic doses between both venoms. Antigenic cross-reactivity was evident between both venoms. Since toxic and enzymatic activities were similar, we speculate that B. insularis venoms can induce a local damage in humans comparable to that observed in other Bothrops venoms. Besides, the PBA was effective in neutralizing the toxic activities of B. insularis venom.
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Piran-Soares AA, Komegae EN, Souza VMO, Fonseca LA, Lima C, Lopes-Ferreira M. Neutralizing antibodies obtained in a persistent immune response are effective against deleterious effects induced by the Thalassophryne nattereri fish venom. Toxicon 2007; 49:920-30. [PMID: 17391720 DOI: 10.1016/j.toxicon.2007.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2006] [Revised: 12/28/2006] [Accepted: 01/11/2007] [Indexed: 12/26/2022]
Abstract
Thalassophryne nattereri envenoming represents a great cost to North and Northeast Brazilian communities in terms of public healths, leisure and tourism. Victims rapidally develop symptoms as pain, local swelling, erythema followed by intense necrosis that persist for long days. The aim of this work was tested the immune competence of neutralizing antibodies in pre-immunized mice against principal toxic activities induced by venom. During the primary antibody response in mice, an elevation of IgG antibody levels was only observed on day 28. After boosting, high antibody levels were detected between days 49 and 70, with a 12-fold increase in IgG level over control values at day 49. We confirmed the in vitro neutralizing capacity of T. nattereri anti-venom against toxic effects and thereafter we show that neutralizing antibodies obtained in a persistent immune response are more effective, inclusive against edematous reaction. After boosting during the secondary response mice with high antibody levels do not present any alterations in venule or arteriole after topical application of venom on cremaster muscle. In addition, CK activity diminished in these mice with high neutralizing antibody levels corroborating the attenuation of the myonecrotic effect by venom. In addition, we determined the presence of high IgG antibodies levels in patients 6 months after injury by T. nattereri. In conclusion, the presence of neutralizing antibodies against to T. nattereri venom in the serum of pre-immunized mice could change the outcome of lesion at site of posterior envenoming. Antigen-specific antibodies of high affinity in consequence to specific immune response, dependent of T lymphocyte activation, could minimize the symptoms of intense and immediate inflammatory reaction caused by T. nattereri venom. These finding prompt us to the possibility of development of immune therapeutic strategies using specific anti-venom as an efficient intervention for protecting human victims.
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Junqueira MEP, Grund LZ, Orii NM, Saraiva TC, de Magalhães Lopes CA, Lima C, Lopes-Ferreira M. Analysis of the inflammatory reaction induced by the catfish (Cathorops spixii) venoms. Toxicon 2007; 49:909-19. [PMID: 17321559 DOI: 10.1016/j.toxicon.2007.01.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2006] [Revised: 01/03/2007] [Accepted: 01/11/2007] [Indexed: 01/12/2023]
Abstract
Cathorops spixii is one of the most abundant venomous fish of the southeastern coast of the State of São Paulo, and consequently causes a great part of the accidents seen there. The accidents affect mainly fishermen, swimmers and tourists and are characterized by punctiform or wide wounds, erythema, edema, pain, sudoresis, indisposition, fever, nausea, vomiting and secondary infection. The objective of this work was to characterize the inflammatory response induced in mice by both venoms (mucus and sting) of the catfish C. spixii. Our results demonstrated that both venoms induced a great number of rolling and adherent leukocytes in the post-capillary venules of cremaster muscle of mice, and an increase in the vascular permeability in peritoneal cavity. Mucus induced the recruitment of neutrophils immediately after injection followed later by macrophage infiltration. In contrast, the cellular infiltration elicited by sting venom was rapidly resolved. The peritonitis reaction provoked by venoms was characterized by cytokine (IL-6), chemokines (MCP-1 and KC) or lipid mediator (LTB4) production in the peritoneal cavity. The macrophages from 7-day mucus venom-induced exudates upon in vitro mucus venom stimulation, expressed CD11c x MHC class II and release bioactive IL-12p70. On the other hand, sting venom-elicited peritoneal macrophages lost the ability to differentiate into dendritic cells, following re-stimulation in vitro with sting venom, they do not express CD11c, nor do they exhibit sufficient levels of MHC class II. In conclusion, both types of venoms (mucus or sting) promote inflammatory reaction with different profiles, and the inflammatory reaction induced by the first was characterized by antigen persistence in peritoneal cavity that allowed the activation of phagocytic cells with capacity of antigenic presentation.
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Conceição K, Miriane Bruni F, Antoniazzi MM, Jared C, Camargo ACM, Lopes-Ferreira M, Pimenta DC. Major biological effects induced by the skin secretion of the tree frog Phyllomedusa hypochondrialis. Toxicon 2007; 49:1054-62. [PMID: 17306319 DOI: 10.1016/j.toxicon.2006.12.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 12/06/2006] [Accepted: 12/11/2006] [Indexed: 10/23/2022]
Abstract
Amphibian skin secretions contain several bioactive compounds such as biogenic amines, alkaloids, steroids, proteins and peptides; being peptides a continuously growing field of interest. This work aims to describe the main physiopathological properties of the tree frog Phyllomedusa hypochondrialis skin secretion, obtained by manual stimulation of the dorsal skin surface. Intravenous skin secretion administration provoked lethal effect in mice after 5min. Low doses induced significant systemic and local effects like edema and nociception in mice and topic administration induced myonecrosis in the endothelium of cremaster mice. The presence of phospholipase A(2) activity, proteolytic activity and creatine kinase activity (in the plasma of treated mice) are reported and are very likely to be related to the physiopathological (edematic and myotoxic) activities observed. These data provide in vivo evidence of the complex toxic effects of the P. hypochondrialis skin secretion as well as possible mechanisms of action for these effects.
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Elífio-Esposito SL, Hess PL, Moreno AN, Lopes-Ferreira M, Ricart CAO, Souza MV, Hasselman-Zielinski F, Becker JA, Pereira LF. A C-type lectin from Bothrops jararacussu venom can adhere to extracellular matrix proteins and induce the rolling of leukocytes. J Venom Anim Toxins Incl Trop Dis 2007. [DOI: 10.1590/s1678-91992007000400009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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49
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Conceição K, Konno K, Melo RL, Marques EE, Hiruma-Lima CA, Lima C, Richardson M, Pimenta DC, Lopes-Ferreira M. Orpotrin: a novel vasoconstrictor peptide from the venom of the Brazilian stingray Potamotrygon gr. orbignyi. Peptides 2006; 27:3039-46. [PMID: 17056153 DOI: 10.1016/j.peptides.2006.09.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2006] [Revised: 09/06/2006] [Accepted: 09/07/2006] [Indexed: 10/24/2022]
Abstract
Characterization of the peptide content of venoms has a number of potential benefits for basic research, clinical diagnosis, development of new therapeutic agents, and production of antiserum. In order to analyze in detail the peptides and small proteins of crude samples, techniques such as chromatography and mass spectrometry have been employed. The present study describes the isolation, biochemical characterization, and sequence determination of a novel peptide, named Orpotrin from the venom of Potamotrygon gr. orbignyi. The natural peptide was shown to be effective in microcirculatory environment causing a strong vasoconstriction. The peptide was fully sequenced by de novo amino acid sequencing with mass spectrometry and identified as the novel peptide. Its amino acid sequence, HGGYKPTDK, aligns only with creatine kinase residues 97-105, but has no similarity to any bioactive peptide. Therefore, possible production of this peptide from creatine kinase by limited proteolysis is discussed. Taken together, the results indicate the usefulness of this single-step approach for low molecular mass compounds in complex samples such as venoms.
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Conceição K, Bruni FM, Pareja-Santos A, Antoniazzi MM, Jared C, Lopes-Ferreira M, Lima C, Pimenta DC. Unusual profile of leukocyte recruitment in mice induced by a skin secretion of the tree frog Phyllomedusa hypochondrialis. Toxicon 2006; 49:625-33. [PMID: 17157344 DOI: 10.1016/j.toxicon.2006.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2006] [Revised: 10/24/2006] [Accepted: 10/25/2006] [Indexed: 10/23/2022]
Abstract
Phyllomedusa hypochondrialis skin secretion can cause both systemic and local effects. In this study, we describe the pattern of local acute inflammatory response after P. hypochondrialis skin secretion injection. The inflammatory reaction in the mice footpad was analysed, including the leukocyte recruitment into local tissue from the peripheral blood, in a mouse model of tissue injury. We also investigated the release of the cytokines IL-1, IL-6 and TNF-alpha, chemokines KC and MCP-1 and the eicosanoids LTB 4 and PGE(2) in mice. The present findings support the ability of P. hypochondrialis skin secretion to induce local inflammation. In addition, these skin secretion components play a role in the initial rolling and slowing of recruited leukocytes and the transition from rolling to adhesion. Levels of the proinflammatory cytokine IL-6, chemokines KC and MCP-1 as well as the eicosanoid PGE(2) were significantly increased after injection of a skin secretion of P. hypochondrialis (0.6 microg/30 microl intraplantar), whereas no changes in other parameters were observed. Finally, the mechanisms involved in the local inflammatory process induced by P. hypochondrialis skin secretion is one of the questions of relevance related to the complex pathophysiology induced by this particular secretion and other toxins.
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