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Barboza M, Kulane A, Burström B, Lindberg L, Burström K, Marttila A. Building trust through a postnatal extended home visiting programme in Sweden: parents' perceptions. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky214.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M Barboza
- Equity and Health Policy Research Group, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
| | - A Kulane
- Equity and Health Policy Research Group, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
| | - B Burström
- Equity and Health Policy Research Group, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - L Lindberg
- Prevention, Intervention and Mechanisms in Public Health Research Group, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
- Centre for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - K Burström
- Health Outcomes and Economic Evaluation Research Group, Stockholm Centre for Healthcare Ethics, Department of Learning, Informatics, Management and Ethics, Karolinska Institute, Stockholm, Sweden
- Equity and Health Policy Research Group, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
| | - A Marttila
- Equity and Health Policy Research Group, Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
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Goel N, Eisenberg F, Barboza M, Campion D, Bibeau K. AB1035 Rheumatoid Arthritis and Juvenile Idiopathic Arthritis Registries: A Qualitative Analysis of Data in clinicaltrials.gov. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Spina G, Arantes R, Barbosa A, Barboza M, Matheus A, Sperandio E, Lauria V, Almeida F, Almeida V, Silva R, Oliveira A, Nascimento M, Bianchim M, Romiti M, Gagliardi A, Dourado V. Age- and sex-related differences in heart rate variability are present despite the suitable level of accelerometer-based physical activity. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Matheus A, Gagliardi A, Sperandio E, Almeida F, Almeida V, Barbosa A, Barboza M, Bianchim M, Lauria V, Nascimento M, Oliveira A, Silva R, Spina G, Romiti M, Arantes R, Dourado V. Prevalence of exercise intolerance and associated factors in asymptomatic adults underwent cardiopulmonary exercise testing: the role of body mass index. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Hirata DB, Oliveira JHHL, Leão KV, Rodrigues MI, Ferreira AG, Giulietti M, Barboza M, Hokka CO. Optimization of the precipitation of clavulanic acid from fermented broth using t-octylamine as intermediate. Braz J Chem Eng 2013. [DOI: 10.1590/s0104-66322013000200002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | - K. V. Leão
- Universidade Federal de São Carlos, Brasil
| | | | | | | | - M. Barboza
- Universidade Federal de São Carlos, Brasil
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Granato AC, Barboza M, Romano LH, Hernandez ILC, Hokka CO, Oliveira JHHL, Montenegro RC, Sousa CPD. Comparison of growth methods and biological activities of brazilian marine Streptomyces. Braz J Chem Eng 2013. [DOI: 10.1590/s0104-66322013000100014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - M. Barboza
- Universidade Federal do Triângulo Mineiro, Brazil
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da Silva CS, Cuel MF, Barreto VO, Kwong WH, Hokka CO, Barboza M. Separation of clavulanic acid from fermented broth of amino acids by an aqueous two-phase system and ion-exchange adsorption. N Biotechnol 2011; 29:428-31. [PMID: 21683811 DOI: 10.1016/j.nbt.2011.05.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Revised: 04/11/2011] [Accepted: 05/24/2011] [Indexed: 11/18/2022]
Abstract
The clavulanic acid is a substance which inhibits the β-lactamases used with penicillins for therapeutic treatment. After the fermentation, by-products of low molecular weight such as amino acids lysine, histidine, proline and tyrosine are present in the fermented broth. To remove these impurities the techniques of extraction by an aqueous two-phase system of 17% polyethylene glycol molecular weight 600 and 15% potassium phosphate were used for a partial purification. A subsequent ion-exchange adsorption was used for the recuperation of the clavulanic acid of the top phase and purification getting a concentration factor of 2 and purification of 100% in relation to the amino acids lysine, histidine, proline and tyrosine.
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Affiliation(s)
- Clovis Sacardo da Silva
- Department of Chemical Engineering, Universidade Federal de São Carlos, Cx. Postal 676, CEP 13565-905, São Carlos, SP, Brazil
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Barboza M, Silva C, Cuel M, Barreto V, Hokka C. Separation of clavulanic acid from fermented broth of amino acids by an aqueous two-phase system and ion exchange adsorption. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Hirata D, Oliveira J, Leão K, Ferreirra A, Giulietti M, Rodrigues M, Barboza M, Hokka C. Optimization of clavulanic acid precipitation reactions. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hirata D, Oliveira J, Leão K, Rodrigues M, Ferreira A, Giulietti M, Barboza M, Hokka C. Precipitation of clavulanic acid from fermentation broth with potassium 2-ethyl hexanoate salt. Sep Purif Technol 2009. [DOI: 10.1016/j.seppur.2009.01.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Picarelli D, Kreutzer CH, Barboza M, Antunez S, Pose G, Touyá G, Liguera L, Abdala D, Echegaray G. Post-cardiotomy circulatory support with the Terumo Baby-Rx oxygenator in a newborn. Perfusion 2008; 22:377-9. [PMID: 18666738 DOI: 10.1177/0267659108091560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Some patients with severe post-cardiotomy ventricular dysfunction are unable to be separated from cardiopulmonary bypass (CPB). In this setting, extracorporeal circulatory support (ECS) should be instituted to obtain eventual myocardial recovery. We present a newborn in whom an ECS was established with the oxygenator used for the surgical correction.
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Affiliation(s)
- D Picarelli
- Congenital Cardiac Surgery, Sanatorio Americano, Montevideo, Uruguay.
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Acosta DM, Arnaiz MR, Esteva MI, Barboza M, Stivale D, Orlando UD, Torres S, Laucella SA, Couto AS, Duschak VG. Sulfates are main targets of immune responses to cruzipain and are involved in heart damage in BALB/c immunized mice. Int Immunol 2008; 20:461-70. [DOI: 10.1093/intimm/dxm149] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Duschak VG, Barboza M, García GA, Lammel EM, Couto AS, Isola ELD. Novel cysteine proteinase inTrypanosoma cruzimetacyclogenesis. Parasitology 2005; 132:345-55. [PMID: 16238824 DOI: 10.1017/s0031182005009030] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2005] [Revised: 04/04/2005] [Accepted: 08/18/2005] [Indexed: 11/06/2022]
Abstract
With the aim to study proteinases released to the culture medium duringTrypanosoma cruzimetacyclogenesis, the presence of cysteine proteinases (CPs) was analysed in culture supernatants obtained throughout the differentiation induced by stimulation of epimastigotes withTriatoma infestanshindgut homogenate. In SDS-gelatin containing gels, an important endopeptidase activity with apparent molecular weight range between 97 and 116 kDa was encountered at pH 6, which was abolished by the specific cysteine proteinase inhibitor E-64 and TLCK, but not by pepstatin, 1,10 phenantroline or PMSF. This novel CP, namedTcCPmet, showed affinity to cystatin-Sepharose, denoting its thiol-proteinase character as well as to ConA-Sepharose, indicating it contains N-linked oligosaccharides. However, it presented a different elution pattern on ConA-Sepharose than cruzipain and, in addition, it was not recognized by anti-cruzipain serum, facts that strongly suggest the different nature of both CPs. Moroever, evidence is presented indicating thatTcCPmet was able to hydrolyse the same chromogenic peptides as cruzipain at optimal alkaline pH values, although with a different order of effectiveness. Our results indicate the presence of a novel CP secreted by metacyclic trypomastigotes and reinforces the important role of these enzymes in metacyclogenesis.
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Affiliation(s)
- V G Duschak
- Instituto Nacional de Parasitología Dr Mario Fatala Chabén, ANLIS-Malbrán, Ministerio de Salud y Ambiente, Av. Paseo Colon 568, 1063 Buenos Aires, Argentina.
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Abstract
Clavulanic acid (CA) is a beta-lactamase inhibitor produced by strains of Streptomyces clavuligerus. Nowadays, the combination of CA with amoxycillin is the most successful example of the use of a beta-lactam antibiotic sensitive to beta-lactamases together with an inhibitor of these enzymes. Clavulanic acid is purified from fermentation broth by a series of steps consisting mainly of two-phase separation processes such as liquid-liquid extraction, adsorption or ion-exchange chromatography, among others. Amberlite IRA 400, a strong anion-exchange resin, has a very high adsorption capacity for CA (Mayer et al. 1997). This resin can be pre-treated with NaCl (chloride cycle), to remove selectively only those anions, which are able to displace chloride from the resin or with NaOH (hydroxyl cycle), to remove all species of anions. In order to decide the best operating conditions for CA recovery by ion-exchange resins and then to construct a model of this separation process, batch experiments were conducted using Amberlite IRA 400 in the chloride cycle. These runs were carried out in a 200 ml stirred tank, at two different initial solution pH, 6.2 and 4.0; the temperature was maintained at 10 degrees C and 20 degrees C during adsorption and 30 degrees C during the desorption step. It was possible, on the basis of these batch results, to model the separation process, including the adsorption kinetics, equilibrium data and mass transfer limitations.
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Affiliation(s)
- M Barboza
- Department of Chemical Engineering, Federal University of São Carlos, SP, Brazil
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Barboza M, Hokka CO, Maugeri F. Continuous cephalosporin C purification: dynamic modelling and parameter validation. Bioprocess Biosyst Eng 2002; 25:193-203. [PMID: 14508678 DOI: 10.1007/s00449-002-0294-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2001] [Accepted: 06/20/2002] [Indexed: 11/26/2022]
Abstract
A mathematical kinetic model for the adsorption and desorption of cephalosporin C on Amberlite XAD-2 resin is proposed. The model can represent Langmuir, Freundlich or linear isotherms at equilibrium. The intrinsic kinetic parameters and adsorption isotherms as well as physical parameters such as the effective diffusivity and the external mass transfer coefficient were obtained at different temperatures and ethanol concentrations. An unfavourable cephalosporin C adsorption occurred when ethanol was present in the solution. It has been shown that at 25 degrees C the ethanol, at concentrations from 1.5% to 2.5%, decreases the cephalosporin C adsorption. However, this behaviour was not observed at 10 degrees C. The kinetic model fitted the experimental data well under different conditions. The model was validated in a continuous process of cephalosporin C purification using the same resin. The model with the validated parameters is able to predict the behaviour of the reactor system. The continuous process is composed of two stirred tank reactors with adsorber recycle. The adsorption occurs in the first stage, and elution of the product takes place in the second stage with ethanol as eluent. The dynamic behaviour of the process was described using the following parameters: hydraulic residence time for the first (theta(h1)) and second stage (theta(h2)), solid residence time (theta(s)), initial concentration of CPC (C(0)), inlet ethanol concentration (C(ET0)) and kinetics parameters.
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Affiliation(s)
- M Barboza
- Departamento de Engenharia Química, Universidade Federal de São Carlos, Via Washington Luiz, Km 235, CEP: 13560-700, São Carlos, SP, Brazil
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Salamone MC, Rosselot C, Salamone GV, Barboza M, Kado M, Fainboim L. Antibodies recognizing CD24 LAP epitope on human T cells enhance CD28 and IL-2 T cell proliferation. J Leukoc Biol 2001; 69:215-23. [PMID: 11272271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
Membrane expression of the CD24 molecule on activated T lymphocytes is not elucidated fully. We previously described the intracellular and cell-surface expression of the CD24 sialic acid-dependent epitope(s) on phytohemagglutinin-activated peripheral blood mononuclear cells. However, the CD24 core protein was not detected previously on human T cells. This study reinvestigated the expression and role of CD24 in T cell subsets. We analyzed binding of anti-CD24 monoclonal antibodies (mAbs) to sialic and leucine-alanine-proline (LAP) epitopes in resting and activated, normal T lymphocytes. CD24 LAP and CD24 sialic epitopes were detected on activated CD4- and CD8-positive cells. Although expression of CD24 sialic epitopes remained stably expressed in interleukin (IL)-2-dependent cultures, T cell expression of the LAP epitope was transient. Anti-LAP antibodies strongly enhanced the response of T cells to a combination of anti-CD3/CD28 mAbs and enhanced proliferative response induced by recombinant IL-2. We found similarities in the tissue distribution and function of the human CD24 LAP molecule and the murine, heat-stable antigen, which suggests that CD24 might function as a signaling molecule on human T cells.
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Affiliation(s)
- M C Salamone
- Immunogenetic Division, University Hospital, School of Medicine, University of Buenos Aires, Argentina.
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Abstract
The increased recognition of both old and new enteric pathogens and their potential impact requires an improved understanding of pathogenesis and effective interventions. While the overwhelming mortality (> 3 million children per year) due to diarrheal diseases is well-recognized, the potential long-term impacts of enteric infections and early childhood diarrhea morbidity are just beginning to be appreciated. Furthermore, several enteric infections are now being recognized as causes of growth shortfalls with or without diarrhea; i.e., malnutrition may be one of the greatest yet of the "emerging infectious diseases." The increased appreciation of this extended impact calls for further quantification and improved understanding of the deranged physiology. In particular, persistent diarrheal illnesses exhibit common themes of blunted villi, disruption of intestinal barrier function and varying degrees of sub-mucosal inflammation for which lactulose/mannitol permeability and fecal lactoferrin provide respective quantification. Finally, such improved understanding will allow targeted interventions among those most vulnerable, which will enable further documentation of cost effectiveness and the potential for improved human development which is critical to reducing the widening disparity and population overgrowth which increasingly threaten our global security.
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Affiliation(s)
- R L Guerrant
- Division of Geographic and International Medicine, University of Virginia, Charlottesville, USA
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Barboza M, Zaiat M, Hokka CO. General relationship for volumetric oxygen transfer coefficient ( kLa) prediction in tower bioreactors utilizing immobilized cells. Bioprocess Biosyst Eng 2000. [DOI: 10.1007/s004490050029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jancic C, Chuluyan HE, Morelli A, Larregina A, Kolkowski E, Saracco M, Barboza M, Leiva WS, Fainboim L. Interactions of dendritic cells with fibronectin and endothelial cells. Immunology 1998; 95:283-90. [PMID: 9824488 PMCID: PMC1364317 DOI: 10.1046/j.1365-2567.1998.00586.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We studied the phenotypic characteristics of spontaneously migrated skin dendritic cells (sDC) and monocyte-derived dendritic cells (moDC), generated under different culture conditions, and their interactions with fibronectin (FN) and endothelial cells. Monocyte-derived dendritic cells were obtained after culturing monocytes with granulocyte-macrophage colony-stimulating factor (GM-CSF) (800 U/ml) and interleukin-4 (IL-4) (500 U/ml) with either 10% fetal bovine serum (FBS) or 10% allogeneic human serum (HS). Regardless of the type of serum used, the majority of moDC expressed human leucocyte antigen-DR (HLA-DR) and CD86. On day 5 of incubation, 20-67% of moDC cultured in the presence of HS (HS-moDC) expressed CD1a, b and c versus 94-97% when cultured in the presence of FBS (FBS-moDC). DC showed a differential gradient of adhesion to FN: FBS-moDC>HS-moDC>sDC approximately monocytes. Both FBS-moDC and HS-moDC were strongly positive for CD49e (alpha5-integrin) and CD29 (beta1-integrin) but negative for CD49d (alpha4-integrin). A monoclonal antibody (mAb) against CD49e blocked the adhesion of both types of moDC to FN. Although both FBS-moDC and HS-moDC attached to endothelium (a 76% and 63% increase, respectively), only HS-moDC were able to migrate through non-activated endothelium. Overall, these results suggest that spontaneously migrated sDC are less adherent to FN than moDC, that HS and FBS induce differences in CD1 expression, that HS-moDC are less adhesive to FN and endothelial cells but more motile than FBS-moDC, and that alpha5beta1-integrin is the molecule involved in moDC adhesion to FN.
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Affiliation(s)
- C Jancic
- Laboratory of Immunogenetics, Hospital de Clínicas, School of Medicine, University of Buenos Aires, Argentina
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del C. Salamone M, Reyes G, Salamone G, Kado M, Barboza M, Fainboim L. Anti-CD85 antibodies modulate the proliferative response of T cells to PHA. Immunol Lett 1997. [DOI: 10.1016/s0165-2478(97)86083-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
The effect of several drugs on the edema-forming activity of Bothrops asper venom was studied plethysmographically using the mouse foot pad assay. Bothrops asper venom induced a dose-dependent edema which developed rapidly and peaked 1 hr after envenomation. Incubation of venom with EDTA before injection resulted in a significant reduction of edema. In addition, pretreatment with prazosin, indomethacin, dexamethasone, yohimbine and mepacrine resulted in a significant reduction in edema-forming activity. However, no inhibitory effect was observed when mice were pretreated with verapamil, nordihydroguaiaretic acid, pyrilamine, cimetidine and propranolol. When drugs were administered after venom injection, only prazosin and indomethacin were effective in reducing edema. These results suggest that B. asper venom-induced edema in the mouse foot pad model is mediated, at least partially, by metalloproteinases, phospholipase A2, eicosanoid products and activation of alpha 1 and alpha 2 adrenergic receptors.
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Affiliation(s)
- F Chaves
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José
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