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1.
Artigo em Inglês | LILACS-Express | LILACS, VETINDEX | ID: biblio-1484696

RESUMO

Abstract In this paper we discuss recent significant developments in the field of venom research, specifically the emergence of top-down proteomic applications that allow achieving compositional resolution at the level of the protein species present in the venom, and the absolute quantification of the venom proteins (the term protein species is used here to refer to all the different molecular forms in which a protein can be found. Please consult the special issue of Jornal of Proteomics Towards deciphering proteomes via the proteoform, protein speciation, moonlighting and protein code concepts published in 2016, vol. 134, pages 1-202). Challenges remain to be solved in order to achieve a compact and automated platform with which to routinely carry out comprehensive quantitative analysis of all toxins present in a venom. This short essay reflects the authors view of the immediate future in this direction for the proteomic analysis of venoms, particularly of snakes.

2.
Artigo em Inglês | LILACS-Express | LILACS, VETINDEX | ID: biblio-1484697

RESUMO

Abstract This work offers a general overview on the evolving strategies for the proteomic analysis of snake venoms, and discusses how these may be combined through diverse experimental approaches with the goal of achieving a more comprehensive knowledge on the compositional, toxic, and immunological characteristics of venoms. Some recent developments in this field are summarized, highlighting how strategies have evolved from the mere cataloguing of venom components (proteomics/venomics), to a broader exploration of their immunological (antivenomics) and functional (toxicovenomics) characteristics. Altogether, the combination of these complementary strategies is helping to build a wider, more integrative view of the life-threatening protein cocktails produced by venomous snakes, responsible for thousands of deaths every year.

3.
Artigo em Inglês | LILACS-Express | LILACS, VETINDEX | ID: biblio-1484709

RESUMO

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 patients 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 g/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 g/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 TNF, IL-1, 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.

4.
J. venom. anim. toxins incl. trop. dis ; 23: 27, 2017. graf, ilus
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-954847

RESUMO

In this paper we discuss recent significant developments in the field of venom research, specifically the emergence of top-down proteomic applications that allow achieving compositional resolution at the level of the protein species present in the venom, and the absolute quantification of the venom proteins (the term "protein species" is used here to refer to all the different molecular forms in which a protein can be found. Please consult the special issue of Jornal of Proteomics "Towards deciphering proteomes via the proteoform, protein speciation, moonlighting and protein code concepts" published in 2016, vol. 134, pages 1-202). Challenges remain to be solved in order to achieve a compact and automated platform with which to routinely carry out comprehensive quantitative analysis of all toxins present in a venom. This short essay reflects the authors' view of the immediate future in this direction for the proteomic analysis of venoms, particularly of snakes.(AU)


Assuntos
Animais , Venenos/análise , Proteoma , Proteômica , Serpentes , Espectrometria de Massas
5.
J. venom. anim. toxins incl. trop. dis ; 23: 26, 2017. graf, ilus
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-954812

RESUMO

This work offers a general overview on the evolving strategies for the proteomic analysis of snake venoms, and discusses how these may be combined through diverse experimental approaches with the goal of achieving a more comprehensive knowledge on the compositional, toxic, and immunological characteristics of venoms. Some recent developments in this field are summarized, highlighting how strategies have evolved from the mere cataloguing of venom components (proteomics/venomics), to a broader exploration of their immunological (antivenomics) and functional (toxicovenomics) characteristics. Altogether, the combination of these complementary strategies is helping to build a wider, more integrative view of the life-threatening protein cocktails produced by venomous snakes, responsible for thousands of deaths every year.(AU)


Assuntos
Animais , Venenos de Serpentes/imunologia , Proteômica , Antivenenos
6.
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-954824

RESUMO

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.(AU)


Assuntos
Artrite , Bothrops , Fosfolipases A2 , Óxido Nítrico , Inflamação
7.
Acta méd. costarric ; 54(2): 86-96, abr.-jun. 2012. ilus
Artigo em Espanhol | LILACS | ID: lil-648691

RESUMO

El presente trabajo ofrece una breve visión de cómo se ha enfrentado el problema del ofidismo en Costa Rica, y en especial, de cómo la investigación científica y tecnológica ha contribuido a tal fin. Se resumen los orígenes de la lucha antiofídica en el país y de la creación del Instituto Clodomiro Picado en la Universidad de Costa Rica, en 1970. Se describen las primeras etapas de su labor y la evolución de distintas líneas de investigación sobre serpientes, venenos y antivenenos, que por espacio de cuatro décadas han contribuido a que en el país y en la región centroamericana, existan recursos terapéuticos adecuados y suficientes para enfrentar el ofidismo.


Assuntos
Animais , Antivenenos , Elapidae , Mordeduras de Serpentes/tratamento farmacológico , Mordeduras de Serpentes/terapia , Venenos de Serpentes , Serpentes , América Central , Costa Rica
8.
Rev. panam. salud pública ; 25(5): 389-393, mayo 2009. graf, mapas, tab
Artigo em Inglês | LILACS | ID: lil-519397

RESUMO

OBJECTIVE: To analyze mortality due to Hymenoptera stings in Costa Rica during 1985-2006. METHODS: Records of deaths due to Hymenoptera stings in 1985-2006 were retrieved from Instituto Nacional de Estadística y Censos (National Statistics and Census Institute). Mortality rates were calculated on the basis of national population reports, as of 1 July of each year. Information for each case included age, gender, and the province in which the death occurred. In addition, reports of Hymenoptera sting accidents received by the Centro Nacional de Intoxicaciones (National Poison Center, CNI) in 1995-2006 were obtained to assess exposure to these insects. RESULTS: Over the 22-year period analyzed, 52 fatalities due to Hymenoptera stings were recorded. Annual mortality rates varied from 0-1.73 per 1 million inhabitants, with a mean of 0.74 (95 percent confidence interval: 0.46-0.93). The majority of deaths occurred in males (88.5 percent), representing a male to female ratio of 7.7:1. A predominance of fatalities was observed in the elderly (50 years of age and older), as well as in children less than 10 years of age. The province with the highest mortality rate was Guanacaste. The CNI documented 1 591 reports of Hymenoptera stings (mostly by bees) in 1995-2006, resulting in an annual average of 133 cases, with only a slight predominance of males over females (1.4:1). CONCLUSIONS: Stings by Hymenoptera, mostly by bees, constitute a frequent occurrence in Costa Rica that can be life-threatening in a small proportion of cases, most often in males and the elderly. The annual number of fatalities fluctuated from 0-6, averaging 2.4 deaths per year. Awareness should be raised not only among the general population, but also among health care personnel that should consider this risk in the clinical management of patients stung by Hymenoptera.


OBJETIVO: Analizar la mortalidad por picaduras de himenópteros en Costa Rica en el período de 1985 a 2006. MÉTODOS: Se obtuvieron los registros de picaduras de himenópteros entre 1985 y 2006 del Instituto Nacional de Estadísticas y Censos. Las tasas de mortalidad se calcularon a partir de los datos de la población nacional para el 1 de julio de cada año. La información de cada caso abarcaba la edad, el sexo y la provincia en la que ocurrió la muerte. Además, para evaluar la exposición a estos insectos se contó con las notificaciones de accidentes por picaduras de himenópteros del Centro Nacional de Intoxicaciones (CNI) de 1995 a 2006. RESULTADOS: En el período de 22 años analizado se registraron 52 muertes por picaduras de himenópteros. La tasa anual de mortalidad varió entre 0 y 1,73 por millón de habitantes, con una media de 0,74 (intervalo de confianza de 95 por ciento: 0,46 a 0,93). La mayoría de las muertes correspondieron a hombres (88,5 por ciento), con una razón hombre:mujer de 7,7:1. Predominaron los casos letales en adultos mayores (50 años o más) y niños menores de 10 años. La provincia con la mayor mortalidad fue Guanacaste. El CNI documentó 1 591 casos de picaduras de himenópteros (principalmente abejas) entre 1995 y 2006, para un promedio anual de 133 casos, con un ligero predominio de hombres sobre mujeres (1,4:1). CONCLUSIONES: Las picaduras de himenópteros, principalmente de abejas, son sucesos frecuentes en Costa Rica que pueden amenazar la vida en una reducida proporción de casos, principalmente hombres y adultos mayores. El número anual de muertes varió entre 0 y 6, con un promedio de 2,4 muertes anuales. Se debe fomentar la conciencia no solo en la población general sino también en el personal especializado de salud, quienes deben tomar en cuenta este riesgo al atender a los pacientes con picaduras de himenópteros.


Assuntos
Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Animais , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Himenópteros , Mordeduras e Picadas de Insetos/mortalidade , Costa Rica/epidemiologia , Fatores de Tempo , Adulto Jovem
9.
Bol. malariol. salud ambient ; 48(2): 135-144, dic. 2008. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-630387

RESUMO

Se evaluaron los efectos tóxicos de los venenos de cinco serpientes costarricenses en cuanto a su capacidad tripanocida contra dos cepas de trypanosoma cruzi y sus efectos en cuanto a los mecanismos de muerte celular. Los venenos de bothrops asper, bothriechis schlegelii, crotalus durissus durissus, atropoides nummifer y A. picadoi, mostraron actividad tripanocida contra las formas de epimastigoto, amastigoto y tripomastigoto. Los venenos de b. asper y de A. nummifer presentaron la más alta citotoxicidad para las células Vero. Los de b. asper y b. schlegelii presentaron la más alta actividad en los epimastigotos de la cepa CL, mientras que los venenos de b. asper y el de A. nummifer fueron más eficientes contra los epimastigotos de la cepa Jennifer. El veneno de b. schlegelii produce un efecto proliferativo en las células Vero; mientras que el de C. d. durissus produce el mismo efecto en los epimastigotos de la cepa CL, ambos a la concentración de 2,5 Ig/mL. Los valores de CI50 mostraron que se requieren menores cantidades contra los amastigotos en relación con los epimastigotos. Los venenos de b. asper y B. schlegelii presentan la más alta actividad contra los amastigotos de ambas cepas. Con los tripomastigotos sanguíneos de la cepa GA, los cinco venenos ocasionaron una disminución de la motilidad en los diferentes tiempos de exposición, pero el veneno de A. nummifer, en las concentraciones más bajas, mostró una actividad más marcada en comparación con los otros veneno. En cuanto a los efectos de los venenos, mediados por los grados de apoptosis, necrosis o proliferación celular, se observó que estos fenémenos se presentan y tienen relación con el tipo de veneno, su concentración y el tiempo de exposición.


The trypanocide effect of venoms from five Costa Rican species of snakes was evaluated against two strains of trypanosoma cruzi and their cellular toxic effects were likewise observed. The venoms of Bothrops asper, bothriechis schlegelii, crotalus durissus durissus, atropoide nummifer and A. picadoi showed evident trypanocide action against epimastigotes, amastigotes and trypomastigotes. The venoms of b. asper and b. schlegelii were shown to be the most active against the epimastigotes of the CL strain, whereas those of b. asper and A. nummifer were more effective against the epimastigotes of the Jennifer strain. The venoms of b. schlegelii and C.d. durissus, at the lowest concentrations of 2.5 Ig/mL, were able to trigger a proliferative effect on Vero cells and epimastigotes of the CL strain, respectively. The IC50 values showed that lower amounts of venoms are necessary in order to inhibit amastigotes as compared to epimastigotes. The venoms of b. asper and b. schlegelii exhibited the highest activity against amastigotes of both T. cruzi strains. All venoms were able to arrest motility of blood trypomastigotes of the GA strain at different times and the most active in this case was A. nummifer venom. The toxic effects of the venoms measured by the degree of apoptosis, necrosis and cell proliferation that they produced showed that all these events occur and are related to the type of venom, its concentration and exposure time.


Assuntos
Adulto , Animais , Trypanosoma cruzi , Trypanosoma cruzi/imunologia , Trypanosoma cruzi/microbiologia , Trypanosoma cruzi/patogenicidade
10.
Rev. biol. trop ; 51(1): 253-259, mar. 2003. ilus, tab, graf
Artigo em Inglês | LILACS | ID: lil-365959

RESUMO

The venom of Bothrops asper induces severe coagulation disturbances in accidentally envenomed humans. However, only few studies have been conducted to identify components that interact with the hemostatic system in this venom. In the present work, we fractionated B. asper venom in order to investigate the possible presence of inhibitors of platelet aggregation. Using a combination of gel filtration, anion-exchange chromatography, and reverse-phase high performance liquid chromatography, we isolated an acidic protein which shows a single chain composition, with a molecular mass of approximately 8 kDa, estimated by SDS-polyacrylamide gel electrophoresis. Its N-terminal sequence has high similarity to disintegrins isolated from different snake venoms, which are known to bind to cellular integrins such as the GPIIb/IIIa fibrinogen receptor on platelets. The purified protein exerted potent aggregation inhibitory activity on ADP-stimulated human platelets in vitro, with an estimated IC50 of 50 nM. This biological activity, together with the biochemical characteristics observed, demonstrate that the protein isolated from B. asper venom is a disintegrin, hereby named bothrasperin. This is the first disintegrin isolated from Central American viperid snake species.


Assuntos
Humanos , Animais , Bothrops , Venenos de Crotalídeos , Desintegrinas , Inibidores da Agregação Plaquetária , Sequência de Aminoácidos , Plaquetas , Cromatografia , Desintegrinas , Eletroforese em Gel de Poliacrilamida , Dados de Sequência Molecular , Inibidores da Agregação Plaquetária
11.
Rev. biol. trop ; 50(3/4): 951-62, sept.-dic. 2002.
Artigo em Espanhol | LILACS | ID: lil-350079

RESUMO

This study analyzed the publications of authors from Costa Rican institutions that were included in the Science Citation Index (SCI) during 1999-2001. Out of the 722 references detected, distributed in 328 journals, 90.7 percent corresponded to original research articles. The total productivity figures showed a moderately increasing trend, both in absolute and population-adjusted terms, in concordance with previous data recorded for the period 1980-1998. The contribution of Revista de Biología Tropical to these figures corresponded to 10.0 percent, 8.9 percent, and 19.1 percent, for the years 1999, 2000, and 2001, respectively. The subject distribution of articles followed a similar pattern to that described for 1980-1998, with a predominance of biomedical (33.3 percent) and biological (27.5 percent) sciences, followed by agronomical (15.5 percent) sciences, chemistry (13.6 percent), physics (5.0 percent), geological sciences (3.6 percent), and mathematics (1.5 percent). Citation analyses for individual publications (up to July 15, 2002) revealed that only 45.2 percent of the articles had been cited at least once. The ten most cited references were analyzed, varying from 26 to 114 citations. The average citation per article was 2.60, and the average number of authors per article was 2.92. In agreement with data from 1980-1998, the University of Costa Rica appeared as the institution with highest productivity of SCI publications during 1999-2001, with a contribution of 50.0 percent. The percentage of publications performed without the participation of foreign co-authors showed a change in its decreasing trend of 1980-1998, stabilizing near the range of 25-30 percent during the period 1999-2001


Assuntos
Autoria , Bibliometria , Bases de Dados Bibliográficas , Publicação Periódica , Costa Rica
13.
Rev. costarric. cienc. méd ; 12(1/2): 1-6, mar.-jun. 1991. ilus
Artigo em Espanhol | LILACS | ID: lil-107692

RESUMO

Se describen los niveles de IgE sérica en una muestra de 69 niños con diagnóstico de asma bronquial, de la meseta central de Costa Rica, así como de 33 niños aparentemente sanos, sin historia clínica de alergias, y de 20 adultos donadores de sangre. La comparación mostró un mayor promedio de IgE sérica en el grupo de niños asmáticos con respecto al grupo control, así como una mayor frecuencia de niveles de IgE muy aumentados (>1000 kU/l) en los niños asmáticos. Los valores de IgE hallados en los niños aparentemente sanos son más similares a los descritos en poblaciones de países tropicales que de países de Europa y Norteamérica. Se realizó una comparación entre un método inmunoenzimático y uno radioinmune para la cuantificación de IgE y se obtuvo un coeficiente de correlación de 0,947


Assuntos
Asma/enzimologia , Imunoglobulinas , Costa Rica , Técnicas Imunoenzimáticas , Hipersensibilidade Respiratória/etiologia
14.
Rev. biol. trop ; 38(2A): 325-6, nov. 1990.
Artigo em Espanhol | LILACS | ID: lil-94923

RESUMO

The ability of serum from nine newborn specimens of Clelia clelia (Colubridae) to neutralize hemorrhagic action of Bothrops asper venom was tested. All serum samples neutralized completely the hemorrhagic effect of teh venon in mice. This findings shows that teh neutralizing ability f C. clelia serum towards the hemorrhagic activiry of B. asper venom in innate


Assuntos
Camundongos , Animais , Antivenenos/farmacologia , Hemorragia/prevenção & controle , Venenos de Serpentes , Venenos de Crotalídeos/antagonistas & inibidores , Testes de Neutralização
15.
Rev. costarric. cienc. méd ; 10(1): 1-10, mar. 1989. ilus
Artigo em Espanhol | LILACS | ID: lil-325333

RESUMO

En el presente trabajo se investigó el efecto del suero antiofídico, polivalente, producido en Costa Rica, sobre la actividad hemo-i-tica (CH50) del complemento sérico humano (in vitro) y del conejo (in vitro e in vivo). Mediante experimentos in vitro, se encontró actividad anticomplementaria significativa en ambas especies, tanto con suero antiofídico líquido como con suero liofilizado y reconstruido. Para determinar la relevancia in vivo del fenómeno observado in vitro, se utilizó un modelo experimental en conejos. Se inyectó a los animales una dosis de suero antiofídico de 2 ml/kg por vía intravenosa, y sus niveles de complemento sérico se determinaron a los 0 (antes de la inyección), 15,60 y 120 minutos. Se encontró una disminución significativa de la actividad del complemento sérico, evidente desde los quince minutos después de la administración del suero polivalente. También se investigó el efecto del suero antiofídico sobre el nivel componente C3 en suero humano, in vitro. No se encontró variación significativa en este parámetro, mediante la técnica de inmunodifusión radial. La actividad anticomplementaria ejercida por el suero antiofídico podría explicar, al menos parcialmente, la aparición de reacciones adversas tempranas, de tipo anafilactoide, en algunos pacientes, luego de su administración en el tratamiento de mordeduras de serpiente. (Rev. Cost. Cienc. Méd. 1989; 10(1-10)


Assuntos
Animais , Coelhos , Soros Imunes , Técnicas In Vitro , Venenos de Serpentes , Serpentes , Costa Rica
16.
Rev. costarric. cienc. méd ; 9(4): 57-64, dic. 1988. ilus
Artigo em Espanhol | LILACS | ID: lil-324603

RESUMO

Se describen los niveles de IgE sérica en una muestra de 69 niños con diagnóstico de asma bronquial, de la meseta central de Costa Rica, así como de 33 niños aparentemente sanos, sin historia clínica de alergias, y de 20 adultos donadores de sangre. La comparación estadística mostró un mayor promedio de IgE sérica en el grupo de niños asmáticos con respecto al grupo control, así como una mayor frecuencia de niveles de IgE muy aumentados (>1000 kU/I) en los niños asmáticos. Los valores de IgE hallados en los niños aparentemente sanos son más similares a los descritos en poblaciones de países tropicales que de países de Europa y Norteamérica. Se realizó una comparación entre un método inmunoenzimático y uno radioinmune para la cuantificación de IgE y se obtuvo un coeficiente de correlación de 0,947.(Rev. Cost. Cienc. Méd. 1988, 9(4): 57-64


Assuntos
Humanos , Masculino , Feminino , Asma , Técnicas Imunoenzimáticas , Imunoglobulinas , Técnicas Imunológicas , Biomarcadores/análise , Radioimunodetecção/classificação , Costa Rica
17.
Rev. costarric. cienc. méd ; 9(2): 155-69, jun. 1988. ilus
Artigo em Espanhol | LILACS | ID: lil-94568

RESUMO

En este trabajo se revisan y discuten una serie de aspectos relativos a la produccion, estabilidad y capacidad neutralizante en el suero antiofidico polivalente producido en el Instituto Clodomiro Picado. Este suero hiperinmune, en su forma liquida, es estable por tres años en refrigeracion en tanto que la forma liofilizada es estable por 5 años, sin requerir refrigeracion. Los diferentes lotes de suero son uniformes en lo que respecta a su capacidad neutralizante contra las actividades toxicas de los venenos. La capacidad neutralizante de este suero a sido investigada mediante dos tipos de experimento:(a.aquellos a los que el suero se incuba con el veneno previo a su inoculacion en animales de experimentacion; y (b) aquellos en que el suero se administra por la via intravenosa a diferentes intervalos de tiempo despues de la inoculacion del veneno. Los resultados obtenidos señalan que el suero es eficiente en la neutralizacion de los efectos toxicos y enzimaticos inducidos por las serpientes costarricenses de la familia viperidae, cuando suero y veneno se incuban previo a su inoculacion. Esta neutralizacion tambien se ha demostrado contra venenos de serpientes de otros paises de centro y Sudaamerica. Por otra parte, cuando el suero se administra despues de innoculado el veneno, los efectos locales (mionecrosis, hemorragia local y edema) son neutralizados solo parcialmente, en tanto que los efectos letal y defibrinante se neutralizan con mayor eficacia estas observaciones se explican por el hecho de que los efectos locales se desencadenan con una rapidez tal que, cuando se administra el suero, ya se ha iniciado el desarrollo de estas alteraciones locales. Se concluye que el suero polivalente contiene anticuerpos eficaces en la neutralizacion de las actividades toxicas y enzimaticas de estos venenos; sin embargo, la neutralizacion de los efectos locales, en la practica, se hace dificil siendo necesaria una rapida administracion de un volumen suficiente de suero antiofidico


Assuntos
Humanos , Soros Imunes , Serpentes/imunologia , Costa Rica
18.
Rev. biol. trop ; 35(2): 339-40, nov. 1987. tab
Artigo em Inglês | LILACS | ID: lil-103730

RESUMO

En un grupo dee treinta y cuatro indígenas de varias localidades de los grupos Cabécar y Guaymí, en el sureste de Costa Rica, se determinó los niveles de IgG, IgA e IgM en suero, mediante inmunodifusión radial. Se comparó los resultados con los descritos en un grupo de adultos sanos costarricenses de zonas urbanas. Los niveles de inmunoglobulinas en el grupo de indígenas fueron mayores que los del grupo control


Assuntos
Adolescente , Adulto , Criança , Feminino , Masculino , Pessoa de Meia-Idade , Imunoglobulina A/análise , Imunoglobulina G/análise , Imunoglobulina M/análise , Indígenas Centro-Americanos , Costa Rica , Imunodifusão
19.
Rev. méd. Hosp. Nac. Niños Dr. Carlos Saenz Herrera ; 21(2): 179-85, dic. 1986. tab, ilus
Artigo em Espanhol | LILACS | ID: lil-43487

RESUMO

Se describe un programa en lenguaje "BASIC" para calcular la actividad hemolítica del complemento sérico, en U/ml, según el método descrito por Mata & Lomonte. Se demuestra, mediante un análisis retrospectivo de 86 muestras, que hay una alta correlación (r=0,9863) entre los valores CHSO obtenidos mediante el uso del programa, y los valores obtenidos por el método gráfico convencional. Se analiza algunas características ventajosas del programa, y se sugiere que el mismo puede sustituir al método convencional gráfico


Assuntos
Proteínas do Sistema Complemento/análise , Hemólise , Software
20.
Rev. costarric. cienc. méd ; 7(1): 41-7, mar. 1986. tab, ilus
Artigo em Espanhol | LILACS | ID: lil-48383

RESUMO

En el presente trabajo se estandariza un método simple y cuantitativo para la determinación de la actividad hemolítica (CH50) del complemento sérico. Con este método, se evalúa los niveles de complemento en una muestra de la población adulta costarricense, y a la vez, se introduce un método de control de calidad en dicha técnica. Los valores obtenidos en los adultos sanos estudiados (n=53) se distribuyeron en un ámbito entre 71 y 128 U/ml, con un promedio de 93 U/ml y una desviación estándar de 14 U/ml


Assuntos
Adolescente , Adulto , Pessoa de Meia-Idade , Humanos , Proteínas do Sistema Complemento/análise , Costa Rica , Valores de Referência
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