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1.
Ars pharm ; 53(3): 1-6, jul.-sept. 2012. tab
Artigo em Inglês | IBECS | ID: ibc-103748

RESUMO

Objetivo: Evaluar la actividad del extracto metanólico de la corteza del tallo de la Bauhinia Racemosa Lam en ratones albinos suizos. Material y métodos: La inmunidad humoral específica fue evaluada mediante el ensayo de hemaglutinación de antincuerpos ( H.A. Titer) y la inmunidad no específica fue evaluada mediante el test de aclaramiento de carbono y el test de adhesión de neutrofilos. Resultados: se encontró que el extracto del tallo de Bauhinia racemosa (MEBR) era efectivo para el incremento del H.A Titer. La respuesta primaria y secundaria no mostró un ascenso significativo en el H.A Titer en el grupo con estado inmune normal al compararlo con el grupo control. Sin embargo, en el grupo de inmunodeprimidos donde la inmunidad estaba suprimida mediante ciclofosfamida se observó un aumento significativo en el H.A Titer (p<0.01) a dosis de 200mg/kg cuando se comparaba con la ciclofosfamida. El extracto del tallo de Bauhinia racemosa mostró un aumento significativo (p<0,05) en la actividad fagocítica a dosis de 200mg/kg (p.o) en el test de aclaramiento de carbón. En el test de adhesión de neutrófilos el extracto del tallo de Bauhinia racemosa mostró un aumento significativo (p<0,01) del porcentaje de adhesión de neutrófilos a dosis de 200mg/kg (p.o) Conclusión: El presente estudio sostiene al MEBR como un prometedor agente inmunomodulador(AU)


Aim: To evaluate immunomodulatory activity of methanolic extract of stem bark of Bauhinia racemosa Lam swiss albino mice. Material and Methods: The specific humoral immunity was assessed by performing hemagglutinating antibody titer (H.A.Titer) and the non-specific immunity was assessed by performing carbon clearance test and neutrophil adhesion test. Results: The methanolic extract of stem bark of Bauhinia Racemosa (MEBR) was found effective in increasing the H.A.Titer. Primary and secondary antibody response showed no significant rise in H.A.Titer in normal immune status group when compared with control group, whereas in immunosupressed group, where immunity was suppressed by cyclophosphamide, significant rise in H.A.Titer (p<0.01) was observed at dose of 200 mg/kg (p.o.) when compared with cyclophosphamide. MEBR showed significant increase (p<0.05) in phagocytic activity at dose of 200 mg/kg (p.o.) in carbon clearance test. In neutrophil adhesion test MEBR showed significant (p<0.01) rise in percentage neutrophil adhesion at dose of 200 mg/kg (p.o.). Conclusion: Present study, therefore, reveals that MEBR) holds promise as immunomodulatory agent(AU)


Assuntos
Animais , Camundongos , Bauhinia , Extratos Vegetais/farmacocinética , Imunomodulação , Neutrófilos , Fagócitos , Camundongos
2.
Allergol. immunopatol ; 37(6): 302-308, nov.-dic. 2009. tab
Artigo em Inglês | IBECS | ID: ibc-77016

RESUMO

Background: Patients with atopic dermatitis frequently present recurrent infections by pyogenic bacteria or by intracellular microorganisms, suggesting an immune disorder. Objective: Laboratorial investigation of phagocyte activity and chemotactic response by neutrophilic polymorphonuclear and mononuclear phagocytes in the peripheral blood of patients with atopic dermatitis from moderate to severe. Methods: Through a transversal study, patients with atopic dermatitis from moderate to severe were selected. The neutrophilic and mononuclear phagocytes were separated and the phagocytic ingestion of zymosan particles was analysed, in addition to migration distance to the bacterial lipopolysaccharide chemotactic factor, comparing the results to the values obtained from healthy individuals within the same age group. Results: Nineteen patients were selected, 11 female and 8 male. The mean age was 6.47 years (±4.65). Among the 19 patients studied, 14 (73.68%) presented a reduction in the neutrophilic and mononuclear phagocyte activity, with two (1.53%) patients presenting a reduction in the activity of both phagocytes. Conclusion: Our results demonstrated a reduction in chemotactic response and phagocytic activity by neutrophilic and/or mononuclear phagocytes in the majority of patients with atopic dermatitis from moderate to severe. Our results were coherent with the clinical data concerning the higher incidence of infections by pyogenic bacteria and fungi in patients with atopic dermatitis, which are microorganisms that require defence by the phagocytes researched in the present study (AU)


Assuntos
Humanos , Masculino , Feminino , Criança , Adolescente , Adulto , Pessoa de Meia-Idade , Dermatite Atópica , Dermatite Atópica/terapia , Fagócitos , Neutrófilos , Leucócitos Mononucleares , Quimiotaxia , Fagocitose , Estudos Transversais , Relatos de Casos
3.
Inmunología (1987) ; 25(2): 115-130, abr.-jun. 2006. ilus, tab
Artigo em Es | IBECS | ID: ibc-054679

RESUMO

Los receptores tipo Toll (TLR) se conocen clásicamente por su expresión en las células presentadoras de antígeno (APC) donde participan en el reconocimiento de estructuras moleculares asociadas a los patógenos (PAMP) que no están presentes en las células del hospedero. Sin embargo, como lo demuestran varios estudios recientes, los TLR tienen una distribución tisular mucho más amplia, pueden reconocer moléculas derivadas de los tejidos lesionados del hospedero y desencadenan respuestas no solo inmunes sino también metabólicas y de comportamiento propias de los estados de enfermedad. De acuerdo con estas observaciones es posible considerar a los TLR como receptores de señales de peligro tanto exógenas como endógenas, y por tanto como un puente entre la teoría del reconocimiento de lo no propio infeccioso y la teoría del peligro, lo cual plantea una serie de repercusiones que van más allá de la respuesta inmune


Toll like receptors (TLR) are classically known by their expression in antigen Presenting Cells (APC), where they participate in recognition of pathogen molecular patterns (PAMP), absent in host cells. However, recent studies show a broader tissue spectrum for TLR expression, being able to recognize molecules derived from injured host tissue and triggering immune, metabolic and behavioral responses typically observed in disease stages. Based on the latter observations, it is feasible to consider TLR as receptors for «danger signals» derived from exogenous and endogenous injuries and therefore as a bridge between two immunological theories; the non-infectious self recognition and the danger theory. The latter assumption has implications beyond the immune response


Assuntos
Humanos , Receptores Imunológicos/imunologia , Imunidade Inata , Proteína da Polipose Adenomatosa do Colo/imunologia , Linfócitos/imunologia , Fagócitos/imunologia , Fibroblastos/imunologia , Adipócitos/imunologia , Antígenos Heterófilos/imunologia , Microglia/imunologia , Osteoblastos/imunologia
5.
An. R. Acad. Farm ; 71(2): 365-386, abr. 2005. ilus
Artigo em Es | IBECS | ID: ibc-041333

RESUMO

El estallido respiratorio de los fagocitos, producido por la NADPH-oxidasa, complejo enzimático que cataliza la formación de radical superóxido, constituye una de las fuentes endógenas más importantes de especies reactivas del oxígeno en el organismo. Este sistema comprende un complejo flavocitocromo b558 unido a membrana, y factores citosolicos p47phox, p67phox, p40phox y la pequeña GTPasa Rac2, que se trastocan a la membrana plasmática donde experimentan un proceso de ensamblaje que conforma el sistema enzimático activo. El conocimiento de las interacciones proteina-proteína que permiten el ensamblaje y el mecanismo de acción enzimático, ha permitido detectar los cambios que transcurren en el estado activo. La importancia de la NADPH oxidasa se muestra en la enfermedad granulomatosa crónica, patología transmitida por herencia, en la cual un componente de la NADPH oxidasa está ausente o defectivo. Tales individuos padecen infecciones recurrentes crónicas y severas debido a la incapacidad de sus neutrófilos para destruir microbios


The phagocyte respiratory burst produced by the NADPH oxidase, enzyme complex which catalyzes the production of superoxide radical, is one of the main endogenous sources of reactive oxygen species in the body. NADPH oxidase consists of a membrane-bound flavocytochrome b558 complex, and cytosolic factors p47phox, p67phox, p40phox and the small GTPase Rac, which translocate to the membrane to assemble the active complex following cell activation. A great deal of current research involves understanding the protein protein interactions involved in the assembly and enzyme mechanism and how these change with the activation state. The importance of the NADPH oxidase is illustrated by the inherited condition Chronic Granulomatous Disease in which a component of the respiratory burst oxidase is absent or defective. Affected individuals suffer from recurrent, chronic and severe infections due to the inability of their neutrophils to kill microbes


Assuntos
Fagócitos/química , NADPH Oxidases/síntese química , NADPH Oxidases/farmacologia , NADPH Oxidases/farmacocinética , Doença Granulomatosa Crônica/induzido quimicamente , Doença Granulomatosa Crônica/tratamento farmacológico , Explosão Respiratória , Explosão Respiratória/fisiologia , Reperfusão/métodos , Mutagênese , Explosão Respiratória/imunologia , Fagócitos/fisiologia , Peróxido de Hidrogênio/farmacologia , Peróxido de Hidrogênio/farmacocinética , Radical Hidroxila/síntese química , Radical Hidroxila/farmacologia , Superóxidos/química , Superóxidos/farmacologia , Superóxidos/farmacocinética , Neoplasias/tratamento farmacológico
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