ABSTRACT
PURPOSE: To investigate morbidity, mortality and microbiological response to fecal peritonitis induced in Wistar rats with permanent bilateral carotid ligation (PBCL). METHODS: Fecal peritonitis was induced in 30 rats, with 10 animals in each group: Group1 - normal young animals; Group2 - normal mature animals; and Group3 - rats with PBCL after four months postoperative follow-up. Peritonitis was induced with 10% stool suspension. Morbidity and mortality were evaluated. The survival animals after seven days were euthanized for tests. For microbiological studies blood were collected from the carotids and right ventricle; and fragments of lung and peritoneum. RESULTS: The morbidity and mortality of young animals were significantly lower than in mature animals with and without PBCL. There was no difference in morbidity and mortality among mature rats with and without PBCL. The diversity of microorganisms producing septicemia was similar to native micro biota of the large bowel. CONCLUSIONS: The immune response was more efficient in young animals, represented by significant less morbidity and no natural mortality. PBLC did not affect morbidity and mortality in mature rats. The immune response to fecal peritonitis has age as an independent predictor.
Subject(s)
Animals , Male , Rats , Carotid Arteries/pathology , Peritoneum/pathology , Peritonitis/pathology , Carotid Arteries/immunology , Feces , Lung/immunology , Lung/pathology , Peritoneum/immunology , Peritonitis/immunology , Peritonitis/mortality , Rats, Wistar , Time Factors , Tissue AdhesionsABSTRACT
Recent clinical trials have shown the possibility of probiotics in prevention and treatment of allergic diseases. The purpose of this experimental study was to assess the influence of lysed Enterococcus faecalis FK-23 (LFK) on allergic responses in different mouse strains. We performed a comparative study on the effects of LFK for allergen-induced peritoneal accumulation of eosinophils and serum total IgE concentration by using BALB/c, C57BL/6, C3H/HeN and C3H/HeJ mice. There was no significant difference in total number of peritoneal accumulated cells induced by cedar pollen allergen between the control and LFK groups in any strain of mice (p > 0.05); however, the ratio of eosinophils to total accumulated cells was significantly decreased in LFK-treated mice of BALB/c (p = 0.016), C3H/HeN (p = 0.010) and C3H/HeJ (p = 0.004), but not C57BL/6 (p > 0.05). No significant difference in serum total IgE concentration was found between the control and LFK groups of different mouse strains (p > 0.05). These results reveal a different effect of LFK on suppressing allergen-induced local eosinophila in inbred strains of mice, suggesting the effectiveness of probiotics on limiting allergy might be under the influence of individual genetic background.
Subject(s)
Animals , Antigens, Plant , Cryptomeria , Enterococcus faecalis/chemistry , Eosinophils/immunology , Female , Immunoglobulin E/blood , Immunosuppression Therapy , Leukocyte Count , Mice , Mice, Inbred Strains , Peritoneum/immunology , Pharmaceutical Preparations/administration & dosage , Pollen , Rhinitis, Allergic, Seasonal/blood , Species SpecificityABSTRACT
Phagocytic, germ tube inducing and candidacidal activities were investigated in monolayers of peritoneal macrophages of rats. The phagocytic activities observed in macrophages of the healthy rats in the presence of normal serum, those in the presence of immune serum and of immunized rats in the presence of normal serum were 40%, 45.3% and 44.8% respectively. The percent of macrophages in which intracellular Candida formed germ tubes in the above three situations were 10, 9.59 and 10.19, respectively and the percent of intracellular Candida that formed germ tubes were 6.6, 3.7 and 4.1, respectively. The candidacidal activity observed in the above three sets of macrophages were 5.33%, 22.66% and 19.88%, respectively. Induction of germ tube in C. albicans in supplemented tissue culture medium containing normal serum was 15 per cent. These observations indicate that immunisation/sensitisation of individuals with C. albicans organisms does provide some degree of cell mediated immunity by activating macrophages. This may partly be due to the appearance of specific antibodies. It is likely that this type of immunity can be produced by subclinical infections during invasion by the commensal organism thus preventing further invasion establishment of infection and keeping the organism (C. albicans) in a state of commensalism. However, the degree of immunity so produced is so low that predisposing factors suppress it and allow establishment of infection.
Subject(s)
Animals , Candida albicans/immunology , Candidiasis/immunology , Cell Culture Techniques , Disease Models, Animal , Immunity, Cellular , Macrophages/immunology , Peritoneum/immunology , RatsABSTRACT
Se presenta el análisis sistemático del estado de inmunidad en el compartimiento peritoneal de mujeres con endometriosis. Se analizaron 25 pacientes que se distribuyeron en los siguientes grupos A. Endometriosis y B. Esterilidad de causa no identificada. En todas las pacientes se capturó líquido peritoneal (LP) durante laparoscopía diagnóstica y de modo simultáneo se tomó muestra de sangre periférica. Ambas muestras fueron procesadas para análisis de subpoblaciones de linfocitos (ASL) por citometría de flujo utilizando anticuerpos monoclonales con reactividad a linfocitos T totales (CD3+), linfocitos B (CD19+), auxiliares/inductores (CD3+CD4+), supresores/citotóxicos (CD3+CD8)n NK (CD3-CD16++56+). El ASL peritoneales de los dos grupos se caracterizó por disminución pronunciada en linfocitos B, disminución moderada de activadores, incremento pronunciado de supresores, relación CD4+/CD8+ alterada en favor de la supresión y disminución de NK al compararlos con su propio compartimiento sanguíneo. Todos los valores anteriores fueron idénticos para los dos grupos y la única diferencia significativa se encontró al comparar la subpoblación de linfocitos T activados que fue menor en los LP de mujeres con endometriosis. Es este el único dato que apoya la existencia de inmunidad alterada en el peritoneo de estas pacientes, que afecta la expresión de linfocitos activados. Sin embargo tomando como criterio el resto de las subpoblaciones, tanto en la endometriosis con en la ECNI el microambiente se inclina a la supresión y no son distinguibles entre sí. Por otro lado, se inició la caracterización de la señal que condiciona la inducción de supresión de activación de linfocitos en el ambiente peritoneal de mujeres con endometriosis. Se analizaron 10 muestras de LP de pacientes utilizando linfocitos periféricos purificados por gradiente de densidad de donadoras voluntarias normales fértiles. Las células fueron cultivadas y estimuladas in vitro con Concanavalina A en presencia de Timidina H. En los pozos experimentales se agrego el LP en concentración dosis-respuesta y se evaluó la diferencia en síntesis de ADN radiactivo contra las células incubadas en ausencia de LP. Fue posible demostrar la presencia de factores asociados al LP de las pacientes con endometriosis que la proliferación de linfocitos estimulados con ConA no así en muestras de ECNI. La existencia de estos factores permite suponer la presencia de señales solubles que condicionan la supresión inmunológica local
Subject(s)
Humans , Female , Antibodies, Monoclonal , B-Lymphocytes , Endometriosis/immunology , Flow Cytometry , Laparoscopy , Peritoneum/immunology , T-Lymphocytes , T-Lymphocytes, Helper-Inducer , T-Lymphocytes, RegulatoryABSTRACT
Se estudia la historia clínica de un lactante de 10 meses de edad, quien fue hospitalizado por la expulsión a través del ano de la extremidad distal de un catéter de derivación ventrículoperitoneal que había sido implantado por hidrocefalia congénita. Se discute el mecanismo probable de la reducción espontánea del tubo y la forma de abordar el manejo de esta rara complicación