||Nagao, A. T; Ramos, O. L; Pereira, A. B.|
||Immunoassays of secretory IgA and secretory component|
||Braz. j. med. biol. res = Rev. bras. pesqui. méd. biol;23(3/4):211-24, 1990. ilus, tab.
||Apresentado em: Brazilian Congress of Imunology, 11, Caxambu, oct. 9-11, 1986.
||1. A sandwich-type enzyme-linked immunosorbent (ELISA) is described for quantitation of secretory IgA (sIgA) in human serum, as well as an ELISA and a radioimmunoassay (RIA) for measurement of secretory component (SC) is human serum. Samples were reduced and alkylated prior to the measurement of SC. 2. Healthy individuals (N = 53) presented low levels of SC (median, 0.9 mg/l). The protein levels were significantly elevated when compared with the controls, in sera of women during the second (N = 31; median, 1.5 mg/l) and third (N = 35; median, 2.4 mg/l) and acute viral hepatitis (N = 25; median 2.4 mg/l). SC levels of women in the first trimester of pregnancy (N = 24; median, 0.5 mg/l) did not differ from the controls. 3. sIgA levels were also significantly elevated when sera of women in the third trimester of pregnancy (N = 41; median, 25.4 mg/l) and sera of patients with alcoholic cirrhosis (N = 32; median, 75.0 mg/l) or acute viral hepatitis (N = 38; median, 28.5 mg/l) were compared with controls (N = 49; median, 9.0 mg/l). women in the first (N = 25; median, 7.7 mg/l) and second (N = 29; median, 10.2 mg/l trimester of pregnancy did not present levels statistically different from the controls. 4. The results obtained for SC by RIA and ELISA were positively correlated (rs = 0.88; P < 0.001). sIgA levels determined by ELISA were also positively correlated with the results of RIA-SC(rs = 0.77;P<0.001) or ELISA-SC (rs = 0.79; P < 0.001). 5. The assays described are specific, relatively simple to perform, and can be useful for the study of the secretory system|
||Ensaio de Imunoadsorção Enzimática|
Imunoglobulina A Secretora/análise
||-Anticorpos Anti-Idiotípicos/isolamento & purificação|
Hepatite Viral Humana/sangue
Imunoglobulina A Secretora/imunologia
Imunoglobulina A Secretora/isolamento & purificação
Cirrose Hepática Alcoólica/sangue
Primeiro Trimestre da Gravidez/sangue
Terceiro Trimestre da Gravidez/sangue
Componente Secretório/isolamento & purificação
||BR26.1 - Biblioteca Central|