Consulta: creatorFacets:"Atta,A.M."
Registros recuperados: 4
Data/hora: 10/06/2024 01:27:06

Detection of specific IgE antibodies in parasite diseases
Provedor de dados: 56
Autores: Souza-Atta,M.L.B.; Araújo,M.I.; D'Oliveira Júnior,A.; Ribeiro-de-Jesus,A.; Almeida,R.P.; Atta,A.M.; Carvalho,E.M.
Activation of Th1 or Th2 cells is associated with production of specific immunoglobulin isotypes, offering the opportunity to use antibody measurement for evaluation of T cell function. Schistosomiasis and visceral leishmaniasis are diseases associated with Th2 activation. However, an IgE response is not always detected in these patients. In the present study we evaluated specific IgE antibodies to S. mansoni and L. chagasi antigens by ELISA after depletion of serum IgG with protein G immobilized on Sepharose beads or RF-absorbent (purified sheep IgG antibodies anti-human IgG). In schistosomiasis patients, specific IgE to SWAP antigen was demonstrable in only 10 of 21 patients (48%) (mean absorbance ± SD = 0.102 ± 0.195) when unabsorbed serum was used....
Tipo: Info:eu-repo/semantics/other
Palavras-chave: IgE antibodies; Immunoassays; Schistosomiasis mansoni; Visceral leishmaniasis; Kala-azar.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000900008

Antiphospholipid antibodies in Brazilian hepatitis C virus carriers
Provedor de dados: 56
Autores: Atta,A.M.; Estevam,P.; Paraná,R.; Pereira,C.M.; Leite,B.C.O.; Sousa-Atta,M.L.B.
Hepatitis C, a worldwide viral infection, is an important health problem in Brazil. The virus causes chronic infection, provoking B lymphocyte dysfunction, as represented by cryoglobulinemia, non-organ-specific autoantibody production, and non-Hodgkin's lymphoma. The aim of this research was to screen for the presence of antiphospholipid autoantibodies in 109 Brazilian hepatitis C virus carriers without clinical history of antiphospholipid syndrome. Forty healthy individuals were used as the control group. IgA, IgG, and IgM antibodies against cardiolipin and β2-glycoprotein I were measured with an enzyme-linked immunosorbent assay, using a cut-off point of either 20 UPL or 20 SBU. While 24 (22.0%) hepatitis C carriers had moderate titers of IgM...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Hepatitis C virus; Antiphospholipid antibody; Brazilian patients.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000600009

Autoantibody production in chronic idiopathic urticaria is not associated with Helicobacter pylori infection
Provedor de dados: 56
Autores: Atta,A.M.; Rodrigues,M.Z.A.; Sousa,C.P.; Medeiros Júnior,M.; Sousa-Atta,M.L.B.
Chronic idiopathic urticaria (CIU) is a dermatological syndrome, characterized by raised erythematous skin lesions, that affects 20% of the general population and has been associated with autoimmunity. However, some reports have also suggested a close relationship between CIU and Helicobacter pylori infection, which is endemic in developing countries and associated with chronic gastritis, peptic ulcer disease, and gastric carcinoma. In the present study, we investigated the occurrence of autoantibodies in sera from 23 CIU subjects infected with H. pylori and from 23 CIU subjects without this infection. The presence of anti-thyroid antibodies was determined by indirect hemagglutination assay and the presence of autoantibodies to IgE and C1INH was determined...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Chronic idiopathic urticaria; Autoimmunity; Autoantibodies; Helicobacter pylori.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000100002

Immunoglobulin E and systemic lupus erythematosus
Provedor de dados: 56
Autores: Atta,A.M.; Sousa,C.P.; Carvalho,E.M.; Sousa-Atta,M.L.B.
Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by intense polyclonal production of autoantibodies and circulating immune complexes. Some reports have associated SLE with a Th2 immune response and allergy. In the present study 21 female patients with SLE were investigated for total IgE and IgE antibodies to dust house aeroallergens by an automated enzyme-linked fluorescent assay, and were also evaluated for antinuclear IgE autoantibodies by a modified indirect immunofluorescence test using HEp-2 cells as antigen substrate. Additionally, immunocapture ELISA was used to investigate serum anti-IgE IgG autoantibodies. Serum IgE above 150 IU/ml, ranging from 152 to 609 IU/ml (median = 394 IU IgE/ml), was observed in 7 of 21 SLE...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Systemic lupus erythematosus; Antinuclear IgE antibody; Allergy; IgG anti-IgE; IgE.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001000008