Isolamento e identificação de mimetopos de auto-antígenos para utilização em imunodiagnóstico da artrite idiopática juvenil
AUTOR(ES)
Galber Rodrigues Araujo
FONTE
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia
DATA DE PUBLICAÇÃO
30/06/2011
RESUMO
CHAPTER 2: Juvenile Idiopathic Arthritis (JIA) is a set of chronic diseases characterized by persistent inflammation of joints. "Idiopathic" means that no one knows the cause of illness and "Juvenile" in this case means that the onset of symptoms occurs before 16 years of age. The diagnosis of JIA is clinical and is based on the finding of arthritis in one or more joints, lasting less than six weeks. It is essential that several diseases such as infections are investigated and removed, since arthritis is a common manifestation of various rheumatic and non-rheumatic diseases. Therefore, studies that are aimed at investigating new biomarkers become of great importance for the diagnosis of JIA. The aim of this study was to select and identify peptides recognized by antibodies purified from the serum of patients with JIA by Phage Display technology. For selection of peptides was performed a bioppaning using a peptide library Ph.D.-C7C expressed on the surface of filamentous phage M13. The DNA from selected clones was sequenced, translated, and several clones were subjected to ELISA assays and bioinformatics. Among the 192 clones sequenced, 100 had valid sequences, which were identified 40 different sequences. The bioinformatics analysis showed that there are similarities between most of the selected peptides and proteins highly expressed in patients with JIA. ELISA allowed the pre-validation of a clone with a potential biomarker for the serological immunodiagnosis of JIA.
ASSUNTO(S)
marcadores sorológicos phage display imunodiagnóstico genetica artrite idiopática juvenil juvenile idiopathic arthritis phage display immunodiagnostic
