[Clinical diagnostic value of potential polypeptides associated with rheumatoid arthritis].
Zhonghua Yi Xue Za Zhi
; 89(27): 1889-91, 2009 Jul 21.
Article
en Zh
| MEDLINE
| ID: mdl-19953910
ABSTRACT
OBJECTIVE:
To obtain the mimotope recognized by anti-keratin antibody (AKA) by screening a phage random peptide library and evaluate its diagnostic value.METHODS:
IgG was purified from AKA positive pooled serum of rheumatoid arthritis (RA) patients by 33.3% (NH4)2SO4 (AKA measured with indirect immunofluorescence). Then the antibody was used as the ligand for biopanning of a 12-mer phage random peptide library. The serum of patients with RA, SLE and normal people were detected with the positive clone by indirect ELISA.RESULTS:
After 4 rounds of screening, the peptide of mimotope associated with RA was acquired. The diagnostic specificity, positive predictive value and Youden's index were 95.6%, 90% and 155.6% respectively. Its amino acid sequence was QSESAGPTTSRR. This sequence was similar to 137-148 amino acid sequence of human filaggrin.CONCLUSION:
The RA-associated peptide is acquired by screening a phage random peptide library using polyclonal AKA of RA patients. It may be a specific diagnostic tool of RA.
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Banco de datos:
MEDLINE
Asunto principal:
Péptidos
/
Artritis Reumatoide
/
Biblioteca de Péptidos
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
/
Risk_factors_studies
Límite:
Adolescent
/
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
Zh
Año:
2009
Tipo del documento:
Article