Capillary electrophoresis-laser-induced fluorescence (CE-LIF)-based immunoassay for quantifying antibodies against cyclic citrullinated peptides.
Analyst
; 143(13): 3141-3147, 2018 Jul 07.
Article
em En
| MEDLINE
| ID: mdl-29877533
ABSTRACT
We developed an assay for diagnosing rheumatoid arthritis (RA) by capillary electrophoresis with the laser-induced fluorescence detection (CE-LIF) of antibodies against cyclic citrullinated peptides (CCPs) using fluorescein isothiocyanate-labeled F-CCP11A and F-CCP. The CCPs were incubated overnight with a purified antibody against CCP and then injected into the CE-LIF system to estimate complex concentration. The immunocomplexes and free peptides were separated within 5 min; the LOD and LOQ values of the immunoassay are 0.1 µg mL-1 and 0.3 µg mL-1, respectively. The calibration curves for the immunocomplex had a coefficient of determination of 0.98. The reproducibility of the CE-LIF based immunoassay when using F-CCP11A and F-CCP was less than 5% and the accuracy ranged between 89 and 103%. The applicability of the assay was evaluated using serum samples from RA patients and healthy control subjects. We found that the sensitivity and specificity for RA diagnosis were 100% and 83.3%, respectively, for F-CCP11A and 100% and 90%, respectively, for F-CCP. These results demonstrate that the CE-LIF method can be useful for quantitative immunoassay development.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Artrite Reumatoide
/
Imunoensaio
/
Eletroforese Capilar
/
Anticorpos Antiproteína Citrulinada
Tipo de estudo:
Diagnostic_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article