Analysis of antigen-specific antibodies and their isotypes in experimental malaria.
Cytometry A
; 71(4): 242-50, 2007 Apr.
Article
em En
| MEDLINE
| ID: mdl-17252581
ABSTRACT
BACKGROUND:
Measuring antibody production in response to antigen exposure or vaccination is key to disease prevention and treatment. Our understanding of the mechanisms involved in the antibody response is limited by a lack of sensitive analysis methods. We address this limitation using multiplexed microsphere arrays for the semi -quantitative analysis of antibody production in response to malaria infection.METHODS:
We used microspheres as solid supports on which to capture and analyze circulating antibodies. Antigen immobilized on beads captured antigen-specific antibodies for semi- quantitative analysis using fluorescent secondary antibodies. Anti-immunoglobulin antibodies on beads captured specific antibody isotypes for affinity estimation using fluorescent antigen.RESULTS:
Antigen-mediated capture of plasma antibodies enables determination of antigen-specific antibody "titer," a semi-quantitative parameter describing a convolution of antibody abundance and avidity, as well as parameters describing numbers of antibodies bound/bead at saturation and the plasma concentration-dependent approach to saturation. Results were identical in single-plex and multiplex assays, and in qualitative agreement with similar parameters derived from ELISA-based assays. Isotype-specific antibody-mediated capture of plasma antibodies allowed the estimation of the affinity of antibody for antigen.CONCLUSION:
Analysis of antibody responses using microspheres and flow cytometry offer significant advantages in speed, sample size, and quantification over standard ELISA-based titer methods.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Anticorpos Antiprotozoários
/
Malária
/
Antígenos de Protozoários
Tipo de estudo:
Qualitative_research
Limite:
Animals
Idioma:
En
Revista:
Cytometry A
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos
País de publicação:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
/
US
/
USA