Sensitive detection of idiotypic platelet-reactive alloantibodies by an electrical protein chip.
Biosens Bioelectron
; 36(1): 207-11, 2012.
Article
en En
| MEDLINE
| ID: mdl-22572157
ABSTRACT
To prevent and treat immune-mediated platelet disorders (e.g. neonatal allo-immune thrombocytopenia and platelet transfusion refractoriness) the causative idiotypic platelet-reactive antibodies have to be detected with high sensitivity and specificity. The "Monoclonal Antibody Immobilization Platelet Assay" (MAIPA) is the diagnostic gold standard for immunotyping sera with respect to alloantibodies against human platelet antigens (HPA). However, it is labor-intensive and time-consuming. In this work, an automated protein chip assay (enzyme-linked sandwich immunoassay) based on interdigitated gold microelectrodes in combination with an electrical read-out system was developed and optimized. For this purpose, specific capture antibodies were immobilized on the gold electrodes. The binding of the target is detected via an enzyme-labeled detection antibody by a redox-recycling process that corresponds to the amount of bound target molecule. With this electrical chip assay it is possible to detect antibodies against HPA-1a, HPA-5b and HLA with high sensitivity and specificity in less than half the duration of the MAIPA protocol with similar intra- and interassay variance.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Técnicas Biosensibles
/
Antígenos de Plaqueta Humana
/
Análisis por Matrices de Proteínas
/
Isoanticuerpos
/
Anticuerpos Monoclonales
Tipo de estudio:
Diagnostic_studies
/
Guideline
Idioma:
En
Revista:
Biosens Bioelectron
Asunto de la revista:
BIOTECNOLOGIA
Año:
2012
Tipo del documento:
Article