A simple microfluidic aggregation analyzer for the specific, sensitive and multiplexed quantification of proteins in a serum environment.
Biosens Bioelectron
; 77: 1062-9, 2016 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-26556184
ABSTRACT
Portable and low-cost platforms for protein biomarker detection are highly sought after for point of care applications. We demonstrate a simple microfluidic device for the rapid, electrically-based detection of proteins in serum. Our aggregation analyzer relies on detecting the protein-induced aggregation of sub-micron particles, using a one-step procedure followed by a fast, particle-by-particle measurement with a very high count rate. This enables the rapid and precise quantification of C-Reactive protein levels, within the clinically relevant range, using unprocessed human serum and a disposable microfluidic device; no optics are involved in the implementation. Due to the single particle detection format and the use of microfluidics, only a small volume of serum (~50 nL) is needed to complete the analysis. The method can be easily extended to multiplexed biomarker detection by combining an assay using differently sized particles, each targeting a separate protein. We illustrate this by using two sizes of latex beads and demonstrating the simultaneous detection of two different proteins in a serum environment with minimal cross-interference. This confirms that our aggregation analyzer platform provides a simple and straightforward method for multiplexed biomarker detection in a low cost, portable design.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Análisis Químico de la Sangre
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Inmunoensayo
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Proteínas Sanguíneas
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Mezclas Complejas
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Dispositivos Laboratorio en un Chip
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
Biosens Bioelectron
Asunto de la revista:
BIOTECNOLOGIA
Año:
2016
Tipo del documento:
Article
País de afiliación:
Estados Unidos