Fast and Sensitive Interferon-γ Assay Using Supercritical Angle Fluorescence

Autor: Stefan Seeger, Thomas Ruckstuhl, Christian M. Winterflood
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: Biosensors, Vol 3, Iss 1, Pp 108-115 (2013)
Druh dokumentu: article
ISSN: 2079-6374
DOI: 10.3390/bios3010108
Popis: We present an immunoassay for Interferon-γ (IFN-γ) with a limit of detection of 1.9 pM (30 pg/mL) and a linear concentration range spanning three orders of magnitude. The developed one-step assay takes only 12 min and can replace the time-consuming and labor-intensive enzyme-linked immunosorbent assay (ELISA). The solid-phase sandwich assay is performed on a new measurement system comprising single-use test tubes and a compact fluorescence reader. The polymer tubes contain an optical configuration for the detection of supercritical angle fluorescence, allowing for highly sensitive real-time binding measurements.
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