Abstract
In this study, we developed a sensitive quartz crystal microbalance (QCM) sensor which employs the anti-ovarian tumor associated antigen 1 (OVTA 1) IgY polyclonal chicken antibodies on the crystal surface for the detection of OVTA 1 in human serum. The anti-OVTA 1 IgY antibodies were anchored on the thiol-activated sensor surface using 1-ethyl-3[3-dimethylaminopropyl] carbodiimide hydrochloride/N-hydroxysuccinimide (EDC-NHS) coupling. The responses for different concentrations of anti-OVTA 1 antibody were also studied and 40 μg/mL was favorable for homogenous antibody coverage. The QCM sensor was used to monitor both immobilization and the target binding affinity. The anti-OVTA 1 antibody based QCM has allowed the competent detection of OVTA 1 in a high linear range of 0.5-10 μg/mL. The total time needed to complete the detection was as short as 5-6 h. The regeneration studies demonstrated that the proposed sensor was reusable up to 9 cycles with a slight loss in binding affinity. The detection of OVTA 1 in human serum allows a potential exploitation of the anti-OVTA 1 polyclonal antibody based QCM immunoassay for the screening of OVTA 1 antigen.
Original language | English |
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Pages (from-to) | 2073-2078 |
Number of pages | 6 |
Journal | Materials Science and Engineering C |
Volume | 32 |
Issue number | 7 |
DOIs | |
Publication status | Published - Oct 1 2012 |
Keywords
- Human serum
- Immunosensors
- OVTA 1 antigen
- Ovarian cancer
- Polyclonal chicken IgY antibodies
- QCM
ASJC Scopus subject areas
- General Medicine