Abstract
A high serum HER-2 extracellular domain (sHER-2 ECD) level has a reverse association with tumor behaviors. In this study, a portable platform for the disease biomarker sHER-2 ECD detection has been established using a pressure-based bioassay. The pressure bioassay consists of a monoclonal antibody immobilized on an eight-well strip, the analyte HER-2, and another monoclonal antibody labeled with the Pt nanoparticles (PtNPs), which have the catalytic ability to decompose H2O2 into H2O and O2(g). The increased pressure due to O2(g) generation is measured by a hand-held pressure meter. A total of 34 serum samples were collected to validate the performance of the pressure bioassay. The results showed that the pressure bioassay platform of HER-2 had a dynamic range from 2 to 50 ng/mL with a limit of detection (LOD) of 2 ng/mL, which was consistent with the ELISA result. In the real serum samples, there was a significant correlation between sHER-2 ECD level and several clinicopathological parameters, especially tissue HER-2 status. Furthermore, the sHER-2 ECD level was found to decrease after targeted therapy in a patient with tHER-2 positive. Overall, this bioassay can facilitate breast cancer diagnosis and prognosis in clinical scenarios and resource-limited areas.
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Abbreviations
- CLIA:
-
Chemiluminescence immunoassay
- CRP:
-
C-reactive protein
- ELISA:
-
Enzyme-linked immunosorbent assay
- ER:
-
Estrogen receptor
- FDA:
-
US Food and Drug Administration
- HER-2:
-
Human epidermal growth factor receptor type 2
- MMP-9:
-
Matrix metalloprotein-9
- OS:
-
Overall survival
- PASS:
-
Pressure-based bioassay
- POCT:
-
Point-of-care testing
- PR:
-
Progesterone receptor
- PtNPs:
-
Pt nanoparticles
- sHER-2 ECD:
-
Serum HER-2 extracellular domain
- tHER-2:
-
Tissue HER-2
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Funding
This work was supported by the Major Scientific Research Program of PLA, China (No. AWS17J009) and National Natural Science Foundation of P.R. China (No. 81101904).
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The authors declare that all individual participants from whom the serum samples were obtained gave informed consent, and the studies have been approved by the Affiliated Chenggong Hospital, Xiamen University Ethics Committee and have been performed in accordance with ethical standards.
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Tao, Q., Wu, X., Lin, Q. et al. Portable detection of serum HER-2 in breast cancer by a pressure-based platform. Anal Bioanal Chem 410, 7489–7498 (2018). https://doi.org/10.1007/s00216-018-1364-4
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DOI: https://doi.org/10.1007/s00216-018-1364-4