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Validated Immunochemical Assay for Comprehensive Determination of the Human Epidermal Growth Factor Receptor 2 Released from and Bound to Cells
Published on: May 9, 2025
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Upconversion nanoparticle-based ligase-assisted method for specific and sensitive detection of T790M mutation in
Peng Wang1, Padmanabh Joshi1, Abdulrahman Alazemi1
1Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, USA.
Biosensors & Bioelectronics
|July 5, 2014
Summary
A novel method detects the T790M mutation in epidermal growth factor receptor (EGFR) using upconversion nanoparticles and SYBR Green I. This highly sensitive assay accurately identifies EGFR T790M mutations, crucial for targeted cancer therapies.
Area of Science:
- Biochemistry
- Molecular Biology
- Nanotechnology
Background:
- Epidermal growth factor receptor (EGFR) mutations are key drivers in non-small cell lung cancer.
- The T790M mutation confers resistance to existing EGFR tyrosine kinase inhibitors.
- Sensitive detection of T790M is critical for guiding treatment decisions.
Purpose of the Study:
- To develop a highly specific and sensitive method for detecting the EGFR T790M mutation.
- To optimize detection parameters for improved performance.
Main Methods:
- Utilized luminescent resonance energy transfer (LRET) between upconversion nanoparticles and SYBR Green I.
- Employed a ligase-mediated assay with DNA probes and thermal cycling for signal amplification.
- Investigated factors including probe design, ligation conditions, and thermal cycles.
Main Results:
- Achieved high specificity, differentiating T790M from wild-type EGFR at a 1:100 ratio.
- Demonstrated high sensitivity, detecting as little as 0.01 picomoles of EGFR T790M mutant.
- Optimized assay parameters for enhanced detection performance.
Conclusions:
- The developed LRET-based method offers a sensitive and specific approach for EGFR T790M mutation detection.
- This assay has potential applications in clinical diagnostics and personalized cancer therapy.
- Further optimization could enhance its utility in real-world settings.
