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Updated: Jul 9, 2025
Author Spotlight: FISH as a Tool for Precise Gene Amplification Assessment in Cancer Specimens
Published on: July 12, 2024
Detecting EGFR gene amplification using a fluorescence in situ hybridization platform based on digital microfluidics
Chuanjie Shen1, Cheng Zhan2, Zhaoduo Tong1
1State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
A new digital microfluidics-based fluorescence in situ hybridization (DMF-FISH) platform automates EGFR amplification detection for non-small cell lung cancer (NSCLC). This automated system offers comparable performance to traditional methods while significantly reducing probe consumption.
Area of Science:
- Biotechnology
- Molecular Diagnostics
- Oncology
Background:
- Epidermal growth factor receptor (EGFR) gene signaling is crucial in tumor progression.
- EGFR amplification in non-small cell lung cancer (NSCLC) predicts sensitivity to tyrosine kinase inhibitors.
- Traditional fluorescence in situ hybridization (FISH) for EGFR amplification is labor-intensive and time-consuming.
Purpose of the Study:
- To develop and validate a fully automated digital microfluidics-based FISH (DMF-FISH) platform.
- To streamline the detection of EGFR amplification in NSCLC.
- To reduce the complexity and resource requirements of FISH assays.
Main Methods:
- Development of a DMF-FISH system integrating a DMF chip, heating array, and signal processing.
- Automated execution of FISH steps including cell digestion, hybridization, and staining.
- Testing of the DMF-FISH platform with cell lines and clinical samples.
Main Results:
- The DMF-FISH system successfully automated FISH operations without manual intervention.
- The platform demonstrated comparable diagnostic performance to conventional benchtop FISH.
- DMF-FISH reduced DNA probe consumption by 87% compared to the traditional method.
Conclusions:
- The automated DMF-FISH platform offers a feasible and efficient alternative for EGFR amplification detection.
- This technology has significant potential for improving clinical diagnosis and personalized therapy in NSCLC.
- DMF-FISH addresses the limitations of traditional FISH, enhancing accessibility and reducing costs.
