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Si Microanemones Integrated Microfluidic Chip for Highly Efficient Isolation of Extracellular Vesicles
Hanyue Kang1, Lei Qiu2,3, Yecheng Li4
1Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Key Laboratory of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, China.
Advanced Healthcare Materials
|May 21, 2025
Summary
A novel bio-inspired microfluidic chip effectively isolates tumor extracellular vesicles (EVs) from blood. This breakthrough enables sensitive, non-invasive cancer detection and monitoring using liquid biopsy techniques.
Area of Science:
- Biotechnology and Biomedical Engineering
- Nanotechnology
- Cancer Research
Background:
- Liquid biopsy offers promise for early cancer detection and treatment monitoring.
- Challenges exist in isolating tumor-derived extracellular vesicles (EVs) from bodily fluids due to background noise.
- Efficient isolation of EVs is crucial for accurate biomarker analysis.
Purpose of the Study:
- To develop and evaluate a novel microfluidic chip for enhanced isolation of extracellular vesicles (EVs).
- To improve the sensitivity and specificity of cancer detection through improved EV isolation.
- To enable non-invasive monitoring of cancer biomarkers in clinical samples.
Main Methods:
- Fabrication of a bio-inspired 3D silicon microanemone (SMA) microfluidic chip using a two-step lithographic method and nanosphere lithography.
- Computational fluid dynamics simulations to analyze the chip's hierarchical structure and fluid dynamics.
- Performance assessment using clinical blood samples, coupled with RT-qPCR for quantifying cancer-related mRNA (ACTB) in isolated EVs.
Main Results:
- The SMA microfluidic chip achieved an impressive EV isolation efficiency of 89.4%.
- The hierarchical structure and chaotic mixer design enhanced EV-antibody interactions.
- The chip demonstrated high sensitivity and specificity in isolating cancer-related EV subgroups from clinical samples.
Conclusions:
- The developed SMA microfluidic chip significantly improves the isolation of tumor-derived EVs.
- This technology facilitates non-invasive and precise detection of cancer biomarkers via liquid biopsy.
- The findings hold potential for advancing early cancer diagnosis and patient management strategies.
