A Flexible Terahertz Metamaterial Biosensor for Cancer Cell Growth and Migration Detection

Area of Science:

• Biomedical Engineering
• Materials Science
• Cancer Research

Background:

• Metamaterial biosensors are vital for cell identification and tumor biomarker detection.
• In situ, non-destructive methods for measuring cell migration are crucial for understanding tumor progression and metastasis.

Purpose of the Study:

• To develop a flexible terahertz metamaterial biosensor for label-free, non-destructive detection of breast cancer cell growth and migration.
• To investigate the role of transform growth factor-beta (TGF-β) in promoting cancer cell migration.

Main Methods:

• Fabrication of a flexible terahertz metamaterial biosensor on a parylene C substrate.
• Culturing MDA-MB-231 breast cancer cells on the biosensor surface.
• Utilizing a polydimethylsiloxane (PDMS) barrier sheet to quantify cell growth rate.
• Analyzing resonance peak frequency shifts to correlate with cell coverage and migration patterns.
• Investigating the effect of TGF-β on cell migration.

Main Results:

• The metamaterial biosensor achieved a maximum resonance peak frequency shift of 183.2 GHz after 72 hours of culturing MDA-MB-231 cells.
• The cell growth rate was quantified as 14.9 µm/h using a PDMS barrier sheet.
• Experimental results showed a linear relationship between peak shift and covered area, and a quadratic relationship with distance, consistent with simulations.
• The study confirmed that TGF-β promotes breast cancer cell migration.

Conclusions:

• The developed terahertz metamaterial biosensor enables label-free and non-destructive detection of breast cancer cell growth and migration.
• The biosensor provides quantitative data on cell behavior, crucial for understanding tumor metastasis.
• This technology holds significant potential for future investigations in cell biology and cancer research.