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A two-compartment microfluidic device for long-term live cell detection based on surface plasmon resonance.
Biomicrofluidics 2016 July
A two-compartment microfluidic device integrated with a surface plasmon resonance (SPR) interferometric imaging system has been developed for long-term and real-time cell detection. The device uses a porous membrane sandwiched between two chambers to obtain an exact medium exchange rate and minimal fluid shear stress for cell culture. The two-compartment device was optimized by COMSOL simulations and fabricated using Poly (dimethylsiloxane) elastomer replica molding methods. To confirm the capability of the microfluidic device to maintain the cell physiological environment over long intervals, HeLa cells were cultured in the device for up to 48 h. The cell proliferation process was monitored by both SPR and microscopic time-lapse imaging. The SPR response showed four phases with different growth rates, and agreed well with the time-lapse imaging. Furthermore, real-time detection of cell behaviors under different doses of Paclitaxel and Cisplatin was performed. The SPR responses revealed dose-dependent inhibitions of cell proliferation, with distinct drug action kinetics.
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