Abstract
Profiling tumor cells present in blood based on multiple tumor-relevant markers can identify specific subpopulations of tumor cells and provide extensive information on the tumor status. Herein we present a simple approach for the analysis of tumor cells based on a combination of alternating current electrohydrodynamic (ac-EHD)-induced fluid flow for capture, release, and subsequent recapture of cells from biological fluids. Initially, tumor cell isolation was achieved using an epithelial cell adhesion molecule (EpCAM) antibody-modified ac-EHD device. Following this, captured cells were released using a DC potential pulse. Subsequently, the released cells were recaptured under ac-EHD on a separate device to specifically capture tumor derived (e.g., human epidermal growth factor receptor 2 (HER2)) cell population. We demonstrate this proof-of-concept approach for the analysis of breast cancer cells from blood samples using a purpose-built ac-EHD device. Under the optimal ac-EHD field strength, 64.8 ± 2.6% ...
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