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Microfluidic Chip for the Detection of Biological Toxic Effects of Polychlorinated Biphenyls on Neuronal Cells

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The aim of this study was to develop a microfluidic neuronal cell chip device to monitor the toxic effects of polychlorinated biphenyls (PCBs) on PC-12 neuronal cells. PCBs adversely influence the activities of neuronal cells in the nervous system. In PC-12 cells, the production and secretion of dopamine decreases in response to PCB exposure. The microfluidic device that we developed to measure the amount of dopamine by cyclic voltammetry is composed of a control layer, a fluidic layer, and a gold electrode-patterned glass wafer. The control channel in the control layer functions as a microvalve to control the flow of the fluidic channel in the fluidic layer. The fluidic layer consists of 3 reaction chambers as well as fluidic channels. Three electrodes, including the working electrode, counter electrodes, and a reference electrode, are placed in a fluidic chamber. The electrochemical signals of dopamine, either from a standard dopamine solution or from the culture supernatant from cultured PC-12 cells, were obtained using a fabricated microfluidic neuronal cell chip by cyclic voltammetry. When PCBs were added to cultures of PC-12 cells, the amount of dopamine secreted from the PC-12 cells decreased due to the reduced activity of PC-12 cells. The fabricated neuronal cell chip was capable of detecting the toxic effect of dopamine on neuronal cells at concentrations of 10 μg/L and over. The practicality of the developed microfluidic neuronal cell chip was validated using river water spiked with PCBs.
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Document Type: Research Article

Publication date: May 1, 2013

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  • Journal of Biomedical Nanotechnology (JBN) is a peer-reviewed multidisciplinary journal providing broad coverage in all research areas focused on the applications of nanotechnology in medicine, drug delivery systems, infectious disease, biomedical sciences, biotechnology, and all other related fields of life sciences.
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