Long-Term Storage and Impedance-Based Water Toxicity Testing Capabilities of Fluidic Biochips Seeded with RTgill-W1 Cells.

摘要

Rainbow trout gill epithelial cells (RTgill-W1) are used in a cell- based biosensor that can respond within one hour to toxic chemicals that have the potential to contaminate drinking water supplies. RTgill-W1 cells seeded on enclosed fluidic biochips and monitored using electric cell-substrate impedance sensing (ECIS) technology responded to 18 out of the 18 toxic chemicals tested within one hour of exposure. Nine of these chemical responses were within established concentration ranges specified by the U.S. Army for comparison of toxicity sensors for field application. The RTgill-W1 cells remain viable on the biochips at ambient carbon dioxide levels at 6 C for 78 weeks without media changes. RTgill-W1 biochips stored in this manner were challenged with 9.4 lM sodium pentachlorophenate (PCP), a benchmark toxicant, and impedance responses were significant.