Accession Number:

ADA595677

Title:

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

Descriptive Note:

Journal article

Corporate Author:

ARMY CENTER FOR ENVIRONMENTAL HEALTH RESEARCH FORT DETRICK MD

Report Date:

2012-03-24

Pagination or Media Count:

12.0

Abstract:

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 p 0.001 for all storage times tested. This poikilothermic cell line has toxicant sensitivity comparable to a mammalian cell line bovine lung microvessel endothelial cells BLMVECs that was tested on fluidic biochips with the same chemicals. In order to remain viable, the BLMVEC biochips required media replenishments 3 times per week while being maintained at 37 C. The ability of RTgill-W1 biochips to maintain monolayer integrity without media replenishments for 78 weeks, combined with their chemical sensitivity and rapid response time, make them excellent candidates for use in low cost, maintenance-free field-portable biosensors.

Subject Categories:

  • Medicine and Medical Research
  • Toxicology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE