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Author

Mitchell, Robert J.
Applied & Environmental Microbiology Lab (AEML)
Research Interests
  • Pathogens, bdellovibrio bacteriovorus, patho-biotechnology

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Characterization and optimization of two methods in the immobilization of 12 bioluminescent strains

Cited 16 times inthomson ciCited 15 times inthomson ci
Title
Characterization and optimization of two methods in the immobilization of 12 bioluminescent strains
Author
Mitchell, Robert J.Gu, MB
Keywords
Agar; High throughput array; Immobilization; Recombinant bioluminescent bacteria; Sol-gel
Issue Date
200608
Publisher
ELSEVIER ADVANCED TECHNOLOGY
Citation
BIOSENSORS & BIOELECTRONICS, v.22, no.2, pp.192 - 199
Abstract
Twelve recombinant bioluminescent bacteria have been immobilized within the wells of a 96-well plate using two different matrices-agar and sol-gel. All 12 strains were immobilized within individual wells of the plates and the sensitivity of the strains and the stability of the responses were determined for select chemicals. Each strain was exposed to seven well-characterized chemicals over a wide range of concentrations to demonstrate their individual selectivity for specific toxicants. Although the sensitivity of the immobilized cells was generally lower than cultures grown in liquid media, they were comparable. For example, strain DPD1710, which responds to DNA damage was able to detect mitomycin C, a genotoxin, at a minimum concentration of 0.6 ppb. When immobilized, the lower limit of detection was between 1 and 10 ppb. Finally, using compounds that are known to elicit a response from each of the strains, the stability of the bioluminescent responses were measured over an extended period of 4 weeks. Although the activity of several strains decreased over time, the majority of the strains used in both immobilized systems were still responsive.
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DOI
http://dx.doi.org/10.1016/j.bios.2005.12.019
ISSN
0956-5663
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