TY - JOUR
T1 - Hydroxylated polychlorinated biphenyl detection based on a genetically engineered bioluminescent whole-cell sensing system
AU - Turner, Kendrick
AU - Xu, Shifen
AU - Pasini, Patrizia
AU - Deo, Sapna
AU - Bachas, Leonidas
AU - Daunert, Sylvia
PY - 2007/8/1
Y1 - 2007/8/1
N2 - The metabolites of polychlorinated biphenyls (PCBs), such as hydroxylated PCBs (OH-PCBs), have been identified as environmental contaminants. Various studies have shown that some OH-PCBs can potentially contribute to health problems. Detection of these compounds in environmental and biological samples could provide useful information about their levels and lead to a better understanding of their apparent toxicity. To that end, we have developed a whole-cell sensing system for the detection of OH-PCBs by taking advantage of the recognition of a group of related compounds, i.e., hydroxylated biphenyls, by the product of the hbpR gene in the hbp operon from Pseudomonas azelaica strain HBP1. By fusing the luxAB genes, encoding the reporter protein bacterial luciferase, to the hbp regulator-promoter sequence, a whole-cell sensing system was developed. Here, we describe the optimization and application of this whole-cell sensing system for the detection of a model compound, 2-hydroxy-3′,4′-dichlorobiphenyl. A detection limit of 1 × 10-8 M was achieved using this system. The detection of a broad range of individual OH-PCBs as well as an OH-PCB mixture was investigated. The system can detect OH-PCBs in whole serum samples in a trace amount, which is comparable to the detection of these analytes in medium alone. We envision that the method developed can potentially be employed as a rapid and sensitive way to monitor OH-PCBs for toxicological study in the laboratory, as well as a useful tool to evaluate the presence of bioavailable OH-PCBs in natural environments.
AB - The metabolites of polychlorinated biphenyls (PCBs), such as hydroxylated PCBs (OH-PCBs), have been identified as environmental contaminants. Various studies have shown that some OH-PCBs can potentially contribute to health problems. Detection of these compounds in environmental and biological samples could provide useful information about their levels and lead to a better understanding of their apparent toxicity. To that end, we have developed a whole-cell sensing system for the detection of OH-PCBs by taking advantage of the recognition of a group of related compounds, i.e., hydroxylated biphenyls, by the product of the hbpR gene in the hbp operon from Pseudomonas azelaica strain HBP1. By fusing the luxAB genes, encoding the reporter protein bacterial luciferase, to the hbp regulator-promoter sequence, a whole-cell sensing system was developed. Here, we describe the optimization and application of this whole-cell sensing system for the detection of a model compound, 2-hydroxy-3′,4′-dichlorobiphenyl. A detection limit of 1 × 10-8 M was achieved using this system. The detection of a broad range of individual OH-PCBs as well as an OH-PCB mixture was investigated. The system can detect OH-PCBs in whole serum samples in a trace amount, which is comparable to the detection of these analytes in medium alone. We envision that the method developed can potentially be employed as a rapid and sensitive way to monitor OH-PCBs for toxicological study in the laboratory, as well as a useful tool to evaluate the presence of bioavailable OH-PCBs in natural environments.
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U2 - 10.1021/ac0705162
DO - 10.1021/ac0705162
M3 - Article
C2 - 17602671
AN - SCOPUS:34547812492
VL - 79
SP - 5740
EP - 5745
JO - Industrial And Engineering Chemistry Analytical Edition
JF - Industrial And Engineering Chemistry Analytical Edition
SN - 0003-2700
IS - 15
ER -