TY - JOUR
T1 - Paper strip whole cell biosensors
T2 - A portable test for the semiquantitative detection of bacterial quorum signaling molecules
AU - Struss, Anjali
AU - Pasini, Patrizia
AU - Ensor, C. Mark
AU - Raut, Nilesh
AU - Daunert, Sylvia
PY - 2010/6/1
Y1 - 2010/6/1
N2 - Herein, we report the development of a novel, inexpensive, and portable filter-paper-based strip biosensor for the detection of bacterial quorum sensing signaling molecules, N-acylhomoserine lactones (AHLs). AHLs are generally employed by Gram-negative bacteria for their cell-cell communication to control expression of specialized genes, such as those involved in biofilm formation and production of virulence factors, in a population-density-dependent manner. First, a bacterial cell-based sensing system employing components of AHL-mediated QS regulatory system as recognition elements and β-galactosidase as the reporter protein was designed and developed. The bacterial-sensing cells were then liquid-dried on strips of filter paper. β-Galactosidase as the reporter allows for the visual monitoring of the analyte-induced signal when a colorimetric method of detection is applied. The paper strip biosensor was able to detect low AHL concentrations down to 1 × 10-8 M. Furthermore, it was successfully applied to the detection of AHLs in physiological samples, such as saliva. The filter-paper-based sensing strips could provide reproducible results upon storage at 4 C for at least 3 months. In conclusion, a filter-paper-based strip biosensor was developed that allows for visual, fast, and convenient detection of AHLs in a dose-dependent manner in a test sample. In addition, it does not require expensive equipment or trained personnel and allows ease of transportation and storage. Therefore, we envision that this biosensor will serve as a simple and economical portable field kit for on-site monitoring of AHL in a variety of clinical and environmental samples.
AB - Herein, we report the development of a novel, inexpensive, and portable filter-paper-based strip biosensor for the detection of bacterial quorum sensing signaling molecules, N-acylhomoserine lactones (AHLs). AHLs are generally employed by Gram-negative bacteria for their cell-cell communication to control expression of specialized genes, such as those involved in biofilm formation and production of virulence factors, in a population-density-dependent manner. First, a bacterial cell-based sensing system employing components of AHL-mediated QS regulatory system as recognition elements and β-galactosidase as the reporter protein was designed and developed. The bacterial-sensing cells were then liquid-dried on strips of filter paper. β-Galactosidase as the reporter allows for the visual monitoring of the analyte-induced signal when a colorimetric method of detection is applied. The paper strip biosensor was able to detect low AHL concentrations down to 1 × 10-8 M. Furthermore, it was successfully applied to the detection of AHLs in physiological samples, such as saliva. The filter-paper-based sensing strips could provide reproducible results upon storage at 4 C for at least 3 months. In conclusion, a filter-paper-based strip biosensor was developed that allows for visual, fast, and convenient detection of AHLs in a dose-dependent manner in a test sample. In addition, it does not require expensive equipment or trained personnel and allows ease of transportation and storage. Therefore, we envision that this biosensor will serve as a simple and economical portable field kit for on-site monitoring of AHL in a variety of clinical and environmental samples.
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U2 - 10.1021/ac100231a
DO - 10.1021/ac100231a
M3 - Article
C2 - 20465229
AN - SCOPUS:77953006343
VL - 82
SP - 4457
EP - 4463
JO - Industrial And Engineering Chemistry Analytical Edition
JF - Industrial And Engineering Chemistry Analytical Edition
SN - 0003-2700
IS - 11
ER -