Single-cell-based sensors and synchrotron FTIR spectroscopy: a hybrid system towards bacterial detection.

Single-cell-based sensors and synchrotron FTIR spectroscopy: a hybrid system towards bacterial detection. Research Abstract Details 

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Single-cell-based sensors and synchrotron FTIR spectroscopy: a hybrid system towards bacterial detection. Abstract Text:

Mandana Veiseh,Omid Veiseh,Michael C Martin,Carolyn Bertozzi,Miqin Zhang,Mandana Veiseh,Omid Veiseh,Michael C Martin,Carolyn Bertozzi,Miqin Zhang,

Microarrays of single macrophage cell-based sensors were developed and demonstrated for potential real-time bacterium detection by synchrotron FTIR microscopy. The cells were patterned on gold electrodes of silicon oxide substrates by a surface engineering technique, in which the gold electrodes were immobilized with fibronectin to mediate cell adhesion and the silicon oxide background was passivated with polyethylene glycol (PEG) to resist protein adsorption and cell adhesion. Cell morphology and IR spectra of single, double, and triple cells on gold electrodes exposed to lipopolysaccharide (LPS) of different concentrations were compared to reveal the detection capability of this cell-based sensing platform. The single-cell-based system was found to generate the most significant and consistent IR spectrum shifts upon exposure to LPS, thus providing the highest detection sensitivity. Changes in cell morphology and IR shifts upon cell exposure to LPS were found to be dependent on the LPS concentration and exposure time, which established a method for the identification of LPS concentration and infected cell population. Possibility of using this single-cell system with conventional IR spectroscopy as well as its limitation was investigated by comparing IR spectra of single-cell arrays with gold electrode surface areas of 25, 100, and 400 microm2 using both synchrotron and conventional FTIR spectromicroscopes. This cell-based platform may potentially provide real-time, label-free, and rapid bacterial detection, and allow for high-throughput statistical analyses, and portability.

Single-cell-based sensors and synchrotron FTIR spectroscopy: a hybrid system towards bacterial detection. Publishing Authors By Initials

M Veiseh,O Veiseh,MC Martin,C Bertozzi,M Zhang,M Veiseh,O Veiseh,MC Martin,C Bertozzi,M Zhang,

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Single-cell-based sensors and synchrotron FTIR spectroscopy: a hybrid system towards bacterial detection. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Biosensors & bioelectronics

VOLUME: 23

Page Numbers: 253-60

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ISSN: 0956-5663

DAY: 27

MONTH: 04

YEAR: 2007

Single-cell-based sensors and synchrotron FTIR spectroscopy: a hybrid system towards bacterial detection. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Single-cell-based sensors and synchrotron FTIR spectroscopy: a hybrid system towards bacterial detection.

AFFILIATION: Department of Materials Science & Engineering, University of Washington, WA 98195-2120, USA.

Country: England

AGENCY: United States NIGMS

GRANT: R01 GM075095-02

ACRONYM: GM

MEDLINETA: Biosens Bioelectron

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