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Single Cells as Biosensors for Chemical Separations

Science
6 Jan 1995
Vol 267, Issue 5194
pp. 74-77

Abstract

A biosensor system based on the response of living cells was demonstrated that can detect specific components of a complex mixture fractionated by a microcolumn separation technique. This system uses ligand-receptor binding and signal-transduction pathways to biochemically amplify the presence of an analyte after electrophoretic separation. The transduced signal was measured by means of two approaches: (i) fluorescence determination of intracellular calcium concentrations in one or more rat PC-12 cells and (ii) measurement of transmembrane current in a Xenopus laevis oocyte microinjected with messenger RNA that encodes a specific receptor. This analysis system has the potential to identify biologically active ligands present in a complex mixture with exceptional sensitivity and selectivity.

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References

ABDELLATIF, M.S., ENZYME-BASED FIBER OPTIC SENSOR FOR GLUCOSE DETERMINATION, ANALYTICAL LETTERS 21: 943 (1988).
BRIGGS, C.A., ACTIVATION OF THE 5-HT1C RECEPTOR EXPRESSED IN XENOPUS OOCYTES BY THE BENZAZEPINES SCH-23390 AND SKF-38393, BRITISH JOURNAL OF PHARMACOLOGY 104: 1038 (1991).
BUSH, A.B., NERVE GROWTH-FACTOR POTENTIATES BRADYKININ-INDUCED CALCIUM INFLUX AND RELEASE IN PC12 CELLS, JOURNAL OF NEUROCHEMISTRY 57: 562 (1991).
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