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Selective concentration of human cancer cells using contactless dielectrophoresis

Henslee, Erin, Sano, Michael B, Rojas, Andrea D, Schmelz, Eva M and Davalos, Rafael V (2011) Selective concentration of human cancer cells using contactless dielectrophoresis Electrophoresis, 32 (18). pp. 2523-2529.

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This work is the first to demonstrate the ability of contactless dielectrophoresis (cDEP) to isolate target cell species from a heterogeneous sample of live cells. Since all cell types have a unique molecular composition, it is expected that their dielectrophoretic (DEP) properties are also unique. cDEP is a technique developed to improve upon traditional and insulator-based DEP devices by replacing embedded metal electrodes with fluid electrode channels positioned alongside desired trapping locations. Through the placement of the fluid electrode channels and the removal of contact between the electrodes and the sample fluid, cDEP mitigates issues associated with sample/electrode contact. MCF10A, MCF7, and MDA-MB-231 human breast cells were used to represent early, intermediate, and late-staged breast cancer, respectively. Trapping frequency responses of each cell type were distinct, with the largest difference between the cells found at 20 and 30 V. MDA-MB-231 cells were successfully isolated from a population containing MCF10A and MCF7 cells at 30 V and 164 kHz. The ability to selectively concentrate cells is the key to development of biological applications using DEP. The isolation of these cells could provide a workbench for clinicians to detect transformed cells at their earliest stage, screen drug therapies prior to patient treatment, increasing the probability of success, and eliminate unsuccessful treatment options.

Item Type: Article
Divisions : Researcher Development Programme
Authors :
Sano, Michael B
Rojas, Andrea D
Schmelz, Eva M
Davalos, Rafael V
Date : 26 August 2011
OA Location : 10.1002/elps.201100081
Copyright Disclaimer : Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Uncontrolled Keywords : Clausius–Mossotti factor; Dielectrophoresis; Enrichment; Microfluidics; Sample isolation
Depositing User : Jane Hindle
Date Deposited : 23 Jun 2017 13:36
Last Modified : 16 Jan 2019 18:53

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