Implementation of an Integrated Dielectrophoretic and Magnetophoretic Microfluidic Chip for CTC Isolation
Identification of circulating tumor cells (CTCs) from a majority of various cell pools has been an appealing topic for diagnostic purposes. This study numerically demonstrates the isolation of CTCs from blood cells by the combination of dielectrophoresis and magnetophoresis in a microfluidic chip. T...
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MDPI AG
2022-09-01
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| Series: | Biosensors |
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| Online Access: | https://www.mdpi.com/2079-6374/12/9/757 |
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| author | Kai Zhao Penglu Zhao Jianhong Dong Yunman Wei Bin Chen Yanjuan Wang Xinxiang Pan Junsheng Wang |
| author_facet | Kai Zhao Penglu Zhao Jianhong Dong Yunman Wei Bin Chen Yanjuan Wang Xinxiang Pan Junsheng Wang |
| author_sort | Kai Zhao |
| collection | DOAJ |
| description | Identification of circulating tumor cells (CTCs) from a majority of various cell pools has been an appealing topic for diagnostic purposes. This study numerically demonstrates the isolation of CTCs from blood cells by the combination of dielectrophoresis and magnetophoresis in a microfluidic chip. Taking advantage of the label-free property, the separation of red blood cells, platelets, T cells, HT-29, and MDA-231 was conducted in the microchannel. By using the ferromagnet structure with double segments and a relatively shorter distance in between, a strong gradient of the magnetic field, i.e., sufficiently large MAP forces acting on the cells, can be generated, leading to a high separation resolution. In order to generate strong DEP forces, the non-uniform electric field gradient is induced by applying the electric voltage through the microchannel across a pair of asymmetric orifices, i.e., a small orifice and a large orifice on the opposite wall of the channel sides. The distribution of the gradient of the magnetic field near the edge of ferromagnet segments, the gradient of the non-uniform electric field in the vicinity of the asymmetric orifices, and the flow field were investigated. In this numerical simulation, the effects of the ferromagnet structure on the magnetic field, the flow rate, as well as the strength of the electric field on their combined magnetophoretic and dielectrophoretic behaviors and trajectories are systemically studied. The simulation results demonstrate the potential of both property- and size-based cell isolation in the microfluidic device by implementing magnetophoresis and dielectrophoresis. |
| first_indexed | 2024-03-10T00:34:39Z |
| format | Article |
| id | doaj.art-ab065bfc838b4ea8a4199d690d5a86aa |
| institution | Directory Open Access Journal |
| issn | 2079-6374 |
| language | English |
| last_indexed | 2024-03-10T00:34:39Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biosensors |
| spelling | doaj.art-ab065bfc838b4ea8a4199d690d5a86aa2023-11-23T15:18:39ZengMDPI AGBiosensors2079-63742022-09-0112975710.3390/bios12090757Implementation of an Integrated Dielectrophoretic and Magnetophoretic Microfluidic Chip for CTC IsolationKai Zhao0Penglu Zhao1Jianhong Dong2Yunman Wei3Bin Chen4Yanjuan Wang5Xinxiang Pan6Junsheng Wang7Liaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, ChinaLiaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, ChinaLiaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, ChinaLiaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, ChinaLiaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, ChinaLiaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, ChinaLiaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, ChinaLiaoning Key Laboratory of Marine Sensing and Intelligent Detection, Dalian Maritime University, Dalian 116026, ChinaIdentification of circulating tumor cells (CTCs) from a majority of various cell pools has been an appealing topic for diagnostic purposes. This study numerically demonstrates the isolation of CTCs from blood cells by the combination of dielectrophoresis and magnetophoresis in a microfluidic chip. Taking advantage of the label-free property, the separation of red blood cells, platelets, T cells, HT-29, and MDA-231 was conducted in the microchannel. By using the ferromagnet structure with double segments and a relatively shorter distance in between, a strong gradient of the magnetic field, i.e., sufficiently large MAP forces acting on the cells, can be generated, leading to a high separation resolution. In order to generate strong DEP forces, the non-uniform electric field gradient is induced by applying the electric voltage through the microchannel across a pair of asymmetric orifices, i.e., a small orifice and a large orifice on the opposite wall of the channel sides. The distribution of the gradient of the magnetic field near the edge of ferromagnet segments, the gradient of the non-uniform electric field in the vicinity of the asymmetric orifices, and the flow field were investigated. In this numerical simulation, the effects of the ferromagnet structure on the magnetic field, the flow rate, as well as the strength of the electric field on their combined magnetophoretic and dielectrophoretic behaviors and trajectories are systemically studied. The simulation results demonstrate the potential of both property- and size-based cell isolation in the microfluidic device by implementing magnetophoresis and dielectrophoresis.https://www.mdpi.com/2079-6374/12/9/757dielectrophoresisCTC separationmagnetophoresismicrofluidic chip |
| spellingShingle | Kai Zhao Penglu Zhao Jianhong Dong Yunman Wei Bin Chen Yanjuan Wang Xinxiang Pan Junsheng Wang Implementation of an Integrated Dielectrophoretic and Magnetophoretic Microfluidic Chip for CTC Isolation Biosensors dielectrophoresis CTC separation magnetophoresis microfluidic chip |
| title | Implementation of an Integrated Dielectrophoretic and Magnetophoretic Microfluidic Chip for CTC Isolation |
| title_full | Implementation of an Integrated Dielectrophoretic and Magnetophoretic Microfluidic Chip for CTC Isolation |
| title_fullStr | Implementation of an Integrated Dielectrophoretic and Magnetophoretic Microfluidic Chip for CTC Isolation |
| title_full_unstemmed | Implementation of an Integrated Dielectrophoretic and Magnetophoretic Microfluidic Chip for CTC Isolation |
| title_short | Implementation of an Integrated Dielectrophoretic and Magnetophoretic Microfluidic Chip for CTC Isolation |
| title_sort | implementation of an integrated dielectrophoretic and magnetophoretic microfluidic chip for ctc isolation |
| topic | dielectrophoresis CTC separation magnetophoresis microfluidic chip |
| url | https://www.mdpi.com/2079-6374/12/9/757 |
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