Antibody-free isolation of rare cancer cells from blood based on 3D lateral dielectrophoresis

I. Fang Cheng, Wei Lun Huang, Tzu Ying Chen, Chien Wei Liu, Yu De Lin, Wu Chou Su

研究成果: Article同行評審

85 引文 斯高帕斯(Scopus)


We present an antibody-free approach for the high-purity and high-throughput dielectrophoretic (DEP) isolation of circulating tumour cells (CTCs) from blood in a microfluidic chip. A hydrodynamic sheath flow is designed upstream in the chip to direct the suspension samples to the channel side walls, thus providing a queue to allow DEP-induced lateral displacements. High-throughput continuous cancer cell sorting (maximum flow rate: ~2.4 mL h-1, linear velocity: ~4 mm s-1) is achieved with a sustained 3D lateral DEP (LDEP) particle force normal to the continuous through-flow. This design allows the continuous fractionation of micro/nanosized particles into different downstream subchannels based on the differences in their different critical negative DEP strengths/mobilities. The main advantage of this separation strategy is that increasing the channel length can effectively increase the throughput proportionally. The effective separation of rare cancer cells (<0.001%) from diluted human blood in a handheld chip is demonstrated. An enrichment factor of 105 and a recovery rate of ~85% from a 0.001% cancer cell sample are achieved at an optimal flow rate of 20 μL min-1 passing through a 6 cm long LDEP channel with an appropriate voltage at a frequency of 10 kHz. A higher throughput of 2.4 mL h-1 is also achieved with a 13 cm long metal-based microchannel.

頁(從 - 到)2950-2959
期刊Lab on a Chip
出版狀態Published - 2015 7月 21

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 生物化學
  • 一般化學
  • 生物醫學工程


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