Homoporous polydimethylsiloxane membrane microfilter for ultrafast label-free isolation and recognition of circulating tumor cells in peripheral blood

Peng Xie, Xiaoyue Yao, Zhenyu Chu, Yang Yang, Haifeng Li, Siyuan Tan, Haodong Tang, Jiahua Zhou, Wanqin Jin

Research output: Contribution to journalArticlepeer-review

Abstract

The detection of circulating tumor cells (CTCs) in peripheral blood is a novel and accurate technique for the early diagnosis of cancers. However, this method is challenging because of the need for high collection efficiency due to the ultralow content and similar size of CTCs compared with other blood cells. To address the aforementioned issue, we proposed a homoporous polydimethylsiloxane (PDMS) membrane and its microfilter device to perform the ultrafast isolation and identification of CTCs directly from peripheral blood without any labeling treatment. The membrane pores can be homogenously controlled at a size of 6.3 μm through the cross-linking time of PDMS during a filtration-coating strategy. Within only 10 s, the designed device achieved a retention rate greater than 70% for pancreatic cancer cells, and it exhibited excellent cell compatibility to support cell proliferation. The isolated CTCs on this membrane can be easily observed and identified using a fluorescence microscope.

Original languageEnglish
Article number108246
JournaliScience
Volume26
Issue number11
DOIs
StatePublished - 17 Nov 2023

Keywords

  • Health technology
  • Materials science

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