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In this paper, the microfluidic size-separation technique pinched flow fractionation (PFF) is used to separate cancer cells from white blood cells (WBCs). The cells are separated at efficiencies above 90% for both cell types. Circulating tumor cells (CTCs) are found in the blood of cancer patients and can form new tumors. CTCs are rare cells in blood, but they are important for the understanding of metastasis. There is therefore a high interest in developing a method for the enrichment of CTCs from blood samples, which also enables further analysis of the separated cells. The separation is challenged by the size overlap between cancer cells and the 10(6) times more abundant WBCs. The size overlap prevents high efficiency separation, however we demonstrate that cell deformability can be exploited in PFF devices to gain higher efficiencies than expected from the size distribution of the cells.

Original publication

DOI

10.1039/c5lc01014d

Type

Journal article

Journal

Lab chip

Publication Date

21/12/2015

Volume

15

Pages

4598 - 4606

Keywords

Biomechanical Phenomena, Cell Line, Tumor, Cell Separation, Cell Size, Equipment Design, Humans, Leukocytes, Microfluidic Analytical Techniques, Neoplastic Cells, Circulating