Abstract
Circulating tumor cells (CTCs), which are derived from primary tumor site and transported to distant organs, are considered as the major cause of metastasis. So far, various techniques have been applied for CTC isolation and enumeration. However, there exists great demand to improve the sensitivity of CTC capture, and it remains challenging to elute the cells efficiently from device for further biomolecular and cellular analyses. In this study, we fabricate a dual functional chip integrated with herringbone structure and micropost array to achieve CTC capture and elution through EpCAM-based immunoreaction. Hep3B tumor cell line is selected as the model of CTCs for processing using this device. The results demonstrate that the capture limit of Hep3B cells can reach up to 10 cells (per mL of sample volume) with capture efficiency of 80 % on average. Moreover, the elution rate of the captured Hep3B cells can reach up to 69.4 % on average for cell number ranging from 1 to 100. These results demonstrate that this device exhibits dual functions with considerably high capture rate and elution rate, indicating its promising capability for cancer diagnosis and therapeutics.
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Acknowledgments
This work was supported by a Tier 2 Academic Research Fund (ARC 22/13) and a Tier 1 Academic Research Fund (RG 37/14) from the Ministry of Education of Singapore awarded to Y.K. The Ph.D. scholarship from Nanyang Technological University awarded to P.X. is gratefully acknowledged.
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Xue, P., Wu, Y., Guo, J. et al. Highly efficient capture and harvest of circulating tumor cells on a microfluidic chip integrated with herringbone and micropost arrays. Biomed Microdevices 17, 39 (2015). https://doi.org/10.1007/s10544-015-9945-x
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DOI: https://doi.org/10.1007/s10544-015-9945-x