Enrichment and detection of circulating tumor cells by immunomagnetic beads and flow cytometry

Abstract

Objective

The purpose of the article is to establish a quick enrichment and detection method using immunomagnetic beads and flow cytometry to analyze circulating tumor cells (CTCs) in the peripheral blood.

Results

After incubation with CD326-PE and CD45-APC antibodies, more than 60% MCF7 cells in M-Buffer could be detected while less than 10% of the same cells could be detected by flow cytometry (FCM) if spiked into blood. However, in combination with CD326 and CD45 immunomagnetic beads, detection rate of MCF7 cells in blood reached 57%. For circulating tumor cells, enrichment by CD326 and CD45 immunomagnetic beads improve the detection rate from nearly undetectable to more than 24.14%.

Conclusions

Live CTCs in peripheral blood can be effectively and sensitively detected by using a combination of immunomagnetic beads (CD45 and CD326) and flow cytometry.

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Acknowledgements

This work was supported by the 100-Talent Program of Chinese Academy of Sciences, the National Natural Science Foundation of China (Nos. 81572948, 21772201, 21703254), the co-operative grant from Anhui Medical University and Center of Medical Physics and Technology (No. LHJJ202007).

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Correspondence to Jinfu Nie or Haiming Dai.

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Lei Hu and Xueran Chen have contributed equally to this work.

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Hu, L., Chen, X., Chen, M. et al. Enrichment and detection of circulating tumor cells by immunomagnetic beads and flow cytometry. Biotechnol Lett (2020). https://doi.org/10.1007/s10529-020-03007-8

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Keywords

  • Circulating tumor cells
  • Flow cytometry
  • Fluorescence antibodies
  • Immunomagnetic beads