Abstract
Breast cancer cell-derived exosomes have high potential as biomarkers for continuous biopsies and longitudinal monitoring in breast cancer. However, it is extremely difficult to separate exosomes with high recovery and high purity from complex media, such as urine, plasma, saliva and cell culture supernatants. Here, we designed a flexible and simple microfluidic chip for exosome separation. The capture zone of the chip is a three-dimensional structure of interlaced cylinders doped with nickel powder. Exosomes were separated from cell culture supernatant by the immunomagnetic separation method in continuous flow mode and were detected by fluorescence imaging with high sensitivity. The chip achieved a high exosome recovery rate (> 74%) and purity (> 67%) at an injection rate of 3.6 mL/h. Thus, this chip was demonstrated to be a cutting-edge platform for the separation and detection of exosomes. It could also be applied to separate and detect other types of exosomes, microbubbles and cells.
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Funding
This research was supported by the Natural Science Foundation of Chongqing, China (No. cstc2020jcyj-msxmX0367) and the Chongqing Medical Scientific Research Project (Joint Project of Chongqing Health Commission and Science and Technology Bureau, No. 2022MSXM136).
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Huiying Fang and Mei Liu contributed equally to this work. Material preparation, data collection and analysis were performed by Huiying Fang and Mei Liu. The manuscript was written by Wei Jiang.
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Fang, H., Liu, M. & Jiang, W. Nickel-Doped Microfluidic Chip for Rapid and Efficient Immunomagnetic Separation and Detection of Breast Cancer Cell-Derived Exosomes. Appl Biochem Biotechnol 195, 3109–3121 (2023). https://doi.org/10.1007/s12010-022-04272-1
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DOI: https://doi.org/10.1007/s12010-022-04272-1