» Articles » PMID: 38675233

The Shape Effect of Acoustic Micropillar Array Chips in Flexible Label-Free Separation of Cancer Cells

Overview
Publisher MDPI
Date 2024 Apr 27
PMID 38675233
Authors
Affiliations
Soon will be listed here.
Abstract

The precise isolation of circulating tumor cells (CTCs) from blood samples is a potent tool for cancer diagnosis and clinical prognosis. However, CTCs are present in extremely low quantities in the bloodstream, posing a significant challenge to their isolation. In this study, we propose a non-contact acoustic micropillar array (AMPA) chip based on acoustic streaming for the flexible, label-free capture of cancer cells. Three shapes of micropillar array chips (circular, rhombus, and square) were fabricated. The acoustic streaming characteristics generated by the vibration of microstructures of different shapes are studied in depth by combining simulation and experiment. The critical parameters (voltage and flow rate) of the device were systematically investigated using microparticle experiments to optimize capture performance. Subsequently, the capture efficiencies of the three micropillar structures were experimentally evaluated using mouse whole blood samples containing cancer cells. The experimental results revealed that the rhombus microstructure was selected as the optimal shape, demonstrating high capture efficiency (93%) and cell activity (96%). Moreover, the reversibility of the acoustic streaming was harnessed for the flexible release and capture of cancer cells, facilitating optical detection and analysis. This work holds promise for applications in monitoring cancer metastasis, bio-detection, and beyond.

References
1.
Wu M, Ouyang Y, Wang Z, Zhang R, Huang P, Chen C . Isolation of exosomes from whole blood by integrating acoustics and microfluidics. Proc Natl Acad Sci U S A. 2017; 114(40):10584-10589. PMC: 5635903. DOI: 10.1073/pnas.1709210114. View

2.
Feng L, Song B, Zhang D, Jiang Y, Arai F . On-Chip Tunable Cell Rotation Using Acoustically Oscillating Asymmetrical Microstructures. Micromachines (Basel). 2018; 9(11). PMC: 6265899. DOI: 10.3390/mi9110596. View

3.
Jones I, Dent L, Higo T, Roumeliotis T, Arias Garcia M, Shree H . Characterization of proteome-size scaling by integrative omics reveals mechanisms of proliferation control in cancer. Sci Adv. 2023; 9(4):eadd0636. PMC: 9876555. DOI: 10.1126/sciadv.add0636. View

4.
Wang Z, Huang P, Chen C, Bachman H, Zhao S, Yang S . Cell lysis via acoustically oscillating sharp edges. Lab Chip. 2019; 19(24):4021-4032. PMC: 6934418. DOI: 10.1039/c9lc00498j. View

5.
Sung H, Ferlay J, Siegel R, Laversanne M, Soerjomataram I, Jemal A . Global Cancer Statistics 2020: GLOBOCAN Estimates of Incidence and Mortality Worldwide for 36 Cancers in 185 Countries. CA Cancer J Clin. 2021; 71(3):209-249. DOI: 10.3322/caac.21660. View