Elasticity-Modulated Microbeads for Classification of Floating Normal and Cancer Cells Using Confining Microchannels

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Detail(s)

Original languageEnglish
Pages (from-to)3889-3898
Number of pages19
Journal / PublicationACS Biomaterial Science and Engineering
Volume5
Issue number8
Online published29 May 2019
Publication statusPublished - 12 Aug 2019

Abstract

Engineered microbeads have a wide range of applications in cancer research including identification, characterization, and sorting of cancer cells. In particular, the microbead-based cancer identification techniques are mainly based on the known genetic or biochemical biomarkers; and detection specificity is yet to be improved. On the other hand, it has been discovered that biomechanical properties of cancer cells such as cell-body elasticity can be considered as cancer biomarkers. Here, we report a straightforward microfluidic classification scheme for floating/dissociated normal and cancer epithelial cells using a confining microchannel device together with calcium-alginate hydrogel microbeads. The hydrogel microbeads are generated based on the microfluidic emulsion process, with characterization on the process parameters (e.g., liquid driving pressure and cross-linking duration) in order to specify the resultant bead diameter and elasticity. These engineered microbeads are first mixed with a cell mixture of dissociated human nasopharyngeal epithelial cells (NP460) and nasopharyngeal carcinoma cells (NPC43). The cell elasticity can then be reflected from the locations of captured cells in the device. Experiments further demonstrate that the cell classification has a success rate of >95%. Furthermore, we performed the microbead-based cell classification on a whole blood sample containing floating human breast epithelial cells (MCF-10A) and breast cancer epithelial cells (MDA-MB-231) with a success rate of >75%, revealing its directly applicability to identification of circulating tumor cells in human blood. Together, this research demonstrates a new application of engineered hydrogel microbeads for classification of cells based on their mechanical properties.

Research Area(s)

  • microfluidic, microbead, elasticity, cell classification, cancer, CIRCULATING TUMOR-CELLS, MAGNETIC-RESONANCE DETECTION, BREAST-CANCER, OIL EMULSIONS, ENCAPSULATION, DEFORMATION, MIGRATION, BEHAVIOR, FLOW, DNA

Citation Format(s)

Elasticity-Modulated Microbeads for Classification of Floating Normal and Cancer Cells Using Confining Microchannels. / Ren, Jifeng; Li, Jiyu; Li, Yongshu; Xiao, Peng; Liu, Yi; Tsang, Chi Man; Tsao, Sai Wah; Lau, Denvid; Chan, Kannie W. Y.; Lam, Raymond H. W.

In: ACS Biomaterial Science and Engineering, Vol. 5, No. 8, 12.08.2019, p. 3889-3898.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal