A microfluidic platform for trapping, releasing and super-resolution imaging of single cells

SENSORS AND ACTUATORS B-CHEMICAL

卷:232

Article

Zhou, Ying¹  Basu, Srinjan²  Wohlfahrt, Kai J.²  Lee, Steven F.³  Klenerman, David³  Laue, Ernest D.²  Seshia, Ashwin A.¹ 

[1] Univ Cambridge, Nanosci Ctr, Dept Engn, 11 JJ Thomson Ave, Cambridge CB3 0FF, England

[2] Univ Cambridge, Dept Biochem, 80 Tennis Court Rd, Cambridge CB2 1GA, England

[3] Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England

关键词: Hydrodynamic trapping;    Particle manipulation;    Single cell analysis;    Super-resolution imaging;    Embryonic stem cells;   

DOI  :  10.1016/j.snb.2016.03.131

来源: Elsevier

【 摘 要 】

A multi-layer device, combining hydrodynamic trapping with microfluidic valving techniques, has been developed for on-chip manipulation and imaging of single cells and particles. Such a device contains a flow layer with trapping channels to capture single particles or cells and a control layer with valve channels to selectively control the trap and release processes. Particles and cells have been successfully trapped and released using the proposed device. The device enables the trapping of single particles with a trapping efficiency of greater than 95%, and allows for single particles and cells to be trapped, released and manipulated by simply controlling corresponding valves. Moreover, the trap and release processes are found to be compatible with biological samples like cells. Our device allows stable immobilisation of large numbers of single cells in a few minutes, significantly easing the experiment setup for single-cell characterisation and offering a stable platform for both single-molecule and super-resolution imaging. Proof-of-concept super-resolution imaging experiments with mouse embryonic stem cells (mESCs) have been conducted by exploiting super-resolution photoactivated localisation microscopy (PALM). Cells and nuclei were stably trapped and imaged. Centromeres of similar to 200 nm size could be identified with a localisation precision of <15 nm. (C) 2016 The Authors. Published by Elsevier B.V.

【 授权许可】

Free