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Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.

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Microfluidic Buffer Exchange for Interference-free Micro/Nanoparticle Cell Engineering

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Published on: July 10, 2016

Novel platform for minimizing cell loss on separation process: Droplet-based magnetically activated cell separator.

Youngho Kim¹, Su Hong, Sang Ho Lee

¹Department of R&D, Cerno Instruments, Seoul 136-764, Korea.

The Review of Scientific Instruments

|August 4, 2007

Summary

The droplet-based magnetically activated cell separator (DMACS) minimizes cell loss in microchannels. This novel device achieves high purity cell separation with minimal adhesion, outperforming traditional methods.

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Area of Science:

Biotechnology
Microfluidics
Cell Separation Technology

Background:

Cell loss due to adhesion is a significant challenge in microfluidic devices.
Existing cell separation methods can lead to substantial cell loss and potential damage.

Purpose of the Study:

To develop and evaluate a droplet-based magnetically activated cell separator (DMACS) to reduce cell loss.
To compare the efficiency and cell viability of DMACS against conventional magnetic-activated cell sorting (MACS).

Main Methods:

Utilized a DMACS platform comprising permanent magnets, a circular coverslip, and an injection tube.
Separated magnetically labeled (CD45) cells using DMACS and MACS.
Quantified cell loss and separation efficiency via flow cytometry and fluorescent imaging.
Assessed cell viability using Hoechst 33342 staining.

Main Results:

DMACS significantly reduced cell loss (3241/59,940) compared to MACS (22,360/59,940).
DMACS achieved high separation efficiency (96.07%), comparable to MACS (96.72%).
No significant cell damage was observed at the gas-liquid interface during DMACS operation.

Conclusions:

DMACS is a highly effective tool for separating rare cells with minimal loss.
The DMACS technology offers a promising solution for cell separation in lab-on-a-chip systems.
DMACS enhances cell recovery and purity, addressing limitations of current microfluidic cell separation techniques.