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Microchip-like technology allows single-cell analysis
Date:5/14/2014

DURHAM, N.C. -- A U.S. and Korean research team has developed a chip-like device that could be scaled up to sort and store hundreds of thousands of individual living cells in a matter of minutes. The system is similar to a random access memory chip, but it moves cells rather than electrons.

Researchers at Duke University and Daegu Gyeongbuk Institute of Science and Technology (DGIST) in the Republic of Korea hope the cell-sorting system will revolutionize research by allowing the fast, efficient control and separation of individual cells that could then be studied in vast numbers.

"Most experiments grind up a bunch of cells and analyze genetic activity by averaging the population of an entire tissue rather than looking at the differences between single cells within that population," said Benjamin Yellen, an associate professor of mechanical engineering and materials science at Duke's Pratt School of Engineering. "That's like taking the eye color of everyone in a room and finding that the average color is grey, when not a single person in the room has grey eyes. You need to be able to study individual cells to understand and appreciate small but significant differences in a similar population."

The study appears online May 14 in Nature Communications.

Yellen and his collaborator, Cheol Gi Kim of DGIST, printed thin electromagnetic components like those found on microchips onto a slide. These patterns create magnetic tracks and elements like switches, transistors and diodes that guide magnetic beads and single cells tagged with magnetic nanoparticles through a thin liquid film.

Like a series of small conveyer belts, localized rotating magnetic fields move the beads and cells along specific directions etched into a track, while built-in switches direct traffic to storage sites on the chip. The result is an integrated circuit that controls small magnetic objects much like the way electrons are controlled on
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Contact: Ken Kingery
ken.kingery@duke.edu
919-660-8414
Duke University
Source:Eurekalert  

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