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Caltech engineers build firast-ever multi-input 'plug-and-play' synthetic RNA device
Date:10/17/2008

PASADENA, Calif.--Engineers from the California Institute of Technology (Caltech) have created a "plug-and-play" synthetic RNA device--a sort of eminently customizable biological computer--that is capable of taking in and responding to more than one biological or environmental signal at a time.

In the future, such devices could have a multitude of potential medical applications, including being used as sensors to sniff out tumor cells or determine when to turn modified genes on or off during cancer therapy.

A synthetic RNA device is a biological device that uses engineered modular components made of RNA nucleotides to perform a specific function--for instance, to detect and respond to biochemical signals inside a cell or in its immediate environment.

Created by Caltech's Christina Smolke, assistant professor of chemical engineering, and Maung Nyan Win, postdoctoral scholar in chemical engineering, the device is made up of modules comprising the RNA-based biological equivalents of engineering's sensors, actuators, and information transmitters. These individual components can be combined in a variety of different ways to create a device that can both detect and respond to what could conceivably be an almost infinite number of environmental and cellular signals.

This modular device processes these inputs in a manner almost identical to the logic gates used in computing; it can perform AND, NOR, NAND, and OR computations, and can perform signal filtering and signal gain operations. Smolke and Win's creation is the first RNA device that can handle more than one incoming piece of biological information. "There's been a lot of work done in single-input devices," notes Smolke. "But this is the first demonstration that a multi-input RNA device is possible."

Their work was published in the October 17 issue of the journal Science.

The modular--or plug-and-play--nature of the device's design also means that it c
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Contact: Lori Oliwenstein
lorio@caltech.edu
626-395-3631
California Institute of Technology
Source:Eurekalert

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