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A genetic device performs DNA diagnosis
Date:2/7/2013

vely" diagnosed cells to self-destruct.

In the present study, published in Nature's Scientific Reports, the researchers first created a device that functioned like what is known in computing as a NOR logical gate: It was programmed to check for the presence of two transcription factors and respond by emitting a green light only if both were missing. When the scientists inserted the device into four types of genetically engineered bacteria - those making both transcription factors, those making none of the transcription factors, and two types making one of the transcription factors each - only the appropriate bacteria shone green. Next, the research team - which also included graduate students Yehonatan Douek and Lilach Milo - created more complex genetic devices, corresponding to additional logical gates.

Following the success of the study in bacterial cells, the researchers are planning to test ways of recruiting such bacteria as an efficient system to be conveniently inserted into the human body for medical purposes (which shouldn't be a problem; recent research reveals there are already 10 times more bacterial cells in the human body than human cells). Yet another research goal is to operate a similar system inside human cells, which are much more complex than bacteria.


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Contact: Yivsam Azgad
news@weizmann.ac.il
972-893-43856
Weizmann Institute of Science
Source:Eurekalert

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