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A 'super sensor' for cancer and CSIs
Date:8/3/2009

Like the sensitive seismographs that can pick up tremors of impending earthquakes long before they strike, a similar invention from Tel Aviv University researchers may change the face of molecular biology.

Coupling biological materials with an electrode-based device, Prof. Judith Rishpon of TAU's Department of Molecular Microbiology and Biotechnology is able to quickly and precisely detect pathogens and pollution in the environment - and infinitesimally small amounts of disease biomarkers in our blood. About the size of a stick of gum, the new invention may be applied to a wide range of environments and situations. The aim is for the device to be disposable and cost about $1.

"Biosensors are important for the bio-terror industry, but are also critical for detecting pathogens in water, for the food industry, and in medical diagnostics," says Prof. Rishpon. Her latest research appeared in the journals Nanomedicine: Nanotechnology Biology and Medicine, Electroanalysis and Bioelectrochemistry.

Portable and precise

What makes this particular invention particularly appealing is its small size and the fact that it can be easily connected to a handheld device like a Blackberry or iPhone for quick and reliable results. An electrical signal will pulse "yes" for the presence of a test molecule and a "no" for its absence.

Currently, clinical researchers are testing its application in cancer diagnostics, focusing on the detection of proteins associated with colon and brain cancer and efficacy of anticancer drugs. But the device is capable of detecting various types of substances. "It really depends on what you put at the end of the electrode," says Prof. Rishpon.

"You can put enzymes, antibodies or bacteria on my electrodes to sense the existence of a chemical target. Then we can measure the amount of the target, assessing its potency by using additional enzymes or by looking at the changes of
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Contact: George Hunka
ghunka@aftau.org
212-742-9070
American Friends of Tel Aviv University
Source:Eurekalert  

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