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Sensor biochips could aid in cancer diagnosis and treatment
Date:10/21/2009

The robots and microtiter plates are kept in a chamber which, through precisely regulated temperature and humidity, provides an environment similar to that of the human body, and which also protects the tumor cells against external influences that can falsify the test results.

After the tumor cells have been able to divide undisturbed for a few hours, the robot applies an anti-cancer substance. If their metabolic activity declines over the next day or two, the active substance was able to kill the tumor cells and the drug is effective. Using the microchips, twenty-four active substances or combinations of active substances can be tested simultaneously in this way.

The gain in time for the patient is not the only positive factor here. Dr. Helmut Grothe, a scientist from the Heinz Nixdorf Chair at the TUM, explains: "Treatment with an ineffective cancer drug sometimes leads to the development of resistance to other drugs in the patient." Such resistance on the part of the tumor cells can also be identified at an early stage with the help of the sensor chip.

Another advantage of the system is its automation. The robot works faster and more accurately than any human could. Hence, the test results can be obtained quickly, which, in turn, saves on costs. Furthermore, the possibility of testing tumor cells with several active substances simultaneously facilitates the search for effective substances for individually tailored cancer treatment. Pharmaceutical companies may also be able to use the sensor chip in the development of new drugs in future.

As part of another research project, the scientists at the Heinz Nixdorf Chair are also developing a sensor chip that is intended to control tumor growth. The chip, which would be implanted once in the vicinity of the tumor, could release cancer drugs or pain medication only when the tumor grows. The release of the active substances would be controlled by electrical impulses. This sensor sys
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Contact: Markus Bernards
presse@zv.tum.de
49-892-892-2562
Technische Universitaet Muenchen
Source:Eurekalert  

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