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

It is very difficult to predict whether a cancer drug will help an individual patient: only around one third of drugs will work directly in a given patient. Researchers at the Heinz Nixdorf Chair for Medical Electronics at the Technische Universitaet Muenchen (TUM) have developed a new test process for cancer drugs. With the help of microchips, they can establish in the laboratory whether a patient's tumor cells will react to a given drug. This chip could help in future with the rapid identification of the most effective medication for the individual patient.

Cancer is the second most common cause of death in the Western world. According to the German Cancer Research Center in Heidelberg, approximately 450,000 people develop cancer every year in Germany. Although the doctors who treat cancer have numerous cancer drugs at their disposal today, the treatment must be precisely tailored to the patient and the type of cancer in question to be as effective as possible. If it takes a second or third try to find a drug that works, the patient loses valuable time in which the tumor can continue to grow.

In the future, miniature laboratories could provide the fast help required here. A lab-on-a-chip is a device -- made of glass, for example -- that is just a few millimeters across and has bioelectronic sensors that monitor the vitality of living cells. The chips sit in small wells, known as microtiter plates, and are covered with a patient's tumor cells. A robot changes the culture fluid in each well containing a chip at intervals of just a few minutes. The microsensors on the chip record, among other things, changes in the acid content of the medium and the cells' oxygen consumption; photographs of the process are also taken by a microscope fitted underneath the microtiter plate. All of the data merge in a computer that is connected to the system, and which provides an overview of the metabolic activity of the tumor cells and their vitality.

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 system could be used in the treatment of inoperable tumors, for example pancreatic tumors.

In the past, microchips have also been developed at the TUM's Heinz Nixdorf Chair for use in other research fields. For example, one such system is used in the analysis of the water quality of streams and rivers. In this case, a small pump removes samples at regular intervals from the water body and channels it via a pipe to a sensor chip on which algae have been planted. As algae are highly sensitive to toxic substances, they are particularly suitable for water analysis and react to the minutest impurities: their metabolic activity, which is measured on the basis of their oxygen production, declines in less than one minute in the presence of toxins. The data recorded by this sensor system are transmitted via mobile telephone to a computer that raises the alarm. The TUM research team won the E.ON Environmental Award, presented by the Bavarian energy company of the same name, for this system in 2008.


'/>"/>

Contact: Markus Bernards
presse@zv.tum.de
49-892-892-2562
Technische Universitaet Muenchen
Source:Eurekalert  

Related biology news :

1. Panasonic Offers U.are.U(R) Fingerprint Sensor From DigitalPersona on Stingray JS-950 Point-of-Sale Workstations
2. NCR Embeds DigitalPersona U.are.U(R) 4500HD Fingerprint Sensor in New NCR RealPOS(TM) 70XRT Point-of-Sale Workstations
3. HAMILTON Unveils ARC Sensor Technology
4. Think zinc: Molecular sensor could reveal zincs role in diseases
5. SRNL, automakers to develop high-performance wireless sensors networks
6. PRS And EmSense Partner To Integrate Bio-Sensory Measures In Packaging Research Studies
7. New way to make sensors that detect toxic chemicals
8. Fate in fly sensory organ precursor cells could explain human immune disorder
9. Toward cheap underwater sensor nets
10. Uncooperative voltage sensors
11. Sensoring the World Wide Web
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Sensor biochips could aid in cancer diagnosis and treatment
(Date:4/19/2016)... UAE, April 20, 2016 The ... as a compact web-based "all-in-one" system solution for all ... fingerprint reader or the door interface with integration authorization ... access control systems. The minimal dimensions of the access ... into the building installations offer considerable freedom of design ...
(Date:3/31/2016)... , March 31, 2016   ... ("LegacyXChange" or the "Company") LegacyXChange is excited ... of its soon to be launched online site for ... https://www.youtube.com/channel/UCyTLBzmZogV1y2D6bDkBX5g ) will also provide potential shareholders a ... DNA technology to an industry that is notorious for ...
(Date:3/22/2016)... PROVO and SANDY, ... Screening Ontario (NSO), which operates the highest sample volume ... testing, and Tute Genomics and UNIConnect, leaders in clinical ... today announced the launch of a project to establish ... testing panel. NSO has been contracted ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016   EpiBiome , a precision ... million in debt financing from Silicon Valley Bank (SVB). ... and to advance its drug development efforts, as well ... "SVB has been an incredible strategic partner ... a traditional bank would provide," said Dr. Aeron ...
(Date:6/23/2016)... ... , ... STACS DNA Inc., the sample tracking software company, today announced that ... joined STACS DNA as a Field Application Specialist. , “I am thrilled that ... of STACS DNA. “In further expanding our capacity as a scientific integrator, Hays brings ...
(Date:6/23/2016)... , June 23, 2016 Apellis Pharmaceuticals, ... 1 clinical trials of its complement C3 inhibitor, ... and multiple ascending dose studies designed to assess ... of subcutaneous injection in healthy adult volunteers. ... either as a single dose (ranging from 45 ...
(Date:6/23/2016)... LONDON , June 23, 2016 ... & Hematology Review, 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 ... Review , the peer-reviewed journal from touchONCOLOGY, ... the escalating cost of cancer care is placing ... a result of expensive biologic therapies. With the ...
Breaking Biology Technology: