Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A Boost for Radiation Therapy

03.11.2005


Does a combination of radiation therapy and the inhibition of integrins (key molecules in angiogenesis) improve the chance of cure in cancer?



An increasing number of cancer patients are cured today by radiation therapy – alone or in combination with surgery or chemotherapy. At the German Cancer Research Center (Deutsches Krebsforschungszentrum, DKFZ), scientists of the Clinical Cooperation Unit “Radiation Oncology” headed by Professor Dr. Dr. Peter Huber are identifying ways to further enhance the effectiveness of this type of treatment. The research team is targeting a weak point of the tumor: the formation of new blood vessels, or angiogenesis.

Once a tumor has reached pinhead size, it needs a supply of blood by blood vessels. If this supply is cut off, tumor growth comes to a halt. To suppress the formation of new blood vessels, integrins are a suitable target. This protein family comprises about 20 members that are involved in cell-cell interaction and regulate contacts with the surrounding protein matrix. Integrins play a key role in the formation of new blood vessels.


The Heidelberg researchers have now tested a combination of radiotherapy and a drug named S247, a substance which specifically inhibits the function of integrins. Investigations in the culture dish have shown that the combination therapy is considerably more effective both against tumor cells and against blood vessel-forming endothelial cells than irradiation alone. The combination approach has also been tested in mice with transplanted human tumors (glioblastoma, skin and prostate cancer). In these experiments, the combined treatment slowed down tumor growth – with no noticeable toxicity – more than twice as much as either of the therapies alone. In addition, tumors in animals treated by the combination approach formed significantly less blood vessels.

The Heidelberg researchers were able to show that the synergistic effect of the combination treatment can be ascribed to the fact that integrin inhibition neutralizes the angiogenesis-promoting effect of radiation. As a survival strategy, endothelial cells respond to radiation by increasing their integrin production. This promotes their invasion of the tumor tissue. The S247 substance counteracts this effect, while at the same time promoting programmed cell of endothelial cells.

The researchers are now working to define the optimum time period between administration of the drug and irradiation. In a next step, they will carry out clinical studies to investigate whether integrin inhibitors also enhance the chances of cure in patients treated for cancer.

The task of the Deutsches Krebsforschungszentrum in Heidelberg (German Cancer Research Center, DKFZ) is to systematically investigate the mechanisms of cancer development and to identify cancer risk factors. The results of this basic research are expected to lead to new approaches in the prevention, diagnosis and treatment of cancer. The Center is financed to 90 percent by the Federal Ministry of Education and Research and to 10 percent by the State of Baden-Wuerttemberg. It is a member of the Helmholtz Association of National Research Centers (Helmholtz-Gemeinschaft Deutscher Forschungszentren e.V.).

Julia Rautenstrauch | alfa
Further information:
http://www.dkfz.de/de/strahlentherapie/index.html

More articles from Health and Medicine:

nachricht Hot cars can hit deadly temperatures in as little as one hour
24.05.2018 | Arizona State University

nachricht 3D images of cancer cells in the body: Medical physicists from Halle present new method
16.05.2018 | Martin-Luther-Universität Halle-Wittenberg

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>