Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Pancreatic cancer fights off immune attack

30.08.2007
Scientists of the German Cancer Research Center (Deutsches Krebsforschungszentrum) and the Heidelberg University Hospitals have discovered that pancreatic cancer attracts regulatory T cells, which suppress the activity of immune cells. In this way, the tumor might escape its destruction by the immune system.

The ability to discriminate between friend and foe or between “self“ and “foreign” is vital for a functioning immune system. There are numerous protective mechanisms at work to save the body’s own tissue from attacks by misguided immune cells. A pivotal role is played by regulatory T cells (Treg cells), which prevent immune reactions against the body’s own structures by suppressing the aggressiveness of particular immune cells called T helper cells.

Malignant tumors actively attract Treg cells and, thus, slow down immune defense to protect themselves against elimination. This is suggested by results just published by Associate Professor Dr. Philipp Beckhove jointly with colleagues from the German Cancer Research Center in collaboration with Professor Jürgen Weitz, Dr. Hubertus Schmitz-Winnenthal and other colleagues from the Heidelberg University Hospitals.

In tissue samples of pancreatic cancer the researchers found a much higher number of Treg cells than in samples obtained from regions of the organ that were not affected by cancer. For other immune cells, such as T helper cells, they found no such differences.

Cells of the immune system, including regulatory T cells, are called to their site of action by specific “address molecules“ on the surface of blood vessel cells (endothelial cells). The presence of address molecules is the signal for immune cells patrolling in the bloodstream to squeeze through the vessel wall in order to enter the adjacent tissue. Beckhove and colleagues have shown that Treg cells easily pass through a layer of endothelial cells isolated from tumor tissue. If, however, the endothelial cells originate from healthy tissue, then a significantly lower number of Treg cells make their way through the layer of cells. The researchers also discovered why this is so: Endothelial cells from tumor tissue carry significantly more address molecules on their surface than vessel cells from healthy regions of the pancreas. When the investigators made these adresses invisible using specific antibodies, the Treg accumulation in the tumor tissue was stopped.

“Treatment possibilities for pancreatic carcinoma, in particular, are still insufficient. Specific antibodies preventing the accumulation of Treg cells in the tumor and, thus, strengthening immune defense, might be a useful therapeutic option,” says Phillip Beckhove to explain the relevance of these results.

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.).

Press Officer | alfa
Further information:
http://www.dkfz.de

More articles from Health and Medicine:

nachricht Plasmonic biosensors enable development of new easy-to-use health tests
14.12.2017 | Aalto University

nachricht ASU scientists develop new, rapid pipeline for antimicrobials
14.12.2017 | Arizona State University

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: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

Im Focus: Successful Mechanical Testing of Nanowires

With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong

Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Plasmonic biosensors enable development of new easy-to-use health tests

14.12.2017 | Health and Medicine

New type of smart windows use liquid to switch from clear to reflective

14.12.2017 | Physics and Astronomy

BigH1 -- The key histone for male fertility

14.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>