Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New finding in cell migration may be key to preventing clots, cancer spread

15.01.2010
Researchers at the University of Illinois at Chicago College of Medicine have discovered how cells in the body flatten out as they adhere to internal bodily surfaces, the first step in a wide range of important processes including clot formation, immune defense, wound healing, and the spread of cancer cells.

Their study is published in the January 15 issue of Science.

Xiaoping Du, UIC professor of pharmacology, and his colleagues were trying to better understand how platelets in the blood form clots. Clots that form in blood vessels can lead to heart attack and stroke.

To form clots, platelets flatten out to seal the wound and to bind to each other, a process called "spreading." Spreading is the first step in a number of cell processes, Du says.

In order for cells to move, they must adhere and spread onto the extracellular matrix, a scaffolding of fibers that supports cells. Only then is the cell able to crawl along -- whether it be an immune cell moving toward a wound, or a cancer cell invading neighboring tissue.

Adhesion to the extracellular matrix is mediated by cell receptors called integrins. Du's team "found the mechanism for the transmission of the signal to spread" by the integrins, he said.

The integrin molecule spans the cell membrane, with a portion of the integrin inside the cell and another part outside.

When the outside part of the integrin molecule binds to the matrix, a signal is sent inside the cell via a G protein, a type of protein involved in cell signaling but that was not previously known to interact with integrins.

Du and his colleagues found that the G protein G-alpha-13 binds to the inner side of the integrin molecule when the outside portion binds to the matrix. G-alpha-13 then inhibits a molecule called RhoA, which normally allows the cell to maintain a spherical shape. When RhoA is inhibited by G-alpha-13, the cell is able to flatten out and spread onto the matrix.

Because the factors involved in this first step in spreading are common to virtually all cells, Du believes that the mechanism is likely universal.

"Understanding these fundamental processes has the potential to allow us to develop drugs to treat thrombosis, stroke and heart attack," he said, and may lead to drugs that could stop cancer cells from migrating.

The study was supported by grants from the National Heart Lung and Blood Institute, one of the National Institutes of Health. Haixia Gong, Bo Shen, Panagiotis Flevaris, Christina Chow, Stephen Lam, Tatyana Voyno-Yasenetskaya, and Tohru Kozasa, all of the department of pharmacology in the UIC College of Medicine, contributed to the study.

Jeanne Galatzer-Levy | EurekAlert!
Further information:
http://www.uic.edu

More articles from Life Sciences:

nachricht The birth of a new protein
20.10.2017 | University of Arizona

nachricht Building New Moss Factories
20.10.2017 | Albert-Ludwigs-Universität Freiburg im Breisgau

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>