Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

UW-Madison researchers link protein with breast cancer's spread to the brain

07.01.2014
A cancer-research team at the University of Wisconsin-Madison has identified a protein that may be a major culprit when breast cancer metastasizes to the brain.

Brain metastasis is a terrifying complication of advanced breast cancer, with a grim prognosis and few treatment options. The cancer's spread to the brain is often undetected until patients start to develop symptoms such as seizures, headaches, and trouble thinking. Scientists hope a better understanding of the molecular events that regulate brain metastasis will lead to earlier diagnosis and improved therapies.

Using cell models, the researchers found that breast cancer cells harness a protein called alphaB-crystallin to help them stick to endothelial cells that line the small blood vessels in the brain. In addition, this protein enhances the penetration of breast cancer cells through the blood-brain barrier, which normally prevents cells and many molecules from entering the brain. Once in the brain, the breast cancer cells are able to form metastases.

The study, published in Clinical Cancer Research, and featured on the journal cover, was led by Dr. Vincent Cryns, professor of medicine at the University of Wisconsin School of Medicine and Public Health and a member of the University of Wisconsin Carbone Cancer Center.

Cryns and his colleagues also developed new mouse models of breast-cancer brain metastasis that mimic many features of the human disease. They found that reducing the expression of alphaB-crystallin in breast cancer cells hindered the cells' ability to form brain metastases in mice.

"These observations in our mouse models suggest that alphaB-crystallin may be a promising drug target that should be explored further," said Cryns. "Although there are no drug inhibitors of this protein currently, we are actively pursuing studies to identify drugs that might reduce the expression of the protein or block its effects," he added.

In addition, by examining tissue from breast-cancer patients who developed brain metastasis, the investigators discovered that women with breast tumors that expressed alphaB-crystallin had a shorter survival than women with breast tumors that did not express this protein. These studies were conducted in collaboration with researchers at the University of North Carolina at Chapel Hill, Duke University and other institutions.

Furthermore, the team found breast tumors that expressed alphaB-crystallin were more likely to be triple-negative breast cancers—an aggressive type of cancer, which lacks three receptors (estrogen receptor, progesterone receptor and HER-2) expressed in other types of breast cancer. Triple-negative breast cancers are known to have a high incidence of brain metastasis.

"Our findings suggest that alphaB-crystallin may contribute to the tendency of triple-negative breast cancers to metastasize to the brain and to their poor prognosis," said Cryns. Yet, he cautioned these findings need to be validated in additional studies.

The research was supported by grants from the Breast Cancer Research Foundation, the National Institutes of Health, Susan G. Komen, and the Cancer and Leukemia Group B.

Lisa Brunette | EurekAlert!
Further information:
http://www.uwhealth.org

More articles from Health and Medicine:

nachricht Penn vet research identifies new target for taming Ebola
12.01.2017 | University of Pennsylvania

nachricht The strange double life of Dab2
10.01.2017 | University of Miami Miller School of Medicine

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: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>