Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Eliminating the 'good cholesterol' receptor may fight breast cancer

04.04.2012
Study suggests SR-BI plays a role in breast cancer tumor growth, say Jefferson’s Kimmel Cancer Center researchers

Removing a lipoprotein receptor known as SR-BI may help protect against breast cancer, as suggested by new findings presented at the American Association for Cancer Research Annual Meeting 2012 by Jefferson's Kimmel Cancer Center researchers.

In vitro and mouse studies revealed that depletion of the SR-BI resulted in a decrease in breast cancer cell growth.

SR-BI is a receptor for high-density lipoproteins (HDL) that are commonly referred to as "good cholesterol" because they help transport cholesterol out of the arteries and back to the liver for excretion.

The team, including Christiane Danilo, of the Department Stem Cell Biology and Regenerative Medicine at Thomas Jefferson University, and Philippe G. Frank, Ph.D., an assistant professor in the Department of Stem Cell Biology and Regenerative Medicine at Jefferson, had good reason to believe that SR-BI played a role in breast cancer growth: Previous lab research had revealed that mice fed a high cholesterol diet develop more advanced tumors and their tumors produce more SR-BI.

To further investigate SR-BI's role in breast cancer tumors, the team manipulated levels of the receptor in human breast cancer cell lines and examined its effect on tumor formation in a mouse model.

In vitro, they found that ablation of the receptor protein in breast cancer cells led to a decrease in cancer cell proliferation, migration and invasion. Mouse models also showed that depletion of the receptor could confer protection against tumor growth.

Environmental factors, such as diet and obesity, have long been considered risk factors for the high breast cancer incidence in the Western world, and epidemiologic evidence indicates that cancer patients display abnormal levels of cholesterol carrying lipoproteins. However, the role of cholesterol in breast cancer had not yet been specifically examined.

"The results of this novel study show that depletion of SR-BI reduces cancer cell and tumor growth, suggesting that it could play an important role in breast cancer," said Dr. Frank. "More studies are warranted to further characterize the role of SR-BI in tumor progression."

Other researchers include Michael P. Lisanti, M.D., Ph.D., Chairman of the Department of Stem Cell Biology and Regenerative Medicine at Jefferson, and Maria Antonietta Mainieri of the University of Calabria, Rende, in Italy.

The study was funded by the Susan G. Komen Foundation.

Steve Graff | EurekAlert!
Further information:
http://www.jefferson.edu

More articles from Life Sciences:

nachricht Meadows beat out shrubs when it comes to storing carbon
23.11.2017 | Norwegian University of Science and Technology

nachricht Migrating Cells: Folds in the cell membrane supply material for necessary blebs
23.11.2017 | Westfälische Wilhelms-Universität Münster

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Frictional Heat Powers Hydrothermal Activity on Enceladus

Computer simulation shows how the icy moon heats water in a porous rock core

Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Underwater acoustic localization of marine mammals and vehicles

23.11.2017 | Information Technology

Enhancing the quantum sensing capabilities of diamond

23.11.2017 | Physics and Astronomy

Meadows beat out shrubs when it comes to storing carbon

23.11.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>