Featured Research

from universities, journals, and other organizations

Eliminating the ‘good cholesterol’ receptor may fight breast cancer

Date:
April 3, 2012
Source:
Thomas Jefferson University
Summary:
A new study suggests SR-BI plays a role in breast cancer tumor growth.

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.


Story Source:

The above story is based on materials provided by Thomas Jefferson University. Note: Materials may be edited for content and length.


Cite This Page:

Thomas Jefferson University. "Eliminating the ‘good cholesterol’ receptor may fight breast cancer." ScienceDaily. ScienceDaily, 3 April 2012. <www.sciencedaily.com/releases/2012/04/120403153535.htm>.
Thomas Jefferson University. (2012, April 3). Eliminating the ‘good cholesterol’ receptor may fight breast cancer. ScienceDaily. Retrieved September 3, 2014 from www.sciencedaily.com/releases/2012/04/120403153535.htm
Thomas Jefferson University. "Eliminating the ‘good cholesterol’ receptor may fight breast cancer." ScienceDaily. www.sciencedaily.com/releases/2012/04/120403153535.htm (accessed September 3, 2014).

Share This



More Health & Medicine News

Wednesday, September 3, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Snack Attack: Study Says Action Movies Make You Snack More

Snack Attack: Study Says Action Movies Make You Snack More

Newsy (Sep. 2, 2014) You're more likely to gain weight while watching action flicks than you are watching other types of programming, says a new study published in JAMA. Video provided by Newsy
Powered by NewsLook.com
U.N. Says Ebola Travel Restrictions Will Cause Food Shortage

U.N. Says Ebola Travel Restrictions Will Cause Food Shortage

Newsy (Sep. 2, 2014) The U.N. says the problem is two-fold — quarantine zones and travel restrictions are limiting the movement of both people and food. Video provided by Newsy
Powered by NewsLook.com
Doctors Fear They're Losing Battle Against Ebola

Doctors Fear They're Losing Battle Against Ebola

AP (Sep. 2, 2014) As a third American missionary is confirmed to have contracted Ebola in Liberia, doctors on the ground in West Africa fear they're losing the battle against the outbreak. (Sept. 2) Video provided by AP
Powered by NewsLook.com
Tech Giants Bet on 3D Headsets for Gaming, Healthcare

Tech Giants Bet on 3D Headsets for Gaming, Healthcare

AFP (Sep. 2, 2014) When Facebook acquired the virtual reality hardware developer Oculus VR in March for $2 billion, CEO Mark Zuckerberg hailed the firm's technology as "a new communication platform." Duration: 02:24 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins