Featured Research

from universities, journals, and other organizations

Stress fuels breast cancer metastasis to bone

Date:
July 17, 2012
Source:
Vanderbilt University Medical Center
Summary:
Stress can promote breast cancer cell colonization of bone, investigators have discovered. The studies demonstrate in mice that activation of the sympathetic nervous system -- the "fight-or-flight" response to stress – primes the bone environment for breast cancer cell metastasis. The researchers were able to prevent breast cancer cell lesions in bone using propranolol, a cardiovascular medicine that inhibits sympathetic nervous system signals.

Stress can promote breast cancer cell colonization of bone, Vanderbilt Center for Bone Biology investigators have discovered.

The studies, reported July 17 in PLoS Biology, demonstrate in mice that activation of the sympathetic nervous system -- the "fight-or-flight" response to stress -- primes the bone environment for breast cancer cell metastasis. The researchers were able to prevent breast cancer cell lesions in bone using propranolol, a cardiovascular medicine that inhibits sympathetic nervous system signals.

Metastasis -- the spread of cancer cells to distant organs, including bone -- is more likely to kill patients than a primary breast tumor, said Florent Elefteriou, Ph.D., director of the Vanderbilt Center for Bone Biology.

"Preventing metastasis is really the goal we want to achieve," he said.

Elefteriou and his colleagues knew from their previous studies that the sympathetic nervous system stimulated bone remodeling, and that it used some of the same signaling molecules that have been implicated in breast cancer metastasis to bone.

"We came to the hypothesis that sympathetic activation might remodel the bone environment and make it more favorable for cancer cells to metastasize there," Elefteriou said.

Evidence from the clinic supported this notion. Breast cancer patients who suffered from stress or depression following their primary treatment had shorter survival times. Both stress and depression activate the sympathetic nervous system.

To explore this possible link, the researchers studied cancer cell metastasis in mice. They followed fluorescently "tagged" human breast cancer cells that were injected into the mouse heart to model the stage of metastasis when breast cancer cells leave the primary site and move through the circulation.

They found that treating the mice with a drug that mimics sympathetic nervous system activation caused more cancer lesions in bone. Using physical restraint to stress the mice and activate the sympathetic nervous system also caused more cancer lesions in bone. Treating the restrained mice with propranolol, one of a family of blood pressure medicines called "beta-blockers," reduced the number of bone lesions.

The investigators demonstrated that sympathetic nervous system activation increases bone levels of a signaling molecule called RANKL, which is known to promote the formation of osteoclasts -- bone cells that break down bone tissue. RANKL has also been implicated in cell migration, and Elefteriou and colleagues were able to show that breast cancer cell migration to the bone depends on RANKL.

The findings suggest that beta-blockers or drugs that interfere with RANKL signaling, such as denosumab, may be useful in preventing breast cancer cell metastasis to bone. Propranolol and other beta-blockers are inexpensive, well characterized, and safe in most patients. They may be a good choice for long-term treatment if future studies in patients with breast cancer confirm their ability to block cancer cell metastasis to bone, Elefteriou said.

"If something as simple as a beta blocker could prevent cancer metastasis to bone, this would impact the treatment of millions of patients worldwide," he said.

Efforts to reduce stress and depression in patients with cancer may have unappreciated benefits in terms of metastasis prevention, he added.


Story Source:

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


Journal Reference:

  1. J. Preston Campbell, Matthew R. Karolak, Yun Ma, Daniel S. Perrien, S. Kathryn Masood-Campbell, Niki L. Penner, Steve A. Munoz, Andries Zijlstra, Xiangli Yang, Julie A. Sterling, Florent Elefteriou. Stimulation of Host Bone Marrow Stromal Cells by Sympathetic Nerves Promotes Breast Cancer Bone Metastasis in Mice. PLoS Biology, July 17, 2012 DOI: 10.1371/journal.pbio.1001363

Cite This Page:

Vanderbilt University Medical Center. "Stress fuels breast cancer metastasis to bone." ScienceDaily. ScienceDaily, 17 July 2012. <www.sciencedaily.com/releases/2012/07/120717183344.htm>.
Vanderbilt University Medical Center. (2012, July 17). Stress fuels breast cancer metastasis to bone. ScienceDaily. Retrieved April 25, 2014 from www.sciencedaily.com/releases/2012/07/120717183344.htm
Vanderbilt University Medical Center. "Stress fuels breast cancer metastasis to bone." ScienceDaily. www.sciencedaily.com/releases/2012/07/120717183344.htm (accessed April 25, 2014).

Share This



More Health & Medicine News

Friday, April 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Fungus Killing Bats, Spreading in US

Deadly Fungus Killing Bats, Spreading in US

AP (Apr. 24, 2014) A disease that has killed more than six million cave-dwelling bats in the United States is on the move and wildlife biologists are worried. White Nose Syndrome, discovered in New York in 2006, has now spread to 25 states. (April 24) Video provided by AP
Powered by NewsLook.com
Companies Ramp Up Wellness to Lower Health Costs

Companies Ramp Up Wellness to Lower Health Costs

AP (Apr. 24, 2014) That little voice telling you to exercise, get in shape and get healthy is probably coming from your boss. More companies are beefing up wellness programs to try and cut down their health care costs. (April 24) Video provided by AP
Powered by NewsLook.com
Blood From World's Oldest Woman Suggests Life Limit

Blood From World's Oldest Woman Suggests Life Limit

Newsy (Apr. 24, 2014) Scientists say for the extremely elderly, their stem cells might reach a state of exhaustion. This could limit one's life span. Video provided by Newsy
Powered by NewsLook.com
FDA Wants To Ban Sales Of E-Cigarettes To Minors

FDA Wants To Ban Sales Of E-Cigarettes To Minors

Newsy (Apr. 24, 2014) The Food and Drug Administration wants to crack down on the use of e-cigarettes, banning the sale of the product to minors. Video provided by Newsy
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