Navigation Links
Emotional stress reduces effectiveness of prostate cancer therapies in animal model
Date:1/25/2013

WINSTON-SALEM, N.C. Jan. 25, 2013 Not surprisingly, a cancer diagnosis creates stress. And patients with prostate cancer show higher levels of anxiety compared to other cancer patients.

A new study by researchers at Wake Forest Baptist Medical Center indicates that stress is not just an emotional side effect of the diagnosis; it also can reduce the effectiveness of prostate cancer drugs and accelerate the development of prostate cancer.

The findings are published in the February issue of the Journal of Clinical Investigation.

The Wake Forest Baptist team, headed by George Kulik, D.V.M., Ph.D., associate professor of cancer biology, tested the effects of behavioral stress in two different mouse models of prostate cancer.

One model used mice that were implanted with human prostate cancer cells and treated with a drug that is currently in clinical trial for prostate cancer treatment. When the mice were kept calm and free of stress, the drug destroyed prostate cancer cells and inhibited tumor growth. However, when the mice were stressed, the cancer cells didn't die and the drug did not inhibit tumor growth.

In the second model, mice genetically modified to develop prostate cancer were used. When these mice were repeatedly stressed, the size of prostate tumors increased. When the mice were treated with bicalutamide, a drug currently used to treat prostate cancer, their prostate tumors decreased in size. However, if mice were subjected to repeated stress, the prostate tumors didn't respond as well to the drug.

After analyzing the data, the Wake Forest Baptist researchers identified the cell signaling pathway by which epinephrine, a hormone also known as adrenaline, sets off the cellular chain reaction that controls cell death. Considering that prostate cancer diagnosis increases stress and anxiety levels, stress-induced activation of the signaling pathway that turns off the cell death process may lead to a vicious cycle of stress and cancer progression, Kulik said.

Yet in both models in which the mice were given beta-blocker, stress did not promote prostate tumor growth. Beta-blocker is a drug that inhibits the activation of anti-death signaling by epinephrine.

"Providing beta-blockers to prostate cancer patients who had increased epinephrine levels could improve the effectiveness of anti-cancer therapies," Kulik said. "Our findings could be used to indentify prostate cancer patients who will benefit from stress reduction or from pharmacological inhibition of stress-inducing signaling."

The researchers now plan to test the same signaling mechanism that was identified in mice to determine if it also works in the same way in human prostates, Kulik said.

"We are at the very beginning of understanding complex stress-cancer interactions with multifaceted responses to stress that affect cancer cells, tumor microenvironment, and the organism overall," he said. "We hope that components of this signaling pathway could be used as biomarkers to predict whether and how a given tumor will respond to stress and anti-stress therapies."


'/>"/>

Contact: Marguerite Beck
marbeck@wakehealth.edu
336-716-2415
Wake Forest Baptist Medical Center
Source:Eurekalert

Related medicine news :

1. Researchers map emotional intelligence in the brain
2. Emotional disconnection disorder threatens marriages, researcher says
3. Meditation appears to produce enduring changes in emotional processing in the brain
4. Pacifiers may have emotional consequences for boys
5. Chronic Pain May Depend on Emotional Reaction to Injury
6. Author and Speaker Dr. Yvonne Corppetts to Lecture on Creating A Healthy Workplace (Emotionally)
7. Emotional Woes May Last for Childhood Cancer Survivors
8. Gatekeeper of brain steroid signals boosts emotional resilience to stress
9. Online Dating Scams Can Take Emotional, Financial Toll
10. SMART heart eases heart ache, targets cardiac patients emotional well-being
11. Emotional Trauma May Hurt Toddlers Later Learning
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... 27, 2016 , ... Quality metrics are proliferating in cancer care, and are ... the eye of the beholder, according to experts who offered insights and commentary in ... Managed Care. For the full issue, click here . , For the American ...
(Date:6/26/2016)... ... June 26, 2016 , ... Brent Kasmer, a legally blind and certified personal trainer ... through a fitness app. The fitness app plans to fix the two major problems leading ... a one size fits all type program , They don’t eliminate all the ...
(Date:6/25/2016)... ... ... The temporary closing of Bruton Memorial Library on June 21 due to a possible lice ... overlooked aspect of head lice: the parasite’s ability to live away from a human host, ... a necessary one in the event that lice have simply gotten out of control. , ...
(Date:6/25/2016)... , ... June 25, 2016 , ... ... and non-athletes recover from injury. Recently, he has implemented orthobiologic procedures as a ... area —Johnson is one of the first doctors to perform the treatment. Orthobiologics ...
(Date:6/24/2016)... ... ... Those who have experienced traumatic events may suffer from a complex set of ... or alcohol abuse, as a coping mechanism. To avoid this pain and suffering, Serenity ... event. , Trauma sufferers tend to feel a range of emotions, from depression, guilt, ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... June 24, 2016 Research and Markets ... for Companion Diagnostic Tests" report to their offering. ... Companion Diagnostics The World Market for Companion ... medicine diagnostics. Market analysis in the report includes the following: ... (In Vitro Diagnostic Kits) by Region (N. America, EU, ROW), ...
(Date:6/24/2016)... Tenn. , June 24, 2016  Arkis ... providing less invasive and more durable cerebrospinal fluid ... in funding.  The Series-A funding is led by ... Lighthouse Fund, and other private investors.  Arkis, new ... neurosurgical instrumentation and the market release of its ...
(Date:6/23/2016)... 2016 Research and Markets has ... by Type (Organic Chemical (Sugar, Petrochemical, Glycerin), Inorganic Chemical), ... Parenteral) - Global Forecast to 2021" report to ... The global pharmaceutical excipients market is projected to reach ... 6.1% in the forecast period 2016 to 2021. ...
Breaking Medicine Technology: