Navigation Links
Stress hormone may hasten the progression of certain blood cancers
Date:11/19/2007

COLUMBUS, Ohio Researchers here have shown that in cell cultures, the stress hormone norepinephrine appears to promote the biochemical signals that stimulate certain tumor cells to grow and spread.

The finding, if verified, may suggest a way of slowing the progression and spread of some cancers enough so that conventional chemotherapeutic treatments would have a better chance to work.

The study also showed that stress hormones may play a completely different role in cancer development than researchers had once thought.

The results appear in the current issue of the journal Brain, Behavior and Immunity.

We would not be surprised if we see similar effects of norepinephrine on tumor progression in several different forms of cancer, explained Eric Yang, first author of the paper and a research scientist with the Institute for Behavioral Medicine Research (IBMR) at Ohio State University.

Yang and colleague Ron Glaser, a professor of molecular virology, immunology and medical genetics, last year showed that the stress hormone norepinephrine was able to increase the production of proteins in cultures of nasopharyngeal carcinoma tumor cells that can foster the aggressive spread of the disease, a process known as metastasis. Glaser is director of the IBMR and a member of the Comprehensive Cancer Center at Ohio State.

In this latest study, the researchers looked at a different type of cancer multiple myeloma. One of several types of cancers of the blood, multiple myeloma strikes nearly 20,000 Americans each year, killing at least half that many annually. Patients diagnosed with this disease normally survive only three to four years with conventional treatments.

Yang and Glaser focused on three multiple myeloma tumor cell lines, each representing a different stage in the life of the disease, for their experiments. While all three tumor cell lines reacted to the presence of norepinephrine, only one, a cell line known as FLAM-76, responded strongly to the hormone.

The norepinephrine binds to receptors on the surface of the cells, sending a signal to the nucleus to produce a compound known as VEGF -- vascular endothelial growth factor that is key to the formation of new blood vessels, which the tumor must have to grow.

The FLAM-76 cell line was prepared from multiple myeloma tumor cells taken from a patient whose disease had not yet progressed too far from its original site in the bone marrow where blood cells are formed.

It turns out that FLAM-76 tumor cells more closely represent the earlier stages of the disease when blood vessel formation, a process called angiogenesis, is needed for disease progression, Yang said.

The fact that this one cell line, of the three multiple myeloma cell lines studied, closely represents the early stages of the tumor, and that this is where we see the biggest effect, is what makes this work more clinically relevant, Glaser said.

The researchers believe that blocking these receptors would slow the process of the growth of more blood vessel to the tumor, delaying disease progression and perhaps allowing treatments to be more effective. Widely used beta-blocker drugs now prescribed for high blood pressure work by blocking these same particular cell surface receptors, Yang said.

This approach wouldn't kill the tumor cells but it would diminish the blood supply to the tumor cells and slow them down, and that could translate into a longer and better quality of life for the patient, Glaser said.

The researchers and their colleagues are now working with other forms of cancer to test the effects of stress hormones like norepinephrine on their growth.

Glaser added that these kinds of results may change the way scientists are looking at a link between stress and the development and spread of cancer. In the past, he said, the focus was on how stress hormones weakened the immune system, allowing certain tumors to evade the body's defenses.

Now we have these stress hormones, not only affecting the immune response, but also acting directly on the tumor cells and inducing changes in the molecules made by those same tumor cells, Glaser said.

This has important implications for the spread of the tumor and metastasis.


'/>"/>

Contact: Eric Yang
yang.3@osu.edu
614-292-0364
Ohio State University
Source:Eurekalert

Related medicine news :

1. New research shows how chronic stress worsens neurodegenerative disease course
2. Ability to cope with stress can increase good cholesterol in older white men, study finds
3. Handling Stress Properly Increases Good Cholesterol
4. New Alzheimers findings: High stress and genetic risk factor lead to increased memory decline
5. Stressed-Out Moms Carry Babies on the Right
6. New Asthma Guidelines Stress Disease Control
7. Latest DES Analysis Stresses Importance of Physicians Well-Trained in Implantation Technique and Patient Follow-Up
8. Study identifies key player in the bodys immune response to chronic stress
9. Environmental stress probed in cardiovascular disease, diabetes
10. Parents PTSD May Boost Stress in Offspring
11. New nurses report job stress, need for better management
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2017)... ... June 23, 2017 , ... Yesterday, U.S. ... healthcare bill to repeal and replace the Affordable Care Act (ACA). Like the ... significant cuts to Medicaid, a public health insurance program for low-income children, pregnant ...
(Date:6/23/2017)... ... June 23, 2017 , ... Everybody has their own ... others prefer to read it, and some people don't like it at all. FindaTopDoc ... what they found: , Erotic literature can give readers a taste of their deepest, ...
(Date:6/23/2017)... ... ... 21 Middle East and South Asia Leaders Selected as Eisenhower Fellows ... civil society in 11 countries across the Middle East and South Asia to embark ... of knowledge and ideas with the leading minds in their fields. , For ...
(Date:6/23/2017)... ... 23, 2017 , ... Ulster University, Magee Campus in Northern Ireland is hosting ... pm to present to graduate students exciting new and innovative hope research based on ... by The Health Improvement Service of the Western Health & Social Care Trust (WHSCT) ...
(Date:6/23/2017)... ... June 23, 2017 , ... Moore ... Houston area with access to asset protection and financial planning services, is teaming ... at improving the lives of children with cancer and other chronic diseases. , ...
Breaking Medicine News(10 mins):
(Date:6/14/2017)... 2017  ivWatch LLC, a medical device company focused ... therapy, is pleased to announce it was the Bronze ... Supplies and Equipment at the 2017 Medical Design Excellence ... industry. The award was presented by Medical Device and ... in New York during MD&M ...
(Date:6/13/2017)... -- Zimmer Biomet Holdings, Inc. (NYSE and SIX: ZBH), a ... Food and Drug Administration (FDA) has notified the Company that ... Zhejiang, China manufacturing facility has been ... clearance of the Warning Letter related to our ... of the progress we have made in our ongoing quality ...
(Date:6/10/2017)... , June 9, 2017  Shane K. Burchfield, DPM, is recognized ... excellence as a Podiatrist in Alabama . ... Family First Foot Care. He brings over 20 years of experience, ... management and healthcare, to his role. ... Care, PC is pleased to welcome you to his ...
Breaking Medicine Technology: