Featured Research

from universities, journals, and other organizations

Brain atrophy responsible for depression in people battling multiple sclerosis

Date:
July 4, 2010
Source:
University of California - Los Angeles
Summary:
Adding to all that ails people managing their multiple sclerosis (MS) is depression, which has a lifetime risk for MS sufferers as high as 50 percent. Now for the first time in living humans, researchers suggest atrophy of a specific region of the hippocampus, a critical part of the brain involved in mood and memory, among other functions, may be the cause.

MS Atrophy. Brain images showing location of hippocampus and its sub-regions in the brain. Bar graph shows atrophy within these specific hippocampal sub-regions. Black bars represent the control group; white bars represent people with MS who are not depressed; striped bars represent people with MS and depression.
Credit: Image courtesy of University of California - Los Angeles

Adding to all that ails people managing their multiple sclerosis is depression ― for which MS sufferers have a lifetime risk as high as 50 percent.

Related Articles


Yet despite its prevalence, the cause of this depression is not understood. It's not related to how severe one's MS is, and it can occur at any stage of the disease. That suggests it is not simply a psychological reaction that comes from dealing with the burden of a serious neurologic disorder.

Now, in the first such study in living humans, researchers at UCLA suggest a cause, and it's not psychological, but physical: atrophy of a specific region of the hippocampus, a critical part of the brain involved in mood and memory, among other functions.

Reporting in the early online edition of the journal Biological Psychiatry, senior study author Dr. Nancy Sicotte, a UCLA associate professor of neurology, Stefan Gold, lead author and a postdoctoral fellow in the UCLA Multiple Sclerosis Program, and colleagues used high-resolution magnetic resonance imaging to identify three key sub-regions of the hippocampus that were found to be smaller in people with MS when compared with the brains of healthy individuals.

The researchers also found a relationship between this atrophy and hyperactivity of the hypothalamic-pituitary-adrenal (HPA) axis, a complex set of interactions among three glands. The HPA axis is part of the neuroendocrine system that controls reactions to stress and regulates many physiological processes. It's thought that this dysregulation may play a role in the atrophy of the hippocampus and the development of depression.

"Depression is one of the most common symptoms in patients with multiple sclerosis," Gold said. "It impacts cognitive function, quality of life, work performance and treatment compliance. Worst of all, it's also one of the strongest predictors of suicide."

The researchers examined three sub-regions of the hippocampus region ― CA1, CA3 and the dentate gyrus area of the hippocampal region called CA23DG (CA stands for cornu ammonis). They imaged 29 patients with relapsing remitting multiple sclerosis and compared them with 20 healthy control subjects who did not have MS. They also measured participants' cortisol level three times a day; cortisol is a major stress hormone produced by the HPA axis that affects many tissues in the body, including the brain.

In addition to the difference between MS patients and healthy controls, the researchers found that the multiple sclerosis patients diagnosed with depression showed a smaller CA23DG sub-region of the hippocampus, along with excessive release of cortisol from the HPA axis.

"Interestingly, this idea of a link between excessive activity of the HPA axis and reduced brain volume in the hippocampus hasn't received a lot of attention, despite the fact that the most consistently reproduced findings in psychiatric patients with depression (but without MS) include hyperactivity of the HPA axis and smaller volumes of the hippocampus," Sicotte said.

"So the next step is to compare MS patients with depression to psychiatric patients with depression to see how the disease progresses in each," she said.

Other authors of the study included Kyle C. Kern, Mary-Frances O'Connor, Michael J. Montag, Aileen Kim, Ye S. Yoo and Barbara S. Giesser, all of UCLA.

Funding was provided by the National Multiple Sclerosis Society, the National Institutes of Health, the UCLA Cousins Center for Psychoneuroimmunology, and Claire and William Vaughn.


Story Source:

The above story is based on materials provided by University of California - Los Angeles. Note: Materials may be edited for content and length.


Journal Reference:

  1. Gold et al. Smaller Cornu Ammonis 2-3/Dentate Gyrus Volumes and Elevated Cortisol in Multiple Sclerosis Patients with Depressive Symptoms. Biological Psychiatry, 2010; DOI: 10.1016/j.biopsych.2010.04.025

Cite This Page:

University of California - Los Angeles. "Brain atrophy responsible for depression in people battling multiple sclerosis." ScienceDaily. ScienceDaily, 4 July 2010. <www.sciencedaily.com/releases/2010/07/100701145533.htm>.
University of California - Los Angeles. (2010, July 4). Brain atrophy responsible for depression in people battling multiple sclerosis. ScienceDaily. Retrieved March 6, 2015 from www.sciencedaily.com/releases/2010/07/100701145533.htm
University of California - Los Angeles. "Brain atrophy responsible for depression in people battling multiple sclerosis." ScienceDaily. www.sciencedaily.com/releases/2010/07/100701145533.htm (accessed March 6, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Friday, March 6, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Bupa Eyes India Healthcare Opportunities

Bupa Eyes India Healthcare Opportunities

Reuters - Business Video Online (Mar. 5, 2015) Bupa is hoping to expand in India&apos;s fast-growing health insurance market, once a rule change on foreign investment is implemented. The British private healthcare group&apos;s CEO tells Grace Pascoe why it&apos;s so keen on the new opportunity. Video provided by Reuters
Powered by NewsLook.com
Doctor in Your Pocket Is Getting Smarter

Doctor in Your Pocket Is Getting Smarter

Reuters - Business Video Online (Mar. 5, 2015) Mobile apps are turning smartphones into a personal doctors, with users able to measure heart rate, blood pressure and even blood sugar. But will it change our behaviour? Ivor Bennett reports from the Mobile World Congress in Barcelona. Video provided by Reuters
Powered by NewsLook.com
AbbVie Inks $21B Deal To Buy Cancer Drugmaker Pharmacyclics

AbbVie Inks $21B Deal To Buy Cancer Drugmaker Pharmacyclics

Newsy (Mar. 5, 2015) AbbVie announced Wednesday it will buy cancer drugmaker Pharmacyclics in a $21 billion deal. Video provided by Newsy
Powered by NewsLook.com
Toddlers Drinking Coffee? Why You Shouldn't Share Your Joe

Toddlers Drinking Coffee? Why You Shouldn't Share Your Joe

Newsy (Mar. 5, 2015) A survey of Boston mothers and toddlers found that 15 percent of two-year-olds drink coffee and 2.5 percent of 1-year-olds. 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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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