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Depression affects how women with PMDD respond to stress, pain

Date:
April 13, 2010
Source:
University of North Carolina School of Medicine
Summary:
A severe mood disorder, premenstrual dysphoric disorder, affects 5 percent to 7 percent of all women of reproductive age in the United States, but it is often misdiagnosed as major depression or other mood disorder. A recent study further establishes that PMDD is biologically different, and that women with PMDD who have experienced depression could make up a subset.

A severe mood disorder, premenstrual dysphoric disorder, affects 5 percent to 7 percent of all women of reproductive age in the United States, but it is often misdiagnosed as major depression or other mood disorder.

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A recent study further establishes that PMDD is biologically different, and that women with PMDD who have experienced depression could make up a subset.

The findings are important because they give physicians more reason to search for a more specific diagnosis and could possibly lead to more precise treatments, of which there are currently few good choices, said Susan Girdler, Ph.D., professor of psychiatry at the University of North Carolina at Chapel Hill School of Medicine who led the study.

"PMDD is not garden-variety premenstrual symptoms. PMDD causes severe impairment in quality of life, equivalent to post-traumatic stress disorder, major depressive disorder and panic disorder, that continually cycles on a monthly basis. Some women spend half their lives suffering from this disorder," said Girdler, who also is director of the Stress and Health Research Program in UNC's Center for Women's Mood Disorders.

In a study published ahead of print in the journal Biological Psychology, Girdler and her colleagues measured biological responses to stress and pain. Previous studies demonstrated that women with chronic major depression have a heightened biological response to stress and release more stress hormones, such as cortisol. And, Girdler and her group have previously shown that women with PMDD respond conversely, with blunted stress responses.

The current study is the first known head-to-head comparison of the two groups and confirmed earlier findings.

"We found the greatest weight of evidence that PMDD and major depression are really two distinct entities in terms of biological response to stress and with respect to pain sensitivity and pain mechanisms," Girdler said.

But more important, Girdler said, was the finding that women with PMDD who also had experienced depression in the past looked different from PMDD women who had never been depressed. Only the PMDD women with prior depression had lower cortisol and greater sensitivity to pain compared to non-PMDD women with prior depression. These differences between PMDD and non-PMDD women were not seen in women who had no depression history.

"So while the study shows that PMDD is biologically different from major depression, a history of depression may have special relevance for women with PMDD with respect to stress hormones and pain response," Girdler said.

Current treatments for PMDD are effective in only about half of women. But, Girdler says, gathering more biological clues about PMDD could expand the treatment options.

Girdler and her colleagues are currently enrolling women with PMDD who would receive free diagnostic and medical tests, and who may be eligible for treatment studies and studies providing monetary compensation. Interested participants should call the UNC Center for Women's Mood Disorders at 919-966-2547.

UNC recently expanded the Center for Women's Mood Disorders to Rex Healthcare in Raleigh, where women can be seen for both a clinical evaluation and can be enrolled in research studies.


Story Source:

The above story is based on materials provided by University of North Carolina School of Medicine. Note: Materials may be edited for content and length.


Journal Reference:

  1. Rebecca R. Klatzkin, Monica E. Lindgren, Catherine A. Forneris, Susan S. Girdler. Histories of major depression and premenstrual dysphoric disorder: Evidence for phenotypic differences. Biological Psychology, 2010; DOI: 10.1016/j.biopsycho.2010.01.018

Cite This Page:

University of North Carolina School of Medicine. "Depression affects how women with PMDD respond to stress, pain." ScienceDaily. ScienceDaily, 13 April 2010. <www.sciencedaily.com/releases/2010/03/100330092819.htm>.
University of North Carolina School of Medicine. (2010, April 13). Depression affects how women with PMDD respond to stress, pain. ScienceDaily. Retrieved April 1, 2015 from www.sciencedaily.com/releases/2010/03/100330092819.htm
University of North Carolina School of Medicine. "Depression affects how women with PMDD respond to stress, pain." ScienceDaily. www.sciencedaily.com/releases/2010/03/100330092819.htm (accessed April 1, 2015).

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