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Chronic Stress Lowers Aging and Cognitive Hormones in Women

Chronic Stress Lowers Aging and Cognitive Hormones in Women

A new study finds that women under chronic stress have significantly lower levels of klotho, a hormone that regulates aging and enhances cognition.

In a novel study design, researchers at University of California, San Francisco (UCSF) compared mothers of children on the autism spectrum to low-stress controls.

Investigators found that the women in their study with clinically significant depressive symptoms had even lower levels of klotho in their blood than those who were under stress but not experiencing such symptoms.

The study, published in the journal Translational Psychiatry, is the first to show a relationship between psychological influences and klotho, which performs a wide variety of functions in the body.

“Our findings suggest that klotho, which we now know is very important to health, could be a link between chronic stress and premature disease and death,” said lead author, Aric Prather, Ph.D., an assistant professor of psychiatry at UCSF.

“Since our study is observational, we cannot say that chronic stress directly caused lower klotho levels, but the new connection opens avenues of research that converge upon aging, mental health, and age-related diseases.”

Scientists know from their work in mice and worms that, when klotho is disrupted, it promotes symptoms of aging, such as hardening of the arteries and the loss of muscle and bone, and when klotho is made more abundant, the animals live longer.

In previous work, senior author Dena Dubal, M.D., Ph.D., showed that a genetic variant carried by one in five people is associated with having more klotho in the bloodstream, better cognitive function and a larger region of the prefrontal cortex.

Carriers also tend to live longer and have lower rates of age-related disease. Dubal and colleagues found that increasing klotho in mice boosted their cognition and increased resilience to Alzheimer-related toxins, suggesting a therapeutic role for klotho in the brain.

In the current study, researchers followed 90 high-stress caregivers and 88 low-stress controls, most of whom were in their 30s and 40s and otherwise healthy.

Klotho is known to decline with age, but in this cross-sectional study of relatively young women, this decline only happened among the high-stress women. The low-stress women did not show a significant reduction in klotho with aging.

“Chronic stress transmits risk for bad health outcomes in aging, including cardiovascular and Alzheimer’s disease,” said Dubal, an assistant professor in the UCSF Department of Neurology and the David A. Coulter Endowed Chair in Aging and Neurodegenerative Disease.

“It will be important to figure out if higher levels of klotho can benefit mind and body health as we age. If so, therapeutics or lifestyle interventions that increase the longevity hormone could have a big impact on people’s lives.”

The researchers hypothesized that lower levels of klotho could contribute to stress and depression, since klotho acts on a variety of cellular, molecular, and neural pathways that link to stress and depression.

Source: University of California, San Francisco/EurekAlert

Chronic Stress Lowers Aging and Cognitive Hormones in Women

Rick Nauert PhD

Rick Nauert, PhDDr. Rick Nauert has over 25 years experience in clinical, administrative and academic healthcare. He is currently an associate professor for Rocky Mountain University of Health Professionals doctoral program in health promotion and wellness. Dr. Nauert began his career as a clinical physical therapist and served as a regional manager for a publicly traded multidisciplinary rehabilitation agency for 12 years. He has masters degrees in health-fitness management and healthcare administration and a doctoral degree from The University of Texas at Austin focused on health care informatics, health administration, health education and health policy. His research efforts included the area of telehealth with a specialty in disease management.

APA Reference
Nauert PhD, R. (2015). Chronic Stress Lowers Aging and Cognitive Hormones in Women. Psych Central. Retrieved on August 18, 2018, from https://psychcentral.com/news/2015/06/17/chronic-stress-lowers-aging-and-cognitive-hormones-in-women/85795.html

 

Scientifically Reviewed
Last updated: 6 Oct 2015
Last reviewed: By John M. Grohol, Psy.D. on 6 Oct 2015
Published on PsychCentral.com. All rights reserved.