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Method Monitors Neuropsychiatric Symptoms

Researchers from Wake Forest University School of Medicine have discovered a noninvasive method to monitor neuropsychiatric symptoms in patients with lupus. Magnetic resonance spectroscopy (MRS), a technique closely related to MRI (magnetic resonance imaging), uses strong magnetic fields and low energy radio waves to get biochemical information about the body.

The study on mice is the first to demonstrate that MRS is a feasible method to monitor neuropsychiatric symptoms in lupus, said Nilamadhab Mishra, M.D., the principal investigator, in a presentation at the American College of Rheumatology meeting in Washington.

The new technique attaches a spectrometer to a MRI machine to measure changes in metabolites, such as the levels of glutamate and glutamine.

Method Monitors Neuropsychiatric Symptoms“Because of its noninvasiveness and repeatable nature, MRS could be helpful in the drug discovery program for neuropsychiatric lupus,” said Mishra, an assistant professor of rheumatology. He explained, “No definitive biomarker of neuropsychiatric lupus is available and this impedes both clinical diagnosis and drug discovery for treatment of this condition.”

According to the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), in neuropsychiatric lupus, there are a wide variety of associated neurological and psychiatric syndromes and cognitive problems.

NIAMS, which is supporting Mishra’s work, said that about 20 percent of lupus patients have neuropsychiatric symptoms and it is one of the major causes of death among people with lupus. Systemic lupus affects an estimated 1.5 million Americans, mostly women.

In his study, Mishra is using mice that have a defective gene and spontaneously develop lupus, including lymph node swelling and increased spleen size. He is comparing these animals with control animals that do not have lupus.

His results showed “a dramatic decrease” in the ratio of two biochemicals, glutamate and glutamine as measured by MRS in the mice with lupus compared with control mice as early as seven weeks of life, which directly paralleled behavioral tests. Other biochemical pairs also showed changes, but not as dramatically as glutamate/glutamine. At 11 and 15 weeks, there were significant further decreases in the glutamate/glutamine ratio.

Mishra and his colleagues tested cognitive performance using a water maze test, a standard test to assess spatial learning and memory in rodents. “The water maze test measures memory, learning and cognitive function. We correlated the changes in metabolites in different age groups to behavior changes,” he said.

The mice in the lupus group had significantly poorer cognitive function at seven weeks, tracking the decline in the glutamate/glutamine ratio. Cognitive function “continued to deteriorate further with advancing age, whereas there was no change in control mice.”

“This tells us that MRS can be useful for monitoring the disease instead of time-consuming behavioral studies,” he said. The changes in the glutamate/glutamine ratio indicate that the neuropsychiatric lupus is getting progressively worse.

But precisely how the biochemical changes equate to neuropsychiatric symptoms in people will await future human studies, he said.

Source: Wake Forest University School of Medicine

Method Monitors Neuropsychiatric Symptoms

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). Method Monitors Neuropsychiatric Symptoms. Psych Central. Retrieved on December 10, 2018, from https://psychcentral.com/news/2006/11/14/new-method-monitors-neuropsychiatric-symptoms/407.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.