Philadelphia, February 7, 2019
Patients with psychosis have accelerated aging of two brain networks important for general cognition—the frontoparietal network (FPN) and cingulo-opercular network (CON)—according to a new study in Biological Psychiatry. Efficiency of the FPN network was normal in early psychosis but reduced in chronic patients, indicating that the decline happens after illness onset. The findings support the idea that intervention to boost these brain networks after early signs of psychosis may help patients have better functional outcomes later in life.
“There is growing evidence that normal biological aging is accelerated in psychotic disorders. One aspect of healthy aging is declining cognitive function and less efficient communication within brain networks supporting cognitive abilities, including planning, problem solving, and memory,” said lead author Julia M. Sheffield, PhD, Vanderbilt University Medical Center. Communication within the FPN and CON networks shows the earliest signs of decline in healthy aging, so the new findings indicate that people with psychosis demonstrate normal patterns of brain aging, but at an accelerated rate.
In the study, Dr. Sheffield and colleagues used brain imaging to compare the connectivity between brain regions—a measure of how efficiently the regions communicate—in 240 patients with psychotic disorder (including schizophrenia and psychotic bipolar disorder) and 178 healthy controls. “The accelerated decline was specific to cognitive networks, providing evidence that accelerated aging is not due to a global reduction in efficient communication across the whole brain,” said Dr. Sheffield.
https://www.elsevier.com/__data/assets/image/0006/844638/Normal-brain-aging-patterns-occur-at-a-faster-rate-in-people-with-psychosis.jpg" alt="A bar chart showing that the patients with psychosis have a significantly lower brain network efficiency." title="A bar chart showing that the patients with psychosis have a significantly lower brain network efficiency." width="640" height="441" />
This graph depicts group differences in network efficiency. Specifically, patients with psychosis showed significantly reduced global efficiency in the frontoparietal and subcortical networks, in comparison to healthy controls.
“The premature ‘aging’ or degeneration of cortical networks has been increasingly documented in association with schizophrenia. However, we have very little insight into the underlying mechanisms. Linking these imaging findings to mechanism is a critical step to understanding the progression of schizophrenia so that we may disrupt it,” said John Krystal, MD, Editor of Biological Psychiatry.
The finding that the decline in network efficiency appeared to begin after illness onset is particularly important for the potential to disrupt this progression. “With advances in cognitive remediation and the positive impact of exercise on connectivity of these networks, our findings provide hope that young adults with recent onset psychosis will benefit from interventions bolstering connectivity within these networks, potentially slowing down or normalizing the rate of decline in efficiency and, therefore, cognitive function,” said Dr. Sheffield.
The findings of the new study help researchers understand how brain networks change over the course of psychotic disorders, and suggest that targeting these networks could disrupt the accelerated rate of normal aging in people with early stages of psychosis.
Notes for editors
The article is "Accelerated aging of functional brain networks supporting cognitive function in psychotic disorders," by Julia M. Sheffield, Baxter P. Rogers, Jennifer U. Blackford, Stephan Heckers, and Neil D. Woodward (https://doi.org/10.1016/j.biopsych.2018.12.016). It appears in Biological Psychiatry, published by Elsevier.
Copies of this paper are available to credentialed journalists upon request; please contact Rhiannon Bugno at Biol.Psych@sobp.org or +1 214 648 0880. Journalists wishing to interview the authors may contact Julia M. Sheffield, PhD, at email@example.com or +1 615 875 9434.
The authors’ affiliations and disclosures of financial and conflicts of interests are available in the article.
John H. Krystal, MD, is Chairman of the Department of Psychiatry at the Yale University School of Medicine, Chief of Psychiatry at Yale-New Haven Hospital, and a research psychiatrist at the VA Connecticut Healthcare System. His disclosures of financial and conflicts of interests are available here.
About Biological Psychiatry
Biological Psychiatry is the official journal of the Society of Biological Psychiatry, whose purpose is to promote excellence in scientific research and education in fields that investigate the nature, causes, mechanisms and treatments of disorders of thought, emotion, or behavior. In accord with this mission, this peer-reviewed, rapid-publication, international journal publishes both basic and clinical contributions from all disciplines and research areas relevant to the pathophysiology and treatment of major psychiatric disorders.
The journal publishes novel results of original research which represent an important new lead or significant impact on the field, particularly those addressing genetic and environmental risk factors, neural circuitry and neurochemistry, and important new therapeutic approaches. Reviews and commentaries that focus on topics of current research and interest are also encouraged.
Biological Psychiatry is one of the most selective and highly cited journals in the field of psychiatric neuroscience. It is ranked 6th out of 142 Psychiatry titles and 9th out of 261 Neurosciences titles in the Journal Citations Reports® published by Clarivate Analytics. The 2017 Impact Factor score for Biological Psychiatry is 11.982. http://www.sobp.org/journal
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Rhiannon Bugno, Editorial Office
+1 214 648 0880