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Genetic Inflammation Linked to Neuropsychiatric Illness

By NS Desk | Research | Posted on :   02-Apr-2022

London: UK researchers have identified a potential link between inflammation and the structure of specific regions of the brain, which may help in the treatment of neurodevelopmental psychiatric disorders including autism spectrum and schizophrenia.

According to the study, published in JAMA Psychiatry, the findings could open up a completely new target for the pharmacological treatment of these disorders, which has not significantly changed since the identification of antipsychotic medications in the mid-late 20th century.

Researchers at the University of Birmingham showed that genes associated with inflammation, particularly interleukin (IL) 6, are linked to a reduction in grey matter volume in certain areas of the brain known to be implicated in neuropsychiatric disorders.

In the study, the team was able to compare genetic variants which affect levels of IL-6, and other inflammatory genes in more than 20,000 patients with changes in grey matter volume in specific areas of the brain.

They were able to show strong links between IL-6 and brain structure particularly in the temporal and frontal regions.

Further analysis using the Allen Human Brain Atlas, showed that genes overexpressed in these areas are associated with conditions such as epilepsy, cognitive dysfunction, and schizophrenia.

"This study shows that the IL-6 gene, which we know to be linked to systemic inflammation, also affects brain structure in areas associated with these neuropsychiatric disorders. This could be the first new target for severe mental illnesses including schizophrenia identified in more than 60 years," said Professor Rachel Upthegrove, in the University's Institute for Mental Health.

Current treatments for these illnesses act on dopamine, a chemical messenger in the brain associated with mood and attention.

These drugs can have side effects, however, and they are not effective in all patients.

"There are drugs already on the market which target inflammation as well as the opportunity to screen potential new compounds. Finding a new avenue for exploring the links between inflammation, brain structure and neuropsychiatric disorders is really exciting," said John Williams, of the Institute for Cancer and Genomic Sciences at the University. (agency)
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NS Desk

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