Schizophrenia is a serious mental disorder that hinders an individual’s ability to think, behave, and feel. One of the symptoms of this disorder is difficulty incorporating new information about the world, leading individuals with schizophrenia to lose touch with reality.
MIT neuroscientists have identified a genetic mutation in the grin2a gene that may contribute to this symptom. This mutation was originally identified in a large-scale screen of patients with schizophrenia. Researchers studied mice with this mutation and found that they had difficulty adapting their decisions when situations changed, meaning they struggled to update their understanding based on new input, mirroring what happens in people with schizophrenia.
The study concluded that this issue is linked to a malfunction in a brain circuit between the thalamus and prefrontal cortex. Scientists were able to restore normal behavior in the mice by stimulating this circuit, suggesting that targeting it with drugs could help treat cognitive symptoms of schizophrenia in the future.
What I found especially interesting is that the study does not claim this mutation directly causes schizophrenia, but instead contributes to one of its key cognitive symptoms. This reinforces the idea that schizophrenia is a complex disorder influenced by multiple genes and environmental factors, rather than a single cause. It also shows how scientists are beginning to break down mental illnesses into specific biological mechanisms, which could lead to more targeted and effective treatments.
Additional website: https://www.sciencedaily.com/releases/2026/04/260402042740.htm
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