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American Focus > Blog > Tech and Science > Virus Traces Discovered in The Brain Lining of People With Schizophrenia : ScienceAlert
Tech and Science

Virus Traces Discovered in The Brain Lining of People With Schizophrenia : ScienceAlert

Last updated: July 19, 2025 3:00 pm
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Virus Traces Discovered in The Brain Lining of People With Schizophrenia : ScienceAlert
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The Role of Hepatitis C Virus in Mental Health Disorders

A recent study has suggested a potential link between the hepatitis C virus (HCV) and various mental health disorders such as schizophrenia, bipolar disorder, and major depression.

While experts have previously noted connections between psychiatric conditions and viral infections, including HCV, direct evidence of viruses within the human brain has been scarce.

However, a new study conducted by researchers at Johns Hopkins University has uncovered traces of 13 different viral species in the protective lining of the brain. Among these viruses, HCV showed a significant association with schizophrenia and bipolar disorder when compared to individuals without mental health issues.

Exploring the Choroid Plexus

The researchers focused their investigation on the choroid plexus, a structure responsible for producing cerebrospinal fluid that surrounds and protects the brain and spinal cord. This network of capillaries and connective tissue is known to be susceptible to viral infections, making it a prime location for studying viral presence in the brain.

By analyzing postmortem brain samples from individuals with psychiatric disorders and healthy controls, the study aimed to identify hidden viruses using advanced sequencing techniques.

The findings revealed a range of viral sequences in the choroid plexus, with a higher prevalence in samples from patients with schizophrenia and bipolar disorder. Among these viruses, HCV stood out as the only species with a statistically significant association with psychiatric disorders.

Implications for Treatment

Further analysis using a large health records database confirmed a higher prevalence of HCV in individuals with schizophrenia and bipolar disorder compared to those with major depression and the general population.

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While the study found evidence of viruses only in the brain lining and not in the hippocampus, a region crucial for cognitive functions, patients with HCV in the lining exhibited altered gene expression in the hippocampus.

Although more research is needed to understand the mechanisms underlying the relationship between viruses and psychiatric disorders, the study’s findings suggest a potential avenue for novel treatment approaches.

According to Sarven Sabunciyan, a neuroscientist involved in the study, the possibility of treating psychiatric symptoms associated with viral infections like HCV using antiviral drugs offers hope for individuals struggling with these debilitating conditions.

The study was published in Translational Psychiatry and sheds light on the potential impact of viral infections on mental health.

TAGGED:brainDiscoveredliningpeopleSchizophreniaScienceAlertTracesvirus
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