Schizophrenia is one of the most serious mental health disorders. It affects how people think, feel, and understand reality.
People with schizophrenia may hear voices that others do not hear, hold false beliefs, have trouble organizing their thoughts, or withdraw from social activities. The condition often begins in late adolescence or early adulthood and can have a major impact on education, work, relationships, and daily life.
For decades, scientists have known that schizophrenia tends to run in families. If a close family member has the condition, a person’s risk is higher than average. This strong family pattern suggests that genetics plays an important role. However, identifying the exact genes involved has been extremely difficult.
Unlike some diseases that are caused by changes in one or a few genes, schizophrenia appears to involve many genes working together. Researchers have compared the search for schizophrenia genes to looking for needles in a haystack because thousands of genetic variations may each contribute a very small amount to risk.
A new study has now shed fresh light on this mystery. Researchers at the Lieber Institute for Brain Development and collaborators from the University of Bari in Italy and more than 60 psychiatric hospitals worldwide have developed a new way to study the genetics of schizophrenia. Their findings were published in the journal Nature Genetics.
The scientists analyzed genetic information from more than 102,000 individuals. They also examined brain tissue samples from hundreds of donors across six different regions of the brain.
Traditionally, researchers studying genetic diseases mainly focus on DNA changes that sit very close to a gene. The idea is that nearby genetic variants are most likely to affect that gene’s behavior. However, scientists increasingly realize that this approach misses a large part of the picture.
Genes do not function in isolation. They interact in complex networks and can be influenced by DNA regions located far away. A distant genetic change may still affect how a gene behaves, much like a person living in another city can influence someone through social networks, online communication, or business relationships.
To capture these long-distance relationships, the research team created new computer models that map how genes work together throughout the brain. The models allowed the scientists to examine communication networks among genes instead of looking only at individual genes one by one.
The results were remarkable. The researchers identified 641 previously unrecognized genes that appear to be associated with schizophrenia. These genes would not have been discovered using traditional methods.
The newly identified genes point toward several important biological systems. Many of the genes were involved in glutamate signaling, which helps brain cells communicate with one another.
Others were linked to brain development and the growth of neural circuits. Some genes were involved in immune processes, suggesting that the body’s immune system may also influence brain health and psychiatric disorders.
These findings support the idea that schizophrenia is not caused by a single faulty gene. Instead, it appears to result from disturbances in coordinated genetic programs that influence how the brain develops and functions.
The study also highlights the growing role of advanced computing and artificial intelligence in medical research. Modern computer methods can process enormous amounts of genetic information and uncover patterns that would be nearly impossible for humans to identify on their own.
The researchers believe this work may eventually contribute to precision psychiatry. This approach aims to tailor treatments according to a person’s individual biology rather than treating all patients in the same way. Understanding which genetic networks are disrupted in different individuals could eventually help researchers develop more targeted therapies.
The study’s findings represent an important advance in understanding one of the most complex disorders in medicine. However, the newly identified genes do not immediately lead to new treatments, and they cannot be used to predict who will develop schizophrenia. Much more work is needed to understand exactly how these genes influence the brain.
Nevertheless, the research provides a more complete map of schizophrenia’s genetic architecture.
By looking beyond nearby DNA and studying how genes communicate across networks, scientists are gaining a deeper understanding of how biological processes inside the brain may contribute to mental illness. This knowledge may ultimately open new pathways for diagnosis, prevention, and treatment.
If you care about nutrition, please read studies that ultra-processed foods may make you feel depressed, and Vitamin D could help reduce depression symptoms.
For more information about nutrition, please see recent studies about antioxidants that could help reduce the risk of dementia, and Omega-3 supplements could improve memory functions in older people.
Source: Lieber Institute for Brain Development.
