Serotonin genes linked to slower growing brain tumors
Original title: A Subset of G Protein-Coupled Serotonin Receptor Genes is Linked to a Neuronal Gene Expression Signature and Clinically Favorable Biology in IDH-Mutant Gliomas
How far along is this research?
This is a preprint. Other scientists have not checked it yet, so treat it as an early signal rather than an answer.
This was a computer study of tumor records already collected, not a new treatment tested in people.
The short version
In some brain tumors, higher levels of certain serotonin genes went with longer life.
What was studied. Researchers studied gene activity and health records from two large brain tumor databases. All the tumors were lower grade gliomas, a slower growing kind of brain tumor.
What they found. Four serotonin receptor genes stood out. They were HTR1A, HTR2A, HTR2C, and HTR6. Tumors with more of these genes were tied to longer life, and two of them still stood out after the team took age, sex, tumor grade, and tumor type into account. These genes were most active in tumors with a change in the IDH gene, which often grow more slowly.
What this means, and what it doesn't
What it could mean: This may help explain why some brain tumors grow more slowly than others. Over time it could help doctors judge how a tumor is likely to behave. It does not change any treatment today.
What it doesn't mean: This does not mean serotonin drugs treat brain tumors. No one was given a drug or any new treatment in this study. The team used tumor samples and records that were already collected, and studied them on a computer. This is early science and it is far from everyday care. It is not a promise of a cure.
Source: bioRxiv (preprint), August 24, 2026 · Read the original
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