Gut bacteria may change brain tumors in mice
Original title: Gut microbiota induces immune-related alterations in gene expression, RNA methylation, and metabolism in glioblastoma revealed by single-cell and spatial multi-omics.
How far along is this research?
- Lab cells
- Animals
- Review
- Tested in people
This was done in animals, not people. Most findings at this stage never become treatments.
This was only done in mice.
The short version
In mice, changing the gut bacteria changed how a brain tumor behaved.
What was studied. Researchers studied mice with glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are graded 1 to 4 by how fast they tend to grow. See the glossary, a type of brain tumor. They gave some of the mice antibiotics to disrupt the bacteria in the gut. Then they compared the tumors in those mice to the tumors in other mice.
What they found. The tumors in the antibiotic-treated mice showed changes in gene activity. One gene, Epha6, was less active. Another gene, Tead1, was more active. The tumors in those mice also had lower levels of methionine, a substance the body gets partly from gut bacteria. The immune signals inside the tumors changed as well.
What this means, and what it doesn't
What it could mean: This adds to the idea that the gut and the brain are connected, and that gut bacteria might affect how a brain tumor grows. It points researchers toward the EPHA pathway as something worth studying further.
What it doesn't mean: This was done in mice, not in people. It does not mean antibiotics treat or help a brain tumor. It does not mean changing your gut bacteria, your diet, or your supplements will slow a tumor. Nobody should start or stop any medicine based on this. This is early lab science, far from everyday care, and it is not a promise of a cure.
Source: PubMed, July 15, 2026 · Read the original
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