A protein may help brain tumors hide from the immune system
Original title: Cross-species spatial profiling links progranulin to an immune suppressive niche in brain metastasis.
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 done in mice and in stored tissue samples, not as a treatment in people.
The short version
In mice, removing a protein called progranulin left less tumor in the brain.
What was studied. Researchers used five mouse models of cancer that had spread to the brain. They mapped which cells sit where inside the tumors. They also checked stored tissue data from people.
What they found. The maps showed clusters of immune cells packed around the tumors. A protein called progranulin looked like it helped build those clusters. When mice were missing this protein, there was less tumor in the brain. In the human data, areas high in this protein sat next to immune cells that were worn out.
What this means, and what it doesn't
What it could mean: This points to a possible new target for future drugs. About 50% of patients do not respond to today's immune drugs. Work like this may help explain why some people do not respond.
What it doesn't mean: This is not a treatment anyone can get. It is early lab work in mice and in stored human tissue. No drug for this protein has been tested in people with brain tumors. It is not proof that this will help patients, and it is not a cure.
Source: PubMed, September 19, 2026 · Read the original
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