A protein from breast cancer may help it spread to the brain and spine
Original title: Breast Cancer-derived PDGFB Remodels the CNS Vascular Niche to Promote Brain, Spinal and Leptomeningeal Metastasis
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 done in lab dishes and in mice, not in people.
The short version
Scientists found a protein that may help breast cancer reach the brain and spine.
What was studied. Researchers made breast cancer cells that produce extra of a protein called PDGFB. They tested the cells in lab dishes and in mice, plus patient gene data.
What they found. Extra PDGFB made brain blood vessel cells grow and leak more. It also broke down the tight seals between those cells. In mice, more cancer grew in the brain, the spine, and the nearby lining.
What this means, and what it doesn't
What it could mean: This points to one way breast cancer may reach the brain and spine. It gives scientists a target they can study next. The mouse setup also gives them a new way to study spinal spread.
What it doesn't mean: This does not mean a new treatment is ready. The work was done in lab dishes and in mice. No drug was given to patients here. It is not a cure. It does not change care today.
Source: bioRxiv (preprint), October 16, 2026 · Read the original
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