Lab study finds a protein chain that may help brain tumor cells spread
Original title: Gap Junction Protein Connexin43 (Cx43) Promotes Glioma Invasion via the Annexin A2/MMP3 Signaling Axis
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 only done with cells in a lab dish.
The short version
Scientists found a chain of proteins that seems to help glioblastoma: A glioma that is given grade 4, the highest grade. It grows fast. Treatment usually starts soon after it is found. It often means surgery, then radiation and chemotherapy. See the glossary cells push into nearby tissue.
What was studied. Researchers studied glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are given a grade from 1 to 4 describing how the tumor is expected to behave. See the glossary tumor cells in the lab. They looked at how a protein that links cells together might help the cells spread.
What they found. When cells had more of this linking protein, it pulled a helper protein to the spots where cells touch. This helper protein works with a partner, and together they seem to switch on an enzyme that breaks down the tissue around cells. When the team used a small lab-made protein to block the helper and its partner, the enzyme was less active and the tumor cells spread less in a gel that acts like body tissue.
What this means, and what it doesn't
What it could mean: This gives scientists a clearer picture of how glioblastoma: A glioma that is given grade 4, the highest grade. It grows fast. Treatment usually starts soon after it is found. It often means surgery, then radiation and chemotherapy. See the glossary cells may spread. The helper protein and its partner could one day be a target for new treatments.
What it doesn't mean: This was done only with cells in a lab. It has not been tested in animals or people. It is far from a treatment a doctor can offer, and it is not a cure.
Source: bioRxiv (preprint), September 17, 2026 · Read the original
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