A protein called GPNMB as a possible target for cancer drugs
Original title: Glycoprotein nonmetastatic B as a pharmacological target in cancer: structural mechanisms, druggability, and therapeutic translation.
How far along is this research?
- Lab cells
- Animals
- Review
- Tested in people
This looks across many earlier studies rather than running a new one.
This is a summary of where the science is heading, not a new result or a treatment you can get.
The short version
Researchers are looking at a protein found at high levels in many cancers, including glioblastoma: The fastest-growing type of glioma (grade 4). Treatment usually starts soon after diagnosis: surgery first, then radiation and chemotherapy. See the glossary, to see if drugs can be aimed at it.
What was studied. This is a review paper. The authors pulled together past research on a protein called GPNMB, what it does inside cancer cells, and how drugs might target it. No new patients were studied here.
What they found. GPNMB sits mostly in a part of the cell called the lysosome, and cancer cells make more of it when they are under stress. In tumors it appears to help cells grow, spread, and hide from the immune system. High GPNMB levels are linked to worse outcomes in breast cancer, liver cancer, lung cancer, glioblastoma: The fastest-growing type of glioma (grade 4). Treatment usually starts soon after diagnosis: surgery first, then radiation and chemotherapy. See the glossary, stomach cancer, and bone cancer. One drug aimed at GPNMB, glembatumumab vedotin, has shown activity in triple negative breast cancer and melanoma, but it is held back by uneven GPNMB levels in tumors and by side effects that limit the dose.
What this means, and what it doesn't
What it could mean: GPNMB may turn out to be a useful target for future cancer drugs. Levels of it might also help doctors judge how a cancer is likely to behave. For someone living with a brain tumor today, this is background science, not something to ask for at an appointment.
What it doesn't mean: This is a review of work already done, not a new study and not a trial result. No treatment was tested in people here. The GPNMB drug mentioned was tried in breast cancer and melanoma, not in brain tumors. Nothing in this paper shows that targeting GPNMB helps people with glioblastoma: The fastest-growing type of glioma (grade 4). Treatment usually starts soon after diagnosis: surgery first, then radiation and chemotherapy. See the glossary. It is not a cure, and it is a long way from everyday care.
Source: PubMed, July 26, 2026 · Read the original
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