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News
Scientists at Washington University have discovered hidden lymph node-like immune structures inside the skull bone marrow of mice — acting as rapid first responders against brain cancer. Boosting these structures with a targeted gel treatment improved tumor rejection and survival. Similar immune cells were also found in human skull bone marrow, hinting at broad therapeutic potential.
Scientists at Washington University School of Medicine in St. Louis have uncovered a previously unknown "immune organ" tucked inside the skull's bone marrow — and it may be one of the brain's fastest lines of defense against cancer. Published in Nature, the study found organized, lymph node-like immune structures in mice that spring into action against brain tumors before distant lymph nodes even receive a signal. Crucially, similar immune cells were also identified in human skull bone marrow, suggesting this isn't just a mouse phenomenon.
To test whether these hubs actually matter, researchers disrupted them in a glioblastoma mouse model — tumors grew faster and survival dropped. Then they flipped the script: a gel containing three immune-boosting proteins, placed under the scalp, supercharged the skull's immune hubs and led to better tumor rejection and longer survival.
Key Takeaways:
Why it matters: Beyond brain cancer, these skull-adjacent immune hubs could offer a new, targeted route to treat neurological diseases — including Alzheimer's, Parkinson's, and long COVID — with fewer systemic side effects.
