Conditions & Recovery · ScienceDaily Cancer · August 8, 2026

A protein older than blood circulation could transform cancer immunotherapy

A protein that evolved long before the human circulatory system may help unlock stronger cancer treatments. When C3 is produced inside tumors, it blocks immune-suppressing cells and gives immunotherapy a better chance to work. Researchers were even able to recreate this effect in resistant tumors, significantly improving survival in mice.

Originally published by ScienceDaily Cancer. We curate and add context; they did the reporting.

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