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Getting the latest healthcare news for you
Researchers at the University of Basel are flipping the script on coronin proteins, long believed to primarily regulate the cell's structural skeleton. A new PLOS Biology study finds coronins are largely dispensable for actin cytoskeleton organization and instead play a key role in cell signaling — including keeping T cell numbers in check for immune defense.
For decades, coronin proteins have been textbook regulators of the actin cytoskeleton — the internal scaffolding that gives cells their shape and mobility. But a new study from the University of Basel's Biozentrum is challenging that long-held assumption. Researchers found that cells lacking coronins can still organize and remodel their actin networks normally, suggesting coronins may not be the cytoskeleton gatekeepers science thought they were.
The team also flagged a methodological concern that may have skewed prior research: molecular tags commonly used to track proteins inside cells can actually disrupt coronin function and alter where they appear in the cell. Many antibodies used to detect coronins were also found to lack specificity — raising broader red flags about experimental reliability in the field.
So what are coronins doing? The researchers point to cell signaling as a more central role. In the immune system, coronin-driven signaling has been shown to be essential for maintaining normal T cell numbers — a critical line of defense against infections and cancer.
Key Takeaways
Why it matters: Reclassifying coronins as signaling proteins rather than cytoskeletal regulators could reshape how researchers approach immune dysfunction, T cell-related diseases, and potentially cancer biology.
