New research is revealing how too much sunlight can push healthy skin cells closer to cancer. Scientists have identified a key protein, YTHDF2, that normally helps the skin calm inflammation after UV exposure. But when the skin gets too much ultraviolet radiation, this protective protein breaks down. Without it, inflammation rises sharply, making skin cells more likely to become cancerous over time.
The study found that when YTHDF2 levels fall, UV-damaged cells activate inflammatory pathways much more strongly. A small regulatory RNA — usually kept in check — begins interacting with immune sensors inside the cell and triggers more inflammation. Over time, this constant stress, DNA damage, and chronic inflammation create conditions that can lead to skin cancer.
These findings uncover a previously unknown defense system that helps skin recover safely from sun exposure. By understanding how this protection fails, researchers hope to create new ways to prevent or treat UV-related skin cancers. The study also reinforces the importance of limiting excessive sun exposure and protecting skin whenever possible.
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