From the ashes of a failed pain drug, a new therapeutic path emerges

A surprising discovery about a failed pain drug -- and specifically, the pathway it targets, BH4 -- could have implications for autoimmunity and cancer. Neuroscientists report that BH4 also functions as a kind of immunological thermostat, raising and lowering the activity levels of T cells. Inhibiting BH4 could relieve atopic dermatitis, psoriasis, lupus, polyarthritis and inflammatory bowel disease; boosting it could help the immune system attack cancers.

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