Orphan nuclear receptor NR4A1 reg…naling and fibrosis.

Researchers identified NR4A1, a protein that acts as a natural brake on TGF-β (a growth factor that can cause excess collagen buildup and scarring). When they used small-molecule compounds to activate NR4A1 in mice, it successfully reduced fibrosis in skin, lungs, liver, and kidneys—suggesting a potential new approach to prevent unwanted scarring and tissue damage.