Experimental mRNA therapy dramatically extends treatment window for acetaminophen overdose in preclinical models
Lipid nanoparticle delivery of mRNA encoding the SRXN1 protein reduced liver injury in mouse models of acetaminophen overdose and still worked when given six hours after overdose, whereas N-acetylcysteine gives complete protection at one hour, partial protection at two hours and none beyond that in mice. The work traces the effect to a newly identified SRXN1-USP7-HO-1 pathway that stabilizes the antioxidant-defense molecule HO-1. SRXN1 levels rose in liver samples from patients who died of acetaminophen overdose, and mice lacking the protein suffered worse injury.
Why it matters: It identifies a new liver-protection pathway and an mRNA therapy that extends the treatment window in mice.
