Reprogramming the diseased liver: antioxidant-engineered mRNA nanoparticles as microenvironment modulators in MAFLD.

Metabolic dysfunction-associated fatty liver disease (MAFLD) is a leading cause of hepatocellular carcinoma (HCC), driven in part by oxidative stress-induced immune dysfunction that limits the efficacy of immunotherapy. In a recent study, Yu et al developed a vitamin E-incorporated lipid nanoparticle designed to enhance hepatocyte‑specific mRNA delivery while simultaneously buffering oxidative stress in the hepatic microenvironment. By restoring the activity of the redox‑sensitive phosphatase T‑cell protein tyrosine phosphatase and suppressing signal transducer and activator of transcription (STAT) signaling, this strategy improves metabolic homeostasis, reduces inflammatory signaling, and enhances responsiveness to immune checkpoint blockade. These findings illustrate how rational nanoparticle engineering can integrate therapeutic delivery with microenvironmental reprogramming in chronic metabolic disease.