mRNA levels of the components of the TGF-β–Smad–ZEB signal pathway in HSC-T6 cells. The mRNA levels of TGF-β, Smad2/3/4, and ZEB were significantly upregulated, while Smad7 mRNA levels were significantly downregulated. The mRNA levels of Smad7 in the NR4A1 activation group were significantly upregulated, while those of TGF-β, Smad2/3/4, and ZEB were significantly downregulated. *P < 0.05, **P < 0.01 vs control, #
P < 0.05, ##
P < 0.01 vs acetaldehyde. n = 3/group.