PPARG and metabolic dysfunction-associated steatotic liver disease: However, PPAR-γ is also expressed in non-parenchymal cells such as Kupffer and stellate cells, and parenchymal cell expression is induced in NAFLD (Boelsterli and Bedoucha, 2002; Westerbacka et al., 2007; Pettinelli and Videla, 2011).