Potential effects of transforming growth factor β1 and interleukin-6 at the early stage of liver regeneration. The initial action of platelet TGF-β1 is the induction of the expression of the IL-6 gene by LSEC, probably through the canonical small mothers against decapentaplegic SMAD transcription factor complex. IL-6 promotes hepatocyte proliferation. Additionally, platelets TGF-β1 is connected to inflammation through its effects on hepatic stellate cells (HSC) (cell activation) and on Kuppfer cells (KC) (M2 polarization). HGF: hepatocyte growth factor, HSC: hepatic stellate cells, IL-6: interleukin-6, LSEC: liver sinusoidal endothelial cells, TGF- β1: transforming growth factor β1.