Photomicrographs of rat livers. The livers were sectioned at 5-μm thickness and the sections were stained with Masson’s trichrome. A: Normal group. B: TAA group. C: PLP group. Extended collagen deposition and large septa of the hepatic lobules are observed in the TAA-treated liver (B) compared with the normal liver (A). In addition, lymphoid infiltration is observed around the central and portal veins in the TAA-treated liver. PLP treatment markedly reduces the severity of the fibrosis and inflammation induced by TAA (C).