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The purpose of this study was to investigate the effect of combined therapy of diacerein and gold nanoparticles (AuNP) on diethylnitrosamine (DEN) induced hepatocellular carcinoma (HCC) in a rat model. Normal healthy and DEN-induced (HCC) rats were divided into five groups. Group I healthy rats served as normal control, Group II untreated HCC rats, Group III HCC rats administered diacerein, Group IV HCC rats administered AuNP, and Group V HCC rats administered diacerein and AuNP. All treatments were given once daily for 4 weeks. Liver morphology and necroinflammation in all groups were evaluated using hematoxylin and eosin (H&amp;E), Masson’s trichrome for fibrosis, and immunohistochemistry assays for expression of TNF-α, IL-6, β-catenin, and caspase-3. Liver sections from Group II HCC rats showed loss of lobular architecture, thick fibrous tissue deposition, leukocyte infiltration, degenerated hepatocytes and HCC neoplastic nodules surrounded by extensive fibrosis. Group II had high expression of TNF-α, IL-6, and β-catenin, and low caspase-3 expression as compared to Group I. HCC rats treated with the combined therapy of diacerein and AuNP (Group V) showed markedly decreased HCC lesions, significant necroinflammation reduction (p ˂ 0.05) and 90% reduction in fibrosis as compared to Group II HCC + diacerein. This combined therapy also reduced (p ˂ 0.05) TNF-α, IL-6, β-catenin expression and increased caspase-3 expression. In conclusion, diacerein combined with AuNP synergistically attenuated the severity of HCC lesions by reducing necroinflammation and fibrosis, decreased TNF-α, IL-6, β-catenin expression, and increased caspase-3 expression for apoptosis.

journal of histotechnology

Attenuation of diethylnitrosamine-induced hepatocellular carcinoma in a rat model by combination therapy of diacerein and gold nanoparticles: a histopathological and immunohistochemical study