Tannic acid attenuates hepatic oxidative stress, apoptosis and inflammation by activating the Keap1 ‑Nrf2/ARE signaling pathway in arsenic trioxide‑toxicated rats.

Tannic acid attenuates hepatic oxidative stress, apoptosis and inflammation by activating the Keap1‑Nrf2/ARE signaling pathway in arsenic trioxide‑toxicated rats. Oncol Rep. 2020 Nov;44(5):2306-2316 Authors: Li M, Liu P, Xue Y, Liang Y, Shi J, Han X, Zhang J, Chu X, Chu L Abstract The present study was performed to investigate the protective effects of tannic acid (TA) on liver injury induced by arsenic trioxide (ATO) and to elucidate the mechanism involved as related to the Kelch‑like ECH‑associated protein 1 (Keap1)‑nuclear factor erythroid 2‑related factor 2 (Nrf2)/antioxidant response element (ARE) signaling pathway. Adult rats were intraperitoneally injected with TA, while ATO was administered 1 h later. On the 11th day, the rats were euthanized to determine any liver histological changes, liver function, and the activities of antioxidant, antiapoptosis and proinflammatory cytokines in the liver. Furthermore, the protein expression levels of nuclear Nrf2, total Nrf2, Keap1, Heme oxygenase‑1 (HO‑1), NADPH quinine oxidoreductase‑1 (NQO1), and γ‑glutamylcysteine synthetase (γ‑GCS) were determined using western blot analysis. The results showed that TA treatment ameliorated ATO‑induced liver histological changes and decreased the ATO‑induced increased alanine aminotransferase (ALT) and aspartate transaminase (AST) serum levels. Activities of the antioxidant enzymes significantly were increased, while th...
Source: Oncology Reports - Category: Cancer & Oncology Tags: Oncol Rep Source Type: research