Abstract
Abietic acid has been known to exhibit anti-inflammatory activity. This study was designed to investigate the protective effects of abietic acid on acetaminophen (APAP)-induced liver injury. The data demonstrated that abietic acid significantly ameliorated APAP-induced liver pathological changes, TNF-α and IL-1β production. APAP could increase malondialdehyde (MDA) and Fe2+ levels, and decrease ATP and glutathione (GSH) levels, as well as glutathione peroxidase 4 (GPX4) and xCT expression. However, these changes induced by APAP were prevented by abietic acid, indicating abietic acid could inhibit APAP-induced ferroptosis. Furthermore, abietic acid inhibited APAP-induced NF-κB activation and increased the expression of Nrf2 and HO-1. Additionally, the inhibitory effects of abietic acid on APAP-induced liver injury were prevented in Nrf2-/- mice. In vitro, the inhibition of abietic acid on APAP-induced inflammation and ferroptosis were reversed when Nrf2 was knockdown. In summary, abietic acidexhibited a therapeutic effectagainst liver injury by attenuating inflammation and ferroptosis.
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