Saeed M. Alqahtani; Amal F. Dawood; Samaa S. Kamar; Mohamed A. Haidara; Asmaa M. ShamsEldeen; Mohammad Dallak; Bahjat Al-Ani & Hasnaa A. Ebrahim

Paracetamol (known as acetaminophen, or APAP) poisoning causes acute liver damage that can lead to organ failure and death. We sought to determine that APAP overdose can augment tumor necrosis factor-alpha (TNF-α)/ nuclear factor kappa B (NF-kB)/induced nitic oxide synthase (iNOS) axis-mediated hepatotoxicity in rats, and the anti-inflammatory polyphenolic compounds, quercetin (QUR) plus resveratrol (RES) can ameliorate these parameters. Therefore, we induced acute hepatotoxicity in rats using APAP overdose (2 g/kg, orally) and the protective group of rats were treated with 50 mg/kg QUR plus 30 mg/kg RES for one week before APAP ingestion. Animals were killed at day 8. APAP poisoning caused the induction of hepatic tissue levels of TNF-α, NF-kB, and iNOS, which were significantly (p<0.05) decreased by QUR+RES. QUR+RES, also inhibited liver injury biomarkers, alanine aminotransferase (ALT) and aspartate aminotransferase (AST). Additionally, a link between liver injury and TNF-α /NF-kB / iNOS axis mediated hepatotoxicity was observed. Thus, the presented data backing the conclusion that intoxication by paracetamol increases TNF-α / NF-kB / iNOS axis -mediated hepatotoxicity, and is protected by a combination of quercetin and resveratrol.

KEY WORDS: Acute hepatic injury; Paracetamol overdose; TNF-α /NF-kB / iNOS axis; Quercetin; Resveratrol.

ALQAHTANI, S. M.; DAWOOD, A. F.; KAMAR, S. S.; HAIDARA, M. A.; SHAMSELDEEN, A M.; DALLAK, M.; AL-ANI, B. & EBRAHIM, H. A. Quercetin and resveratrol are associated with the downregulation of TNF-α/NF-kB/iNOS axis-mediated acute liver injury in rats induced by paracetamol poisoning. Int. J. Morphol., 41(1):79-84, 2023.