ArticleJournal of biochemical and molecular toxicology2026
Regulation of Endoplasmic Reticulum Stress Suppresses Early Pro-Tumorigenic Events During N-Nitrosodiethylamine-Induced Hepatocarcinogenesis.
Article in Journal of biochemical and molecular toxicology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Carcinogenesis is a dynamic, multistep process in which the initiation stage represents a critical and irreversible event that determines cellular fate. Although genetic alterations play a central role in tumor development, dysregulation of intracellular organelles such as the endoplasmic reticulum (ER) has emerged as an important contributor to cancer initiation. In the present study, we aimed to evaluate how modulation of ER stress affects the initiation phase of hepatocarcinogenesis. The initiation-stage hepatocarcinogenic model was developed by administering a single dose of N-nitrosodiethylamine (NDEA) (50 mg/kg b.w, i.p.) to male Wistar rats. To modulate ER activity, the endogenous chaperone inducer 1-(3,4-dihydroxyphenyl)-2-thiocyanatoethanone (BIX) was administered intraperitoneally (0.1 mg/kg body weight) for 2 weeks prior to NDEA treatment. The effect of ER modulation on pro-tumorigenic events was assessed in terms of oxidative DNA damage, expression of inflammatory cytokines, p53, and cellular proliferation. Modulation of UPR by BIX was evaluated based on expression levels of PERK, ATF6, CHOP, and p-PERK/PERK ratio. BIX treatment demonstrated marked attenuation of pro-tumorigenic events as evidenced by significantly decreased levels of 8-OHdG, TNF-α, IL-6, PCNA, and p53, which were upregulated in the NDEA-treated group. Histopathological analysis further confirmed the preservation of hepatic architecture in the BIX-treated group as compared with the NDEA group. In addition, significantly decreased expression of UPR markers in the BIX-treated group, as compared to the NDEA group, confirmed inhibition of UPR activation. Collectively, these findings demonstrated that BIX-mediated ER-stress modulation effectively inhibited the initiation of NDEA-induced hepatocarcinogenesis.
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