RT info:eu-repo/semantics/article
T1 Hepatic Nrf2 expression is altered by quercetin supplementation in X-irradiated rats
A1 Marina Hernández, Raquel
A1 González Sevilla, María Francisca
A1 Ferreras Estrada, María Del Carmen
A1 Costilla García, Serafín Marcos
A1 Barrio Lera, Juan Pablo
A2 Sanidad Animal
K1 Sanidad animal
K1 Ratas
K1 Quercetina
K1 Rayos X
K1 Radiación
K1 2401.11 Patología Animal
AB Whole‑body irradiation has been associated with liver function alterations. Ionizing radiation exposure increases oxidative stress and antioxidants can activate transcription of antioxidant target genes. In the present study, modifications of the liver antioxidant system were evaluated at 7 and 30 days following sub‑lethal whole‑body X‑irradiation in male Wistar rats, which were intragastrically supplemented with quercetin or control solvent for 4 days prior to and 6 days following irradiation. Animal groups were as follows: CS, control, solvent‑supplemented; CQ, control, quercetin‑supplemented; RS, irradiated, solvent‑supplemented; and RQ, irradiated, quercetin‑supplemented. After 7 days, liver tissue from RS animals demonstrated marked hydropic panlobular degeneration with Mallory bodies in ballooning hepatocytes. These changes were mostly reversed in RQ rats. Lipid peroxidation in addition to copper/zinc superoxide dismutase (Cu/Zn‑SOD), nuclear factor (erythroid‑derived 2)‑like 2 (Nrf2) and Kelch‑like ECH‑associated protein 1 (Keap1) protein expression levels were all increased by X‑irradiation, but significantly decreased by quercetin supplementation. Catalase (CAT) and NAD(P)H: quinone oxidoreductase 1 (NQO1) expression levels remained high in irradiated rats regardless of quercetin supplementation. After 30 days, the liver from RS animals had small portal infiltrates and diffuse cytoplasmic vacuolization, with reduced lipid peroxidation and reduced expression levels of CAT, NQO1, Nrf2 and Keap1, but consistently elevated Cu/Zn‑SOD expression. RQ animals indicated reduced expression levels of Nrf2 and Keap1 30 days after irradiation. The present study demonstrated a quercetin‑induced reduction of the oxidative stress‑associated increase in Nrf2 expression that may be useful for preventing cancer cell survival in response to ionizing radiation exposure.
PB Spandidos Publications
SN 1791-2997
LK http://hdl.handle.net/10612/12363
UL http://hdl.handle.net/10612/12363
NO P. 539-546
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 24-abr-2024