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    Nobiletin reduces 5-FU-induced lung injury with antioxidative, anti-inflammatory and anti-apoptotic activities
    (Springer, 2025) Uslu, Gozde Atila; Uslu, Hamit; Coban, Taha Abdulkadir; Ozkaraca, Mustafa; Mendil, Ali Sefa; Aygormez, Serpil
    Like other chemotherapeutic agents, 5-fluorouracil (5-FU) targets cancerous cells, but it also causes many unwanted side effects on healthy tissues and cells. Based on the undesirable effects of 5-FU, the aim of this study was to determine how 5-FU affects lung tissue and whether nobiletin has any protective effect. The study consisted of negative control, Nobiletin, 5-FU and Nobiletin + 5-FU groups. Nobiletin and Nobiletin + 5-FU groups received 10 mg/kg Nobiletin i.g. for 7 days. On day 8, 100 mg/kg 5-FU was administered i.p. to 5-FU and Nobiletin + 5-FU groups. Biochemical and immunohistochemical analyses were performed on the lung tissues dissected at the end of the study. 5-FU caused growth retardation, disturbed the oxidant-antioxidant balance by increasing MDA levels and decreasing GSH levels, triggered cellular apoptosis by increasing Bax and caspase-3 levels and decreasing Bcl-2, also increased lung tissue inflammation and damage by increasing NF kappa B and IL-1 beta levels. However, it was determined that Nobiletin prevented the disruption of the oxidant-antioxidant balance, showed significant anti-apoptotic effects, especially by reducing Bax levels and partially modulating caspase-3 and Bcl-2 levels, and also exhibited anti-inflammatory effects by reducing NF kappa B and IL-1 beta levels and supported the normal development of animals. Our results showed that nobiletin pretreatment showed anti-inflammatory activity by inhibiting the NF kappa B pathway in 5-FU-induced lung injury, suppressed oxidative stress with its antioxidant activity and was effective in modulating cellular apoptosis with its anti-apoptotic activity. In conclusion, Nobiletin has been shown to have an important potential in reducing fluorouracil-induced tissue damage by acting through multiple pathways.