| خلاصه مقاله | Background Colorectal cancer (CRC) remains a formidable health burden challenge worldwide, with drug resistance complicating treatment. Combination therapies with natural compounds that can potentiate the anti-cancer effects of chemotherapeutics agents and overcome resistance mechanisms represent a promising therapeutic strategy. This study explores the potential of linarin, a plant-derived flavonoid, to enhance 5-fluorouracil (5-Fu) efficacy in CRC cells.
Methods Using SW480 cells, we investigated the combined effects of linarin and 5-Fu on cell viability, apoptosis, and migration. Molecular mechanisms were probed via qPCR and Western blotting, focusing on the PI3K/AKT/FOXO3a pathway. We established 5-Fu-resistant cells to evaluate resistance reversal. In vivo studies utilized a DMH-induced rat model. Pharmacokinetic interactions were assessed in rats.
Results Our findings revealed synergistic cytotoxicity between linarin and 5-Fu, with enhanced apoptosis and reduced migration. Mechanistically, the combination modulated the PI3K/AKT/FOXO3a pathway more effectively than either agent alone. Both linarin and 5-Fu independently inhibit the phosphorylation of Akt, leading to the activation of the pro-apoptotic transcription factor FOXO3a and the subsequent upregulation of Bax while downregulating Bcl-2. Linarin partially reversed 5-Fu resistance in SW480-5FuR cells. In vivo, the combination significantly reduced tumor burden without apparent toxicity. Pharmacokinetic studies showed mutual influences, potentially contributing to enhanced efficacy.
Conclusion These findings highlight linarin's potential as an adjuvant to 5-Fu, offering a novel approach to improving CRC treatment outcomes. The unique synergistic mechanism via PI3K/AKT/FOXO3a modulation offers insights warranting further clinical investigation. |