Iron-Sulfur Clusters and Cancer

Iron-sulfur (Fe-S) clusters are essential protein cofactors involved in various cellular processes.Defects in Fe-S cluster biogenesis can lead to diseases like cancer.The stability and transfer of Fe-S clusters mediated by proteins like NAF-1 regulate cellular resistance to oxidative stress.This study examined how modulating NAF-1 and Fe-S cluster stability affected breast cancer tumor growth in MDA-MB-231 cells.Overexpression of NAF-1 enhanced antioxidant capacity and oxidative stress resistance, increasing tumor volume 3-fold.In contrast, a stabilizing mutation in NAF-1 inhibited cluster transfer to recipient proteins, decreasing antioxidant capacity and reducing tumor volume by 30%.The drug pioglitazone had similar effects to the NAF-1 mutation, hyperstabilizing its Fe-S cluster and suppressing its function.High cancer cell metabolism produces reactive oxygen species that are normally detoxified.New cancer therapies exploit this by overloading cells with oxidative radicals using iron nano-catalysts.Thus, understanding factors regulating Fe-S cluster stability in cancer cells provides opportunities to enhance pro-oxidant cancer therapies.Overall, this study demonstrated that increased Fe-S cluster stability reduces NAF-1 mediated antioxidant capacity and cancer cell growth, while destabilization enhances sensitivity to oxidative stress.Modulating proteins involved in Fe-S cluster transfer represents a potential therapeutic approach for cancer treatment.