RSL3 inhibits keloid fibroblasts proliferation and migration by downregulation of glutathione peroxidase 4
摘要
Keloids are a skin fibrotic disease marked by extracellular matrix(ECM) deposition due to excessive fibroblast proliferation, yet the precise mechanism of their formation remains unclear. Consequently, treating keloids clinically proves to be very challenging. Lately, ferroptosis has been implicated in the etiopathogenesis of a variety of fibrotic diseases. Thus, induction of ferroptosis in keloid fibroblasts (KFs) has potential clinical significance in the treatment of keloids. As an inhibitor of glutathione peroxidase 4 (GPX4), RSL3 could bind to GPX4, and suppress GPX4 activity and trigger cells ferroptosis which maybe a novel approach for treating hyperproliferative diseases. Therefore, assessing the impact of RSL3 on keloid disease is currently very necessary. In our studies, we verified that RSL3 can inhibit the gene and protein expression of GPX4 in primary KFs, suppress the proliferation and migration of primary KFs, and reduce the formation of collagen in KFs. Furthermore, we provide the proof that RSL3 induces stagnation of KF migration and inhibits angiogenesis. Our findings suggest that RSL3 deserves systematic investigation as a potential therapeutic method for keloids.