Hydrogen sulfide alleviates beryllium sulfate-induced ferroptosis and ferritinophagy in 16HBE cells.

Beryllium sulfate (BeSO ) can result to lung injuries, such as leading to lipid peroxidation and autophagy, and the treatment of beryllium disease has not been well improved. Ferroptosis is a regulated cell death process driven by iron-dependent and lipid peroxidation, while ferritinophagy is a process mediated by nuclear receptor coactivator 4 (NCOA4), combined with ferritin heavy chain 1 (FTH1) degradation and release Fe , which regulated intracellular iron metabolism and ferroptosis. Hydrogen sulfide (H S) has the effects of antioxidant, antiautophagy, and antiferroptosis. This study aimed to investigate the effect of H S on BeSO -induced ferroptosis and ferritinophagy in 16HBE cells and the underlying mechanism. In this study, BeSO -induced 16HBE cell injury model was established based on cellular level and pretreated with deferoxamine (DFO, a ferroptosis inhibitor), sodium hydrosulfide (NaHS, a H S donor), or NCOA4 siRNA and, subsequently, performed to detect the levels of lipid peroxidation and Fe and the biomarkers of ferroptosis and ferritinophagy. More importantly, our research found that DFO, NaHS, or NCOA4 siRNA alleviated BeSO -induced ferroptosis and ferritinophagy by decreasing the accumulation of Fe and lipid peroxides. Furthermore, the relationship between ferroptosis, ferritinophagy, H S, and beryllium disease is not well defined; therefore, our research is innovative. Overall, our results provided a new theoretical basis for the prevention and treatment of beryllium disease and suggested that the application of H S, blocking ferroptosis, and ferritinophagy may be a potential therapeutic direction for the prevention and treatment of beryllium disease.