Ferroptosis and aging: Inducing and catalyzing neurodegenerative diseases.

Ferroptosis is a newly recognized form of programmed cell death characterized by iron overload-dependent lipid peroxidation. These pathological phenomena are often observed in neurodegenerative diseases. Aging is an irreversible process characterized by the deterioration of tissue and cell function. It has been shown to contribute to neurodegenerative diseases and increase susceptibility to ferroptosis. Therefore, ferroptosis may be involved in the progression of neurodegenerative diseases as a pathogenic factor, and aging is the common catalyst of both processes. The purpose of this review is to elucidate the latest progress on the mechanisms related to ferroptosis in neurodegenerative diseases, including iron overload, lipid peroxidation, antioxidant defense, cell membrane repair, and the regulation of autophagy and transcription factors. We also explored the relationship between ferroptosis and aging and reported that aging can induce ferroptosis by increasing iron overload, enhancing lipid peroxidation, and exacerbating autophagy disorders. Since ferroptosis is a pathogenic factor in neurodegenerative diseases, we screened gene bank databases and found that many genes associated with ferroptosis and neurodegenerative diseases overlap. Additionally, genes related to both the peroxidation pathway and ferroptosis are enriched. Ferroptosis occurs under conditions of age-related iron accumulation and lipid enrichment, as well as due to disorders in autophagy levels and transcription factors. Furthermore, in various neurodegenerative diseases, specific pathological changes or products can also contribute to the occurrence of ferroptosis. Finally, based on animal studies and clinical trials involving ferroptosis inhibitors, physical therapies, stem cell treatments, and exosome therapies in neurodegenerative diseases, it has been found that inhibiting ferroptosis can effectively reverse neurological dysfunction and cognitive impairment associated with these conditions. However, given various limitations, the conclusions of some animal studies and clinical trials have not been ideal, indicating that further large-scale research is necessary. Taken together, ferroptosis induces aging-related neurodegenerative diseases and neuronal cell death, triggering disease onset and progression. Ferroptosis inhibitors, physical therapies, stem cell treatments, and exosome therapies show great potential for inhibiting ferroptosis in neurodegenerative disease.