Autophagy, mitochondria, and oxidative stress are interconnected processes that influence cellular responses and disease progression. Autophagy, a cellular degradation process, plays a key role in maintaining mitochondrial function and redox balance. It is regulated by a complex network of proteins, including Atg proteins and lysosomal hydrolases, and is essential for mitochondrial turnover. Autophagy can be triggered by various stressors, including oxidative stress, and is involved in the clearance of damaged proteins and organelles. Oxidative stress, caused by reactive oxygen species (ROS) and reactive nitrogen species (RNS), can lead to mitochondrial dysfunction and cellular damage. Mitophagy, a form of autophagy specifically targeting damaged mitochondria, is crucial for maintaining mitochondrial health. Dysregulation of autophagy or mitochondrial function can contribute to neurodegenerative diseases, such as Parkinson's and Alzheimer's, where oxidative and nitrative stress are prevalent. ROS and RNS can modulate autophagy through various mechanisms, including redox modifications of key proteins like Atg4 and IKKβ. These modifications can either activate or inhibit autophagy, depending on the cellular context. Additionally, autophagy can influence oxidative stress by degrading damaged proteins and organelles, thereby reducing the production of reactive species. The interplay between autophagy, mitochondrial function, and redox signaling is complex and involves multiple pathways. For example, the Nrf2 pathway, a key redox sensor, regulates the expression of genes involved in antioxidant defense and autophagy. Similarly, p53 and FOXO3 are transcription factors that regulate autophagy in response to oxidative stress. In diseases such as neurodegeneration, impaired autophagy and mitochondrial dysfunction can lead to the accumulation of toxic proteins and oxidative damage. Understanding the mechanisms by which autophagy and mitochondrial function are regulated by redox signaling is essential for developing therapeutic strategies to combat oxidative and nitrative stress in disease.Autophagy, mitochondria, and oxidative stress are interconnected processes that influence cellular responses and disease progression. Autophagy, a cellular degradation process, plays a key role in maintaining mitochondrial function and redox balance. It is regulated by a complex network of proteins, including Atg proteins and lysosomal hydrolases, and is essential for mitochondrial turnover. Autophagy can be triggered by various stressors, including oxidative stress, and is involved in the clearance of damaged proteins and organelles. Oxidative stress, caused by reactive oxygen species (ROS) and reactive nitrogen species (RNS), can lead to mitochondrial dysfunction and cellular damage. Mitophagy, a form of autophagy specifically targeting damaged mitochondria, is crucial for maintaining mitochondrial health. Dysregulation of autophagy or mitochondrial function can contribute to neurodegenerative diseases, such as Parkinson's and Alzheimer's, where oxidative and nitrative stress are prevalent. ROS and RNS can modulate autophagy through various mechanisms, including redox modifications of key proteins like Atg4 and IKKβ. These modifications can either activate or inhibit autophagy, depending on the cellular context. Additionally, autophagy can influence oxidative stress by degrading damaged proteins and organelles, thereby reducing the production of reactive species. The interplay between autophagy, mitochondrial function, and redox signaling is complex and involves multiple pathways. For example, the Nrf2 pathway, a key redox sensor, regulates the expression of genes involved in antioxidant defense and autophagy. Similarly, p53 and FOXO3 are transcription factors that regulate autophagy in response to oxidative stress. In diseases such as neurodegeneration, impaired autophagy and mitochondrial dysfunction can lead to the accumulation of toxic proteins and oxidative damage. Understanding the mechanisms by which autophagy and mitochondrial function are regulated by redox signaling is essential for developing therapeutic strategies to combat oxidative and nitrative stress in disease.