REST is a transcription repressor that regulates the expression of thousands of genes, many of which are neuron-specific. While previously studied in stem cells and differentiating neurons, recent evidence highlights its role in adult neurons. REST levels decrease during neuronal differentiation, allowing the expression of specific neuronal phenotypes. REST-dependent genes encode important targets, including transcription factors, ion channels, and signaling proteins. REST also influences miRNAs and splicing factors, which are crucial for neuronal function. In adult neurons, REST levels vary, with increases observed during aging and under certain stimuli, which can repress neuron-specific genes. The role of REST in diseases such as Alzheimer's, Huntington's, and epilepsy is complex, with both protective and detrimental effects. REST's involvement in psychiatric and neurological disorders is well-documented, particularly in Alzheimer's and epilepsy. REST's dual role in gene repression and activation, along with its interactions with other transcription factors and chromatin remodeling complexes, contributes to its multifaceted impact on neuronal function and disease. REST's regulation of miRNAs and non-coding RNAs, as well as its influence on mRNA splicing, further underscores its importance in neuronal development and disease. The conflicting results regarding REST's role in physiology and pathology are attributed to its complex interactions with multiple gene targets and the diverse methods used in research. Overall, REST is a critical factor in various neurological conditions, and its role in disease mechanisms is an active area of investigation.REST is a transcription repressor that regulates the expression of thousands of genes, many of which are neuron-specific. While previously studied in stem cells and differentiating neurons, recent evidence highlights its role in adult neurons. REST levels decrease during neuronal differentiation, allowing the expression of specific neuronal phenotypes. REST-dependent genes encode important targets, including transcription factors, ion channels, and signaling proteins. REST also influences miRNAs and splicing factors, which are crucial for neuronal function. In adult neurons, REST levels vary, with increases observed during aging and under certain stimuli, which can repress neuron-specific genes. The role of REST in diseases such as Alzheimer's, Huntington's, and epilepsy is complex, with both protective and detrimental effects. REST's involvement in psychiatric and neurological disorders is well-documented, particularly in Alzheimer's and epilepsy. REST's dual role in gene repression and activation, along with its interactions with other transcription factors and chromatin remodeling complexes, contributes to its multifaceted impact on neuronal function and disease. REST's regulation of miRNAs and non-coding RNAs, as well as its influence on mRNA splicing, further underscores its importance in neuronal development and disease. The conflicting results regarding REST's role in physiology and pathology are attributed to its complex interactions with multiple gene targets and the diverse methods used in research. Overall, REST is a critical factor in various neurological conditions, and its role in disease mechanisms is an active area of investigation.