UCN3, also known as Urocortin 3, is a peptide hormone belonging to the corticotropin-releasing factor (CRF) family. It is primarily expressed in the central nervous system, particularly in regions of the brain involved in stress response regulation, such as the hypothalamus, amygdala, and brainstem. One of the primary functions of UCN3 is its role in modulating the stress response and anxiety-related behaviors. Like other members of the CRF family, UCN3 acts as a neuromodulator, influencing the activity of neurons and circuits involved in the physiological and behavioral responses to stress. UCN3 binds to and activates specific receptors, including CRF receptor type...