Vasoactive Intestinal Peptide (VIP) is an endogenous neuropeptide consisting of 28 amino acids and is widely examined in scientific research for its involvement in smooth muscle relaxation, vasodilation, and neuroendocrine signaling pathways. Within experimental models, VIP is explored for its influence on inflammatory modulation, circadian rhythm regulation, and intercellular communication across the nervous and immune systems. Due to its diverse biological functions, VIP remains a key focus of in vitro research investigating neuroprotective mechanisms, metabolic processes, and the maintenance of physiological homeostasis.
