[The long progress of neurohypophyseal peptides]

Area of Science:

• Comparative endocrinology
• Evolutionary biology
• Neuroscience

Context:

• Neurohypophyseal peptides, including vasopressin (antidiuretic hormone) and oxytocin, are ancient molecules found throughout the animal kingdom, from unicellular organisms to mammals.
• These peptides exhibit distinct evolutionary pathways, with basic vasopressin-related peptides and neutral oxytocin-related peptides diverging in function.
• Their presence and distribution vary significantly across species, highlighting diverse evolutionary adaptations.

Purpose:

• To explore the phylogenetic evolution and conserved functions of vasopressin and oxytocin.
• To differentiate the roles of basic (vasopressin-like) and neutral (oxytocin-like) peptides in physiological and behavioral processes.
• To establish a framework for understanding how disruptions in these neuropeptide systems may relate to neuropsychiatric disorders.

Summary:

• Vasopressin-related peptides primarily regulate water metabolism and central nervous system functions crucial for survival, such as alertness and memory.
• Oxytocin-related peptides are predominantly involved in reproductive functions, including sperm transport, parturition, and milk ejection.
• Both peptide families play significant roles in social behaviors, promoting maternal care and social bonding across various species.

Impact:

• Understanding the evolutionary trajectory and functional divergence of neurohypophyseal peptides provides insights into the biological underpinnings of essential physiological and behavioral processes.
• This research offers a potential etiological basis for neuropsychiatric disturbances linked to imbalances in central vasopressin and oxytocin production.
• The findings contribute to a broader comprehension of neuropeptide function in health and disease, with implications for comparative and evolutionary biology.