Water metabolism regulation

Water metabolism regulation refers broadly to the physiological maintenance of water balance within the body, ensuring appropriate distribution between fluid compartments and the stability of plasma osmolality. Key molecular players include aquaporin channels that facilitate passive water transport across cell membranes, and endocrine signals—primarily arginine vasopressin acting at its V2 receptor, which controls renal water reabsorption via regulated insertion of aquaporin-2. The process is closely linked to sodium and electrolyte metabolism and regulated by the kidneys, the hypothalamic thirst center, and hormonal feedback loops. Defects in water metabolism regulation result in disorders such as diabetes insipidus, SIADH, dehydration, and fluid overload, and are frequently monitored using markers like plasma osmolality or aquaporin-2 urine levels[1][2][4][6].

Other names

water homeostasisbody water regulationfluid balancewater balance

Agonists/antagonists at vasopressin V2 receptor (modulate aquaporin-2 translocation and renal water reabsorption); Modulation of aquaporin channel expression or function; Changes in renal handling of water via diuretic action