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lüll The physiological implication of novel proteins in systemic osmoregulation Sinke AP; Deen PMFASEB J 2011[Oct]; 25 (10): 3279-89Maintenance of the osmobalance is important for life. In this process, in which brain and kidney act in concert, mammals have to cope with significant deviations as drinking water reduces plasma osmolality, whereas salty food increases it. To restore homeostasis, specialized nuclei within the hypothalamus play a pivotal role in detecting changes in plasma osmolality and initiating appropriate responses. These responses are accomplished by either changing the intake of water or the excretion of water by the kidney. In the past decade, several novel findings have made significant contributions to our insights in the process of systemic osmoregulation. Novel proteins have been identified in the brain as well as in the kidney that are fulfilling important roles in the process of systemic osmoregulation. In this review, recent evidence of the involvement of TRPV channels (TRPV1, TRPV2, and TRPV4) and proteins, such as sodium channels NALCN and Na(x), in neuronal osmoregulation, as well as; e.g., the purinergic P2Y2 receptor in renal osmoregulation, are discussed, and integrated with existing knowledge of systemic osmoregulation.|Animals[MESH]|Brain/physiology[MESH]|Humans[MESH]|Kidney/physiology[MESH]|Receptors, Purinergic P2Y2/*physiology[MESH]|Sodium Channels/*physiology[MESH]|TRPV Cation Channels/*physiology[MESH]|Water-Electrolyte Balance/*physiology[MESH] |