Atrial Natriuretic Factor Inhibits Vasopressin-stimulated Osmotic Water Permeability in Rat Inner Medullary Collecting Duct
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The inner medullary collecting duct (IMCD) has been proposed to be a site of atrial natriuretic factor (ANF) action. We carried out experiments in isolated perfused terminal IMCDs to determine whether ANF (rat ANF 1-28) affects either osmotic water permeability (Pf) or urea permeability. In the presence of a submaximally stimulating concentration of vasopressin (10(-11) M), ANF (100 nM) significantly reduced Pf by an average of 46%. Lower concentrations of ANF also significantly inhibited vasopressin-stimulated Pf by the following percentages: 0.01 nM ANF, 18%; 0.1 nM, 46%; 1 nM, 48%. Addition of exogenous cyclic GMP (0.1 mM) mimicked the effect of ANF, decreasing Pf by an average of 48%. ANF also inhibited cyclic AMP-stimulated Pf by an average of 31%. ANF did not affect urea permeability, nor did it alter vasopressin-stimulated cyclic AMP accumulation. We conclude that ANF at physiological concentrations causes a large inhibition of vasopressin-stimulated Pf in the rat terminal IMCD, and that cyclic GMP is the second messenger mediating the effect. ANF appears to act at a site distal to cyclic AMP generation in the chain of events linking vasopressin receptor binding to an increase in osmotic water permeability.
Chen Y, Burnett J Int J Mol Sci. 2018; 19(4).
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Hanna-Mitchell A, Robinson D, Cardozo L, Everaert K, Petkov G Neurourol Urodyn. 2016; 35(2):299-303.
PMID: 26872571 PMC: 6103166. DOI: 10.1002/nau.22809.
Nonoguchi H, Izumi Y, Nakayama Y, Matsuzaki T, Yasuoka Y, Inoue T PLoS One. 2013; 8(12):e83146.
PMID: 24376658 PMC: 3871552. DOI: 10.1371/journal.pone.0083146.
Cipriani P, Kim S, Klein J, Sim J, von Bergen T, Blount M Front Physiol. 2012; 3:176.
PMID: 22685437 PMC: 3368392. DOI: 10.3389/fphys.2012.00176.
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Polzin D, Kaminski H, Kastner C, Wang W, Kramer S, Gambaryan S Kidney Int. 2010; 78(7):650-9.
PMID: 20613715 PMC: 4433746. DOI: 10.1038/ki.2010.197.