Opioid receptor-like 1 stimulation in the collecting duct induces aquaresis through vasopressin-independent aquaporin-2 downregulation.
Opioid receptor-like 1 stimulation in the collecting duct induces aquaresis through vasopressin-independent aquaporin-2 downregulation.
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集合管中的类阿片受体 1 刺激通过不依赖加压素的水通道蛋白 2 下调诱导水渗出。
DOI:
10.1152/ajprenal.00329.2003
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发表时间:
2004
期刊:
影响因子:
--
通讯作者:
T. Jonassen
中科院分区:
文献类型:
--
作者:
N. Hadrup;J. Petersen;J. Praetorius;E. Meier;M. Graebe;L. Brønd;D. Staahltoft;S. Nielsen;S. Christensen;D. Kapusta;T. Jonassen
Nociceptin, the endogenous ligand of the inhibitory G protein-coupled opioid receptor-like 1 receptor, produces aquaresis (i.e., increases the excretion of solute-free urine) in rats. However, the mechanism underlying this effect has not yet been explained. Using immunohistochemistry, we found the opioid receptor-like 1 receptor in the rat kidney colocalized with the vasopressin-regulated water channel aquaporin-2 in inner medullary collecting ducts. We investigated the aquaretic effect of opioid receptor-like 1 receptor stimulation by infusing the selective nociceptin analog ZP120C; volume depletion was prevented by computer-driven, servo-controlled intravenous volume replacement with 50 mM glucose. ZP120C induced a marked and sustained aquaresis in normal and congestive heart failure rats in the absence of changes in vasopressin plasma concentrations. The ZP120C-induced aquaresis was associated with downregulation of the aquaporin-2 protein level in both rat groups, suggesting that opioid receptor-like 1 receptor stimulation produces aquaresis by inhibiting the vasopressin type-2 receptor-mediated stimulation on collecting duct water reabsorption. However, substantial amounts of PKA-mediated serine 256 phosphorylated aquaporin-2 were still present after 4 h of ZP120C treatment. Furthermore, neither preincubation with nociceptin nor ZP120C inhibited vasopressin-mediated cAMP accumulation in isolated collecting ducts. We conclude that renal opioid receptor-like 1 receptor stimulation in normal and congestive heart failure rats produces aquaresis by a direct renal effect, via aquaporin-2 downregulation, through a mechanism not involving inhibition of vasopressin type-2 receptor-mediated cAMP production.
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DOI:
--
发表时间:
1999-09
期刊:
Journal of the American Society of Nephrology : JASN
影响因子:
--
作者:
P. Fernández-Llama;R. Turner;G. Dibona;M. Knepper
通讯作者:
P. Fernández-Llama;R. Turner;G. Dibona;M. Knepper
DOI:
--
发表时间:
1999
期刊:
The Journal of pharmacology and experimental therapeutics
影响因子:
--
作者:
Kapusta,DR;Chang,JK;Kenigs,VA
通讯作者:
Kenigs,VA
DOI:
10.1152/ajpcell.1996.270.6.c1695
发表时间:
1996-06-01
影响因子:
5.5
作者:
Hozawa, S;Holtzman, EJ;Ausiello, DA
通讯作者:
Ausiello, DA
DOI:
10.1681/asn.v8115
发表时间:
1997
期刊:
Journal of the American Society of Nephrology : JASN
影响因子:
--
作者:
Apostol,E;Ecelbarger,CA;Terris,J;Bradford,AD;Andrews,P;Knepper,MA
通讯作者:
Knepper,MA