Expression of aquaporin-4 water channels in rat cholangiocytes
نویسندگان
چکیده
منابع مشابه
Secretin induces the apical insertion of aquaporin-1 water channels in rat cholangiocytes.
Aquaporin-1 (AQP1) water channels are present in the apical and basolateral plasma membrane domains of bile duct epithelial cells, or cholangiocytes, and mediate the transport of water in these cells. We previously reported that secretin, a hormone known to stimulate ductal bile secretion, increases cholangiocyte osmotic water permeability and stimulates the redistribution of AQP1 from an intra...
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In order to gain insight into the molecular mechanisms that allow taste cells to respond to changes in their osmotic environment, we have used primarily immunocytochemical and molecular approaches to look for evidence of the presence of aquaporin-like water channels in taste cells. Labeling of isolated taste buds from the fungiform, foliate, and vallate papillae in rat tongue with antibodies ag...
متن کاملExpression of aquaporin water channels in the rat pituitary gland.
We investigated the expression of aquaporin (AQP) subtypes (AQP1-AQP9) in the rat pituitary gland by the reverse transcription-polymerase chain reaction (RT-PCR) and immunohistochemistry. Specific amplification by RT-PCR was observed in AQP1, AQP3, AQP4 and AQP5 but not in the others. AQP1 immunoreactivity was detected in the endothelial cells of blood vessels. No positive reaction to AQP3 was ...
متن کاملSecretin promotes osmotic water transport in rat cholangiocytes by increasing aquaporin-1 water channels in plasma membrane. Evidence for a secretin-induced vesicular translocation of aquaporin-1.
Although secretin is known to stimulate ductal bile secretion by directly interacting with cholangiocytes, the precise cellular mechanisms accounting for this choleretic effect are unknown. We have previously shown that secretin stimulates exocytosis in cholangiocytes and that these cells transport water mainly via the water channel aquaporin-1 (AQP1). In this study, we tested the hypothesis th...
متن کاملMolecular Dynamics Simulation of Water Transportation through Aquaporin-4 in Rat Brain Cells
This paper investigates the mechanism of water transportation through aquaporin-4(AQP4) of ratbrain cells by means of molecular dynamics simulation with CHARMM software. The AQP4 wasembedded into a bilayer made of Dimystroilphosphatylcholine (DMPC). The results illustrate thatwater molecules move through AQP4's channel with change of orientation of oxygen of eachwater molecule.
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ژورنال
عنوان ژورنال: Hepatology
سال: 2000
ISSN: 0270-9139
DOI: 10.1053/jhep.2000.7986