Aldosterone Decreases UT-A1 Urea Transporter Expression via the Mineralocorticoid Receptor
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چکیده
منابع مشابه
Aldosterone decreases UT-A1 urea transporter expression via the mineralocorticoid receptor.
Adrenalectomy in rats is associated with urinary concentrating and diluting defects. This study tested the effect of adrenal steroids on the UT-A1 urea transporter because it is involved in the urine-concentrating mechanism. Rats were adrenalectomized and given normal saline for 14 d, after which they received (1) vehicle, (2) aldosterone, or (3) spironolactone plus aldosterone. Adrenalectomy a...
متن کاملNew Advances in Urea Transporter UT-A1 Membrane Trafficking
The vasopressin-regulated urea transporter UT-A1, expressed in kidney inner medullary collecting duct (IMCD) epithelial cells, plays a critical role in the urinary concentrating mechanisms. As a membrane protein, the function of UT-A1 transport activity relies on its presence in the plasma membrane. Therefore, UT-A1 successfully trafficking to the apical membrane of the polarized epithelial cel...
متن کاملCharacterization of mouse urea transporters UT-A1 and UT-A2.
Specialized transporter proteins that are the products of two closely related genes, UT-A (Slc14a2) and UT-B (Slc14a1), modulate the movement of urea across cell membranes. The purpose of this study was to characterize the mouse variants of two major products of the UT-A gene, UT-A1 and UT-A2. Screening a mouse kidney inner medulla cDNA library yielded 4,047- and 2,876-bp cDNAs, the mouse homol...
متن کاملThe N-terminal 81-aa fragment is critical for UT-A1 urea transporter bioactivity.
The serine protease, furin, is involved in the activation of a number of proteins most notably epithelial sodium channels (ENaC). The urea transporter UT-A1, located in the kidney inner medullary collecting duct (IMCD), is important for urine concentrating ability. UT-A1's amino acid sequence has a consensus furin cleavage site (RSKR) in the N-terminal region. Despite the putative cleavage site...
متن کاملDepolymerization of cortical actin inhibits UT-A1 urea transporter endocytosis but promotes forskolin-stimulated membrane trafficking.
The cytoskeleton participates in many aspects of transporter protein regulation. In this study, by using yeast two-hybrid screening, we identified the cytoskeletal protein actin as a binding partner with the UT-A1 urea transporter. This suggests that actin plays a role in regulating UT-A1 activity. Actin specifically binds to the carboxyl terminus of UT-A1. A serial mutation study shows that ac...
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ژورنال
عنوان ژورنال: Journal of the American Society of Nephrology
سال: 2004
ISSN: 1046-6673,1533-3450
DOI: 10.1097/01.asn.0000113244.37857.ac