Kidney Concentrating Ability
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Kidney dysfunction and beta S-haplotypes in patients with sickle cell disease
Objective: To investigate the association between kidney dysfunction and haplotypes in sickle cell disease. Methods: A cohort of 84 sickle cell disease patients, treated in a public health service in Fortaleza, Brazil, was studied. Hemo
Rev. Bras. Hematol. Hemoter.. Publicado em: 2013-06
-
2. Renal effects of Pkd1 gene haploinsufficiency in mice / "Efeitos renais da haploinsuficiência do gene Pkd1 (Polycystic kidney disease 1) em camundongos"
Vários estudos mostram que na doença renal policística autossômica dominante os cistos surgem a partir de um mecanismo de "dois-golpes". A patogênese das manifestações não-císticas, contudo, é pouco compreendida. Neste estudo usamos uma linhagem de camundongos endogâmica com uma mutação nula em Pkd1, onde animais heterozigotos apresentam formaç
Publicado em: 2005
-
3. β1-Integrin is required for kidney collecting duct morphogenesis and maintenance of renal function
Deletion of integrin-β1 (Itgb1) in the kidney collecting system led to progressive renal dysfunction and polyuria. The defect in the concentrating ability of the kidney was concomitant with decreased medullary collecting duct expression of aquaporin-2 and arginine vasopressin receptor 2, while histological examination revealed hypoplastic renal medullary co
American Physiological Society.
-
4. A study of the intrarenal recycling of urea in the rat with chronic experimental pyelonephritis.
The concentrating ability of the kidney was studied by clearance and micropuncture techniques and tissue slice analyses in normal rats with two intact kidneys (intact controls), normal rats with a solitary kidney (uninephrectomized controls), and uremic rats with a single pyelonephritic kidney. Urinary osmolality after water deprivation for 24 h and administ
-
5. Nephrogenic diabetes insipidus in mice lacking aquaporin-3 water channels
Aquaporin-3 (AQP3) is a water channel expressed at the basolateral plasma membrane of kidney collecting-duct epithelial cells. The mouse AQP3 cDNA was isolated and encodes a 292-amino acid water/glycerol-transporting glycoprotein expressed in kidney, large airways, eye, urinary bladder, skin, and gastrointestinal tract. The mouse AQP3 gene was analyzed, and
The National Academy of Sciences.
-
6. Cloning, characterization, and chromosomal mapping of human aquaporin of collecting duct.
We recently cloned a cDNA of the collecting duct apical membrane water channel of rat kidney, which is important for the formation of concentrated urine (Fushima, K., S. Uchida, Y. Hara, Y. Hirata, F. Marumo, and S. Sasaki. 1993. Nature [Lond.]. 361:549-552). Since urine concentrating ability varies among mammalian species, we examined whether an homologous
-
7. Cloning and regulation of expression of the rat kidney urea transporter (rUT2).
In mammals, urea is the predominant end-product of nitrogen metabolism and plays a central role in the urinary-concentrating mechanism. Urea accumulation in the renal medulla is critical to the ability of the kidney to concentrate urine to an osmolality greater than systemic plasma. Regulation of urea excretion and accumulation in the renal medulla depends o
-
8. Reduced water permeability and altered ultrastructure in thin descending limb of Henle in aquaporin-1 null mice
It has been controversial whether high water permeability in the thin descending limb of Henle (TDLH) is required for formation of a concentrated urine by the kidney. Freeze-fracture electron microscopy (FFEM) of rat TDLH has shown an exceptionally high density of intramembrane particles (IMPs), which were proposed to consist of tetramers of aquaporin-1 (AQP
American Society for Clinical Investigation.
-
9. Generation and phenotype of mice harboring a nonsense mutation in the V2 vasopressin receptor gene
The V2 vasopressin receptor (V2R) plays a key role in the maintenance of a normal body water balance. To generate an in vivo model that allows the physiological and molecular analysis of the role of V2Rs in kidney function, we have created mouse lines that lack functional V2Rs by using targeted mutagenesis in mouse embryonic stem cells. Specifically, we intr
American Society for Clinical Investigation.
-
10. Caveolin-1 directly interacts with UT-A1 urea transporter: the role of caveolae/lipid rafts in UT-A1 regulation at the cell membrane
The cell plasma membrane contains specialized microdomains called lipid rafts which contain high amounts of sphingolipids and cholesterol. Lipid rafts are involved in a number of membrane protein functions. The urea transporter UT-A1, located in the kidney inner medullary collecting duct (IMCD), is important for urine concentrating ability. In this study, we
American Physiological Society.
-
11. Apoptosis Contributes to Amphotericin B- Induced Nephrotoxicity
The aim of this study was to investigate whether apoptosis contributes to nephrotoxicity caused by amphotericin B (AmB). By detecting apoptosis-specific DNA fragmentation, it is demonstrated that proximal tubular cells (LLC-PK1) and medullary interstitial cells (RMIC) respond with programmed cell death when treated with therapeutic doses of AmB. Concomitant
American Society for Microbiology.
-
12. Generation and phenotype of a transgenic knockout mouse lacking the mercurial-insensitive water channel aquaporin-4.
Aquaporin-4 (AQP4) is a mercurial-insensitive, water-selective channel that is expressed in astroglia and basolateral plasma membranes of epithelia in the kidney collecting duct, airways, stomach, and colon. A targeting vector for homologous recombination was constructed using a 7-kb SacI AQP4 genomic fragment in which part of the exon 1 coding sequence was