Abstract:
:We have recently presented evidence that endogenous nitric oxide (NO) and prostaglandins (PGs) modulate angiotensin II (Ang II) action in microperfused afferent arterioles (Af-Arts). Because flow may be a physiological stimulus of endothelial release of NO and PGs, we tested the hypothesis that flow through the lumen of the Af-Art stimulates the endothelium to produce NO and PGs, which in turn modulate the action of Ang II. We microdissected the terminal segment of an interlobular artery together with two Af-Arts, their glomeruli and efferent arterioles (Ef-Art). The two Af-Arts were perfused simultaneously from the interlobular artery, while one Ef-Art was occluded. Since the arteriolar perfusate contained 5% albumin, oncotic pressure built up in the glomerulus with the occluded Ef-Art and opposed the force of filtration, resulting in little or no flow through the corresponding Af-Art. Thus this preparation allowed us to observe Ang II action in free-flow and non-flow Af-Arts simultaneously. Ang II-induced constriction was weaker in free-flow than non-flow Af-Arts, with the luminal diameter decreasing by 8 +/- 2% and 23 +/- 3% at 10(-9) M, respectively (P < 0.013 free-flow vs. non-flow; N = 9). Disrupting the endothelium augmented Ang II action in free-flow (33 +/- 5.1%; P < 0.01 vs. intact endothelium) but not non-flow Af-Arts (31 +/- 5.3%), thus abolishing the differences between them (N = 8). Pretreatment with an inhibitor of either NO synthase (N-nitro-L-arginine methyl ester) or cyclooxygenase (indomethacin) augmented Ang II action more in free-flow than non-flow Af-Arts, likewise abolishing the differences between them. These results suggest that intraluminal flow modulates the vasoconstrictor action of Ang II in Af-Arts via endothelium-derived NO and PGs. Thus flow may be important in the fine control of glomerular hemodynamics.
journal_name
Kidney Intjournal_title
Kidney internationalauthors
Juncos LA,Ren Y,Arima S,Garvin J,Carretero OA,Ito Sdoi
10.1038/ki.1996.55subject
Has Abstractpub_date
1996-02-01 00:00:00pages
374-81issue
2eissn
0085-2538issn
1523-1755pii
S0085-2538(15)59349-6journal_volume
49pub_type
杂志文章abstract:BACKGROUND:Microalbuminuria (MA) is a strong predictor of cardiovascular disease, but its causes are incompletely understood. Hyperhomocysteinemia is a recently recognized risk factor for cardiovascular disease independent of established risk factors. It is not known whether hyperhomocysteinemia is associated with MA, ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/sj.ki.4495353
更新日期:1998-07-01 00:00:00
abstract::This study was undertaken to test the hypothesis that, given equal arterial pressure reductions, the combination of an angiotensin converting enzyme (ACE) inhibitor and calcium antagonist slows declines in renal function and yields greater reductions in albuminuria over either agent alone. This hypothesis was evaluate...
journal_title:Kidney international
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1038/ki.1992.139
更新日期:1992-04-01 00:00:00
abstract::Fixed anionic sites within the glomerular capillary wall influence the permeation of serum proteins, the localization of various antigens, and the deposition of antibody in the subepithelial space. In anti-GBM nephritis antibody deposition occurs very rapidly to antigenic sites located relatively proximal in the glome...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1984.188
更新日期:1984-10-01 00:00:00
abstract::Toward an etiological classification of developmental disorders of the kidney and upper urinary tract. There are a large number of developmental disorders and syndromes that affect the kidney and upper urinary tract. These have generally been classified according to morphological criteria established decades ago. Alth...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1046/j.1523-1755.2002.00086.x
更新日期:2002-01-01 00:00:00
abstract::Zhang and co-workers report on the renoprotective role of the vitamin D receptor (VDR) in diabetic nephropathy using the method of streptozotocin-induced hyperglycemia in wild-type and VDR(-/-) mice. Also, experiments with cultured mesangial cells and podocytes confirm the effect of the active vitamin D metabolite 1,2...
journal_title:Kidney international
pub_type: 评论,杂志文章
doi:10.1038/sj.ki.5002693
更新日期:2008-01-01 00:00:00
abstract::Staphylococcal neutral phosphatase (NPtase) is a highly cationic bacterial surface bound protein. It has significant affinity for human and rat immunoglobulins in vitro and an electrostatic interaction may be involved. Radioisotopic studies showed that NPtase had a high affinity for the polyanionic structures of the r...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1996.314
更新日期:1996-07-01 00:00:00
abstract::Impaired olfactory function is a marker of neurologic dysfunction in the uremic state. Retained uremic toxins not adequately cleared with dialysis may undermine the integrity of the olfactory epithelium and olfactory bulb and malign central olfactory processing. The evidence suggests that only renal transplantation, w...
journal_title:Kidney international
pub_type: 评论,社论
doi:10.1038/ki.2011.219
更新日期:2011-10-01 00:00:00
abstract::Extracellular fluid volume expansion is known to produce exaggerated natriuresis in essential hypertension. In order to assess the role of hemodynamic and intrarenal physical factors upon natriuretic response to central volume expansion, two hour water immersion (WI) experiments were made in six uncomplicated essentia...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1988.79
更新日期:1988-04-01 00:00:00
abstract::Renin secretion was compared in vivo and in vitro among five groups of rats, each group subjected to a different sodium balance for 10 to 14 days. The state of the renin-angiotensin system in vivo was evaluated by measuring the renal renin (RR) and the plasma renin concentration (PRC) in both anesthetized and nonanest...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1980.71
更新日期:1980-05-01 00:00:00
abstract::The acute renal effects of hypoxemia and the ability of theophylline to prevent these effects were assessed in anesthetized and mechanically-ventilated newborn and adult rabbits. Renal blood flow (RBF) and glomerular filtration rate (GFR) were determined by the clearance of para-aminohippuric acid and inulin, respecti...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1988.114
更新日期:1988-06-01 00:00:00
abstract:BACKGROUND:Several examinations have been performed to identify the genes involved in chronic renal failure using 5/6 nephrectomized rats. Recently, many systematic techniques for examining molecular expression have been developed. They might also be effective in elucidating the molecular mechanism of progressive renal...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1111/j.1523-1755.2004.00704.x
更新日期:2004-07-01 00:00:00
abstract::The vasopressin inhibitor tolvaptan is clinically effective in slowing growth of renal cysts and reduction in estimated glomerular filtration rate (eGFR) in autosomal dominant polycystic kidney disease (ADPKD), but these effects are mitigated by the associated polyuria. Changes of total kidney volume, eGFR, and sympto...
journal_title:Kidney international
pub_type: 评论,杂志文章
doi:10.1038/ki.2015.143
更新日期:2015-07-01 00:00:00
abstract::Monocyte and macrophage markers are among the most highly overexpressed genes in cpk mouse kidneys with severely progressive renal cystic disease. We show here that one of these markers, CD14, is abnormally transcribed, activated and shed in cystic kidneys. However, these abnormalities were not associated with an incr...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2010.175
更新日期:2010-09-01 00:00:00
abstract::Clinical and experimental studies have shown that serum aluminum (Al) is bound to transferrin and that cellular uptake of Al appears to be mediated by transferrin receptors. Based on these findings it is widely believed that intestinal Al absorption occurs via iron-specific, transferrin-dependent pathways and that iro...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1996.509
更新日期:1996-12-01 00:00:00
abstract:BACKGROUND:Estradiol suppresses the synthesis of type I collagen by murine mesangial cells. However, neither the alpha 1(I) nor the alpha 2(I) collagen gene contains an estrogen-response element. Because estradiol modulates the transcription of several genes that lack an estrogen-response element but contain a regulato...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.1999.00376.x
更新日期:1999-04-01 00:00:00
abstract::Although much emphasis has been placed on screening for albuminuria in type II diabetic patients, less attention has been focused on the role of glomerular filtration rate (GFR) in the assessment of risk. Herein, we examined the association between GFR and vascular complications in a consecutive cohort of 5174 type II...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/sj.ki.5000061
更新日期:2006-01-01 00:00:00
abstract::A study of dialysis costs in five major dialysis centers throughout the United States was conducted in 1973. When available, home, home training, limited care, satellite and in-hospital-full-care dialysis were included. The study's objective was to determine the cost per dialysis for each separate dialysis modality. A...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1976.31
更新日期:1976-03-01 00:00:00
abstract::We reviewed the diagnostic features and clinical course of 140 patients with idiopathic membranous nephropathy who had their index renal biopsies performed at the Mayo Clinic between 1972 and 1984. There were 93 males and 47 females (average age, 50.8 +/- 17 years); 116 patients (83%) had the nephrotic syndrome and 42...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1988.56
更新日期:1988-03-01 00:00:00
abstract:BACKGROUND:Fructose is a nutrient as well as a potent agent for the formation of advanced glycation end product in diabetes. GLUT5 is a facilitated-diffusion fructose transporter expressed in the small intestine and kidney. Previous reports on the localization of GLUT5 by in situ hybridization and immunohistochemistry ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.1999.00635.x
更新日期:1999-09-01 00:00:00
abstract::Twelve patients with progressive renal failure were placed on a very low protein diet supplemented by an essential amino acid-keto acid mixture for six to twelve months. Total daily intake was 0.04 g nitrogen/kg and 50 kcal/kg. Eight subjects had a significant change in the slope of reciprocal plasma creatinine, becom...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1986.99
更新日期:1986-05-01 00:00:00
abstract::The Diabetes Control and Complications Trial (DCCT) has demonstrated that intensive diabetes treatment delays the onset and slows the progression of retinopathy, nephropathy, and neuropathy in patients with IDDM. A detailed description of the effects of this treatment on diabetic nephropathy is presented here. In the ...
journal_title:Kidney international
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1038/ki.1995.236
更新日期:1995-06-01 00:00:00
abstract:BACKGROUND:Although renal protective effect of interrupting the inflammatory process is well established, it is still controversial if it also prevents the glomerular hemodynamic disturbances that initiate renal injury. We investigated the effects of suppressing inflammation with mycophenolate mofetil (MMF) on glomerul...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2003.00811.x
更新日期:2003-03-01 00:00:00
abstract::Accurate measurement of glomerular filtration rate (GFR) is complicated and costly; therefore, GFR is commonly estimated by assessing creatinine or cystatin C concentrations. Because estimates based on cystatin C predict cardiovascular disease better than creatinine, these estimates have been hypothesized to be superi...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2010.321
更新日期:2010-12-01 00:00:00
abstract::Serum calcitriol and the free calcitriol index together with factors considered to regulate calcitriol production were measured in eleven patients with moderate chronic renal failure (MCRF) and eleven age- and sex-matched normal subjects. Although the serum dialysable calcium levels were similar in the two groups, the...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1988.58
更新日期:1988-03-01 00:00:00
abstract::Long-term (5 years) treatment of 20 growth-retarded pre-pubertal children with chronic renal insufficiency (CRI) led to a significant (P < 0.00005) improvement in standardized height from -2.6 at baseline to -0.7 at five years. Eight patients were paused after reaching target height (50th centile midparental height) a...
journal_title:Kidney international
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1038/ki.1996.108
更新日期:1996-03-01 00:00:00
abstract:BACKGROUND:Previous reports have shown the presence of erythrogenic toxin type B (ETB), apoptosis, proliferation, and leukocyte infiltration in biopsies from patients with acute poststreptococcal glomerulonephritis (APSGN). METHODS:Attempting to correlate the apoptotic and proliferative events with the interaction of ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2001.059003950.x
更新日期:2001-03-01 00:00:00
abstract:BACKGROUND:The aim of this study was to establish whether there is a differential effect of mode of dialysis, hemodialysis (HD), or continuous ambulatory peritoneal dialysis (CAPD) on the dyslipidemia of renal failure. METHODS:The lipoprotein profile was determined in 61 non-diabetic patients on chronic HD (N = 30) an...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.1999.00375.x
更新日期:1999-04-01 00:00:00
abstract:BACKGROUND:Advanced glycation of proteins and their attendant advanced glycation end products (AGEs) contribute to the complications associated with diabetes mellitus or uremia. Regulatory mechanisms of AGE formation in vivo remain an issue of particular interest. We investigated a role of the glyoxalase detoxification...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2001.00051.x
更新日期:2001-12-01 00:00:00
abstract::The renal growth hormone--insulin-like growth factor-I system in acute ischemic renal failure. Recovery from acute tubular necrosis (ATN) is accelerated by IGF-I therapy. Furthermore, the local renal growth hormone-IGF-I system may participate in the natural repair. We examined the IGF-I system in rat kidneys subjecte...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1995.230
更新日期:1995-06-01 00:00:00
abstract::Transcriptome analysis of a rat polycystic kidney disease (PKD) model: importance of genes involved in extracellular matrix metabolism. PKD is a common genetic cause of chronic renal failure, and is characterized by the accumulation of fluid-filled cysts in the kidneys and other organs. Abnormalities in the expression...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/sj.ki.5000309
更新日期:2006-05-01 00:00:00