Abstract:
BACKGROUND:We have recently found evidence for increased reactive oxygen species (ROS) in rats with lead-induced hypertension. We hypothesized that increased ROS activity may contribute to hypertension by enhancing inactivation of nitric oxide (NO) in this model. METHODS:Rats were treated for 12 weeks with either lead acetate (100 p.p.m.) alone (Pb group) or lead acetate plus vitamin E-fortified food (5000 U/kg rat chow, Pb + E group). The control animals were fed either regular rat chow or a vitamin E-fortified diet. Blood pressure, creatinine clearance, and urinary excretion of stable NO metabolites (NOx) were monitored, and plasma and tissue abundance of nitrotyrosine, which is the footprint of NO oxidation by ROS, were determined. RESULTS:The Pb group showed a marked rise in blood pressure, a significant increase in plasma and kidney, heart, liver, and brain nitrotyrosine abundance, and a substantial fall in urinary NOx excretion. Concomitant administration of high-dose vitamin E in the Pb + E group ameliorated hypertension and normalized both urinary NOx excretion and tissue nitrotyrosine without altering tissue lead content. However, vitamin E supplementation had no discernible effect on either blood pressure or nitrotyrosine abundance in the normal controls. CONCLUSIONS:These findings point to enhanced ROS-mediated inactivation and sequestration of NO, which can potentially contribute to hypertension, tissue damage, and reduced urinary NOx excretion in rats with lead-induced hypertension. The beneficial effects of high-dose vitamin E on blood pressure, tissue nitrotyrosine burden, and urinary NOx excretion support the role of increased ROS activity in the pathogenesis of these abnormalities in this model.
journal_name
Kidney Intjournal_title
Kidney internationalauthors
Vaziri ND,Liang K,Ding Ydoi
10.1046/j.1523-1755.1999.00670.xsubject
Has Abstractpub_date
1999-10-01 00:00:00pages
1492-8issue
4eissn
0085-2538issn
1523-1755pii
S0085-2538(15)46457-9journal_volume
56pub_type
杂志文章abstract::From the urine of patients with calcium nephrolithiasis, and of control subjects, we isolated organic substances according to molecular size and tested them for effects on calcium oxalate precipitation. Nine subgroup materials of varying sizes were prepared by ultrafiltration and Sephadex G-200 column chromatography f...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1982.33
更新日期:1982-02-01 00:00:00
abstract::Platelet activating factor (PAF) is a potent lipid mediator with a broad range of biologic activities. Experimental evidence suggests that PAF plays a role in the pathogenesis of a variety of inflammatory processes including allograft rejection. In this study, we evaluated the effects of the PAF antagonist BN52021 on ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1995.301
更新日期:1995-08-01 00:00:00
abstract::To assess the comparative effects of hemodialysis with acetate versus bicarbonate base on left ventricular systolic function, we performed M-mode echocardiography on 36 patients prior to and immediately following 4-hr maintenance hemodialysis. Patients were initially dialyzed against either sodium acetate or sodium bi...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1985.78
更新日期:1985-05-01 00:00:00
abstract::Cherney and co-workers examine the functional phenotype of the G894T eNOS polymorphism in a selected group of apparently healthy subjects. The investigators used L-arginine infusion and induced changes in renal hemodynamics. While L-arginine increased effective plasma flow and glomerular filtration rate in GG subjects...
journal_title:Kidney international
pub_type: 评论,杂志文章
doi:10.1038/ki.2008.605
更新日期:2009-02-01 00:00:00
abstract::The effect of the tricarboxylic acid (TCA) cycle precursor, pyruvate, on glutamine metabolism by isolated renal cortical mitochondria was assessed by quantitating its key nitrogen and carbon metabolites. When mitochondria from normal rats were incubated at pH 7.4, pyruvate (2 mM) inhibited ammonia production by almost...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1982.166
更新日期:1982-09-01 00:00:00
abstract::Genetic deletion of the adenosine A1 receptor (A1AR) increased renal injury following ischemia-reperfusion injury suggesting that receptor activation is protective in vivo. Here we tested this hypothesis by expressing the human-A(1)AR in A(1)AR knockout mice. Renal ischemia-reperfusion was induced in knockout mice 2 d...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2008.699
更新日期:2009-04-01 00:00:00
abstract::The cytokine interleukin-6 (IL-6) is a major cell regulatory factor that may play an important role in the bone remodeling of patients with renal failure. IL-6 exerts its action by binding to its receptor (IL-6R), which leads to transduction of a second messenger cascade within cells. In vitro as well as in vivo data ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1996.343
更新日期:1996-08-01 00:00:00
abstract::Hemodialysis has a profound effect on fluid balance. Since fluid is initially withdrawn from the intravascular compartment, blood volume will decrease rapidly. A fluid shift (refill) from the overhydrated interstitium towards the intravascular compartment counteracts hypovolemia. Underestimation of postdialytic dry we...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1993.321
更新日期:1993-10-01 00:00:00
abstract::Tenofovir, a widely prescribed antiretroviral medication for treatment of HIV-1 infection, is infrequently associated with renal dysfunction and biopsy findings of acute tubular necrosis. We examined the clinical and pathological findings in 13 cases of tenofovir nephrotoxicity (7 men and 6 women, mean age of 51.1±9.6...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2010.318
更新日期:2010-12-01 00:00:00
abstract:BACKGROUND:Atherogenic lipoproteins cause injury to the vascular wall in the early phase of atherogenesis. We assessed the effects of native (nLDL) and oxidized (oxLDL) low-density lipoprotein (LDL) and lipoprotein (a) [Lp(a)] on O2- formation and cell death in cultured human umbilical vein endothelial cells (HUVECs) a...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.1999.00351.x
更新日期:1999-04-01 00:00:00
abstract::The processes of growth and remodeling that characterize growing bone are vulnerable to the biochemical effects of uremia. These processes are affected by the alterations in vitamin D metabolism and hyperparathyroidism that commonly occur with chronic renal insufficiency. Uremia interferes with cartilaginous developme...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1038/ki.1978.136
更新日期:1978-10-01 00:00:00
abstract:BACKGROUND:Recent advances in the understanding of the molecular biology of rodent renal development have lead to the ability to culture the components of the developing rat kidney-the ureteric bud (UB) and the metanephric mesenchyme (MM)-in isolation from one another. Here we here describe a method for subculturing an...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2002.00694.x
更新日期:2002-12-01 00:00:00
abstract::Inflammation is a protective response to remove dangerous stimuli from the body. The multiprotein complex called the inflammasome regulates inflammation through the cleavage of proinflammatory cytokines into mature forms. Shahzad et al. unravel the importance of the Nlrp3 inflammasome, especially activated in glomerul...
journal_title:Kidney international
pub_type: 评论,杂志文章
doi:10.1038/ki.2014.322
更新日期:2015-01-01 00:00:00
abstract::The release of cytokines and prostaglandins (PG) by peritoneal macrophages (PM luminal diameter of) may influence the cytokine network controlling peritoneal inflammation and in the long-term the function of the peritoneum as a dialysis membrane. In the present study, an evaluation of the long-term effects of peritone...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1996.75
更新日期:1996-02-01 00:00:00
abstract::Erythropoiesis stimulating agent (ESA) treatment has been a major advance in the care of patients with kidney disease, resulting in reduced symptoms and blood transfusions, and improved quality of life. Recent studies, however, have indicated that attempts to treat to near normal Hgb targets may result in increased ri...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1038/ki.2008.467
更新日期:2009-02-01 00:00:00
abstract::Administration of antibody, directed against glomerular basement membrane (GBM) heparan sulfate-proteoglycan, into a presensitized rat results in the induction of membranous nephropathy with subepithelial immune-complex deposits. In this investigation, we examined the mechanisms responsible for the formation of subepi...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1988.166
更新日期:1988-08-01 00:00:00
abstract::Transforming growth factor-β1 (TGF-β1) upregulation occurs in virtually all chronic kidney diseases and is associated with podocyte injury and proteinuria; however, the mechanisms contributing to this in vivo are ambiguous. In vitro, incubation of podocytes with TGF-β1 induced Wnt1 expression, β-catenin activation, an...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2011.255
更新日期:2011-12-01 00:00:00
abstract:BACKGROUND:To study the molecular mechanism responsible for cadmium-induced Fanconi syndrome, an in vitro mouse model has been used. We have previously shown that exposure of primary cultures of kidney cortical cells to micromolar concentrations of cadmium inhibited uptake of the glucose analog, [14C] methyl alpha-d-gl...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2003.00201.x
更新日期:2003-10-01 00:00:00
abstract::Renal toxicity, possibly due to vasoconstriction and vascular injury, is the most relevant side-effect of chronic cyclosporine (CsA) therapy given to prevent graft rejection. In kidney transplant recipients each oral dose of CsA is invariably followed by a transient reduction in renal plasma flow (RPF) and glomerular ...
journal_title:Kidney international
pub_type: 临床试验,杂志文章
doi:10.1038/ki.1993.101
更新日期:1993-03-01 00:00:00
abstract::Renal iron handling was characterized in three experimental models of the nephrotic syndrome: puromycin aminonucleoside, adriamycin and nephrotoxic serum. In adriamycin-induced nephrotic syndrome, which has previously been shown to result from alterations in pore size of the filtration barrier, the transferrin leak wa...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1990.130
更新日期:1990-06-01 00:00:00
abstract::We described the characteristics in a referred cohort of type II diabetic patients in the Developing Education on Microalbuminuria for Awareness of renal and cardiovascular risk in Diabetes study evaluating the global prevalence and determinants of microalbuminuria (MA). A cross-sectional study evaluating 32,208 type ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/sj.ki.5000377
更新日期:2006-06-01 00:00:00
abstract::The primary goal of this study was to determine if the ability to undergo catch-up growth following a transient injury is preserved in an experimental model of moderate chronic renal failure (CRF) and the effect of growth hormone (GH) administration on such phenomenon. Young rats were subtotally nephrectomized (days 0...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/sj.ki.5001949
更新日期:2006-12-01 00:00:00
abstract::Atrial natriuretic peptide (ANP) is known to suppress platelet-derived growth factor (PDGF)-stimulated proliferation of rat cultured vascular smooth muscle cells. The present study examined whether ANP inhibits the PDGF receptor (PDGFR) tyrosine kinase activation, an initial event for PDGF cellular signaling. ANP redu...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1997.341
更新日期:1997-08-01 00:00:00
abstract:BACKGROUND:Erythropoietin is known to improve outcomes in patients with anemia from chronic renal disease. However, there is uncertainty about the optimal timing of initiation of erythropoietin treatment in predialysis patients with non-severe anemia. METHODS:We conducted a randomized controlled trial of early versus ...
journal_title:Kidney international
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1523-1755.2004.00797.x
更新日期:2004-08-01 00:00:00
abstract::When the endotoxin-lipopolysaccharide (LPS) derived from the cell wall of gram-negative bacteria is given to the rat in vivo, there are prompt, marked decreases in glomerular filtration rate (GFR), renal blood flow (RBF) and % Na+ reabsorption (%T-Na+). However, it has not been determined whether the endotoxin itself ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1990.105
更新日期:1990-05-01 00:00:00
abstract::In this retrospective study, we analyzed clinical laboratory, and pathologic variables to determine their value in predicting survival and survival free of renal failure for 170 consecutive patients with idiopathic renal vasculitis and glomerulonephritis evaluated during a 15 year period. Of the 170 patients, 108 had ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1989.312
更新日期:1989-12-01 00:00:00
abstract::Diagnosis and treatment of atherosclerotic renal artery stenosis (ARAS) in the elderly is a never-ending challenge for every nephrologist. Kalra et al. report that adjusted hazard ratios for ARAS increased threefold from 1992 to 2004 in 16 million United States Renal Data System participants aged 66 years or older. Ho...
journal_title:Kidney international
pub_type: 信件
doi:10.1038/ki.2009.326
更新日期:2010-01-01 00:00:00
abstract::Diabetic kidney disease is the leading cause of kidney failure. However, studies of molecular mechanisms of early kidney damage are lacking. Here we examined for possible linkage between transcriptional regulation and quantitative structural damage in early diabetic kidney disease in Pima Indians with type 2 diabetes....
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1016/j.kint.2017.08.013
更新日期:2018-02-01 00:00:00
abstract:BACKGROUND:Tumor necrosis factor (TNF) receptor family members, such as Fas and TNF receptor 1 (TNFR1), are thought to induce apoptosis in a variety of cells and organs. Although a number of potential scenarios have been postulated for the involvement of these receptors in the pathogenesis of acute renal failure (ARF),...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2003.00709.x
更新日期:2003-01-01 00:00:00
abstract::The highly amiloride-sensitive epithelial sodium channel (ENaC) is an apical membrane constituent of cells of many salt-absorbing epithelia. In the kidney, the functional relevance of ENaC expression has been well established. ENaC mediates the aldosterone-dependent sodium reabsorption in the distal nephron and is inv...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1046/j.1523-1755.2000.00968.x
更新日期:2000-04-01 00:00:00