Abstract:
:Spontaneous and aspirated blood samples were collected from the welling points of surface efferent arterioles in the rat kidney. The amount of tubular reabsorbate in each sample was calculated from measurements of the inulin concentration in the sample and systemic arterial plasma. Both spontaneous and aspirated samples contained substantial amounts of tubular reabsorbate (4% +/- 1% and 11% +/- 1%, respectively). Accordingly, the single nephron filtration fraction values derived from measurements of albumin concentrations alone were significantly lower than those calculated considering the addition of the amount of tubular reabsorbate in each sample (0.26 +/- 0.01 vs. 0.30 +/- 0.01 and 0.25 +/- 0.01 vs. 0.34 +/- 0.01 for the spontaneous and aspirated samples, respectively). Increasing the rate of blood collection from the welling point by aspiration was associated with a significant decrease in the hydraulic pressure in the same vessel. The efferent arteriolar blood samples were therefore probably contaminated with tubular reabsorbate as a result of retrograde flow from the peritubular capillaries. It was confirmed that single nephron filtration fractions derived from hematocrit measurements were significantly higher than those based on albumin concentration measurements, supporting that the hematocrit of afferent arteriolar blood of the superficial nephrons is higher than that of systemic arterial blood.
journal_name
Kidney Intjournal_title
Kidney internationalauthors
Jensen PK,Blaehr H,Steven Kdoi
10.1038/ki.1984.44subject
Has Abstractpub_date
1984-03-01 00:00:00pages
486-91issue
3eissn
0085-2538issn
1523-1755pii
S0085-2538(15)33153-7journal_volume
25pub_type
杂志文章abstract::Human transitional B cells express relatively high IL-10 and low TNF-α levels, which correlate with B regulatory activity in vitro. Herein, we aim to further define B regulatory phenotype and determine whether B regulatory activity can serve as a prognostic marker for renal allograft dysfunction (graft loss or 2-fold ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1016/j.kint.2016.08.028
更新日期:2017-01-01 00:00:00
abstract::The members of the matrix metalloproteinase gene family play critical roles in numerous physiologic events, including cellular migration, tissue remodeling in wound healing and development, as well as in the evolution of the inflammatory process. The 72 kDa gelatinase A (formerly denoted 72 kDa Type IV collagenase) is...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1038/ki.1997.191
更新日期:1997-05-01 00:00:00
abstract::Intrarenal artery infusions of hypertonic saline can activate tubuloglomerular feedback (TGF), decreasing renal blood flow (RBF) and glomerular filtration rate (GFR). The response to infusion of hypertonic saline is enhanced by salt depletion and attenuated by salt loading, but has not previously been investigated in ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1987.236
更新日期:1987-10-01 00:00:00
abstract::To investigate whether the administration of cimetidine can improve the reliability of creatinine as a marker of GFR, we compared the creatinine clearance (CCr) to the clearance of the true filtration markers 51Cr-EDTA (CEDTA) and inulin (CIn), after oral ingestion of cimetidine in 10 healthy men and 29 patients with ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1991.331
更新日期:1991-12-01 00:00:00
abstract::Highly presensitized patients wait longer for a renal allograft than unsensitized patients and have a poorer allograft survival rate. Repeated blood transfusions have been implicated in the induction and maintenance of sensitization. To determine the effect of recombinant human erythropoietin (rHuEPO) therapy on five ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1990.161
更新日期:1990-07-01 00:00:00
abstract:BACKGROUND:In inflammation, urokinase plasminogen activator (uPA) and its receptor (uPAR) play an important role in fibrinolysis and in activation and chemotaxis of neutrophils and lymphocytes. Moreover, the uPA/uPAR system is involved in processes that affect turnover of the extracellular matrix (ECM). The aim of this...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2003.00261.x
更新日期:2003-11-01 00:00:00
abstract::It is no a secret that we are confronted by an alarmingly increasing number of patients with progressive renal disease. There is ample evidence for the notion that angiotensin II (Ang II) is a major culprit in progression. The vasopeptide Ang II turned out to have also multiple nonhemodynamic pathophysiologic actions ...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1111/j.1523-1755.2005.00145.x
更新日期:2005-03-01 00:00:00
abstract::Vitamin D receptor agonists (VDRAs) inhibit the renin-angiotensin system (RAS) and reduce podocyte loss and fibrosis over and above RAS blockade. Several studies in humans show that VDRAs are antiproteinuric and have the potential to delay the progression of renal disease. Whether VDRAs will accomplish this goal among...
journal_title:Kidney international
pub_type: 评论,杂志文章
doi:10.1038/ki.2010.77
更新日期:2010-06-01 00:00:00
abstract::To analyze the role of clusterin in renal diseases involving a regenerative process, we have used a novel rodent model to compare temporal and spatial expression of clusterin mRNA. Thus, renal artery stenosis was used to induce unilateral non-infarctive renal atrophy. After several weeks, when cellular pathology of at...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1995.54
更新日期:1995-02-01 00:00:00
abstract::Chronic kidney disease (CKD) is a key cause of hypertension and a potent independent risk for cardiovascular disease. Epidemiological studies suggest a strong genetic component determining susceptibility for renal disease and, by inference, the associated cardiovascular risk. With a subtotal nephrectomy model of kidne...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/sj.ki.5002519
更新日期:2007-11-01 00:00:00
abstract::Insulin resistance has been associated with kidney disease even in the absence of diabetes; however, pathways linking insulin resistance to kidney disease are unclear. The purpose of this study was to determine if transforming growth factor (TGF)-beta1, a key cytokine associated with kidney disease, responds to circul...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2010.109
更新日期:2010-08-01 00:00:00
abstract::Higher diet-dependent nonvolatile acid load is associated with faster chronic kidney disease (CKD) progression, but most studies have used estimated acid load or measured only components of the gold standard, net acid excretion (NAE). Here we measured NAE as the sum of urine ammonium and titratable acidity in 24-hour ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1016/j.kint.2016.09.012
更新日期:2017-01-01 00:00:00
abstract::To evaluate the underlying mechanism of the putative renal protective effects of angiotensin converting enzyme (ACE) inhibitors, the modulatory action of captopril on the angiotensin II (Ang II) and platelet-derived growth factor (PDGF)-induced increase of cytosolic free calcium concentration ([Ca2+]i) was investigate...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1994.323
更新日期:1994-09-01 00:00:00
abstract::Bovine serum albumin (BSA, pI 4.9) was maleylated to yield highly anionic MBSA (pI 3.0). Maleylation of BSA lead to an expansion of molecular size of native BSA from an effective molecular radius (EMR) of 37 A to 57 A for MBSA as assessed by gel filtration chromatography. MBSA, but not BSA, bound to the peripheral cap...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1988.161
更新日期:1988-08-01 00:00:00
abstract::In this mini review, we would like to challenge the well-established 'fact' that lead exposure causes chronic renal failure (CRF). Even though only scarce evidence exists of the relationship between lead and renal failure, a World Health Organization Environmental Health Criteria document summarizes that 'Lead has bee...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1038/ki.2010.394
更新日期:2011-02-01 00:00:00
abstract::Bone-derived fibroblast growth factor-23 (FGF23) plays an important role in systemic phosphate turnover. Increased FGF23 activity results in hypophosphatemic disorders, while reduced activity is linked to hyperphosphatemic disorders. FGF23, together with klotho as co-factor, can activate FGF receptors in its target ti...
journal_title:Kidney international
pub_type: 评论,杂志文章
doi:10.1038/ki.2014.316
更新日期:2014-12-01 00:00:00
abstract::The effects of intravenous (i.v.) and intracarotid (IC) angiotensin II (AII) infusion on systemic and renal hemodynamics, renal water excretion, and plasma antidiuretic hormone (ADH) levels were examined in six conscious dogs under water loaded and hydropenic conditions. In the first group of seven studies, AII in a m...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1986.214
更新日期:1986-10-01 00:00:00
abstract:BACKGROUND:The ontogeny of the renal mineralocorticoid (MR) and glucocorticoid (GR) receptors in the ovine fetus, and the effects of early exposure to synthetic or natural glucocorticoids on the expression of these genes in late gestation were examined. METHODS:A partial cDNA sequence for the ovine MR was cloned and u...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2002.00157.x
更新日期:2002-02-01 00:00:00
abstract:BACKGROUND:Low birth weight is an important risk factor for hypertension and unfavorable prognoses of a number of renal diseases. It is also associated with reduced kidney size and nephron number. A differentiation between the effects of low birth weight versus being born premature or small for gestational age has, how...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1111/j.1523-1755.2005.00451.x
更新日期:2005-08-01 00:00:00
abstract::The impact of pediatric chronic kidney disease (CKD) on acquisition of volumetric bone mineral density (BMD) and cortical dimensions is lacking. To address this issue, we obtained tibia quantitative computed tomography scans from 103 patients aged 5-21 years with CKD (26 on dialysis) at baseline and 12 months later. G...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2012.347
更新日期:2013-03-01 00:00:00
abstract:BACKGROUND:Low dialysate calcium (LdCa) concentration is used to prevent or treat hemodialysis (HD)-induced hypercalcemia, but its use has been complicated by intradialytic hypotension in some patients. Our goal was to explore the possibility that dialysis calcium profiling (dCaP) can ameliorate intradialytic hypotensi...
journal_title:Kidney international
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1046/j.1523-1755.2002.00100.x
更新日期:2002-01-01 00:00:00
abstract::Aminopeptidase A is one of the most potent enzymes within the renin-angiotensin system in terms of angiotensin II degradation. Here, we examined whether there is a kidney phenotype and any compensatory changes in other renin angiotensin system enzymes involved in the metabolism of angiotensin II associated with aminop...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1016/j.kint.2020.11.012
更新日期:2020-12-11 00:00:00
abstract:BACKGROUND:Transplantation of developing metanephroi into adult hosts has been proposed as a means to augment host renal function. METHODS:We implanted whole metanephroi from embryonic day 15 (E15) rats subcapsularly in kidneys or into the omentum of non-immunosupressed adult rat hosts. At the time of implantation, so...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.1998.00971.x
更新日期:1998-07-01 00:00:00
abstract::IgA nephropathy (IgAN) often shows lesions morphologically identical with those of focal segmental glomerulosclerosis (FSGS). In order to determine the possible role of FSGS in IgAN lesions, we measured glomerular capsular adhesions, often the first step toward FSGS, in biopsies from 127 patients with IgAN, 100 with l...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2010.466
更新日期:2011-03-01 00:00:00
abstract::We have developed an immunological procedure for measuring advanced glycosylation end-products (AGEs) in serum. Using this method, we measured AGEs in healthy volunteers, patients with diabetes, renal failure without treatment and in patients with renal failure, treated with hemodialysis (HD) or continuous ambulatory ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1994.262
更新日期:1994-07-01 00:00:00
abstract::Membranous nephropathy is a major cause of nephrotic syndrome in adults where podocyte injuries were found to mediate the development of proteinuria. Triptolide, a major active component of Tripterygium wilfordii Hook F, has potent immunosuppressive, anti-inflammatory and antiproteinuric effects. To study its antiprot...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2010.41
更新日期:2010-06-01 00:00:00
abstract:BACKGROUND:Nephrotoxic glomerulonephritis is induced by the administration of antibody against the glomerular basement membrane (GBM). We demonstrated previously that Fc receptors for immunoglobulin G (IgG) (FcgammaR) play crucial roles in the induction of accelerated nephrotoxic glomerulonephritis by using FcRgamma-de...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2003.00203.x
更新日期:2003-10-01 00:00:00
abstract::Although it is clear that genetic predispositions play a role in progressive glomerulosclerosis, identification of specific genes is difficult because of natural genetic heterogeneity among individuals. We have reported a differential susceptibility to progressive glomerulosclerosis after induction of experimental glo...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/sj.ki.5001757
更新日期:2006-10-01 00:00:00
abstract::Pathogenesis of vascular calcification in chronic kidney disease. Background. Hyperphosphatemia and hypercalcemia are independent risk factors for higher incidence of cardiovascular events in patients with chronic kidney disease. In addition to increased calcium-phosphate product, hyperphosphatemia accelerates the pro...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1111/j.1523-1755.2005.00421.x
更新日期:2005-08-01 00:00:00
abstract::Residual kidney function (RKF) may confer a variety of benefits to patients on maintenance dialysis. RKF provides continuous clearance of middle molecules and protein-bound solutes. Whereas the definition of RKF varies across studies, interdialytic urine volume may emerge as a pragmatic alternative to more cumbersome ...
journal_title:Kidney international
pub_type: 杂志文章,评审
doi:10.1016/j.kint.2016.02.037
更新日期:2016-08-01 00:00:00