Abstract:
:Tubular function studies have shown that nephrectomy leads to a sharp increase in potassium secretion by initial collecting tubules. The aim of this study was to examine the relationship between potassium transport and the cellular morphology of the distal nephron. Clearance and ultrastructural studies were conducted in rats 10 days after 75% nephrectomy. Fractional urinary potassium excretion increased from 23.4 +/- 3.8% in controls to 63.9 +/- 10.1% in nephrectomized animals. Stereological analysis of principal cells in the initial collecting tubule revealed that following nephrectomy the surface density of the basolateral membrane increased from 2.32 +/- 0.12 to 4.11 +/- 0.20 micron2/micron3. While the basolateral membrane surface density of intercalated cells in this segment was not affected by nephrectomy, the luminal membrane surface density increased from 0.29 +/- 0.03 to 0.54 +/- 0.08 micron2/micron3. Ultrastructural changes were not observed in cells of the distal convoluted tubule. These observations demonstrate that cell type specific changes in membrane surface density accompany the adaptive increase in ion transport that occurs with a reduction in renal mass. The enhanced potassium excretion associated with nephrectomy may be partly mediated by a specific increase in the basolateral membrane of principal cells. The increase in luminal membrane of intercalated cells may be related to the increase in acid transport per surviving nephron following nephrectomy.
journal_name
Kidney Intjournal_title
Kidney internationalauthors
Zalups RK,Stanton BA,Wade JB,Giebisch Gdoi
10.1038/ki.1985.58subject
Has Abstractpub_date
1985-04-01 00:00:00pages
636-42issue
4eissn
0085-2538issn
1523-1755pii
S0085-2538(15)33405-0journal_volume
27pub_type
杂志文章abstract::A model of glomerular dynamics has been developed by using network thermodynamics and the SPICE 2 computer program to further explore the determinants of glomerular filtration. The model is designed to be holistic and self-adjusting, taking cognizance of and permitting quantitation of the secondary alterations in indi...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1981.27
更新日期:1981-02-01 00:00:00
abstract::Class II gene products of the major histocompatibility complex (MHC) are not expressed usually in abundance on normal epithelium. The cell surface visibility of such proteins for the immune system is thought to be limited protectively in order to minimize inflammation consequent to the recognition of self-antigens in ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1991.191
更新日期:1991-07-01 00:00:00
abstract::Hemodynamic pressure in glomerular capillaries (GCP) and in first order peritubular capillaries (EAP) in superficial nephrons of mutant Wistar rats with surface glomeruli was measured by micropuncture with a servo-nulling device in the following conditions: 1) control;2) norepinephrine infusion (NE); 3) epinephrine in...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1976.61
更新日期:1976-06-01 00:00:00
abstract::Anthropometric measurements and circulating growth factors were studied serially in 44 prepubertal children with growth failure and chronic renal failure (GFR = 10 to 40 ml/min/1.73 m2) who were randomized to receive either recombinant human growth hormone (rhGH; N = 30) or no treatment (N = 14). RhGH was given as Nut...
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.1997.268
更新日期:1997-06-01 00:00:00
abstract::We examined the circulating levels of the proinflammatory cytokines tumor necrosis factor-alpha (TNF-alpha), interleukin (IL)-1 alpha, IL-6, granulocyte macrophage-colony stimulating factor (GM-CSF), and the anti-inflammatory cytokine IL-10, and their expression in kidneys acutely infected with murine malaria parasite...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1111/j.1523-1755.1998.00848.x
更新日期:1998-04-01 00:00:00
abstract:BACKGROUND:Cardiovascular death continues to be a major problem in renal failure. Structural abnormalities of the heart and the vasculature contribute to the increased cardiovascular risk. They are ameliorated by angiotensin-converting enzyme (ACE) inhibitors, but because of the nonspecifity of ACE inhibition, it is un...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2000.00163.x
更新日期:2000-07-01 00:00:00
abstract::Spontaneous polycystic kidney and liver disease in an inbred herd of Springbok (Antidorcas marsupialis) was studied by light microscopy, transmission electron microscopy, and microdissection. Springbok are a small species of gazelle of the family Bovidae native to South Africa. Since 1976, 18% of all live calves born ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1982.146
更新日期:1982-08-01 00:00:00
abstract::In uremic patients resistance to the action of insulin has been documented, but it is not known at what stage of renal disease it appears. We therefore examined 29 patients with IgA glomerulonephritis (IgAGN) and 21 patients with adult polycystic kidney disease (ADPKD) in different stages of renal failure, and in addi...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.1998.00898.x
更新日期:1998-05-01 00:00:00
abstract::It is known that in rodents recombinant human growth hormone (rhGH) and recombinant human insulin-like growth factor (rhIGF-1) increase renal mass. It is uncertain, however, whether renal mass increases in proportion to body growth, or whether renal growth is stimulated selectively. In 120 to 150 g female Sprague-Dawl...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1993.376
更新日期:1993-12-01 00:00:00
abstract:BACKGROUND:1,25-Dihydroxyvitamin D3 [1,25(OH)2D3], the active form of vitamin D3, is a potent immunomodulatory agent on several cell types such as monocytes and mesangial cells. Recruitment of inflammatory cells, as well as stimulation of resident cells and mesangial matrix accumulation are key features of various expe...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2001.00775.x
更新日期:2001-07-01 00:00:00
abstract::Indomethacin has been used to lower proteinuria in human glomerular diseases with controversial results. The mechanism of indomethacin beneficial effects has not been established. A possible explanation is that indomethacin reduces proteinuria by inhibiting the synthesis of renal prostaglandins (PGs); however, appropr...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1987.147
更新日期:1987-06-01 00:00:00
abstract::A new study in dialysis patients demonstrates that more than one-third of rehospitalizations within 30 days of discharge occur within the first week, and these rehospitalizations are associated with worse survival. Imposing a penalty on the dialysis provider for these rehospitalizations, as mandated by the Hospital Re...
journal_title:Kidney international
pub_type: 评论,杂志文章
doi:10.1016/j.kint.2017.04.046
更新日期:2017-10-01 00:00:00
abstract::Cystinuria is a common inherited aminoaciduria that leads to recurrent cystine nephrolithiasis. Mutations in a gene encoding a renal amino acid transporter (SLC3A1) have been identified in patients with cystinuria establishing one molecular cause for the disease. To facilitate systematic screening of this gene for mut...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1997.258
更新日期:1997-06-01 00:00:00
abstract::More than two isoforms have been identified for angiotensin receptors based on their ligand selectivity. The objective of this study is to determine the molecular structure of angiotensin type 2 receptor (AT2), whose physiological functions are still an enigma despite extensive studies on its distribution in fetal tis...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1994.430
更新日期:1994-12-01 00:00:00
abstract::Leukocytes play a major role in the development and progression of autoimmune diseases. We measured gene expression differences in leukocytes from patients that were antineutrophil cytoplasmic autoantibody (ANCA) positive, patients with systemic lupus erythematosus (SLE) or rheumatoid arthritis (RA), and healthy donor...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/sj.ki.5002371
更新日期:2007-10-01 00:00:00
abstract::Innate lymphoid cells are a recently recognized group of immune cells with critical roles in tissue homeostasis and inflammation. Regulatory innate lymphoid cells are a newly identified subset of innate lymphoid cells, which play a suppressive role in the innate immune response, favoring the resolution of intestinal i...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1016/j.kint.2019.07.019
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Recent advances enable the direct measurement of small molecule clearance, Kecn, during each dialysis. Average Kecn and treatment length, t, are multiplied giving total clearance, Kt. The body surface area (BSA) is a fixed transformation of height and weight and is a well recognized measure of body size. Thi...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1111/j.1523-1755.2005.00533.x
更新日期:2005-09-01 00:00:00
abstract::The inner medullary collecting duct (IMCD) is a major target site of atrial natriuretic peptide (ANP) for diuresis and natriuresis, and it is in a hypertonic condition made by the renal countercurrent multiplication system. We investigated the effects of hyperosmolality on ANP-stimulated cGMP generation in IMCD and gl...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1994.178
更新日期:1994-05-01 00:00:00
abstract::To maintain nitrogen equilibrium when prescribed a low protein diet (LPD), metabolic adaptations occur involving a reduction protein turnover, principally decreased muscle protein degradation. Studies suggest that in patients with chronic renal failure (CRF) uncomplicated by metabolic acidosis (MA), these adaptive res...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1991.275
更新日期:1991-10-01 00:00:00
abstract:UNLABELLED:Expression of apoptosis regulatory genes in chronic cyclosporine nephrotoxicity favors apoptosis. BACKGROUND:Chronic cyclosporine (CsA) nephrotoxicity is characterized by interstitial fibrosis, tubular dropout, and loss of cellularity in areas of fibrosis. Apoptosis was found to play a role in CsA-induced f...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.1999.00794.x
更新日期:1999-12-01 00:00:00
abstract::Long-term treatment (8 and 13 weeks) of rats with FGF-2 led to albuminuria and to increase in serum creatinine indicating the development of chronic renal failure. Histologically, the classic picture of focal segmental glomerulosclerosis (FSGS) was found; males were more severely affected than females. Among the early...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1995.433
更新日期:1995-11-01 00:00:00
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:BACKGROUND:This study examined the effects of stent placement for renal artery stenosis on the function of treated and contralateral kidneys. METHODS:Eighteen patients who underwent stent placement for unilateral renal artery stenosis presenting with hypertension and/or renal failure were studied before angiography an...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2002.00456.x
更新日期:2002-08-01 00:00:00
abstract:BACKGROUND:Various gene transfer vectors as well as delivery systems have been developed; however, many problems remain to be solved. We already achieved a technique to introduce genes into glomerular mesangial cells by hemagglutinating virus of Japan (HVJ) liposome-mediated gene transfer via renal artery. The main lim...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2001.0590041390.x
更新日期:2001-04-01 00:00:00
abstract::Mutations in the complement regulatory proteins are associated with several different diseases. Although these mutations cause dysregulated alternative pathway activation throughout the body, the kidneys are the most common site of injury. The susceptibility of the kidney to alternative pathway-mediated injury may be ...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1016/j.kint.2016.02.036
更新日期:2016-07-01 00:00:00
abstract::To determine whether acute renal failure (ARF) increases the long-term risk of progressive chronic kidney disease (CKD), we studied the outcome of patients whose initial kidney function was normal or near normal but who had an episode of dialysis-requiring ARF and did not develop end-stage renal disease within 30 days...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.2009.289
更新日期:2009-10-01 00:00:00
abstract:BACKGROUND:To identify susceptibility genes for diabetic nephropathy, GeneChip Expression Analysis was employed to survey the gene expression profile of diabetic KK/Ta mouse kidneys. METHODS:Kidneys from three KK/Ta and two BALB/c mice at 20 weeks of age were dissected. Total RNA was extracted and labeled for hybridiz...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1046/j.1523-1755.2003.00312.x
更新日期:2003-12-01 00:00:00
abstract::The current study was undertaken to examine the effects of dithiothreitol (DDT), a sulfhydryl-reducing agent and heavy metal chelator, on the course of heavy metal-induced acute renal failure in the rat. Groups of rats in metabolic cages received uranyl nitrate (UN) alone, UN plus DTT, mercuric chloride (HgCl2) alone,...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1977.88
更新日期:1977-08-01 00:00:00
abstract::A high frequency (25%) of anti-hepatitis C virus (HCV) antibodies is observed in French hemodialyzed patients; this is associated with detectable viremia in 85% and results in chronic hepatitis in more than 90%. We conducted a pilot study to examine the tolerance and efficacy of alpha-2b Interferon therapy upon HCV in...
journal_title:Kidney international
pub_type: 杂志文章
doi:10.1038/ki.1995.198
更新日期:1995-05-01 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