Abstract：
:Substrate oxidation was assessed by measuring 14CO2 production from 14C-labeled substrates in proximal convoluted tubules (PCT), medullary (MTAL), and cortical (CTAL) thick ascending limb of Henle, nephron segments rich in mitochondria and characterized by active solute transport. PCT, MTAL, and CTAL were dissected from the outer cortex, outer medulla, and the medullary rays of the cortex, respectively, of collagenase-treated rat kidney slices. Tubules were incubated at 37 degrees C in 150 microliters of Krebs-Ringer-bicarbonate buffer (pH, 7.4) with 14C-labeled substrate. 14CO2 production was linear up to 4 and 2 hours in PCT and MTAL, respectively. Freeze-thawing of the tubules markedly decreased 14CO2 production, and the addition of cyanide completely abolished it. The PCT demonstrated marked 14CO2 production from labeled succinate, 2-oxoglutarate, glutamate, glutamine, and malate (approximately 10 to 45 pmoles/mm/hr) and moderate 14CO/ production from citrate (approximately 3 pmoles/ml/hr). Little 14CO2 was released from labeled glucose and lactate in PCT. These results are consistent with the existence of gluconeogenesis in this nephron segment. By contrast, MTAL and CTAL oxidized glucose, 2-oxoglutarate, lactate, glutamate, and glutamine, but not malate, succinate, and citrate. The pentose shunt pathway accounted for approximately half of the 14CO2 produced from 1-14C glucose in MTAL and CTAL. Palmitate oxidation occurred in MTAL and CTAL but minimally in PCT. The results demonstrate a distinct pattern of substrate oxidation in PCT, MTAL, and CTAL where oxidative metabolism is critical to support active solute transport.
journal_name
Kidney Intjournal_title
Kidney internationalauthors
Klein KL,Wang MS,Torikai S,Davidson WD,Kurokawa Kdoi
10.1038/ki.1981.100subject
Has Abstractpub_date
1981-07-01 00:00:00pages
29-35issue
1eissn
0085-2538issn
1523-1755pii
S0085-2538(15)32514-Xjournal_volume
20pub_type
杂志文章abstract：:Experiments in rodents have demonstrated an important role for selectins in kidney ischemia-reperfusion injury (IRI). However, the relevance of this in larger mammals, as well as the impact on long-term structure and function is unknown. We tested the hypothesis that small molecule selectin ligand inhibition attenuate...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/sj.ki.5000335
更新日期：2006-05-01 00:00:00
abstract：:Renal stone disease, which affects 12% of males and 5% of females by the seventh decade, occurs as an inherited disorder in 45% of patients and is most commonly associated with hypercalciuria. The biochemical basis for hereditary nephrolithiasis and hypercalciuria is unknown, and this has therefore been investigated b...
journal_title：Kidney international
pub_type： 杂志文章,评审
doi：10.1046/j.1523-1755.2000.00916.x
更新日期：2000-03-01 00:00:00
abstract：:Stimulation of proximal tubule cell (PTC) growth in a variety of physiological and pathological renal conditions is preceded by increased renal production of transforming growth factor-beta 1 (TGF-beta 1) and by augmented tubular sodium transport via activated sodium hydrogen exchange (NHE). Since TGF-beta 1 has been ...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1046/j.1523-1755.1998.00916.x
更新日期：1998-06-01 00:00:00
abstract：:Studies were performed in anesthetized dogs (N = 7) to determine the effects of synthetic atrial natriuretic peptide (ANP) on sodium excretion in the presence and absence of control of glomerular filtration rate produced by suprarenal aortic clamping. Intrarenal infusion of synthetic atrial natriuretic peptide (0.3 mi...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.1986.144
更新日期：1986-07-01 00:00:00
abstract：:Polycystic renal disease was induced in rats by feeding 2-amino-4,5-diphenylthiazole. Tubular (TBM) and glomerular basement membranes (GBM) were purified and analyzed for possible structural changes that may be a factor in the development of the tubular dilations and cysts. Changes in the relative quantities of TBM po...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.1985.193
更新日期：1985-11-01 00:00:00
abstract：BACKGROUND:Small, uncontrolled studies of dialysis-dependent chronic kidney disease (CKD) patients have demonstrated abnormalities of cardiovascular autonomic control and vascular compliance, which may contribute to adverse cardiovascular morbidity in this population. However, there is little information utilizing newe...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1111/j.1523-1755.2005.00165.x
更新日期：2005-03-01 00:00:00
abstract：:Acute kidney injury (AKI) following cardiac surgery is closely interrelated with hemodynamic instability and sympathetic activity, and adversely influences prognosis. Here, we investigated in a randomized placebo-controlled trial whether dexmedetomidine, an α2 adrenoreceptor agonist, could prevent AKI after valvular h...
journal_title：Kidney international
pub_type： 杂志文章,随机对照试验
doi：10.1038/ki.2015.306
更新日期：2016-03-01 00:00:00
abstract：:Compelling evidence indicates that vascular endothelial growth factor (VEGF) is a fundamental regulator of normal and abnormal angiogenesis. The loss of a single VEGF allele results in defective vascularization and early embryonic lethality. VEGF plays also a critical role in kidney development, and its inactivation d...
journal_title：Kidney international
pub_type： 杂志文章,评审
doi：10.1046/j.1523-1755.1999.00610.x
更新日期：1999-09-01 00:00:00
abstract：:Fourteen subjects with persistent azotemia and normal glomerular filtration rate were studied by renal clearances and hormonal determinations to establish the nephron site of altered urea transport and the mechanism(s) responsible for their azotemia. During constant alimentary protein, urea nitrogen appearance was nor...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.1987.266
更新日期：1987-11-01 00:00:00
abstract：:Patients with chronic kidney disease (CKD) have a high risk of hyperkalemia, which increases mortality and can lead to renin-angiotensin-aldosterone system inhibitor (RAASi) dose reduction or discontinuation. Patiromer, a nonabsorbed potassium binder, has been shown to normalize serum potassium in patients with CKD an...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.2015.270
更新日期：2015-12-01 00:00:00
abstract：BACKGROUND:Prolonged antihypertensive therapy might be less effective in reversing the left ventricular hypertrophy (LVH) in uremics bearing the deleted (DD) allele of the angiotensin converting enzyme (ACE) gene than in patients with the inserted (II) allele or in those heterozygous (ID) for the gene. METHODS:Thirtee...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1046/j.1523-1755.1998.00027.x
更新日期：1998-08-01 00:00:00
abstract：:The present study was undertaken to evaluate some pathophysiological mechanisms of edema formation in diabetic nephropathy. Sixty-three subjects were investigated: 9 normal subjects (I), 9 normoalbuminuric Type 1 (insulin-dependent) diabetic patients (II), 15 microalbuminuric Type 1 diabetic patients (III), 16 Type 1 ...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.1990.332
更新日期：1990-12-01 00:00:00
abstract：:A protective role for sirtuin 6 (Sirt6) in the context of chronic renal injury is reported by Cai et al. in this issue of Kidney International. The mechanism is thought to be mediated by Sirt6's deacetylase activity, specifically on β-catenin target genes. This commentary discusses these results and the interaction be...
journal_title：Kidney international
pub_type： 评论,杂志文章
doi：10.1016/j.kint.2019.09.022
更新日期：2020-01-01 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：:Tenascin-C is an extracellular matrix glycoprotein that plays a critical role in kidney fibrosis by orchestrating a fibrogenic niche. Here, we demonstrate that tenascin-C is a biomarker and a mediator of kidney fibrogenesis by impairing tubular integrity. Tenascin-C was found to be increased in kidney biopsies from pa...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1016/j.kint.2020.01.026
更新日期：2020-05-01 00:00:00
abstract：BACKGROUND:Epidermal growth factor (EGF) plays an important role in renal tubular regeneration after ischemic injury in kidney. The present study reports the association between the renin-angiotensin system (RAS) and EGF, and the effect of angiotensin II blockade with losartan (LSRT) on EGF expression in an experimenta...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1046/j.1523-1755.2001.060003847.x
更新日期：2001-09-01 00:00:00
abstract：:Ischemia-reperfusion occurs in a great many clinical settings and contributes to organ failure or dysfunction. CD154-CD40 signaling in leukocyte-endothelial cell interactions or T-cell activation facilitates tissue inflammation and injury. Here we tested a siRNA anti-CD40 in rodent warm and cold ischemia models to che...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.2015.146
更新日期：2015-09-01 00:00:00
abstract：:Rare mutations in the LRP2 gene encoding for the endocytic receptor megalin cause developmental abnormalities and kidney disease. However, the mechanisms governing the dysfunction of mutant megalin remain unclear. A new study utilizing patient-derived induced pluripotent stem cells is now putting the endolysosomal sys...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1016/j.kint.2020.04.033
更新日期：2020-07-01 00:00:00
abstract：:Suzuki et al. analyzed a mouse model of erythropoietin-deficient anemia to show that during iron overload renal interstitial fibroblasts accumulate iron, and this impairs the hypoxia-driven transcription of the erythropoietin gene. The authors show that excess iron decreases levels of hypoxia-inducible transcription f...
journal_title：Kidney international
pub_type： 评论,杂志文章
doi：10.1016/j.kint.2018.07.027
更新日期：2018-11-01 00:00:00
abstract：:A major factor contributing to failure of arteriovenous fistulas (AVFs) is migration of smooth muscle cells into the forming neointima. To identify the source of smooth muscle cells in neointima, we created end-to-end AVFs by anastomosing the common carotid artery to the jugular vein and studied neural crest-derived s...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.2015.73
更新日期：2015-09-01 00:00:00
abstract：:Interstitial monocytic infiltration of the kidney occurs within hours of acute kidney injury and is an important determinant of functional decline and fibrosis. Li et al. used several surface markers to distinguish between dendritic cells and inflammatory monocytes following acute kidney injury and to identify two che...
journal_title：Kidney international
pub_type： 评论,杂志文章
doi：10.1038/ki.2008.555
更新日期：2008-12-01 00:00:00
abstract：:We compared growth rate, food conversion ratio and morphology of the growth zone in female Sprague-Dawley rats with subtotal nephrectomy or sham operation. Both groups were either given vehicle or 1.4 IU/day recombinant human growth hormone (GH) by s.c. osmotic minipump, or 2.5 IU twice daily intraperitoneally for 14 ...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.1988.7
更新日期：1988-01-01 00:00:00
abstract：:The role of endogenous atrial natriuretic peptide (ANP) in the immediate response of sodium excretion to unilateral nephrectomy (UNX) was investigated in anesthetized euvolemic rats through measurement of UNX-induced change in plasma ANP concentration and the response of the remaining kidney to UNX following administr...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.1993.178
更新日期：1993-06-01 00:00:00
abstract：:It is unknown whether mild chronic kidney disease (CKD) is associated with adverse cardiovascular (CV) prognosis after accounting for coronary artery disease (CAD). Here we evaluated the interplay between CKD and CAD in predicting CV death or myocardial infarction (MI) and all-cause death. We included 1541 consecutive...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.2014.426
更新日期：2015-07-01 00:00:00
abstract：BACKGROUND:A need exists for a therapy that lowers parathyroid hormone (PTH) without increasing calcium x phosphorus in patients with secondary hyperparathyroidism. The calcimimetic AMG 073 increases the sensitivity of the parathyroid calcium-sensing receptor to extracellular calcium, thereby reducing PTH secretion. Co...
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：10.1046/j.1523-1755.2003.00720.x
更新日期：2003-01-01 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：: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：:Autosomal dominant polycystic kidney disease (ADPKD) is an inherited, progressive nephropathy accounting for 4-10% of end stage renal disease worldwide. PKD1 and PKD2 are the most common disease loci, but even accounting for other genetic causes, about 7% of families remain unresolved. Typically, these unsolved cases ...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1016/j.kint.2019.08.038
更新日期：2020-02-01 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：:Leucocyte interaction with other cells is facilitated by the adhesion molecules, leucocyte function-associated antigen-1 (LFA-1)-binding to intercellular adhesion molecule-1 (ICAM-1) and for T cells and natural killer (NK) cells the binding of LFA-2 (CD2) to LFA-3. As these interactions are critical for the mediation ...
journal_title：Kidney international
pub_type： 杂志文章
doi：10.1038/ki.1989.303
更新日期：1989-12-01 00:00:00
