Distribution of 5′-nucleotidase in the renal interstitium of the rat

1989 ◽  
Vol 258 (1) ◽  
pp. 177-182 ◽  
Author(s):  
Michel Le Hir ◽  
Brigitte Kaissling
Keyword(s):  
Renal Interstitium

scholarly journals Elevated Endostatin Expression Is Regulated by the pIgA Immune Complex and Associated with Disease Severity of IgA Nephropathy

2020 ◽  
pp. 1-13
Author(s):  
Yaling Zhai ◽  
Xiaoqing Long ◽  
Jingge Gao ◽  
Xingchen Yao ◽  
Xinnian Wang ◽  
...  
Keyword(s):  
Iga Nephropathy ◽  
Disease Severity ◽  
Immune Complex ◽  
Poor Prognosis ◽  
High Serum ◽  
Endothelial Cell Proliferation ◽  
Renal Interstitium ◽  
Before And After ◽  
Poor Outcomes

<b><i>Background/Aims:</i></b> Renal vascular injury accounts for the poor outcomes of patients with IgA nephropathy (IgAN). In this study, we investigated whether endostatin, a potent inhibitor of angiogenesis, is associated with IgAN. <b><i>Methods:</i></b> Serum endostatin levels were detected in patients with IgAN, disease controls, and healthy controls, and the correlation among endostatin and clinicopathologic manifestations, as well as prognosis in patients with IgAN, was analyzed. In addition, serum endostatin levels were compared in patients “before” and “after” treatment. Data on endostatin expression in the renal interstitium of patients with IgAN were downloaded and analyzed from the GSE35489 array in the GEO database. The poly-IgA1 (pIgA) immune complex is widely recognized as the “trigger” of IgAN initiation. pIgA in the plasma of patients was extracted and used to stimulate human glomerular endothelial cells (GECs). Endostatin, IL-6, and CXCL1 in the cell supernatant were detected by ELISA kits. <b><i>Results:</i></b> We found that serum endostatin levels were significantly increased in patients with IgAN, as was endostatin expression in the renal interstitium. Patients with IgAN were divided into 2 groups according to the median value. The high endostatin expression group had significantly higher levels of serum creatinine and BUN and more severe tubular/interstitial damage. Moreover, patients with arteriolar injury and endothelial cell proliferation had higher serum endostatin levels. Patients with high serum endostatin levels had poor prognosis. According to the in vitro experiment, the GEC apoptosis rate and the supernatant levels of endostatin, IL-6, and CXCL1 were significantly increased following pIgA stimulation. <b><i>Conclusion:</i></b> Our study found that elevated endostatin expression was associated with disease severity and poor prognosis in patients with IgAN and can be upregulated by pIgA, but how it participates in the pathogenesis of IgAN deserves further exploration.

scholarly journals The pathological features of leukemic cells infiltrating the renal interstitium in chronic lymphocytic leukemia/small lymphocytic lymphoma from a large single Chinese center

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Hui Wang ◽  
Xiaojuan Yu ◽  
Xu Zhang ◽  
Suxia Wang ◽  
Minghui Zhao
Keyword(s):  
Electron Microscopy ◽  
Chronic Lymphocytic Leukemia ◽  
Renal Injury ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Cell Infiltration ◽  
Small Lymphocytic Lymphoma ◽  
Tubulointerstitial Injury ◽  
Renal Interstitium ◽  
Monoclonal Immunoglobulins

Abstract Background Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) is rare in Asians, and patients with CLL/SLL seldomly undergo kidney biopsy. The histopathological features and clinical relevance of tubulointerstitial injury in CLL/SLL have not been extensively characterized. Hence, we attempted to describe the clinical characteristics, renal pathology and clinical outcome of a well-characterized population of CLL/SLL patients with CLL cell infiltration in the renal interstitium from a large single center in China. Methods Between January 1st, 2010 and September 31st, 2020, 31946renal biopsies were performed at Peking University First Hospital, and 10 CLL/SLL patients with CLL cell infiltration in the renal interstitium were included. Complete clinical data were collected from these 10 patients, and renal specimens were examined by routine light microscopy, immunofluorescence and electron microscopy. Results The extent of the infiltrating CLL cells in patients with CLL/SLL varied among different patients and ranged from 10 to 90% of kidney parenchyma. Six (60%) of 10 patients presented with an extent of infiltrating CLL cells ≥50%. Interestingly, we found that three patients (3/10, 30%) expressed monoclonal immunoglobulins in the infiltrating CLL cells, and special cytoplasmic crystalline structures were found in two of the three patients by electron microscopy for the first time. Severe renal insufficiency (Scr ≥200 μmol/L) was associated with ≥50% interstitial infiltration of CLL cells in the renal interstitium. Conclusions The current study confirmed that CLL cells infiltrating the renal interstitium can directly secrete monoclonal immunoglobulins, indicating that the interstitial infiltrating CLL cells possibly cause renal injury directly by secreting monoclonal immunoglobulins in situ. This finding may prove a new clue to elucidate the pathogenetic mechanism of renal injury involved with CLL/SLL.

scholarly journals Hemoglobin Levels in Type 2 Diabetes Mellitus Patients

2021 ◽  
Vol 3 (1) ◽  
pp. 24-29
Author(s):  
Wahyu Anita Khoirin ◽  
Rodhi Hartono
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Diabetic Nephropathy ◽  
Medical Records ◽  
Renal Interstitium ◽  
Chronic Hyperglycemia ◽  
Hypoxic Environment ◽  
Age Category

Type 2 diabetes mellitus with chronic hyperglycemia can cause a hypoxic environment in the renal interstitium and can cause kidney disorders (diabetic nephropathy), this can lead to decreased kidney function and the production of erythropoietin produced by peritubular fibroblasts is disrupted, and hemoglobin is not formed optimally and occurs anemia. Thei purposei ofi thisi studyi wasi toi determinei hemoglobini levelsi in patients withi typei 2i diabetesi mellitusi in RSUD. K.R.M.T Wongsonegoro Semarang. This is a descriptive quantitative study, the data comes from the medical records of patients with typei 2i diabetesi mellitusi withi complicationsi ofi diabetici nephropathyi at RSUD K.R.M.T Wongsonegoro Semarang as many as 40 samples with non-probability samplingi itechnique. The results showed that there were 20 men who had decreased hemoglobin levels and 1 person who had normal hemoglobin levels. Meanwhile, in women, 17 people had decreased hemoglobin levels and 2 people had normal hemoglobin levels. Based on the age category, the most were the early elderly as many as 15 people and the least in the late teens and early adults each as many as 2 people. Meanwhile, based on the average level of anemia, more experienced moderate levels of anemia. Hemoglobin levels in patients with type. 2i. diabetesi. mellitusi. withi. complicationsi. ofi. diabetici. nephropathyi. at RSUD K.R.M.T Wongsonegoro Semarang were 40 samples, on average they had low hemoglobin levels.

scholarly journals Physiology of the Renal Interstitium

2015 ◽  
Vol 10 (10) ◽  
pp. 1831-1840 ◽  
Author(s):  
Michael Zeisberg ◽  
Raghu Kalluri
Keyword(s):  
Renal Interstitium

Renal interstitial pressure in mineralocorticoid escape

1985 ◽  
Vol 249 (3) ◽  
pp. F396-F399 ◽  
Author(s):  
J. C. Burnett ◽  
J. A. Haas ◽  
M. S. Larson
Keyword(s):  
Blood Flow ◽  
Glomerular Filtration Rate ◽  
Hydrostatic Pressure ◽  
Arterial Pressure ◽  
Filtration Rate ◽  
Interstitial Pressure ◽  
Peritubular Capillary ◽  
Renal Interstitium ◽  
Vasa Recta ◽  
Peritubular Capillaries

Studies were performed in normal and DOCA-treated rats to determine renal hydrostatic pressures within superficial peritubular capillaries, the vasa recta, and renal interstitium during mineralocorticoid escape to test the hypothesis that mineralocorticoid escape is associated with elevated renal interstitial hydrostatic pressure. Fractional sodium excretion was greater in the DOCA-treated rats (3.20 +/- 0.51%) compared with control rats (1.23 +/- 0.12%) with no difference in glomerular filtration rate and renal blood flow between the two groups. Superficial peritubular capillary hydrostatic pressure (13.4 +/- 0.6 vs. 8.3 +/- 0.3 mmHg), vasa recta hydrostatic pressure (13.8 +/- 0.5 vs. 9.0 +/- 0.4 mmHg), renal interstitial hydrostatic pressure (9.8 +/- 0.4 vs. 4.5 +/- 0.4 mmHg), and arterial pressure (145 +/- 6 vs. 120 +/- 7 mmHg) were greater in the DOCA-treated compared with the control rats. These studies establish that mineralocorticoid escape is characterized by high renal interstitial hydrostatic pressure.

Direct renal interstitial volume expansion causes exaggerated natriuresis in SHR

1991 ◽  
Vol 261 (4) ◽  
pp. F567-F570 ◽  
Author(s):  
A. A. Khraibi
Keyword(s):  
Volume Expansion ◽  
Fractional Excretion ◽  
Urinary Sodium Excretion ◽  
Renal Interstitium ◽  
Time Control ◽  
Arterial Blood ◽  
Interstitial Volume ◽  
Fractional Excretion Of Sodium ◽  
Wistar Kyoto ◽  
Second Period

In Okamoto spontaneously hypertensive rats (SHR), elevated arterial blood pressure is not transmitted to the renal interstitium, and therefore pressure natriuretic and diuretic responses are attenuated. The objective of this study was to determine the effect of increasing renal interstitial hydrostatic pressure (RIHP) by direct renal interstitial volume expansion (DRIVE) on natriuresis and diuresis of SHR and Wistar-Kyoto rats (WKY). Unilateral nephrectomy and implantation of two polyethylene (PE) matrices were performed 3-4 wk before the acute experiment. Four groups of rats, two experimental and two time control, were used. A control clearance period was taken in all groups. In experimental groups and at the beginning and middle of the second period DRIVE was accomplished by bolus injection of a solution of 2.5% human albumin in saline directly into interstitium through one of the PE matrices. In time-control groups saline was infused in renal interstitium at the beginning of the second period. The second PE matrix was used to continuously measure RIHP in all groups. In experimental groups, DRIVE produced a significant increase in RIHP from 3.8 +/- 0.4 to 5.7 +/- 0.8 mmHg (P less than 0.05) in SHR and 4.3 +/- 0.4 to 7.1 +/- 0.5 mmHg (P less than 0.05) in WKY. In both groups the significant increase in RIHP was associated with significant increases in urinary sodium excretion (UNaV), fractional excretion of sodium (FENa), and urine flow rate (V).(ABSTRACT TRUNCATED AT 250 WORDS)

Effect of renal interstitial infusion of arachidonic acid on proximal sodium reabsorption

1989 ◽  
Vol 257 (2) ◽  
pp. F237-F242 ◽  
Author(s):  
Y. Kinoshita ◽  
J. C. Romero ◽  
F. G. Knox
Keyword(s):  
Arachidonic Acid ◽  
Urinary Excretion ◽  
Proximal Tubules ◽  
Sodium Reabsorption ◽  
Renal Interstitium ◽  
Tubular Sodium Reabsorption ◽  
Proximal Tubular ◽  
The Individual ◽  
Stimulation Of ◽  
Interstitial Infusion

The effect of prostaglandins (PGs) on proximal sodium reabsorption has not been fully defined. The objective of the present study was to determine the response of proximal tubular sodium reabsorption to infusions of arachidonic acid and specific PGs into the renal interstitium in rats. Renal interstitial infusions of arachidonic acid as well as the individual PGs, I2, E2, and F2 alpha, were employed to elevate the concentration of these PGs in the kidney. Infusion of 10(-4) M arachidonic acid elicited a marked increase of urinary excretion of 6-keto-PGF1 alpha (a stable metabolite of PGI2) from 260.1 +/- 52.7 to 507.4 +/- 129.5 pg/min (P less than 0.05) and a smaller increase of PGE2 from 18.4 +/- 11.2 to 25.9 +/- 10.9 pg/min (P less than 0.05). When micropuncture samples were obtained from superficial late proximal tubules, infusion of arachidonic acid increased the fractional delivery of sodium (FDNa) from 47.8 +/- 5.9 to 58.3 +/- 4.6% (n = 6, P less than 0.01). In the presence of indomethacin, arachidonic acid failed to augment FDNa. Infusion of 10(-5) M PGI2 also increased FDNa from 51.4 +/- 3.4 to 64.0 +/- 4.4% (n = 10, P less than 0.01). PGF2 alpha did not change FDNa and PGE2 decreased it from 53.1 +/- 5.4 to 37.4 +/- 3.3% (n = 8, P less than 0.01). In summary, the present study demonstrates that renal interstitial infusion of arachidonic acid decreases sodium reabsorption by the superficial proximal tubules possibly through the stimulation of PGI2 production.

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