Serial determination of glomerular filtration rate in conscious mice using FITC-inulin clearance

2004 ◽  
Vol 286 (3) ◽  
pp. F590-F596 ◽  
Author(s):  
Zhonghua Qi ◽  
Irene Whitt ◽  
Amit Mehta ◽  
Jianping Jin ◽  
Min Zhao ◽  
...  
Keyword(s):  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Filtration Rate ◽  
Compartment Model ◽  
Inulin Clearance ◽  
Male And Female ◽  
Serial Determination ◽  
Two Compartment Model ◽  
Clearance Kinetics

Two nonradioactive methods for determining glomerular filtration rate (GFR) in conscious mice using FITC-labeled inulin (FITC-inulin) were evaluated. The first method measured GFR using clearance kinetics of plasma FITC-inulin after a single bolus injection. Based on a two-compartment model, estimated GFR was 236.69 ± 16.55 and 140.20 ± 22.27 μl/min in male and female C57BL/6J mice, respectively. Total or ⅚ nephrectomy reduced inulin clearance to 0 or 32.80 ± 9.32 μl/min, respectively. Conversely, diabetes mellitus induced by streptozotocin was associated with increased GFR. The other approach measured urinary inulin clearance using intraperitoneal microosmotic pumps to deliver FITC-inulin and metabolic cages to collect timed urine samples. This approach yielded similar GFR values of 211.11 ± 26.56 and 157.36 ± 20.02 μl/min in male and female mice, respectively. These studies demonstrate the feasibility of repeated nonisotopic measurement of inulin clearance in conscious mice.

125I-Sodium Iothalamate in the Determination of the Glomerular Filtration Rate

1967 ◽  
Vol 06 (03) ◽  
pp. 204-310
Author(s):  
B. Malamos ◽  
A. S. Dontas ◽  
D. A. Koutras ◽  
S. Marketos ◽  
J. Sfontouris ◽  
...  
Keyword(s):  
Glomerular Filtration Rate ◽  
Clinical Practice ◽  
Creatinine Clearance ◽  
Glomerular Filtration ◽  
Filtration Rate ◽  
Close Correlation ◽  
Inulin Clearance ◽  
Endogenous Creatinine Clearance ◽  
The Mean

SummaryOne hundred 125I-sodium iothalamate and endogenous creatinine clearances in 36 subjects were compared with standard inulin clearance measurements. There was a very close correlation of the urine/plasma ratios between any two of the three clearances studied, hence both labelled iothalamate and creatinine can be relied upon for the estimation of the glomerular filtration rate in clinical practice. The mean ratio of 125I-sodium iothalamate to inulin clearance was 1.01 and that of creatinine to inulin 1.03. It is concluded that the clearance of 125I-sodium iothalamate can be substituted for the clearance of inulin in clinical determinations of the glomerular filtration rate but that in centres without radioisotope facilities the endogenous creatinine clearance can be used instead.

Practical Approach for Determining Glomerular Filtration Rate by Single-Injection Inulin Clearance

1992 ◽  
Vol 38 (3) ◽  
pp. 403-407 ◽  
Author(s):  
K Jung ◽  
W Henke ◽  
B D Schulze ◽  
K Sydow ◽  
K Precht ◽  
...  
Keyword(s):  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Filtration Rate ◽  
Bolus Injection ◽  
Single Injection ◽  
Compartment Model ◽  
Inulin Clearance ◽  
Analytical Sensitivity ◽  
Blood Samples ◽  
Isotope Technique

Abstract We compared the glomerular filtration rate as measured by a single-injection inulin clearance with that measured by a standard isotope method with 99mTc-labeled diethylenetriaminopentaacetic acid in 21 subjects with glomerular filtration rates greater than 35 mL/min. After a bolus injection of 5 g of inulin, blood samples were taken 20, 45, 90, 120, 145, 180, and 240 min afterwards. Inulin was measured by optimized chemical or enzymatic methods of high analytical sensitivity to determine inulin at low concentrations. We used the one-compartment model and inulin concentrations measured at two sampling times to calculate the glomerular filtration rate from the data of the disappearance curve of inulin. Inulin concentrations at 20 and 240 min after injection of the inulin bolus were suited to estimate glomerular filtration rate by this procedure, resulting in values (y) comparable with those obtained by isotope technique (x). The relationship to the isotope technique was characterized by the equation y = +4.80 mL/min + 0.92x (r = 0.97). The single-injection inulin clearance determination can detect a decrease of glomerular filtration rate at the beginning of kidney damage, given that our study included subjects with glomerular filtration rates greater than 35 mL/min. We conclude that the glomerular filtration rate can be determined by analyzing only two blood samples after a bolus injection of inulin.

Simultaneous Urography and Determination of Glomerular Filtration Rate

1994 ◽  
Vol 35 (4) ◽  
pp. 391-395
Author(s):  
S. Lundqvist ◽  
S. -O. Hietala ◽  
C. Berglund ◽  
K. Karp
Keyword(s):  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Filtration Rate

Renal glomerular filtration rate and hepatic blood flow during voluntary diving in Weddell seals

1983 ◽  
Vol 245 (5) ◽  
pp. R743-R748 ◽  
Author(s):  
R. W. Davis ◽  
M. A. Castellini ◽  
G. L. Kooyman ◽  
R. Maue
Keyword(s):  
Blood Flow ◽  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Hepatic Blood Flow ◽  
Filtration Rate ◽  
Hepatic Function ◽  
Inulin Clearance ◽  
Weddell Seals ◽  
Icg Clearance ◽  
The Mean

Renal and hepatic function were studied during voluntary dives in Weddell seals by measuring the clearance rate of inulin and indocyanine green (ICG). Inulin is cleared exclusively by the kidneys and measures renal glomerular filtration rate (GFR). ICG is cleared by the liver and is blood flow dependent at concentrations used. Studies were conducted from a portable hut with a trapdoor placed over an isolated hole in the sea ice near McMurdo Station, Antarctica. An intravertebral extradural catheter was inserted percutaneously under light anesthesia in subadult seals weighing 130-200 kg. When released into the ice hole, the seals made voluntary dives, but always had to return to breathe. Serial blood samples were taken after single injections of inulin and ICG and analyzed within 24 h. The mean half time (t 1/2) for inulin clearance while resting at the surface was 27.3 +/- 13.0 min (n = 43) and the mean t 1/2 for ICG clearance was 18.3 +/- 7.3 min (n = 23). The mean resting GFR was 3.6 ml X min-1 X kg-1 (range 3.2-3.9, n = 3). Inulin and ICG clearance rates did not change from resting levels during dives shorter than the seal's aerobic dive limit (ADL). Inulin clearance decreased over 90% during dives longer than the ADL, but there was no significant reduction in ICG clearance during dives lasting up to 23 min. It appears that normal renal GFR and hepatic blood flow continue during natural aerobic dives. During dives that exceed the ADL, GFR is reduced but hepatic blood flow may be maintained.

Effects of growth hormone and IGF-I on renal function in rats with normal and reduced renal mass

1990 ◽  
Vol 259 (5) ◽  
pp. F747-F751 ◽  
Author(s):  
S. B. Miller ◽  
V. A. Hansen ◽  
M. R. Hammerman
Keyword(s):  
Growth Hormone ◽  
Renal Function ◽  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Renal Mass ◽  
Filtration Rate ◽  
Inulin Clearance ◽  
Mass Reduction ◽  
Contralateral Kidney ◽  
Igf I

To characterize actions of growth hormone (GH) and insulin-like growth factor ( (IGF-I) on renal function in rats with normal and reduced renal mass, we administered recombinant bovine growth hormone (bGH) or human IGF-I (hIGF-I) to normal rats or to rats that had undergone unilateral nephrectomy and two-thirds infarction of the contralateral kidney, and measured inulin and p-aminohippurate clearances over 10-17 days. Administration of either bGH (100-200 micrograms/day) or hIGF-I (200 micrograms/day) to rats with normal renal mass increased inulin and p-aminohippurate clearances compared with those measured in animals that received vehicle. Filtration fractions were not affected by either bGH or hIGF-I. Inulin clearance was decreased to approximately 17% of normal 1 day after reduction of renal mass in rats. Over the next 3 days insulin clearance increased significantly in rats with reduced renal mass that were administered vehicle. No further enhancement occurred during the next 7 days. Neither bGH nor hIGF-I affected inulin clearance in rats with reduced renal mass. We conclude that both GH and IGF-I enhance glomerular filtration rate when administered to rats with normal renal mass, but not when administered in the same quantities to rats in which renal functional mass is reduced. Glomerular filtration rate increases within 4 days of renal mass reduction independent of exogenous GH or IGF-I.

scholarly journals A New Biochemical Marker For Determination of Glomerular Filtration Rate in Pediatrics Renal Diseases

GEGET ◽  
2002 ◽  
Vol 2 (1) ◽  
pp. 15-23
Author(s):  
Mervat Hesham ◽  
Zeinab Dosouky ◽  
Doaa Tawfeek ◽  
Somayya Abd-Alla
Keyword(s):  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
Filtration Rate ◽  
Biochemical Marker ◽  
Renal Diseases
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