background beta-2 microglobulin (b2m) is considered as a surrogate marker for middle molecule uremic toxins and a key component in dialysis-related amyloidosis. however, few studies have evaluated role of b2m in patients with chronic kidney disease (ckd). objectives the purpose of this study was to evaluate the association of plasma b2m level with some metabolic and cardiac performance factors ...

In order to study renal salt-retaining mechanisms during the early stages of ascites formation, rats were subjected to bile duct ligation. After this procedure, plasma volumes were found to be reduced and hematocrits slightly increased. The whole-kidney glomberular filtration rate and plasma flows were reduced to 59 and 57% of control values, but the filtration fraction was unchanged. Absolute ...

Plasma lipoproteins were selectively removed from familial hypercholesterolemic patients by using two types of plasmapheresis: double-membrane filtration and selective adsorption of very low density lipoproteins (VLDL) and low density lipoproteins (LDL). In both techniques, plasma was separated from blood cells by using hollow-fiber filters, and 100% of the VLDL and LDL was recovered in the fil...

To determine the physiological basis for the low glomerular filtration rate in chronic malnutrition, micropuncture studies were performed in Munich-Wistar rats chronically pair-fed isocaloric diets of either low (group 1, nine rats) or high protein content (group 2, nine rats). Despite the absence of hypoalbuminemia, average values for single nephron and total kidney glomerular filtration rate ...

Kidney structure and function: When studying any organ system, it is important to recognize the difference between the job of that organ and the mechanism used to accomplish that job. The job of the kidney is to regulate the volume and composition of the body’s fluid compartments (in particular the extracellular fluid, ECF). The mechanism used to accomplish this job is a filtration/reabsorption...

The present study was designed to examine the short-term and long-term effects of increased plasma levels of atrial natriuretic peptide on the glomerular filtration rate, sodium excretion, and arterial pressure. Intravenous infusion of synthetic atrial natriuretic peptide (2 micrograms/kg/bolus, 50 ng/kg/min continuous infusion) for 45 minutes in six conscious dogs increased plasma levels of im...

Acute, nonselective nitric oxide synthase inhibition in the pregnant rat decreases glomerular filtration rate and renal plasma flow, suggesting a role for nitric oxide in mediating renal vasodilation during pregnancy. As mid-gestation in the rat is associated with a significant increase in renal protein expression of inducible nitric oxide synthase, the aim of this study was to examine the role...

To evaluate the effects of acute protein loading on the glomerular filtration rate, albumin excretion rate and concentration of plasma amino acids, ten healthy volunteers and six type 2 diabetic patients with normoalbuminuria were studied before and after eating 0.7 g/kg body weight of tuna fish, boiled egg white, cheese or tofu (bean curd) on separate days. Furthermore, to study the possible r...

Glossary: ADH – antidiuretic hormone AVP – arginine-vasopressin, vasopressin bw – body weight Ccr – changes in glomerular filtration rate (GFR) based on endogenic creatinine clearance Cin – changes in glomerular filtration rate (GFR) based on inulin clearance ERPF – Effective renal plasma flow (ml/min/m2) EPBF – Effective renal blood flow (ml/min/m2) FF – Filtration fraction (%) GFR – Glomerula...