Abstract:
:Experimental perfusions of isolated rat kidneys were performed with flow rates adjusted to produce comparable glomerular filtration rates (GFR) in control and experimental groups. The experimental perfusate, consisting of Krebs-Ringer bicarbonate (KRB) containing 3.5% (uncrosslinked) stroma-free hemoglobin (SFH) plus 3.5% of the perfluorochemical (PFC) Fluosol-DA, was found to produce only 48% as much urine as the control perfusate consisting of KRB containing 7% dextran (without either SFH or PFC). Perfusion with the experimental SFH/PFC mixture was associated with mean fractional reabsorptions of sodium 3.3% greater and of potassium 5.1% lesser than perfusion with the control KRB (with dextran) solution (p < .05). The SFH/PFC mixture was localized histochemically to the capillaries and urinary spaces of glomeruli; and to the apical microvilli, basal laminae, and intracytoplasmic vacuoles of proximal renal tubular cells. Since the glomerular filtration rate was not a factor, decremental urine production appears to be associated with increased reabsorption of sodium, excretion of potassium, and proximal tubular uptake of the experimental SFH/PFC mixture by endocytosis.
journal_name
Ren Failjournal_title
Renal failureauthors
Millis RM,Barber JD,Anderson WA,Dehkordi Odoi
10.3109/08860229509037635subject
Has Abstractpub_date
1995-11-01 00:00:00pages
675-87issue
6eissn
0886-022Xissn
1525-6049journal_volume
17pub_type
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