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Direct effects of endotoxin on the function of the isolated perfused rat kidney.

Abstract：

:When the endotoxin-lipopolysaccharide (LPS) derived from the cell wall of gram-negative bacteria is given to the rat in vivo, there are prompt, marked decreases in glomerular filtration rate (GFR), renal blood flow (RBF) and % Na+ reabsorption (%T-Na+). However, it has not been determined whether the endotoxin itself has a direct effect on these renal functions. To test whether endotoxin has a direct renal effect, isolated rat kidneys (N = 8) were perfused for 160 minutes with a Krebs-Ringer-HCO3- solution containing substrate-free albumin (40 g/liter), glucose (5 mM) and L(+) lactate (7.5 mM). After control observations (20 to 80 min) were made, purified LPS from E. coli was added (N = 4) to the perfusate to achieve [endotoxin] of 0.01 micrograms/ml (80 to 120 min) and 0.1 micrograms/ml (120 to 160 min). Endotoxin had no effect on GFR, Na+ reabsorption or tissue K+ content when compared to timed-control perfusions (N = 4). There was a small (approximately 10%) but significant decrease in mean perfusion flow rate (PFR) at the highest [endotoxin] when compared to the low [endotoxin]p but no change in GFR occurred. When the same LPS was given to four rats in vivo at a dose which achieved an [endotoxin] of approximately 0.08 micrograms/ml plasma, there were prompt decreases in GFR and %T-Na+ and an increase in body temperature when compared with timed-controls; there also was a large loss of K+ from the kidney tissue.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Kidney Int

journal_title

Kidney international

authors

Cohen JJ,Black AJ,Wertheim SJ

doi

10.1038/ki.1990.105

subject

Has Abstract

pub_date

1990-05-01 00:00:00

pages

1219-26

issue

5

eissn

0085-2538

issn

1523-1755

pii

S0085-2538(15)34867-5

journal_volume

37

pub_type

杂志文章

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