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Tubuloglomerular feedback and glomerular morphology in Goldblatt hypertensive rats on varying protein diets.

Abstract：

:The present experiments were performed to examine the effect of variation in protein intake on renal function and morphology in the non-clipped kidneys of Goldblatt hypertensive rats. After renal artery clipping, rats were put on diets containing 5 (LP), 17.5 (NP), or 51% (HP) protein. After 4 to 5 weeks, all rats had developed hypertension. GFR was directly correlated with protein intake (1.47 +/- 0.15 in HP, 1.19 +/- 0.14 in NP, and 0.93 +/- 0.08 ml/min in LP), as was SNGFR (44.2 +/- 1.89, 39.1 +/- 2.23, and 27.9 +/- 0.86 nl/min in HP, NP, and LP rats). The response of SNGFR to changes in loop of Henle flow rate was attenuated in NP and HP rats: the maximum decrease was reduced (30.0 +/- 5.2% in NP, 22.1 +/- 4.2% in HP) and higher tubular flow rates were required to elicit responses (V1/2, the flow rate at which the response is half-maximum, was 28.9 +/- 2.6 nl/min in NP and 28.2 +/- 1.4 nl/min in HP). In LP rats, the maximum response was a decrease of 47.7 +/- 2.5%, and V1/2 was 18.1 +/- 1.2 nl/min, values similar to those found in normal control rats. The weights of the non-clipped kidneys were 0.96 +/- 0.04 g (LP), 1.06 +/- 0.05 g (NP), and 1.36 +/- 0.06 g (HP). In the LP rats there was no difference between the non-clipped and clipped kidneys. Light microscopic evaluation showed a high incidence of focal glomerulosclerosis in non-clipped kidneys of HP rats, but no glomerular lesions in the non-clipped kidneys of LP rats.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Kidney Int

journal_title

Kidney international

authors

Schnermann J,Gokel M,Weber PC,Schubert G,Briggs JP

doi

10.1038/ki.1986.30

subject

Has Abstract

pub_date

1986-02-01 00:00:00

pages

520-9

issue

2

eissn

0085-2538

issn

1523-1755

pii

S0085-2538(15)33613-9

journal_volume

29

pub_type

杂志文章

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