Effects of angiotensin II and C-type natriuretic peptide on the in situ perfused trunk preparation of the dogfish, Scyliorhinus canicula.

Abstract:

:The renal roles of physiologically relevant doses of angiotensin II (Ang II) and C-type natriuretic peptide (CNP) were investigated in the dogfish, Scyliorhinus canicula, using an in situ perfused trunk preparation. Perfusion with 10(-9) M Ang II resulted in a glomerular antidiuresis and decreases in perfusate flow rate, transport maxima for glucose and the proportion of filtering glomeruli. In addition, the renal clearances and excretion of urea, sodium, and chloride were significantly reduced, whereas the relative clearances of these parameters remained unchanged. In contrast, perfusion of 10(-9) M CNP caused a glomerular diuresis, an increase in transport maxima for glucose, but no significant change in the proportion of filtering glomeruli. In addition, the renal clearances of urea, sodium, and chloride were significantly increased but there was no effect on the relative clearances of urea, sodium, or chloride. Perfusion with 10(-10) M Ang II or CNP had no significant renal effects. Our results suggest that these hormones act at the level of the glomeruli rather than at a tubular level.

journal_name

Gen Comp Endocrinol

authors

Wells A,Anderson WG,Cains JE,Cooper MW,Hazon N

doi

10.1016/j.ygcen.2005.08.002

keywords:

subject

Has Abstract

pub_date

2006-01-15 00:00:00

pages

109-15

issue

2

eissn

0016-6480

issn

1095-6840

pii

S0016-6480(05)00240-6

journal_volume

145

pub_type

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