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 Endocrinoljournal_title
General and comparative endocrinologyauthors
Wells A,Anderson WG,Cains JE,Cooper MW,Hazon Ndoi
10.1016/j.ygcen.2005.08.002keywords:
subject
Has Abstractpub_date
2006-01-15 00:00:00pages
109-15issue
2eissn
0016-6480issn
1095-6840pii
S0016-6480(05)00240-6journal_volume
145pub_type
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