Abstract:
:Urinary output of Na+ and K+, and volume of urine have been studied in conscious, unrestrained, water-loaded male rats following the intraseptal injection of catecholamines. Natriuresis and kaliuresis increased after injecting noradrenaline (NA), the intensity being dose related. The dose-response curve suggests that a monomolecular interacting takes place between NA and pharmacological receptors present in the septal area. No change was observed in diuresis. Systematic mapping of the septal area yielded about the same results for all sites except a zone located in the lateral nucleus that was more sensitive. An alpha blocker (dibenamine), injected intraseptally before NA, showed an inhibitory effect while a beta blocker (propranolol) yielded a potentiation effect. These same effects of the blocking agents were observed when adrenaline was used instead of NA. Lidocaine, which inhibits the re-uptake of NA, showed an enhancement of the natriuretic and kaliuretic effect of NA, and the same effect was observed when the enzymatic destruction of NA was prevented by nialamide, an inhibitor of monoaminoxidase. Dopamine showed a natriuretic effect, but no effect was observed on K+ and urine output. Serotonin had no action on natriuresis, kaliuresis and diuresis.
journal_name
Can J Physiol Pharmacoljournal_title
Canadian journal of physiology and pharmacologyauthors
Camargo LA,Saad WA,Netto CR,Gentil CG,Antunes-Rodrigues J,Covian MRdoi
10.1139/y76-034subject
Has Abstractpub_date
1976-06-01 00:00:00pages
219-28issue
3eissn
0008-4212issn
1205-7541journal_volume
54pub_type
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