Effect of tertatolol on glomerular hemodynamics in the normal Munich-Wistar rat.
Am J Hypertens
; 2(11 Pt 2): 213S-218S, 1989 Nov.
Article
em En
| MEDLINE
| ID: mdl-2573366
ABSTRACT
Administration of beta-blockers is frequently associated with decreases in both renal plasma flow and glomerular filtration rate (GFR). Tertatolol, a new non-selective beta-blocker, has demonstrated similar systemic effects to other conventional beta-blockers, but tertatolol produces increases in both renal plasma flow and glomerular filtration rate. To evaluate the renal hemodynamic mechanism responsible for the increase in GFR, micropuncture experiments were performed in normal Munich-Wistar rats. Intravenous injection of tertatolol produced a significant increase in GFR and urinary sodium excretion in spite of a decrease in systemic blood pressure. Single nephron glomerular filtration rate was significantly increased due to an increase in single nephron plasma flow related to parallel afferent and efferent arteriolar dilatation. No significant changes in glomerular hydrostatic pressure, transcapillary hydrostatic pressure gradient or the ultrafiltration coefficient were demonstrated with tertatolol. The capacity of tertatolol to increase glomerular filtration rate and to promote sodium excretion without modifying critical glomerular pressures makes this agent a highly attractive antihypertensive drug.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Propanolaminas
/
Tiofenos
/
Antagonistas Adrenérgicos beta
/
Taxa de Filtração Glomerular
/
Hemodinâmica
Limite:
Animals
Idioma:
En
Ano de publicação:
1989
Tipo de documento:
Article