Biomaterial Database

Effects of nifedipine on renin release and renal function in anesthetized dogs. 1986

J Imagawa, and H Kurosawa, and S Satoh

The effects of nifedipine, classed as a calcium entry blocker, on urinary excretion and renin release were investigated in anesthetized dogs. Nifedipine was infused into one renal artery for three consecutive 10-min periods, at incremental rates of 0.3, 1, and 3 micrograms/min. Intrarenal infusion of nifedipine (3 micrograms/min) produced marked increases in urine flow rate (by 200%) and in urinary sodium (by 210%) and potassium (by 40%) excretion rates of the infused kidney without changes in mean systemic blood pressure, heart rate, glomerular filtration rate, and filtration fraction. Urinary osmolarity was slightly decreased by the drug, but this change was not statistically significant. There were no consistent changes in these parameters for the contralateral noninfused kidney. Renin secretion rate was increased to three times the preinfusion level during infusion of the highest nifedipine dose. The blood flow to the infused kidney was increased, and ipsilateral renal vascular resistance was simultaneously decreased upon nifedipine infusion. These results suggest that a nonhypotensive dose of nifedipine causes an increase in renin secretion and that this drug has a striking effect on the reabsorption of sodium and water by the renal tubules.

UI	MeSH Term	Description	Entries
D007261	Infusions, Intra-Arterial	Regional infusion of drugs via an arterial catheter. Often a pump is used to impel the drug through the catheter. Used in therapy of cancer, upper gastrointestinal hemorrhage, infection, and peripheral vascular disease.	Infusions, Regional Arterial,Infusions, Intra Arterial,Infusions, Intraarterial,Arterial Infusion, Intra,Arterial Infusion, Regional,Arterial Infusions, Intra,Arterial Infusions, Regional,Infusion, Intra Arterial,Infusion, Intra-Arterial,Infusion, Intraarterial,Infusion, Regional Arterial,Intra Arterial Infusion,Intra Arterial Infusions,Intra-Arterial Infusion,Intra-Arterial Infusions,Intraarterial Infusion,Intraarterial Infusions,Regional Arterial Infusion,Regional Arterial Infusions
D008297	Male		Males
D009318	Natriuresis	Sodium excretion by URINATION.	Natriureses
D009543	Nifedipine	A potent vasodilator agent with calcium antagonistic action. It is a useful anti-anginal agent that also lowers blood pressure.	Adalat,BAY-a-1040,Bay-1040,Cordipin,Cordipine,Corinfar,Fenigidin,Korinfar,Nifangin,Nifedipine Monohydrochloride,Nifedipine-GTIS,Procardia,Procardia XL,Vascard,BAY a 1040,BAYa1040,Bay 1040,Bay1040,Monohydrochloride, Nifedipine,Nifedipine GTIS
D011188	Potassium	An element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells. Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.
D012077	Renal Artery	A branch of the abdominal aorta which supplies the kidneys, adrenal glands and ureters.	Arteries, Renal,Artery, Renal,Renal Arteries
D012079	Renal Circulation	The circulation of the BLOOD through the vessels of the KIDNEY.	Kidney Circulation,Renal Blood Flow,Circulation, Kidney,Circulation, Renal,Blood Flow, Renal,Flow, Renal Blood
D012083	Renin	A highly specific (Leu-Leu) endopeptidase that generates ANGIOTENSIN I from its precursor ANGIOTENSINOGEN, leading to a cascade of reactions which elevate BLOOD PRESSURE and increase sodium retention by the kidney in the RENIN-ANGIOTENSIN SYSTEM. The enzyme was formerly listed as EC 3.4.99.19.	Angiotensin-Forming Enzyme,Angiotensinogenase,Big Renin,Cryorenin,Inactive Renin,Pre-Prorenin,Preprorenin,Prorenin,Angiotensin Forming Enzyme,Pre Prorenin,Renin, Big,Renin, Inactive
D004231	Diuresis	An increase in the excretion of URINE. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Diureses
D004285	Dogs	The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)	Canis familiaris,Dog