Effects of renal denervation on renin release in response to tilting and furosemide.
In anesthetized cats head-up tilting for 30 min and infusion of furosemide at 0.75 mg/kg in 30 min significantly raised renin release from the innervated kidney (increments of 90.7 +/- 21.4 ng/min on tilting and 105.4 +/- 26.4 ng/min after furosemide); a small and inconstant increase from the contralateral denervated kidney (increments of 16.8 +/- 16.0 and 16.3 +/- 17.7 ng/min, respectively) was abolished by acute bilateral adrenalectomy. Larger doses of furosemide (6.0 mg/kg) could release renin from the denervated kidney also, but the response was still more marked on the innervated side especially in the early period of infusion (increments of 132.7 +/- 23.8 and 33.7 +/- 23.8 ng/min of innervated and denervated sides at 10 min). The response of the denervated kidney to 6.0 mg furosemide/kg was not affected by adrenalectomy. Stimulation of juxtaglomerular cells by tilting is entirely due to sympathoadrenergic activation; stimulation by furosemide is also entirely neural when the diuretic drug is given in moderate doses, but is partly independent of innervation when larger doses are administered.
D000315:Adrenalectomy; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D002415:Cats; D004305:Dose-Response Relationship, Drug; D005260:Female; D005665:Furosemide / Q000494:pharmacology*; D006339:Heart Rate / Q000187:drug effects; D007668:Kidney / Q000098:blood supply / Q000294:innervation* / Q000502:physiology; D007677:Kidney Function Tests; D008297:Male; D011187:Posture; D012039:Regional Blood Flow / Q000187:drug effects; D012083:Renin / Q000097:blood*; D013564:Sympathetic Nervous System / Q000502:physiology*
D005665:Furosemide; D012083:Renin