Effect of anteroventral third ventricle lesions on vascular sodium-pump activity in two-kidney Goldblatt hypertension.
We studied the effects of anteroventral third ventricle (AV3V) lesions on the vascular Na+-pump activity and blood pressure of rats prepared by the two-kidney Goldblatt procedure. Blood pressures and Na+-pump activity of the isolated tail arteries, measured as ouabain-sensitive 86Rb+-uptake were determined in rats with renal artery clips, rats with AV3V lesions, and rats with AV3V lesions. Rats with renal artery clips developed higher blood pressures (40%) and higher vascular Na+-pump activity (20%-35%) than rats with no renal clips. Placement of AV3V lesions prior to the placement of renal clips prevented the increase in blood pressure and the increase in vascular Na+-pump activity. Plasma potassium and creatinine concentrations, nonspecific 86Rb+-uptake, and hematocrit were not different among these groups. Plasma sodium concentration was elevated in the AV3V lesioned control group. These experiments suggest a possible role of this CNS region in the regulation of vascular Na+-pump function during hypertensive states.
D000818:Animals; D001158:Arteries / Q000378:metabolism*; D001794:Blood Pressure; D002552:Cerebral Ventricles / Q000502:physiology*; D006977:Hypertension, Renal / Q000503:physiopathology*; D007473:Ion Channels / Q000378:metabolism*; D008297:Male; D011868:Radioisotopes; D051381:Rats; D011919:Rats, Inbred Strains; D012413:Rubidium / Q000378:metabolism; D012964:Sodium / Q000378:metabolism*; D013623:Tail / Q000098:blood supply
D007473:Ion Channels; D011868:Radioisotopes; D012964:Sodium; D012413:Rubidium