Walter H Folger

Learn More
This study was designed to characterize rat glomerular thromboxane A2 (TxA2) receptors and compare them to rat platelet TxA2 receptors. The radioligand binding characteristics of the receptors were characterized using [125I][1S-(1 alpha,2 beta(5Z),3 alpha-(1E,3R*),4 alpha]-7-[3-(3-hydroxy-4-(4'-iodophenoxy)-1-butenyl)-7-oxabicyclo-(More)
Studies were designed to test the role of the endothelium and endogenous release of thromboxane (Tx) A2 in the contractile response of rat thoracic aortic rings to the TxA2/prostaglandin (PG) H2 mimetic, U-46,619. U-46,619 caused a dose-dependent contraction of rings with endothelium (mean ED50 = 6.54 +/- 3.02 x 10(-9) M; n = 13) which was abolished by the(More)
Thromboxane A2 (TxA2) or its stable mimetic U-46,619 can increase the generation of arachidonate metabolites. Therefore, these studies were designed to investigate the role of prostaglandins, TxA2, and leukotrienes in the renal vascular response to U-46,619. Anesthetized rats were studied during a basal period and during an intra-aortic infusion of vehicle(More)
Thromboxane A2 (TXA2) and prostaglandin H2 (PGH2) are potent vasoactive and proaggregatory agents whose synthesis has been shown to be elevated in diabetes mellitus. In the present study the effects of streptozotocin (STZ)-induced uncontrolled diabetes (Severe) and insulin-treated STZ diabetes (Moderate) on TXA2/PGH2 receptor density and affinity in(More)
U-46,619 infused at 10 ng.kg-1.min-1 in anesthetized rats reduced the glomerular capillary pressure only during engagement of tubuloglomerular feedback (TGF). 100 ng.kg-1.min-1 induced renal vasoconstriction, whereas femoral vasoconstriction and a rise in BP required 1,000-10,000 ng.kg-1.min-1. These results implicate TGF in the extreme sensitivity of the(More)
Slices (400 microm) containing the area postrema were prepared from three Japanese house musk shrews. Data reported are from 16 representative units. Units fell into one of three separate groups with spontaneous firing rates of 36-41/s, 16-18/sec. and 6-8/sec., possibly reflecting different set points of an endogenous pacemaker. Most neurons did not respond(More)
Orthostatic hypotension developed in a 65-year-old man during treatment with quinidine and propranolol. Quinidine reduced standing blood pressure, attenuated the Valsalva response, and increased plasma norepinephrine concentrations, suggesting the presence of nonselective alpha-adrenergic blockade. The addition of propranolol inhibited the compensatory(More)
Slices (400 mm) containing the area postrema were prepared from three Japanese house musk shrews. Data reported are from 16 representative units. Units fell into one of three separate groups with spontaneous ®ring rates of 36±41/s, 16± 18/sec. and 6±8/sec., possibly re¯ecting different set points of an endogenous pacemaker. Most neurons did not respond to(More)
  • 1