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- W1991893467 abstract "Glomerular hemodynamics were studied by micropuncture technique in the unclipped kidney in rats in which modest two kidney Goldblatt hypertension was maintained for 4 weeks and in normotensive controls. Both groups ingested less than 2 mEq Na+/day. In hypertensive rats at micropuncture, mean hydrostatic pressure was elevated both systematically (128 +/- 5 vs 113 +/- 3 mm Hg, p less than 0.05) and within glomerular capillaries (55 +/- 2 vs 48 +/- 1 mm Hg, p less than 0.05), resulting in an increase in the transglomerular hydrostatic pressure gradient (40 +/- 2 vs 33 +/- 1 mm Hg, p less than 0.05). The glomerular capillary permeability coefficient, however, was decreased in the hypertensive rats (0.063 +/- 0.017 vs 0.115 +/- 0.011 nl/s/g kw/mm Hg, p less than 0.05), resulting in no change in nephron filtration rate 38.9 +/- 2.3 vs 39.0 +/- 2.5 nl/min/g kw). Nephron plasma flow also remained unchanged (154 +/- 10 vs 140 +/- 7 ml/min/g kw). In separate studies in this model of hypertension, saralasin infusion demonstrated a peripheral effect of circulating angiotensin II which was increased over controls. Kidney mass and GFR were not different between clipped and unclipped kidneys. No consistent abnormalities were observed by light or electron microscopy either in glomeruli or in vessels in the unclipped kidney. This study demonstrates that glomerular hemodynamics may be altered early in the course of modest hypertension in this model without altering blood flow or filtration rate. The decrease in glomerular capillary area and/or permeability (LpA) in the hypertensive rats could be either a result of the increased effect of circulating angiotensin II or the direct effect of glomerular capillary hypertension." @default.
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- W1991893467 title "Glomerular hemodynamics in moderate Goldblatt hypertension in the rat." @default.
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- W1991893467 doi "https://doi.org/10.1161/01.hyp.4.1.51" @default.
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