View clinical trials related to Obesity-induced Hyperfiltration.
Filter by:Background: Obesity is associated with a high prevalence of chronic kidney disease.The glomerular hyperfiltration associated with obesity may play a role in the pathogenesis of obesity associated chronic kidney disease. Attenuation of hyperfiltration by pharmacological means may slow down the development and progression of chronic renal failure. The investigators have previously shown that acetazolamide, a proximally acting diuretic that activates tubuloglomerular feedback(TGF) by increasing solute delivery to the Macula DENSA, abates glomerular hyperfiltration. The present study was designed to test the hypothesis that this decrease in hyperfiltration is specific to acetazolamide and not due to a non specific diuretic effect. The aim of the present study is to compare the effects of furosemide and acetazolamide on glomerular hemodynamics in subjects with severe obesity. Methods: A randomized double-blind crossover controlled design will be used. Fifteen obese subjects and ten subjects with normal body weight will participate in the study. Obese subjects will undergo measurement of glomerular filtration rate (GFR)(inulin clearance), renal plasma flow (RPF) (p-aminohippuric acid clearance), filtration fraction, fractional excretion of lithium (FE LI) and blood pressure, before and after intravenous administration of furosemide 2 mg. and acetazolamide 5 mg/kg BW. Ten subjects with normal body weight will undergo measurement of renal function without administration of diuretics.
Background: Obesity is associated with a high prevalence of chronic kidney disease. The glomerular hyperfiltration associated with obesity may play a role in the pathogenesis of obesity associated chronic kidney disease. Attenuation of hyperfiltration by pharmacological means may slow down the development and progression of chronic renal failure. The investigators have previously shown that acetazolamide, a proximally acting diuretic that activates TGF by increasing solute delivery to the macula densa, abates glomerular hyperfiltration. The present study was designed to test the hypothesis that this decrease in hyperfiltration is specific to acetazolamide and not due to a non specific diuretic effect. The aim of the present study is to evaluate the effects of the administration of furosemide p.o. to subjects with severe obesity on glomerular hemodynamics. Methods: Ten obese subjects will participate in the study. They will undergo measurement of glomerular filtration rate (inulin clearance) (GFR), renal plasma flow (RPF) (p-aminohippuric acid clearance), filtration fraction, fractional excretion of lithium (FE LI) and blood pressure, before and after administration of oral furosemide 20 to 40 mg bid for 3 days. The effects of furosemide on glomerular hemodynamics in obese subjects will be compared to the previously studied effects of acetazolamide.