Combination of hypercholesterolemia and hypertension augments renal function abnormalities

Martin Rodriguez-Porcel, James D. Krier, Amir Lerman, Patrick F. Sheedy, J. Carlos Romero, Claudio Napoli, Lilach O. Lerman

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

Hypercholesterolemia and hypertension are both risk factors for end-stage renal disease. This study was designed to examine whether their coexistence augmented impairment in renal function and redox status. Regional renal hemodynamics and function in response to vasoactive challenges with acetylcholine or sodium nitroprusside were quantified by using electron-beam computed tomography in pigs after 12 weeks of either a normal (n=10) or hypercholesterolemic (n= 10) diet, renovascular hypertension (n=7), or combined hypercholesterolemia+hypertension (n=6). The hypercholesterolemic and hypercholesterolemic+hypertensive groups had significantly increased serum cholesterol levels, whereas in the hypertensive and hypercholesterolemic+hypertensive groups, mean arterial pressure was significantly elevated compared with the group fed a normal diet. Basal regional renal perfusion and glomerular filtration rates were similar among the groups. In response to acetylcholine, cortical perfusion increased in normal animals (15.6±4.7%, P=0.002) but not in hypercholesterolemic or hypertensive animals (8.0±7.4% and 8.2±5.9%, respectively: P>0.05). Moreover, in the hypercholesterolemic+hypertensive group, cortical perfusion response was further attenuated (2.5±4.8%, P=0.02) and significantly different from the group fed a normal diet (P<0.05). The response to sodium nitroprusside followed a similar pattern, and the impairment was augmented in the hypercholesterolemic+hypertensive group. The functional abnormalities in hypercholesterolemia or hypertension were associated with a decrease in systemic and/or renal tissue levels of oxygen radical scavengers that was again accentuated in hypercholesterolemia+hypertension. These results demonstrate that concurrent hypercholesterolemia and hypertension have a greater detrimental effect on renal perfusion responses compared with hypercholesterolemia or hypertension alone, associated with a marked pro-oxidant shift in redox status. These effects may potentially augment renal functional impairment and play a role in the initiation and progression of renal injury, in hypertension and atherosclerosis.

Original languageEnglish (US)
Pages (from-to)774-780
Number of pages7
JournalHypertension
Volume37
Issue number2 II
DOIs
StatePublished - 2001

Keywords

  • Blood flow
  • Cholesterol
  • Hypertension
  • Imaging
  • Oxidative stress
  • Renal

ASJC Scopus subject areas

  • Internal Medicine

Fingerprint Dive into the research topics of 'Combination of hypercholesterolemia and hypertension augments renal function abnormalities'. Together they form a unique fingerprint.

Cite this