Enhanced skeletal muscle arteriolar reactivity to ANG II after recovery from ischemic acute renal failure

David Basile, Deborah L. Donohoe, Shane A. Phillips, Jefferson C. Frisbee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In addition to the long-term renal complications, previous studies suggested that after acute renal failure (ARF), rats manifest an increased pressor response to an overnight infusion of ANG II. The present study tested whether recovery from ARF results in alterations in sensitivity to the peripheral vasculature. ARF was induced in Sprague-Dawley rats by 45 min of bilateral renal ischemia and reperfusion. Animals were allowed to recover renal structure and function for 5-8 wk, after which the acute pressor responses to ANG II were evaluated either in vivo in in situ skeletal muscle arterioles or in isolated gracilis muscle arteries in vitro. Baseline arterial pressure was not different in ARF rats vs. sham-operated controls, although ARF rats exhibited an enhanced pressor response to bolus ANGII infusion compared with control rats. Steady-state plasma ANG II concentration and plasma renin activity were similar between ARF and control rats. Constrictor reactivity of in situ cremasteric arterioles from ARF rats was enhanced in response to increasing concentrations of ANG II; however, no difference was observed in arteriolar responses to elevated Po2, norepinephrine, acetylcholine, or sodium nitroprusside. Isolated gracilis muscle arteries from ARF rats also showed increased vasoconstriction in response to ANG II but not norepinephrine. In conclusion, recovery from ischemic ARF is not associated with hypertension but is associated with increased arteriolar constrictor reactivity to ANG II. Although the mechanisms of this altered responsiveness are unclear, such changes may relate, in part, to cardiovascular complications in patients with ARF and/or after renal transplant.

Original languageEnglish
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Volume289
Issue number6 58-6
DOIs
StatePublished - Dec 2005

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Acute Kidney Injury
Skeletal Muscle
Kidney
Arterioles
Norepinephrine
Arteries
Nitroprusside
Vasoconstriction
Renin
Acetylcholine
Reperfusion
Sprague Dawley Rats
Arterial Pressure
Ischemia
Hypertension
Transplants

Keywords

  • Blood pressure
  • Ischemia

ASJC Scopus subject areas

  • Physiology

Cite this

Enhanced skeletal muscle arteriolar reactivity to ANG II after recovery from ischemic acute renal failure. / Basile, David; Donohoe, Deborah L.; Phillips, Shane A.; Frisbee, Jefferson C.

In: American Journal of Physiology - Regulatory Integrative and Comparative Physiology, Vol. 289, No. 6 58-6, 12.2005.

Research output: Contribution to journalArticle

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