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Loss of superficial femoral artery relaxation following ischemia-reperfusion. J Surg Res 1996 Feb 01;60(2):361-4

Date

02/01/1996

Pubmed ID

8598669

DOI

10.1006/jsre.1996.0058

Scopus ID

2-s2.0-0030066713   9 Citations

Abstract

Acute ischemia followed by reperfusion in skeletal muscle is associated with tissue edema and necrosis. The purpose of this study was to demonstrate superficial femoral artery endothelial injury following complete ischemia with reperfusion. New Zealand white rabbits underwent total devascularization of one hindlimb for 3 hr followed by 0, 1, and 2 hr of reperfusion. Control rabbits underwent a sham operation. Superficial femoral artery rings were then studied for acetylcholine induced relaxation in vitro. The response to acetylcholine was measured as percentage relaxation at three incremental doses (1 x 10(-7) , 3 x 10(-7) and 5 x 10(-7) M). The ischemia-only (26.30 +/- 7.07, 62.63 +/- 8.64, 88.08 +/- 5.25%) and the 1-hr reperfusion group (19.35 +/- 12.99, 39.24 +/- 15.78, 62.01 +/- 14.03%) showed no significant difference (P > or = 0.05, Student's t test) in relaxation as compared to the control group (13.73 +/- 2.11, 47.88 +/- 7.23, 72.44 +/- 9.00%). The 2-hr reperfusion group (6.10 +/- 1.02, 15.33 +/- 2.56, 34.67 +/- 6.31%), however, had a significant loss of relaxation at all three doses of acetylcholine compared to that seen in the control group (P < or = 0.05, Student's t test). In this model of complete ischemia, superficial femoral artery rings lose their ability to relax in response to acetylcholine following 3 hr of ischemia and 2 hr of reperfusion, demonstrating endothelial injury. However, immediately after 3 hr of ischemia or ischemia followed by only 1 hr of reperfusion, superficial femoral artery rings did not lose their ability to relax in response to acetylcholine. This study identifies a window of opportunity for therapeutic intervention after ischemia and prior to endothelial injury from reperfusion.

Author List

Chiang PC, Traul DK, Farooq MM, Lesniak RJ, Seabrook GR, Towne JB, Freischlag JA

Author

Gary R. Seabrook MD Chief, Professor in the Surgery department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Animals
Endothelium, Vascular
Femoral Artery
Free Radicals
Ischemia
Male
Rabbits
Reperfusion Injury
Vasodilation
jenkins-FCD Prod-398 336d56a365602aa89dcc112f077233607d6a5abc