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Role of thromboxane A2 in muscle injury following ischaemia.

Homer-Vanniasinkam, S; Crinnion, JN; Gough, MJ; (1994) Role of thromboxane A2 in muscle injury following ischaemia. Br J Surg , 81 (7) 974 - 976.

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Abstract

The effect of a thromboxane A2 receptor antagonist (GR32191) on gastrocnemius muscle blood flow, oedema and viability was assessed in a rodent model of 6-h unilateral hindlimb ischaemia and 4-h reperfusion, and the results compared with those in control and normal groups, and in animals undergoing 6-h ischaemia alone. Control animals demonstrated reduced muscle blood flow throughout reperfusion (at 10 min, P < 0.01 versus normal, P not significant versus ischaemia; at 120 min, P < 0.05 versus normal and ischaemia; at 240 min, P < 0.01 versus normal, P not significant versus ischaemia), and the development of muscle oedema (P < 0.01 versus normal and ischaemia) and muscle necrosis (P < 0.01 versus normal and ischaemia). In contrast, the thromboxane A2 receptor antagonist enhanced muscle blood flow (at 10 min, P < 0.01 versus control; at 120 min, P < 0.05 versus control; at 240 min, P < 0.01 versus control) and preserved muscle viability (P < 0.01 versus control; P not significant versus normal and ischaemia). These results indicate that thromboxane A2 is an important mediator of skeletal muscle reperfusion injury and suggest that administration of a thromboxane A2 receptor antagonist may improve limb salvage rates after surgery for acute ischaemia.

Type:Article
Title:Role of thromboxane A2 in muscle injury following ischaemia.
Location:ENGLAND
Language:English
Keywords:Animals, Biphenyl Compounds, Disease Models, Animal, Edema, Extremities, Heptanoic Acids, Ischemia, Male, Muscles, Rats, Rats, Sprague-Dawley, Receptors, Thromboxane, Reperfusion Injury
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Surgery and Interventional Science (Division of)

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