Effect of reperfusion following cerebral ischaemia on the activity of the mitochondrial respiratory chain in the gerbil brain

Almeida, Angeles and Allen, Kathryn L. and Bates, TImothy E. and Clark, John B. (1995) Effect of reperfusion following cerebral ischaemia on the activity of the mitochondrial respiratory chain in the gerbil brain. Journal of neurochemistry, 65 (4). pp. 1698-1703. ISSN 0022-3042

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Full text URL: http://dx.doi.org/10.1046/j.1471-4159.1995.6504169...

Abstract

The effect of reperfusion following 30 min of cerebral ischaemia on brain mitochondrial respiratory chain activity has been studied in the gerbil. The state 3 respiration rates with both FAD- and NAD-linked substrates were reduced after ischaemia. After 5 min of reperfusion, state 3 respiration with FAD-linked substrates was restored, but levels of NAD-linked substrates did not return to control values until 30 min of reperfusion. By 120 min of reperfusion state 3 respiration decreased relative to control values with all substrates studied. Measurement of the individual respiratory chain complexes showed that complex I, complex II-III, and complex V activities were reduced after ischaemia. By 5 min of reperfusion complex II-III activity was restored, but the activities of complexes I and V did not return to control values until 30 min of reperfusion. In contrast, complex IV activity was unaffected by ischaemia or 5 and 30 min of reperfusion but was significantly reduced after 120 min of reperfusion, possibly owing to free radical production and lipid peroxidation.

Item Type:Article
Additional Information:The effect of reperfusion following 30 min of cerebral ischaemia on brain mitochondrial respiratory chain activity has been studied in the gerbil. The state 3 respiration rates with both FAD- and NAD-linked substrates were reduced after ischaemia. After 5 min of reperfusion, state 3 respiration with FAD-linked substrates was restored, but levels of NAD-linked substrates did not return to control values until 30 min of reperfusion. By 120 min of reperfusion state 3 respiration decreased relative to control values with all substrates studied. Measurement of the individual respiratory chain complexes showed that complex I, complex II-III, and complex V activities were reduced after ischaemia. By 5 min of reperfusion complex II-III activity was restored, but the activities of complexes I and V did not return to control values until 30 min of reperfusion. In contrast, complex IV activity was unaffected by ischaemia or 5 and 30 min of reperfusion but was significantly reduced after 120 min of reperfusion, possibly owing to free radical production and lipid peroxidation.
Keywords:brain, Ischemia, Ischaemia, Mitochondria, Reperfusion injury, Reperfusion, Respiratory chain, Electron Transport Chain, complexexs, cerebral ischaemia, cerebral ischemia
Subjects:A Medicine and Dentistry > A100 Pre-clinical Medicine
B Subjects allied to Medicine > B140 Neuroscience
B Subjects allied to Medicine > B200 Pharmacology, Toxicology and Pharmacy
A Medicine and Dentistry > A300 Clinical Medicine
Divisions:College of Science > School of Life Sciences
ID Code:5341
Deposited By: Timothy Bates
Deposited On:18 May 2012 18:01
Last Modified:18 May 2012 18:01

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