What question did this study set out to answer?

To determine whether oxypurinol, a xanthine oxidase inhibitor, preserves adenosine and adenine nucleotide pools and improves recovery in the rat brain during ischemia and reperfusion.

May 1, 1995Journal of Neurochemistry

Oxypurinol‐Enhanced Postischemic Recovery of the Rat Brain Involves Preservation of Adenine Nucleotides

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To determine whether oxypurinol, a xanthine oxidase inhibitor, preserves adenosine and adenine nucleotide pools and improves recovery in the rat brain during ischemia and reperfusion.
Rats received intravenous oxypurinol (40 mg/kg) or no treatment 20 minutes prior to a 20-minute period of cerebral ischemia induced by four-vessel occlusion with arterial hypotension (45–50 mm Hg).
Brain tissues were fixed by microwave radiation before ischemia, at the end of ischemia, and after 5, 10, 45, and 90 minutes of reperfusion to measure purine and nucleotide levels.
Oxypurinol significantly increased ATP levels at the end of ischemia and at 5 minutes of reperfusion, elevated end-ischemic ADP, and significantly increased cellular energy charge during ischemia and early reperfusion.
AMP and adenosine concentrations were significantly reduced in oxypurinol-treated rats at the end of ischemia and during initial reperfusion compared to untreated controls.
Treated rats demonstrated accelerated physiological stabilization, marked by shortened times to the recovery of mean arterial blood pressure and the onset of spontaneous respiration.

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Implication

Animal experiment reveals that oxypurinol preserves brain adenine nucleotides and accelerates recovery after cerebral ischemia in rats, suggesting purine-sparing mechanisms enhance cerebroprotection.

Cite This Study

Phillis et al. (1995) studied this question.

synapsesocial.com/papers/6a9da10f043213175448a596 https://doi.org/10.1046/j.1471-4159.1995.64052177.x

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Implication

Animal experiment reveals that oxypurinol preserves brain adenine nucleotides and accelerates recovery after cerebral ischemia in rats, suggesting purine-sparing mechanisms enhance cerebroprotection.

Oxypurinol‐Enhanced Postischemic Recovery of the Rat Brain Involves Preservation of Adenine Nucleotides

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Discussion

Implication

Cite This Study

Oxypurinol‐Enhanced Postischemic Recovery of the Rat Brain Involves Preservation of Adenine Nucleotides

Key Points

Discussion

Implication

Cite This Study

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