What question did this study set out to answer?

This study aims to investigate the levels of interstitial purine metabolites during ischemia in isolated rat hearts using cardiac microdialysis.

June 1, 1992AJP Heart and Circulatory Physiology

Cardiac microdialysis in isolated rat hearts: interstitial purine metabolites during ischemia

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This study aims to investigate the levels of interstitial purine metabolites during ischemia in isolated rat hearts using cardiac microdialysis.
Microdialysis probes were implanted in isolated rat hearts and perfused with Krebs-Henseleit buffer.
Effluent dialysate was assessed for adenosine, inosine, hypoxanthine, xanthine, and uric acid over 135 minutes.
Hearts were pre-treated with an adenosine deaminase inhibitor to measure its effects on metabolite accumulation.
All purine metabolites increased during ischemia, with inosine being the most abundant compound.
Baseline concentrations in ISF were estimated at 0.47 µM adenosine, 0.85 µM inosine, 0.29 µM hypoxanthine, 0.49 µM xanthine, and 8.6 µM uric acid.
The adenosine deaminase inhibitor enhanced ISF adenosine but reduced other purine metabolite levels.

Structured PICO

Population

Isolated perfused rat hearts

Intervention

Cardiac microdialysis (probes implanted in the left ventricular myocardium, perfused at 0.5 microliter/min with Krebs-Henseleit buffer) during global zero-flow ischemia (37 degrees C), with or without 50 microM erythro-9-(2-hydroxy-3-nonyl)adenine pretreatment

Comparator

Baseline (pre-ischemia) levels

Outcome

Intramyocardial interstitial fluid levels of purine metabolites (adenosine, inosine, hypoxanthine, xanthine, and uric acid)surrogate

Cardiac microdialysis is a simple and versatile technique for continuously sampling intramyocardial interstitial fluid purine metabolites in isolated perfused hearts during ischemia.

Discussion

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Implication

ADA inhibition boosts interstitial adenosine during ischemia in isolated hearts; leaves open in vivo cardioprotection and clinical translation.

Cite This Study

Wylen et al. (1992) studied this question.

synapsesocial.com/papers/6a1feaec2065d284090da3fa https://doi.org/10.1152/ajpheart.1992.262.6.h1934

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Implication

ADA inhibition boosts interstitial adenosine during ischemia in isolated hearts; leaves open in vivo cardioprotection and clinical translation.

Cardiac microdialysis in isolated rat hearts: interstitial purine metabolites during ischemia

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Cardiac microdialysis in isolated rat hearts: interstitial purine metabolites during ischemia

Key Points

Structured PICO

Discussion

Implication

Cite This Study

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