Isolated Langendorff-perfused rat hearts after 10 min pre-perfusion, were subjected to a substrate-free anoxic perfusion (20 min) followed by 20 min reperfusion with a glucose-containing oxygen-balanced medium. A similar experimental protocol was repeated in the presence either of 5 mM fructose or of 5 mM fructose-1,6-bisphosphate throughout the different perfusion conditions. High-energy phosphate compounds (adenosine triphosphate, creatine phosphate), adenine nucleotides, nicotinic coenzymes, lactate, pyruvate and glycogen content in the tissue were determined at the end of each perfusion period, while coronary flow, heart rate and lactate and pyruvate output were monitored throughout the whole duration of the experiments. On the whole, the results indicate that exogenous fructose-1,6-bisphosphate preserves high-energy metabolites during anoxia and restores myocardial metabolism and contractility during reperfusion, that a prolonged period of substrate-free anoxic perfusion renders the heart unable to normalize its metabolism during re-oxygenation and that fructose is not utilized by the heart for its energy demand. A possible hypothesis concerning the mechanism of action of fructose-1,6-bisphosphate is presented.

Lazzarino, G., Nuutinen, M.e., Tavazzi, B., Cerroni, L., Di Pierro, D., Giardina, B. (1991). Preserving effect of fructose-1,6-bisphosphate on high-energy phosphate compounds during anoxia and reperfusion in isolated Langendorff-perfused rat hearts. JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY, 23(1), 13-23.

Preserving effect of fructose-1,6-bisphosphate on high-energy phosphate compounds during anoxia and reperfusion in isolated Langendorff-perfused rat hearts

CERRONI, LOREDANA;
1991-01-01

Abstract

Isolated Langendorff-perfused rat hearts after 10 min pre-perfusion, were subjected to a substrate-free anoxic perfusion (20 min) followed by 20 min reperfusion with a glucose-containing oxygen-balanced medium. A similar experimental protocol was repeated in the presence either of 5 mM fructose or of 5 mM fructose-1,6-bisphosphate throughout the different perfusion conditions. High-energy phosphate compounds (adenosine triphosphate, creatine phosphate), adenine nucleotides, nicotinic coenzymes, lactate, pyruvate and glycogen content in the tissue were determined at the end of each perfusion period, while coronary flow, heart rate and lactate and pyruvate output were monitored throughout the whole duration of the experiments. On the whole, the results indicate that exogenous fructose-1,6-bisphosphate preserves high-energy metabolites during anoxia and restores myocardial metabolism and contractility during reperfusion, that a prolonged period of substrate-free anoxic perfusion renders the heart unable to normalize its metabolism during re-oxygenation and that fructose is not utilized by the heart for its energy demand. A possible hypothesis concerning the mechanism of action of fructose-1,6-bisphosphate is presented.
1991
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/10 - BIOCHIMICA
English
Con Impact Factor ISI
anoxia; fructose-1,6-bisphosphate; heart metabolism; reperfusion
Lazzarino, G., Nuutinen, M.e., Tavazzi, B., Cerroni, L., Di Pierro, D., Giardina, B. (1991). Preserving effect of fructose-1,6-bisphosphate on high-energy phosphate compounds during anoxia and reperfusion in isolated Langendorff-perfused rat hearts. JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY, 23(1), 13-23.
Lazzarino, G; Nuutinen, Me; Tavazzi, B; Cerroni, L; Di Pierro, D; Giardina, B
Articolo su rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/49494
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